CN107221746A - A kind of Broadband circularly polarized antenna based on V-type gap - Google Patents
A kind of Broadband circularly polarized antenna based on V-type gap Download PDFInfo
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- CN107221746A CN107221746A CN201710441206.1A CN201710441206A CN107221746A CN 107221746 A CN107221746 A CN 107221746A CN 201710441206 A CN201710441206 A CN 201710441206A CN 107221746 A CN107221746 A CN 107221746A
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- polarized antenna
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- circularly polarized
- gap
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- 239000000758 substrate Substances 0.000 claims abstract description 22
- 230000005855 radiation Effects 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000010287 polarization Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
Classifications
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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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a kind of Broadband circularly polarized antenna based on V-type gap, including medium substrate, the medium substrate back up Z-type microstrip feed line, the Z-type microstrip feed line connects stub, the medium substrate front sets radiation patch, aperture slots and closure gap are etched in the radiation patch, the aperture slots and closure gap be V-type right angle gap and symmetrical on the vertical center line of radiation patch, the present invention Broadband circularly polarized antenna, with simple in construction, size it is small, it is easy regulation, circular polarisation band is wide the features such as.
Description
Technical field
The present invention relates to a kind of Broadband circularly polarized antenna, and in particular to a kind of Broadband circularly polarized antenna based on V-type gap.
Background technology
Due to circular polarized antenna unique advantage in mobile communications, it is set to receive great attention.Circular polarized antenna
Due to insensitive to rotation direction, the problem of traditional linear polarized antenna produces signal attenuation in polarization mismatch can be avoided.Line pole
Polarization rotation easily occurs in transmission environment and causes decay for change ripple, and circularly polarised wave runs into barrier meeting reversely, because direct projection
Ripple and back wave have polarization isolation, so circularly polarised wave has very strong antijamming capability and anti-misty rain ability, and in the people
It is widely used with military domain.Due to the unique anti-interference and anti-fading characteristic of circular polarized antenna, GPS is widely used in
In the communication system such as (global positioning system), RFID (radio frequency identification), WLAN (wireless MAN).
The difficult point of design Broadband circularly polarized antenna is impedance and axle ratio while reaching broadband character and keeping antenna
Small size performance.Common circular polarisation technology has following several：To radiation patch corner cut, perturbation list is introduced in square gap
Member, cross dipole antenna, using feeding network of 90 ° of phase differences etc..But these methods have size big and narrow bandwidth
Shortcoming.Traditional slot antenna size is often half-wavelength, and aperture slots antenna size is usually quarter-wave.Therefore
Small size can be kept while broadband is reached using aperture slots design circular polarized antenna.
The content of the invention
In order to overcome the shortcoming and deficiency that prior art is present, the present invention provides a kind of broadband entelechy based on V-type gap
Change antenna, the circular polarized antenna have it is simple in construction, make easily, broadband, small size the advantages of.
The present invention is adopted the following technical scheme that：
A kind of Broadband circularly polarized antenna based on V-type gap, including medium substrate, the medium substrate back up Z-type
Microstrip feed line, the Z-type microstrip feed line connects stub, and the medium substrate front sets radiation patch, the radiation patch
Upper etching aperture slots and closure gap, the aperture slots and closure gap are V-type right angle gap and on radiation patch
Vertical center line it is symmetrical.
The Z-type microstrip feed line is made up of three microstrip lines, respectively the first microstrip line, the second microstrip line and the 3rd micro-strip
Line, first microstrip line and the 3rd microstrip line are respectively perpendicular to the two ends of the second microstrip line, the stub and the second micro-strip
Line is vertically connected.
The length of the aperture slots is about 1/2nd wavelength of operating frequency of antenna.
The Z-type microstrip feed line is by the aperture slots close to the summit side correspondence corresponding position in the medium substrate back side
Put, couple feed is carried out to aperture slots.
The width of aperture slots is more than the width in closure gap.
The size of the radiation patch is identical with the size of medium substrate.
Beneficial effects of the present invention：
A kind of Broadband circularly polarized antenna based on V-type gap disclosed by the invention, employs the structure of aperture slots, effectively
The size for reducing antenna；
Cutting back is added on a kind of Broadband circularly polarized antenna based on V-type gap disclosed by the invention, Z-type microstrip feed line
Line, forms multifrequency resonance, is effectively increased the impedance bandwidth of antenna；
A kind of Broadband circularly polarized antenna based on V-type gap disclosed by the invention, introduces V-type closure seam on paster
Gap, so that orthogonal electric field reaches 90 ° of phase differences on broadband, forms the circular polarisation in broadband.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the physical dimension figure of the present invention, and unit is millimeter；
Fig. 3 is the return loss plot of embodiment emulation in Fig. 1；
Fig. 4 is the axle of emulation of the embodiment of the present invention than figure.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As Figure 1-Figure 2, a kind of Broadband circularly polarized antenna based on V-type gap, including medium substrate, the medium base
Back prints Z-type microstrip feed line, and the Z-type microstrip feed line is made up of three microstrip lines, respectively the first microstrip line 1a, second
Microstrip line 1b and the 3rd microstrip line 1c, described first and the 3rd microstrip line it is vertical with the second microstrip line respectively be connected, the cutting back
Line 2 is connected with the second microstrip line, and first microstrip line is connected with medium substrate left hand edge, one side of the 3rd microstrip line and medium
Substrate top edge is connected.
The medium substrate front printing radiation patch 6, the size of the radiation patch is identical with the size of medium substrate,
The radiation patch is etched with aperture slots 4 and closure gap 5, and described two gaps are V-type right angle gap, the present embodiment
In, the length and width of V-type aperture slots are more than length and width that V-type closes gap, aperture slots and closure gap opening
Direction is identical, equal upward opening, and symmetrical on radiation patch vertical center line, V-type aperture slots and V-type the closure gap
Two side is parallel to each other, and the lower section that gap is located at aperture slots is closed in embodiment, its summit is on same straight line, open seam
The length of gap is 1/2nd wavelength of operating frequency of antenna.
Position on the left of the aperture slots summit is the specific feed placement of aperture slots, its corresponding medium substrate back of the body
Z-type microstrip feed line is printed in face position, carries out couple feed to aperture slots, can preliminarily encourage low-frequency resonant and entelechy
Change.
It is to realize low-frequency resonant first, and obtains preliminary circular polarisation.Aperture slots 4 are etched in radiation patch 6,
Ad-hoc location 3 of the back side of medium substrate by Z-type microstrip feed line Jing Guo V-type aperture slots, couple feed is carried out to gap.Can be with
Low-frequency resonant and circular polarisation are preliminarily encouraged.
The Z-type microstrip feed line is made up of three microstrip lines, respectively the first microstrip line, the second microstrip line and the 3rd micro-strip
Line, first microstrip line and the 3rd microstrip line are respectively perpendicular to the two ends of the second microstrip line, the stub and the second micro-strip
Line is vertically connected, as shown in figure 1, the second microstrip line is located at the corresponding medium substrate back position of aperture slots, the stub
Perpendicular to the second microstrip line.
Secondly introduce multifrequency resonance and widen impedance bandwidth, stub 2 is accessed on Z-type microstrip feed line, so as to introduce many
Frequency resonance, is effectively increased impedance bandwidth.
Finally realize the circular polarization characteristics of whole frequency band.V-type closure gap is etched in radiation patch 6, is made on paster mutually
Mutually orthogonal electric field reaches 90 ° of phase differences, so as to be less than 3dB in whole frequency band axle ratio, that is, reaches circular polarisation.
In order to verify the validity of this programme, instantiation is given below and illustrates.
In this example, it is 4.4 from relative dielectric constant, loss angle tangent is 0.02, thickness is situated between for 0.8mm FR4
Matter substrate, the planar dimension of medium substrate is 44 × 42mm.Stub lengths are 5.6mm, the wide 7.2mm of V-type aperture slots, closure
Slit width 3mm, long 16.5mm, remainder size as shown in table 1 are directly presented in actually implementing with 50 ohm of coaxial lines
Electricity, the inner wire of coaxial line is connected with microstrip feed line, and outer conductor is connected with radiation patch, and specific size is as shown in table 1, single
Position mm：
Table 1
| L | W | H | L1 | L2 | L3 | L4 | L5 |
| 42 | 44 | 0.8 | 12.6 | 7.4 | 16.5 | 14 | 5.5 |
| L6 | L7 | L8 | L9 | L10 | W1 | W2 | W3 |
| 23.2 | 6.3 | 5.6 | 11.8 | 19 | 22 | 7.2 | 3 |
| W4 | W5 | W6 | W7 | W8 | |||
| 2.9 | 4.2 | 2.3 | 2 | 3.6 |
The return loss and axle ratio result of the circular polarized antenna emulation made with above-mentioned Fig. 2 illustrated dimensions respectively such as Fig. 3 and
Fig. 4.As seen from the figure, the circular polarized antenna is in 2.19-4.6GHz, and return loss is less than -10dB, and axle ratio is less than 3dB, opposite band
A width of 71%, Broadband circularly polarized antenna of the invention, with spies such as simple in construction, size is small, easy regulation, circular polarisation band are wide
Point, is suitable for the high-speed data communication scene such as RFID, WLAN, WIMAX.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by the embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (6)
1. a kind of Broadband circularly polarized antenna based on V-type gap, it is characterised in that including medium substrate, the medium substrate back of the body
Z-type microstrip feed line is printed in face, and the Z-type microstrip feed line connects stub, and the medium substrate front sets radiation patch, described
In radiation patch etch aperture slots and closure gap, the aperture slots and closure gap be V-type right angle gap and on
The vertical center line of radiation patch is symmetrical.
2. Broadband circularly polarized antenna according to claim 1, it is characterised in that the Z-type microstrip feed line is by three micro-strips
Line is constituted, respectively the first microstrip line, the second microstrip line and the 3rd microstrip line, the first microstrip line and the 3rd the microstrip line difference
Perpendicular to the two ends of the second microstrip line, the stub is vertical with the second microstrip line to be connected.
3. Broadband circularly polarized antenna according to claim 1, it is characterised in that the length of the aperture slots is antenna work
/ 2nd wavelength of working frequency.
4. Broadband circularly polarized antenna according to claim 1, it is characterised in that the Z-type microstrip feed line is opened described in
Mouth gap carries out couple feed close to summit side correspondence medium substrate back side opposite position to aperture slots.
5. Broadband circularly polarized antenna according to claim 1, it is characterised in that the width of aperture slots is more than closure gap
Width.
6. Broadband circularly polarized antenna according to claim 1, it is characterised in that the size of the radiation patch and medium base
The size of plate is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710441206.1A CN107221746A (en) | 2017-06-13 | 2017-06-13 | A kind of Broadband circularly polarized antenna based on V-type gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710441206.1A CN107221746A (en) | 2017-06-13 | 2017-06-13 | A kind of Broadband circularly polarized antenna based on V-type gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107221746A true CN107221746A (en) | 2017-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710441206.1A Pending CN107221746A (en) | 2017-06-13 | 2017-06-13 | A kind of Broadband circularly polarized antenna based on V-type gap |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911832A (en) * | 2019-11-28 | 2020-03-24 | 歌尔股份有限公司 | Microstrip slot antenna and signal transmission equipment |
| CN113156375A (en) * | 2021-03-30 | 2021-07-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Passive phase modulation chip of millimeter wave phased array T/R assembly |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207038706U (en) * | 2017-06-13 | 2018-02-23 | 华南理工大学 | A kind of Broadband circularly polarized antenna based on V-type gap |
-
2017
- 2017-06-13 CN CN201710441206.1A patent/CN107221746A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207038706U (en) * | 2017-06-13 | 2018-02-23 | 华南理工大学 | A kind of Broadband circularly polarized antenna based on V-type gap |
Non-Patent Citations (2)
| Title |
|---|
| HUI-FEN HUANG等: "A Simple V-Shaped Slot Antenna with Broadband Circular Polarization" * |
| 杨超等: "L型槽宽带圆极化天线" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911832A (en) * | 2019-11-28 | 2020-03-24 | 歌尔股份有限公司 | Microstrip slot antenna and signal transmission equipment |
| CN113156375A (en) * | 2021-03-30 | 2021-07-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Passive phase modulation chip of millimeter wave phased array T/R assembly |
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Application publication date: 20170929 |