CN105470643B - Difference UWB antennas with high cmrr and high rectangle degree trap - Google Patents
Difference UWB antennas with high cmrr and high rectangle degree trap Download PDFInfo
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- CN105470643B CN105470643B CN201510993409.2A CN201510993409A CN105470643B CN 105470643 B CN105470643 B CN 105470643B CN 201510993409 A CN201510993409 A CN 201510993409A CN 105470643 B CN105470643 B CN 105470643B
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- rectangular aperture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Abstract
The invention discloses a kind of difference UWB antennas with high cmrr and high rectangle degree trap, which uses the microstrip-fed form of dual-port difference, is fed by differential bandpass filter electrode couple on floor, realizes ultra wide band work.The introducing of differential bandpass filter makes the antenna achieve the effect that high cmrr.One group of resonator is introduced on floor and respectively near difference microstrip feed line, the trap characteristic for realizing high rectangle degree in the frequency band of interference may be being generated with other systems, and the length for adjusting resonator can control the frequency and bandwidth of trap.
Description
Technical field
The present invention relates to field of antenna, more particularly to a kind of difference with high cmrr and high rectangle degree trap
UWB antennas.
Background technology
In recent years, due to the fast development of wireless mobile communications, more stringent requirements are proposed to new communication mode by people.
Original communication spectrum is used by many wireless communication systems, and available frequency range is fewer and fewer.And Ultra-wideband Communication Technology
(Ultra-wideband, UWB) since its is low in energy consumption, high bit rate, power density is minimum, while also having propagation distance remote,
The characteristics of strong antijamming capability and good confidentiality, obtains the extensive concern of academia and industrial quarters.Ultra-wideband antenna is as super
Essential emitting and receiving equipment in broadband system, it has simple small size, broadband, design, stable radiation and is easy
The features such as being integrated with external circuit.The bandwidth of UWB be 3.1-10.6GHz, in entire frequency range with the 5.2GHz/ of wlan system
The 5.5GHz of 5.8GHz and WiMAX produces overlapping, will result in Communication Jamming in this way.In order to avoid this interference, it is necessary to
These frequency bands are filtered out in the design process of ultra-wideband antenna.It is a kind of simple and practical solution is set in ultra-wideband antenna
Filter design is added in meter, forms the UWB antennas with trap characteristic.It slots on radiator or loads resonator, on floor
On the trap effect that can reach certain such as crack or load resonator.Using the combination of multiple resonators, trap can be made
With preferable rectangular degree.
The fast development of wireless communication technique also promotes the needs of fully integrated radio frequency front-end product.Integrated RF front end
Generally use differential technique realizes that one of the critical component as radio-frequency front-end, most of Antenna Designs are one port devices, no
It can be directly integrated with difference channel, it usually needs differential signal is converted to using balun by single port signal then feed antenna.
The use of balun can cause to be lost, and system effectiveness is made to reduce, and also increase the quantity of individual devices, and it is integrated to be unfavorable for system altitude
And miniaturization.
Differential antennae changes the design method of traditional antenna, directly differential signal is fed into two ports of antenna,
Radio-frequency front-end to design highly integrated provides new approach.
Invention content
The shortcomings that it is an object of the invention to overcome the prior art and deficiency provide a kind of with high cmrr and height
The difference UWB antennas of rectangular degree trap.
The purpose of the present invention is achieved through the following technical solutions：It is a kind of with high cmrr and high rectangle degree trap
Difference UWB antennas, including be printed on the dual-port difference microstrip feed structures on dielectric-slab upper layer, gradual change shape dipole structure and
Be printed on the differential bandpass filter structure of dielectric-slab lower layer, the dual-port difference microstrip feed structures include first port and
Second port, the first port are directly connected together with second port, inside the dual-port difference microstrip feed structures also
Equipped with resonance minor matters；The gradual change shape dipole structure is with the dual-port difference microstrip feed structures in same layer；The difference
It includes the first rectangular aperture, the second rectangular aperture and third rectangular aperture, first rectangular aperture to divide bandpass filter structures
It is identical with the second rectangular aperture structure, it is connected by third rectangular aperture, the width of the third rectangular aperture is less than described the
Respectively there is an open-circuit resonant gap on the both sides of the width of one rectangular aperture and the second rectangular aperture, the differential bandpass filter；Institute
Dual-port difference microstrip feed structures are stated to be disposed vertically with the third rectangular aperture.
From first port with second port feed-in amplitude identical, the differential signal of opposite in phase.
The length of the resonance minor matters is half wavelength.
The length in the open-circuit resonant gap is quarter-wave.
Compared with prior art, the present invention having the following advantages that and advantageous effect：
1, design structure of the present invention is simple, meets miniature requirement, easy to process.
2, the present invention is compared with traditional UWB antennas, and the design uses differential feed structure, it is easier to difference channel collection
At.
3, the present invention realizes common-mode signal height inhibition using differential feed.
4, compared with existing difference UWB antennas, the design is realized using two groups of resonator combinations with high the present invention
The trap characteristic of rectangular degree eliminates UWB communication systems and WLAN and the mutual interference of WiMAX system.
Description of the drawings
Fig. 1 is the dielectric-slab superstructure of antenna of the present invention；
Fig. 2 is the medium version understructure of the present invention filled in；
Fig. 3 is the Electromagnetic Simulation S parameter curve of antenna in the embodiment of the present invention.
Specific implementation mode
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
A kind of difference UWB antennas with high cmrr and high rectangle degree trap of Patent design of the present invention, the antenna
Using the microstrip-fed form of dual-port difference, is fed, realized by differential bandpass filter electrode couple on floor
Ultra wide band works.The introducing of differential bandpass filter makes the antenna achieve the effect that high cmrr.It is on floor and poor
Divide microstrip feed line nearby to introduce one group of resonator respectively, high rectangle degree is being realized in the frequency band that may generate interference with other systems
Trap characteristic, and the length for adjusting resonator can control the frequency and bandwidth of trap.
Present invention employs the differential bandpass filter structures and gradual change shape on dual-port difference microstrip feed structures, floor
Dipole structure, antenna overall structure are as shown in Figure 1 and Figure 2.Wherein Fig. 1 is dielectric-slab superstructure, and Fig. 2 is understructure.With
Unlike general differential feed, the two-port p1 and p2 of the differential feed of inventive antenna are directly connected together, from port
P1 with P2 feed-in amplitudes are identical, the differential signal of opposite in phase.1 in Fig. 1 is grading structure dipole, and P1 and P2 are feed end
Mouthful, 2 be half wave resonance minor matters；3 in Fig. 2 be floor, and three rectangular apertures 4a, 4b and 4c constitute the filter of difference band logical
Wave device, S1 and S2 are two symmetrical quarter-wave open-circuit resonant gaps on side.Differential signal passes through from P1 and P2 feed-ins
Differential bandpass filter structure on floor is fed by narrow slit 4b electrode couple.Dipole is designed to grading structure, is
For better impedance matching, to realize the ultra wide band work of 3.2-10GHz.When common-mode signal entrance, difference microstrip feed line
Current potential in symmetric position is equal, the gap on floor cannot be encouraged to work, and then dipole cannot generate radiation, so common mode
Signal is inhibited well.Trap is played in the introducing of the resonance minor matters 2 on dielectric-slab upper layer and resonant slot S1, S2 of lower layer
Effect can be used for generating the trap frequency near 5.2 and 5.8GHz.When the length of resonance minor matters 2 is approximately equal to 5.2GHzThe length of resonant slot S1 and S2 are approximately equal to 1/4 λ when 5.8GHzg, two trap frequencies are all
It can be controlled respectively by adjusting the length of resonance minor matters and gap, after adjustment appropriate, two trap frequencies are closed
Together, 5.1-6GHz formed high rectangle degree trap characteristic, so as to avoid UWB systems work when with WLAN, WiMAX
System generates unnecessary mutual interference.
Patent of the present invention is printed on FR4 dielectric-slabs two sides, permittivity εe=4.4, thickness d=0.8mm.It includes mainly
Differential feed part (feed port is P1 and P2), antenna floor 3 and dipole 1.The microstrip-fed printed portions of difference are being situated between
Scutum upper layer, there are two feed ports (P1, P2), and there are one minor matters 2 inside feed section, and feed section top is dipole
1.Antenna floor printing has the bandpass filter that 4a, 4b and 4c are formed thereon in the lower layer of dielectric-slab, and there are two gaps of opening a way
S1, S2.Feed section and gap 4c's is disposed vertically so that common-mode signal cannot encourage gap, common-mode signal to be suppressed.Medium
The minor matters 1 on plate upper layer and the effect of gap S1, S2 are provided to realize that trap function, the length of minor matters 1 are approximately equal to corresponding fall into
The 1/2 of wave frequency rate waveguide wavelength, the length of open circuit gap S1 and S2 are approximately equal to the 1/4 of corresponding trap frequency waveguide wavelength.It sees
The current distribution of Cha Xianbopinshuaichu can see, and electric current is mainly distributed on corresponding minor matters and slot edge.Two groups of resonators
Trap effect, the Electromagnetic Simulation S parameter of different structure can also be well understood by from Fig. 3.
Antenna structure is as shown in Figure 1, differential signal passes through the differential bandpass filter antithesis on floor from P1 and P2 feed-ins
Extremely son is fed, and the grading structure of dipole is to realize ultra wide band work to reach preferable impedance matching.Feed section
Common-mode signal is can inhibit with being disposed vertically for floor joint.The resonance minor matters 2 of 1/2 waveguide wavelength of dielectric-slab upper layer and lower layer 1/4
The combination of open circuit the gap S1, S2 of waveguide wavelength realize the trap characteristic with high rectangle degree, and trap frequency can pass through tune
Whole resonance minor matters or the length in gap control.The Electromagnetic Simulation S parameter of inventive antenna is as shown in Figure 3.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (4)
1. the difference UWB antennas with high cmrr and high rectangle degree trap, it is characterised in that including being printed on dielectric-slab
Dual-port difference microstrip feed structures, gradual change shape dipole structure and the difference band logical filter for being printed on dielectric-slab lower layer on upper layer
Wave device structure, the dual-port difference microstrip feed structures include first port and second port, the first port and second
Port is directly connected together, and resonance minor matters are additionally provided with inside the dual-port difference microstrip feed structures；The gradual change shape dipole
Minor structure is with the dual-port difference microstrip feed structures in same layer；The differential bandpass filter structure includes the first rectangle
Gap, the second rectangular aperture and third rectangular aperture, first rectangular aperture and the second rectangular aperture structure are identical, by third
Rectangular aperture is connected, and the width of the third rectangular aperture is less than the width of first rectangular aperture and the second rectangular aperture
Degree, respectively there is an open-circuit resonant gap on the both sides of the differential bandpass filter；The dual-port difference microstrip feed structures and institute
Third rectangular aperture is stated to be disposed vertically.
2. the difference UWB antennas according to claim 1 with high cmrr and high rectangle degree trap, feature exist
In：From first port with second port feed-in amplitude identical, the differential signal of opposite in phase.
3. the difference UWB antennas according to claim 1 with high cmrr and high rectangle degree trap, feature exist
In：The length of the resonance minor matters is half wavelength.
4. the difference UWB antennas according to claim 1 with high cmrr and high rectangle degree trap, feature exist
In：The length in the open-circuit resonant gap is quarter-wave.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510993409.2A CN105470643B (en) | 2015-12-23 | 2015-12-23 | Difference UWB antennas with high cmrr and high rectangle degree trap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510993409.2A CN105470643B (en) | 2015-12-23 | 2015-12-23 | Difference UWB antennas with high cmrr and high rectangle degree trap |
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| Publication Number | Publication Date |
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| CN105470643A CN105470643A (en) | 2016-04-06 |
| CN105470643B true CN105470643B (en) | 2018-07-20 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232434B (en) * | 2017-12-15 | 2023-11-21 | 华南理工大学 | Low-profile omnidirectional radiation filtering dipole antenna |
| CN109687152B (en) * | 2018-12-11 | 2020-08-11 | 南京邮电大学 | Microwave rectification antenna |
| CN111463562B (en) * | 2020-03-03 | 2022-02-01 | 杭州电子科技大学 | Ultra-wideband differential feed PIFA antenna with filtering effect |
| CN111463563B (en) * | 2020-03-03 | 2022-02-01 | 杭州电子科技大学 | Ultra-wideband differential PIFA antenna suitable for 5G communication |
| CN111653853B (en) * | 2020-06-11 | 2021-08-17 | 浙江大学 | Sawtooth type stripline common mode filter circuit without through holes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993242A (en) * | 2015-06-18 | 2015-10-21 | 华南理工大学 | High-common-mode-rejection high-resistance-band differential ultra-wideband SIR slot antenna |
| CN205452534U (en) * | 2015-12-23 | 2016-08-10 | 华南理工大学 | Difference UWB antenna with high common mode rejection ratio and high rectangle degree trapped wave |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9722315B2 (en) * | 2013-02-11 | 2017-08-01 | Samsung Electronics Co., Ltd. | Ultra-wideband (UWB) dipole antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993242A (en) * | 2015-06-18 | 2015-10-21 | 华南理工大学 | High-common-mode-rejection high-resistance-band differential ultra-wideband SIR slot antenna |
| CN205452534U (en) * | 2015-12-23 | 2016-08-10 | 华南理工大学 | Difference UWB antenna with high common mode rejection ratio and high rectangle degree trapped wave |
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| CN105470643A (en) | 2016-04-06 |
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