Microwave and millimeter wave common-aperture antenna, method and equipment based on slot structure multiplexing

Abstract

The invention discloses a microwave and millimeter wave common-aperture antenna, method and device based on slot structure multiplexing, and the antenna comprises a metal floor which is disposed on a first plane, and is provided with a dual-function slot in an etching manner; the dual-function slot serves as a radiation structure of a microwave second frequency band and is multiplexed as a coupling feed structure of the millimeter wave array; a plurality of millimeter wave patch units, wherein the positions of the millimeter wave patch units are matched with the positions of the difunctional gaps; the millimeter wave same-frequency decoupling structure is arranged on the second plane and comprises a plurality of microstrip lines which are arranged in parallel; the microstrip lines are located on the two sides of the millimeter wave patch unit and stretch across the dual-function gap. The dual-function gap is equivalently and electrically divided into a plurality of independent feed gaps by the microstrip line in a millimeter wave frequency band, so that the isolation degree between millimeter wave patch units is improved. The antenna has the advantages of being simple in structure, low in profile, small in size and high in isolation, can be integrated on wearable glasses equipment, and covers microwave and millimeter wave frequency bands at the same time.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to a microwave and millimeter-wave common aperture antenna, method and device based on slot structure multiplexing. Background Art

[0002] With the development of wireless communication technologies, the microwave band and the millimeter-wave band will coexist. Microwave communication has the advantages of low transmission loss and long transmission distance, while millimeter-wave communication has the advantages of wide spectral range, high data rate and low latency. Therefore, current wireless communication needs to cover both the microwave and millimeter-wave bands simultaneously. Wearable device communication is a very important field in wireless communication and is widely used in fields such as medical health and entertainment. People have an urgent need for wearable device communication. Therefore, wearable antennas in wearable devices need to be compatible with both the microwave and millimeter-wave bands simultaneously.

[0003] The size of wearable devices is very narrow, and it is a great challenge to achieve the coexistence of microwave and millimeter-wave antennas in wearable devices. In the compact space of wearable devices, it will lead to the deterioration of the isolation and radiation of microwave antennas and millimeter-wave antennas. In addition, in order to improve the millimeter-wave communication range, millimeter-wave antennas need to have the ability of beam scanning. However, the smart glasses antennas proposed currently can only cover the microwave band. For example, the smart glasses proposed in CN110635223A can only cover the 4G band range of microwave. Common aperture antennas can cover both the microwave and millimeter-wave bands simultaneously and achieve a relatively compact size. However, the size of current common aperture antennas is still large and not suitable for application in smart glasses devices. For example, the microwave and millimeter-wave antenna proposed in CN116742349A has a large size and cannot be conformal designed with smart glasses devices. Summary of the Invention

[0004] To solve at least one of the technical problems existing in the prior art to a certain extent, the purpose of the present invention is to provide a microwave and millimeter-wave common aperture antenna, method and device based on slot structure multiplexing, which has the advantages of simple structure, low profile, miniaturization, high isolation, and simultaneously covering microwave and millimeter-wave band communications, and can be integrated into wearable devices such as wearable glasses.

[0005] The first technical solution adopted by the present invention is:

[0006] A microwave and millimeter-wave common aperture antenna based on slot structure multiplexing, comprising:

[0007] A metal floor is arranged on a first plane, and a dual-functional slot is etched on the metal floor; the dual-functional slot serves as both a radiation structure for a second microwave band and a coupled feeding structure for a millimeter-wave array by multiplexing.

[0008] A plurality of millimeter-wave patch units, the positions of the millimeter-wave patch units being matched with the dual-functional slot; the millimeter-wave patch units sharing a metal ground plane with the microwave antenna;

[0009] A millimeter-wave co-frequency decoupling structure, disposed on a second plane, comprising a plurality of microstrip lines arranged in parallel; the dual-functional slot is equivalently electrically divided into a plurality of independent feeding slots by the microstrip lines in the millimeter-wave band, thereby improving the isolation between the millimeter-wave patch units.

[0010] Further, the positions of the microstrip lines are on both sides of the millimeter-wave patch units and straddle the dual-functional slot.

[0011] Further, one end of the dual-functional slot is open at the edge of the metal ground plane, and resonates in the 0.25λ2, 0.5λ2, 0.75λ2, λ2 or 1.25λ2 resonance modes, where λ2 is the equivalent guided-wave wavelength in the medium of the second resonance frequency in the microwave band.

[0012] Further, the millimeter-wave patch units operate in the TM 01 or TM 10 resonance modes, and the millimeter-wave patch units are linearly arranged along the dual-functional slot to form a millimeter-wave phased array. By exciting the millimeter-wave patch units with different phase differences, beam scanning in the millimeter-wave band is achieved.

[0013] Further, the millimeter-wave patch units are coupled and fed through millimeter-wave feed lines passing through the dual-functional slot.

[0014] Further, the millimeter-wave patch units are fed through millimeter-wave connectors. The inner conductor of the millimeter-wave connector is connected to the millimeter-wave feed line, and the outer conductor is grounded through a shorting pad.

[0015] Further, interdigital structures are introduced into the millimeter-wave feed lines. The introduced interdigital structures are equivalent to band-pass resonant structures in the millimeter-wave band and equivalent to band-stop resonant structures in the microwave band.

[0016] Further, a dual-band slot is etched on the metal ground plane beside the dual-functional slot to achieve triple-band coverage in the microwave band;

[0017] The dual-band slot covers the first and third microwave bands, and the dual-band slot operates both in the 0.25λ1, 0.5λ1, 0.75λ1, λ1 or 1.25λ1 resonance modes and in the 0.25λ3, 0.5λ3, 0.75λ3, λ3 or 1.25λ3 resonance modes, where λ1 and λ3 are the equivalent guided-wave wavelengths in the media of the first and third resonance frequencies in the microwave band, respectively.

[0018] Further, the dual-functional slot and the dual-band slot are fed through bent feed lines to improve impedance matching.

[0019] Furthermore, the microwave and millimeter-wave common-aperture antenna is designed as a narrowband and slender structure, so as to be easily integrated into wearable devices.

[0020] Furthermore, the millimeter-wave patch unit is arranged in the dual-functional slot, and / or the millimeter-wave patch unit is arranged on the third plane.

[0021] Furthermore, the microstrip line is a rectangular microstrip line or an I-shaped microstrip line.

[0022] The second technical solution adopted by the present invention is:

[0023] A microwave and millimeter-wave different-frequency decoupling method, applied to the microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing described above, includes the following steps:

[0024] Introduce interdigital structures in the millimeter-wave feeder line, and realize the frequency selection function of band-pass in the millimeter-wave band and band-stop in the microwave band by adjusting the interdigital structures;

[0025] When the dual-functional slot is excited in the microwave band, due to the band-stop function of the microwave band of the millimeter-wave feeder line, microwave signals cannot enter the millimeter-wave port of the millimeter-wave patch unit through the millimeter-wave feeder line, thereby improving the isolation between the microwave port and the millimeter-wave port; at the same time, when millimeter-wave signals are fed into the millimeter-wave port, due to the band-pass function of the millimeter-wave band of the millimeter-wave feeder line, the millimeter-wave signals are coupled to the millimeter-wave patch unit for radiation.

[0026] The third technical solution adopted by the present invention is:

[0027] A wearable device includes the microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing described above, or is used to implement the microwave and millimeter-wave different-frequency decoupling method described above.

[0028] Optionally, for this wearable glasses device, the wearable microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing is integrated on the temple of the wearable glasses device, covering both microwave and millimeter-wave band communications at the same time, and realizing a conformal design.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects and advantages:

[0030] (1) Simple structure, convenient design, miniaturized and low-profile.

[0031] (2) Multi-frequency broadband coverage effect for Sub-6GHz, covering GPS, 2.4G-Wi-Fi and 5G-N78 bands.

[0032] (3) The reflection coefficient of each microwave band is lower than -10dB, which is better than the industry standard of -6dB.

[0033] (4) Achieve simultaneous coverage of microwave and millimeter wave, with high gain in each frequency band.

[0034] (5) Achieve an omnidirectional radiation pattern in the microwave band and beam scanning in the millimeter wave band to increase the signal coverage area.

[0035] (6) Achieve a low SAR value in each frequency band to meet industry standards.

[0036] (7) Use the decoupling method to improve the isolation between different frequencies of microwave and millimeter wave, and improve the radiation pattern and efficiency of the microwave band.

[0037] (8) Introduce a band-pass structure into the millimeter wave feeder line to improve the isolation of the same frequency of millimeter wave and improve the radiation pattern of millimeter wave.

[0038] (9) It is easy to integrate with smart glasses devices to achieve a conformal design. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following introduces the drawings related to the technical solutions in the embodiments of the present invention or the prior art. It should be understood that the drawings introduced below are only for clearly expressing some embodiments of the technical solutions in the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 FIG. is a schematic structural diagram of a wearable microwave and millimeter wave co-aperture antenna based on slot structure multiplexing provided in Embodiment 1 of the present invention.

[0041] Figure 2 FIG. is a schematic diagram of the integration of Embodiment 1 of the present invention with a glasses device.

[0042] Figure 3 FIG. is the reflection coefficient diagram of Embodiment 1 of the present invention.

[0043] Figure 4 FIG. is the transmission coefficient diagram of Embodiment 1 of the present invention.

[0044] Figure 5 FIG. is the radiation pattern of the element in the center of the array at 26 GHz in Embodiment 1 of the present invention.

[0045] Figure 6 FIG. is the microwave radiation pattern of Embodiment 1 of the present invention.

[0046] Figure 7 FIG. is the millimeter wave scanning radiation pattern of Embodiment 1 of the present invention.

[0047] Figure 8 FIG. is the gain diagram of Embodiment 1 of the present invention.

[0048] Figure 9 Schematic diagram of the antenna structure provided in Embodiment 2 of the present invention.

[0049] Figure 10 Schematic diagram of the antenna structure provided in Embodiment 3 of the present invention.

[0050] Figure 11 Schematic diagram of the antenna structure provided in Embodiment 4 of the present invention.

[0051] Figure 12 Schematic diagram of the antenna structure provided in Embodiment 5 of the present invention.

[0052] Figure 13 Schematic diagram of the antenna structure provided in Embodiment 6 of the present invention.

[0053] Reference numerals: 1 - first dielectric substrate, 2 - second dielectric substrate, 3 - millimeter-wave patch unit, 4 - metal floor, 5 - dual-functional slot, 6 - dual-band slot, 7 - bent feeder line, 8 - millimeter-wave feeder line, 9 - interdigital structure, 10 - microstrip line, 11 - shorting pad, 12 - first port, 13 - second port, 14 - third port, 15 - fourth port, 16 - fifth port, 17 - glasses device, 18 - parallel-plate capacitor structure, 19 - type-I microstrip line. Detailed implementation manners

[0054] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation of the present application. For the step numbers in the following embodiments, they are only set for the convenience of description and explanation, and no limitation is imposed on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0055] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. The singular forms "a", "the", and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. In addition, unless otherwise clearly defined, words such as "set", "installed", and "connected" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0056] In the description of the present application, it should be understood that with respect to the orientation description, for example, the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0057] In the description of the present application, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, "greater than", "less than", "exceeding", etc. are understood not to include the recited number, and "above", "below", "within", etc. are understood to include the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0058] In the description of the present application, "and / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and back associated objects.

[0059] Embodiment 1

[0060] This embodiment provides a wearable microwave millimeter-wave common-aperture antenna based on slot structure multiplexing, a microwave millimeter-wave different-frequency decoupling method, and an integrated wearable glasses device.

[0061] Such as Figure 1As shown, the common-aperture antenna includes a first dielectric substrate 1 and a second dielectric substrate 2. The models of the dielectric substrates are both TLY-5, with a dielectric constant of 2.2 and a loss tangent of 0.0027. The thicknesses are 0.787 mm and 0.254 mm respectively. Four millimeter-wave patch units 3 are printed above the first dielectric substrate 1 to form a millimeter-wave array. A metal floor 4 is printed above the second dielectric substrate 2, and a dual-functional slot 5 and a dual-band slot 6 are etched on the metal floor 4. A bent feeder 7, a millimeter-wave feeder 8, a microstrip line 10, and a shorting pad 11 are printed below the second dielectric substrate 2. The millimeter-wave feeder 8 is successively provided with a first port 12, a second port 13, a third port 14, and a fourth port 15 from right to left near one end of the edge of the metal floor. One end of the bent feeder 7 near the edge is provided with a fifth port 16. The bent feeder 7 is located directly below the dual-functional slot 5 and the dual-band slot 6, feeding the two slots simultaneously to achieve multi-band operation. The millimeter-wave feeder 8 is located directly below the millimeter-wave patch unit 3 and the dual-functional slot 5. The interdigital structure 9 forms a band-pass filter to achieve conduction in the millimeter-wave band and blockage in the microwave band, improving the antenna's different-frequency isolation. The microstrip line 10 is a rectangular structure, located between the millimeter-wave patch units 3, and both ends span the dual-functional slot 5. A band-pass filter is also formed between the microstrip line 10 and the dual-functional slot 5 to achieve conduction in the millimeter-wave band and blockage in the microwave band. In the microwave band, current cannot pass through the microstrip line 10, and the complete dual-functional slot 5 realizes radiation. In the millimeter-wave band, the current on the metal floor 4 is conducted through the microstrip line 10, and the dual-band slot 6 is divided into multiple independent feeding slots. The millimeter-wave patch unit 3 is coupled and fed through the dual-functional slot by the millimeter-wave feeder 8, improving the isolation between the millimeter-wave patch units 3. Therefore, the dual-functional slot 5 serves both as a radiation structure for the second microwave band and is reused as a feeding structure for the millimeter-wave band.

[0062] As Figure 2 shown, due to the structural reuse of the dual-functional slot 5, the antenna is miniaturized and can be integrated on the temple of the glasses device 17 to achieve a conformal design.

[0063] It should be noted that in this embodiment, the antenna is integrated on the temple, but it is not limited to this application scenario. Application scenarios integrated into other devices (such as the brim of a hat) also fall within the protection scope of the present invention.

[0064] As Figure 3 shown, since the antenna has multiple slots, it covers multiple frequency bands of 1.23 - 1.68 GHz, 2.4 - 2.51 GHz, and 2.98 - 3.60 GHz in the microwave band. In the millimeter-wave band, the antenna impedance bandwidth is 24.1 - 28.6 GHz.

[0065] As Figure 4As shown, when the antenna is directly fed through the millimeter-wave feeder line 8 without the interdigital structure 9, the transmission coefficient between the fifth port 17 and the first port 13 in the microwave band is -3.8 dB. When the antenna is fed through the millimeter-wave feeder line 8 with the interdigital structure 9, the transmission coefficient between the fifth port 16 and the first port 12 in the microwave band is optimized to reach -16.39 dB, achieving cross-frequency decoupling. At the same time, the transmission coefficient between the third port 14 and the fourth port 15 of the antenna in the millimeter-wave band is improved by 8.3 dB after adding the microstrip line 10, and the in-band transmission coefficient is less than -15 dB. As Figure 5 shown, the introduction of the microstrip line 10 can also improve the radiation pattern of the millimeter-wave patch unit 3, enhancing the directivity and gain of the millimeter-wave patch unit 3.

[0066] As Figure 6 and Figure 7 shown, the radiation pattern of the antenna in the microwave band is close to an omnidirectional pattern, and a scan of -42° to 47° is achieved on the plane where phi = 0° in the millimeter-wave band.

[0067] As Figure 8 shown, the actual gains of the antenna at three microwave frequencies of 1.575 GHz, 2.4 GHz, and 3.5 GHz are 2.4, 1.94, and 4.04 dBi respectively. The actual axial gain of the antenna in the millimeter-wave band is 10.7 dBi.

[0068] Embodiment 2

[0069] Figure 9 FIG. shows the schematic structure of a wearable microwave millimeter-wave co-aperture antenna based on slot structure multiplexing provided in Embodiment 2. Embodiment 2 also uses slots to achieve radiation in the microwave band and feeding in the millimeter-wave band. The difference from Embodiment 1 is that one end of the dual-functional slot 5 and the dual-band slot 6 etched on the metal floor 4 is replaced from open circuit to short circuit at the floor edge.

[0070] Embodiment 3

[0071] Figure 10 FIG. shows the schematic structure of a wearable microwave millimeter-wave co-aperture antenna based on slot structure multiplexing provided in Embodiment 3. The millimeter-wave patch unit 3 in Embodiment 3 uses coupled feeding in the same way as the millimeter-wave patch unit 3 in Embodiment 1, but the form of the millimeter-wave feeder line 8 is different. Embodiment 1 uses the interdigital structure 9, and the filtering performance is adjusted by adjusting the length and width of the interdigital structure 9. Embodiment 3 is the parallel-plate capacitor structure 18, and the filtering performance is adjusted by adjusting the length and distance of the parallel branches between the parallel-plate capacitor structures 18.

[0072] Embodiment 4

[0073] Figure 11Schematic diagram of the wearable microwave millimeter-wave common-aperture antenna based on slot structure multiplexing provided for Embodiment 4. The millimeter-wave patch unit 3 and the feeding microstrip line in Embodiment 4 are the same as those in Embodiment 1, but the shape of the parasitic unit is different. The microstrip line 10 with a rectangular shape is adopted in Embodiment 1, while the I-shaped microstrip line 19 is adopted in Embodiment 4. The widths at both ends can be used to adjust the equivalent distributed capacitance between the metal floor 4, so as to adjust the band-pass performance.

[0074] Embodiment 5

[0075] Figure 12 Schematic diagram of the wearable microwave millimeter-wave common-aperture antenna based on slot structure multiplexing provided for Embodiment 5. The millimeter-wave patch unit 3 in Embodiment 5 adopts the same structure as the millimeter-wave patch unit 3 in Embodiment 1, but the positions are different. The millimeter-wave patch unit 3 in Embodiment 1 is located above the first dielectric substrate 1, while the millimeter-wave patch unit 3 in Embodiment 5 is located above the second dielectric substrate 2. Inside the dual-functional slot 5, the millimeter-wave patch unit 3 and the metal floor 4 are on the same layer, and the millimeter-wave feeding line 8 directly couples to feed the millimeter-wave patch unit 3.

[0076] Embodiment 6

[0077] Figure 13 Schematic diagram of the wearable microwave millimeter-wave common-aperture antenna based on slot structure multiplexing provided for Embodiment 6. Embodiment 6 and Embodiment 1 also use the millimeter-wave patch unit 3 for radiation in the millimeter-wave band, but the number of millimeter-wave patch units 3 is different. The millimeter-wave patch unit 3 in each millimeter-wave array unit in Embodiment 1 is a single group and is located above the first dielectric substrate 1, while the millimeter-wave patch unit 3 in each millimeter-wave unit in Embodiment 6 is a double group and is located above the first dielectric substrate 1 and above the second dielectric substrate 2 respectively. Multiple millimeter-wave patch units 3 can achieve multi-frequency and broadband working performances.

[0078] In summary, the wearable microwave and millimeter-wave common-aperture antenna based on slot structure reuse provided by the present invention has a dual-functional slot that serves as both a radiation structure in the microwave band and a feeding structure for the millimeter-wave patch element. The microstrip lines arranged in parallel below the dual-functional slot electrically divide the dual-functional slot into multiple independent feeding slots in the millimeter-wave band, improving the isolation between the millimeter-wave patch elements. The microwave and millimeter-wave heterodyne decoupling method includes an equivalent capacitance introduced by the interdigital structure in the millimeter-wave feeding line, realizing the performance of a band-pass in the millimeter-wave band and a band-stop in the microwave band, and improving the heterodyne isolation. The wearable microwave and millimeter-wave common-aperture antenna based on slot structure reuse has a narrow-band and slender shape, is easy to integrate with wearable glasses devices, and realizes microwave and millimeter-wave communications for wearable glasses devices. Compared with the existing common-aperture antennas, the present invention has the advantages of simple structure, low profile, miniaturization, and high isolation, and can be integrated into wearable glasses devices, covering both the microwave and millimeter-wave bands at the same time.

[0079] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0080] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those ordinary skilled in the art to understand the content of the present invention and implement it accordingly. It is not intended to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the essence of the content of the present invention should be covered within the protection scope of the present invention.

Claims

1. A microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing, characterized in that, Comprising: A metal floor, arranged on a first plane, etched with dual-functional slots; The dual-functional slots serve both as a radiation structure for the second microwave frequency band and are reused as a coupling feed structure for a millimeter-wave array; A plurality of millimeter-wave patch units, whose positions match the dual-functional slots; A millimeter-wave co-frequency decoupling structure, arranged on a second plane, comprising a plurality of microstrip lines arranged in parallel; the dual-functional slots are equivalently electrically divided into a plurality of independent feed slots by the microstrip lines in the millimeter-wave frequency band, thereby improving the isolation between the millimeter-wave patch units.

2. The microwave and millimeter-wave common aperture antenna based on slot structure multiplexing according to claim 1, wherein The positions of the microstrip lines are on both sides of the millimeter-wave patch units and straddle the dual-functional slots.

3. The microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing according to claim 1, wherein The dual-functional slots operate in 0.25λ2, 0.5λ2, 0.75λ2, λ2 or 1.25λ2 resonance modes, where λ2 is the equivalent guided wavelength in the medium of the second resonance frequency of the microwave frequency band.

4. A microwave and millimeter-wave common aperture antenna based on slot structure multiplexing according to claim 1, characterized in that, The millimeter wave patch unit operates in TM 01 or TM 10 In the resonant mode, each millimeter wave patch unit is linearly arranged along the dual-function slot to form a millimeter wave phased array, and the millimeter wave patch units are excited by different phase differences to achieve beam scanning in the millimeter wave frequency band.

5. A microwave and millimeter-wave common aperture antenna based on slot structure multiplexing according to claim 1, characterized in that, The millimeter-wave patch units are coupled and fed through millimeter-wave feed lines passing through the dual-functional slots.

6. The microwave and millimeter-wave common aperture antenna based on slot structure multiplexing according to claim 5, characterized in that, An interdigital structure is introduced in the millimeter-wave feed line. The introduced interdigital structure is equivalent to a band-pass resonant structure in the millimeter-wave frequency band and equivalent to a band-stop resonant structure in the microwave frequency band.

7. A microwave and millimeter-wave common aperture antenna based on slot structure multiplexing according to claim 1, characterized in that The metal floor is etched with dual-frequency slots beside the dual-functional slots to achieve triple-band coverage in the microwave frequency band; The dual-frequency slots cover the first and third microwave frequency bands. The dual-frequency slots operate in 0.25λ1, 0.5λ1, 0.75λ1, λ1 or 1.25λ1 resonance modes and also operate in 0.25λ3, 0.5λ3, 0.75λ3, λ3 or 1.25λ3 resonance modes, where λ1 and λ3 are the equivalent guided wavelengths in the medium of the first and third resonance frequencies of the microwave frequency band respectively.

8. The microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing according to claim 7, wherein The dual-functional slots and the dual-frequency slots are fed through bent feed lines to improve impedance matching.

9. A microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing according to claim 1, wherein The microwave-millimeter-wave common-aperture antenna is designed as a narrow-band slender structure.

10. A microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing according to claim 1, characterized in that, The millimeter-wave patch units are arranged in the dual-functional slots, and / or, the millimeter-wave patch units are arranged on a third plane.

11. A microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing according to claim 1, characterized in that, The microstrip lines are rectangular microstrip lines or I-shaped microstrip lines.

12. A microwave and millimeter-wave different-frequency decoupling method, applied to the microwave and millimeter-wave common-aperture antenna based on slot structure multiplexing according to any one of claims 1-11, characterized in that, Including the following steps: An interdigital structure is introduced in the millimeter-wave feed line. By adjusting the interdigital structure, a frequency selection function of band-pass in the millimeter-wave band and band-stop in the microwave frequency band is realized; When the dual-functional slots are excited in the microwave frequency band, due to the band-stop function of the microwave frequency band of the millimeter-wave feed line, microwave signals cannot enter the millimeter-wave ports of the millimeter-wave patch units through the millimeter-wave feed line, thereby improving the isolation between the microwave ports and the millimeter-wave ports; meanwhile, when millimeter-wave signals are fed into the millimeter-wave ports, due to the band-pass function of the millimeter-wave band of the millimeter-wave feed line, the millimeter-wave signals are coupled to the millimeter-wave patch units for radiation.

13. A wearable device, characterized in that, Including the microwave-millimeter-wave common-aperture antenna based on slot structure multiplexing according to any one of claims 1-11, or a method for realizing microwave-millimeter-wave co-frequency decoupling according to claim 12.

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