CN109950685A - A kind of high-gain circular polarisation radial line slot antenna of beam tilt - Google Patents
A kind of high-gain circular polarisation radial line slot antenna of beam tilt Download PDFInfo
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- CN109950685A CN109950685A CN201910156196.6A CN201910156196A CN109950685A CN 109950685 A CN109950685 A CN 109950685A CN 201910156196 A CN201910156196 A CN 201910156196A CN 109950685 A CN109950685 A CN 109950685A
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Abstract
The invention discloses a kind of high-gain circular polarisation radial line slot antenna of beam tilt, the antenna include single layer microwave-medium plate, several groups rectangular aperture to and introduce capacitive component coaxial feed probe；Wherein, several groups rectangular aperture to the central point O around single layer microwave-medium substrate, helically arrange by formula, and the coaxial feed probe for introducing capacitive component is located at point O；Every group of gap to by two be mutually perpendicular to and between there are the rectangular apertures in gap to constitute, coupling factor by change rectangle length and width be adjusted；Coaxial feed probe introduces capacitive component by etching annular gap on dielectric-slab.The present invention realizes the circular polarized antenna array of high-gain, and its circular polarity format and Squint angle direction and size can be with flexible modulations, and antenna overall structure is simple, easy to process, low in cost.
Description
Technical field
The invention belongs to antenna technical field, the high-gain circular polarisation radial line slot day of especially a kind of beam tilt
Line.
Background technique
Equipment of the antenna as radiating and receiving electromagnetic wave, is connected to free space and guided wave, in communication, radar, leads
It plays an important role in the wireless devices such as boat and broadcast.The quality of antenna performance directly determines wireless telecom equipment
Signal transmits superiority and inferiority.With the fast development of wireless communication, antenna has obtained more being widely applied in military and civil field,
The performance of required antenna is also increasingly various.Hyundai electronics Information Technology Development is rapid at present, as in radio communication
An important ring, antenna have obtained more and more attention, and theoretical increasingly mature, method is more various, possess it is more extensive before
Scape.
With the development of the technologies such as communication detecting, telemetering remote sensing, face various weather conditions and geographic requirements, antenna for
It is polarized require it is higher and higher.Circular polarized antenna has the advantages that many linear polarized antennas are unexistent.Circular polarisation has rotation direction just
The property handed over；Polarization distortion can be eliminated；It can receive any polarized electromagnetic wave, while can also be received by any poliarizing antenna；
The anti-misty rain interference performance of the Reversibility bring of rotation direction；It is able to suppress multipath reflection.Just because of these advantages of circularly polarised wave, circle
Poliarizing antenna is now widely used under complex environment radiating and requiring high-precision field at a distance, such as electronic reconnaissance and dry
It disturbs, radar detection, satellite communication countermeasure etc..
Radial linear array antenna is a kind of way of realization of common high gain array antenna, is divided into radial line slot array
Antenna and radial line probe feed array antenna two types.After radial wire antenna is suggested to, due to its feed and spoke
The high-efficient characteristic penetrated widely is applied to the fields such as satellite reception, communication broadcast and space exploration at present.Compared to radial direction
Line probe fed antennas, radial line slot antenna possess simple processing, low-cost advantage in high-gain field.But it is existing
The radiation direction of some circular polarisation radial line slot antennas is led usually in the axial direction of antenna in current some applications
Domain, such as detection guidance, electronic reconnaissance often require that the radiation beam of antenna has certain drift angle.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of high-gain of simple, the at low cost beam tilt of structure
Circular polarisation radial line slot antenna.
The technical solution for realizing the aim of the invention is as follows: a kind of high-gain circular polarisation radial line slot day of beam tilt
Line, including single layer microwave-medium substrate, several groups rectangular aperture to and one introducing capacitive component coaxial feed probe；
Wherein, several groups rectangular aperture to the central point O around single layer microwave-medium substrate, helically arrange by formula, introduces capacitive component
Coaxial feed probe is located at the central point O；
Every group of rectangular aperture constitutes rectangular aperture identical, orthogonal by two sizes, two rectangular apertures
Between there are gap, coupling factor is adjusted by changing the length and width of rectangle；The coaxial feed for introducing capacitive component
Probe includes short-circuited coaxial feed probes and the annular gap for introducing capacitive component, and short-circuited coaxial feed probes are located at central point O
Place and run through single layer microwave-medium substrate, annular gap around short-circuited coaxial feed probes and is located at single using central point O as the center of circle
The upper surface of layer microwave-medium substrate.
Since the starting rectangular aperture of the helical alignment up to the size of the rectangular aperture pair of circle second from the bottom to
In incremental Long-term change trend, to obtain uniform Aperture distribution；The size of all rectangular apertures pair of outmost turns is consistent, and each group of square
The normalization radiation energy in shape gap pair is greater than threshold value p, and the value of p is 0 < p < 1.
Further, the circular polarity format of the antenna, Squint angle direction and size are adjustable, specific as follows:
The circular polarity format of the antenna is adjustable, especially by change several groups rectangular aperture to around single layer microwave-medium base
Realize that the circular polarity format of antenna is adjustable in the direction of the central point O helical alignment of plate.
The Squint angle direction of the antenna is adjustable, specifically:
Several groups rectangular aperture to around single layer microwave-medium substrate central point O helical alignment in, depending on each circle square
Shape gap is to for a submatrix；Each submatrix is translated i.e. on a direction perpendicular to antenna prompt radiation direction
The Squint angle direction that antenna can be achieved is adjustable；Wherein, antenna prompt radiation direction is the axial direction of antenna.
The Squint angle of the antenna is adjustable, specifically:
Distance by changing each submatrix translation realizes that the Squint angle of antenna is adjustable, specifically:
It is starting with central point O, the radial direction along helical alignment is 1,2 to submatrix number consecutively ..., and, N, N are son
The number of battle array, according to required Squint angle size θ0Obtain the progressive phase θ (n) of n-th of submatrix are as follows:
θ (n)=nkdsin θ0
In formula, k is wave number, θ0For Squint angle size, d is array element spacing, that is, gap pair radial distance, numerically for
Waveguide wavelength λg；
The distance of each submatrix translation is determined according to progressive phase, then n-th of submatrix translation distance Δ d (n) are as follows:
Compared with prior art, the present invention its remarkable advantage are as follows: 1) present invention is by from the starting rectangle being spirally distributed
Gap is in be incremented by Long-term change trend to the size started up to the rectangular aperture pair of circle second from the bottom, obtains uniform Aperture distribution, into
And it can be realized high-gain；2) present invention realizes that section is low on single-layer medium plate；3) present invention introduces appropriate in feed port
Capacitive component, while offsetting perceptual weight caused by grounding probe, will not main mould TEM mould to radial waveguide field point
Cloth interferes, and realizes the impedance matching of feed port, easy processing；4) present invention is by adjusting each circle gap to the side of translation
To the Squint angle that different directions and size can be realized with size, flexible design；5) present invention etches on single-layer medium plate
The circular polarisation radial line slot antenna array of the high-gain of beam tilt can be realized in rectangular aperture, and structure is simple, easy to process,
It is at low cost.
Present invention is further described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the high-gain circular polarisation radial line slot antenna of beam tilt of the present invention.
Fig. 2 is that the high-gain circular polarisation radial line slot antenna of beam tilt of the present invention realizes the principle signal of beam tilt
Figure.
Fig. 3 is the S of the inclined high-gain circular polarisation radial line slot antenna of wave beam in the embodiment of the present invention11Parameter signal
Figure.
Fig. 4 is the gain side of the inclined high-gain circular polarisation radial line slot antenna 35GHz of wave beam in the embodiment of the present invention
To curve graph.
Fig. 5 is that the axis of the inclined high-gain circular polarisation radial line slot antenna of wave beam in the embodiment of the present invention compares curve graph.
Fig. 6 is that the gain of the inclined high-gain circular polarisation radial line slot antenna of wave beam in the embodiment of the present invention becomes with frequency
Change curve graph.
Specific embodiment
In conjunction with Fig. 1, the high-gain circular polarisation radial line slot antenna of beam tilt of the present invention, including single layer microwave-medium base
Plate 1, several groups rectangular aperture are to 2 and the coaxial feed probe of an introducing capacitive component；Wherein, several groups rectangular aperture
To 2, around the central point O of single layer microwave-medium substrate 1, helically formula is arranged, and the coaxial feed probe for introducing capacitive component is located at
At central point O；
To 2, by two sizes, identical, orthogonal rectangular aperture is constituted every group of rectangular aperture, between two rectangular apertures
There are gap, coupling factor is adjusted by changing the length and width of rectangle；Introduce capacitive component coaxial feed probe include
Short-circuited coaxial feed probes 3 and the annular gap 4 for introducing capacitive component, short-circuited coaxial feed probes 3 are located at central point O and pass through
Single layer microwave-medium substrate 1 is worn, annular gap 4 around short-circuited coaxial feed probes 3 and is located at single layer using central point O as the center of circle
The upper surface of microwave-medium substrate 1.
Further, up to the rectangular aperture of circle second from the bottom is to 2 since the starting rectangular aperture of helical alignment is to 2
Size be in be incremented by Long-term change trend, to obtain uniform Aperture distribution；All rectangular apertures of outmost turns are consistent to 2 size and every
One group of rectangular aperture improves efficiency 2 normalization radiation energy greater than threshold value p to reduce back wave, and wherein the value of p is 0
< p < 1.
It is exemplary preferably, p=0.9.
Further, the circular polarity format of the antenna is adjustable, surrounds single layer to 2 especially by several groups rectangular aperture is changed
Realize that the circular polarity format of antenna is adjustable in the direction of the central point O helical alignment of microwave-medium substrate 1.
Illustratively, several groups rectangular aperture is in clock wise spirals around the central point O of single layer microwave-medium substrate 1 to 2
Formula arrangement, the circular polarity format of the high-gain circular polarisation radial line slot antenna of beam tilt are left-hand circular polarization；
Or illustratively, several groups rectangular aperture is in counterclockwise around the central point O of single layer microwave-medium substrate 1 to 2
Helical alignment, the circular polarity format of the high-gain circular polarisation radial line slot antenna of beam tilt are right-handed circular polarization.
Further, the Squint angle direction of the antenna is adjustable, in conjunction with Fig. 2, specifically:
Several groups rectangular aperture is surrounded to 2 in the central point O helical alignment of single layer microwave-medium substrate 1, depending on each circle
Rectangular aperture is a submatrix to 2；Each submatrix is carried out on a direction perpendicular to antenna prompt radiation direction flat
The Squint angle direction that antenna can be realized in shifting is adjustable；Wherein, antenna prompt radiation direction is the axial direction of antenna.
Further, the Squint angle of the antenna is adjustable, specifically:
Distance by changing each submatrix translation realizes that the Squint angle of antenna is adjustable, specifically:
It is starting with central point O, the radial direction along helical alignment is 1,2 to submatrix number consecutively ..., and, N, N are son
The number of battle array, according to required Squint angle size θ0Obtain the progressive phase θ (n) of n-th of submatrix are as follows:
θ (n)=nkdsin θ0
In formula, k is wave number, θ0For Squint angle size, d is array element spacing, that is, gap pair radial distance, numerically for
Waveguide wavelength λg；
The distance of each submatrix translation is determined according to progressive phase, then n-th of submatrix translation distance Δ d (n) are as follows:
Further, which introduces capacitive component by adjusting the internal diameter and outer diameter size of annular gap 4, realizes feed
The impedance matching of port in the process, will not be to the master of radial waveguide while offsetting perceptual weight caused by grounding probe
The field distribution of mould TEM mould interferes.
Illustratively, single layer microwave-medium substrate 1 is using the commercial plate of Rogers RT 5880.
Below with reference to embodiment, the present invention is described in further detail.
Embodiment
It include 737 groups of rectangular apertures in the present embodiment, in selected aerial array to unit, working frequency 35GHz.
The coupling factor of 737 groups of rectangular apertures pair is controlled by its different length and width, and every group of gap is to by two orthogonal rectangles
Gap is constituted, and is in approximate clock-wise spiral arrangement around single layer microwave-medium substrate center point O, is radiated left-hand circular polarization wave；1
A coaxial feed probe for introducing capacitive component is located at central point O, including a short-circuited coaxial feed probes and one are in
Heart point O is the annular gap in the center of circle.
The size of 737 groups of rectangular apertures pair is not quite similar, since by the gap of near point O, the size in preceding 594 groups of gaps pair
At incremental variations under certain rule, approaches uniformity Aperture distribution is obtained by gap various sizes of on bore face, is obtained with this
Obtain high-gain；The size in 143 groups of gaps pair is consistent afterwards and guarantees that the normalization radiation energy in every group of gap pair is greater than 0.9, reduces
Back wave improves efficiency.
The position of 737 groups of rectangular apertures is arranged on the basis of initial basic helix, respectively radiates phase to different gaps
The influence of position is modified, and the position in each gap is finely adjusted radially；In conjunction with Fig. 2, by every approximate circle
Gap is translated in a direction perpendicular to antenna prompt radiation direction, and acquisition progressive phase is poor, realizes beam tilt.
By the gap of one circle of approximation to regarding a submatrix as, antenna prompt radiation direction is z-axis direction, in order in y in the present embodiment
3 ° of Squint angle is obtained in axis direction, then the translation distance of n-th of submatrix in the y-axis direction is Δ d (n)=n × 0.23mm.
By introducing capacitive component in one annular gap of perimeter etch of short-circuited coaxial feed probes, annulus is adjusted
The internal diameter of gap is 1.2mm, and outer diameter 1.6mm reaches impedance matching.
Antenna aperture is 150mm in the present embodiment, and the width in preceding 594 groups of gaps pair is 0.3mm, length range 2-
2.91mm, the width in rear 143 groups of gaps pair are 0.4mm, length 3.28mm.Antenna medium plate uses dielectric constant for 2.2, damage
Consumption angle is just cut to 0.0009, with a thickness of the commercial plate of Rogers RT 5880 of 1.57mm.
It is the S of the high-gain circular polarisation radial line slot antenna of beam tilt of the embodiment of the present invention in conjunction with Fig. 311Parameter is bent
Line chart, it is known that antenna realizes good impedance matching in the bandwidth of 33-37GHz.
It is the high-gain circular polarisation radial line slot antenna of beam tilt of the embodiment of the present invention 35GHz's in conjunction with Fig. 4
Gain pattern curve graph, it is known that Squint angle of the antenna in y-axis direction is 3 °, and left-hand circular polarization gain is 32.5dBic.
In conjunction with Fig. 5, the axis for the high-gain circular polarisation radial line slot antenna of beam tilt of the embodiment of the present invention compares curve
Figure, it is known that antenna remains good circular polarization characteristics in the bandwidth of 33-37GHz.
It is the gain of the high-gain circular polarisation radial line slot antenna of beam tilt of the embodiment of the present invention with frequency in conjunction with Fig. 6
Rate change curve, it is known that the 3dB gain bandwidth of antenna is 34.2-36.5GHz.
From the foregoing, it will be observed that the high-gain circular polarisation radial line slot antenna of the present embodiment beam tilt is not only in single-layer medium plate
On realize the circular polarization radiation of high-gain, and obtain 3 ° of Squint angle in the y-axis direction.
To sum up, circular polarisation radial line slot antenna of the present invention has high-gain, and its circular polarity format and Squint angle
Direction and size can be with flexible modulations, and antenna overall structure is simple, easy to process, low in cost.
Claims (9)
1. a kind of high-gain circular polarisation radial line slot antenna of beam tilt, which is characterized in that including single layer microwave-medium base
Plate (1), several groups rectangular aperture introduce the coaxial feed probe of capacitive component to (2) and one；Wherein, several groups rectangle
To (2), around the central point O of single layer microwave-medium substrate (1), helically formula is arranged in gap, introduces the coaxial feed of capacitive component
Probe is located at the central point O；
To (2), by two sizes, identical, orthogonal rectangular aperture is constituted every group of rectangular aperture, and two rectangular apertures
Between there are gap, coupling factor is adjusted by changing the length and width of rectangle；The coaxial feed for introducing capacitive component
Probe includes short-circuited coaxial feed probes (3) and the annular gap (4) for introducing capacitive component, short-circuited coaxial feed probes (3) position
At central point O and run through single layer microwave-medium substrate (1), annular gap (4) surround short-circuited coaxial using central point O as the center of circle
Feed probes (3) and the upper surface for being located at single layer microwave-medium substrate (1).
2. the high-gain circular polarisation radial line slot antenna of beam tilt according to claim 1, which is characterized in that from institute
The starting rectangular aperture for stating helical alignment starts (2) until the rectangular aperture of circle second from the bottom is in be incremented by the size of (2)
Long-term change trend, to obtain uniform Aperture distribution；All rectangular apertures of outmost turns are consistent to the size of (2), and each group of rectangle
Gap is greater than threshold value p to the normalization radiation energy of (2), and the value of p is 0 < p < 1.
3. the high-gain circular polarisation radial line slot antenna of beam tilt according to claim 2, which is characterized in that described
P=0.9.
4. the high-gain circular polarisation radial line slot antenna of beam tilt according to claim 2, which is characterized in that the day
The circular polarity format of line is adjustable, surrounds in single layer microwave-medium substrate (1) especially by several groups rectangular aperture is changed to (2)
Realize that the circular polarity format of antenna is adjustable in the direction of heart point O helical alignment.
5. the high-gain circular polarisation radial line slot antenna of beam tilt according to claim 4, which is characterized in that described
Central point O of the several groups rectangular aperture to (2) around single layer microwave-medium substrate (1) arranges in clock wise spirals formula, and wave beam inclines
The circular polarity format of oblique high-gain circular polarisation radial line slot antenna is left-hand circular polarization；
Alternatively, central point O of the several groups rectangular aperture to (2) around single layer microwave-medium substrate (1) is arranged in counter-clockwise helical formula
Cloth, the circular polarity format of the high-gain circular polarisation radial line slot antenna of beam tilt are right-handed circular polarization.
6. the high-gain circular polarisation radial line slot antenna of beam tilt according to claim 1, which is characterized in that the day
The Squint angle direction of line is adjustable, specifically:
Several groups rectangular aperture surrounds (2) in the central point O helical alignment of single layer microwave-medium substrate (1), depending on each circle
Rectangular aperture is a submatrix to (2)；Each submatrix is carried out on a direction perpendicular to antenna prompt radiation direction
The Squint angle direction that antenna can be realized in translation is adjustable；Wherein, antenna prompt radiation direction is the axial direction of antenna.
7. the high-gain circular polarisation radial line slot antenna of beam tilt according to claim 6, which is characterized in that the day
The Squint angle of line is adjustable, specifically:
Distance by changing each submatrix translation realizes that the Squint angle of antenna is adjustable, specifically:
It is starting with central point O, the radial direction along helical alignment is 1,2 to submatrix number consecutively ..., and, N, N are submatrix
Number, according to required Squint angle size θ0Obtain the progressive phase θ (n) of n-th of submatrix are as follows:
θ (n)=nkd sin θ0
In formula, k is wave number, θ0For Squint angle size, it is numerically waveguide wave that d, which is array element spacing, that is, gap pair radial distance,
Long λg；
The distance of each submatrix translation is determined according to progressive phase, then n-th of submatrix translation distance Δ d (n) are as follows:
8. the high-gain circular polarisation radial line slot antenna of beam tilt according to claim 1, which is characterized in that the day
Line introduces capacitive component by adjusting the internal diameter and outer diameter size of annular gap (4), realizes the impedance matching of feed port.
9. the high-gain circular polarisation radial line slot antenna of beam tilt according to claim 1, which is characterized in that described
Single layer microwave-medium substrate (1) is using the commercial plate of Rogers RT 5880.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910156196.6A CN109950685B (en) | 2019-03-01 | 2019-03-01 | High-gain circular polarization radial line slot antenna with inclined wave beams |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910156196.6A CN109950685B (en) | 2019-03-01 | 2019-03-01 | High-gain circular polarization radial line slot antenna with inclined wave beams |
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| CN109950685B CN109950685B (en) | 2020-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115207607A (en) * | 2022-07-11 | 2022-10-18 | 南阳师范学院 | Low-coupling broadband radial line slot antenna |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576942A (en) * | 2009-09-04 | 2012-07-11 | 日本电气东芝太空系统株式会社 | Radial line slot array antenna |
-
2019
- 2019-03-01 CN CN201910156196.6A patent/CN109950685B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576942A (en) * | 2009-09-04 | 2012-07-11 | 日本电气东芝太空系统株式会社 | Radial line slot array antenna |
Non-Patent Citations (2)
| Title |
|---|
| M. TAKAHASHI ET-AL: "《Basic Design of Beam Tilting Radial Line Slot Antennas》", 《IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM. 1995 DIGEST》 * |
| 殷玉凤: "《单层基片圆极化波导缝隙天线的研究》", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115207607A (en) * | 2022-07-11 | 2022-10-18 | 南阳师范学院 | Low-coupling broadband radial line slot antenna |
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