CN117673724A - Microwave/millimeter wave dual-frequency dual-polarized antenna with dipole/transmission array multiplexing - Google Patents

Microwave/millimeter wave dual-frequency dual-polarized antenna with dipole/transmission array multiplexing Download PDF

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Publication number
CN117673724A
CN117673724A CN202311419923.6A CN202311419923A CN117673724A CN 117673724 A CN117673724 A CN 117673724A CN 202311419923 A CN202311419923 A CN 202311419923A CN 117673724 A CN117673724 A CN 117673724A
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dual
metal layer
millimeter wave
polarized
dipole
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马自龙
蒋婉玉
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South China University of Technology SCUT
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South China University of Technology SCUT
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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
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • 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
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole

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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The invention discloses a microwave/millimeter wave dual-frequency dual-polarized antenna for multiplexing a dipole/transmission array, which comprises a metal floor, a dual-polarized horn, a transmission array surface and two coaxial ports, wherein the transmission array surface is positioned above the metal floor, the dual-polarized horn is positioned below the metal floor, and the dual-polarized horn is used for feeding the transmission array surface; the two coaxial ports are arranged on the transmission array surface and are respectively used for feeding in horizontal and vertical polarization modes of the dipole antenna. The invention works in the form of dipole when the antenna works in the microwave frequency band, and works in the form of transmission array when the antenna works in the millimeter wave frequency band, so that microwave/millimeter wave dual-frequency dual-polarized radiation can be realized by equivalent transmission array as four arms of dual-polarized dipole antenna.

Description

Microwave/millimeter wave dual-frequency dual-polarized antenna with dipole/transmission array multiplexing
Technical Field
The invention relates to the technical field of antennas, in particular to a microwave/millimeter wave dual-frequency dual-polarized antenna with dipole/transmission array multiplexing.
Background
With the continuous development of mobile communication technology, the requirements of people on the transmission rate, bandwidth, delay and the like of a communication system are also higher and higher, and the working frequency band of the communication system is gradually developed from the microwave frequency band to the millimeter wave frequency band, but the strong development of the millimeter wave technology does not mean the thorough exit of the microwave frequency band, and conversely, the microwave frequency band as the gold frequency band of the communication still exists in the communication system due to the characteristics of high stability, high reliability and the like. Thus, microwave/millimeter wave coexistence is a major trend in future communication technology development, but at the same time, it also brings great challenges to the design of antenna systems.
The implementation of microwave/millimeter wave coexistence can choose to place the antennas of two frequency bands separately in the same antenna system, but this approach may lead to an increase in the size and complexity of the antenna system, and may also lead to a decrease in the antenna performance due to mutual coupling between the antenna structures of different frequency bands. In comparison, the common aperture scheme proposed in recent years is a better microwave/millimeter wave dual-frequency antenna scheme, and the idea is to organically combine two antennas of microwave and millimeter wave frequency bands together in a mode of structural multiplexing, so as to achieve the purposes of miniaturization, high integration, high performance and the like, for example: the structures multiplexing schemes of dipole/dipole array, slot antenna/slot antenna, patch antenna/dielectric resonator antenna and patch antenna/resonant cavity slot antenna are respectively proposed in the documents [1] to [4 ]. Although there are reports of not few related documents, there are still some problems worth solving: 1) Because the atmospheric attenuation of the millimeter wave frequency band is higher, the antenna in the frequency band usually needs to be realized by an antenna array with high gain, but in the traditional antenna array, a complicated feed network may cause additional feed loss, and meanwhile, the design difficulty also increases correspondingly, so how to realize high-gain radiation with low feed loss in the millimeter wave frequency band is a worth-to-be-discussed problem; 2) Most of the reported documents are single-line polarized or circularly polarized, dual-polarized microwave/millimeter wave dual-frequency common-caliber antennas are less proposed, and dual-polarized antennas are widely applied and commonly used for duplex communication, so that research on dual-polarized microwave/millimeter wave dual-frequency antennas has practical application value; 3) In the reported literature, although the microwave/millimeter wave dual-frequency function can be successfully realized, most designs are difficult to realize broadband and high-gain characteristics in two frequency bands of microwave and millimeter wave at the same time, and meanwhile, the pattern characteristics may be distorted due to the coupling between antenna structures.
[1]J.Lan,Z.Yu,J.Zhou,and W.Hong,“An aperture-sharing array for(3.5,28)GHz terminals with steerable beamin millimeter-wave band,”IEEE Transactions on Antennas and Propagation,vol.68,no.5,pp.4114-4119,May 2020.
[2]Q.J.Deng,Y.M.Pan,X.Y.Liu,and K.W.Leung,“A singly-fed dual-band aperture-sharing SIW cavity-backed slot antenna with large frequency ratio,”IEEE Transactions on Antennas and Propagation,vol.71,no.2,pp.1971-1976,Feb.2023.
[3]C.J.Ma,Y.M.Pan,X.Y.Meng,and S.Y.Zheng,“A microwave/millimeter-wave shared-aperture antenna based on slow-wave parallel-plate waveguide,”IEEE Transactions on Antennas and Propagation,pp.1-1,2023.
[4]J.H.Bae and Y.J.Yoon,“5G dual(S-/Ka-)band antenna using thick patch containing slotted cavity array,”IEEE Antennas and Wireless Propagation Letters,vol.20,no.6,pp.1008-1012,Jun.2021.
Disclosure of Invention
In order to solve at least one of the problems existing in the prior art, the invention provides a microwave/millimeter wave dual-frequency dual-polarized antenna with a dipole/transmission array multiplexing function. The antenna realizes microwave/millimeter wave dual-frequency dual-polarized radiation in a mode of equivalent transmission array as four arms of the dual-polarized dipole antenna. In the microwave frequency range, the antenna works in the form of dipole, and in the millimeter wave frequency range, the antenna works in the form of transmission array. Because the transmission array is adopted as the radiation structure in the millimeter wave frequency band, the invention can utilize the space feeding advantage of the transmission array antenna, get rid of a complex feeding network and further realize lower feeding loss. On the other hand, the invention can make the two antennas of microwave and millimeter wave frequency bands work in a relatively independent mode, so the invention inherits the broadband and high gain characteristics of the dipole antenna and the transmission array antenna, can realize better radiation performance in two frequency bands, and has the advantages of low feed loss, high structural multiplexing rate, broadband and high gain.
In order to achieve the aim of the invention, the microwave/millimeter wave dual-frequency dual-polarized antenna for multiplexing the dipole/transmission array comprises a metal floor, a dual-polarized horn, a transmission array surface and two coaxial ports,
the transmission array surface is positioned above the metal floor, the transmission array surface comprises a first dielectric plate, a second dielectric plate, a third dielectric plate, a fourth dielectric plate and a fifth dielectric plate, the lower surface of the first dielectric plate, the space between adjacent dielectric plates and the upper surface of the fifth dielectric plate are respectively provided with a metal layer, the metal layers are respectively defined as a first metal layer, a second metal layer, a third metal layer, a fourth metal layer, a fifth metal layer and a sixth metal layer, the second metal layer and the fifth metal layer are divided into four parts through gaps, the four parts are equivalent to four arms of a dual-polarized dipole antenna, the four arms comprise horizontally polarized dipole arms and vertically polarized dipole arms, a first rectangular patch is etched on the first metal layer, a first phase-shifting line is etched on the third metal layer, a second rectangular patch is etched on the fourth metal layer, the first rectangular patch is connected with the second rectangular patch through a third metal through hole, a fourth metal through hole and a first phase-shifting line, and a second rectangular antenna through a third rectangular through hole are connected with a second rectangular antenna through a third rectangular patch, and a third rectangular antenna through-through hole is connected with a fifth rectangular antenna through a polarization unit;
the dual-polarized horn is positioned below the metal floor and is used for feeding the transmission array surface;
the two coaxial ports are arranged on the transmission array surface and are respectively used for feeding in horizontal and vertical polarization modes of the dipole antenna.
Compared with the prior art, the invention at least has the following beneficial effects:
(1) Because the millimeter wave frequency band adopts the space feed transmission array antenna as the radiation structure, the invention has the advantages of simple feed and low feed loss in the millimeter wave frequency band. Through the structural multiplexing of the transmission array and the four arms of the dual-polarized dipole antenna, the antennas of the two frequency bands can work in a relatively independent mode, and then the coupling between the antenna structures is reduced. In addition, the invention has the characteristics of broadband and high gain in two frequency bands in the aspect of antenna performance. Compared with the reported documents, the invention has the advantages of high structural multiplexing rate, low feed loss and excellent performance.
(2) Structurally, the characteristics of simple antenna structure and high structure multiplexing rate are realized based on the combination of the dipole antenna and the transmission array antenna; the invention has the advantages of dual polarization, dual-band broadband, high gain, high isolation and low feed loss in performance.
Drawings
Fig. 1 is a schematic structural diagram of a microwave/millimeter wave dual-frequency dual-polarized antenna with dipole/transmission array multiplexing according to an embodiment of the present invention.
Fig. 2 is a top view of a dual-frequency dual-polarized antenna for microwave/millimeter waves with dipole/transmission array multiplexing according to an embodiment of the present invention.
Fig. 3 is a side view of a microwave/millimeter wave dual-frequency dual-polarized antenna with dipole/transmission array multiplexing according to an embodiment of the present invention.
Fig. 4 is an exploded view of a transmissive array panel in an embodiment of the invention.
Fig. 5 is an enlarged partial view of two coaxial ports in an embodiment of the invention.
Fig. 6 is an exploded view of a transmissive array unit in an embodiment of the present invention.
Fig. 7 is a schematic diagram of impedance matching characteristics of an antenna in a microwave band according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of gain characteristics of an antenna in horizontal polarization and vertical polarization of a microwave band according to an embodiment of the present invention.
Fig. 9 is a diagram of the E-plane ((a) view) and H-plane ((b) view) of the antenna in horizontal polarization in the microwave band according to an embodiment of the present invention.
Fig. 10 shows the vertical polarization of the antenna in the microwave band in the E-plane ((a) and H-plane ((b)) direction diagrams of the antenna according to the embodiment of the present invention.
Fig. 11 is a schematic diagram of impedance matching characteristics of an antenna at millimeter wave frequencies according to an embodiment of the present invention.
Fig. 12 is a graph showing gain characteristics of horizontal polarization and vertical polarization of an antenna in the millimeter wave band in an embodiment of the present invention.
Fig. 13 is a diagram of the E-plane ((a) view) and H-plane ((b) view) of the horizontal polarization of the antenna in the millimeter wave band in the embodiment of the present invention.
Fig. 14 is a diagram of the E-plane ((a) view) and H-plane ((b) view) of the antenna in the vertical polarization of the millimeter wave band in the embodiment of the present invention.
FIG. 15 is a graph illustrating the isolation between the high and low frequency ports of an antenna according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a microwave/millimeter wave dual-frequency dual-polarized antenna with a dipole/transmission array multiplexing function, wherein fig. 1 to 3 are respectively a full view, a top view and a side view of an antenna structure, the antenna comprises a metal floor 11, a dual-polarized horn 12, a transmission array surface 13 and two coaxial ports 14, wherein the two coaxial ports 14 are respectively used for feeding the dipole antenna in a horizontal polarization mode and a vertical polarization mode, and the dual-polarized horn 12 is used for feeding the transmission array. The dual-polarized horn 12 is placed below the metal floor 11, and a rectangular gap with the same caliber as the dual-polarized horn 12 is formed on the metal floor 11 for transmitting electromagnetic waves.
Fig. 4 is an exploded view of a transmissive array panel 13, the transmissive array panel 13 including five dielectric plates, respectively, a first dielectric plate 31, a second dielectric plate 32, a third dielectric plate 33, a fourth dielectric plate 34, and a fifth dielectric plate 35, in some embodiments of the present invention, the dielectric materials in the transmissive array panel 13 are Rogers5880, with dielectric constants and loss tangents of 2.2 and 0.0009, respectively, the first dielectric plate 31 and the fifth dielectric plate 35 having a thickness of 0.254mm, and the second dielectric plate 32, the third dielectric plate 33, and the fourth dielectric plate 34 having a thickness of 0.127mm. Each dielectric plate is provided with a metal layer, and the metal layers on the dielectric plates are a first metal layer 41, a second metal layer 42, a third metal layer 43, a fourth metal layer 44, a fifth metal layer 45 and a sixth metal layer 46 respectively. The second metal layer 42 and the fifth metal layer 45 are respectively etched with a first gap 25 and a second gap 26 along the direction of +/-45 degrees, the second metal layer 42 and the fifth metal layer 45 are divided into four diamond-shaped parts by the first gap 25 and the second gap 26, and the four diamond-shaped parts are respectively equivalent to four arms (21, 22, 23 and 24) of the dual-polarized dipole antenna.
In some embodiments of the present invention, fig. 5 is an enlarged view of a portion of two coaxial ports 14, a first coaxial connector 52 connects the horizontally polarized dipole arms (21, 23) with a first microstrip line 54 through a first metal via 55, and a second coaxial connector 51 connects the vertically polarized dipole arms (22, 24) with a second microstrip line 53 through a second metal via 56.
The transmissive array panel 13 includes a plurality of transmitting array units of a receiving/styling (Rx/Tx) type arranged in a linear form, wherein the transmitting array units are not disposed at positions where the first slit 25, the second slit 26 and the two coaxial ports 14 are disposed since the first slit 25, the second slit 26 and the two coaxial ports 14 are etched on the second metal layer 42 and the fifth metal layer 45. Fig. 6 is an exploded view of a transmissive array unit in which first rectangular patch 61 is etched in first metal layer 41, first phasing line 63 is etched in third metal layer 43, second phasing line 64 is etched in fourth metal layer 44, and second rectangular patch 66 is etched in sixth metal layer 46. The first rectangular patch 61 is a receiving unit, the second rectangular patch 66 is a transmitting unit, and the first rectangular patch 61 is connected with the second rectangular patch 66 through the third metal through hole 62, the fourth metal through hole 68 and the first phase shifting line 63 to realize the horizontal polarization function of the transmission array unit; the first rectangular patch 61 is connected to the second rectangular patch 66 through the fifth metal via 65, the sixth metal via 67 and the second phasing line 64 to realize the function of vertical polarization of the transmissive array unit. In addition, the transmissive array units differ only in the length of the phase shift line, which is determined by the amount of phase shift required for each transmissive array unit, the particular phase shift value following the fermat principle, i.e
Where x and y denote coordinates of a point on the transmissive array plane 13 in the x-direction and the y-direction, f is a focal length of the transmissive array 13, λ denotes a free space wavelength at a center frequency of the millimeter wave band,may be any initial phase; />I.e. the amount of phase shift required at point (x, y).
In some embodiments of the present invention, the transmissive array panel 13 includes 337 transmit array units of the receive/hairstyle (Rx/Tx) type arranged in a linear fashion.
In principle, since the frequency ratio of microwave and millimeter wave frequency bands is very high, part of the structures in the transmission array, such as: patches, through holes, microstrip lines, multi-layer board spacing and the like can be regarded as extremely small structures in the microwave frequency band, which do not affect the radiation of the microwave frequency band, but play a decisive role in the large-area metal parts in the array, namely the second metal layer 42 and the fifth metal layer 45, so that the transmission array can be equivalently used as a metal patch, wherein the transmission array is divided into four parts by a slotting method of the second metal layer 42 and the fifth metal layer 45 so as to form four arms of the microwave frequency band dual-polarized dipole antenna. When in microwave frequency range, the antenna is fed by the first coaxial connector 51 and the second coaxial connector 52, and the first coaxial connector 52 feeds the dipole double arms (21, 23) with horizontal polarization, so that the function of horizontal polarization of the microwave frequency range is realized; the second coaxial connector 51 feeds the vertically polarized dipole arms (22, 24) to achieve the function of vertical polarization in the microwave frequency band.
When in millimeter wave frequency range, the transmission array is fed by the dual-polarized horn 12, and electromagnetic energy is fed to the transmission array surface 13 through the space of the dual-polarized horn 12; taking a transmission array transceiver unit as an example, when the dual-polarized horn 12 radiates horizontally polarized electromagnetic waves, the electromagnetic waves are received by the first rectangular patch 61 and then energy is transferred to the transmitter unit, namely the second rectangular patch 66, through the third metal through hole 62, the fourth metal through hole 68 and the first phase shifting line 63, and then radiated to the atmosphere, so that the function of horizontal polarization of millimeter wave frequency bands is completed; when the dual-polarized horn 12 radiates vertically polarized electromagnetic waves, the electromagnetic waves are transmitted to the transmitting unit, namely the second rectangular patch 66, by the first rectangular patch 61 through the fifth metal through hole 65, the sixth metal through hole 67 and the second phase shift line 64, and then the electromagnetic energy is radiated to the atmosphere, so that the function of vertical polarization of the millimeter wave frequency band is completed; meanwhile, the phase modulation of each transmission array unit in the transmission array surface 13 is realized by changing the phase shift length of the transmission array unit, and the phase shift of each transmission array unit follows the Fermat principle, so that the transmission array surface 13 can convert incident spherical waves into emergent plane waves, and the function of realizing millimeter wave frequency band electromagnetic radiation by beam focusing is completed.
In the aspect of antenna performance, when the antenna works in a microwave frequency band, as shown in fig. 7, the reflection coefficient of two ports of the antenna in the range of 1.85-2.92 GHz is smaller than-10 dB, the bandwidth is 44.9%, which indicates that the antenna has good impedance matching in the microwave frequency band, the isolation between two low-frequency ports is smaller than-15 dB in the working frequency band, and indicates that the isolation condition of the two low-frequency ports is good; FIG. 8 shows gain characteristics of horizontal polarization and vertical polarization of an antenna in a microwave band, wherein the gain of the antenna is located in the range of 7.6-8.1 dBi within the bandwidth of-10 dB, which indicates that the antenna has good gain characteristics in the microwave band; the E-plane and H-plane directional diagrams of the horizontal polarization and the vertical polarization of the microwave band are shown in fig. 9 and 10, respectively, and the directional diagrams are basically consistent with those of the conventional dipole antenna, which indicates that the antenna can be equivalently used as a dual-polarized dipole to work normally in the microwave band.
When the antenna works in the millimeter wave frequency band, as shown in fig. 11, the reflection coefficients of the two ports of the antenna in the range of 54-68 GHz are smaller than-10 dB, which indicates that the antenna can realize good impedance matching in the frequency band, and the isolation between the two high-frequency ports is smaller than-25 dB in the working frequency band, which indicates that the isolation condition of the two high-frequency ports is good; the gain characteristics of the millimeter wave frequency band of the antenna are shown in fig. 12, the highest gain can reach 25.6dBi, the 3dB gain bandwidth is 16%, which shows that the antenna has good gain characteristics in the millimeter wave frequency band and stable gain in the working frequency band; fig. 13 and 14 are E-plane and H-plane directional diagrams of horizontal polarization and vertical polarization, respectively, and it can be seen that the antenna directional diagram side lobes are below-15 dB and both have lower back lobes. The isolation curve of the high-frequency port and the low-frequency port of the common-caliber antenna is shown in figure 15, the curve of the microwave frequency band is smaller than-50 dB, the curve of the millimeter wave frequency band is smaller than-20 dB, and the fact that the isolation condition of the high-frequency port and the low-frequency port is good is indicated that the antennas of the two frequency bands work independently.
The dual-polarized antenna provided by the embodiment of the invention has the advantages that the bandwidth of a microwave frequency band is 44.9%, the gain is 7.85+/-0.25 dBi, the 3dB gain bandwidth of a millimeter wave frequency band is 16%, the peak gain can reach 25.6dBi, and the dual-polarized antenna is superior to the current technical level.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The microwave/millimeter wave dual-frequency dual-polarized antenna with the multiplexing of the dipole/transmission array is characterized by comprising a metal floor (11), a dual-polarized horn (12), a transmission array surface (13) and two coaxial ports (14),
the transmissive array plane (13) is located above the metal floor (11), the transmissive array plane (13) comprises a first dielectric plate (31), a second dielectric plate (32), a third dielectric plate (33), a fourth dielectric plate (34) and a fifth dielectric plate (35), metal layers are arranged on the lower surface of the first dielectric plate (31), between adjacent dielectric plates and on the upper surface of the fifth dielectric plate (35), the metal layers are respectively defined as a first metal layer (41), a second metal layer (42), a third metal layer (43), a fourth metal layer (44), a fifth metal layer (45) and a sixth metal layer (46), the second metal layer (42) and the fifth metal layer (45) are divided into four parts through gaps, the equivalent is four arms of a dipole antenna, the four arms comprise horizontally polarized dipoles and vertically polarized dipoles, a first rectangular patch (61) is etched on the first metal layer (41), a first rectangular patch (63) is etched on the third metal layer (43), a rectangular patch (64) is etched on the fourth metal layer (63), a rectangular patch (64) is etched on the fourth metal layer (64), and a rectangular patch (64) is etched on the fourth metal layer (64) is etched on the third metal layer (64) through the rectangular patch (64) through gaps The fourth metal through hole (68) and the first phase shifting line (63) are connected with the second rectangular patch (66) to realize the function of horizontal polarization of the transmissive array unit, and the first rectangular patch (61) is connected with the second rectangular patch (66) through the fifth metal through hole (65), the sixth metal through hole (67) and the second phase shifting line (64) to realize the function of vertical polarization of the transmissive array unit;
the dual-polarized horn (12) is positioned below the metal floor (11), and the dual-polarized horn (12) is used for feeding the transmission array surface (13);
two coaxial ports (14) are arranged on the transmission array surface (13), and the two coaxial ports (14) are respectively used for feeding in horizontal and vertical polarization modes of the dipole antenna.
2. The microwave/millimeter wave dual-frequency dual-polarized antenna for dipole/transmission array multiplexing according to claim 1, wherein said metal floor (11) is provided with a slit with the same caliber as said dual-polarized horn (12) for transmitting electromagnetic waves.
3. The microwave/millimeter wave dual-frequency dual-polarized antenna of claim 1, wherein the second metal layer (42) and the fifth metal layer (45) are each etched with a first slit (25) and a second slit (26) along ±45° directions, respectively, and the second metal layer (42) and the fifth metal layer (45) are divided into four diamond-shaped portions by the first slit (25) and the second slit (26), respectively.
4. A microwave/millimeter wave dual-frequency dual-polarized antenna for dipole/transmissive array multiplexing according to claim 1, characterized in that two coaxial ports (14) are arranged in the center of the transmissive array plane (13).
5. A dipole/transmission matrix multiplexed microwave/millimeter wave dual-frequency dual-polarized antenna according to claim 1, characterized in that the two coaxial ports (14) comprise a first coaxial connector (51), a second coaxial connector (52), the first coaxial connector (52) being for feeding both horizontally polarized dipoles and the second coaxial connector (52) being for feeding both vertically polarized dipoles.
6. A dipole/transmissive matrix multiplexed microwave/millimeter wave dual-frequency dual-polarized antenna according to claim 1, characterized in that the transmissive array plane (13) is fed by a dual-polarized horn (12) in the millimeter wave band, electromagnetic energy being fed spatially to the transmissive array plane (13) via the dual-polarized horn (12).
7. A microwave/millimeter wave dual-frequency dual-polarized antenna of dipole/transmission array multiplexing according to claim 1, characterized in that the transmission array face (13) comprises a plurality of transmission array elements, and the transmission array elements are arranged in a linear form.
8. A dipole/transmission matrix multiplexed microwave/millimeter wave dual-frequency dual-polarized antenna according to any of claims 1-7, characterized in that the transmission matrix surface (13) comprises a plurality of transmission matrix elements, the transmission matrix elements on the transmission matrix surface (13) differing only in the phase shift line length, the phase shift line length being determined by the amount of phase shift required for each transmission matrix element.
9. A dipole/transmission matrix multiplexed microwave/millimeter wave dual-frequency dual-polarized antenna according to claim 8, wherein the amount of phase shift required for each transmission matrix element follows the fermat principle, i.e.
Wherein,i.e. the amount of phase shift required at the point (x, y), x and y representing the coordinates of a point on the transmissive array face (13) in the x-direction and y-direction, f being the focal length of the transmissive array (13), λ representing the free space wavelength at the center frequency of the millimeter wave band,may be any initial phase.
10. A dipole/transmission matrix multiplexed microwave/millimeter wave dual-frequency dual-polarized antenna according to claim 8, characterized in that the phase modulation of each transmission matrix element in the transmission matrix face (13) is achieved by varying the length of the phasing line in the transmission matrix element.
CN202311419923.6A 2023-10-30 2023-10-30 Microwave/millimeter wave dual-frequency dual-polarized antenna with dipole/transmission array multiplexing Pending CN117673724A (en)

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