CN109309281B

CN109309281B - Microstrip vertical loop antenna

Info

Publication number: CN109309281B
Application number: CN201810984673.3A
Authority: CN
Inventors: 张淑宁; 范利光; 范聿杰; 范婉华; 刘倩云; 王伶俐; 邢姣; 蒋旭峰; 陈魁宇; 徐焕昊
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2018-08-28
Filing date: 2018-08-28
Publication date: 2021-01-15
Anticipated expiration: 2038-08-28
Also published as: CN109309281A

Abstract

The invention discloses a micro-strip vertical ring antenna, which comprises a rectangular medium substrate, an antenna patch layer attached to the upper surface of the medium substrate and a metal grounding layer attached to the lower surface of the medium substrate, wherein the antenna patch layer comprises a radiation patch and a micro-strip feeder line; the metal grounding layer does not completely cover the dielectric substrate, the width of the metal grounding layer is the same as that of the dielectric substrate, and the length of the metal grounding layer is equal to that of the microstrip feeder; the radiation patch is in a heptagon shape like an arrow feather, is in an axisymmetric structure, and the symmetry axis is superposed with the central line of the microstrip feeder line. The microstrip vertical ring antenna of the invention has funnel-shaped antenna beam path and can be used as a missile-borne antenna.

Description

Microstrip vertical loop antenna

Technical Field

The invention belongs to the technical field of microwave antennas, and particularly relates to a microstrip vertical loop antenna, wherein antenna beams can meet the requirement of missile-borne antenna beam pointing and the bandwidth is wide enough.

Background

In the missile-borne antenna for the ground, because the missile-borne antenna has a funnel-shaped beam requirement for an antenna beam, the missile-borne antenna is required to be conformal on a missile body, so that the design of the missile-borne antenna is complicated.

The microstrip antenna is formed by attaching a metal thin layer as a grounding plate on one surface of a thin dielectric substrate, manufacturing a metal patch with a certain shape on the other surface by using methods such as photoetching and corrosion, and feeding the patch by using a microstrip line or a coaxial probe. The patch is a long and thin strip, and is a microstrip oscillator antenna, and when the patch is an area unit, is a microstrip antenna. The microstrip antenna has the advantages of miniaturization, easy integration, good directivity and the like, so the microstrip antenna has wide application prospect.

Disclosure of Invention

The invention aims to provide a microstrip vertical loop antenna, which meets the beam requirement of a missile-borne antenna through a single antenna.

The technical solution for realizing the purpose of the invention is as follows: a microstrip vertical loop antenna comprises a rectangular medium substrate, an antenna patch layer attached to the upper surface of the medium substrate and a metal grounding layer attached to the lower surface of the medium substrate, wherein the antenna patch layer comprises a radiation patch and a microstrip feeder line, and the radiation patch is connected with the microstrip feeder line; the metal grounding layer does not completely cover the medium substrate, the width of the metal grounding layer is the same as that of the medium substrate, and the length of the metal grounding layer is equal to that of the microstrip feeder line.

Compared with the prior art, the invention has the following remarkable advantages: (1) the microstrip vertical ring antenna has the advantages of simple design and manufacture, small volume and low cost on the premise of meeting the design requirement of the missile-borne antenna; (2) the microstrip vertical ring antenna of the invention has funnel-shaped antenna beam path and can be used as a missile-borne antenna.

Drawings

Fig. 1 is a schematic structural diagram of a microstrip vertical loop antenna according to the present invention.

Fig. 2 is a schematic view of the patch of fig. 1.

Fig. 3 is a graph of S11 at the input of the microstrip vertical loop antenna shown in fig. 1.

Fig. 4 is a radiation pattern of the pitch side of the microstrip collar antenna shown in fig. 1.

Fig. 5 is a radiation pattern of the azimuth plane of the microstrip vertical loop antenna shown in fig. 1.

Fig. 6 is a standing wave ratio plot for the microstrip vertical loop antenna shown in fig. 1.

Detailed Description

With reference to fig. 1, a microstrip vertical ring antenna includes a rectangular dielectric substrate 1, an antenna patch layer 2 attached to the upper surface of the dielectric substrate 1, and a metal ground layer 3 attached to the lower surface of the dielectric substrate 1, where the antenna patch layer 2 includes a radiation patch 21 and a microstrip feeder 22, and the radiation patch 21 is connected to the microstrip feeder 22; the metal grounding layer 3 does not completely cover the dielectric substrate, the width of the metal grounding layer is the same as that of the dielectric substrate, and the length of the metal grounding layer is equal to that of the microstrip feeder 22.

The radiation patch 21 is an arrow-feather-shaped heptagon, is in an axisymmetric structure, and the symmetry axis is superposed with the central line of the microstrip feeder 22.

With reference to fig. 2, the microstrip feed line 22 has a length of 3mm and a width of 0.6 mm.

The radiation patch 21 comprises a first side to a seventh side which are sequentially connected, wherein the first side is superposed with the narrow side of the radiation patch 21, namely the first side is 0.6 mm; the second side and the seventh side are symmetrical, the projection length in the central line direction of the microstrip feed line 22 is 9mm, and the projection length in the extension line direction of the first side is 2.7 mm; the third side and the sixth side are symmetrical, the length of the third side and the sixth side is 9mm, and the third side and the sixth side are parallel to the central line direction of the microstrip feeder line 22; the fourth side and the fifth side are symmetrical, and the projection length in the direction of the central line of the microstrip feed line 22 is 9 mm.

The dielectric substrate 1 is 25mm long, 12mm wide, 1mm thick and 2.52 in relative dielectric constant.

Examples

As shown in fig. 1 and 2, a microstrip vertical ring antenna includes a rectangular dielectric substrate 1, an antenna patch layer 2 attached to the upper surface of the dielectric substrate 1, and a metal ground layer 3 attached to the lower surface of the dielectric substrate 1, where the antenna patch layer 2 includes a radiation patch 21 and a microstrip feeder 22; the radiating patch 21 is connected to a microstrip feed 22.

Referring to fig. 1, part 1 in the figure is a dielectric substrate of an antenna, which has a thickness of 1mm and a relative dielectric constant of 2.52; part 2 in the figure is an antenna patch layer; part 3 in the figure is a metal ground layer.

Referring to fig. 2, the length L1 of the microstrip feed line 22 is 3mm, the width W1 is 0.6mm, the width of the metal ground layer is equal to that of the dielectric substrate, and the length of the metal ground layer is equal to that of the microstrip feed line 22; the radiation patch 21 is a heptagon with arrow feather shape, L2 is 9mm, W2 is 2.7mm, and L3 is 9 mm; the media substrate dimensions were 25mm long L4 and 12mm wide W3.

The result of fig. 3 is obtained through simulation, and it can be seen that the center frequency of the antenna is 8.4GHz, the bandwidth is 1.83GHz, and the return loss is-54 dB; as can be seen from fig. 4 and 5, the antenna has front-side radiation characteristics, and the beam direction is 28-85 degrees, so that the requirements of the missile-borne antenna on the beam shape are met; the result of fig. 6 is obtained by simulation, and it can be seen that the bandwidth of the standing wave ratio of the antenna is 1.95, which is less than 2.

Claims

1. A microstrip vertical ring antenna is characterized by comprising a rectangular medium substrate (1), an antenna patch layer (2) attached to the upper surface of the medium substrate (1) and a metal grounding layer (3) attached to the lower surface of the medium substrate (1), wherein the antenna patch layer (2) comprises a radiation patch (21) and a microstrip feeder line (22), and the radiation patch (21) is connected with the microstrip feeder line (22); the metal grounding layer (3) does not completely cover the dielectric substrate, the width of the metal grounding layer is the same as that of the dielectric substrate, and the length of the metal grounding layer is equal to that of the microstrip feeder line (22); the radiation patch (21) is an arrow-feather-shaped heptagon and has an axisymmetric structure, and the symmetric axis is superposed with the central line of the microstrip feeder line (22); the length of the microstrip feeder line (22) is 3mm, and the width of the microstrip feeder line is 0.6 mm; the radiation patch (21) comprises a first side to a seventh side which are sequentially connected, wherein the first side is superposed with the narrow side of the radiation patch (21), namely the first side is 0.6 mm; the second side and the seventh side are symmetrical, the projection length in the central line direction of the microstrip feed line (22) is 9mm, and the projection length in the extension line direction of the first side is 2.7 mm; the third side and the sixth side are symmetrical, the length of the third side and the sixth side is 9mm, and the third side and the sixth side are parallel to the central line direction of the microstrip feeder line (22); the fourth side and the fifth side are symmetrical, and the projection length in the central line direction of the microstrip feed line (22) is 9 mm.

2. The microstrip vertical loop antenna according to claim 1, wherein the dielectric substrate (1) is 25mm long and 12mm wide.

3. The microstrip vertical loop antenna according to claim 2, characterized in that the dielectric substrate (1) has a thickness of 1 mm.

4. The microstrip vertical ring antenna according to claim 2 or 3, characterised in that the relative dielectric constant of the dielectric substrate (1) is 2.52.