CN107069228B - Rectangular groove waveguide horn antenna - Google Patents
Rectangular groove waveguide horn antenna Download PDFInfo
- Publication number
- CN107069228B CN107069228B CN201710402414.0A CN201710402414A CN107069228B CN 107069228 B CN107069228 B CN 107069228B CN 201710402414 A CN201710402414 A CN 201710402414A CN 107069228 B CN107069228 B CN 107069228B
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- horn antenna
- matching
- conductor plate
- waveguide
- medium
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
- H01Q13/0233—Horns fed by a slotted waveguide array
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a rectangular slot waveguide horn antenna, which comprises an upper conductor plate and a lower conductor plate which are parallel to each other and are opposite to each other, wherein two side edges of the upper conductor plate and the lower conductor plate are supported and fixed through a medium supporting block, an upper convex part is arranged in the middle of the upper conductor plate in a convex way, and a lower convex part is arranged on the lower conductor plate in a convex way corresponding to the upper convex part; the upper convex part and the lower convex part are matched to form a rectangular groove waveguide and a horn antenna, and the rectangular groove waveguide is in transitional connection with the horn antenna; matching mediums are arranged in the upper protruding part and the lower protruding part, one end of each matching medium is arranged in the rectangular slot waveguide, and the other end of each matching medium is arranged in the horn antenna. The invention has the beneficial effects that the slot waveguide is adopted as a transmission line of microwave signals, so that larger power can be transmitted; a horn antenna in a rectangular slot waveguide structure form is realized; the use of a filler medium near the connection of the rectangular slot waveguide to the feedhorns improves the matching at that location and reduces the reflection coefficient, thereby enhancing the effective electromagnetic radiation.
Description
Technical Field
The invention relates to the technical field of rectangular slot waveguide horn antennas, in particular to a microwave transmitting and receiving device which works in the millimeter wave and sub-millimeter wave frequency range.
Background
In millimeter wave band, the transmission loss of coaxial lines and microstrip transmission lines is obviously increased, waveguide transmission lines such as rectangular waveguides and circular waveguides are mostly adopted, but the caliber sizes of the coaxial lines and the microstrip transmission lines are obviously reduced along with the increase of frequency, the power capacity is small, the high-end loss of the frequency is obviously increased, and the power capacity is limited. Tischer.F.J in 1952 first proposed the concept of slot waveguides, and Haris et al developed some rectangular slot waveguide elements later in the 70 s, and then slot waveguides of circular and other cross-sectional shapes were developed successively. In millimeter wave and sub-millimeter wave bands, the rectangular waveguide has smaller size, increases the processing difficulty, increases the transmission loss rapidly along with the frequency rise, reduces attenuation, has low dispersion and high power capacity, is convenient to process, and provides a selection direction for millimeter wave and sub-millimeter wave device design.
The horn antenna is a widely applied microwave antenna, and has simple structure and large power capacity, and the rectangular slot waveguide horn antenna is a horn mouth formed by expanding rectangular slot waveguides at a terminal in a gradually expanding way. The rectangular slot waveguide horn antenna also has the characteristics of rectangular slot waveguide, such as small frequency bandwidth, small attenuation and the like, and can be used as a primary radiator or a secondary radiator. The rectangular groove waveguide terminal is opened to form a horn antenna, the opening angle of the horn mouth is reasonably adjusted, the radiation characteristic of the horn can be controlled, and the direction of the horn mouth can form better electromagnetic wave directional radiation. However, the rectangular slot waveguide has a discontinuous structure and serious electromagnetic wave reflection when the size of the rectangular slot waveguide is changed at the position of opening the caliber; the terminal surface of horn mouth, electromagnetic wave outwards radiates from the opening part, and the impedance of loudspeaker and external space does not match, also has serious electromagnetic wave reflection. Therefore, the discontinuous horn size change and the reflection problem at the opening end face are also one of the problems of the horn antenna research.
Disclosure of Invention
The invention aims to solve the problems that the size of a rectangular groove waveguide of the traditional rectangular groove waveguide horn antenna is changed at the position of opening the caliber, and electromagnetic wave reflection exists; the terminal surface of the horn mouth also has the technical problem of serious electromagnetic wave reflection.
In order to achieve the above purpose, the rectangular slot waveguide horn antenna provided by the invention comprises an upper conductor plate and a lower conductor plate which are parallel to each other and are opposite in position, wherein two side edges of the upper conductor plate and the lower conductor plate are supported and fixed through a medium supporting block, an upper convex part is arranged in the middle of the upper conductor plate in a convex way, and a lower convex part is arranged on the lower conductor plate in a convex way corresponding to the upper convex part; the upper convex part and the lower convex part are matched to form a rectangular groove waveguide and a horn antenna, the rectangular groove waveguide is in transitional connection with the horn antenna, and the rectangular groove waveguide is parallel to the medium supporting block; matching mediums are arranged in the upper protruding part and the lower protruding part, one end of each matching medium is arranged in the rectangular slot waveguide, the other end of each matching medium is arranged in the horn antenna, at least one matching medium is arranged, and a gap is arranged between each matching medium.
The invention can be structurally seen as two parts: rectangular slot waveguides and feedhorns. The rectangular slot waveguide transmission line is the feed line portion of the antenna that transmits the emitted microwave energy to the horn antenna. The rectangular slot waveguide horn antenna is a horn mouth formed by expanding and extending rectangular slot waveguides at a terminal on the basis of rectangular slot waveguides, impedance change is caused by structural change on the interface between the rectangular slot waveguides and the horn antenna, and electromagnetic wave reflection can be caused by structural discontinuity; matching mediums are added in the rectangular groove waveguide and the horn antenna and used for adjusting impedance matching at the rectangular groove waveguide and the horn antenna, and reflection of electromagnetic waves is reduced.
Further, the rectangular slot waveguide horn antenna of the invention also comprises an end surface covering medium, and the end surface covering medium covers the end surface of the signal output end of the horn antenna. The dust impurity gets into numerous unknown interference and influence that the system can bring through the horn mouth, damages antenna system even, and port face cover medium is located on the terminal surface of groove waveguide horn mouth, can seal the horn mouth, guarantees the job stabilization of system, also has certain impedance matching effect simultaneously. The end face covering medium may also be smaller than the size of the output end face of the feedhorn.
The dielectric constants of the medium supporting block, the matching medium and the end surface covering medium are 2-5.
The thickness of the matching medium is 0.5 mm-3 mm, the part of the matching medium positioned in the rectangular groove waveguide is rectangular, and the part positioned in the horn antenna is trapezoidal. The matching medium consists of connected rectangular and trapezoidal plate-shaped materials, one side of the rectangle is connected with the upper bottom of the trapezoid and is equal to the upper bottom in length, the rectangular part matching medium is positioned in the rectangular groove, and the trapezoidal part matching medium is positioned in the horn antenna. The height of the matching medium near the interface of the slot waveguide and the horn can be full height or partial height, and the size, shape and filling of the matching medium can influence the adjustment of impedance matching. By adding the matching medium, the reflection of electromagnetic waves caused by discontinuity due to the expansion of the caliber of the waveguide is improved, and the effective radiation of the antenna is enhanced.
The matching medium may also be rectangular in shape, with a portion of the rectangle being in the rectangular slot and the remainder being in the feedhorn.
Further, silver plating or gold plating is performed on the inner surface of the rectangular groove waveguide. To increase the conductivity of the inner surface and thereby further reduce transmission losses.
Further, silver or gold plating is performed on the inner surface of the horn antenna.
The medium supporting block, the matching medium and the end surface covering medium are made of polytetrafluoroethylene. Polytetrafluoroethylene has good stability and electrical insulation, and is a material with low loss and low dielectric constant.
Further, the horn antenna is an E-plane sector horn, an H-plane sector horn or a pyramid horn.
Compared with the prior art, the invention has the beneficial effects that: the horn antenna realized by rectangular slot waveguide can realize the microwave transmission and reception in millimeter wave and submillimeter wave frequency ranges with larger power; the reflection problem between the rectangular slot waveguide and the horn antenna can be regulated and improved by adopting the matching medium, the size of the matching medium can be regulated, the quantity of the matching medium and the filling position can be properly selected, the impedance matching of the rectangular slot waveguide and the horn antenna can be flexibly regulated, the reflection condition of the rectangular slot waveguide and the horn antenna is reduced, the standing wave of the working frequency is improved, and the total effective radiation power is increased. The horn mouth is closed by the port surface covering medium, so that the interference or influence caused by impurities can be avoided, the working stability of the system is ensured, and meanwhile, the horn mouth has a certain impedance matching effect.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of the structure of the present invention;
FIG. 3 is a schematic representation of matching media shapes of the present invention;
FIG. 4 is a schematic representation of an end face cover media of the present invention;
FIG. 5 is a radiation simulation diagram of a rectangular slot waveguide horn antenna of the present invention;
FIG. 6 is a standing wave diagram of a port of a prior art slot waveguide feedhorn;
fig. 7 is a standing wave diagram of a port of a slot waveguide horn antenna according to an embodiment of the present invention.
The marks in the figure:
1. the antenna comprises an upper conductor plate, a lower conductor plate, a medium supporting block, a horn antenna, a rectangular slot waveguide, a matching medium and an end face covering medium.
Detailed Description
Further description is provided below in connection with the drawings and the specific embodiments.
As shown in fig. 1, in the invention, a rectangular slot waveguide horn antenna comprises an upper conductor plate 1 and a lower conductor plate 2 which are parallel to each other and are opposite to each other, wherein two side edges of the upper conductor plate and the lower conductor plate are supported and fixed by a medium supporting block 3, an upper convex part is arranged in the middle of the upper conductor plate in a convex way upwards, and a lower convex part is arranged on the lower conductor plate in a convex way corresponding to the upper convex part; the upper convex part and the lower convex part are matched to form a rectangular groove waveguide 5 and a horn antenna 4, and the rectangular groove waveguide 5 is in transitional connection with the horn antenna 4; rectangular slot waveguide 5 and horn antenna 4 internal surface silvered, match medium 6 one end in rectangular slot waveguide, another end in horn antenna. The output end face of the horn antenna 4 is provided with an end face covering medium 7, the shape of which is shown in fig. 4, and the end face covering medium 7 seals the horn mouth and has a certain impedance matching function. In this embodiment, the end surface covering medium and the medium supporting block are both polytetrafluoroethylene.
The specific dimensions of this embodiment are: the height of the rectangular groove bulge is 5mm, the width is 6mm, the total width of the rectangular groove waveguide is 52mm, the total length of the rectangular groove and the horn antenna is 27.4mm, the width of the medium supporting blocks at two sides is 5mm, and the height is 6mm. The horn antenna portion had an axial length of 7.5mm, a horn mouth width of 14.66mm and a horn mouth height of 26mm. The working center frequency is 50GHz, the gain of the slot waveguide horn antenna is shown in figure 6 through simulation, the maximum radiation direction is the axis direction of the slot waveguide horn, and the gain reaches 20dB.
The matching medium of this example has a relative dielectric constant of 3.48, a rectangular shape of 2mm x 8mm in size and a thickness of 1mm, and is located at the junction of the rectangular slot and the horn antenna, with a portion of the matching medium of this rectangular shape being in the rectangular slot and the remainder being in the horn antenna. After the matching medium is adopted, standing waves of the ports are improved.
The slot waveguide horn antenna has a discontinuous structure, the size change can cause reflection of electromagnetic waves, standing waves affecting ports, and the standing waves of ports of the slot waveguide horn antenna are shown in fig. 6. Because the interface between the rectangular slot waveguide and the horn antenna has impedance change due to structural change, the matching medium is added at the interface, so that the impedance can be changed, and the impedance matching at the interface can be adjusted. With the addition of a partial height of matching medium, the standing wave of the port is improved at the center frequency as shown in fig. 7.
The above examples are merely preferred examples and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. All changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (5)
1. A rectangular slot waveguide horn antenna, characterized in that: the device comprises an upper conductor plate and a lower conductor plate which are parallel to each other and are opposite in position, wherein two side edges of the upper conductor plate and the lower conductor plate are supported and fixed through medium supporting blocks, an upper convex part is arranged in the middle of the upper conductor plate in a convex manner upwards, and a lower convex part is arranged on the lower conductor plate in a convex manner corresponding to the upper convex part; the upper convex part and the lower convex part are matched to form a rectangular groove waveguide and a horn antenna, and the rectangular groove waveguide is in transitional connection with the horn antenna; matching mediums are arranged in the upper protruding part and the lower protruding part, one end of each matching medium is arranged in the rectangular slot waveguide, the other end of each matching medium is arranged in the horn antenna, the number of the matching mediums is at least one, and a gap is arranged between each two matching mediums;
the rectangular slot waveguide horn antenna also comprises an end surface covering medium, wherein the end surface covering medium covers the end surface of the signal output end of the horn antenna;
the thickness of the matching medium is 0.5 mm-3 mm, the part of the matching medium positioned in the rectangular groove waveguide is rectangular, and the part positioned in the horn antenna is trapezoidal;
the horn antenna is an E-plane sector horn, an H-plane sector horn or a pyramid horn.
2. The rectangular slot waveguide horn antenna of claim 1 wherein the dielectric constant of the dielectric support block, the matching dielectric and the end face covering dielectric is 2 to 5.
3. The rectangular slot waveguide feedhorn of claim 1 wherein the rectangular slot waveguide inner surface is silver plated or gold plated.
4. The rectangular slot waveguide feedhorn of claim 1 wherein the feedhorn inner surface is silver plated or gold plated.
5. The rectangular slot waveguide horn antenna of claim 2 wherein the dielectric support block, matching dielectric and end face cover dielectric are made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710402414.0A CN107069228B (en) | 2017-06-01 | 2017-06-01 | Rectangular groove waveguide horn antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710402414.0A CN107069228B (en) | 2017-06-01 | 2017-06-01 | Rectangular groove waveguide horn antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107069228A CN107069228A (en) | 2017-08-18 |
| CN107069228B true CN107069228B (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710402414.0A Active CN107069228B (en) | 2017-06-01 | 2017-06-01 | Rectangular groove waveguide horn antenna |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1487625A (en) * | 2003-09-04 | 2004-04-07 | 东南大学 | High-power circular slot waveguide antenna |
| JP2006324916A (en) * | 2005-05-18 | 2006-11-30 | Japan Radio Co Ltd | Antenna assembly and its dielectric member |
| CN103414026A (en) * | 2013-07-31 | 2013-11-27 | 南京理工大学 | Millimeter wave cone beam antenna based on circular waveguide TM0n model |
| CN103811876A (en) * | 2014-02-26 | 2014-05-21 | 中国工程物理研究院电子工程研究所 | Chip-medium filling horn antenna applied to terahertz wave band phase array |
| CN105024141A (en) * | 2015-07-13 | 2015-11-04 | 中国电子科技集团公司第十研究所 | Dielectric-filled circular waveguide circularly polarized antenna |
| CN105789904A (en) * | 2016-05-03 | 2016-07-20 | 南京信息职业技术学院 | Slot antenna based on rectangular groove waveguide |
| CN206758654U (en) * | 2017-06-01 | 2017-12-15 | 南京信息职业技术学院 | A kind of rectangular groove waveguide electromagnetic horn |
-
2017
- 2017-06-01 CN CN201710402414.0A patent/CN107069228B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1487625A (en) * | 2003-09-04 | 2004-04-07 | 东南大学 | High-power circular slot waveguide antenna |
| JP2006324916A (en) * | 2005-05-18 | 2006-11-30 | Japan Radio Co Ltd | Antenna assembly and its dielectric member |
| CN103414026A (en) * | 2013-07-31 | 2013-11-27 | 南京理工大学 | Millimeter wave cone beam antenna based on circular waveguide TM0n model |
| CN103811876A (en) * | 2014-02-26 | 2014-05-21 | 中国工程物理研究院电子工程研究所 | Chip-medium filling horn antenna applied to terahertz wave band phase array |
| CN105024141A (en) * | 2015-07-13 | 2015-11-04 | 中国电子科技集团公司第十研究所 | Dielectric-filled circular waveguide circularly polarized antenna |
| CN105789904A (en) * | 2016-05-03 | 2016-07-20 | 南京信息职业技术学院 | Slot antenna based on rectangular groove waveguide |
| CN206758654U (en) * | 2017-06-01 | 2017-12-15 | 南京信息职业技术学院 | A kind of rectangular groove waveguide electromagnetic horn |
Non-Patent Citations (1)
| Title |
|---|
| 圆形槽波导喇叭天线的研究;张照锋;《中小企业管理与科技(下旬刊)》;20100125(第01期);第174页 * |
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| CN107069228A (en) | 2017-08-18 |
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