CN203589215U

CN203589215U - Mobile phone terminal composite antenna

Info

Publication number: CN203589215U
Application number: CN201320737823.3U
Authority: CN
Inventors: 何其娟; 孙劲
Original assignee: Shanghai Amphenol Airwave Communication Electronics Co Ltd
Current assignee: Shanghai Amphenol Airwave Communication Electronics Co Ltd
Priority date: 2013-10-18
Filing date: 2013-11-21
Publication date: 2014-05-07
Anticipated expiration: 2023-11-21
Also published as: CN103606742A; CN103606742B

Abstract

The utility model provides a mobile phone terminal composite antenna, which comprises a shell and an antenna part, wherein the antenna part comprises a radiator, a feeding part, a switch and an inductor, the radiator is in the shape of a cover with one end being open, the shell is in the shape of a hollow polygonal body with both ends being open, the opening end of the radiator is connected with one opening end of the shell through an insulating medium; the feeding part is connected to a feed source, and the feeding part and the switch part are located at the upper end of a connecting part of the radiator and the shell; the inductor is located at the lower end of the connecting part of the radiator and the shell; and the feeding part, the switch and the inductor are all connected with the radiator and the shell. When the switch is opened, the mobile phone terminal composite antenna realizes composition of a diversity antenna and a WIFI antenna; and when the switch is closed, the mobile phone terminal composite antenna realizes composition of the diversity antenna, a GPS antenna and the WIFI antenna. The mobile phone terminal composite antenna can operates in such three operating frequency bands as diversity reception, GPS communication and WIFI communication, thereby simplifying the antenna design, reducing the use space, and being adapt to the tendency that the space size of antennas is reduced.

Description

Composite antenna of mobile phone terminal

Technical Field

The utility model relates to an antenna design technical field especially relates to a cell-phone terminal composite antenna.

Background

With the rapid development of mobile communication, the functions of mobile terminals are becoming more and more abundant, applications such as GPS, BT/WIFI (2.4 GHz), WIFI (5 GHz) and the like are gradually popularized, more antennas are required to cover a new frequency range, and more mobile terminals not only have one main antenna, but also combine a plurality of auxiliary antennas, such as a GPS antenna, a BT antenna and a WIFI antenna. However, the space left for the antennas inside the mobile terminal is very limited, and the antennas occupy a certain space inside the mobile terminal, so the space factor of the antennas becomes a restriction for the miniaturization of the mobile terminal. Therefore, under the condition that the external size and the internal space of the current mobile terminal are both very limited, how to pursue a strong function and enable the volume of the mobile terminal to be light, thin and convenient is a technical problem which needs to be solved urgently.

In addition, in order to improve the wireless performance of communication, a diversity receiving circuit is often added to the product design to reduce the influence of multipath and the like. Currently, more and more wireless terminals can support diversity reception and WIFI functions. The diversity unit and the WIFI unit both use independent antennas, or the diversity unit and the GPS unit use one antenna, and the WIFI unit independently uses the other antenna. But has the following disadvantages: the diversity unit and the WIFI unit both use independent antennas, so that the problem of interference coexistence due to excessive antennas of the same product can be caused; the diversity unit and the GPS unit use one antenna and need to be switched by a radio frequency switch, and the diversity unit and the GPS unit cannot be used simultaneously.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model relates to a mobile phone terminal composite antenna, which is arranged in a mobile terminal and comprises a shell with conductive performance and an antenna part; wherein,

the antenna part comprises a radiation body, a feed part, a switch and an inductor, wherein the feed part receives a feed source signal, the radiation body is in a cover shape with one open end, and the open end of the radiation body is connected with the shell through an insulating medium; the feed part and the switch are positioned on the upper end face of the joint of the radiator and the shell, the inductor is positioned on the lower end face of the joint of the radiator and the shell, the inductor is positioned between the feed part and the switch, and the feed part, the switch and the inductor are all connected with the shell and the radiator.

In some embodiments, the housing is a hollow polygon open at both ends.

In some embodiments, the distance between the antenna portion and the housing is 0.5mm-2 mm.

In some embodiments, the insulating medium is in the shape of a closed loop.

In some embodiments, the switch is a radio frequency switch or a diode with an on-off function.

In some embodiments, the inductance value of the inductor ranges from 1.5nH to 6.8 nH.

The utility model discloses owing to adopt above technical scheme, make it compare with prior art, have following advantage and positive effect:

the utility model provides a pair of cell-phone terminal composite antenna can regard as the auxiliary antenna in the antenna to use, can work simultaneously and receive at the diversity, GPS communication and the three work frequency channel of WIFI communication to simplify the antenna design, reduced the usage space, adapt to the trend that antenna space size reduces.

Drawings

The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic reverse side view of the present invention;

fig. 2 is a schematic front view of the present invention;

fig. 3 is a schematic side view of the present invention;

fig. 4 is a three-dimensional schematic view of the present invention;

FIG. 5 is a first schematic diagram of the present invention;

fig. 6 is a second schematic diagram of the present invention.

Description of the symbols:

11-shell

12-insulating medium

101-feeding part

102-radiator

103-switch

104-inductor

Detailed Description

The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.

Referring to fig. 1-6, the utility model provides a pair of mobile phone terminal composite antenna sets up on a mobile terminal, collects diversity reception, GPS, three kinds of different functions of WIFI communication as an organic whole. The mobile phone terminal diversity, GPS and WIFI composite antenna comprises a shell 11 with conductive performance and an antenna part, wherein the antenna part is connected with the shell through an insulating medium. Wherein the antenna part comprises a feeding part 101, a radiator 102, a switch 103 and an inductance 104.

Specifically, the case 11 is made of a metal having an electrically conductive property, but it is needless to say that an alloy, such as stainless steel or a magnesium-aluminum alloy, may be used as a material for making the case, and the case may be made by a process such as milling or forging. The housing 11 has a polyhedron shape, and is a hollow polygonal body with two open ends, including left and right side surfaces, a bottom surface, and a front surface, although the length and shape thereof may be set according to specific situations, and is not limited herein. The radiator 102 is in a cover-shaped structure with one open end, and the open end of the radiator 102 is connected with one open end of the shell 11 through the insulating medium 12; the insulating medium 12 may be in the form of a closed ring, a sheet, a rectangular parallelepiped, or the like; the insulating medium 12 may be a polymer or the like, and is coupled to the antenna portion by injection molding or the like. The insulating medium 12 is used to divide the housing 11 and the antenna portion by a distance of about 0.5mm to 2mm, and preferably by 1.5 mm. When the utility model discloses when the application is on the mobile terminal, casing 11 and irradiator 102 link to each other, use as a part of mobile terminal shell, can place like parts such as speaker, earphone in the irradiator 102.

In the present embodiment, referring to fig. 3, the power feeding portion 101 is located on the upper end surface where the radiator 102 is connected to the case 11, and the power feeding portion 101 is connected to both the case 11 and the radiator 102; the feed section 101 is connected to a feed and receives a feed signal. The switch 103 is also located on the upper end surface of the connection between the radiator 102 and the housing 11, and connects the housing 11 and the radiator 102; the switch 103 is connected with a mobile terminal signal, and the mobile terminal signal controls the on-off of the switch 103; in the specific implementation process, the switch 103 is a radio frequency single-pole single-throw switch of GaAs gallium arsenide process, and may also be replaced by a diode having on/off function or a radio frequency switch of other processes, which is not limited herein. The inductor 104 is arranged on the lower end face of the joint of the radiator 102 and the shell 11, the shell 11 and the radiator 102 are both connected, and the inductor 104 is positioned between the feed part and the switch; the inductance of inductor 104 ranged from 1.5nH to 6.8nH, and the optimum inductance L1 was 2.7 nH.

The utility model provides a pair of cell-phone terminal composite antenna can regard as the auxiliary antenna in the antenna to use, can work simultaneously and receive at the diversity, GPS communication and the three work frequency channel of WIFI communication to simplify the antenna design, reduced the usage space, adapt to the trend that antenna space size reduces. The radiation principle of the utility model is as follows:

when the switch 103 is opened, since the radiator 102 has the radiation resistance R1 and the equivalent capacitance C1, a resonant circuit is formed between the radiator 102 and the inductor 104 as shown in fig. 5, wherein the value of the inductor 104 is L1. When the resonant circuit works, the first working frequency f1 ranges from 698MHz to 960MHz, and the working frequency requirement of diversity reception is met; the second working frequency f2 is the triple frequency of f1, the frequency range is 2.4 GHz-2.5 GHz, and the working frequency requirement of WIFI communication is met; the third working frequency f3 is six times of the frequency f1, the frequency range is 5.15 GHz-5.85 GHz, and the working frequency requirement of WIFI communication is met. It is thus clear that when switch 103 breaks off, the utility model discloses satisfy the operating frequency requirement of diversity reception and WIFI communication simultaneously.

When the switch 103 is turned on, a signal is connected to the housing 11 through the feeding portion 101 and then through the switch 103 to form an LC circuit having an equivalent inductance L2 and an equivalent capacitance C2. L2 and C2 together with L1 and C1 form a double resonant circuit as shown in FIG. 6, the two resonant frequencies of which are between 1.575GHz and 1.71 GHz-2.17 GHz, respectively. L2 and C2 mainly generate resonant frequency of 1.575GHz, which meets the working frequency of GPS; c1 is connected with C2 in parallel, and L1 is connected with L2 in parallel, so that resonance with wider bandwidth is generated to cover 1.71 GHz-2.17 GHz, and the diversity reception frequency band is met. In addition, a resonant circuit is still formed between the radiator 102 and the inductor 104 to generate a frequency band, the frequency band is described with reference to the switch 103 being turned off, and the resonant circuit covers diversity reception and a WIFI communication frequency band; consequently, when switch 103 switches on the utility model discloses satisfy the working frequency channel requirement of diversity reception, GPS communication and WIFI communication simultaneously.

To sum up, the utility model provides a mobile phone terminal composite antenna, including casing and antenna part. The antenna part comprises a radiator, a feed part, a switch and an inductor, wherein the radiator is in a cover shape with one open end, the shell is in a hollow polygonal body with two open ends, and the open end of the radiator is connected with one open end of the shell through an insulating medium. The feed part is connected with the feed source, the feed part and the switch part are positioned at the upper end of the joint of the radiator and the shell, the inductor is positioned at the lower end of the joint of the radiator and the shell, and the feed part, the switch and the inductor are connected with the radiator and the shell. When the switch disconnection, the utility model discloses realize the compound of diversity antenna and WIFI antenna, realize the compound between diversity antenna, GPS antenna and the WIFI antenna three when the switch is closed. The utility model discloses can simultaneous working receive, GPS communication and the three work frequency channel of WIFI communication in the diversity to simplify the antenna design, reduced the usage space, the trend that adaptation antenna space size reduces.

It will be appreciated by those skilled in the art that the invention can be embodied in many other specific forms without departing from the spirit or scope of the invention. Although embodiments of the present invention have been described, it is to be understood that the invention is not limited to those embodiments, and that changes and modifications may be made by one skilled in the art within the spirit and scope of the invention as defined in the appended claims.

Claims

1. A mobile phone terminal composite antenna is arranged in a mobile terminal and is characterized by comprising a shell with conductive performance and an antenna part; wherein,

2. The composite antenna of mobile phone terminal as claimed in claim 1, wherein the housing is a hollow polygon with two open ends.

3. The composite antenna of mobile phone terminal as claimed in claim 1, wherein the distance between the antenna portion and the housing is 0.5mm-2 mm.

4. The composite antenna of claim 1, wherein the dielectric medium is in a closed loop shape.

5. The composite antenna of the mobile phone terminal as claimed in claim 1, wherein the switch is a radio frequency switch or a diode with on/off function.

6. The composite antenna of mobile phone terminal as claimed in claim 1, wherein the inductance value of the inductor is in the range of 1.5nH-6.8 nH.