KR20190110006A - Mobile terminal performing system damage avodiance in multi-communication system - Google Patents

Abstract

According to the present invention, a mobile terminal comprises: a transceiver configured to operate in a first communication system and a second communication system; a first antenna configured to transmit or receive a first signal of the first communication system; a second antenna configured to transmit or receive a second signal of the second communication system; and a signal attenuator module configured to provide signal attenuation for the first signal on a path between the second antenna and a low noise amplifier (LNA) of the second communication system. Accordingly, system damage can be prevented in a non-synchronized state between the first communication system and the second communication system.

Description

MOBILE TERMINAL PERFORMING SYSTEM DAMAGE AVODIANCE IN MULTI-COMMUNICATION SYSTEM}

The present invention relates to a mobile terminal for performing a system damage prevention method in a multiple communication system. More particularly, the present invention relates to a mobile terminal for preventing damage to a receiving end in a multiple communication system.

Terminals may be divided into mobile / portable terminals and stationary terminals according to their mobility. The mobile terminal may be further classified into a handheld terminal and a vehicle mounted terminal according to whether a user can directly carry it.

The functions of mobile terminals are diversifying. For example, data and voice communication, taking a picture and video with a camera, recording a voice, playing a music file through a speaker system, and outputting an image or video to a display unit. Some terminals have an electronic game play function or a multimedia player function. In particular, recent mobile terminals may receive multicast signals that provide visual content such as broadcasting, video, and television programs.

As the terminal functions are diversified, for example, such a terminal is a multimedia player having a complex function such as taking a picture or a video, playing a music or video file, playing a game, or receiving a broadcast. Is being implemented.

In order to increase the function of such a terminal, it may be considered to improve the structural part and / or software part of the terminal.

In addition to the above attempts, the mobile terminal has recently been commercialized a wireless communication system using LTE communication technology, that is, 4G communication technology to provide a variety of services. In addition, in the future, it is expected that a wireless communication system using 5G communication technology will be commercialized to provide various services.

In this regard, synchronization between base stations is important between transmission and reception between 4G and 5G communications between a base station and a user equipment (UE) or transmission for 4G communications and reception for 5G communications. For example, the mobile terminal may perform a search for receiving a specific signal for 5G communication while the mobile terminal is transmitting according to 4G communication.

If the network-to-network synchronization is properly controlled, it can be operated reliably. However, the 5G network may not properly perform network synchronization, so it may not be able to determine the Tx / Rx cycle yet. In this case, the following problem occurs when performing physical downlink control channel (PDCCH) paging on a 5G network. That is, 5G may open a signal path of Rx with Rx turned on, and 4G LTE may transmit Tx.

On the other hand, in relation to the multiplexing scheme, frequency division duplex (FDD) separates the frequency bands of Tx and Rx and strongly suppresses the Tx frequency band from Rx in on the Rx signal path. However, the time division multiplexing (TDD: Frequency Division Duplex) has a problem in that a transmission signal is directly introduced through an Rx signal path because the Rx and Tx frequency bands are the same.

On the other hand, the mobile terminal uses a low noise amplifier (LNA) in series to improve reception sensitivity. ) May occur.

On the other hand, the problem that the power from the transmitting end flows into the receiving end is a big problem when the 4G communication band and the 5G communication band is the same or adjacent. For example, this problem occurs largely in the case of LTE re-farming in which the 5G communication band uses the 4G communication band.

In addition, the problem of introducing power from the transmitting end to the receiving end is more serious because it is impossible to control the 5G communication system from the 4G communication system or the 4G transceiver. In this regard, in 4G + 5G dual connection, there is a problem that the 4G communication system or 4G transceiver cannot control the state of individual communication components of the 5G communication system.

It is an object of the present invention to solve the above and other problems. Another object is to provide a mobile terminal which prevents system damage in a non-synchronized state between a first communication system and a second communication system.

Another object of the present invention is to provide a mobile terminal which prevents a decrease in reception performance of a second communication system due to interference of a transmission signal of the first communication system.

According to a mobile terminal of the present invention for achieving the above or another object, a transceiver configured to operate in a first communication system and a second communication system; A first antenna configured to transmit or receive a first signal of the first communication system; A second antenna configured to transmit or receive a second signal of the second communication system; And a signal attenuator module configured to provide signal attenuation for the first signal on a path between the second antenna and a low noise amplifier (LNA) of the second communication system. System damage can be prevented in a non-synchronized state between communication systems.

According to an embodiment, the frequency bands of the first signal and the second signal are the same, and the first communication system and the second communication system may transmit and receive time by time division duplex (TDD). Can be distinguished. In this case, while performing the network search through the second communication system while the first communication system transmits the first signal, the low noise amplifier may be in an on state.

According to an embodiment, the signal attenuator module may include: a first switch connected to the second antenna and having a first output port and a second output port; An attenuator coupled to the second output port of the first switch and configured to attenuate the first signal; And a second switch connected between the attenuator and the low noise amplifier (LNA) and having a first input port and a second input port.

According to an embodiment of the present disclosure, when the transceiver transmits a first control signal associated with bypass on to the signal attenuator module, the first switch and the second input port may be connected to each other. The second switch may be controlled and the first signal may be attenuated through the attenuator.

According to an embodiment of the present disclosure, when the transceiver transmits a second control signal associated with the bypass off to the signal attenuator module, the first switch and the first switch and the first output port may be connected to each other. The second switch may be controlled and the second signal may be input to the low noise amplifier (LNA) through a path between the first input port and the first output port.

According to one embodiment, the transceiver comprises: a first transceiver configured to operate in the first communication system; And a second transceiver configured to operate in the second communication system. At this time, when the first transceiver transmits a bypass control signal to the signal attenuator module, the first switch and the second switch are controlled to connect the second input port and the second output port, and the first switch is controlled. The signal can be attenuated through the attenuator.

According to an embodiment, the first antenna may include first to fourth radiating elements, and the first to fourth radiating elements may be connected to the first to fourth low noise amplifiers, respectively. In this case, the first transceiver may transmit a third control signal for controlling the first to fourth low noise amplifiers on / off to the first to fourth low noise amplifiers.

According to an embodiment, the second antenna may include fifth to eighth radiating elements, and the fifth to eighth radiating elements may be connected to fifth to eighth low noise amplifiers, respectively. In this case, the second transceiver may transmit a fourth control signal for controlling the fifth to eighth low noise amplifiers to be turned on / off to the fifth to eighth low noise amplifiers.

According to an embodiment, the low noise amplifier (LNA) is configured to provide signal attenuation for the first signal, and the low noise amplifier (LNA) is configured to provide a first path for amplifying the second signal and the first signal. A second path to attenuate may be provided. In this case, when the transceiver transmits a first control signal associated with a receive bypass on to the low noise amplifier LNA, the first signal may be attenuated through the second path.

According to an embodiment, the signal attenuator module may include: a first switch connected to the second antenna and having a first output port and a second output port; And a second switch connected between the first switch and the low noise amplifier (LNA) and having a first input port and a second input port. In this case, the first signal passing through the second output port may be attenuated through ground.

In order to achieve the above or another object, a mobile terminal according to another aspect of the present invention comprises: a transceiver configured to operate in a first communication system and a second communication system; An antenna configured to transmit or receive a first signal of the first communication system and to transmit or receive a second signal of the second communication system; And a signal attenuator module configured to provide signal attenuation for the first signal on a path between the low noise amplifier (LNA) and the transceiver of the second communication system.

According to an embodiment of the present disclosure, the antenna includes first to fourth radiating elements, and the first radiating element includes a first power amplifier and the first communication system and the second communication system operating in the first communication system. And a first low noise amplifier operating at. Meanwhile, the second radiating element and the third radiating element may be connected to second and third low noise amplifiers operating in the second communication system. The fourth radiating element may be connected to a second power amplifier operating in the second communication system and a fourth low noise amplifier operating in the first communication system and the second communication system.

According to an embodiment, the frequency bands of the first signal and the second signal are the same, and the first communication system and the second communication system may transmit and receive time by time division duplex (TDD). Can be distinguished. In this case, while performing the network search through the second communication system while the first communication system transmits the first signal, the low noise amplifier may be in an on state.

According to an embodiment, the signal attenuator module may include: a first switch connected to the low noise amplifier (LNA) and having a first output port and a second output port; An attenuator coupled to the second output port of the first switch and configured to attenuate the first signal; And a second switch connected between the attenuator and the transceiver and having a first input port and a second input port.

According to an embodiment of the present disclosure, when the transceiver transmits a first control signal associated with bypass on to the signal attenuator module, the first switch and the second input port may be connected to each other. The second switch may be controlled and the first signal may be attenuated through the attenuator.

Hereinafter, a method of preventing reception degradation in a multiple communication system according to the present invention and an effect of a mobile terminal performing the same will be described.

According to at least one of the embodiments of the present invention, a mobile terminal for providing a transmission signal attenuation in a low noise amplification receiving path of a second communication system to prevent system damage in a non-synchronized state between the first communication system and the second communication system. Can be provided.

In addition, according to at least one of the embodiments of the present invention, by providing a transmission signal attenuation in a different manner according to whether the transmission and reception separation structure, to prevent the degradation of the reception performance of the second communication system due to the interference of the transmission signal of the first communication system A mobile terminal can be provided.

Further scope of the applicability of the present invention will become apparent from the following detailed description. However, various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, and therefore, specific embodiments, such as the detailed description and the preferred embodiments of the present invention, should be understood as given by way of example only.

1A is a block diagram illustrating a mobile terminal related to the present invention.
1B and 1C are conceptual views of one example of a mobile terminal, viewed from different directions.
2 illustrates a mobile terminal for performing a system damage prevention method in a multiple communication system according to the present invention.
3 illustrates another embodiment of a mobile terminal for performing a method for preventing system damage in a multiple communication system according to the present invention.
4 is a diagram comparing the LNA bypass mode and the signal attenuator according to the present invention.
5 illustrates a structure of a mobile terminal having a multiple communication system including a common antenna according to an embodiment of the present invention.
6 illustrates a structure of a mobile terminal having a multiple communication system including a common antenna according to another embodiment of the present invention.
7 illustrates a structure of a mobile terminal having a multiple communication system including a common antenna according to another embodiment of the present invention.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, and the same or similar components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other. In addition, in describing the embodiments disclosed herein, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted. In addition, the accompanying drawings are intended to facilitate understanding of the embodiments disclosed herein, but are not limited to the technical spirit disclosed herein by the accompanying drawings, all changes included in the spirit and scope of the present invention. It should be understood to include equivalents and substitutes.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprises" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

The mobile terminal described herein includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant, a portable multimedia player, a navigation, a slate PC , Tablet PCs, ultrabooks, wearable devices, such as smartwatches, glass glasses, head mounted displays, and the like. have.

However, it will be readily apparent to those skilled in the art that the configuration according to the embodiments described herein may also be applied to fixed terminals such as digital TVs, desktop computers, digital signages, etc., except when applicable only to mobile terminals. will be.

1A to 1C, FIG. 1A is a block diagram illustrating a mobile terminal according to the present invention, and FIGS. 1B and 1C are conceptual views of one example of the mobile terminal, viewed from different directions.

The mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a controller 180, and a power supply unit 190. ) May be included. The components shown in FIG. 1A are not essential to implementing a mobile terminal, so that the mobile terminal described herein may have more or fewer components than those listed above.

More specifically, the wireless communication unit 110 of the components, between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or the mobile terminal 100 and the external server It may include one or more modules that enable wireless communication therebetween. In addition, the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.

The wireless communication unit 110 may include at least one of the broadcast receiving module 111, the mobile communication module 112, the wireless internet module 113, the short range communication module 114, and the location information module 115. .

The input unit 120 may include a camera 121 or an image input unit for inputting an image signal, a microphone 122 for inputting an audio signal, an audio input unit, or a user input unit 123 for receiving information from a user. , Touch keys, mechanical keys, and the like. The voice data or the image data collected by the input unit 120 may be analyzed and processed as a control command of the user.

The sensing unit 140 may include one or more sensors for sensing at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity. G-sensor, Gyroscope Sensor, Motion Sensor, RGB Sensor, Infrared Sensor, Infrared Sensor, Finger Scan Sensor, Ultrasonic Sensor Optical sensors (e.g. cameras 121), microphones (see 122), battery gauges, environmental sensors (e.g. barometers, hygrometers, thermometers, radiation detection sensors, Thermal sensors, gas sensors, etc.), chemical sensors (eg, electronic noses, healthcare sensors, biometric sensors, etc.). Meanwhile, the mobile terminal disclosed herein may use a combination of information sensed by at least two or more of these sensors.

The output unit 150 is for generating an output related to sight, hearing, or tactile sense, and includes at least one of the display unit 151, the audio output unit 152, the hap tip module 153, and the light output unit 154. can do. The display unit 151 forms a layer structure with or is integrally formed with the touch sensor, thereby implementing a touch screen. The touch screen may function as a user input unit 123 that provides an input interface between the mobile terminal 100 and the user, and may also provide an output interface between the mobile terminal 100 and the user.

The interface unit 160 serves as a path to various types of external devices connected to the mobile terminal 100. The interface unit 160 connects a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, and an identification module. It may include at least one of a port, an audio input / output (I / O) port, a video input / output (I / O) port, and an earphone port. In the mobile terminal 100, in response to an external device being connected to the interface unit 160, appropriate control associated with the connected external device may be performed.

In addition, the memory 170 stores data supporting various functions of the mobile terminal 100. The memory 170 may store a plurality of application programs or applications driven in the mobile terminal 100, data for operating the mobile terminal 100, and instructions. At least some of these applications may be downloaded from an external server via wireless communication. In addition, at least some of these application programs may exist on the mobile terminal 100 from the time of shipment for basic functions of the mobile terminal 100 (for example, a call forwarding, a calling function, a message receiving, and a calling function). The application program may be stored in the memory 170 and installed on the mobile terminal 100 to be driven by the controller 180 to perform an operation (or function) of the mobile terminal.

In addition to the operation related to the application program, the modem 180 typically controls the overall operation of the mobile terminal 100. The modem 180 may provide or process information or functions appropriate to a user by processing signals, data, information, and the like input or output through the above-described components, or by running an application program stored in the memory 170.

In addition, the modem 180 may control at least some of the components described with reference to FIG. 1A in order to drive an application program stored in the memory 170. Furthermore, the modem 180 may operate by combining at least two or more of the components included in the mobile terminal 100 to drive the application program.

The power supply unit 190 receives power from an external power source and an internal power source under the control of the modem 180 to supply power to each component included in the mobile terminal 100. The power supply unit 190 includes a battery, which may be a built-in battery or a replaceable battery.

At least some of the components may operate in cooperation with each other to implement an operation, control, or control method of the mobile terminal according to various embodiments described below. In addition, the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170.

1B and 1C, the disclosed mobile terminal 100 includes a terminal body in the form of a bar. However, the present invention is not limited thereto, and the present invention can be applied to various structures such as a watch type, a clip type, a glass type, or a folder type, a flip type, a slide type, a swing type, a swivel type, and two or more bodies which are coupled to be movable relative. . Although related to a particular type of mobile terminal, a description of a particular type of mobile terminal may generally apply to other types of mobile terminals.

Herein, the terminal body may be understood as a concept that refers to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an external appearance. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the internal space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.

The display unit 151 may be disposed in front of the terminal body to output information. As shown, the window 151a of the display unit 151 may be mounted to the front case 101 to form a front surface of the terminal body together with the front case 101.

The mobile terminal 100 includes a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, an optical output unit 154, and first and second units. The cameras 121a and 121b, the first and second manipulation units 123a and 123b, the microphone 122, the interface unit 160, and the like may be provided.

Hereinafter, as illustrated in FIGS. 1B and 1C, the display unit 151, the first sound output unit 152a, the proximity sensor 141, the illuminance sensor 142, and the light output unit may be disposed on the front surface of the terminal body. 154, the first camera 121a and the first manipulation unit 123a are disposed, and the second manipulation unit 123b, the microphone 122, and the interface unit 160 are disposed on the side of the terminal body. The mobile terminal 100 in which the second sound output unit 152b and the second camera 121b are disposed on the rear surface of the mobile terminal 100 will be described as an example.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as needed or disposed on other sides. For example, the first manipulation unit 123a may not be provided on the front surface of the terminal body, and the second sound output unit 152b may be provided on the side of the terminal body instead of the rear surface of the terminal body.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100 or user interface (UI) and graphical user interface (GUI) information according to the execution screen information. .

The display unit 151 may include a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible display). display, a 3D display, or an e-ink display.

In addition, two or more display units 151 may exist according to an implementation form of the mobile terminal 100. In this case, the plurality of display units may be spaced apart or integrally disposed on one surface of the mobile terminal 100, or may be disposed on different surfaces.

The display unit 151 may include a touch sensor that senses a touch on the display unit 151 so as to receive a control command by a touch method. Using this, when a touch is made to the display unit 151, the touch sensor may sense the touch, and the modem 180 may generate a control command corresponding to the touch based on the touch sensor. The content input by the touch method may be letters or numbers or menu items that can be indicated or designated in various modes.

The first sound output unit 152a may be implemented as a receiver for transmitting a call sound to the user's ear, and the second sound output unit 152b may include a loud speaker for outputting various alarm sounds or multimedia reproduction sounds. It can be implemented in the form of).

A sound hole for emitting sound generated from the first sound output unit 152a may be formed in the window 151a of the display unit 151. However, the present invention is not limited thereto, and the sound may be configured to be emitted along an assembly gap between the structures (for example, a gap between the window 151a and the front case 101). In this case, an externally formed hole may be invisible or hidden for sound output, thereby simplifying the appearance of the mobile terminal 100.

The light output unit 154 is configured to output light for notifying when an event occurs. Examples of the event may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like. When the user's event confirmation is detected, the modem 180 may control the light output unit 154 to terminate the output of the light.

The first camera 121a processes an image frame of a still image or a moving image obtained by the image sensor in a shooting mode or a video call mode. The processed image frame may be displayed on the display unit 151 and stored in the memory 170.

The first and second manipulation units 123a and 123b may be collectively referred to as a manipulating portion as an example of the user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100. have. The first and second manipulation units 123a and 123b may be adopted in any manner as long as the user is tactile manner such as touch, push, scroll, and the like while the user is tactile. In addition, the first and second manipulation units 123a and 123b may be employed in such a manner that the first and second manipulation units 123a and 123b are operated without a tactile feeling by the user through proximity touch, hovering touch, or the like.

In the drawing, the first manipulation unit 123a is illustrated as being a touch key, but the present invention is not limited thereto. For example, the first manipulation unit 123a may be a push key or a combination of a touch key and a push key.

The contents input by the first and second manipulation units 123a and 123b may be variously set. For example, the first operation unit 123a receives a command such as a menu, a home key, a cancellation, a search, and the like, and the second operation unit 123b is output from the first or second sound output units 152a and 152b. The user may receive a command such as adjusting the volume of the sound and switching to the touch recognition mode of the display unit 151.

As described above, with reference to the wireless communication unit 110, that is, the mobile communication module 111 and the wireless Internet module 112, a method of preventing system damage in a multi-communication system and a mobile terminal 100 performing the same will now be described. Same as Here, in the multi-communication system architecture, the transceiver, the power amplifier (PA) and the low noise amplifier (LNA) in the wireless communication unit 110 interact with the control unit 180 and the power supply unit 190 managing the same. do.

Hereinafter, a method for preventing system damage in a multiple communication system according to the present invention and embodiments related to a mobile terminal performing the same will be described with reference to the accompanying drawings. It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention.

2 illustrates a mobile terminal for performing a system damage prevention method in a multiple communication system according to the present invention. Referring to FIG. 2, the mobile terminal 1000 includes a first transceiver 211, a second transceiver 212, a first antenna 221, a second antenna 222, a first power amplifier 231, and a second. A power amplifier 232, a first low noise amplifier 241, a second low noise amplifier 242, and a signal attenuator module 250 are included.

On the other hand, Figure 3 shows another embodiment of a mobile terminal for performing a system damage prevention method in a multi-communication system according to the present invention. Referring to FIG. 3, the mobile terminal 1000 includes a transceiver 210, a first antenna 221, a second antenna 222, a first power amplifier 231, a second power amplifier 232, and a first low noise. An amplifier 241, a second low noise amplifier 242, and a signal attenuator module 250. Accordingly, in FIG. 3, unlike the FIG. 2, the first transceiver 211 and the second transceiver 212 are replaced with one transceiver 210. Here, one transceiver 210 may be referred to as an integrated transceiver 210. Accordingly, control of individual communication components in the 4G and 5G communication systems may be performed in the integrated transceiver 210.

Meanwhile, in FIG. 3, the Tx output from the first antenna 221 may be input to each second low noise amplifier 242 through the second antenna 222. In this case, the power input from the first antenna 221 reaches the second low noise amplifier 242, whereby some of the second low noise amplifier 242 exceeds the LNA maximum power input. In this regard, when the isolation between the first and second antennas 221 and 222 of the second low noise amplifier 242 is not good, the LNA maximum power input is exceeded as described above.

In the first communication system as in the 4G LTE system, even in the case of TDD, switching of the Tx and the RX is performed in one system, so this problem does not occur. However, as in the present invention, in the dual connectivity structure of 4G + 5G, this LNA maximum power input problem occurs. On the other hand, in TDD where the frequency bands of Tx and Rx are the same, signals of the Tx band cannot be filtered by the Rx filter.

On the other hand, in the case of FDD in the first communication system as in the 4G LTE system, the Rx system is turned on while the output of Tx enters the Rx antenna, but the above-described problem does not occur. This is because the frequency bands of Tx and Rx are different in the case of FDD, and the signal of the Tx band is removed when passing through the Rx filter.

Meanwhile, referring to FIG. 3, the first transceiver 211 and the second transceiver 212 may be referred to as one transceiver 210. Meanwhile, one of the first low noise amplifier 241 and the second low noise amplifier 242 may be referred to as a low noise amplifier 240. In the present invention, the influence on the receiver of the second communication system by transmitting the first signal of the first communication system is examined. Thus, low noise amplifier 240 may refer to second low noise amplifier 242 of the second communication system.

The transceiver 100 is configured to operate in a first communication system and a second communication system. On the other hand, the first antenna 221 is configured to transmit or receive the first signal of the first communication system. In addition, the second antenna 231 is configured to transmit or receive a second signal of the second communication system. Here, the first communication system and the second communication system may be a 4G communication system and a 5G communication system, respectively.

In this case, in order to support LTE relocation between 4G communication and 5G communication, the frequency bands of the first signal and the second signal may be configured to be the same. Meanwhile, in the first communication system and the second communication system, transmission and reception times may be divided by time division duplex (TDD). In this regard, while the first communication system transmits the first signal, the low noise amplifier 242 may be on to perform a network search through the second communication system.

Meanwhile, the signal attenuator module 250 may include a first switch 251, an attenuator 252, and a second switch 253. In this case, the first switch 251 may be connected to the second antenna 222 and may include a first output port and a second output port. Meanwhile, the attenuator 252 is connected to the second output port of the first switch 251 and can be configured to attenuate the first signal. In addition, the second switch 253 may be connected between the attenuator 252 and the low noise amplifier 242, and may include a first input port and a second input port.

Meanwhile, the signal attenuator module 250 is configured to provide signal attenuation for the first signal on the path between the second antenna 231 and the low noise amplifier 242 of the second communication system.

Meanwhile, the bypass on / off control in the integrated transceiver 210 or the first transceiver 211 will be described as follows. At this time, the input to the first antenna 221 is the same, but the signal is input to the second low noise amplifier 242 through the bypass path. In this manner, since the system gain is not set to a large value in the bypass state, a high maximum power input level to the second communication system is not a problem.

In this regard, the generation and transmission of the bypass on control signal for reducing the influence on the receiving end of the 5G communication system as the first signal of the 4G communication system is transmitted are as follows. In this regard, when the transceiver 210 transmits a first control signal associated with bypass on to the signal attenuator module 250, the first switch 251 and the second output port are connected so that the second input port and the second output port are connected. The switch 253 is controlled. Accordingly, the first signal of the 4G communication system may be attenuated through the attenuator 252, and damage to the second low noise amplifier 242 by the first signal may be avoided.

Next, the bypass off control is performed when the reception through the 5G communication system is not necessary or when there is no influence on the receiving end of the 5G communication system according to the transmission in the 4G communication system. That is, when there is no influence on the receiving end of the 5G communication system, the 5G reception performance may be maximized through the bypass off control.

In this regard, when the transceiver sends a second control signal associated with the bypass off to the signal attenuator module, the first switch 251 and the second switch 253 control such that the first input port and the first output port are connected. do. Accordingly, the second signal may be input to the low noise amplifier 242 through the path between the first input port and the first output port. At this time, the reception level of the first signal of the 4G communication system received through the low noise amplifier 242 is much lower than the reception level of the second signal. Therefore, no degradation in reception performance of the 5G communication system due to the first signal of the 4G communication system occurs.

Meanwhile, referring to FIG. 2, the transceiver separation structure according to the present invention will be described. In the following, the description of the same configuration is replaced with the description in FIG.

Meanwhile, referring to FIG. 2, the first transceiver 211 is configured to operate in the first communication system. In addition, the second transceiver 212 is configured to operate in a second communication system. In this case, the above-described bypass on / off signal transmission may be performed through the first transceiver 211. Meanwhile, specific control for the communication operation in the second communication system may be performed by the second transceiver 212. For example, operations such as turning on / off the second low noise amplifier 242 may be performed by the second transceiver 212.

Accordingly, the first transceiver 211 may not perform an operation such as turning on / off the second low noise amplifier 242 of the second communication system while transmitting to the base station using the first communication system. However, according to the present invention, the first transceiver 211 may control the signal attenuator 250 to prevent damage to the second low noise amplifier 242 even during transmission to the base station using the first communication system. have.

In detail, when the first transceiver 211 transmits a bypass control signal to the signal attenuator module 250, the first switch 251 and the second switch 253 are connected to the second input port and the second output port. Is controlled. Accordingly, the first signal of the 4G communication system may be attenuated through the attenuator 252, and damage to the second low noise amplifier 242 by the first signal may be avoided.

Accordingly, by using the signal attenuator module 250, a bypass path setting that suppresses the input power to the extent that there is no damage to the second low noise amplifier 242 through switching in the same manner as the LNA bypass sequence is possible. According to the present invention, this bypass path setting may be implemented to control in the first transceiver 2111 corresponding to the 4G modem or the 4G transceiver.

Meanwhile, the first communication system may perform 4 × 4 multi-input / output (MIMO) with the first base station through the mobile terminal 1000. Meanwhile, the first communication system may perform 4 × 4 multiple input / output (MIMO) with the second base station through the mobile terminal 100.

In this regard, referring to FIGS. 2 and 3, the first antenna 221 includes first to fourth radiating elements, and the first to fourth radiating elements are first to fourth, respectively. It is connected to a low noise amplifier. In this case, referring to FIG. 2, the first transceiver 211 may transmit a third control signal for controlling the first to fourth low noise amplifiers to be turned on / off to the first to fourth low noise amplifiers.

Meanwhile, the second antenna includes fifth to eighth radiating elements, and the fifth to eighth antennas are respectively connected to fifth to eighth low noise amplifiers. In this case, referring to FIG. 2, the second transceiver 212 may transmit a fourth control signal for controlling the fifth to eighth low noise amplifiers to the fifth to eighth low noise amplifiers.

Meanwhile, the LNA itself may support the bypass mode instead of or in conjunction with the signal attenuator 250 in FIGS. 2 and 3. In this regard, Figure 4 is a diagram comparing the LNA bypass mode and the signal attenuator according to the present invention.

In this regard, a method for synchronizing the switch between 5G-4G (SW) in the modem as shown in Table 1 can be implemented.

SW Control B41 RX B41 TX n41 RX n41 TX DC @ Rx on off on off DC @ Tx off on off on LTE-Rx & NR-Searching on off on off LTE-Tx & NR-Searching off on off off

In this case, there may be a limit in preventing system damage in all cases that occur due to accidental network conditions when the switch SW is applied. Thus, the LNA, which can cause problems, can be bypassed or switched to an attenuation path to protect the system from damage. In this case, the sequence may be implemented to be used in the case of transmission (Tx) of the first communication system, that is, B41 (LTE). At the modem, however, there may be a moment when the 4G output is crossed, causing system damage. Therefore, a method of bypassing a signal path of a second communication system corresponding to 5G in the first communication system corresponding to 4G should be controlled.

Meanwhile, referring to FIG. 4A, the second low noise amplifier 242 may use the bypass mode or the high voltage according to a combination of a low voltage or a high voltage through the control terminals GPI01 and GPI02. It can operate in high gain mode. In this case, the first input port and the first output port for amplifying the 5G received signal correspond to and RFout.

Referring to FIG. 4A, the low noise amplifier 242 is configured to provide a signal attenuation for the first signal, and the low noise amplifier 242 provides a first path for amplifying a second signal and the first signal. And a second path to attenuate. Here, the first path is a path corresponding to the first input port RFin and the first output port RFout, while the second path is a path between the first input port RFin and the ground GND. In this case, the first signal, which is a transmission signal of the first communication system, may be attenuated through ground.

Meanwhile, referring to FIG. 4B, the second low noise amplifier 242 is connected to the signal attenuator module 250 and the filter. Accordingly, as described above, the first signal, which is a transmission signal of the first communication system, is attenuated through the attenuator 252 and transferred to the second low noise amplifier 242, thereby preventing damage to the second low noise amplifier 242. . On the other hand, the second signal, which is the received signal of the second communication system, is transmitted through a path other than the attenuator 252 and is low noise amplified by the second low noise amplifier 242.

Meanwhile, the signal attenuator module 250 may be provided with a first switch 251 and a second switch 253 without the attenuator 252. In this case, the first switch 251 is connected to the second antenna 212 and has a first output port and a second output port. On the other hand, the second switch 253 is connected between the first switch 251 and the low noise amplifier 242 and has a first input port and a second input port. Meanwhile, the first signal passing through the second output port may be attenuated through the ground.

Meanwhile, the mobile terminal performing the system damage prevention method in the multi-communication system according to the present invention may be implemented through a common antenna. In this regard, FIG. 5 illustrates a structure of a mobile terminal having a multiple communication system including a common antenna according to an embodiment of the present invention. Referring to FIG. 5, the mobile terminal 100 includes a transceiver 210, an antenna 220, and a signal attenuator module 250.

At this time, the transceiver 210 is configured to operate in the first communication system and the second communication system. Meanwhile, the transceiver 210 may include a first transceiver 211 and a second transceiver 212 as shown in FIG. 2. At this time, the first transceiver 211 is configured to operate in the first communication system, while the second transceiver 212 is configured to operate in the second communication system.

On the other hand, the antenna 220 is configured to transmit or receive a first signal of the first communication system, and to transmit or receive a second signal of the second communication system. In this case, the antenna 220 may include a plurality of radiating elements, some of which may operate as a common antenna.

In an embodiment, the first radiating element 225-1 may operate in a transmission / reception mode. In this case, the first radiating element 225-1 may support a transmission mode of the first communication system. Accordingly, the first radiating element 225-1 is connected to the first power amplifier 231 operating in the first communication system and the first low noise amplifier 245-1 operating in the first communication system and the second communication system. Can be connected.

Meanwhile, the second radiating element 225-2 and the third radiating element 225-3 may operate only in a reception mode. Accordingly, the second radiating element 225-2 and the third radiating element 225-3 may be connected to the second and third low noise amplifiers 245-2 and 245-3 operating in the second communication system. .

The fourth radiating element 225-4 may operate in a transmission / reception mode. In this case, the fourth radiating element 225-4 may support the transmission mode of the second communication system. The fourth radiating element 225-4 is connected to a second power amplifier 232 operating in the second communication system and a fourth low noise amplifier 245-4 operating in the first communication system and the second communication system.

Meanwhile, the signal attenuator module 250 ′ is configured to provide signal attenuation for the first signal on the path between the low noise amplifiers 245-1, 245-4 and the transceiver 210 of the second communication system. Meanwhile, the signal attenuator module 250 may be configured to provide signal attenuation for the first signal on a path between the antenna 220 and the low noise amplifiers 245-2 and 245-3 of the second communication system.

As such, when the antenna channel operates in the transmission / reception mode, the signal attenuator module 250 ′ may be disposed between the low noise amplifiers 245-1 and 245-4 and the transceiver 210 to maintain the quality of the transmission signal. Can be. On the other hand, when the antenna channel operates only in the reception mode, the signal attenuator module 250 may be disposed between the antenna 220 and the low noise amplifiers 245-2 and 245-3.

In this case, the combination of the number of antennas 220 and support of the transmission / reception mode or the reception mode may be freely changed according to an application. In this regard, FIG. 6 illustrates a structure of a mobile terminal having a multiple communication system including a common antenna according to another embodiment of the present invention. Referring to FIG. 6, the mobile terminal 100 includes first and second transceivers 211 and 212, a first antenna 221, an antenna 225, and first to fifth low noise amplifiers 246-1 to 246-. 5) is included. Here, the antenna 225 is configured to operate in multiple systems, ie first and second communication systems. Antenna 225 includes a plurality of radiating elements, which can operate as a common antenna.

Here, the first antenna 221 is configured to transmit or receive a first signal of the first communication system, while the antenna 225 transmits or receives a first signal of the first communication system, and 2 is configured to transmit or receive a second signal of the communication system. In this case, the antenna 225 includes first to fourth radiating elements 225-1 to 225-4.

Referring to FIG. 6, when the antenna is commonly used, such as the first radiating element 225-1, at a receiving end, a second low noise amplifier 246-2, which is a common LNA, may be used. have. Here, "public" means that it is configured to operate in both the first and second communication systems.

Meanwhile, the second to fifth low noise amplifiers 246-2 to 246-5 are configured to low noise amplify the first signal of the first communication system and the second signal of the second communication system. Meanwhile, in order to prevent system damage caused by the first signal coupled from the first antenna 221 to the antenna 225, the second to fifth low noise amplifiers 246-2 to 246-5 are illustrated in FIG. 4A. Self-bias circuits, such as).

The second to fifth low noise amplifiers 246-2 to 246-5 are configured to provide signal attenuation for the first signal. Meanwhile, the second to fifth low noise amplifiers 246-2 to 246-5 have a first path that amplifies the second signal and a second path that attenuates the first signal. At this time, when the first transceiver 211 transmits the first control signal associated with the receive bypass on to the second to fifth low noise amplifiers 246-2 to 246-5, the first signal is attenuated through the second path. do. Alternatively, the first signal flowing into the second to fifth low noise amplifiers 246-2 to 246-5 may be attenuated through ground.

In addition, damage to the rear end LNA connected to the rear ends of the second to fifth low noise amplifiers 246-2 to 246-5 is as follows. In the first communication system corresponding to 4G, the Tx output is increased to the high output level via the first power amplifier 231 and radiated through the first antenna 221. In this case, the Tx output radiated to the first radiating element 225-1 adjacent to the first antenna 221 may be coupled. At this time, the power input to the first radiating element 225-1 is amplified by the second low noise amplifier 246-2. At this time, the amplified signal flows into the rear LNA 246 ′ connected to the second low noise amplifier 246-2. Meanwhile, the power value introduced into the rear LNA 246 ′ may be a value exceeding the input limit power.

On the other hand, the antenna 220 is configured to transmit or receive a first signal of the first communication system, and to transmit or receive a second signal of the second communication system. At this time, the antenna 220 includes a plurality of radiating elements, they may operate as a common antenna.

In an embodiment, the first to fourth radiating elements 225-1 to 225-4 may operate in a reception mode or a transmission / reception mode. In this case, the first to third radiating elements 225-1 to 225-3 may support reception modes of the first and second communication systems. In this case, the first to third radiating elements 225-1 to 225-3 may be connected to the second to fourth low noise amplifiers 246-2 to 246-4. Here, the second to fourth low noise amplifiers 246-2 to 246-4 are configured to low noise amplify the first signal of the first communication system and the second signal of the second communication system.

The fourth radiating element 225-4 may operate in a transmission / reception mode of the second communication system. In this case, the fourth radiating element 225-4 may be connected to the fifth low noise amplifier 246-5. Here, the fifth low noise amplifier 246-5 is configured to low noise amplify the second signal of the second communication system.

Accordingly, the input to the first antenna 221 is the same as in other cases, but the strength of the input signal is not amplified in the second low noise amplifier 246-2, and a loss due to the bypass mode occurs. In addition, the insertion loss in the filter further reduces the strength of the input signal. Meanwhile, the signal level flowing into the rear LNA 246 ′ may be stably maintained below the maximum power input level.

The second through fourth low noise amplifiers 246-2 through 246-4 that are "public" LNAs can operate in either 5G or 4G communication systems, but bypass control is controlled by the first transceiver 211, which is a 4G transceiver.

Meanwhile, according to another embodiment of the present invention, a signal attenuator may be used in the structure of a mobile terminal having a multiple communication system including a common antenna. In this regard, FIG. 7 illustrates a structure of a mobile terminal having a multiple communication system including a common antenna according to another embodiment of the present invention. Referring to FIG. 7, the mobile terminal 100 includes a transceiver 210, a first antenna 221, an antenna 225, and first to fifth low noise amplifiers 247-1 to 247-5. Here, the antenna 225 is configured to operate in multiple systems, ie first and second communication systems. Antenna 225 includes a plurality of radiating elements, which can operate as a common antenna.

Here, the first antenna 221 is configured to transmit or receive a first signal of the first communication system, while the antenna 225 transmits or receives a first signal of the first communication system, and 2 is configured to transmit or receive a second signal of the communication system.

In an embodiment, the first to fourth radiating elements 225-1 to 225-4 may operate in a reception mode or a transmission / reception mode. In this case, the first to third radiating elements 225-1 to 225-3 may support reception modes of the first and second communication systems. In this case, the first to third radiating elements 225-1 to 225-3 may be connected to the second to fourth low noise amplifiers 247-2 to 247-4. Here, the second to fourth low noise amplifiers 247-2 to 247-4 are configured to low noise amplify the first signal of the first communication system and the second signal of the second communication system.

The fourth radiating element 225-4 may operate in a transmission / reception mode of the second communication system. In this case, the fourth radiating element 225-4 may be connected to the fifth low noise amplifier 247-5. Here, the fifth low noise amplifier 246-5 is configured to low noise amplify the second signal of the second communication system.

Meanwhile, the second to fifth low noise amplifiers 247-2 to 247-5 are configured to low noise amplify the first signal of the first communication system and the second signal of the second communication system. Meanwhile, in order to prevent damage to the system due to the first signal coupled from the first antenna 221 to the antenna 225, the second to fifth low noise amplifiers 247-2 to 247-5 are illustrated in FIG. 4B. Signal attenuator 250,

Meanwhile, the signal attenuator module 250 may be configured to provide signal attenuation for the first signal on a path between the antenna 220 and the second to fifth low noise amplifiers 247-2 to 247-5.

On the other hand, the signal attenuator module 250 connected to the fourth radiating element 225-4 is formed on the path between the low noise amplifiers 245-1 and 245-4 and the transceiver 210 of the second communication system as shown in FIG. 6. It can be configured to provide signal attenuation for one signal. However, in order to prevent receiving end damage of the second communication system, signal attenuation for the first signal on the path between the antenna 220 and the second to fifth low noise amplifiers 247-2 to 247-5 as shown in FIG. 7. It can be configured to provide.

Meanwhile, in the multi-communication system of FIGS. 5 to 7, frequency bands of the first signal of the first communication system and the second signal of the second communication system may be identically configured. Accordingly, LTE re-farming may be performed using a second communication system that provides 5G communication service.

Meanwhile, in the multiple communication systems of FIGS. 5 to 7, the first communication system and the second communication system may be divided into transmission and reception times by time division duplex (TDD). In this case, while the first communication system transmits the first signal, the low noise amplifier may be in an on state to perform a network search through the second communication system.

Meanwhile, the signal attenuator module 250 ′ in FIG. 5 may include a first switch 251 ′, an attenuator 252, and a second switch 253. In this case, the first switch 251 ′ is connected to the low noise amplifiers 245-2 and 245-3 and includes a first output port and a second output port. Meanwhile, the attenuator 252 'is connected to the second output port of the first switch 251' and is configured to attenuate the first signal. In addition, the second switch 253 'is connected between the attenuator 252' and the transceiver 210, and has a first input port and a second input port.

Meanwhile, when the transceiver 210 transmits a first control signal associated with bypass on to the signal attenuator modules 250 and 250 ′, the first switches 251 and 251 are connected to connect the second input port and the second output port. 'And the second switches 252 and 252' are controlled, and the first signal can be attenuated through the attenuator 252 '.

In the above, a method for preventing damage to a receiving end of a second communication system by a transmission signal of a first communication system in various multi-communication system structures according to the present invention and a mobile terminal performing the same have been described.

Hereinafter, a method of preventing reception degradation in a multiple communication system according to the present invention and an effect of a mobile terminal performing the same will be described.

According to at least one of the embodiments of the present invention, a mobile terminal for providing a transmission signal attenuation in a low noise amplification receiving path of a second communication system to prevent system damage in a non-synchronized state between the first communication system and the second communication system. Can be provided.

In addition, according to at least one of the embodiments of the present invention, by providing a transmission signal attenuation in a different manner according to whether the transmission and reception separation structure, to prevent the degradation of the reception performance of the second communication system due to the interference of the transmission signal of the first communication system A mobile terminal can be provided.

Further scope of the applicability of the present invention will become apparent from the following detailed description. However, various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, and therefore, specific embodiments, such as the detailed description and the preferred embodiments of the present invention, should be understood as given by way of example only.

In connection with the present invention described above, the design and the driving thereof for preventing the degradation of reception performance between different communication systems and the prevention of system damage can be implemented as computer readable codes on a medium in which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include hard disk drives (HDDs), solid state disks (SSDs), silicon disk drives (SDDs), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like. This also includes implementations in the form of carrier waves (eg, transmission over the Internet). In addition, the computer may include the controller 180 of the terminal. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims (15)

In a mobile terminal,
A transceiver configured to operate in a first communication system and a second communication system;
A first antenna configured to transmit or receive a first signal of the first communication system;
A second antenna configured to transmit or receive a second signal of the second communication system;
And a signal attenuator module configured to provide signal attenuation for the first signal on a path between the second antenna and a low noise amplifier (LNA) of the second communication system. The method of claim 1,
The frequency band of the first signal and the second signal is the same,
In the first communication system and the second communication system, transmission and reception times are divided by time division duplex (TDD),
And the low noise amplifier is on in order to perform a network search through the second communication system while the first communication system transmits the first signal. . The method of claim 1,
The signal attenuator module,
A first switch connected to the second antenna and having a first output port and a second output port;
An attenuator coupled to the second output port of the first switch and configured to attenuate the first signal; And
And a second switch coupled between the attenuator and the low noise amplifier (LNA), the second switch having a first input port and a second input port. The method of claim 3,
When the transceiver transmits a first control signal associated with bypass on to the signal attenuator module, the first switch and the second switch are controlled to connect the second input port and the second output port. And the first signal is attenuated through the attenuator. The method of claim 3,
When the transceiver transmits a second control signal associated with the bypass off to the signal attenuator module, the first switch and the second switch are controlled such that the first input port and the first output port are connected. And the second signal is input to the low noise amplifier (LNA) through a path between the first input port and the first output port. The method of claim 3,
The transceiver,
A first transceiver configured to operate in the first communication system; And
A second transceiver configured to operate in the second communication system,
When the first transceiver transmits a bypass control signal to the signal attenuator module, the first switch and the second switch are controlled so that the second input port and the second output port are connected, and the first signal is And attenuates through the attenuator. The method of claim 1,
The transceiver,
A first transceiver configured to operate in the first communication system; And
A second transceiver configured to operate in the second communication system,
The first antenna comprises first to fourth radiating elements, each of the first to fourth radiating elements being connected to a first to fourth low noise amplifier,
And the first transceiver transmits a third control signal to the first to fourth low noise amplifiers for controlling the first to fourth low noise amplifiers on / off. The method of claim 7, wherein
The second antenna includes fifth to eighth radiating elements, and the fifth to eighth radiating elements are respectively connected to fifth to eighth low noise amplifiers,
And the second transceiver transmits a fourth control signal to the fifth to eighth low noise amplifiers to control the fifth to eighth low noise amplifiers on / off. The method of claim 1,
The low noise amplifier (LNA) is configured to provide signal attenuation for the first signal, and the low noise amplifier (LNA) comprises a first path for amplifying the second signal and a second path for attenuating the first signal. Equipped,
And when the transceiver transmits a first control signal associated with receive bypass on to the low noise amplifier (LNA), the first signal is attenuated through the second path. The method of claim 1,
The signal attenuator module,
A first switch connected to the second antenna and having a first output port and a second output port; And
A second switch connected between the first switch and the low noise amplifier (LNA) and having a first input port and a second input port;
And the first signal passing through the second output port is attenuated through ground. In a mobile terminal,
A transceiver configured to operate in a first communication system and a second communication system;
An antenna configured to transmit or receive a first signal of the first communication system and to transmit or receive a second signal of the second communication system;
And a signal attenuator module configured to provide signal attenuation for the first signal on a path between the low noise amplifier (LNA) and the transceiver of the second communication system. The method of claim 11,
The antenna includes first to fourth radiating elements,
The first radiating element is connected to a first power amplifier operating in the first communication system and a first low noise amplifier operating in the first communication system and the second communication system,
The second radiating element and the third radiating element are connected to second and third low noise amplifiers operating in the second communication system,
And the fourth radiating element is coupled to a second power amplifier operating in the second communication system and a fourth low noise amplifier operating in the first communication system and the second communication system. The method of claim 11,
The frequency band of the first signal and the second signal is the same,
In the first communication system and the second communication system, transmission and reception times are divided by time division duplex (TDD),
And the low noise amplifier is on in order to perform a network search through the second communication system while the first communication system transmits the first signal. . The method of claim 11,
The signal attenuator module,
A first switch connected to the low noise amplifier (LNA) and having a first output port and a second output port;
An attenuator coupled to the second output port of the first switch and configured to attenuate the first signal; And
A second switch coupled between the attenuator and the transceiver, the second switch having a first input port and a second input port. The method of claim 14,
When the transceiver transmits a first control signal associated with bypass on to the signal attenuator module, the first switch and the second switch are controlled to connect the second input port and the second output port. And the first signal is attenuated through the attenuator.

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