CN202759016U - Tunable coupling feed antenna system - Google Patents
Tunable coupling feed antenna system Download PDFInfo
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- CN202759016U CN202759016U CN 201220348269 CN201220348269U CN202759016U CN 202759016 U CN202759016 U CN 202759016U CN 201220348269 CN201220348269 CN 201220348269 CN 201220348269 U CN201220348269 U CN 201220348269U CN 202759016 U CN202759016 U CN 202759016U
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Abstract
The utility model discloses a tunable coupling feed antenna system. The tunable coupling feed antenna system includes a PCB substrate, a radiation unit and a coupling unit, wherein the PCB substrate is provided with a radio frequency grounding point and a radio frequency exciting port; the radiation unit is connected with the PCB substrate through the radio frequency exciting port; and the coupling unit is connected with the PCB substrate through the radio frequency grounding point. A tuning control unit is arranged between the radio frequency grounding point and the coupling unit, wherein the tuning control unit is used for control high-frequency and low-frequency characteristics of the coupling unit, thereby generating different input impedance. The tunable coupling feed antenna system provided by the utility model solves a technical problem that a small and medium-sized and ultrathin antenna cannot meet requirement of covering terminals in different frequency ranges in the prior art and realizes a technical effect of increasing the covering range of antenna frequency on terminals.
Description
Technical field
The utility model relates to the communications field, in particular to a kind of tunable coupling feed antennas system.
Background technology
Long Term Evolution (Long Term Evolution is referred to as LTE) has launched commercialization in the world rapidly as the leading technology of mobile broadband technology of new generation, and at present, the whole world has 38 countries and disposed 64 LTE networks.The planning of current LTE and commercial frequency range mainly comprise: 2600,2100,1900,1800,1700,1500,900,850 and 700 (MHz), its frequency ratio disperse and also the voice scheme of each operator not identical yet, therefore, for after the compatible 2G/3G frequency range of LTE terminal antenna being had higher requirement.At present how to design a kind of ultra-wideband omni-directional antenna that can cover flexibly 0.7GHz-2.7GHz and become problem demanding prompt solution.In the method for designing of the existing expansion beamwidth of antenna, a kind of is to PFIA, the antenna forms such as IFA are improved, for example, increase short dot at the maximum current point place of paster, thereby realize the dual frequency characteristics of antenna and reduce the size of antenna, or additional parasitic structure, to increase notching construction, extension current path etc.For the characteristics of low frequency bandwidth deficiency, low frequency and high frequency antenna separately can also be designed and then close the road becomes antenna system.Above-mentioned improved procedure all needs to have preferably, and antenna environment is difficult to realize in the terminal of miniaturization, ultrathin as support.
For above-mentioned problem, effective solution is proposed not yet at present.
The utility model content
The utility model provides a kind of tunable coupling feed antennas system, is difficult to cover the technical problem of demand of the terminal of different frequency ranges with the antenna that solves at least prior art miniaturization and ultrathin.
According to an aspect of the present utility model, a kind of tunable coupling feed antennas system is provided, comprising: the printing board PCB substrate, radiating element, coupling unit wherein, is provided with radio frequency earth point and RF excited port on the above-mentioned PCB substrate; Above-mentioned radiating element links to each other with above-mentioned PCB substrate by above-mentioned RF excited port; Above-mentioned coupling unit links to each other with above-mentioned PCB substrate by above-mentioned radio frequency earth point, between above-mentioned radio frequency earth point and above-mentioned coupling unit, be provided with tuning controling unit, wherein, above-mentioned tuning controling unit is used for the high and low frequency characteristic of above-mentioned coupling unit is controlled to produce different input impedance.
Preferably, above-mentioned tuning controling unit is comprised of switch control unit and load circuit, perhaps is comprised of adjustable condenser and variable inductor.
Preferably, above-mentioned switch control unit is single pole multiple throw.
Preferably, be provided with a conducting control unit and one or more electrical level control unit on the above-mentioned switch control unit, wherein, above-mentioned conducting control unit is used for the break-make of above-mentioned switch control unit is controlled; Above-mentioned electrical level control unit is used for according to the size of the level of inputting the above-mentioned load circuit that links to each other with above-mentioned switch control unit being controlled, to produce different input impedance when above-mentioned switch control unit is in conducting state.
Preferably, above-mentioned switch control unit is cmos switch or mems switch.
Preferably, above-mentioned coupling unit comprises low frequency branch road and high frequency branch road.
Preferably, above-mentioned low frequency branch road length is 70mm, and above-mentioned high frequency branch road length is 45mm.
Preferably, there is the gap between above-mentioned coupling unit and the above-mentioned radiating element.
Preferably, above-mentioned gap is 0.7mm.
Preferably, the gap between above-mentioned radiating element and the above-mentioned PCB substrate is more than or equal to 3mm, and the gap between above-mentioned coupling unit and the above-mentioned PCB substrate is more than or equal to 3mm.
In the utility model, between coupling unit and radio frequency earth point, be provided with the module of carrying out tuning control, this tuning controling unit can be realized covering to different frequency to coupling unit adjustment, thereby so that antenna system can satisfy the demand of LTE terminal multiband, and the volume that can effectively dwindle antenna relatively simple for structure of coupling unit and radiating element.The antenna that has solved by the way prior art miniaturization and ultrathin is difficult to cover the technical problem of demand of the terminal of different frequency ranges, has reached the technique effect that increases the coverage of antenna frequencies on the terminal.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is a kind of preferred schematic diagram according to the tunable coupling feed antennas system of the utility model embodiment;
Fig. 2 is a kind of preferred schematic diagram of the antenna structure of the utility model embodiment;
Fig. 3 is the radiating element of the utility model embodiment, the planar structure schematic diagram of coupling unit and tuning controling unit;
Fig. 4 is the switch chip of the utility model embodiment and the structured flowchart of additional circuits thereof;
Fig. 5 is 0.6GHz-3GHz antenna reflection coefficient-frequency curve schematic diagram under the normal temperature and pressure of the utility model embodiment.
Embodiment
Hereinafter also describe in conjunction with the embodiments the utility model in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.
The utility model embodiment provides a kind of tunable coupling feed antennas system, as shown in Figure 1, comprising: printed circuit board (Printed Circuit Board, referred to as PCB) substrate 102, radiating element 104, and coupling unit 106, the below carries out concrete description to these several unit.
Be provided with radio frequency earth point 1022 and RF excited port one 024 at PCB substrate 102;
Radiating element links to each other with PCB substrate 102 by RF excited port one 024;
Coupling unit, link to each other with PCB substrate 102 by radio frequency earth point 1022, between radio frequency earth point 1022 and coupling unit 106, be provided with tuning controling unit 108, wherein, tuning controling unit 108 is used for the high and low frequency characteristic of coupling unit 106 is controlled to produce different input impedance.
In above-mentioned preferred implementation, between coupling unit 106 and radio frequency earth point 1022, be provided with the module of carrying out tuning control, this tuning controling unit 108 can adjust to realize covering to different frequency to coupling unit 106, thereby so that antenna system can satisfy the demand of LTE terminal multiband, and the volume that can effectively dwindle antenna relatively simple for structure of coupling unit 106 and radiating element 104.The antenna that has solved by the way prior art miniaturization and ultrathin is difficult to cover the technical problem of demand of the terminal of different frequency ranges, has reached the technique effect that increases the coverage of antenna frequencies on the terminal.
Because above-mentioned tuning controling unit 108 mainly is in order to realize the demand of multiband, therefore, this tuning controling unit 108 can be comprised of switch control unit and load circuit, perhaps is comprised of adjustable condenser and variable inductor.Can be the switch chip with switching function for above-mentioned switch control unit.
Preferably, above-mentioned switch control unit can be selected single pole multiple throw.
When selecting switch control unit and load circuit as the switched tuning unit, can a conducting control unit and one or more electrical level control unit be set at switch control unit, wherein, the conducting control unit is used for the break-make of switch control unit is controlled; Electrical level control unit is used for according to the size of the level of inputting the load circuit that links to each other with switch control unit being controlled, to produce different input impedance when switch control unit is in conducting state.
Switchtype for above-mentioned switch, can select cmos switch (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductors (CMOS), voltage-controlled a kind of amplifying device switch) or MEMS (micro electro mechanical system) (Micro-Electro-Mechanical Systems, referred to as MEMS) switch, the utility model is not done restriction to this.
In order to improve the coupling performance of antenna, the coupling unit 106 of antenna can be divided into two parts of low frequency branch road and high frequency branch road, can be set to 70mm for the length of low frequency branch road, can be set to 45mm for the length of high frequency branch road.
In order to realize preferably coupling effect, between coupling unit 106 and radiating element 104, should leave certain gap, in a preferred implementation, this gap can be 0.7mm.
Consider the environmental requirement of Antenna Design, radiating element 104 and coupling unit 106 need to exceed more than the floor 3mm of PCB substrate 102, that is, the gap between radiating element 104 and the PCB substrate 102 is more than or equal to 3mm, and the gap between coupling unit 106 and the PCB substrate 102 is more than or equal to 3mm.
For the miniaturization of end product size, ultrathin and LTE development are to the requirement of antenna technology, and the utility model embodiment has proposed a kind of tunable coupling feed antennas system configuration, to satisfy the demand of current and potential LTE network.
In the scheme that this preferred embodiment provides, tunable coupling feed antennas system comprises: radiating element, coupling unit, RF excited port and radio frequency earth point, tunable circuit and floor.Wherein, above-mentioned RF excited port, radio frequency earth point and floor all are positioned on the pcb board.
Above-mentioned radiating element and coupling unit can be by FPC, LDS or other Design Processing on the terminal back covers or be arranged on independently on the support.Radiating element is connected with RF excited port on the floor, and coupling unit is connected with radio frequency earth point on the floor, thereby consists of coupling feed antennas structure.
Preferably, can add tunable circuit between coupling unit and radio frequency earth point, the way of realization of this tunable circuit can be switch chip and additional circuits thereof, also can be the network that adjustable condenser and variable inductor form.When using switching circuit tuning, the variation of control signal can make connection of antenna enter different load circuits on the switch chip, and when the input impedance of antenna changed, resonance point will be offset, thereby antenna system can realize the covering of multiband.
Reduced the designing requirement of antenna itself by above-mentioned antenna system, under the comparatively complicated even abominable situation of antenna space, although the beamwidth of antenna is not enough, but switch different operating states by switching circuit, antenna system still can satisfy the demand of LTE terminal wide-band and multiband, especially is adapted to the end product of miniaturization, ultrathin.
It should be noted that the above-mentioned mentioned tunable antenna technology of the utility model embodiment also is applicable to multiple coupling feed antennas structure, for example, with PIFA antenna, IFA antenna and loop aerial of coupling unit etc.According to the difference of frequency range demand, switch chip can be selected single-pole double-throw switch (SPDT), or single pole multiple throw, can select CMOS or mems switch for the type of switch.Above-mentioned tunable antenna technology is not only applicable to single antenna, also is applicable to a plurality of antennas of multiple-input and multiple-output (Multiple-Input Multiple-Out-put is referred to as MIMO) system.Consider the environmental requirement of Antenna Design, radiating element and coupling unit need to exceed more than the floor 3mm of PCB substrate.The tunable circuit design is on the floor of the PCB substrate below the coupling unit.Preferably, the floor on the PCB substrate needs certain empty regions under antenna, and the width of its empty regions can be arranged on about 6mm.
Below in conjunction with a specific embodiment above-mentioned tunable coupling feed antennas is described.
As shown in Figure 2, radiating element 104 and coupling unit 106 can pass through FPC, and LDS or other technique are attached on terminal back cover or the support.Radiating element 104 is connected with RF excited port one 024 on the floor, and coupling unit 106 is connected with radio frequency earth point 1022 on the floor, has consisted of coupling feed antennas structure.
Because radiating element has been realized a part of high frequency mode, coupling unit 106 can be realized the high frequency mode of low frequency mode and another part.The electric size of radiating element 104 can roughly be followed 1/4th requirement of high frequency wavelength, and preferably, the length of radiating element 104 can be set to 25mm, and width is set to 9mm.The electric size of coupling unit 106 comprises respectively: low frequency branch road and high frequency branch road, equally also all follow 1/4th requirement of low frequency and high frequency wavelength, preferably, the low frequency branch road of coupling unit 106 can be set to 70mm, the high frequency branch road is set to long 45mm, and width all is set to 1mm.
The spacing that needs to keep certain between coupling unit 106 and radiating element 104 is to realize preferably coupling effect, and preferably, spacing can be set to 0.7mm.
As shown in Figure 3, increased switching circuit between coupling unit 106 and radio frequency earth point 1022, wherein, the input 1081 of switch connects load circuit and is connected with the radio frequency earth point, and the output 1082 of switch is connected with the antenna-coupled unit.
Describe as an example of the SP3T switch example in the present embodiment, its structured flowchart as shown in Figure 4, wherein, VDD is the conduction level of switch, when switch, this conduction level is in high level state; V1 and V2 belong to control level, and when the size of control level changed, switch will be selected different load circuits.
The logic state table of switch can be as shown in table 1:
Table 1
| State | V1 | V2 | VDD |
| Antenna-load circuit 1 | High | Low | High |
| Antenna-load circuit 2 | Low | High | High |
| Antenna-load circuit 3 | Low | Low | High |
By the design three load circuits, antenna shows three kinds of different input impedance, thereby so that resonance be offset.Under these three kinds of states, the frequency response curve of the reflection coefficient of antenna system as shown in Figure 5.By three kinds of operating states as shown in the figure, this antenna system has covered LTE2600 substantially, 2100,1900,1800,1700,900,850 and 700(MHz) band limits, as shown in Figure 5, the reflection coefficient of the antenna in these frequency ranges all-below the 5dB, substantially satisfied the demand of the multiband of current terminal.
Preferably, in the process of terminal real work, the control signal wire of switch can link to each other with GPIO or the spi bus with Frequency Band Selection information.The height of radiating element and coupling unit is set to 3mm, and the full empty regions of PCB substrate is 6mm simultaneously, and the width of the width fundamental sum PCB substrate of antenna is suitable, thereby can effectively reduce the volume of antenna.
By the antenna system that the utility model embodiment introduces, radiating element and coupling unit simple in structure greatly dwindled antenna volume, and antenna height is lower, more is conducive to the designing requirement of terminal ultrathin design; Effective design by tunable circuit makes antenna system can satisfy the demand of LTE terminal multiband.This antenna structure is simple, debugging is flexible, can satisfy well current LTE communication network to the requirement on electric performance of antenna.
From above description, can find out, the utility model has been realized following technique effect: be provided with the module of carrying out tuning control between coupling unit and radio frequency earth point, this tuning controling unit can be realized covering to different frequency to coupling unit adjustment, thereby so that antenna system can satisfy the demand of LTE terminal multiband, and the volume that can effectively dwindle antenna relatively simple for structure of coupling unit and radiating element.The antenna that has solved by the way prior art miniaturization and ultrathin is difficult to cover the technical problem of demand of the terminal of different frequency ranges, reached the technique effect that increases the coverage of antenna frequencies on the terminal, this antenna form is lower to environmental requirement, and easily the terminal at small ultra-thin realizes.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present utility model or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the utility model is not restricted to any specific hardware and software combination.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. a tunable coupling feed antennas system is characterized in that, comprising: the printing board PCB substrate, and radiating element, coupling unit, wherein,
Be provided with radio frequency earth point and RF excited port on the described PCB substrate;
Described radiating element links to each other with described PCB substrate by described RF excited port;
Described coupling unit links to each other with described PCB substrate by described radio frequency earth point, between described radio frequency earth point and described coupling unit, be provided with tuning controling unit, wherein, described tuning controling unit is used for the high and low frequency characteristic of described coupling unit is controlled to produce different input impedance.
2. antenna system according to claim 1 is characterized in that, described tuning controling unit is comprised of switch control unit and load circuit, perhaps is comprised of adjustable condenser and variable inductor.
3. antenna system according to claim 2 is characterized in that, described switch control unit is single pole multiple throw.
4. according to claim 2 or 3 described antenna systems, it is characterized in that, be provided with a conducting control unit and one or more electrical level control unit on the described switch control unit, wherein,
Described conducting control unit is used for the break-make of described switch control unit is controlled;
Described electrical level control unit is used for according to the size of the level of inputting the described load circuit that links to each other with described switch control unit being controlled, to produce different input impedance when described switch control unit is in conducting state.
5. each described antenna system in 4 according to claim 1 is characterized in that, described switch control unit is cmos switch or mems switch.
6. antenna system according to claim 1 is characterized in that, described coupling unit comprises low frequency branch road and high frequency branch road.
7. antenna system according to claim 6 is characterized in that, described low frequency branch road length is 70mm, and described high frequency branch road length is 45mm.
8. antenna system according to claim 1 is characterized in that, has the gap between described coupling unit and the described radiating element.
9. antenna system according to claim 8 is characterized in that, described gap is 0.7mm.
10. antenna system according to claim 1 is characterized in that, the gap between described radiating element and the described PCB substrate is more than or equal to 3mm, and the gap between described coupling unit and the described PCB substrate is more than or equal to 3mm.
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| CN 201220348269 CN202759016U (en) | 2012-07-18 | 2012-07-18 | Tunable coupling feed antenna system |
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| CN 201220348269 CN202759016U (en) | 2012-07-18 | 2012-07-18 | Tunable coupling feed antenna system |
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| CN103367874A (en) * | 2012-04-06 | 2013-10-23 | 宏碁股份有限公司 | Communicator |
| CN103715504A (en) * | 2012-10-09 | 2014-04-09 | 黑莓有限公司 | Method and apparatus for tunable antenna and ground plane for handset applications |
| CN103904433A (en) * | 2014-04-12 | 2014-07-02 | 深圳市中兴移动通信有限公司 | Tunable multi-band antenna and wireless communication device |
| CN105049012A (en) * | 2014-04-29 | 2015-11-11 | 英飞凌科技股份有限公司 | System and Method for a Radio Frequency Integrated Circuit |
| CN106463835A (en) * | 2014-06-26 | 2017-02-22 | Nec平台株式会社 | Antenna device, wireless communication device, and band adjustment method |
| CN106505293A (en) * | 2015-09-08 | 2017-03-15 | 上海莫仕连接器有限公司 | A kind of mobile device and the coupled antenna for the mobile device |
| CN106887724A (en) * | 2017-03-16 | 2017-06-23 | 宇龙计算机通信科技(深圳)有限公司 | Antenna system and the communication terminal with the antenna system |
| CN107078387A (en) * | 2015-04-10 | 2017-08-18 | 华为技术有限公司 | A kind of multifrequency antenna and terminal device |
| CN107293838A (en) * | 2016-03-31 | 2017-10-24 | 宏碁股份有限公司 | The communicator of antenna element with narrow ground plane clearance zone |
| CN108110437A (en) * | 2017-12-18 | 2018-06-01 | 东莞市合康电子有限公司 | Minimize tunable GPS antenna device and its production technology |
| CN108565544A (en) * | 2018-04-20 | 2018-09-21 | 深圳市信维通信股份有限公司 | A kind of ultra wide band 5G mimo antenna structures |
| CN110299618A (en) * | 2014-01-23 | 2019-10-01 | 华为终端有限公司 | A kind of antenna system and terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103367874A (en) * | 2012-04-06 | 2013-10-23 | 宏碁股份有限公司 | Communicator |
| CN103715504A (en) * | 2012-10-09 | 2014-04-09 | 黑莓有限公司 | Method and apparatus for tunable antenna and ground plane for handset applications |
| US11949172B2 (en) | 2014-01-23 | 2024-04-02 | Honor Device Co., Ltd. | Antenna system and terminal |
| CN110299618B (en) * | 2014-01-23 | 2022-09-30 | 荣耀终端有限公司 | Antenna system and terminal |
| CN110299618A (en) * | 2014-01-23 | 2019-10-01 | 华为终端有限公司 | A kind of antenna system and terminal |
| CN103904433A (en) * | 2014-04-12 | 2014-07-02 | 深圳市中兴移动通信有限公司 | Tunable multi-band antenna and wireless communication device |
| CN105049012B (en) * | 2014-04-29 | 2018-06-12 | 英飞凌科技股份有限公司 | For the system and method for RF IC |
| CN105049012A (en) * | 2014-04-29 | 2015-11-11 | 英飞凌科技股份有限公司 | System and Method for a Radio Frequency Integrated Circuit |
| US10320057B2 (en) | 2014-06-26 | 2019-06-11 | Nec Platforms, Ltd. | Antenna device, wireless communication device, and band adjustment method |
| CN106463835A (en) * | 2014-06-26 | 2017-02-22 | Nec平台株式会社 | Antenna device, wireless communication device, and band adjustment method |
| CN107078387A (en) * | 2015-04-10 | 2017-08-18 | 华为技术有限公司 | A kind of multifrequency antenna and terminal device |
| CN107078387B (en) * | 2015-04-10 | 2020-04-14 | 华为技术有限公司 | Multi-frequency antenna and terminal equipment |
| CN106505293A (en) * | 2015-09-08 | 2017-03-15 | 上海莫仕连接器有限公司 | A kind of mobile device and the coupled antenna for the mobile device |
| CN107293838A (en) * | 2016-03-31 | 2017-10-24 | 宏碁股份有限公司 | The communicator of antenna element with narrow ground plane clearance zone |
| CN106887724A (en) * | 2017-03-16 | 2017-06-23 | 宇龙计算机通信科技(深圳)有限公司 | Antenna system and the communication terminal with the antenna system |
| CN108110437A (en) * | 2017-12-18 | 2018-06-01 | 东莞市合康电子有限公司 | Minimize tunable GPS antenna device and its production technology |
| CN108565544A (en) * | 2018-04-20 | 2018-09-21 | 深圳市信维通信股份有限公司 | A kind of ultra wide band 5G mimo antenna structures |
| CN108565544B (en) * | 2018-04-20 | 2023-10-17 | 深圳市信维通信股份有限公司 | Ultra-wideband 5G MIMO antenna structure |
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