WO2018133428A1

WO2018133428A1 - Wideband dual-polarized aperture-coupled feed antenna

Info

Publication number: WO2018133428A1
Application number: PCT/CN2017/100177
Authority: WO
Inventors: 曲美君; 邓力; 李书芳; 张贯京; 葛新科; 高伟明; 张红治
Original assignee: 深圳市景程信息科技有限公司
Priority date: 2017-01-22
Filing date: 2017-09-01
Publication date: 2018-07-26
Also published as: CN206602180U

Abstract

Disclosed is a wideband dual-polarized aperture-coupled feed antenna. The antenna comprises: a radiation layer, an aperture coupling layer and a feeding layer, wherein the radiation layer is fitted above the aperture coupling layer, the feeding layer is fitted under the aperture coupling layer; a circular radiation patch is arranged on an upper surface of the radiation layer, an annular coupling patch is arranged on an upper surface of the aperture coupling layer, thus widening antenna bandwidth; a copper-clad metal face is arranged on an upper surface of the feeding layer, wherein a first feeding gap, a second feeding gap and an isolation gap are etched on the copper-clad metal face; and a first feeder and a second feeder perpendicular to each other are arranged on an lower surface of the feeding layer, wherein a first port is arranged at a joint of the first feeder and a long edge of the feeding layer, and a second port is arranged at a joint of the second feeder and a wide edge of the feeding layer, thus realizing the dual-polarization property of the antenna. In the antenna in the present utility model, the isolation degree of the antenna is improved by means of arranging the isolation gap with an inclination angle of 45° on the copper-clad metal face of the feeding layer.

Description

Wideband dual polarization aperture coupled feed antenna

[0001] The present invention relates to the field of radio frequency microwave communication technologies, and in particular, to a broadband dual-polarization aperture coupled feed antenna.

Background technique

[0002] In recent years, with the shortage of spectrum resources and the increasing requirements of communication capacity, dual-polarization and high-bandwidth antennas have become the research hotspots. Improving antenna isolation has become a common problem in many radio system antennas. . For the existing multi-layer feed antenna, although the two orthogonally placed feed structures can achieve dual polarization performance and high isolation, the antenna itself is large in size, which is not conducive to the integration of the RF front end.

technical problem

[0003] The main object of the present invention is to provide a broadband dual-polarized aperture coupled feed antenna, which aims to solve the technical problem that the existing multilayer feed antenna has a large size and is not conducive to the integration of the RF front end.

Problem solution

Technical solution

[0004] In order to achieve the above object, the present invention provides a broadband dual-polarization aperture coupled feed antenna, including a radiation layer, an aperture coupling layer, and a feed layer, wherein the radiation layer is fitted to the aperture coupling layer. Above, the feed layer is fitted below the aperture coupling layer, wherein:

[0005] The upper surface of the radiation layer is provided with a circular radiation patch, and the upper surface of the aperture coupling layer is provided with a ring-shaped coupling patch;

[0006] The upper surface of the feeding layer is coated with a copper-clad metal surface, the copper-clad metal surface is etched with a first feeding slit, a second feeding slit and an isolation slit, the first feeding slit and the first The two feed gaps are etched in the vertical alignment direction on the upper surface of the feed layer, and the isolation slits are etched on the diagonal of the upper surface of the feed layer in an arrangement direction with an inclination angle of 45°;

[0007] The lower surface of the feeding layer is provided with a first feeding line and a second feeding line. The first feeding line and the second feeding line are vertically disposed on the lower surface of the feeding layer, and the first feeding line is connected with the long side of the feeding layer. There is a first port, A second port is disposed at a junction between the second feed line and the wide side of the feed layer.

[0008] Preferably, the radiation layer and the aperture coupling layer are fitted by a plastic screw or a nylon column, and the feeding layer and the aperture coupling layer are fitted by a plastic screw or a nylon column.

[0009] Preferably, the radiation layer, the aperture coupling layer and the feeding layer are all made of a rectangular dielectric plate made of FR4 material having a dielectric constant of 4.4, wherein the radiation layer, the aperture coupling layer and the feeding layer are The length and the width are both 15.5 mm, the thickness of the radiation layer and the aperture coupling layer are both 1.6 mm, and the thickness of the feeding layer is 0.

8mm.

[0010] Preferably, the circular radiation patch is made of a circular metal copper sheet having a radius of 5.1 mm.

[0011] Preferably, the annular coupling patch is made of a ring-shaped metal copper piece having an outer circle radius of 7.5 mm and an inner circle radius of 4.5 mm.

[0012] Preferably, the first feeding slot and the second feeding slot are hollow rectangular slits, and the hollow rectangular slit has a length of 5.8 mm and a width of 2.8 mm.

[0013] Preferably, the distance between the first feeding slot and the long side and the wide side of the feeding layer is 1.35 mm, and the distance between the long side and the wide side of the feeding layer is It is 1.35mm.

[0014] Preferably, one end of the first feeding line is disposed at a distance of 1.5 mm from the central axis of the long side of the feeding layer, and one end of the second feeding line is disposed at a distance of 1.5 mm of the central axis of the wide side of the feeding layer. At the office.

[0015] Preferably, the isolation slit is a hollow strip slit, and the hollow strip slit has a length of 19.8 mm and a width of 0.4 mm.

Advantageous effects of the invention

Beneficial effect

Compared with the prior art, the broadband dual-polarized aperture coupled feed antenna of the present invention adopts the above technical solution, and achieves the following technical effects: The broadband dual-polarized aperture coupled feed antenna of the present invention The structure is simple and compact, and the bandwidth of the antenna is broadened by providing a circular radiation patch on the upper surface of the radiation layer; a long isolation slit with an inclination angle of 45° is etched on the upper surface of the feeding layer, thereby improving the two ports of the antenna. The isolation between. The simulation results show that the antenna of the present invention can achieve dual polarization in a wide working frequency band (9.6 GHz - 22.4 GHz), and the antenna isolation is better than 15 dB in the entire working frequency band. Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a preferred embodiment of a broadband dual-polarized aperture coupled feed antenna of the present invention; [0018] FIG. 2 is a feed layer of the broadband dual-polarized aperture coupled feed antenna of the present invention; Schematic diagram of the distribution of two feeders on the lower surface;

3 is a schematic diagram showing simulation results of a reflection coefficient of a broadband dual-polarized aperture coupled feed antenna of the present invention;

4 is a schematic diagram showing the simulation results of the isolation between two ports of a broadband dual polarization aperture coupled feed antenna of the present invention.

[0021] The objects, features, and advantages of the present invention will be described in conjunction with the embodiments of the embodiments.

BEST MODE FOR CARRYING OUT THE INVENTION

[0022] In order to further illustrate the technical means and functions of the present invention in order to achieve the above objects, the specific embodiments, structures, features and functions of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

1 is a schematic structural view of a preferred embodiment of a broadband dual polarization aperture coupled feed antenna of the present invention. In this embodiment, the broadband dual polarization aperture coupled feed antenna includes a radiation layer 1, an aperture coupling layer 2, and a feed layer 3. The radiation layer 1 is fitted above the aperture coupling layer 2, which is fitted below the aperture coupling layer 2. The radiation layer 1 and the aperture coupling layer are fitted by a plastic screw or a nylon column, and the feeding layer 3 and the aperture coupling layer 2 are fitted by a plastic screw or a nylon column. The radiation layer 1, the aperture coupling layer 2, and the feed layer 3 are each a rectangular dielectric plate made of FR4 material having a dielectric constant of 4.4. The length 1 and the width w of the radiation layer 1, the aperture coupling layer 2, and the feed layer 3 are each preferably 15.5 mm, and the thickness h of the radiation layer 1 and the thickness h 2 of the aperture coupling layer ₂ are both 1.6 mm. The thickness h _{3 of the} feed layer 3 is preferably 0.8 mm.

[0024] The upper surface of the radiation layer 1 is provided with a circular radiation patch 10, and the circular radiation patch 10 is a circular patch made of a metal copper sheet, and the radius r ₃ is preferably 5.1 mm. The utility model adopts the upper surface of the radiation layer 1 The circular radiation patch 10 is provided to widen the bandwidth of the antenna.

[0025] The upper surface of the aperture-coupled layer 2 is provided with an annular coupling patch 20, the patch 20 using an annular coupling ring made of a metal copper patch, which outer radius _{Γ ι} preferably 7.5mm, The radius r _{2 of the} inner circle is preferably 4.5 mm. The utility model adopts the annular coupling patch 20 disposed on the upper surface of the aperture coupling layer 2 to realize the aperture coupling of electromagnetic waves and further widen the bandwidth of the antenna.

[0026] The upper surface of the feeding layer 3 is provided with a copper-clad metal surface 30 as a ground plane, and the copper-clad metal surface 30 is etched with a first feeding slit 31, a second feeding slit 32, and an isolation slit. 33. The first feeding slot 3 1 and the second feeding slot 32 are hollow rectangular slits, and the length 1 is 5.8! ^^ The width w ₁ is 2.8 mm, and no metal copper is coated in the two hollow rectangles. Feeding a first long slot 31 from the side of the feed layer 3, the distance S _h are broadside 1.35mm, the second feed slot 32 from the feed side of the long layer 3, the distance S _h are broadside 1.35 Mm. The first feeding slit 31 and the second feeding slit 32 are etched on the upper surface of the feeding layer 3 in a vertical alignment direction. The isolation gap 33 is a slot elongated hollow metallic copper not coated, the length of the hollow elongated slits ₁₃ 19.81 ^^ width W ₃ is 0.4mm. The isolation slit 33 is etched on the diagonal of the upper surface of the feed layer 3. In the embodiment, the isolation slit 33 has a tilt angle of 45° and a length of about (g is an effective wavelength of 9 GHz). ) is etched on the diagonal of the upper surface of the feed layer 3. Since the upper surface of the feeding layer 3 is provided with the isolation slit 33, the electromagnetic waves between the two ports PP _{2 of the} antenna can be mutually interfered, thereby improving the antenna isolation.

As shown in FIG. 2, FIG. 2 is a schematic diagram of two feeder distributions on the lower surface of the feed layer in the broadband dual polarization aperture coupled feed antenna of the present invention. In this embodiment, the lower surface of the feed layer 3 is provided with two feed lines, including a first feed line 34 and a second feed line 35. One end of the first feed line 34 is disposed on the central axis of the long side of the feed layer 3. The distance is 1.5 mm (S = 1.5 mm); one end of the second feed line 35 is disposed at a distance of 1.5 mm from the central axis of the wide side of the feed layer 3. A first port P ₁ is disposed at a junction between the first feed line 34 and a long side of the feed layer 3; a second port P ₂ is disposed at a junction between the second feed line 35 and the wide side of the feed layer 3. The lengths I f of the first feed line 34 and the second feed line 35 are both 4.15 mm, and the width w _f is 1.06 mm. The first feed line 34 and the second feed line 35 are disposed perpendicularly on the lower surface of the feed layer 3 such that the polarization modes of the first port P1 and the second port P2 are perpendicular to each other, and thus the antenna of the present invention has dual polarization characteristics. .

[0028] Referring to FIG. 1 and FIG. 2 together, the antenna according to the embodiment can transmit a signal generated by an external signal source to an external environment (for example, the outside atmosphere) through a circular radiation patch 10 in the form of electromagnetic waves. , and also The electromagnetic wave in the external environment can be received by the circular radiation patch 10 to achieve the dual polarization characteristic of the antenna. Specifically, the electromagnetic wave is transmitted by the antenna, and the first port 1 and the second port P ₂ are excited by an external signal source generating signal. First end and second port P ₂

The signals are respectively fed to the first feed line 34 and the second feed line 35, and the feed layer 3 converts the signal into electromagnetic waves and transmits the electromagnetic waves to the aperture coupling layer 2 through the first feed gap 31 and the second feed slit 32. The annular coupling patch 20 of the upper surface. The annular coupling patch 20 couples electromagnetic waves to a circular radiation patch 10 on the upper surface of the radiation layer 1, which emits electromagnetic waves into the external environment. Receiving electromagnetic waves at the antenna, the circular radiation patch 10 can receive electromagnetic waves from an external environment and transmit the electromagnetic waves to the annular coupling patch 20 on the upper surface of the aperture coupling layer 2; the annular coupling patch 20 passes The first feed slot 31 and the second feed slot 32 transmit electromagnetic waves to the feed layer 3, the feed layer 3 converts electromagnetic waves into two orthogonal signals, and the first feed line 34 and the second feed line 35 will be two paths quadrature signal through the first port P, of the second output port P _2.

As shown in FIG. 3, FIG. 3 is a schematic diagram of simulation results of a reflection coefficient of a broadband dual-polarized aperture coupled feed antenna of the present invention. In the present embodiment, the reflection coefficient 8 indicates the simulation result input from the signal first port P1 and reflected from the first port P, and the reflection coefficient S ₂₂ indicates that the signal is input from the second port P ₂ and from the second port P. ₂

The simulated result reflected. As can be seen from Figure 3, the antenna operates from 9.6 GHz to 22.4 GHz and the relative bandwidth of the antenna is 80%.

[0030] As shown in FIG. 4, FIG. 4 is a schematic diagram showing simulation results of isolation between two ports of a broadband dual-polarized aperture coupled feed antenna of the present invention. In the present embodiment, S ₂₁ represents the isolation between the second port P ₂ and the first port 1 \ , as can be seen from FIG. 4 , S ₂₁

The simulation results show that the antenna has an isolation of less than -1 5 dB over the entire operating frequency band (9.6 GHz - 22.4 GHz).

[0031] The layout design of the broadband dual-polarized aperture coupled feed antenna of the present invention, the HFSS electromagnetic simulation software can obtain the 3D radiation pattern of the antenna at a frequency of 13 GHz, the second port P ₂ and the first port The radiation maximum is on the X-axis and the Y-axis, respectively, that is, the polarization of the two ports is vertical, so the antenna of the present invention has dual polarization characteristics. In addition, the broadband dual-polarized aperture coupled feed antenna of the present invention has a simple and compact structure, and a circular shape is provided on the upper surface of the radiation layer 1. The radiation patch broadens the bandwidth of the antenna; an isolation slit with an inclination angle of 45° is etched on the upper surface of the feed layer 3, thereby improving the isolation of the two ports of the antenna. The simulation results show that the antenna of the present invention can achieve dual polarization in a wide working frequency band (9.6 GHz - 22.4 GHz), and the antenna isolation is better than 15 dB in the entire working frequency band.

The above is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention, and the equivalent structure or equivalent function transformation made by the specification and the drawings of the present invention, or directly or indirectly In other related technical fields, the same is included in the scope of patent protection of the present invention.

Industrial applicability

Compared with the prior art, the broadband dual-polarized aperture coupled feed antenna of the present invention adopts the above technical solution, and achieves the following technical effects: The broadband dual-polarized aperture coupled feed antenna of the present invention The structure is simple and compact, and the bandwidth of the antenna is broadened by providing a circular radiation patch on the upper surface of the radiation layer; a long isolation slit with an inclination angle of 45° is etched on the upper surface of the feeding layer, thereby improving the two ports of the antenna. The isolation between. The simulation results show that the antenna of the present invention can achieve dual polarization in a wide operating frequency band (9.6 GHz - 22.4 GHz), and the antenna isolation is better than 15 dB in the entire working frequency band.

Claims

Claim

A broadband dual-polarized aperture coupled feed antenna includes a radiation layer, an aperture coupling layer, and a feed layer, the radiation layer is fitted over the aperture coupling layer, and the feed layer is fitted in the aperture The lower surface of the coupling layer is characterized in that: the upper surface of the radiation layer is provided with a circular radiation patch, and the upper surface of the aperture coupling layer is provided with an annular coupling patch; the upper surface of the feeding layer is coated with a copper metal surface, the copper-clad metal surface is etched with a first feed slit, a second feed slit, and an isolation slit, and the first feed slit and the second feed slit are etched in the vertical alignment direction at the feed The upper surface of the electrical layer, the isolation slit having an inclination angle of 45. The alignment direction is etched on a diagonal of the upper surface of the feed layer; the lower surface of the feed layer is provided with a first feed line and a second feed line, and the first feed line and the second feed line are vertically disposed on the feed layer The lower surface, the first port is disposed at a junction between the first feed line and the long side of the feed layer, and the second port is disposed at a junction between the second feed line and the wide side of the feed layer.

The broadband dual-polarized aperture coupled feed antenna according to claim 1, wherein the radiation layer and the aperture coupling layer are fitted by a plastic screw or a nylon column, and the feed layer and the aperture coupling layer are Fit with plastic screws or nylon columns.

The broadband dual-polarization aperture-coupled feed antenna according to claim 1, wherein the radiation layer, the aperture coupling layer and the feed layer are rectangular dielectric plates, wherein the radiation layer

The length and width of the aperture coupling layer and the feeding layer are both 15.5 mm, the thickness of the radiation layer and the aperture coupling layer are both 1.6 mm, and the thickness of the feeding layer is 0.8 mm.

The broadband dual-polarization aperture-coupled feed antenna according to claim 1, wherein the circular radiation patch is a circular patch made of a metal copper sheet, and the radius of the circular radiation patch is 5.1. Mm.

The broadband dual-polarized aperture coupled feed antenna according to claim 1, wherein the annular coupling patch is a ring-shaped patch made of a metal copper sheet, and the outer circle radius of the annular coupling patch is 7.5 mm. The inner circle has a radius of 4.5mm.

The broadband dual-polarization aperture-coupled feed antenna according to claim 1, wherein the first feed gap and the second feed gap are hollow rectangular slits, and the length of the hollow rectangular slit is 5.8 mm The width is 2.8mm. The broadband dual-polarized aperture coupled feed antenna according to claim 6, wherein the distance between the first feeding slot and the long side and the wide side of the feeding layer is 1.35. Mm, the distance between the second feed gap and the long side and the wide side of the feed layer is 1.35 mm

The broadband dual-polarized aperture coupled feed antenna according to claim 6, wherein one end of the first feed line is disposed at a distance of 1.5 mm from a central axis of a long side of the feed layer. One end of the second feed line is disposed at a distance of 1.5 mm from the central axis of the broad side of the feed layer.

[Claim 9] The broadband dual-polarized aperture coupled feed antenna according to claim 1, wherein the isolation slit is a hollow strip slit, and the length of the hollow strip slit is 19.8 mm and the width is 0.4. Mm.