Wide-beam dielectric resonator antenna

Abstract

The invention discloses a wide-beam dielectric resonator antenna, which is characterized in that a high-dielectric-constant dielectric circular ring with a circular hole and a layer of metal circular ring are loaded above a high-dielectric-constant dielectric block structure, so that a TM11 mode of a dielectric resonator is coupled with a fundamental mode of a metal circular ring structure, and therefore, the wave beam width of the dielectric resonator antenna is expanded, and the dielectric resonator antenna has a wide wave beam range. And the purposes of small size and simple structure are achieved.

Description

Technical Field

[0001] The invention relates to a microwave communication device, in particular to a wide-beam dielectric resonator antenna. Background Art

[0002] A wide-beam antenna is an antenna that can receive and send signals over a wide range. It has the characteristics of a wide radiation range, strong anti-interference, and support for multi-band operation. These characteristics can be well applied in satellite communications and unmanned driving. On the other hand, dielectric resonator antennas have the advantages of strong anti-interference and wide applicability due to the absence of conductor loss in dielectric materials. Dielectric resonator antennas are also small in size and high in efficiency. Therefore, the wide-beam dielectric resonator antenna achieved by integrating a wide-beam antenna with a dielectric resonator antenna has certain research value.

[0003] Some existing wide-beam dielectric resonator antennas widen the beam width by fusing multiple dielectric resonator modes; others widen the beam width by using high dielectric constants and reducing ground dimensions. Some wide-beam circularly polarized microstrip dielectric antennas are designed by adjusting the substrate size to increase the vertical radiation beam width. However, the currently reported wide-beam dielectric resonator antennas have the problems of large size, strict requirements on ground dimensions, and may be difficult to apply in actual environments. Summary of the invention

[0004] Purpose of the invention: In view of the above-mentioned prior art, a wide-beam dielectric resonator antenna is proposed, which expands the beam width of the dielectric resonator antenna while achieving the purpose of small size and simple structure.

[0005] Technical solution: A wide beam dielectric resonator antenna, comprising a top metal ring, a high dielectric constant dielectric ring with a circular hole, a top high dielectric constant dielectric block structure, an upper low dielectric constant substrate layer, an intermediate metal layer structure, a lower low dielectric constant substrate layer, and a bottom feeder structure arranged from top to bottom; A circle of circular holes is uniformly and tightly loaded on the high dielectric constant dielectric ring along the circumference; the radius of the top metal ring is consistent with the radius of the high dielectric constant dielectric ring; a rectangular groove is etched at the central position of the intermediate metal layer structure; the bottom feeder structure is vertically arranged with the rectangular groove and faces the middle of the rectangular groove; the signal is fed in through the bottom feeder structure, and the signal is coupled to the top high dielectric constant dielectric block structure through the rectangular groove and stimulates the TM of the dielectric block structure 11 mode, while exciting the fundamental mode of the top metal ring.

[0006] Furthermore, the radius of the high dielectric constant medium ring is 0.14λ0~0.17λ0, the height is 0.015λ0~0.018λ0, and the radius of the circular hole loaded on the high dielectric constant medium ring is 0.006λ0~0.007λ0; Furthermore, the length and width of the top high dielectric constant dielectric block structure are consistent, both of which are 0.32λ0~0.35λ0.

[0007] Furthermore, the length of the rectangular groove is between 0.12λ0 and 0.15λ0, and the width is between 0.03λ0 and 0.04λ0.

[0008] Beneficial effect: The existing wide-beam dielectric resonator antenna has the disadvantages of high profile, large size, high configuration, etc., which are not conducive to the miniaturization development of wireless communication systems. In view of the disadvantages of the prior art, the present invention provides a wide-beam dielectric resonator antenna, which loads a high-dielectric constant dielectric ring with a circular hole and a layer of metal ring on the high-dielectric constant dielectric block structure, so that the TM 11 The mode is coupled with the fundamental mode of the metal ring structure, thereby expanding the beam width of the dielectric resonator antenna while achieving the purpose of small size and simple structure.

[0009] Loading a dielectric ring with a tightly arranged circular hole structure between the metal ring and the high dielectric constant dielectric block structure can not only increase coupling and further expand the beam, but also achieve integrated processing and improve integration. Specifically, loading a dielectric ring with a tightly arranged circular hole structure reduces the coupling loss between the high dielectric constant and the metal ring, thereby increasing the coupling of the modes between the two, which can further expand the beam. The high dielectric constant dielectric block, the high dielectric constant dielectric ring with circular holes, and the metal ring are a whole and can be directly processed as an integrated whole without separate processing, thereby reducing assembly errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a cross-sectional view of the antenna of the present invention; Figure 2 It is a schematic diagram of the top structure of the antenna of the present invention; Figure 3 It is a schematic diagram of the structure of the intermediate metal layer of the antenna of the present invention; Figure 4 It is a schematic diagram of the bottom feeder structure of the antenna of the present invention; Figure 5 is an S parameter and gain curve diagram of the antenna of the embodiment; Figure 6 For example, the antenna is at 4.9 GHz E / H Simulation direction diagram of the surface. Implementation

[0011] The present invention will be further explained below in conjunction with the accompanying drawings.

[0012] like Figures 1 to 4 As shown, a wide beam dielectric resonator antenna has an axially symmetrical structure and is composed of a top metal ring 1, a high dielectric constant dielectric ring 2 with a circular hole, a top high dielectric constant dielectric block structure 3, an upper low dielectric constant substrate layer 4, an intermediate metal layer structure 5, a lower low dielectric constant substrate layer 6, and a bottom feeder structure 7.

[0013] The top metal ring 1 is attached to the high dielectric constant medium ring 2 with circular holes. The high dielectric constant medium ring 2 with circular holes is directly connected to the top high dielectric constant medium block structure 3. A circle of circular holes is evenly and tightly loaded on the high dielectric constant medium ring 2 along the circumference. The high dielectric constant dielectric ring 2 and the top high dielectric constant dielectric block structure 3 are ceramics with a dielectric constant of 10.2; the length and width of the top high dielectric constant dielectric block structure 3 are both 0.32λ0~0.35λ0; the radius of the high dielectric constant dielectric ring 2 is 0.14λ0~0.17λ0, the height is 0.015λ0~0.018λ0, the radius of the circular hole loaded on the high dielectric constant dielectric ring 2 is 0.006λ0~0.007λ0, and the radius of the top metal ring 1 is consistent with the radius of the high dielectric constant dielectric ring 2; a rectangular groove 8 is etched at the central position of the intermediate metal layer structure 5, the length of the rectangular groove 8 is between 0.12λ0~0.15λ0, and the width is between 0.03λ0~0.04λ0, and λ0 is the free space wavelength corresponding to the center frequency.

[0014] The bottom feeder structure 7 is arranged vertically to the rectangular slot 8 and faces the middle of the rectangular slot 8. The signal is fed through the microstrip feeder corresponding to the bottom feeder structure 7, and coupled to the top high dielectric constant medium block structure 3 and the metal ring 1 through the rectangular slot 8, respectively exciting the TM11 mode of the high dielectric constant and the fundamental mode of the metal ring, and the two are superimposed on each other to realize wide beam radiation.

[0015] When the antenna is working, the signal is fed into the microstrip feeder corresponding to the bottom feeder structure 7, and the signal is coupled to the top high dielectric constant dielectric block structure 3 through the rectangular slot 8 and stimulates the TM 11 mode, and can also excite the fundamental mode of the top metal ring 1. 11 The mode can realize a single-beam radiation pattern at the vertex, while the fundamental mode of the top metal ring 1 can produce a dual-beam radiation pattern, and the two are superimposed on each other, thereby expanding the beam width of the dielectric resonator antenna.

[0016] The metal ring-loaded integrated wide-beam dielectric resonator antenna of the present invention has the advantages of small size and simple structure compared with the existing wide-beam dielectric resonator antenna. The following is a design example of the present invention. The antenna structure is as follows: Figures 1 to 4 As shown, in this embodiment, the material of the top metal ring 1 is copper; the dielectric substrate with low dielectric constant has a dielectric constant of 3.55 and a loss angle of 0.0027; the dielectric material with high dielectric constant has a dielectric constant of 10.2 and a loss angle of 0.0023; and a circle of 30 circular holes is evenly and tightly loaded along the circumference of the high dielectric constant dielectric ring 2. The simulation results of the matching and gain response of the antenna are shown in Figure 5 As shown, the 10 dB impedance matching bandwidth of this embodiment is 2.5% (4.86 GHz – 4.97 GHz), and the maximum gain within the working frequency band is 3.49 dBi. Figure 6 is the antenna's E / H-plane simulation radiation pattern, E The 3-dB beamwidth in the E / H plane is 165.3° / 103.4°, and at this frequency, the E / H plane cross-polarization level is -39.8 dB / -28.7 dB The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wide beam dielectric resonator antenna, characterized in that: It comprises a top metal ring (1) arranged from top to bottom, a high dielectric constant dielectric ring (2) with a circular hole, a top high dielectric constant dielectric block structure (3), an upper low dielectric constant substrate layer (4), an intermediate metal layer structure (5), a lower low dielectric constant substrate layer (6), and a bottom feeder structure (7); A circle of circular holes is evenly and tightly loaded along the circumference of the high dielectric constant dielectric ring (2); the radius of the top metal ring (1) is consistent with the radius of the high dielectric constant dielectric ring (2); a rectangular groove (8) is etched at the central position of the intermediate metal layer structure (5); the bottom feeder structure (7) is arranged perpendicular to the rectangular groove (8) and faces the middle of the rectangular groove (8); a signal is fed in through the bottom feeder structure (7), and the signal is coupled to the top high dielectric constant dielectric block structure (3) through the rectangular groove (8) and stimulates the TM of the dielectric block structure. 11 mode, while exciting the fundamental mode of the top metal ring (1).

2. The wide beam dielectric resonator antenna according to claim 1, characterized in that: The radius of the high dielectric constant medium ring (2) is 0.14λ0-0.17λ0, the height is 0.015λ0-0.018λ0, and the radius of the circular hole loaded on the high dielectric constant medium ring (2) is 0.006λ0-0.007λ0.

3. The wide beam dielectric resonator antenna according to claim 2, characterized in that: The length and width of the top layer high dielectric constant dielectric block structure (3) are consistent, both being 0.32λ0-0.35λ0.

4. The wide beam dielectric resonator antenna according to claim 3, characterized in that: The rectangular groove (8) has a length between 0.12λ0 and 0.15λ0, and a width between 0.03λ0 and 0.04λ0.

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