CN111725619B - Electric scanning antenna - Google Patents
Electric scanning antenna Download PDFInfo
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- CN111725619B CN111725619B CN202010586434.XA CN202010586434A CN111725619B CN 111725619 B CN111725619 B CN 111725619B CN 202010586434 A CN202010586434 A CN 202010586434A CN 111725619 B CN111725619 B CN 111725619B
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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
- H01Q1/002—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
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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
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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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
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
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Abstract
The invention relates to the field of antennas, in particular to an electric scanning antenna. Including antenna base and the radiating element who is used for transmitting signal, radiating element sets up on antenna base's last top surface and the domatic of following the upper top surface downwardly extending. The radiating elements of the planar electric scanning antenna for signal transmission are positioned on the same plane. The radiating units are distributed on the prismatic table or circular table-shaped antenna base, so that the radiating units form the three-dimensional electric scanning antenna, and the signal coverage range of the three-dimensional electric scanning antenna is larger than that of the planar electric scanning antenna.
Description
Technical Field
The invention relates to the field of antennas, in particular to an electric scanning antenna.
Background
An antenna, which is a component for transmitting or receiving radio waves, plays a significant role in a wireless communication system and is an indispensable constituent part of the wireless communication system. With the rapid development of high-frequency satellite communication systems, radars and wireless communication systems, especially the construction of global 4G and 5G networks, the requirements on antennas are also higher and higher. Due to such a demand, various types of electric scanning antennas have been developed vigorously.
The existing electric scanning antenna has small wave beam coverage range and can not realize signal omnidirectional coverage, thereby reducing the signal receiving and transmitting capacity of the electric scanning antenna.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides an electric-scan antenna, which increases a beam coverage of the electric-scan antenna, thereby improving a signal transceiving capability of the electric-scan antenna.
In order to realize the purpose, the invention adopts the following technical scheme:
an electric scanning antenna comprises an antenna base and a radiation unit for transmitting signals, wherein the radiation unit is arranged on the upper top surface of the antenna base and a slope surface extending downwards from the upper top surface.
Furthermore, the radiation unit comprises a horn structure, internal microstrip plates which are sequentially arranged in the horn structure along the axial direction of the horn structure, a bottom microstrip plate which is arranged at the bottom of the horn structure, and conductors which penetrate through the microstrip plates and are used for signal transmission;
the bottom microstrip plate is fixed on the antenna base, the size of a bottom opening of the horn structure facing the antenna base is smaller than that of a top opening, and the plate surface of each microstrip plate is perpendicular to the axial direction of the horn structure;
the surface of the internal microstrip plate facing the top opening of the horn structure is provided with a microstrip patch, and the conductor penetrates through the microstrip patch.
Further, the internal microstrip plate comprises a first microstrip plate, a second microstrip plate and a third microstrip plate which are sequentially arranged, wherein the first microstrip plate is close to the top opening of the horn structure, and the third microstrip plate is close to the bottom opening of the horn structure;
the microstrip patch comprises a first microstrip patch arranged on the upper plate surface of the first microstrip plate and a second microstrip patch arranged on the upper plate surface of the second microstrip plate, wherein the upper plate surface of the first microstrip plate and the upper plate surface of the second microstrip plate both face the top opening of the horn structure, and the first microstrip patch and the second microstrip patch are coaxially arranged;
or the microstrip patches comprise microstrip patches which are respectively arranged on the upper plate surface of the first microstrip plate, the upper plate surface of the second microstrip plate and the upper plate surface of the third microstrip plate, and all the microstrip patches are coaxially arranged.
Further preferably, the projection of the second microstrip patch on the first microstrip patch is located inside the first microstrip patch.
Preferably, the first microstrip patch and the second microstrip patch are both square, four edges of the first microstrip patch are provided with first matching blocks, and the length of the first matching blocks along the direction of the edges of the first microstrip patch is smaller than that of the edges of the first microstrip patch; and the second matching block is arranged at the position corresponding to the first matching block on the edge of the second microstrip patch, and the length of the second matching block along the direction of the edge of the second microstrip patch is less than the length of the edge of the second microstrip patch.
Further, the horn structure comprises a cylindrical section, and a circular platform section which is arranged on the upper part of the cylindrical section and is coaxial with the cylindrical section; the caliber of the circular platform section is gradually increased from one side close to the cylindrical section to one side far away from the cylindrical section;
the first microstrip plate, the second microstrip plate and the third microstrip plate are positioned on one side, far away from the circular table section, in the cylindrical section; the bottom microstrip plate is a fourth microstrip plate arranged at the bottom of the cylindrical section, and the projection of the cylindrical section on the fourth microstrip plate is positioned inside the fourth microstrip plate.
Furthermore, the conductors penetrating through the microstrip plates and the microstrip patches are metal columns; the electric scanning antenna also comprises a connector used for connecting a transmitting module and a receiving module of the antenna, a feed network is connected between the connector and the metal column, and the feed network is distributed on the lower plate surface of the fourth microstrip plate.
Further preferably, the number of the metal posts is two, and a region where the metal posts are in contact with the first microstrip patch and a region where the metal posts are in contact with the second microstrip patch form a feed point.
Preferably, the antenna base comprises a base main body in a shape of a frustum of a pyramid or a circular truncated cone, a cavity positioned inside the base main body, and a through hole arranged on the inner wall of the cavity, wherein an opening of the cavity is positioned on the lower bottom surface of the base main body; the radiation units are arranged on the upper top surface and the peripheral side surface of the base main body;
the radiation unit further comprises a shell fixed on the upper portion of the base main body, the cylindrical section and the fourth microstrip plate are located inside the shell, the fourth microstrip plate is fixed on the upper portion of the base main body, an opening communicated with the through hole is formed in the lower end face, facing the base main body, of the shell, and the fourth microstrip plate is located at the opening.
Preferably, the upper end surface of the housing is provided with a positioning cylinder with a cavity, the upper end surface of the housing is provided with an opening communicated with the positioning cylinder, and the circular platform section extends into the positioning cylinder through the opening.
The invention has the following beneficial effects:
(1) The radiating elements of the planar electric scanning antenna for signal transmission are positioned on the same plane. The antenna base comprises an upper top surface and a slope surface extending downwards from the upper top surface, the upper top surface and the slope surface are distributed on the radiating units, so that each radiating unit forms a three-dimensional electric scanning antenna, and the signal coverage range of the three-dimensional electric scanning antenna is larger than that of the planar electric scanning antenna.
In addition, the radiating elements of the invention are distributed on the sloping surface and the upper top surface of the antenna base in different directions, the radiating elements in different directions can be selected according to actual use requirements, and the directivity of signal transmission of the electric scanning antenna is increased.
(2) The radiating unit is formed by bonding four layers of microstrip boards and three layers of semi-curing boards, the upper board surfaces of the first microstrip board and the second microstrip board are provided with microstrip patches to form a radiating patch layer, and the lower board surfaces of the third microstrip board and the fourth microstrip board are feed network layers, so that the microstrip patches are arranged on the upper board surfaces of the first microstrip board and the second microstrip board, and the working bandwidth of the antenna is effectively increased on the premise of not increasing the size of the antenna.
(3) The horn structure of the radiation unit is gradually changed into a round table shape from a cylindrical bottom, so that the gain of the antenna is correspondingly improved on the premise of ensuring the beam width of the antenna, and the signal receiving and transmitting capacity of the antenna is improved.
(4) The invention is provided with two metal columns, each metal column respectively forms four feed points on the first microstrip patch and the second patch, and the four feed points are mutually matched, so that the circular polarization performance of an axial ratio less than 3 in a wide beam range of +/-50 degrees is realized, the loss caused by polarization mismatch is further reduced, and the signal receiving and transmitting capacity of the electric scanning antenna is improved.
(5) The size of the first microstrip patch positioned above is larger than that of the second microstrip patch positioned below, the two layers of patches complement each other, the first microstrip patch serves as a covering layer of the second microstrip patch, which is equivalent to a face mask, and the second microstrip patch serves as the ground of the first microstrip patch, so that the edge coupling between the two microstrip patches is reduced.
(6) The size of the microstrip patch is increased to reduce the high-frequency resonant frequency of the antenna, but the size of the antenna is increased due to the increase of the size of the microstrip patch. According to the invention, the rectangular matching blocks loaded on the four peripheral parts of the microstrip patch enable the antenna to reduce the high-frequency resonant frequency of the antenna while ensuring the original performance on the basis of not increasing the size of the microstrip patch, thereby achieving the purpose of reducing the size of the antenna.
(7) The cavity is arranged on the base main body, and the data lines of the receiving module and the transmitting module are conveniently connected to the radiating units.
(8) The cylinder with the cavity is matched with the boss on the radar equipment, so that other radio frequency modules and the antenna can be conveniently and better matched and connected, and the size of the whole machine is effectively reduced.
(9) The omnidirectional coverage of azimuth planes and the coverage of +/-75 degrees of pitching planes can be realized, and the beam pointing can be periodically switched according to the requirement, so that the effect of searching in the coverage range is achieved; meanwhile, the antenna can reside in a certain wave beam to realize the receiving or transmitting of signals. And the antenna adopts the design of a circularly polarized antenna, so that the problem of polarization mismatch when a signal is received is effectively solved.
Drawings
Fig. 1 is a structural view of an electric scanning antenna of the present invention;
FIG. 2 is a bottom view of the present invention shown in FIG. 1;
FIG. 3 is a top view of the present invention taken from FIG. 1 with the housing and positioning cylinder removed;
FIG. 4 is a block diagram of a radiating element of the present invention;
FIG. 5 is a top view of FIG. 4 of the present invention;
FIG. 6 is a graph of the standing wave of the electrically swept antenna of the present invention;
figure 7 is a radiation pattern of the electrically scanned antenna of the present invention;
fig. 8 is an axial ratio curve of the electric scanning antenna of the present invention.
The notations in the figures have the following meanings:
1-antenna base 11-base body 12-cavity 13-through hole
2-radiating element 21-shell 22-cylindrical section 23-circular truncated cone section 24-first microstrip plate
25-second microstrip plate 26-third microstrip plate 27-fourth microstrip plate 241-first microstrip patch
251-second microstrip patch 210-first prepreg 211-second prepreg
212-third prepreg 213-metal post 214-feed point 215-feed network
216-first mating block 217-second mating block 218-positioning slot
3-connector 4-positioning cylinder
Detailed Description
The technical solution of the present invention is clearly and completely described below with reference to the embodiments and the drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Examples
An electric scanning antenna comprises an antenna base 1 and a radiation unit 2 for transmitting signals, wherein the antenna base 1 comprises an upper top surface and a slope surface extending downwards from the upper top surface, in the embodiment, the antenna base 1 is in a frustum shape or a circular truncated cone shape, as shown in fig. 1, fig. 2 and fig. 3, and the radiation unit 2 is arranged on the upper top surface and the peripheral side surface of the antenna base 1.
As shown in fig. 1 and 2, the antenna base 1 includes a base body 11, a cavity 12 inside the base body 11, and a through hole 13 provided on an inner wall of the cavity 12. In this embodiment, the base body 11 is a seven-prism table, the number of the radiation units 2 is eight, and the radiation units 2 are respectively distributed on seven side surfaces and an upper bottom surface of the base body 11. An opening of the cavity 12 is provided on a lower bottom surface of the base body 11.
As shown in fig. 4, the radiation unit 2 includes a horn structure, microstrip plates sequentially disposed inside the horn structure along an axial direction of the horn structure, microstrip plates disposed at a bottom of the horn structure, and conductors for signal transmission passing through the microstrip plates, where the conductors are metal posts 213 in this embodiment.
The surface of the microstrip plate positioned in the horn structure and facing the opening at the top of the horn structure is provided with a microstrip patch. The metal posts 213 pass through the microstrip plate and the microstrip patch.
The horn structure comprises a cylindrical section 22, and a circular platform section 23 which is arranged on the upper part of the cylindrical section 22 and is coaxial with the cylindrical section 22; the diameter of the circular truncated cone section 23 gradually increases from the side close to the cylindrical section 22 to the side far away from the cylindrical section 22. The cylindrical section 22 and the circular truncated cone section 23 are both made of metal materials, the thickness of the metal copper is 2mm, the effect of the metal copper is to improve the gain of the antenna, and meanwhile, the mutual coupling between the radiation units 2 is reduced.
The cylindrical section 22 is located inside the housing 21, the lower part of the truncated cone section 23 is also located inside the housing 21, and the upper part of the truncated cone section 23 extends into the positioning cylinder 4 of the cavity.
As shown in fig. 4, the microstrip plates include a first microstrip plate 24, a second microstrip plate 25, a third microstrip plate 26, and a fourth microstrip plate 27, wherein the first microstrip plate 24, the second microstrip plate 25, and the third microstrip plate 26 are located inside the cylindrical section 22 at a position near the bottom, and the fourth microstrip plate 27 is located at the bottom of the cylindrical section 22. The first microstrip board 24 and the second microstrip board 25 are pressed together at high temperature through a first prepreg 210, the second microstrip board 25 and the third microstrip board 26 are pressed together at high temperature through a second prepreg 211, and the third microstrip board 26 and the fourth microstrip board 27 are pressed together at high temperature through a third prepreg 212. The first microstrip plate 24, the second microstrip plate 25, the third microstrip plate 26 and the fourth microstrip plate 27 are all circular, the radius of the fourth microstrip plate 27 is 3mm larger than that of the first microstrip plate 24, the second microstrip plate 25 and the third microstrip plate 26, and the edge of the fourth microstrip plate 27 is positioned on the outer side of the cylindrical section 22.
As shown in fig. 4 and 5, the upper plate surface of the first microstrip plate 24 is provided with a first microstrip patch 241, the upper plate surface of the second microstrip plate 25 is provided with a second microstrip patch 251, and both the upper plate surface of the first microstrip plate 24 and the upper plate surface of the second microstrip plate 25 face the top opening of the circular truncated cone segment 23. The first microstrip patch 241 and the second microstrip patch 251 are coaxially arranged, and the size of the first microstrip patch 241 is larger than that of the second microstrip patch 251. Microstrip patches can be arranged on the upper plate surface of the first microstrip plate 24, the upper plate surface of the second microstrip plate 25 and the upper plate surface of the third microstrip plate 26, and the microstrip patches are coaxially arranged.
As shown in fig. 4, the bottom of the metal pillar 213 is located on the fourth microstrip plate 27, the metal pillar 213 passes through each microstrip plate, each microstrip patch and each prepreg above the fourth microstrip plate 27, and the two metal pillars 213 form two feed points 214 on the first microstrip patch 241 and the second microstrip patch 251, respectively.
As shown in fig. 5, both the first microstrip patch 241 and the second microstrip patch 251 are square, a first matching block 216 is disposed on an edge of the first microstrip patch 241, a length of the first matching block 216 along the edge of the first microstrip patch 241 is smaller than a length of the edge of the first microstrip patch 241, a second matching block 217 is disposed at a position where the edge of the second microstrip patch 251 corresponds to the first matching block 216, and a length of the second matching block 217 along the edge of the second microstrip patch 251 is smaller than a length of the edge of the second microstrip patch 251.
As shown in fig. 5, the fourth microstrip plate 27 is provided with a positioning groove 218, the positioning groove 218 is located outside the cylindrical section 22, and the upper portion of the connector 3 is fixed inside the positioning groove 218. A feeding network 215 is connected between the connector 3 and the metal column 213, and the feeding network 215 is distributed on the lower plate surface of the fourth microstrip plate 27, so that the feeding network 215, the second microstrip patch 251 and the first microstrip patch 241 form a perpendicular relationship. The feed network 215 adopts a microstrip one-to-two Wilkinson power divider structure, the phase difference of two ports is designed to be 90 degrees, and the feed network has the function of synthesizing two linear polarization signals excited by different feeds into a circularly polarized signal.
When the antenna is installed, the transmitting module and the receiving module are fixed in the cavity 12, the transmitting module and the receiving module are connected with the connector 3, and then the cavity of the positioning cylinder 4 is aligned to a boss on the radar, so that the electric scanning antenna is convenient to install on a whole machine.
The transmitting module and the receiving module transmit signals to the electric scanning antenna of the invention through the connector 3, the first microstrip board 24 and the second microstrip board 25 are respectively loaded with the first microstrip patch 241 and the second microstrip patch 251 which are stacked up and down, the first microstrip board 24, the second microstrip board 25, the third microstrip board 26 and the fourth microstrip board 27 are pressed together at high temperature, and the two feeding points 214 on the first microstrip patch 241 and the second microstrip patch 251 represent different feeding positions. The first microstrip patch 241 excites a low frequency and the second microstrip patch 251 excites a high frequency. In general, the resonant frequency of the first microstrip patch 241 remains relatively constant, resulting in a frequency that is nearly equal to the resonant frequency that would result if the patch were a single layer, while the resonant frequency of the second microstrip patch 251 is affected by the size of the first microstrip patch 241, which affects the size of the resonant frequency that would result if the second microstrip patch 251 were to be varied in size once the size of the first microstrip patch 241 were changed. The antenna is designed to ensure that the size of the first microstrip patch 241 is as much as possible slightly larger than the size of the second microstrip patch 251. The first microstrip patch 241 and the second microstrip patch 251 supplement each other, and the first microstrip patch 241 serves as a covering layer of the second microstrip patch 251 and is equivalent to a mask; the second microstrip patch 251 acts as a ground for the first microstrip patch 241, reducing edge coupling.
FIG. 6 is a standing wave curve of the antenna of the present invention, wherein the standing wave ratio of the antenna is less than 2 in the frequency band of 10.6GHz to 13.8 GHz. phi =0 is the horizontal plane of the antenna, phi =90 is the elevation plane of the antenna, and fig. 7 is the radiation pattern of the antenna of the present invention, and on the premise of ensuring the beam width, the gain is 8.62dB, which is 1.56dB higher than that when the metal boundary of the horn structure is not added. FIG. 8 is an axial ratio curve of the antenna of the present invention, in the scanning range of + -30 degrees, the axial ratio is less than or equal to 1.43dB, in the scanning range of + -50 degrees, the axial ratio is less than or equal to 3dB, and a better circular polarization characteristic is realized.
Claims (9)
1. An electrically swept antenna, comprising: the antenna comprises an antenna base (1) and a radiation unit (2) for transmitting signals, wherein the radiation unit (2) is arranged on the upper top surface of the antenna base (1) and a slope surface extending downwards from the upper top surface;
the radiation unit (2) comprises a horn structure, internal microstrip plates, a bottom microstrip plate and conductors, wherein the internal microstrip plates are sequentially arranged in the horn structure along the axial direction of the horn structure, the bottom microstrip plate is arranged at the bottom of the horn structure, and the conductors penetrate through the microstrip plates and are used for signal transmission;
the bottom microstrip plate is fixed on the antenna base (1), the size of a bottom opening of the horn structure facing the antenna base (1) is smaller than that of a top opening, and the plate surface of each microstrip plate is perpendicular to the axial direction of the horn structure;
the surface of the internal microstrip plate, facing the opening at the top of the horn structure, is provided with a microstrip patch, and the conductor penetrates through the microstrip patch;
the horn structure comprises a cylindrical section (22), and a circular platform section (23) which is arranged on the upper part of the cylindrical section (22) and is coaxial with the cylindrical section (22); the caliber of the circular platform section (23) is gradually increased from one side close to the cylindrical section (22) to one side far away from the cylindrical section (22); the internal microstrip plate is positioned on one side, away from the circular table section (23), of the inside of the cylindrical section (22); the bottom microstrip plate is a fourth microstrip plate (27) arranged at the bottom of the cylindrical section (22).
2. The electric scanning antenna according to claim 1, wherein: the internal microstrip plate comprises a first microstrip plate (24), a second microstrip plate (25) and a third microstrip plate (26) which are sequentially arranged, the first microstrip plate (24) is close to the top opening of the horn structure, and the third microstrip plate (26) is close to the bottom opening of the horn structure;
the microstrip patch comprises a first microstrip patch (241) arranged on the upper plate surface of the first microstrip plate (24) and a second microstrip patch (251) arranged on the upper plate surface of the second microstrip plate (25), the upper plate surface of the first microstrip plate (24) and the upper plate surface of the second microstrip plate (25) both face towards the top opening of the horn structure, and the first microstrip patch (241) and the second microstrip patch (251) are coaxially arranged;
or the microstrip patches comprise microstrip patches which are respectively arranged on the upper plate surface of the first microstrip plate (24), the upper plate surface of the second microstrip plate (25) and the upper plate surface of the third microstrip plate (26), and all the microstrip patches are coaxially arranged.
3. The electrically scanned antenna as claimed in claim 2, wherein: the projection of the second microstrip patch (251) on the first microstrip patch (241) is located inside the first microstrip patch (241).
4. The electric scanning antenna according to claim 2 or 3, wherein: the first microstrip patch (241) and the second microstrip patch (251) are both square, four edges of the first microstrip patch (241) are provided with first matching blocks (216), and the length of each first matching block (216) along the edge direction of the first microstrip patch (241) is smaller than the length of the edge of the first microstrip patch (241); and a second matching block (217) is arranged at a position where the edge of the second microstrip patch (251) corresponds to the first matching block (216), and the length of the second matching block (217) along the direction of the edge of the second microstrip patch (251) is less than the length of the edge of the second microstrip patch (251).
5. The electrically scanned antenna as claimed in claim 2 or 3, wherein: the first microstrip plate (24), the second microstrip plate (25) and the third microstrip plate (26) are positioned on one side, far away from the circular table section (23), of the inside of the cylindrical section (22); the bottom microstrip plate is a fourth microstrip plate (27) arranged at the bottom of the cylindrical section (22), and the projection of the cylindrical section (22) on the fourth microstrip plate (27) is positioned inside the fourth microstrip plate (27).
6. The electrically scanned antenna as claimed in claim 5, wherein: the conductors passing through the respective microstrip plates and through the respective microstrip patches are metal posts (213); the electric scanning antenna further comprises a connector (3) used for connecting a transmitting module and a receiving module of the antenna, a feed network (215) is connected between the connector (3) and the metal column (213), and the feed network (215) is distributed on the lower plate surface of the fourth microstrip plate (27).
7. The electric scanning antenna according to claim 6, wherein: the number of the metal posts (213) is two, and the region of the metal posts (213) in contact with the first microstrip patch (241) and the region in contact with the second microstrip patch (251) form a feed point (214).
8. The electrically scanned antenna of claim 6, wherein: the antenna base (1) comprises a base main body (11) in a prismoid shape or a circular truncated cone shape, a cavity (12) positioned in the base main body (11), and a through hole (13) arranged on the inner wall of the cavity (12); the opening of the cavity (12) is positioned on the lower bottom surface of the base main body (11); the radiation units (2) are arranged on the upper top surface and the peripheral side surface of the base main body (11);
the radiating unit (2) further comprises a shell (21) fixed to the upper portion of the base main body (11), the cylindrical section (22) and the fourth microstrip plate (27) are located inside the shell (21), the fourth microstrip plate (27) is fixed to the outer wall of the base main body (11), an opening communicated with the through hole (13) is formed in the lower end face, facing the base main body (11), of the shell (21), and the fourth microstrip plate (27) is located at the opening.
9. The electrically scanned antenna of claim 8, wherein: the upper end face of the shell (21) is provided with a positioning cylinder (4) with a cavity, the upper end face of the shell (21) is provided with an opening communicated with the positioning cylinder (4), and the circular platform section (23) extends into the positioning cylinder (4) through the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586434.XA CN111725619B (en) | 2020-06-24 | 2020-06-24 | Electric scanning antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586434.XA CN111725619B (en) | 2020-06-24 | 2020-06-24 | Electric scanning antenna |
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| CN111725619A CN111725619A (en) | 2020-09-29 |
| CN111725619B true CN111725619B (en) | 2022-12-06 |
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| CN202010586434.XA Active CN111725619B (en) | 2020-06-24 | 2020-06-24 | Electric scanning antenna |
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| CN114447633B (en) * | 2022-04-08 | 2022-08-26 | 西安星通通信科技有限公司 | Beam wave direction calculation system and method of phased array antenna with circular truncated cone structure |
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