CN102136632A - Circularly-polarized highly-directive periodic groove plate antenna - Google Patents
Circularly-polarized highly-directive periodic groove plate antenna Download PDFInfo
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- CN102136632A CN102136632A CN2011100281976A CN201110028197A CN102136632A CN 102136632 A CN102136632 A CN 102136632A CN 2011100281976 A CN2011100281976 A CN 2011100281976A CN 201110028197 A CN201110028197 A CN 201110028197A CN 102136632 A CN102136632 A CN 102136632A
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Abstract
The invention discloses a circularly-polarized highly-directive periodic groove plate antenna. Linearly polarized probe feed sources which are vertical to each other are respectively inserted into the same cross-section side wall of a cylindrical metal waveguide so as to form a TE11 mode of two cylindrical waveguides between which the phase difference is 90 degrees; one end of the waveguide is closed and serves as a reflecting surface; the other end serves as an emergence port; a circular two-dimensional periodic groove metal plate with the radius which is several times the wavelength is connected with the outer cylindrical surface of the emergence port of the cylindrical metal waveguide; coaxially-distributed and equally-spaced annular metal grooves are reserved on the outward side surface of the two-dimensional periodic groove metal plate; and circularly-polarized electromagnetic waves at the emergence end of the cylindrical metal waveguide is guided to the overall two-dimensional periodic groove metal plate to form in-phase resonance and finish the impedance matching from the cylindrical metal waveguide to free space; therefore, highly-directive circularly-polarized radiation is realized. The circularly-polarized highly-directive periodic groove plate antenna has high wave beam directive property, high radiation efficiency, high circular polarization characteristics and low cross section, and does not influence a fluid design thereof when cured on the surface of a carrying object.
Description
Technical field
The present invention relates to high sensing cycle cutting plate aerial, especially relate to a kind of high sensing cycle cutting of circular polarization plate aerial that utilizes the cylindrical metal waveguide feed.
Background technology
The irradiation structure of cycle cutting plate aerial is formed by the circular metal that is carved with the cycle annular recess is dull and stereotyped.Cycle cutting plate aerial has good beam directional, and has extremely low section, thereby has obtained extensive studies and application in the high directional antenna field.
The design of the irradiation structure of cycle cutting plate aerial derives from and is carved with cycle annular recess, center based on surface plasma principle two-sided is that the metal plate of sub-wavelength aperture sees through enhancement effect research to spatial beams.Discover that this structure not only can produce transmission and strengthen to the incident wave of characteristic frequency, can also produce good beam collimation effect and form the high outgoing of pointing to.The former is that mainly the cycle ring-type groove structure of the plane of incidence is coupled to generation transmission enhancement effect in the aperture with energy, make the theoretical diffraction energy of outgoing energy much larger than single small structure, the latter then is because the surface wave of the cycle ring-type groove structure scattering of exit facet is interfered long mutually with the ripple same-phase in the aperture.
By further research, utilize rectangular waveguide to replace the space wave source, and utilize single face to be carved with cycle annular recess, center to be the metal plate in sub-wavelength slit exit end as waveguide as feed, the height of having designed linear polarization points to cycle cutting plate aerial.
Owing to especially often need use the high directional antenna of circular polarization in the communication field in the practical application, thereby be necessary to change and utilized the mode of rectangular waveguide in the past, proposes the high directional antenna of new Gong circular polarization application as cycle cutting plate aerial feed.
Summary of the invention
The object of the present invention is to provide the high sensing cycle cutting of a kind of circular polarization plate aerial.By cylindrical metal waveguide excitation circularly polarised wave, employing is at the cycle cutting metal plate irradiation structure that links to each other with the waveguide exit ports, the circular polarization electromagnetic wave of waveguide exit end is derived on the whole cutting metal covering, form same phase resonance, finish the impedance matching of waveguide, realize the high circular polarization radiation that points to free space.
The technical solution adopted for the present invention to solve the technical problems is:
Insert an orthogonal linear polarization probe feed respectively at the same cross section of cylindrical metal waveguide sidewall, constitute two the cylindrical waveguide TE11 patterns vertical mutually and phase phasic difference 90 degree that motivate; The one end sealing of cylindrical metal waveguide, as reflecting surface, the other end is as exit ports; With the exit ports external cylindrical surface of cylindrical metal waveguide on the radius that links to each other be several times as much as the wavelength size, circular two-dimension periodic cutting metal plate, two-dimension periodic cutting metal plate is carved with coaxial distribution, equally spaced annular metal groove on the outside side, the circular polarization electromagnetic wave of cylindrical metal waveguide exit end is derived on the whole two-dimension periodic cutting metal plate, form same phase resonance, finish the impedance matching of cylindrical metal waveguide, realize the high circular polarization radiation that points to free space; Constitute the high sensing cycle cutting of circular polarization plate aerial.
Described radius is several times as much as the two-dimension periodic cutting metal plate wavelength size, circular, and its multiple is (51o ~ 66o)/required antenna half-power beamwidth.
Described annular metal groove, its recess width are 2/3 wavelength, and depth of groove is 1/5 wavelength, adjacent grooves be spaced apart 1/4 wavelength.
The useful effect that the present invention has is:
This controlling antenna wave beam to point is good, adopts all-metal construction, no dielectric loss, and overall loss is little, and the radiation efficiency height can be applicable to 1GHz to 100GHz wave band.Have good circular polarization characteristics, and can adjust probe feed phase difference as required and realize polarization output arbitrarily.Spoke side is a two-dimension periodic cutting slab construction, and section is low, can not influence its fluid design when being solidificated in the carrying object surface, and simple in structure, firm, is convenient to processing, not fragile.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is that the B of Fig. 1 is to view.
Fig. 4 is the TE11 pattern of x to the excitation of probe feed.
Fig. 5 is the TE11 pattern of y to the excitation of probe feed.
Fig. 6 is the surface plasma fundamental diagram of cycle cutting metal plate structure.
Among the figure: 1, cylindrical metal waveguide, 2, linear polarization probe feed, 3, two-dimension periodic cutting metal plate, 4, cylindrical metal waveguide reflecting surface, 5, coaxial distribution, equally spaced annular metal groove.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As Fig. 1, Fig. 2, shown in Figure 3, the present invention inserts an orthogonal linear polarization probe feed 2 respectively at cylindrical metal waveguide 1 same cross section sidewall, constitutes two the cylindrical waveguide TE11 patterns vertical mutually and phase phasic difference 90 degree that motivate; The one end sealing of cylindrical metal waveguide 1, as reflecting surface, the other end is as exit ports; With the exit ports external cylindrical surface of cylindrical metal waveguide 1 on the radius that links to each other be several times as much as the wavelength size, circular two-dimension periodic cutting metal plate 3, two-dimension periodic cutting metal plate 3 is carved with coaxial distribution, equally spaced annular metal groove 5 on the outside side, the circular polarization electromagnetic wave of cylindrical metal waveguide 1 exit end is derived on the whole two-dimension periodic cutting metal plate 3, form same phase resonance, finish the impedance matching of cylindrical metal waveguide 1, realize the high circular polarization radiation that points to free space; Constitute the high sensing cycle cutting of circular polarization plate aerial.
Described radius is several times as much as the two-dimension periodic cutting metal plate 3 wavelength size, circular, and its multiple is (51o ~ 66o)/required antenna half-power beamwidth.
Described annular metal groove 5, its recess width are 2/3 wavelength, and depth of groove is 1/5 wavelength, adjacent grooves be spaced apart 1/4 wavelength.
For the height of making this circular polarization points to cycle cutting plate aerial, adopt the cylindrical metal waveguide as aerial radiation structure feed, the waveguide internal diameter is 2/3 wavelength.By orthogonal two the linear polarization probe feeds that insert at the same cross section of cylindrical metal waveguide sidewall, motivate two cylindrical waveguide TE11 patterns vertical mutually and phase phasic difference 90 degree, realize that electromagnetic wave becomes circular polarization to propagate in waveguide; The sealing of waveguide one end, as reflecting surface, the other end is as exit ports.
The electromagnetic field of two cylindrical waveguide TE11 patterns of this cylindrical metal waveguide excitation in cross section distributes as Fig. 4, shown in Figure 5.The main polarised direction of electric field is identical with the direction of probe.By on two probe feeds, adding the pumping signal that applying aspect differs 90 degree, can in the cylindrical metal waveguide, motivate circularly polarised wave.
By add the coupling port at cylindrical metal waveguide exit end, optimize the feed probe length and with the distance of cylindrical metal waveguide reflecting surface and exit ports, obtain best S parameter.Optimizing the back each several part is of a size of: long 1/5 wavelength of waveguide probe, the probe inserting surface is apart from waveguide reflecting surface 1/3 wavelength, apart from waveguide exit ports 1 wavelength.
Be several times as much as at the radius that links to each other with the waveguide exit ports and carve coaxial distribution, equally spaced annular metal groove on the circular metal flat board of wavelength size, the circular polarization electromagnetic wave of waveguide exit end is derived on the whole cutting metal plate, form same phase resonance, finish the impedance matching of waveguide, realize the high circular polarization radiation that points to free space.
The surface plasma operation principle of cycle cutting metal plate structure as shown in Figure 6.Electromagnetic wave is by the cylindrical metal waveguide exit ports feed-in of cycle cutting metal plate structure centre, and concurrent gaining interest penetrated, and portion of energy scatters to free space, and portion of energy is converted into surface wave and propagates at cycle cutting metal plate body structure surface.Surface wave partial reflection when the metal surface is transmitted to metal groove, part transmission, remainder scatters to free space.By the size of control cycle cutting metal plate structure, make each groove realize the homophase scattering, can realize the high sensing of wave beam radiation after the stack.
The cylindrical metal waveguiding structure that fixing above-mentioned optimization is finished, the recess width in the optimization cycle cutting metal plate structure, the degree of depth and groove obtain best S parameter at interval.Optimizing the back each several part is of a size of: recess width is 2/3 wavelength, and depth of groove is 1/5 wavelength, and groove is spaced apart 1/4 wavelength.
The diameter of circular cycle cutting metal plate is several times as much as wavelength, diameter can be adjusted according to the needs of the high directional property of antenna, the main lobe width of the high sensing cycle cutting of this circular polarization plate aerial is inversely proportional to the diameter of circular cycle cutting metal plate, diameter is big more, and the directive property of antenna is good more.
The high sensing cycle cutting of this circular polarization plate aerial can be applicable to 1GHz to 100GHz wave band, and the each several part size is according to the operation wavelength difference and the equal proportion convergent-divergent, and can finish design by trickle adjustment.When being operated in 5GHz, the each several part physical dimension after this antenna optimization is: waveguide internal diameter 40mm, the long 12mm of waveguide probe, probe inserting surface be apart from waveguide reflecting surface 22mm, apart from waveguide exit ports 60mm, and recess width 38mm, depth of groove 12mm, groove is 15mm at interval.
When having 4 concentric annular metal grooves on the circular cycle cutting metal plate of the high sensing of the circular polarization cycle cutting plate aerial that is operated in 5GHz, the diameter of circular cycle cutting metal plate is 494mm.This moment, the radiation efficiency of antenna was 0.9127, gross efficiency is 0.8257, directivity is 17.74dBi, phase center is (0.1732mm, 0.1466mm) overlap substantially with the center of circular cycle cutting metal plate, x-z collimated beam of sound width 9.4 degree, y-z collimated beam of sound width 7.9 degree are 2.45dB perpendicular to the axial ratio of the main exit direction of circular cycle cutting metal plate.
Claims (3)
1. the high sensing cycle cutting of circular polarization plate aerial, it is characterized in that: sidewall inserts an orthogonal linear polarization probe feed (2) respectively in the same cross section of cylindrical metal waveguide (1), constitutes two the cylindrical waveguide TE11 patterns vertical mutually and phase phasic difference 90 degree that motivate; The one end sealing of cylindrical metal waveguide (1), as reflecting surface, the other end is as exit ports; With the exit ports external cylindrical surface of cylindrical metal waveguide (1) on the radius that links to each other be several times as much as the wavelength size, circular two-dimension periodic cutting metal plate (3), two-dimension periodic cutting metal plate (3) is carved with coaxial distribution, equally spaced annular metal groove (5) on the outside side, the circular polarization electromagnetic wave of cylindrical metal waveguide (1) exit end is derived on the whole two-dimension periodic cutting metal plate (3), form same phase resonance, finish the impedance matching of cylindrical metal waveguide (1), realize the high circular polarization radiation that points to free space; Constitute the high sensing cycle cutting of circular polarization plate aerial.
2. the high sensing cycle cutting of a kind of circular polarization according to claim 1 plate aerial, it is characterized in that: described radius is several times as much as two-dimension periodic cutting metal plate (3) the wavelength size, circular, and its multiple is (51o ~ 66o)/required antenna half-power beamwidth.
3. the high sensing cycle cutting of a kind of circular polarization according to claim 1 plate aerial, it is characterized in that: described annular metal groove (5), its recess width are 2/3 wavelength, depth of groove is 1/5 wavelength, adjacent grooves be spaced apart 1/4 wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100281976A CN102136632A (en) | 2011-01-26 | 2011-01-26 | Circularly-polarized highly-directive periodic groove plate antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100281976A CN102136632A (en) | 2011-01-26 | 2011-01-26 | Circularly-polarized highly-directive periodic groove plate antenna |
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| CN102136632A true CN102136632A (en) | 2011-07-27 |
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| CN2011100281976A Pending CN102136632A (en) | 2011-01-26 | 2011-01-26 | Circularly-polarized highly-directive periodic groove plate antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414028A (en) * | 2013-08-09 | 2013-11-27 | 电子科技大学 | High-power microwave resonant cavity antenna |
| CN108832308A (en) * | 2018-06-27 | 2018-11-16 | 安徽农业大学 | A kind of wide angle circular polarized antenna of omnidirectional wide band |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504836A (en) * | 1982-06-01 | 1985-03-12 | Seavey Engineering Associates, Inc. | Antenna feeding with selectively controlled polarization |
| US5043683A (en) * | 1988-07-08 | 1991-08-27 | Gec-Marconi Limited | Waveguide to microstripline polarization converter having a coupling patch |
-
2011
- 2011-01-26 CN CN2011100281976A patent/CN102136632A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504836A (en) * | 1982-06-01 | 1985-03-12 | Seavey Engineering Associates, Inc. | Antenna feeding with selectively controlled polarization |
| US5043683A (en) * | 1988-07-08 | 1991-08-27 | Gec-Marconi Limited | Waveguide to microstripline polarization converter having a coupling patch |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414028A (en) * | 2013-08-09 | 2013-11-27 | 电子科技大学 | High-power microwave resonant cavity antenna |
| CN103414028B (en) * | 2013-08-09 | 2016-05-04 | 电子科技大学 | A kind of High-Power Microwave cavity antenna |
| CN108832308A (en) * | 2018-06-27 | 2018-11-16 | 安徽农业大学 | A kind of wide angle circular polarized antenna of omnidirectional wide band |
| CN108832308B (en) * | 2018-06-27 | 2020-04-17 | 安徽农业大学 | Omnidirectional broadband wide-angle circularly polarized antenna |
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