CN112086724A - Dextrorotation circular polarized antenna - Google Patents
Dextrorotation circular polarized antenna Download PDFInfo
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- CN112086724A CN112086724A CN202011174538.6A CN202011174538A CN112086724A CN 112086724 A CN112086724 A CN 112086724A CN 202011174538 A CN202011174538 A CN 202011174538A CN 112086724 A CN112086724 A CN 112086724A
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- waveguide
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—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
- H01Q13/0233—Horns fed by a slotted waveguide array
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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
- H01Q13/0241—Waveguide horns radiating a circularly polarised wave
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention provides a right-hand circularly polarized antenna based on a slot waveguide technology, which consists of a first layer of radiation layer, a second layer of slot gap waveguide and a third layer of ridge gap waveguide, wherein the radiation layer, the slot gap waveguide and the ridge gap waveguide are assembled into the antenna by screws, the bottom of the second layer of slot gap waveguide is a four-in-one power distribution network, and the third layer of ridge gap waveguide forms a series feed layer.
Description
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a right-hand circularly polarized antenna based on a slot waveguide technology.
Background
With the development of satellite communication and network technology, the system integration and functional requirements are gradually increased, radar target signals exist in a wider frequency band range, and diversity of polarization forms also develops, so that the antenna has the characteristics of wide frequency band, high gain, easiness in processing and manufacturing and the like. Since the circularly polarized antenna can receive any linearly polarized wave and can effectively reduce the multipath effect and the faraday rotation effect, the circular polarization is widely used in various communication fields. However, the gain of the existing circularly polarized microstrip antenna is only 4-6 dB generally, and the radiation efficiency is low, so that the performance index requirements of most current communication systems cannot be met.
Slot array antennas generally provide high efficiency, high gain antennas, and the existing processing techniques include: diffusion bonding, vacuum bonding, and micro-machining, however, these require high manufacturing costs.
In view of the above, there is a need in the art to design a high-gain circular polarized antenna that is easy to array and integrate.
Disclosure of Invention
In view of this, the invention provides a right-hand circularly polarized antenna based on the slot waveguide technology, which can realize high gain on the basis of easy processing.
The technical scheme for realizing the invention is as follows:
the right-hand circularly polarized antenna is composed of a radiation layer of a first layer, a slot gap waveguide of a second layer and a ridge gap waveguide of a third layer, wherein the radiation layer, the slot gap waveguide and the ridge gap waveguide are assembled into the right-hand circularly polarized antenna through screws.
Furthermore, the slot gap waveguide of the second layer forms a four-in-one power distribution network at the bottom, and the ridge gap waveguide of the third layer forms a series feed layer.
Furthermore, the radiation layer, the slot gap waveguide and the ridge gap waveguide are penetrated through by the metalized through hole array, and the ridge gap waveguide is provided with a feed column mounting hole.
Further, the distances between the feed column mounting hole and the edge where the metalized through hole array is located are 48.7mm and 2.4mm respectively.
Furthermore, the radiation layer, the slot gap waveguide and the ridge gap waveguide are all metal plates.
Further, the metal plate is made of aluminum.
Furthermore, the slot gap waveguide is formed by arranging metal columns with the length of 1.4mm, the width of 1.4mm and the height of 1.4mm in a period of 2.8mm, the distance between the metal columns and the metal plate of the second layer is 0.05mm, and the width of the slot gap waveguide is 5mm and the height of the slot gap waveguide is 1.3 mm.
Furthermore, the ridge slot waveguide is formed by arranging metal columns with the length of 1.4mm, the width of 1.4mm and the height of 2.5mm in a period of 2.4mm, and the distance between the metal columns and the metal plate of the third layer is 0.05 mm.
Further, the ridge slot waveguide has a ridge length of 30.5mm, a ridge width of 1.3mm, and a ridge height of 1.43 mm.
Further, the slot and slot waveguide further comprises a radiation slot with the length of 6.55mm and the width of 5.1 mm.
The invention realizes high gain on the basis of simplifying antenna processing and manufacturing, and simultaneously reduces the design complexity of the antenna and the design cost.
Drawings
Fig. 1 is a top view of a first layer of an antenna array of the present invention.
Fig. 2 is a top view of a second layer of the antenna array of the present invention.
Fig. 3 is a top view of a third layer of the antenna array of the present invention.
Fig. 4 is a graph of the reflection coefficient of the antenna array of the present invention.
Fig. 5 is a graph of the gain of an antenna array of the present invention.
Fig. 6 is a graph of the axial ratio of the antenna array of the present invention.
Fig. 7 is an antenna array radiation pattern of the present invention.
Description of the drawing reference numbers: 1: an array of metallized vias; 2: a feed post mounting hole; 3: a one-to-four power distribution network.
Detailed Description
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and while the invention will be described in connection with the preferred embodiments, it will be understood by those skilled in the art that these embodiments are not intended to limit the invention to these embodiments, but on the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
The invention provides a circularly polarized antenna with easy installation and high gain characteristics, which is realized by mainly depending on two mutually orthogonal electric field components radiated by the antenna, wherein the two components have equal amplitudes and 90-degree phase difference, based on the basic slot waveguide theory, a frequency stop band can be established by an ideal electric conductor (PEC) plate and an ideal magnetic conductor (PMC) plate, if the distance between the two flat plates is less than the corresponding 1/4 working wavelength, all electromagnetic wave modes can be stopped, however, the ideal magnetic conductor does not exist in reality, and an ideal semiconductor can be simulated by a metal column or a mushroom-shaped structure.
The invention designs a circular polarization antenna based on slot waveguide technology, the structure is divided into a radiation layer and two layers of power distribution networks, please refer to fig. 1, the first layer is a radiation layer, further refer to fig. 2, the second layer of the antenna array of the invention is a top view, and the third layer of the antenna array is a top view, the second layer and the third layer are used as feeding networks of the antenna, the radiation layer of fig. 1 realizes right-hand circular polarization electromagnetic wave through a hexagonal coupling hole, the two layers of feeding networks of the second layer and the third layer are respectively composed of a slot gap waveguide (GGW) of the second layer and a Ridge Gap Waveguide (RGW) of the third layer, wherein the bottom part formed by the slot gap waveguide (GGW) of the second layer is a four-in-one power distribution network 3, the ridge waveguide of the third layer is a series feeding layer, the three layers of the first layer to the third layer are penetrated by a metallized through hole array 1, the bottommost layer is provided with a feed column mounting hole 2.
The slot gap waveguide of fig. 2 is composed of metal posts with a length of 1.4mm, a width of 1.4mm and a height of 1.4mm arranged periodically at a distance of 2.8mm, and the distance between the metal posts and the second layer of metal plate is 0.05 mm; the width of the slot-slot waveguide is5mm and 1.3mm in height; the ridge slot waveguide of the third layer is formed by arranging metal columns with the length of 1.4mm, the width of 1.4mm and the height of 2.5mm in a period of 2.4mm, and the distance between the metal columns and the metal plate of the third layer is 0.05 mm; the third layer of ridge-gap waveguide is at a distance X d10 coupling holes are symmetrically arranged along the y axis at positions of = 34mm and-34 mm respectively, and the distance between the adjacent coupling holes is dy= 6.55mm, i.e. 0.764 times wavelength, the coupling apertures are respectively in theta1= 1.5°、θ2= -31.2°、θ3= 31.2°、θ4= -17°、θ5= 17 ° clockwise rotation; furthermore, a pair of ridges with the length of 30.5mm, the width of 1.3mm and the height of 1.43mm are arranged at two ends of each coupling hole in a mirror symmetry mode along the x-axis direction, and two rows of metal columns are used for separating adjacent ridges; each ridge passing through 10 spaces dxThe 10 hexagonal radiation slots are excited by the coupling holes with the width of 7.35mm in a one-to-one correspondence mode, the long side L1 of each radiation slot is 6.55mm, and the wide side W1 of each radiation slot is 5.1mm, namely the top radiation layer consists of 20 × 10 coupling holes and radiation slots; all the above-mentioned structures of the first to third layers can be assembled together to form the entire array antenna only by screws without welding.
Further, the material of the first layer to the third layer of metal structures is aluminum.
Further, the distances between the feeding column mounting hole 2 and the side where the metallized through hole array 1 is located are 48.7mm and 2.4mm respectively.
Further, for a right-hand circularly polarized antenna with the working center frequency of 35GHz, the length of the radiation layer of the first layer is 140mm, the width of the radiation layer is 80mm, and the height of the radiation layer is 6.5 mm; the power distribution layer composed of the slot gap waveguides of the second layer has the length of 167mm, the width of 110mm and the height of 4.3 mm; the length, the width and the height of a series feed layer formed by the ridge slot waveguides of the third layer are 140mm, 80mm and 3.65mm respectively;
with further reference to fig. 4, a reflection coefficient curve of the antenna array of the present invention, fig. 5, an antenna array gain curve of the present invention, fig. 6, an axial ratio curve of the antenna array of the present invention, and fig. 7, the antenna array radiation pattern of the present invention respectively corresponds to a reflection coefficient curve, a gain curve, an axial ratio curve of the finally designed right-hand circularly polarized antenna based on the slot waveguide structure, and an antenna array radiation pattern at 30GHz, and the performance thereof is as follows:
(1) the return loss bandwidth of the antenna is 3GHz (34 GHz to 37 GHz), the test result and the simulation result have good conformity, and the measured insertion loss is slightly larger than the simulation loss due to the manufacturing tolerance of the three-layer structure and the insufficient alignment precision between layers during assembly, as shown in a reflection coefficient curve chart of FIG. 4.
(2) The gain curve of the antenna array for the gain simulation and test within the effective bandwidth is shown in fig. 5, wherein the gain is greater than 31 dBi from 34.5 to 37GHz, the maximum gain reaches 31.5dBi at 35.5 GHz, the test result and the simulation result have better conformity, and the measured gain is slightly attenuated due to the extra conductor loss caused by the reduction of the conductivity of aluminum along with the surface roughness.
(3) The axial ratio is less than 2 dB in the whole operating frequency band, and reaches a minimum of 0.3 dB at 35.5 GHz, as shown in the graph of the axial ratio of the antenna array in fig. 6.
(4) The far field radiation pattern measured at 35.5 GHz is shown in the antenna array radiation pattern of figure 7 and is normalized by the maximum gain, with Half Power Bandwidths (HPBW) of the azimuth and elevation planes of 3.1 ° and 6.4 °, respectively.
Those skilled in the art will understand that the above parameters can be finely adjusted in limited experimental steps, so that the right-hand circularly polarized antenna of the present invention can be applied to different working scenarios by changing the working frequency, and these modifications all fall within the scope of the present invention.
Compared with the prior art, the invention has at least the following remarkable advantages: the antenna array is based on a slot waveguide structure, high gain is realized on the basis of simplifying processing and manufacturing, meanwhile, the design complexity of the antenna is reduced, and the design cost is reduced; in the working frequency band of the antenna, the highest gain reaches 31.5 dBi; in the processing and manufacturing process, firstly, the three-layer antenna structure is independently processed, complex processing technologies such as diffusion welding, vacuum welding or micro-processing are not needed, the three-layer antenna structure can be assembled together only by physical methods such as screws or bolts, the processing and manufacturing cost is greatly saved by the simple geometric structure and the installation steps, the antenna can be directly connected with a standard WR-28 waveguide port for testing and application, and the antenna has a good application prospect.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The right-hand circularly polarized antenna is characterized by comprising a first layer of radiation layer, a second layer of slot gap waveguide and a third layer of ridge gap waveguide, wherein the radiation layer, the slot gap waveguide and the ridge gap waveguide are assembled into the antenna by screws.
2. The right hand circularly polarized antenna of claim 1 wherein the slot waveguides of the second layer form a bottom-four-in-one power distribution network and the ridge waveguides of the third layer form a series feed layer.
3. The right hand circularly polarized antenna of claim 1 wherein the radiating layer, slot gap waveguide and ridge gap waveguide are perforated by an array of metallized through holes, the ridge gap waveguide having feed post mounting holes.
4. The right-hand circularly polarized antenna of claim 3, wherein the distance between the feed post mounting hole and the side where the array of metallized through holes is located is 48.7mm and 2.4mm, respectively.
5. The right hand circularly polarized antenna of claim 1 wherein the radiating layer, slot gap waveguide and ridge gap waveguide are all metal plates.
6. A right-hand circularly polarized antenna according to claim 5, wherein said metal plate is made of aluminum.
7. The right-hand circularly polarized antenna according to claim 1, wherein the slot waveguide is formed by arranging metal posts having a length of 1.4mm, a width of 1.4mm and a height of 1.4mm in a period of 2.8mm, the metal posts are spaced from the metal plate of the second layer by 0.05mm, and the slot waveguide has a width of 5mm and a height of 1.3 mm.
8. The right-hand circularly polarized antenna according to claim 1, wherein the ridge slot waveguide is formed by arranging metal posts having a length of 1.4mm, a width of 1.4mm and a height of 2.5mm in a period of 2.4mm, and the metal posts are spaced from the metal plate of the third layer by 0.05 mm.
9. The right-hand circularly polarized antenna of claim 1, wherein the ridge slot waveguide has a ridge length of 30.5mm, a ridge width of 1.3mm, and a ridge height of 1.43 mm.
10. The right hand circularly polarized antenna of claim 1 wherein the slot waveguide further comprises a radiating slot 6.55mm long and 5.1mm wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011174538.6A CN112086724A (en) | 2020-10-28 | 2020-10-28 | Dextrorotation circular polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011174538.6A CN112086724A (en) | 2020-10-28 | 2020-10-28 | Dextrorotation circular polarized antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112086724A true CN112086724A (en) | 2020-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011174538.6A Pending CN112086724A (en) | 2020-10-28 | 2020-10-28 | Dextrorotation circular polarized antenna |
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|---|---|
| CN (1) | CN112086724A (en) |
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2020
- 2020-10-28 CN CN202011174538.6A patent/CN112086724A/en active Pending
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