CN109411870B - Dual-frequency shared parabolic antenna feed source - Google Patents
Dual-frequency shared parabolic antenna feed source Download PDFInfo
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- CN109411870B CN109411870B CN201811288004.9A CN201811288004A CN109411870B CN 109411870 B CN109411870 B CN 109411870B CN 201811288004 A CN201811288004 A CN 201811288004A CN 109411870 B CN109411870 B CN 109411870B
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- circular waveguide
- feed source
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- 230000005855 radiation Effects 0.000 claims abstract description 29
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000007747 plating Methods 0.000 claims description 4
- 239000004962 Polyamide-imide Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 claims description 3
- 229920002312 polyamide-imide Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000000644 propagated effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
-
- 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
-
- 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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
Abstract
The invention discloses a double-frequency shared parabolic antenna feed source, which is characterized by comprising the following components: the circular waveguide tube, the dielectric rod, the radiation horn, the dielectric support structure, the secondary reflection surface and the reflection surface form a dielectric rod antenna feed source type, the circular waveguide tube, the radiation horn, the dielectric support structure and the secondary reflection surface form a loop focal antenna feed source type, the radiation of the dielectric rod antenna type is a high frequency band, the radiation of the loop focal antenna type is a low frequency band, and the two radiation types share the same reflection surface. The invention adopts a design mode that the dielectric rod antenna feed source and the loop focal antenna feed source are combined into a whole, and the dielectric rod antenna feed source and the loop focal antenna feed source independently correspond to different frequency bands to work, share the same reflecting surface, and can simultaneously apply a plurality of frequency bands.
Description
Technical Field
The invention relates to the technical field of communication antenna equipment, in particular to a double-frequency shared parabolic antenna feed source.
Background
Parabolic antennas are one of the earliest antenna types in antenna feed systems in the field of communications. The parabolic antenna reflects electromagnetic waves emitted from a feed source located at a focus toward the front and holds them in phase, thereby forming a highly directional beam, or converging a parallel beam at the focus. The high directivity is the most remarkable characteristic, and is therefore often applied to high gain occasions such as radio astronomical telescopes, satellite ground receiving stations, fire control radars, microwave relay transmission and the like. Among the many applications, microwave relay transmission is currently the most commonly used and most concentrated application of parabolic antennas. The parabolic antenna is basically installed at the high empty position such as iron tower, high roof, etc. With the development of communication systems at present, site placement is more and more dense, the installation position resources of antennas are also more and more tense, the same installation space is used, more antennas can be arranged or more spectrum resources can be utilized, and the method is an important direction of current research and development. The same antenna structure main body can simultaneously apply a plurality of frequency bands, which is a means commonly used at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the double-frequency shared parabolic antenna feed source which has the advantages of simple structure, low cost and easy realization of performance.
In order to achieve the above purpose, the invention adopts the following technical scheme. A dual-frequency shared parabolic antenna feed, comprising: the circular waveguide tube, the medium rod, the radiation horn, the medium supporting structure, the auxiliary reflecting surface and the reflecting surface form a medium rod antenna feed source type, the circular waveguide tube, the radiation horn, the medium supporting structure and the auxiliary reflecting surface form a ring focus antenna feed source type, the medium rod antenna feed source type and the ring focus antenna feed source type form a radiation part, the medium rod antenna type radiation is a high frequency band, the ring focus antenna type radiation is a low frequency band, the two radiation types share the same reflecting surface, the reflecting surface is connected with the medium supporting structure, the circular waveguide tube of the high frequency band is nested in the circular waveguide tube of the low frequency band, and the two circular waveguide tubes are concentric.
As a further illustration of the above, the dimensions of the circular waveguide are chosen to ensure that the main mode of propagation in the operating frequency band is the TE11 mode.
Further, the main mode of the medium rod propagating in the working frequency band is an EH11 mode.
Furthermore, the dielectric rod is made of materials with low loss and dielectric constant epsilon r, easy processing and low price, such as polytetrafluoroethylene, polyethylene, polystyrene, polyamide/polyimide and cyanate.
Further, the medium rod is partially inserted into the circular waveguide tube, the standing wave of the feed source is regulated at the inner part of the tube, and the wave propagated in the medium rod is ensured to be a pure traveling wave by adopting a gradually-reduced structure at the outer part of the tube. It is high frequency band for energy guiding.
Further, the radiation horn is formed by partially plating metal on the surface of the medium supporting structure.
Furthermore, the dielectric support structure is made of materials with low loss and dielectric constant epsilon r, easy processing and low price, and has the functions of adjusting phase and standing waves besides the function of supporting the auxiliary reflecting surface.
Further, the medium supporting structure comprises an inner cylindrical medium matching section and an outer conical medium radiator which are sequentially arranged along the axial direction, and the inner cylindrical medium matching section is inserted into the circular waveguide tube to realize impedance matching; the medium wall is formed by the hollow inside of the medium radiator, the inside of the medium wall is a cavity, the structure is a smooth surface wall or a structure for carrying out geometric shaping, and the structure can be used for adjusting the phase and the primary direction diagram.
Further, the secondary reflecting surface is laid on the inner wall and/or the outer wall of the circular waveguide. Further, the surface of the reflecting surface is geometrically shaped, mainly to control the reflection of energy onto the main reflecting surface of the parabolic antenna.
The beneficial effects of the invention are as follows:
1. the design mode that the dielectric rod antenna feed source and the loop focal antenna feed source are combined into a whole is adopted, the dielectric rod antenna feed source and the loop focal antenna feed source independently correspond to different frequency bands to work, the dielectric rod antenna feed source and the loop focal antenna feed source share the same reflecting surface, and the same antenna structure main body can be used for a plurality of frequency bands at the same time.
2. The transmission sections of the two frequency bands adopt circular waveguide transmission, the circular waveguide of the high frequency band is nested in the circular waveguide of the low frequency band, and the circular waveguide are concentric, and the transmission of the two frequency bands can be independently carried out through the structure.
Drawings
Fig. 1 is an external view of a dual-frequency shared parabolic antenna feed.
Fig. 2 is a cross-sectional view of a dual-frequency shared parabolic antenna feed.
Fig. 3 is a schematic diagram of a dielectric rod antenna feed type structure.
Fig. 4 is a schematic diagram of a structure of a feed type of a loop focal antenna.
Fig. 5 shows S-parameter diagrams of two frequency bands of 15ghz &80ghz dual frequency feed.
Fig. 6 shows the radiation pattern of a feed in two frequency bands of a 15ghz &80ghz dual frequency feed.
Reference numerals illustrate: 1: round waveguide tube, 2: media lever, 3: radiation horn, 4: medium supporting structure, 4-1: inner cylinder medium matching section, 4-2: an outside cone medium radiator, 5: secondary reflective surface, 6: a reflective surface.
Description of the embodiments
The present technical solution is described in detail below with reference to specific embodiments.
For the purpose of facilitating a better understanding of the nature of the present invention, a detailed description of embodiments of the invention is provided below in conjunction with the accompanying drawings.
As shown in fig. 1-2, a dual-frequency shared parabolic antenna feed, comprising: the circular waveguide 1, the dielectric rod 2, the radiation horn 3, the dielectric support structure 4, the secondary reflection surface 5 and the reflection surface 6 form a dielectric rod antenna feed source type, the circular waveguide 1, the radiation horn 3, the dielectric support structure 4 and the secondary reflection surface 5 form a loop focus antenna feed source type, the dielectric rod antenna feed source type and the loop focus antenna feed source type form a radiation part, the dielectric rod antenna type radiation is a high-frequency band, the loop focus antenna type radiation is a low-frequency band, the two radiation types share the same reflection surface 6, the reflection surface 6 is connected with the dielectric support structure 4, the circular waveguide 1 of the high-frequency band is nested in the circular waveguide 1 of the low-frequency band, and the two circular waveguides are concentric.
As shown in fig. 3, the feed source type of the dielectric rod antenna is composed of a circular waveguide tube 1, a dielectric rod 2 and a secondary reflecting surface 5, wherein the dielectric rod 2 is used for guiding energy in a high frequency band, the dielectric rod 2 is partially inserted into the circular waveguide tube 1, the standing wave of the feed source is regulated in the tube, and the wave propagating in the dielectric rod 2 is ensured to be a pure traveling wave by adopting a gradually-reduced structure outside the tube.
As shown in fig. 4, the feed type of the circular focus antenna is composed of a circular waveguide tube 1, a radiation horn 3, a medium supporting structure 4 and a secondary reflecting surface 5, wherein the medium supporting structure 4 comprises an inner cylindrical medium matching section 4-1 and an outer conical medium radiator 4-2 which are sequentially arranged along the axial direction, and the inner cylindrical medium matching section 4-1 is inserted into the circular waveguide tube 1 to realize impedance matching; the inside of the conical medium radiator 4-2 outside the pipe is hollow to form a medium wall, the inside of the medium wall is a cavity, the structure is a smooth surface wall or a structure for geometric shaping, and the structure can adjust the phase and the primary direction diagram; the radiation horn 3 is formed by metal plating partly on the surface of the dielectric support structure 4.
As shown in fig. 5-6, the reflection coefficient |S11| of the two frequency bands can be lower than-14 dB when the scheme is applied to the electric performance data of 14.4 GHz-15.35 GHz and 71 GHz-86 GHz. In addition, the whole in-band pattern has good amplitude flatness, smaller side lobes and back lobes, and high gain efficiency.
When the feed source is particularly operated, the implementation mode of the whole feed source scheme is that low-frequency electric signals are transmitted from the circular waveguide tube, a coaxial-line-like structure is formed between the circular waveguide tube and the circular waveguide tube, and energy is transmitted between the two circular waveguide tube walls. The signal is radiated after reaching the radiation horn, and is radiated to the reflecting surface, and is reflected to the main reflecting surface of the parabolic antenna through the reflecting surface; the high-frequency electric signal is transmitted from the circular waveguide tube, guided by the medium rod after reaching the medium rod, radiated by the other end, and reflected to the main reflecting surface after being radiated to the reflecting surface, so that the same antenna structure main body is realized, and a plurality of frequency bands can be simultaneously applied.
The above embodiments are described in detail for the essence of the present invention, but the scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that many improvements and modifications can be made without departing from the scope of the invention as defined in the claims.
Claims (10)
1. A dual-frequency shared parabolic antenna feed, comprising: the circular waveguide tube, the medium rod, the medium supporting structure and the auxiliary reflecting surface form a medium rod antenna feed source type, the circular waveguide tube, the medium rod, the medium supporting structure and the auxiliary reflecting surface form a ring focus antenna feed source type, the medium rod antenna feed source type and the ring focus antenna feed source type form a radiation part, the medium rod antenna type radiation is a high frequency band, the ring focus antenna type radiation is a low frequency band, the two radiation types share the same reflecting surface, the reflecting surface is connected with the medium supporting structure, the circular waveguide tube of the high frequency band is nested in the circular waveguide tube of the low frequency band, and the two circular waveguide tubes are concentric;
the dielectric rod antenna feed source type consists of a circular waveguide tube, a dielectric rod and a secondary reflecting surface, wherein the dielectric rod is used for conducting energy in a high frequency range, the dielectric rod is partially inserted into the circular waveguide tube, the inside part of the dielectric rod antenna feed source type is used for adjusting the feed source standing wave, and the outside part of the dielectric rod antenna feed source type adopts a gradually-decreasing structure to ensure that waves propagated in the dielectric rod are pure traveling waves; the circular focus antenna feed source type consists of a circular waveguide tube, a radiation horn, a medium supporting structure and a secondary reflecting surface, wherein the medium supporting structure comprises an inner cylindrical medium matching section and an outer conical medium radiator which are sequentially arranged along the axial direction, and the inner cylindrical medium matching section is inserted into the circular waveguide tube to realize impedance matching; the medium wall is formed by the hollow inside of the conical medium radiator outside the pipe, the inside of the medium wall is a cavity, the structure is a smooth surface wall or a structure for carrying out geometric shaping, and the structure can be used for adjusting the phase and the primary directional diagram; the radiation horn is formed by partially plating metal on the surface of the medium supporting structure.
2. A dual frequency shared parabolic antenna feed according to claim 1, wherein the primary mode of the circular waveguide selected to be dimensioned to propagate in the operating frequency band is the TE11 mode.
3. A dual-frequency shared parabolic antenna feed according to claim 1, wherein the main mode of propagation of the dielectric rod in the operating frequency band is EH11 mode.
4. The dual-frequency shared parabolic antenna feed according to claim 1, wherein the dielectric rod is made of a material with low loss and dielectric constant epsilonr, such as polytetrafluoroethylene, polyethylene, polystyrene, polyamide/polyimide, and cyanate.
5. A dual frequency shared parabolic antenna feed according to claim 1, wherein said dielectric rod portion is inserted into a circular waveguide.
6. A dual frequency shared parabolic antenna feed according to claim 1, wherein the radiating horns are formed by metal plating of portions of the surface of the dielectric support structure.
7. The dual-frequency shared parabolic antenna feed according to claim 1, wherein the dielectric support structure is made of a material with low loss and dielectric constant epsilonr, such as polytetrafluoroethylene, polyethylene, polystyrene, polyamide/polyimide, and cyanate.
8. The dual-frequency shared parabolic antenna feed according to claim 1, wherein the dielectric support structure comprises an inner cylindrical dielectric matching section and an outer conical dielectric radiator which are sequentially arranged along the axial direction, and the inner cylindrical dielectric matching section is inserted into the circular waveguide; the medium wall is formed by the hollow inside of the medium radiator, the inside of the medium radiator is a cavity, and the structure is a smooth surface wall or a geometrically shaped structure.
9. A dual frequency shared parabolic antenna feed according to claim 1, wherein the surface of the reflecting surface is geometrically shaped.
10. A dual frequency shared parabolic antenna feed according to claim 1, wherein the secondary reflecting surface is applied to the inner and/or outer walls of the circular waveguide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811288004.9A CN109411870B (en) | 2018-10-31 | 2018-10-31 | Dual-frequency shared parabolic antenna feed source |
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| CN201811288004.9A CN109411870B (en) | 2018-10-31 | 2018-10-31 | Dual-frequency shared parabolic antenna feed source |
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| CN109411870A CN109411870A (en) | 2019-03-01 |
| CN109411870B true CN109411870B (en) | 2023-12-15 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112490674B (en) * | 2020-11-06 | 2021-12-03 | 电子科技大学 | Low-focal-diameter-ratio reflector antenna based on double-frequency feed source feed |
| EP4231457A4 (en) * | 2020-11-20 | 2023-12-13 | Huawei Technologies Co., Ltd. | Dual-frequency feed source and dual-frequency antenna |
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