Microwave millimeter wave co-aperture filtering antenna based on groove structure multiplexing

Abstract

The application belongs to the technical field of wireless communication, and particularly relates to a microwave millimeter wave common-aperture filtering antenna based on slot structure multiplexing. The microwave millimeter wave common-aperture filtering antenna based on slot structure multiplexing of the application forms a millimeter wave filtering cavity antenna array through a first substrate, and forms a microwave filtering antenna array through the first substrate and an antenna radiation patch. The millimeter wave cavity antenna array is embedded in the microwave antenna array, so that the edge-shooting microwave / millimeter wave common-aperture filtering antenna is realized. The antenna as a whole can be processed through a PCB process, and has high integration. In the microwave frequency band, the metalized slot structure of the millimeter wave frequency band is multiplexed as the ground structure of the microwave frequency band patch, so that the resonance points and the radiation zeros of the lower frequency band are introduced; by loading parasitic patches on both sides of the driven patch, the coupling strength between the patches is adjusted, so that the resonance points and the radiation zeros of the higher frequency band are obtained. Due to the multiple resonance points, the microwave antenna has a wide bandwidth.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wireless communication, and particularly relates to a microwave millimeter wave co-caliber filtering antenna based on groove structure multiplexing. BACKGROUND

[0002] After sufficient development, millimeter wave communication is widely regarded as the first choice for current 5G and upcoming 6G wireless communication systems due to its high-speed data transmission and abundant spectrum resources, as well as a mature and complete industrial chain. Considering the wide coverage of existing microwave communication technology, it is expected that the millimeter wave frequency band will continue to coexist with the microwave frequency band for a long time. In this case, it is urgently needed to develop an antenna that can simultaneously support microwave and millimeter wave frequency bands.

[0003] Currently, there are mainly four ways to realize co-caliber of antennas, the first way is to place two antennas of different frequencies adjacent to each other to realize co-caliber, this co-caliber antenna implementation form has low space utilization efficiency; the second way is to stack high microwave antennas, the profile of this antenna is high, and there is often an air layer in the middle of the antenna structure, which leads to the inability to realize a high integration; the third way is a microwave / millimeter wave co-caliber antenna based on mode composite structure, this kind of antenna is more suitable for end-fire antenna design, such as used for side-fire antenna design, there is often a problem of narrow bandwidth of high microwave antenna; the fourth way is an embedded structure, this structure has great application potential due to its excellent high microwave independent design capability.

[0004] Although a large number of current researches greatly promote the development of microwave millimeter wave co-caliber antennas, there is almost no application of filtering. As a key component of wireless communication systems, filters are usually located between antennas and radio frequency integrated circuits to suppress out-of-band spurs, local oscillator leakage and image frequency interference, thereby providing excellent radiation performance. Filtered antennas combine antennas and filters to achieve lower insertion loss and miniaturization of system volume, and improve the efficiency of wireless systems. Therefore, the research on microwave millimeter wave co-caliber filtering antennas is of very important practical significance. On this basis, co-caliber antennas still need to realize multiple functions to cope with different application scenarios, such as compact size of microwave antennas, high channel isolation of microwave and millimeter wave, wide bandwidth, beam scanning and high gain of millimeter wave antennas. SUMMARY

[0005] The application aims at the deficiencies in the prior art and provides a microwave millimeter wave co-aperture filtering antenna based on slot structure multiplexing.

[0006] To achieve the above-mentioned application purposes, the technical solutions are as follows:

[0007] The microwave millimeter wave co-aperture filtering antenna based on slot structure multiplexing comprises antenna radiation patches, a first substrate and a second substrate which are stacked from top to bottom; the antenna radiation patches comprise a driving patch, a first parasitic patch and a second parasitic patch, the first parasitic patch and the second parasitic patch are symmetrically arranged about the center line of the driving patch; the first substrate is provided with a first metalized through hole and a millimeter wave antenna unit; the millimeter wave antenna unit comprises a metalized slot structure, a non-metalized slot and a circular metal patch; the metalized slot structure comprises a first metalized slot and a second metalized slot, the driving patch is provided with four first metal slot accommodating holes, the first parasitic patch and the second parasitic patch are respectively provided with semicircular second metal slot accommodating holes, the first metalized slot is located in the first metal slot accommodating hole, and the second metalized slot is located in the second metal slot accommodating hole; the first metalized slot is connected with the driving patch, the metalized slot structure is arranged on the first substrate in a 1*6 array and is in contact with a metal ground, and the metal ground is arranged on the second substrate; the second substrate is provided with a 1*6 array of I-shaped slots, a second metalized through hole and a second metalized through hole accommodating hole; the metal through hole accommodating hole and the second metalized through hole are coaxially arranged; a plurality of millimeter wave antenna feed metal strips and a microwave antenna feed metal strip are arranged below the second substrate; the plurality of millimeter wave antenna feed metal strips are arranged in parallel; a metal probe arranged at the end of the microwave antenna feed metal strip is connected with the driving patch through the second metalized through hole, the metalized through hole accommodating hole and the first metalized through hole in sequence.

[0008] Further, as a preferred technical solution of the application, the diameter of the first metalized slot is greater than the diameter of the second metalized through hole.

[0009] Further, as a preferred technical solution of the application, the number of the I-shaped slots is the same as that of the metalized slot structure and the positions correspond.

[0010] Further, as a preferred technical solution of the application, the plurality of millimeter wave antenna feed metal strips are located directly below the I-shaped slots.

[0011] Further, as a preferred technical solution of the present application, the metalized slot structure comprises two arc-shaped sub-slots, the non-metalized slot comprises four arc-shaped sub-slots, the non-metalized slot is located in a circular area surrounded by the metalized slot structure, and a circular metal patch is located in a circular area surrounded by the non-metalized slot; the metalized slot structure, the non-metalized slot and the circular metal patch are coaxially arranged.

[0012] Further, as a preferred technical solution of the present application, the dielectric constant of the first substrate is 3.0, and the loss angle is 0.0014; the dielectric constant of the second substrate is 3.55, and the loss angle is 0.0027.

[0013] Further, as a preferred technical solution of the present application, two parallel long transverse open-circuit branches and short transverse open-circuit branches are arranged on the millimeter wave antenna feed metal strip, the long transverse open-circuit branches are used to generate a resonance mode and a radiation zero point at a lower millimeter wave frequency, and the short transverse open-circuit branches are used to adjust antenna impedance matching.

[0014] The microwave millimeter wave common-aperture filtering antenna based on slot structure multiplexing has the following technical effects compared with the prior art by adopting the above technical solution:

[0015] (1) The microwave millimeter wave common-aperture filtering antenna based on slot structure multiplexing of the present application forms a millimeter wave band filtering cavity antenna array by the first substrate, and forms a microwave filtering antenna array by the first substrate and the antenna radiation patch, embeds the millimeter wave cavity antenna array into the microwave antenna array, realizes an edge-shooting microwave / millimeter wave common-aperture filtering antenna, and the antenna as a whole can be processed by a PCB process, so that the integration degree is high.

[0016] (2) The microwave millimeter wave common-aperture filtering antenna based on slot structure multiplexing of the present application multiplexes the metalized slot structure of the millimeter wave band as the ground structure of the microwave band patch, so as to introduce a lower frequency band resonance point and a radiation zero point; by loading parasitic patches on both sides of the driven patch, the coupling strength between the patches is adjusted to obtain a higher frequency band resonance point and a radiation zero point. Due to multiple resonance points, the microwave antenna has a wider bandwidth.

[0017] (3) The microwave millimeter wave common-aperture filtering antenna based on slot structure multiplexing of the present application adopts a substrate integrated cavity antenna array scheme in the millimeter wave band, has the advantages of high efficiency and high gain, and can realize beam scanning by independently feeding each cavity antenna unit.

[0018] (4) The microwave and millimeter wave co-aperture filtering antenna based on groove structure multiplexing of the application introduces a transverse open stub on the millimeter wave frequency band feeder, thereby introducing an additional resonance point and a radiation zero point at a lower frequency in the millimeter wave band. Due to multiple resonance points, the millimeter wave antenna also has a relatively wide bandwidth.

[0019] (5) The microwave and millimeter wave co-aperture filtering antenna based on groove structure multiplexing of the application can simultaneously form an array to realize high gain and beam scanning functions of dual frequency while maintaining filtering effect. In addition, the antenna has the excellent characteristic of low profile. Therefore, the dual-frequency filtering antenna of the application can meet the needs of different scenes and is extremely practical. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Fig. 1 shows an exploded view of a microwave and millimeter wave co-aperture filtering antenna based on groove structure multiplexing according to an embodiment of the application;

[0021] Figure 2 Fig. 2 shows a top view of a microwave and millimeter wave co-aperture filtering antenna based on groove structure multiplexing according to an embodiment of the application;

[0022] Figure 3 Fig. 3 shows a position relationship diagram of a metalized groove, a non-metalized groove and a circular metal patch according to an embodiment of the application;

[0023] Figure 4 Fig. 4 shows a structural schematic diagram of a millimeter wave antenna feed metal strip according to an embodiment of the application;

[0024] Figure 5 Fig. 5 shows a microwave and millimeter wave co-aperture filtering antenna based on groove structure multiplexing according to an embodiment of the application;

[0025] Figure 6 Fig. 6 shows simulation results of a reflection coefficient and gain of a microwave and millimeter wave co-aperture filtering antenna based on groove structure multiplexing according to an embodiment of the application in a 3.5 GHz frequency band antenna;

[0026] Figure 7 Fig. 7 shows simulation results of a reflection coefficient and gain of a microwave and millimeter wave co-aperture filtering antenna based on groove structure multiplexing according to an embodiment of the application in a 28 GHz frequency band 1x8 antenna array;

[0027] Figure 8 Fig. 8 shows an isolation simulation diagram of a microwave and millimeter wave co-aperture filtering antenna based on groove structure multiplexing according to an embodiment of the application in a millimeter wave frequency band and a microwave frequency band;

[0028] Figure 9Simulation patterns of the microwave millimeter wave co-axial filtering antenna based on groove structure multiplexing at (a) 3.5 GHz and (b) 28 GHz antenna beam scanning according to an embodiment of the present application;

[0029] Figure 10 Simulation patterns of the microwave millimeter wave co-axial filtering antenna based on groove structure multiplexing at 3.5 GHz antenna according to an embodiment of the present application;

[0030] Figure 11 Simulation patterns of the microwave millimeter wave co-axial filtering antenna based on groove structure multiplexing at 28 GHz antenna according to an embodiment of the present application;

[0031] Reference numerals in the drawings:

[0032] 1-antenna radiation patch, 11-driven patch, 12-first parasitic patch, 13-second parasitic patch, 14-second driven patch, 15-third parasitic patch, 141-first metal groove accommodating hole, 142-second metal groove accommodating hole, 2-first substrate, 21-first metalized via, 3-millimeter wave antenna unit, 31-metalized groove structure, 311-first metalized groove, 312-second metalized groove, 32-non-metalized groove, 33-circular metal patch, 4-I-type slot, 51-metalized via accommodating hole, 6-second substrate, 61-second metalized via, 7-millimeter wave antenna feed metal strip, 71-long transverse open circuit branch, 72-short transverse open circuit branch, 8-microwave antenna feed metal strip, 9-metal probe. DETAILED DESCRIPTION

[0033] The present application will be described in further detail below with reference to the drawings so that those skilled in the art can more thoroughly understand the present application and can implement it. The following examples are provided by way of explanation only and are not intended to limit the present application.

[0034] As Figures 1-2As shown, a microwave millimeter wave co-caliber filtering antenna based on groove structure multiplexing includes an antenna radiation patch 1, a first substrate 2 and a second substrate 6 arranged from top to bottom; the antenna radiation patch 1 includes a driven patch 11, a first parasitic patch 12 and a second parasitic patch 13, the first parasitic patch 12 and the second parasitic patch 13 are symmetrically arranged about the center line of the driven patch 11; the first substrate 2 is provided with a first metalized through hole 21 and a millimeter wave antenna unit 3; the millimeter wave antenna unit 3 includes a metalized groove structure 31, a non-metalized groove 32 and a circular metal patch 33; the metalized groove structure 31 includes a first metalized groove 311 and a second metalized groove 312, the driven patch 11 is provided with four first metal groove accommodating holes 141, the first parasitic patch 12 and the second parasitic patch 13 are respectively provided with semicircular second metal groove accommodating holes 142, the first metalized groove 311 is located in the first metal groove accommodating hole 141, and the second metalized groove 312 is located in the second metal groove accommodating hole 142; the second metalized groove 312 is not connected with the antenna radiation patch (1), the first metalized groove 311 is connected with the driven patch 11, the metalized groove structure 31 is arranged on the first substrate 2 in a 1x6 array and is in contact with a metal ground 5, and the metal ground 5 is arranged on the second substrate 6; the second substrate 6 is provided with a 1x6 array of I-shaped slots 4, a metalized through hole accommodating hole 51 and a second metalized through hole 61; the metal through hole accommodating hole 51 and the second metalized through hole 61 are coaxially arranged; the second substrate 6 is provided with a plurality of millimeter wave antenna feed metal strips 7 and a microwave antenna feed metal strip 8; the plurality of millimeter wave antenna feed metal strips 7 are arranged in parallel; a metal probe 9 arranged at the end of the microwave antenna feed metal strip 8 is connected with the driven patch 11 through the second metalized through hole 61, the metalized through hole accommodating hole 51 and the first metalized through hole 21 in sequence.

[0035] The antenna radiation patch 1 comprises a driving patch 11 in the middle position and first parasitic patch 12 and second parasitic patch 13 on both sides, which are arranged on the first substrate 2; and the metalized slot structure 31, non-metalized slot 32 and circular metal patch 33 are arranged on the first substrate 2. The first metalized slot 311 has a total of four, which are connected with the driving patch 11 to make the driving patch 11 grounded, and the second metalized slot 312 has a total of two, which are located on both sides of the four first metalized slots 311 and do not contact the first parasitic patch 12 and the second parasitic patch 13. The metalized slot structure 31 is used to realize the mutual isolation between the millimeter wave antenna and the microwave antenna. The driving patch 11 is provided with four circular first metal slot accommodating holes 141, and the first parasitic patch 12 and the second parasitic patch 13 are respectively provided with a semicircular second metal slot accommodating hole 142. The first metal slot accommodating hole 141 and the first metalized slot 311 have the same center axis and the same diameter, so that the driving patch 11 is connected with the metal ground 5. The second metal slot accommodating hole 142 and the second metalized slot 312 have the same center axis, and the diameter of the second metal slot accommodating hole 142 is slightly larger than the diameter of the second metalized slot 312, so as to avoid the first parasitic patch 12 and the second parasitic patch 13 from contacting the metalized slot structure 31.

[0036] The metal ground 5 is provided with I-shaped slots 4 arranged in a 1x6 array, which are used for millimeter wave feeding. The metal ground 5 and the second metalized through hole 61 are arranged on the second substrate 6, and the second metalized through hole 61 and the first metalized through hole 21 have the same diameter and the same center axis. The metal through hole accommodating hole 51 is arranged on the metal ground to avoid the metal ground 5 from contacting the second metalized through hole 61, and the I-shaped slots 4 on the metal ground 5, the metalized slot structure 31, the non-metalized slot 32 and the circular metal patch 33 have the same number and corresponding positions.

[0037] Each millimeter wave antenna feeding metal strip 7 is located directly below an I-shaped slot 4. The millimeter wave antenna feeding metal strip 7 is parallel to the microwave antenna feeding metal strip 8, and the metal probe 9 is arranged at the end of the microwave antenna feeding metal strip 8, has the same center axis and diameter as the first metalized through hole 21 and the second metalized through hole 61, and connects the microwave antenna feeding metal strip 8 with the driving patch 11. The microwave antenna feeding metal strip 8 and the metal probe 9 do not contact the metal ground 5. The microwave antenna feeding metal strip 8 provides port #1, and the millimeter wave antenna feeding metal strip 7 provides ports #2, #3, #4, #5, #6 and #7 respectively.

[0038] As Figure 3As shown, the metallized groove structure 31 includes two arc-shaped sub-grooves, and the non-metallized groove 32 includes four arc-shaped sub-grooves. The non-metallized groove 32 is located within the circular area enclosed by the metallized groove structure 31, and the circular metal patch 33 is located within the circular area enclosed by the non-metallized groove 32. The metallized groove structure 31, the non-metallized groove 32, and the circular metal patch 33 are placed coaxially.

[0039] like Figure 4 As shown, the millimeter-wave antenna feed metal strip 7 has two parallel long transverse open-circuit stubs 71 and short transverse open-circuit stubs 72. The long transverse open-circuit stub 71 is used to generate a resonant mode and radiation null at a lower frequency of millimeter waves, and the short transverse open-circuit stub 72 is used to adjust the antenna impedance matching.

[0040] like Figure 5 As shown in the embodiment, the microwave and millimeter-wave common-aperture filter antenna based on slot structure multiplexing can be expanded into a dual-band antenna array. The antenna array consists of two antenna subarrays. The second parasitic patch 13, located between the driving patch 11 and the second driving patch 14, is shared by the two microwave antenna subarrays, reducing the overall size of the array. The other side of the second driving patch 14 is the third parasitic patch 15. The millimeter-wave antenna element 3 is expanded into a 1×12 array, with 12 millimeter-wave antenna feed metal strips 7 providing ports #2-#14 respectively. Similarly, the I-shaped slot 4, the metallized slot structure 31, the non-metallized slot 32, and the circular metal patch 33 are the same number and corresponding in position as the millimeter-wave antenna feed metal strips 7.

[0041] The first substrate has a dielectric constant of 3.0 and a loss angle of 0.0014, while the second substrate has a dielectric constant of 3.55 and a loss angle of 0.0027.

[0042] In use, firstly, in the microwave frequency band, the first substrate 2 constitutes a dielectric substrate of a microwave antenna, the antenna radiation patch 1 serves as an antenna radiation patch, and a radio frequency excitation signal is fed by the bottom microwave antenna feed metal strip 8 and is excited to the antenna driving patch 11 through the metal probe 9. Since the electromagnetic wave is reversed when contacting the four first metalized grooves 311, an additional resonance mode is introduced, and the driving patch 11, the first metalized groove 311, the metal ground 5, and the metal probe 9 together form an equivalent first-order high-pass filter, which produces a radiation zero point at a lower frequency. At the same time, the energy on the driving patch 11 is coupled to the first parasitic patch 12 and the second parasitic patch 13, and at a specific frequency, the currents on the three patches can be in phase and superimposed to produce an additional resonance mode; similarly, at a specific frequency, the currents on the driving patch 11, the first parasitic patch 12, and the second parasitic patch 13 are in anti-phase and cancel each other out, introducing a resonance zero point at a higher frequency. Due to the generation of the additional resonance mode and the introduction of the two radiation zero points, the broadband effect and the band-pass filtering effect in the 3.5 GHz microwave frequency band are achieved. At the same time, in the array expansion embodiment, the expanded 1x2 patch antenna array realizes microwave beam scanning.

[0043] In the millimeter wave frequency band, the first substrate 2, the first metalized groove 311, the second metalized groove 312, the non-metalized groove 32, the circular metal patch 33, and the metal ground 5 together constitute a cavity antenna array, a radio frequency signal is fed by the bottom millimeter wave antenna feed metal strip 7 and is coupled to the cavity antenna located thereon through the I-shaped slot 4 to realize the operation in the 28 GHz millimeter wave frequency band. The millimeter wave antenna feed metal strip 7 is provided with two parallel transverse open-circuit branches, wherein the long transverse open-circuit branch 71 is used to produce a resonance mode and a radiation zero point at a lower millimeter wave frequency, and the short transverse open-circuit branch 72 is used to adjust the antenna impedance matching. At the same time, in the array expansion embodiment, the expanded 1x12 cavity antenna array realizes millimeter wave beam scanning.

[0044] The application embeds a millimeter wave filtering cavity antenna array in a microwave filtering patch antenna in the same plane, realizes a 3.5 / 28GHz microwave / millimeter wave filtering antenna in the same plane and with the same aperture, and the design of the filtering antenna greatly improves the efficiency of the antenna system. In the microwave frequency band, the first metalized slot 311 is a key part for realizing the filtering function of the patch antenna. In the millimeter wave frequency band, the first metalized slot 311 can be reused to isolate the cavity antenna and the microwave patch antenna. The microwave and millimeter wave antennas of the application can be extended simultaneously, and since each antenna unit can be independently fed, a controllable beam scanning function can be realized. The filtering characteristics of the dual-frequency, the first metalized slot 311 and the second metalized slot 312 enable the microwave antenna and the millimeter wave antenna to have good isolation. The multi-resonant mode of the microwave antenna and the millimeter wave antenna enables them to have a wide operating bandwidth, wherein the microwave antenna can cover the 5G China Telecom frequency band (3.4-3.5GHz), the China Unicom frequency band (3.5-3.6GHz) and the 3.3GHz frequency band commonly used by China Telecom, Unicom and the Radio and Television (3.3-3.4GHz), and the millimeter wave antenna can cover the China 5G millimeter wave experimental frequency band n78 frequency band (26.5-29.5GHz).

[0045] The case is an extended dual-band array as shown in Figure 5 The dielectric constant of the first substrate 2 is 3.0, the loss angle is 0.0014, the thickness is 3.5mm, the dielectric constant of the second substrate is 3.55, the loss angle is 0.0027, and the thickness is 0.305mm. The overall cross-sectional height is 3.805mm (~0.04λ0@3.5GHz), and the planar size is 53mm x 36mm (~0.63 x 0.42λ02@3.5GHz).

[0046] The transmission response and radiation response of the antenna are as shown in Figures 6-7 For S11≤-10dB, the bandwidth range is 3.24-3.72GHz and 25.8-30.1GHz, which can be seen to cover the China Telecom frequency band (3.4-3.5GHz) and the China Unicom frequency band (3.5-3.6GHz) in 5G and the China 5G millimeter wave experimental frequency band (26.5-29.5GHz), the in-band gain is above 6.7dBi and 13.8dBi (1x8 array) respectively, the radiation zero point is obvious, and the edge selectivity is good. As shown in Figure 8 The microwave and millimeter wave isolation is high, and is above 58dB and 43dB respectively. As shown in Figure 9 The beam scanning performance can meet the range of ±25° and ±30° respectively. As shown in Figure 10 and Figure 11 The antenna pattern is symmetrical, and the cross-polarization is better than 18dB.

[0047] The application is based on the co-aperture design of structural multiplexing, and a slot structure for generating a lower sideband radiation zero point in a microwave band is evolved into a metalized slot, which is combined with a metal ground to form a radiation cavity of a millimeter wave antenna. An upper sideband zero point is generated by loading a parasitic radiation patch, and a microwave patch antenna realizes a filtering response. A radiation zero point is generated by loading a transverse open stub on a millimeter wave feed line, and a millimeter wave cavity antenna realizes a filtering function. A microwave / millimeter wave co-planar co-aperture filtering antenna is realized, and the antenna as a whole can be processed by a PCB process to realize high integration.

[0048] The above-described specific embodiments further illustrate the purposes, technical solutions and beneficial effects of the application, and it should be understood that the above-described specific embodiments are merely specific embodiments of the application and are not intended to limit the scope of the application. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the application shall fall within the scope of the application.

Claims

1. A microwave millimeter wave co-axial filter antenna based on groove structure multiplexing, comprising an antenna radiation patch (1), a first substrate (2) and a second substrate (6) stacked from top to bottom; characterized in that, The antenna radiation patch (1) comprises a driven patch (11), a first parasitic patch (12) and a second parasitic patch (13), the first parasitic patch (12) and the second parasitic patch (13) are symmetrically arranged about the center line of the driven patch (11); the first substrate (2) is provided with a first metallized via hole (21) and a millimeter wave antenna unit (3); the millimeter wave antenna unit (3) comprises a metallized slot structure (31), a non-metallized slot (32) and a circular metal patch (33); the metallized slot structure (31) comprises a first metallized slot (311) and a second metallized slot (312), the driven patch (11) is provided with four first metal slot accommodating holes (141), the first parasitic patch (12) and the second parasitic patch (13) are respectively provided with semicircular second metal slot accommodating holes (142), the first metallized slot (311) is located in the first metal slot accommodating hole (141), and the second metallized slot (312) is located in the second metal slot accommodating hole (142); the first metallized slot (311) is connected with the driven patch (11), the metallized slot structure (31) is arranged on the first substrate (2) in a 1*6 array and is in contact with a metal ground (5), and the metal ground (5) is arranged on a second substrate (6); the second substrate (6) is provided with a 1*6 array of I-shaped slots (4), a metallized via hole accommodating hole (51) and a second metallized via hole (61); the metallized via hole accommodating hole (51) and the second metallized via hole (61) are coaxially arranged; a plurality of millimeter wave antenna feed metal strip bars (7) and microwave antenna feed metal strip bars (8) are arranged below the second substrate (6); the plurality of millimeter wave antenna feed metal strip bars (7) are all arranged in parallel; a metal probe (9) arranged at the end of the microwave antenna feed metal strip bar (8) is connected with the driven patch (11) through the second metallized via hole (61), the metallized via hole accommodating hole (51) and the first metallized via hole (21) in sequence; The metallized slot structure (31) comprises two arc-shaped sub-slots, the non-metallized slot (32) comprises four arc-shaped sub-slots, the non-metallized slot (32) is located in a circular region surrounded by the metallized slot structure (31), and the circular metal patch (33) is located in a circular region surrounded by the non-metallized slot (32); the metallized slot structure (31), the non-metallized slot (32) and the circular metal patch (33) are coaxially arranged; The metal ground (5) is provided with I-shaped slots (4) arranged in a 1*6 array, and the I-shaped slots (4) are used for millimeter wave feeding; the metal ground (5) and the second metallized via hole (61) are arranged on the second substrate (6); The I-shaped slots (4), the metallized slot structure (31), the non-metallized slot (32), the circular metal patch (33) and the millimeter wave antenna feed metal strip bars (7) are the same in number and correspond in position.

2. The microwave / millimeter wave co-prime filter antenna based on slot structure reuse according to claim 1, characterized in that, The diameter of the first metallized slot (311) is greater than the diameter of the second metallized via hole (61).

3. The microwave / millimeter wave co-prime filter antenna based on slot structure reuse according to claim 1, characterized in that, The I-shaped slots (4) are the same in number as the metallized groove structures (31) and correspond in position.

4. The microwave / millimeter wave co-prime filter-antenna based on slot-structure multiplexing according to claim 3, characterized in that, The plurality of millimeter wave antenna feed metal strips (7) are located directly below the I-shaped slots (4).

5. The microwave / millimeter wave co-prismal microstrip filter-antenna based on slot structure multiplexing according to claim 1, characterized in that, The dielectric constant of the first substrate (2) is 3.0, and the loss angle is 0.0014; the dielectric constant of the second substrate (6) is 3.55, and the loss angle is 0.0027.

6. The microwave / millimeter wave co-prime filter-antenna based on slot-structure multiplexing according to claim 4, characterized in that, Two parallel long transverse open-circuit stubs (71) and short transverse open-circuit stubs (72) are arranged on the millimeter wave antenna feed metal strip (7), the long transverse open-circuit stub (71) is used to generate a resonance mode and a radiation zero point at a lower frequency of millimeter waves, and the short transverse open-circuit stub (72) is used to adjust the antenna impedance matching.

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