CN205452534U - Difference UWB antenna with high common mode rejection ratio and high rectangle degree trapped wave - Google Patents
Difference UWB antenna with high common mode rejection ratio and high rectangle degree trapped wave Download PDFInfo
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- CN205452534U CN205452534U CN201521095688.2U CN201521095688U CN205452534U CN 205452534 U CN205452534 U CN 205452534U CN 201521095688 U CN201521095688 U CN 201521095688U CN 205452534 U CN205452534 U CN 205452534U
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Abstract
The utility model discloses a difference UWB antenna with high common mode rejection ratio and high rectangle degree trapped wave, this antenna adopt dual -port difference microstrip feed form, carry out the feed through difference band pass filter electrode couple on the floor, have realized ultra wide band work. Difference band pass filter's introduction makes this antenna reach high common mode rejection ratio's effect. Introduce a set of syntonizer respectively on the floor with near the difference microstrip feeder, realize the trap characteristic of high rectangle degree in probably producing the frequency band that disturbs with the other system to the length of adjustment syntonizer can be controlled and fall into wave frequency and bandwidth.
Description
Technical field
This utility model relates to field of antenna, particularly to a kind of difference UWB antenna with high cmrr and high rectangle degree trap.
Background technology
In recent years, due to the fast development of wireless mobile communications, new communication mode is had higher requirement by people.Original communication spectrum is used by many wireless communication systems, and available frequency range is fewer and feweri.And Ultra-wideband Communication Technology (Ultra-wideband, UWB) owing to it is low in energy consumption, high bit rate, power density is minimum, the most also has propagation distance remote, capacity of resisting disturbance is strong and the feature of good confidentiality, it is thus achieved that academia and the extensive concern of industrial quarters.Ultra-wideband antenna is as emitting and receiving equipment requisite in radio ultra wide band system, and it has, and size is little, broadband, design are simple, stable radiation and easily and the feature such as external circuit is integrated.The a width of 3.1-10.6GHz of band of UWB, creates overlapping with the 5.5GHz of 5.2GHz/5.8GHz and WiMAX of wlan system in whole frequency range, so will result in Communication Jamming.In order to avoid this interference, it is necessary to filter these frequency bands in the design process of ultra-wideband antenna.A kind of simple and the solution of practicality is to add filter design in ultra-wideband antenna designs, form the UWB antenna with trap characteristic.Radiant body slotted or loads resonator, crack in floor or load the trap effect that resonator etc. can reach certain.Use the combination of multiple resonator, trap can be made to have preferable rectangular degree.
The fast development of wireless communication technology, also promotes the needs of fully integrated radio frequency front-end product.Integrated RF front end generally uses differential technique to realize, one of critical component as radio-frequency front-end, most of Antenna Design are one port devices, it is impossible to the most integrated with difference channel, it usually needs use balun that differential signal is converted to single port signal then feed antenna.The use of balun can cause loss, makes system effectiveness reduce, and too increases the quantity of individual devices, is unfavorable for that system is highly integrated and miniaturization.
Differential antennae changes the method for designing of traditional antenna, directly differential signal is fed into two ports of antenna, provides new approach for designing highly integrated radio-frequency front-end.
Utility model content
The purpose of this utility model is that the shortcoming overcoming prior art is with not enough, it is provided that a kind of difference UWB antenna with high cmrr and high rectangle degree trap.
The purpose of this utility model is achieved through the following technical solutions: a kind of difference UWB antenna with high cmrr and high rectangle degree trap, including being printed on the dual-port difference microstrip feed structures on dielectric-slab upper strata, gradual change shape dipole structure and being printed on the differential bandpass filter structure of dielectric-slab lower floor, described dual-port difference microstrip feed structures includes the first port and the second port, described first port and the second port are directly connected together, and are additionally provided with resonance minor matters inside described dual-port difference microstrip feed structures；Described gradual change shape dipole structure and described dual-port difference microstrip feed structures are at same layer；Described differential bandpass filter structure includes the first rectangular aperture, the second rectangular aperture and the 3rd rectangular aperture, described first rectangular aperture and the second rectangular aperture structure are identical, it is connected by the 3rd rectangular aperture, the width of described 3rd rectangular aperture is less than described first rectangular aperture and the width of the second rectangular aperture, and the both sides of described differential bandpass filter are respectively arranged with an open-circuit resonant gap；Described dual-port difference microstrip feed structures is disposed vertically with described 3rd rectangular aperture.
Identical from the first port and the second port feed-in amplitude, the differential signal of opposite in phase.
A length of 1/2nd wavelength of described resonance minor matters.
The a length of quarter-wave in described open-circuit resonant gap.
This utility model compared with prior art, has the advantage that and beneficial effect:
1, this utility model design simple in construction, meets miniature requirement, it is easy to processing.
2, this utility model is compared with traditional UWB antenna, and the design uses differential feed structure, it is easier to integrated with difference channel.
3, this utility model uses differential feed to achieve common-mode signal height inhibition.
4, this utility model is compared with existing difference UWB antenna, and the design uses two groups of resonator combinations to achieve the trap characteristic with high rectangle degree, eliminates UWB communication system and WLAN and the mutual interference of WiMAX system.
Accompanying drawing explanation
Fig. 1 is the dielectric-slab superstructure of antenna described in the utility model；
Fig. 2 is the medium version understructure filled in described in the utility model；
Fig. 3 is the Electromagnetic Simulation S parameter curve of antenna in this utility model embodiment.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but embodiment of the present utility model is not limited to this.
A kind of difference UWB antenna with high cmrr and high rectangle degree trap of this utility model Patent design, this antenna is used the microstrip-fed form of dual-port difference, is fed by differential bandpass filter electrode couple on floor, it is achieved that ultra broadband works.The introducing of differential bandpass filter, makes this antenna reach the effect of high cmrr.Introduce one group of resonator on floor and near difference microstrip feed line respectively, in the frequency band that may produce interference with other system, realize the trap characteristic of high rectangle degree, and the length adjusting resonator can control frequency and the bandwidth of trap.
This utility model have employed the differential bandpass filter structure on dual-port difference microstrip feed structures, floor and gradual change shape dipole structure, and antenna overall structure is as shown in Figure 1 and Figure 2.Wherein Fig. 1 is dielectric-slab superstructure, and Fig. 2 is understructure.Unlike general differential feed, two-port p1 and the p2 of the differential feed of this utility model antenna are directly connected together, identical from port P1 and P2 feed-in amplitude, the differential signal of opposite in phase.In Fig. 11 is grading structure dipole, P1 and P2 is feed port, and 2 is 1/2nd wave resonance minor matters；In Fig. 23 are floor, and three rectangular apertures 4a, 4b and 4c constitute differential bandpass filter, S1 and S2 is two symmetrical quarter-wave open-circuit resonant gaps on limit.Differential signal, from P1 and P2 feed-in, the differential bandpass filter structure on floor, is fed by narrow slit 4b electrode couple.Dipole, is designed to grading structure, is for more preferable impedance matching, thus realizes the ultra broadband work of 3.2-10GHz.When common-mode signal enters, and the current potential in difference microstrip feed line symmetric position is equal, it is impossible to the gap work on excitation floor, and then dipole, can not produce radiation, so common-mode signal is well suppressed.The effect of trap is played in the introducing of the resonance minor matters 2 on dielectric-slab upper strata and resonant slot S1, S2 of lower floor, can be used for producing the trap frequency near 5.2 and 5.8GHz.The length of resonance minor matters 2 is approximately equal to 1/2 λ during 5.2GHzg The length of resonant slot S1 and S2 is approximately equal to 1/4 λ during 5.8GHzgTwo trap frequencies can be controlled by by the length of regulation resonance minor matters and gap respectively, after suitable adjustment, two trap frequencies are combined, the trap characteristic of high rectangle degree is formed, such that it is able to produce unnecessary mutual interference with WLAN, WiMAX system when avoiding UWB system to work at 5.1-6GHz.
This utility model patent is printed on FR4 dielectric-slab two sides, DIELECTRIC CONSTANT εe=4.4, thickness d=0.8mm.It mainly contains differential feed part (feed port is P1 and P2), antenna floor 3 and dipole 1.The microstrip-fed printed portions of difference, on dielectric-slab upper strata, has two feed port (P1, P2), has minor matters 2 inside feed section, and feed section top is dipole 1.Antenna floor printing, in the lower floor of dielectric-slab, it has the band filter that 4a, 4b and 4c form, also two open circuits gap S1, S2.Feed section and gap 4c are disposed vertically so that common-mode signal can not encourage gap, and common-mode signal is suppressed.The minor matters 1 on dielectric-slab upper strata and the effect of gap S1, S2 are provided to realize trap function, and the length of minor matters 1 is approximately equal to the 1/2 of corresponding trap frequency waveguide wavelength, and the length of open circuit gap S1 and S2 is approximately equal to the 1/4 of corresponding trap frequency waveguide wavelength.Observe the CURRENT DISTRIBUTION at trap frequency it will be seen that electric current is mainly distributed on corresponding minor matters and slot edge.The trap effect of two groups of resonators, from comparison diagram 3, the Electromagnetic Simulation S parameter of different structure can also be well understood by.
Antenna structure, as it is shown in figure 1, differential signal is from P1 and P2 feed-in, is fed by differential bandpass filter electrode couple on floor, and the grading structure of dipole is to reach preferable impedance matching, it is achieved ultra broadband works.Feed section and being disposed vertically of floor joint can suppress common-mode signal.The combination of the resonance minor matters 2 of dielectric-slab upper strata 1/2 waveguide wavelength and open circuit the gap S1, S2 of lower floor 1/4 waveguide wavelength achieves the trap characteristic with high rectangle degree, and trap frequency can be controlled by the length adjusting resonance minor matters or gap.The Electromagnetic Simulation S parameter of this utility model antenna is as shown in Figure 3.
Above-described embodiment is this utility model preferably embodiment; but embodiment of the present utility model is also not restricted to the described embodiments; other any without departing from the change made under spirit of the present utility model and principle, modify, substitute, combine, simplify; all should be the substitute mode of equivalence, within being included in protection domain of the present utility model.
Claims (4)
1. there is the difference UWB antenna of high cmrr and high rectangle degree trap, it is characterized in that including being printed on the dual-port difference microstrip feed structures on dielectric-slab upper strata, gradual change shape dipole structure and being printed on the differential bandpass filter structure of dielectric-slab lower floor, described dual-port difference microstrip feed structures includes the first port and the second port, described first port and the second port are directly connected together, and are additionally provided with resonance minor matters inside described dual-port difference microstrip feed structures；Described gradual change shape dipole structure and described dual-port difference microstrip feed structures are at same layer；Described differential bandpass filter structure includes the first rectangular aperture, the second rectangular aperture and the 3rd rectangular aperture, described first rectangular aperture and the second rectangular aperture structure are identical, it is connected by the 3rd rectangular aperture, the width of described 3rd rectangular aperture is less than described first rectangular aperture and the width of the second rectangular aperture, and the both sides of described differential bandpass filter are respectively arranged with an open-circuit resonant gap；Described dual-port difference microstrip feed structures is disposed vertically with described 3rd rectangular aperture.
The difference UWB antenna with high cmrr and high rectangle degree trap the most according to claim 1, it is characterised in that: identical from the first port and the second port feed-in amplitude, the differential signal of opposite in phase.
The difference UWB antenna with high cmrr and high rectangle degree trap the most according to claim 1, it is characterised in that: a length of 1/2nd wavelength of described resonance minor matters.
The difference UWB antenna with high cmrr and high rectangle degree trap the most according to claim 1, it is characterised in that: a length of quarter-wave in described open-circuit resonant gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521095688.2U CN205452534U (en) | 2015-12-23 | 2015-12-23 | Difference UWB antenna with high common mode rejection ratio and high rectangle degree trapped wave |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521095688.2U CN205452534U (en) | 2015-12-23 | 2015-12-23 | Difference UWB antenna with high common mode rejection ratio and high rectangle degree trapped wave |
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| CN205452534U true CN205452534U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521095688.2U Withdrawn - After Issue CN205452534U (en) | 2015-12-23 | 2015-12-23 | Difference UWB antenna with high common mode rejection ratio and high rectangle degree trapped wave |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470643A (en) * | 2015-12-23 | 2016-04-06 | 华南理工大学 | Differential UWB antenna with high common-mode rejection ratio and high rectangularity trapped wave |
| CN109687152A (en) * | 2018-12-11 | 2019-04-26 | 南京邮电大学 | A kind of microwave rectification antenna |
| CN112736423A (en) * | 2020-12-10 | 2021-04-30 | 重庆大学 | Compact low-profile differential filtering microstrip patch antenna |
-
2015
- 2015-12-23 CN CN201521095688.2U patent/CN205452534U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470643A (en) * | 2015-12-23 | 2016-04-06 | 华南理工大学 | Differential UWB antenna with high common-mode rejection ratio and high rectangularity trapped wave |
| CN105470643B (en) * | 2015-12-23 | 2018-07-20 | 华南理工大学 | Difference UWB antennas with high cmrr and high rectangle degree trap |
| CN109687152A (en) * | 2018-12-11 | 2019-04-26 | 南京邮电大学 | A kind of microwave rectification antenna |
| CN109687152B (en) * | 2018-12-11 | 2020-08-11 | 南京邮电大学 | Microwave rectification antenna |
| CN112736423A (en) * | 2020-12-10 | 2021-04-30 | 重庆大学 | Compact low-profile differential filtering microstrip patch antenna |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160810 Effective date of abandoning: 20180720 |
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| AV01 | Patent right actively abandoned |