A differential gap antenna

Abstract

The application provides a differential gap antenna, which comprises a dielectric substrate, a metal plate attached to the dielectric substrate, and a dielectric resonator installed on the metal plate, wherein the metal plate is provided with a feed structure and a plurality of ground holes, the feed structure comprises a first feed slot, a second feed slot and a differential structure, the differential structure is arranged at the connection of the first feed slot and the second feed slot, the plurality of ground holes are respectively arranged around the differential structure, the first feed slot and the second feed slot are of the same structure, and the dielectric resonator is pressed on the feed structure, compared with a conventional feed structure, the bandwidth is improved and the adaptability in different scenes is improved.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more particularly to a differential gap antenna. Background Technology

[0002] A dielectric resonator is a high-performance antenna used in 5G millimeter-wave mobile devices. It consists of two parts: a radiating structure and a feeding structure. Once the structural parameters of the dielectric resonator are selected, the set of resonant modes is also determined. The primary function of the feeding structure is to excite the desired operating mode in the dielectric resonator and to achieve impedance matching between the feed port and the transmission line. Simultaneously, within the antenna's operating frequency band, the feeding structure must avoid exciting other modes in the dielectric resonator, ensuring that all the energy input at the port is transferred to the desired operating mode, which is then radiated into free space.

[0003] The operating bandwidth of existing conventional power supply structures is generally 22.5-26GHz, which is a relatively narrow bandwidth range and cannot be well applied in different scenarios. Summary of the Invention

[0004] The main objective of this invention is to provide a differential gap antenna that solves the aforementioned technical problems.

[0005] The present invention provides a differential gap antenna in a first aspect, comprising a dielectric substrate, a metal plate attached to the dielectric substrate, and a dielectric resonator mounted on the metal plate. The metal plate has a feeding structure and a plurality of ground holes. The feeding structure includes a first feeding slot, a second feeding slot, and a differential structure. The differential structure is disposed at the connection between the first feeding slot and the second feeding slot. The plurality of ground holes are respectively disposed around the differential structure. The first feeding slot and the second feeding slot have the same structure. The dielectric resonator is overlaid on the feeding structure.

[0006] Preferably, both the first power supply gap and the second power supply gap include a |-shaped gap, a C-shaped gap, and an L-shaped gap. The |-shaped gap is connected to the first end of the C-shaped gap and extends in a first direction, and the L-shaped gap is connected to the second end of the C-shaped gap and extends in the first direction.

[0007] Preferably, the length of the first end of the C-shaped slit is greater than the length of the second end of the C-shaped slit.

[0008] Preferably, the distance between the two ends of the U-shaped slit is 15.6 mm.

[0009] Preferably, the differential structure includes a U-shaped slot, the two ends of which are connected to the L-shaped slots of the first power supply slot and the second power supply slot, respectively, and the U-shaped slot extends in a first direction.

[0010] Preferably, the differential structure includes a signal aperture, and the U-shaped slit partially covers the opening of the signal aperture.

[0011] Preferably, the distance between the two ends of the U-shaped slit is 0.6 mm.

[0012] Preferably, there are three ground holes, which are respectively located at three positions on the closed end of the U-shaped gap.

[0013] Preferably, the distance between the I-shaped gap of the first power supply gap and the I-shaped gap of the second power supply gap is 4 mm.

[0014] Preferably, the width of all gaps in the power supply structure is 0.3 mm.

[0015] The beneficial effects of this invention are as follows: It provides a differential gap antenna, which includes a dielectric substrate, a metal plate attached to the dielectric substrate, and a dielectric resonator mounted on the metal plate. The metal plate is provided with a feeding structure and multiple ground holes. The feeding structure includes a first feeding slot, a second feeding slot, and a differential structure. The differential structure is disposed at the connection between the first feeding slot and the second feeding slot. The multiple ground holes are respectively placed around the differential structure. The first feeding slot and the second feeding slot have the same structure. The dielectric resonator is overlaid on the feeding structure. Compared with conventional feeding structures, this improves bandwidth and enhances adaptability in different scenarios. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a top view of an embodiment of the present invention; Figure 3 This is a schematic diagram of the feeder structure in this invention; Figure 4 This is a comparison chart of the S-parameter performance of this embodiment and a conventional power supply structure in this invention.

[0017] Table of labels in the diagram: Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0019] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains.

[0020] The terms "first," "second," and similar words used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] See appendix Figure 1 -Appendix Figure 4 The present invention provides a differential gap antenna in a first aspect, comprising a dielectric substrate 100, a metal plate 200 attached to the dielectric substrate 100, and a dielectric resonator 500 mounted on the metal plate 200. The metal plate 200 is provided with a feeding structure 300 and a plurality of ground holes 400. The feeding structure 300 includes a first feeding gap 301, a second feeding gap 302, and a differential structure 303. The differential structure 303 is disposed at the connection between the first feeding gap 301 and the second feeding gap 302. The plurality of ground holes 400 are respectively disposed around the differential structure 303. The first feeding gap 301 and the second feeding gap 302 have the same structure. The dielectric resonator 500 is pressed onto the feeding structure 300.

[0023] The first power supply gap 301 and the second power supply gap 302 both include a |-shaped gap 600, a C-shaped gap 700 and an L-shaped gap 800. The |-shaped gap 600 is connected to the first end of the C-shaped gap 700 and extends in the first direction. The L-shaped gap 800 is connected to the second end of the C-shaped gap 700 and extends in the first direction.

[0024] Furthermore, the length of the first end of the C-shaped slot 700 is greater than the length of the second end of the C-shaped slot 700. The distance 'a' between the two ends of the C-shaped slot 700 is 15.6 mm. The differential structure 303 includes a U-shaped slot 3031, the two ends of which are connected to the L-shaped slot 800 of the first power supply slot 301 and the L-shaped slot 800 of the second power supply slot 302, respectively. The U-shaped slot 3031 extends in the first direction.

[0025] Furthermore, the differential structure 303 includes a signal aperture 3032, and a U-shaped slit 3031 partially encloses the opening of the signal aperture 3032.

[0026] Furthermore, the distance c between the two ends of the U-shaped slit 3031 is 0.6 mm.

[0027] Furthermore, there are three ground holes 400, which are respectively located at three positions on the closed end of the U-shaped gap 3031.

[0028] Furthermore, the distance b between the I-shaped slot 600 of the first power supply slot 301 and the I-shaped slot 600 of the second power supply slot 302 is 4mm.

[0029] Specifically, the first feed slot 301 and the second feed slot 302 are symmetrical structures with the differential structure 303 as the axis of symmetry. The width d of all slots in the feed structure 300 is 0.3 mm. The first feed slot 301, the second feed slot 302, and the differential structure 303 enclose a rectangular-like structure. One side of this rectangular structure has a gap, which is formed by the extension of both the I-shaped slot 600 of the first feed slot 301 and the I-shaped slot 600 of the second feed slot 302 in the first direction. The distance between the two ends of the I-shaped slot 700 is... The distance between the two ends of the U-shaped slot 700 is 15.6 mm. If the distance between the two ends is less than half the wavelength of the electromagnetic wave generated by the differential gap antenna, the direction of the electromagnetic field generated by the differential gap antenna will be opposite, which will lead to a reduction in bandwidth. 15.6 mm is equal to half the wavelength of the electromagnetic wave generated by the differential gap antenna. Initially, the direction of the electromagnetic field generated by the differential gap antenna is the same as the direction of the magnetic field in the DRA. Therefore, the bandwidth of the differential gap antenna can reach 20.5-27 GHz, which is 85% higher than the bandwidth of the conventional feeding structure.

[0030] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept, but these improvements all fall within the protection scope of the present invention.

Claims

1. A differential gap antenna, characterized in that, include: Dielectric substrate; A metal plate is attached to the dielectric substrate. The metal plate has a power feeding structure and a plurality of ground holes. The power feeding structure includes a first power feeding slot, a second power feeding slot, and a differential structure. The differential structure is disposed at the connection between the first power feeding slot and the second power feeding slot. The plurality of ground holes are respectively placed around the differential structure. The first power feeding slot and the second power feeding slot have the same structure. The first power feeding slot and the second power feeding slot are symmetrical about the differential structure. A dielectric resonator is mounted on the metal plate, and the dielectric resonator is pressed onto the feed structure. The first power supply gap and the second power supply gap both include a |-shaped gap, a C-shaped gap and an L-shaped gap. The |-shaped gap is connected to the first end of the C-shaped gap and extends in a first direction. The L-shaped gap is connected to the second end of the C-shaped gap and extends in a first direction. The differential structure includes a U-shaped slot, the two ends of which are connected to the L-shaped slots of the first power supply slot and the second power supply slot, respectively, and the U-shaped slot extends in a first direction.

2. The differential gap antenna according to claim 1, characterized in that, The length of the first end of the C-shaped slit is greater than the length of the second end of the C-shaped slit.

3. The differential gap antenna according to claim 1, characterized in that, The distance between the two ends of the C-shaped slit is 15.6 mm.

4. The differential gap antenna according to claim 1, characterized in that, The differential structure includes a signal aperture, and the U-shaped slit partially covers the opening of the signal aperture.

5. The differential gap antenna according to claim 4, characterized in that, The distance between the two ends of the U-shaped gap is 0.6 mm.

6. The differential gap antenna according to claim 4, characterized in that, The ground hole is provided in three positions, which are respectively located at the three points of the closed end of the U-shaped gap.

7. The differential gap antenna according to claim 1, characterized in that, The distance between the I-shaped gap of the first power supply gap and the I-shaped gap of the second power supply gap is 4mm.

8. The differential gap antenna according to claim 1, characterized in that, All gaps in the power supply structure have a width of 0.3 mm.

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