CN108390135B - Microstrip duplexer - Google Patents
Microstrip duplexer Download PDFInfo
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- CN108390135B CN108390135B CN201810364290.6A CN201810364290A CN108390135B CN 108390135 B CN108390135 B CN 108390135B CN 201810364290 A CN201810364290 A CN 201810364290A CN 108390135 B CN108390135 B CN 108390135B
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- 230000008878 coupling Effects 0.000 claims abstract description 57
- 238000010168 coupling process Methods 0.000 claims abstract description 57
- 238000005859 coupling reaction Methods 0.000 claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 37
- 230000008054 signal transmission Effects 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 239000004020 conductor Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 description 8
- 238000002955 isolation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
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Abstract
A microstrip duplexer comprises a dielectric substrate and a metal grounding layer, wherein the metal grounding layer covers one side of the dielectric substrate, a strip-shaped metal layer is attached to the other side of the dielectric substrate and forms a signal transmission coupling channel, a first frequency filter and a second frequency filter are connected to the strip-shaped metal, a third frequency coupling filter and a fourth frequency coupling filter are arranged on the side face of the strip-shaped metal layer, and the first frequency, the second frequency, the third frequency and the fourth frequency are four different frequencies. The first frequency filter and the second frequency filter are connected for transmitting signals, and the third frequency coupling filter and the fourth frequency coupling filter are used for receiving signals. When the signal frequency of each filter works, other filters do not respond to the signal, so that the signals are effectively isolated from each other, a pair of antennas can be shared, independent antennas do not need to be arranged for each frequency, and the size, the weight and the cost of the whole equipment are reduced.
Description
Technical Field
The invention relates to the field of communication and radar, in particular to the field of harmonic radar.
Background
The traditional communication and radar devices adopt the same antenna for signal transmission and reception, and a duplexer is needed. In addition to efficient transmission of transmit and receive signals, a more important role of the duplexer is to effectively isolate the transceiver devices to prevent transmit energy from directly entering the receiver and burning the receiver. The working principle is shown in figure 1. When the transmitting signal includes a plurality of frequencies and the receiving signal also includes a plurality of frequencies, i.e. the transmitting and receiving signal is multipath, in the prior art, the duplexer cannot realize the isolation of multipath transmitting and receiving signals, only a plurality of antennas can be adopted, and the signal of each frequency respectively uses an independent antenna, which causes the increase of the volume, weight and cost of the whole equipment.
Disclosure of Invention
The invention aims to provide a microstrip duplexer, which aims to solve the technical problem that the duplexer in the prior art cannot realize multipath receiving-signaling isolation.
The microstrip duplexer comprises a dielectric substrate and a metal grounding layer, wherein the metal grounding layer covers one side of the dielectric substrate, wherein, the other side of the dielectric substrate is provided with a signal transmission coupling channel which is composed of a strip-shaped metal layer attached on the dielectric substrate, the two ends of the strip-shaped metal layer are provided with antenna connection ports, the strip-shaped metal layer is connected with a first frequency filter and a second frequency filter, the side surface of the strip-shaped metal layer is provided with a third frequency coupling filter and a fourth frequency coupling filter, the third frequency coupling filter and the fourth frequency coupling filter respectively comprise a receiving signal output end, the first frequency and the second frequency are two frequencies for transmitting signals, and the third frequency and the fourth frequency are two frequencies for receiving signals.
Furthermore, the strip-shaped metal layer is represented as a ring with a break gap on the dielectric substrate, the break gap is connected with the antenna, and the ring is in a shape of a circle, an ellipse, a rectangle, a rounded rectangle, or a shape similar to a circle, an ellipse, a rectangle, or a rounded rectangle.
Further, the first frequency filter and the second frequency filter each include two or more linear conductor patches spaced apart from each other in parallel, and one end of one conductor patch is connected to the strip metal layer.
Furthermore, each of the third frequency coupling filter and the fourth frequency coupling filter includes a first microstrip feeder line, a second microstrip feeder line and a third microstrip feeder line, the second microstrip feeder line is linear, each of the first microstrip feeder line and the third microstrip feeder line includes a linear portion spaced in parallel with the second microstrip feeder line, one end of the linear portion of the first microstrip feeder line is further connected with an extension portion, the extension portion is adjacent to the strip-shaped metal layer and spaced in parallel or approximately spaced in parallel, and one end of the third microstrip feeder line is provided with a received signal output port.
Further, the dielectric substrate is FR4 or a PTFE dielectric substrate.
The working principle of the invention is as follows: the strip metal layer is a signal transmission coupling channel, and the impedance of the strip metal layer is effectively matched with the antenna. The impedance of the first frequency filter is matched to the first frequency transmitter and the signal transmission coupling channel for the first frequency f1And (6) filtering. The impedance of the second frequency filter is matched to the second frequency transmitter and signal transmission coupling channel for the second frequency f2And (6) filtering. First frequency f1And a second frequency f2Are two different frequencies. Third stepThe frequency coupling filter is matched with the third frequency receiver and the signal transmission coupling channel and is used for the third frequency f3And (6) filtering. A fourth frequency coupling filter matched to the fourth frequency receiver and the signal transmission coupling path for the fourth frequency f4And (6) filtering. First frequency f1A second frequency f2A third frequency f3And a fourth frequency f4Are four different frequencies. The transmitter transmits a first frequency f1When the signal passes through the first frequency filter, the signal basically passes through without loss and enters and is transmitted through the signal transmission coupling channel, and the rest of the second frequency filter, the third frequency coupling filter and the fourth frequency coupling filter have the first frequency f1The signals are not responded, and effective isolation between the signals is realized. The transmitter transmits the second frequency f2When the signal is transmitted, its working principle and first frequency f1The same signal is used. Receiving the third frequency f by the antenna3Is coupled to the third frequency coupling filter via the signal transmission coupling channel and responds thereto, the third frequency coupling filter transmitting the received signal to the third frequency receiver. Receiving the fourth frequency f by the antenna4When the signal is received, the working principle and the third frequency f of the receiving and transmitting are carried out3The same signal is used.
Compared with the prior art, the invention has positive and obvious effect. The medium substrate is provided with the signal transmission coupling channel, the signal transmission coupling channel is connected with the filter for transmitting signals, the signal transmission coupling channel is coupled with the filter for receiving signals, each filter corresponds to a frequency, when each filter works, other filters do not respond to the signals, effective isolation between the filters is realized, a pair of antennas can be shared, independent antennas do not need to be arranged aiming at each frequency, and the size, the weight and the cost of the whole equipment are reduced.
Drawings
Fig. 1 is a schematic diagram of the operation principle of a duplexer in the prior art.
Fig. 2 is a schematic partial cross-sectional structure diagram of the microstrip duplexer of the present invention.
Fig. 3 is a schematic structural diagram of the microstrip duplexer of the present invention.
Detailed Description
Example 1:
as shown in fig. 2 and fig. 3, the improved microstrip duplexer of the present invention includes a dielectric substrate 1 and a metal ground layer 2, wherein the metal ground layer 2 covers one side of the dielectric substrate 1, the other side of the dielectric substrate 1 is provided with a signal transmission coupling channel, the signal transmission coupling channel is formed by a strip-shaped metal layer 3 attached to the dielectric substrate 1, two ends of the strip-shaped metal layer 3 are provided with antenna connection ports 8, the strip-shaped metal layer 3 is connected with a first frequency filter 4 and a second frequency filter 5, a side surface of the strip-shaped metal layer 3 is provided with a third frequency coupling filter 6 and a fourth frequency coupling filter 7, each of the third frequency coupling filter 6 and the fourth frequency coupling filter 7 includes a receiving signal output terminal, the first frequency and the second frequency are two frequencies for transmitting signals, the third frequency and the fourth frequency are two frequencies for receiving signals.
Further, the strip-shaped metal layer 3 appears on the dielectric substrate 1 as a ring with a break gap, and the ring is in a shape of a circle, an ellipse, a rectangle, a rounded rectangle, or a shape similar to a circle, an ellipse, a rectangle, or a rounded rectangle.
Further, each of the first frequency filter 4 and the second frequency filter 5 includes two or more linear conductor patches spaced in parallel with each other, and one end of one conductor patch is connected to the strip metal layer 3.
Further, each of the third frequency coupling filter 6 and the fourth frequency coupling filter 7 includes a first microstrip feeder, a second microstrip feeder, and a third microstrip feeder, the second microstrip feeder is linear, each of the first microstrip feeder and the third microstrip feeder includes a linear portion spaced in parallel with the second microstrip feeder, one end of the linear portion of the first microstrip feeder is further connected with an extension portion, the extension portion is adjacent to the strip-shaped metal layer 3 and spaced in parallel or approximately in parallel, and one end of the third microstrip feeder is provided with a received signal output port.
Further, the dielectric substrate 1 is FR4 or a PTFE dielectric substrate 1.
The working principle of the embodiment is as follows: the strip metal layer 3 is a signal transmission coupling channel, and the impedance of the strip metal layer 3 is effectively matched with the antenna. The impedance of the first frequency filter 4 is matched to the first frequency transmitter and signal transmission coupling path for the first frequency f1And (6) filtering. The impedance of the second frequency filter 5 is matched to the second frequency transmitter and signal transmission coupling path for the second frequency f2And (6) filtering. First frequency f1And a second frequency f2Are two different frequencies. A third frequency coupling filter 6 matched to the third frequency receiver and the signal transmission coupling channel for a third frequency f3And (6) filtering. A fourth frequency coupling filter 7 matched to the fourth frequency receiver and the signal transmission coupling path for a fourth frequency f4And (6) filtering. In an embodiment, the first frequency f1Is 800MHz, the second frequency f2Is 900MHz, a third frequency f3Is 1700MHz, the fourth frequency f4Is 2500 MHz. The transmitter transmits a first frequency f1When the signal passes through the first frequency filter 4, the signal passes through the signal transmission coupling channel without loss basically and enters the antenna for transmission, and the rest of the second frequency filter 5, the third frequency coupling filter 6 and the fourth frequency coupling filter 7 are used for the first frequency f1The signals are not responded, and effective isolation between the signals is realized. The transmitter transmits the second frequency f2When the signal is transmitted, its working principle and first frequency f1The same signal is used. Receiving the third frequency f by the antenna3Is coupled to the third frequency coupling filter 6 via the signal transmission coupling channel, and the third frequency coupling filter 6 transmits the received signal to the receiver. Receiving the fourth frequency f by the antenna4When the signal is received, its operating principle and the third frequency f3The same signal is used.
Claims (2)
1. A microstrip duplexer comprises a dielectric substrate and a metal grounding layer, wherein the metal grounding layer covers one side of the dielectric substrate, and the microstrip duplexer is characterized in that: the other side of the dielectric substrate is provided with a signal transmission coupling channel, the signal transmission coupling channel is formed by a strip-shaped metal layer attached to the dielectric substrate, two ends of the strip-shaped metal layer are provided with antenna connection ports, the strip-shaped metal layer is connected with a first frequency filter and a second frequency filter, the side surface of the strip-shaped metal layer is provided with a third frequency coupling filter and a fourth frequency coupling filter, the third frequency coupling filter and the fourth frequency coupling filter respectively comprise a signal receiving output end, the first frequency and the second frequency are two frequencies for transmitting signals, and the third frequency and the fourth frequency are two frequencies for receiving signals;
the first frequency, the second frequency, the third frequency and the fourth frequency are four different frequencies;
the first frequency filter and the second frequency filter respectively comprise more than two linear conductor patches, the more than two linear conductor patches are parallel and spaced, and one end of one conductor patch is connected with the strip-shaped metal layer;
the third frequency coupling filter and the fourth frequency coupling filter respectively comprise a first microstrip feeder line, a second microstrip feeder line and a third microstrip feeder line, the second microstrip feeder line is linear, the first microstrip feeder line and the third microstrip feeder line respectively comprise a linear part which is parallel to and spaced from the second microstrip feeder line, one end of the linear part of the first microstrip feeder line is also connected with an extension part, the extension part is adjacent to the strip-shaped metal layer and is parallel or approximately parallel to and spaced from the strip-shaped metal layer, and one end of the third microstrip feeder line is provided with a received signal output port.
2. The microstrip duplexer of claim 1, characterized in that: the strip-shaped metal layer is represented on the dielectric substrate as a ring with a break-off notch, and the ring is circular, oval, rectangular or rounded rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810364290.6A CN108390135B (en) | 2018-04-23 | 2018-04-23 | Microstrip duplexer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810364290.6A CN108390135B (en) | 2018-04-23 | 2018-04-23 | Microstrip duplexer |
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| CN108390135A CN108390135A (en) | 2018-08-10 |
| CN108390135B true CN108390135B (en) | 2020-02-18 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100574004C (en) * | 2005-11-11 | 2009-12-23 | 中国科学院上海微系统与信息技术研究所 | The annular coupler of compensation-type spiral micro-band resonance unit and formation thereof |
| CN102195110B (en) * | 2010-03-12 | 2014-07-23 | 财团法人交大思源基金会 | Multifrequency duplexing circulator |
| CN203166051U (en) * | 2012-12-21 | 2013-08-28 | 京信通信系统（中国）有限公司 | Microstrip triplexer |
| CN104577268B (en) * | 2015-01-04 | 2017-06-06 | 华南理工大学 | Plane low pass band logical triplexer |
| CN104681900B (en) * | 2015-03-06 | 2017-08-25 | 西安电子科技大学 | The high-isolation duplexer of electromagnetism branch coupling |
| CN106785299A (en) * | 2016-12-21 | 2017-05-31 | 中国航空工业集团公司雷华电子技术研究所 | A kind of method for designing of multilayer acoustical panel strip line duplexer |
| CN208142317U (en) * | 2018-04-23 | 2018-11-23 | 上海中航欣盛航空技术有限公司 | micro-strip duplexer |
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Address after: 200120 room 2203, 1200 Pudong Avenue, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Applicant after: AVIC SHANGHAI XINSHENG AVIATION TECHNOLOGY Co.,Ltd. Address before: 201617 158 Tang Ming Road, Shek Hu Town, Songjiang District, Shanghai Applicant before: AVIC SHANGHAI XINSHENG AVIATION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20240112 Address after: No. 158 Tangming Road, Shihudang Town, Songjiang District, Shanghai, April 2016 Patentee after: Shanghai Eagle Peak Industrial Co.,Ltd. Address before: Room 2203, No. 1200, Pudong Avenue, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai 200120 Patentee before: AVIC SHANGHAI XINSHENG AVIATION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20240424 Address after: No.398, Xinlu Road, Xinbang Town, Songjiang District, Shanghai, 201600 Patentee after: Tushibao (Shanghai) Digital Technology Co.,Ltd. Country or region after: China Address before: No. 158 Tangming Road, Shihudang Town, Songjiang District, Shanghai, April 2016 Patentee before: Shanghai Eagle Peak Industrial Co.,Ltd. Country or region before: China |