Multi-parasitic element flexible patch antenna

Abstract

The invention discloses a multi-parasitic element flexible patch antenna, which comprises an antenna body, the antenna body comprises a reflecting layer, the top of the reflecting layer is fixedly provided with a main radiation element and a plurality of parasitic elements, and the plurality of parasitic elements are symmetrically arranged at the two sides of the main radiation element. According to the multi-parasitic element flexible patch antenna, the main radiation element and the plurality of narrow parasitic elements are installed on the reflecting layer, and the main radiation element and the parasitic elements are mutually independent and are not connected, so that the antenna still has a good conformal integration capability when the thickness of the antenna is large, and the antenna is suitable for assembly on a complex curved surface; the main radiation base material and the parasitic medium base material are manufactured through the flexible material, the antenna body can be conveniently bent in the parasitic element arrangement direction, storage and transportation are facilitated, meanwhile, the antenna can be easily integrated on a flexible or conformal carrier, and the antenna is particularly suitable for a conformal or flexible array antenna.

Description

Technical Field

[0001] The invention relates to the technical field of microwave antennas, in particular to a multi-parasitic element flexible patch antenna. Background Art

[0002] Flexible and conformal antennas are potential front-end devices for a variety of application scenarios. As wearable and stretchable antennas used in scenarios such as near-field communication and PH measurement, this type of antenna is integrated into the flexible surface of the carrier and can be stretched and bent accordingly. However, when the system operating frequency is low, the antenna thickness is large. For antennas operating in the L band and below, their thickness often exceeds 1 cm. When the antenna is thicker, the bending and stretching capabilities decrease rapidly, making it difficult to meet the requirements of wearable and conformal integration. In addition, in the patch antenna, the aspect ratio of the outer metal patch is close to 1, and the length and width are both approximately 0.4 times the operating wavelength. When the antenna operating frequency band is low, the metal patch is large in size, and it is also difficult to bend after being bonded and fixed to the substrate. The narrowing of the metal patch is conducive to the bending of the antenna along the width of the patch, but at this time the antenna radiation resistance is small and matching is more difficult.

[0003] Based on the search of the above information, a multi-parasitic element patch antenna is proposed. Under the premise of maintaining a large thickness, it still has a flexible structural function in the direction of parasitic element arrangement and can be adapted to bendable and conformal carriers. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a multi-parasitic element flexible patch antenna, which solves the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-parasitic element flexible patch antenna, comprising an antenna body, the antenna body comprising a reflective layer, a main radiating element and a plurality of parasitic elements are fixedly mounted on the top of the reflective layer, and the plurality of parasitic elements are symmetrically arranged on both sides of the main radiating element.

[0006] The present invention is further configured as follows: the main radiation element comprises a main radiation substrate, a main radiation patch is bonded and fixed on the top of the main radiation substrate, and a feeding component is also arranged in the main radiation substrate; The bottom of the main radiation substrate is bonded and fixed to the top of the reflection layer.

[0007] The present invention is further configured as follows: the main radiation substrate is made of foam or rubber material, and the main radiation patch is a metal thin layer.

[0008] The present invention is further configured as follows: the feeding component comprises a metal probe and a feeding patch, one end of the metal probe penetrates through and is fixed to the feeding patch; The other end of the metal probe passes through the main radiation substrate and is fixedly mounted with a connector.

[0009] The present invention is further configured as follows: a cover plate is also arranged between the main radiation substrate and the main radiation patch, the feeding patch is arranged between the cover plate and the main radiation substrate, and the top and bottom of the cover plate are respectively bonded and fixed to the opposite side of the main radiation substrate and the main radiation patch.

[0010] The present invention is further configured as follows: a plurality of first load-reducing holes are opened on the top of the main radiation substrate.

[0011] The present invention is further configured as follows: the parasitic element comprises a parasitic dielectric substrate and a parasitic patch, and the parasitic patch is bonded and fixed on the top of the parasitic dielectric substrate; The bottom of the parasitic dielectric substrate is bonded and fixed to the top of the reflective layer, and a plurality of second load-reducing holes are opened on the surface of the parasitic dielectric substrate.

[0012] The present invention is further configured as follows: the parasitic medium substrate is made of foam or rubber material, and the parasitic patch is a metal thin layer.

[0013] The present invention provides a multi-parasitic element flexible patch antenna, which has the following beneficial effects: The present invention installs a main radiating element and a plurality of narrower parasitic elements on a reflective layer, wherein the main radiating element and the parasitic elements are independent of each other and are not connected, so that the antenna itself can still have good conformal integration capability when the thickness is large, and is suitable for assembly on complex curved surfaces. The main radiating substrate and the parasitic medium substrate are made of flexible materials, which facilitates the bending of the antenna body along the arrangement direction of the parasitic elements, facilitates storage and transportation, and is easy to be integrated into a flexible or conformal carrier, and is particularly suitable for conformal or flexible array antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the external structure of the present invention; Figure 2 It is a structural schematic diagram of the main radiation element of the present invention; Figure 3 It is a structural schematic diagram of the parasitic element of the present invention; Figure 4 FIG. 4 is a schematic diagram of assembling the antenna body on a curved surface in an embodiment of the present invention.

[0015] In the figure: 1. Antenna body; 2. Reflective layer; 3. Main radiation element; 301. Main radiation substrate; 302. Main radiation patch; 303. Feeding assembly; 3031. Metal probe; 3032. Feeding patch; 3033. Connector; 304. Cover plate; 305. First load-reducing hole; 4. Parasitic element; 401. Parasitic dielectric substrate; 402. Parasitic patch; 403. Second load-reducing hole. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0017] See also Figure 1-4 The embodiment of the present invention provides the following technical solutions: a multi-parasitic element flexible patch antenna, comprising an antenna body 1, the antenna body 1 comprising a reflective layer 2, a main radiating element 3 and a plurality of parasitic elements 4 are fixedly mounted on the top of the reflective layer 2, the plurality of parasitic elements 4 are symmetrically arranged on both sides of the main radiating element 3, so that the antenna body 1 can be bent along the arrangement direction of the parasitic elements 4 to improve the conformal capability of the antenna body 1, specifically, the parasitic element 4 and the main radiating element 3 are independent of each other and are not connected, the relative position of the parasitic element 4 and the main radiating element 3 determines the working bandwidth of the antenna body 1, which needs to be determined based on electromagnetic simulation, such as the spacing between adjacent parasitic elements 4 is about 0.02 times the working wavelength, and the spacing between the main radiating element 3 and the adjacent parasitic element 4 is about 0.02 times the working wavelength.

[0018] As a preferred solution, in order to further improve the conformal capability of the antenna body 1, the main radiating element 3 includes a main radiating substrate 301, a plurality of first load-reducing holes 305 are opened on the top of the main radiating substrate 301, and the arrangement of the plurality of first load-reducing holes 305 can improve the flexibility of the antenna body 1, the bottom of the main radiating substrate 301 is bonded and fixed to the top of the reflective layer 2, a main radiating patch 302 is bonded and fixed to the top of the main radiating substrate 301, a cover plate 304 is further arranged between the main radiating substrate 301 and the main radiating patch 302, and the top and bottom of the cover plate 304 are respectively opposite to the main radiating substrate 301 and the main radiating patch 302. One side is bonded and fixed, and a feeding component 303 is also provided in the main radiation substrate 301. Specifically, the feeding component 303 includes a metal probe 3031 and a feeding patch 3032. One end of the metal probe 3031 passes through and is fixed to the feeding patch 3032. The feeding patch 3032 is arranged between the cover plate 304 and the main radiation substrate 301. The sizes of the metal probe 3031 and the feeding patch 3032 are determined by electromagnetic simulation. The length and width of the feeding patch 3032 are approximately 0.12 times and 0.1 times the working wavelength, respectively. The other end of the metal probe 3031 passes through the main radiation substrate 301 and is fixedly installed with a connector 3033.

[0019] As an optional solution, the other end of the metal probe 3031 passes through the main radiation substrate 301 and is fixedly installed with an external cable.

[0020] To further illustrate, the cover plate 304 and the main radiation substrate 301 are both made of foam or rubber material, the thickness of the main radiation substrate 301 is determined based on electromagnetic simulation, and can be as low as 0.04 times the working wavelength, and the main radiation patch 302 is a thin metal layer, wherein the length and width of the main radiation patch 302 are determined by electromagnetic simulation, such as a length of approximately 0.4 times the working wavelength, and a width of approximately 0.15 times the working wavelength.

[0021] As a preferred embodiment, the parasitic element 4 includes a parasitic dielectric substrate 401 and a parasitic patch 402, the parasitic patch 402 is bonded and fixed to the top of the parasitic dielectric substrate 401, the thickness of the parasitic dielectric substrate 401 is determined based on electromagnetic simulation, and can be as low as 0.04 times the working wavelength, the parasitic dielectric substrate 401 is made of foam or rubber material, the parasitic patch 402 is a thin metal layer, the length and width of the parasitic patch 402 are determined based on electromagnetic simulation, such as a length of approximately 0.4 times the working wavelength, and a width of approximately 0.04 times the working wavelength, the bottom of the parasitic dielectric substrate 401 is bonded and fixed to the top of the reflective layer 2, and a plurality of second load-reducing holes 403 are provided on the surface of the parasitic dielectric substrate 401, and the provision of the plurality of second load-reducing holes 403 can improve the flexibility of the antenna body 1.

[0022] For further explanation, see the attached Figure 4 As shown, the antenna body 1 can be conformally attached to a curved carrier, wherein the curvature radius of the carrier can be as low as 0.8 times the operating wavelength. It can be seen that the antenna body 1 still has good conformal integration capability when its thickness is relatively large, and is suitable for assembly on complex curved surfaces.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-parasitic element flexible patch antenna, comprising an antenna body (1), characterized in that: The antenna body (1) comprises a reflective layer (2), a main radiating element (3) and a plurality of parasitic elements (4) are fixedly mounted on the top of the reflective layer (2), and the plurality of parasitic elements (4) are symmetrically arranged on both sides of the main radiating element (3).

2. The multi-parasitic element flexible patch antenna according to claim 1, characterized in that: The main radiation element (3) comprises a main radiation substrate (301), a main radiation patch (302) is bonded and fixed to the top of the main radiation substrate (301), and a feeding component (303) is also provided in the main radiation substrate (301); The bottom of the main radiation substrate (301) is bonded and fixed to the top of the reflection layer (2).

3. The multi-parasitic element flexible patch antenna according to claim 2, characterized in that: The main radiation substrate (301) is made of foam or rubber material, and the main radiation patch (302) is a metal thin layer.

4. The multi-parasitic element flexible patch antenna according to claim 3, characterized in that: The feeding component (303) comprises a metal probe (3031) and a feeding patch (3032), and one end of the metal probe (3031) penetrates through and is fixed to the feeding patch (3032); The other end of the metal probe (3031) passes through the main radiation substrate (301) and is fixedly mounted with a connector (3033).

5. The multi-parasitic element flexible patch antenna according to claim 4, characterized in that: A cover plate (304) is further provided between the main radiation substrate (301) and the main radiation patch (302); the feed patch (3032) is provided between the cover plate (304) and the main radiation substrate (301); and the top and bottom of the cover plate (304) are respectively bonded and fixed to the side opposite to the main radiation substrate (301) and the main radiation patch (302).

6. The multi-parasitic element flexible patch antenna according to claim 2, characterized in that: A plurality of first load-reducing holes (305) are provided on the top of the main radiation substrate (301).

7. The multi-parasitic element flexible patch antenna according to claim 1, characterized in that: The parasitic element (4) comprises a parasitic medium substrate (401) and a parasitic patch (402), wherein the parasitic patch (402) is bonded and fixed on the top of the parasitic medium substrate (401); The bottom of the parasitic dielectric substrate (401) is bonded and fixed to the top of the reflective layer (2), and a plurality of second load-reducing holes (403) are provided on the surface of the parasitic dielectric substrate (401).

8. The multi-parasitic element flexible patch antenna according to claim 7, characterized in that: The parasitic medium substrate (401) is made of foam or rubber material, and the parasitic patch (402) is a metal thin layer.

Images