WO2018133427A1

WO2018133427A1 - Aperture coupled feed wideband patch antenna having dual-polarization property

Info

Publication number: WO2018133427A1
Application number: PCT/CN2017/100176
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: CN106898871A

Abstract

Disclosed is an aperture coupled feed wideband patch antenna having a dual-polarization property. 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 for widening antenna bandwidth 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; 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 invention, 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

Wide-band patch antenna with aperture coupling feed with dual polarization performance

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

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 patch antenna, although two orthogonally placed feed structures can achieve dual polarization performance and high isolation, the antenna itself has a large 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 an aperture-coupled-fed broadband patch antenna having dual polarization performance, which aims to solve the problem that the size of the existing multilayer feed patch antenna is large and is not conducive to the integration of the RF front-end. Solution to technical problem

Technical solution

[0004] In order to achieve the above object, the present invention provides an aperture-coupled-fed broadband patch antenna having dual polarization performance, including a radiation layer, an aperture coupling layer, and a feed layer, where the radiation layer is fitted Above the aperture coupling layer, 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, and the copper-clad metal surface is etched with a first feeding slit, a second feeding slit and an isolation slit;

[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. a first port is disposed, and a second port is disposed at a connection between the second feeding line and the wide side of the feeding layer; [0008] The first port and the second port are configured to respectively feed signals generated by an external signal source to the first feed line and the second feed line, and the feed layer is configured to convert the signal into an electromagnetic wave and pass the first feed. The electrical slit and the second feed slit transmit electromagnetic waves to the annular coupling patch on the upper surface of the aperture coupling layer;

The ring-shaped coupling patch is used to couple electromagnetic waves to a circular radiation patch on the upper surface of the radiation layer, and the circular radiation patch will be used to emit electromagnetic waves into the external environment.

[0010] Preferably, the circular radiation patch is further used for receiving electromagnetic waves from an external environment and transmitting the electromagnetic waves to the annular coupling patch on the upper surface of the aperture coupling layer; the annular coupling patch is also used for Electromagnetic waves are transmitted to the feed layer through the first feed slot and the second feed slot; the feed layer is further configured to convert electromagnetic waves into two orthogonal signals, and the first feed line and the second feed line will be two paths The quadrature signal is output through the first port and the second port.

[0011] 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.

[0012] 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 8毫米。 The thickness of the thickness of the feed layer is 0. 8mm.

[0013] Preferably, the circular radiation patch is made of a circular metal copper sheet having a radius of 5.1 mm.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] Preferably, the isolation slit is a hollow strip slit having a length of 19.8 mm and a width of 0.4 mm. [0019] Preferably, the isolation slit is etched on a diagonal line of the upper surface of the feed layer in an arrangement direction with an inclination angle of 45°.

Advantageous effects of the invention

Beneficial effect

[0020] Compared with the prior art, the wide-band patch antenna with the dual-polarization performance of the aperture-coupled feed adopts the above technical solutions, and achieves the following technical effects: The dual-polarization performance of the present invention An aperture-coupled-fed broadband patch antenna having a simple and compact structure, by widening the bandwidth of the antenna by providing a circular radiation patch on the upper surface of the radiation layer; etching an inclination angle on the upper surface of the feed layer The 45° isolation gap improves 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 operating frequency band (9.6 GHz - 22.4 GHz), and the antenna isolation is better than 15 dB over the entire operating frequency band.

Brief description of the drawing

DRAWINGS

1 is a schematic diagram showing the structure of a preferred embodiment of an aperture-coupled feed broadband patch antenna having dual polarization performance according to the present invention;

2 is a schematic diagram showing distribution of two feeder lines on a lower surface of a feeding layer in a broadband patch antenna with dual polarization performance according to the present invention; [0022] FIG.

3 is a schematic diagram showing the simulation result of the reflection coefficient of the aperture-coupled-fed broadband patch antenna with dual polarization performance according to the present invention;

4 is a schematic diagram showing simulation results of isolation between two ports of an aperture-coupled-fed broadband patch antenna having dual polarization performance according to the present invention.

[0025] The objects, features, and advantages of the invention will be <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

BEST MODE FOR CARRYING OUT THE INVENTION

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. Bright. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of a preferred embodiment of a wideband patch antenna with aperture coupling feed having dual polarization performance according to the present invention. In this embodiment, the aperture-coupled-fed broadband patch antenna having dual polarization performance 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.

[0028] 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 invention adopts a circular radiation patch 10 provided on the upper surface of the radiation layer 1, which can widen the bandwidth of the antenna.

[0029] 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 invention 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.

[0030] 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. Due to The upper surface of the feeding layer 3 is provided with an isolation slit 33, which can reduce mutual interference of electromagnetic waves between the two ports PP ₂ of the antenna, thereby improving antenna isolation.

As shown in FIG. 2, FIG. 2 is a schematic diagram showing the distribution of two feeder lines on the lower surface of the feed layer in the broadband patch antenna with dual polarization performance of the dual polarization performance 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 is provided at a connection between the first feed line 34 and the 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 wft 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 P and the second port P ₂ are perpendicular to each other, and thus the antenna of the present invention has dual polarization characteristic.

[0032] 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. It is also possible to receive electromagnetic waves in the external environment through the circular radiation patch 10 to achieve the dual polarization characteristics 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 showing simulation results of reflection coefficients of two ports of an aperture-coupled-fed broadband patch antenna with dual polarization performance according to the present invention. In this embodiment, the reflection coefficient 8 „ indicates the signal from The first port p, the simulation result input and reflected from the first port P; the reflection coefficient S ₂₂ represents the simulation result of the signal input from the second terminal ΠΡ ₂ and reflected from the second port 1 > ₂ . As can be seen from Figure 3, the operating band of the antenna is 9.6 GHz - 22.4 GHz, and the relative bandwidth of the antenna is 80 < 3⁄4.

As shown in FIG. 4, FIG. 4 is a schematic diagram showing simulation results of isolation between two ports of an aperture-coupled-fed broadband patch antenna having dual polarization performance according to the present invention. In this embodiment, S ₂₁ represents the second port! ^ With the first port! ^! The isolation between them, as can be seen from Figure 4, the simulation results of S ₂₁ indicate that the antenna has an isolation of less than -15 dB over the entire operating frequency band (9.6 GHz - 22.4 GHz).

[0035] The layout design of the wide-band patch antenna with dual-polarization performance of the aperture-coupled feed according to the present invention, and the HFSS electromagnetic simulation software can obtain the 3D radiation pattern of the antenna at a frequency of 13 GHz, the second port? With the first port _P _2, respectively, in the maximum radiation X and Y axes, i.e. two ports polarization is vertical, thus the present invention has the dual polarized antenna characteristics. In addition, the present invention has a dual-polarization performance aperture-coupled-fed broadband patch antenna, and the antenna has a simple and compact structure, and a bandwidth of the antenna is broadened by providing a circular radiation patch on the upper surface of the radiation layer 1; An isolation slit having 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 operating frequency band (9.6 GHz - 22.4 GHz), and the antenna isolation is better than 15 dB in the entire operating frequency band.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent function changes made by the description of the present invention and the contents of the drawings, or directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Industrial applicability

Compared with the prior art, the broadband patch antenna with the dual-polarization performance of the aperture coupling feed adopts the above technical solution, and achieves the following technical effects: The dual polarization performance of the present invention An aperture-coupled-fed broadband patch antenna having a simple and compact structure, by widening the bandwidth of the antenna by providing a circular radiation patch on the upper surface of the radiation layer; etching an inclination angle on the upper surface of the feed layer The 45° isolation gap improves 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 operating frequency band (9.6 GHz - 22.4 GHz), and the antenna isolation is better than 15 dB over the entire operating frequency band.

Claims

Claim

[Attach 1] An aperture-coupled-fed broadband patch antenna having dual polarization performance, comprising a radiation layer, an aperture coupling layer, and a feed layer, the radiation layer being fitted over the aperture coupling layer The feeding layer is fitted under the aperture coupling layer, wherein: 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 feed layer is coated with a copper-clad metal surface, the copper-clad metal surface is etched with a first feed gap, a second feed gap, and an isolation slit; the lower surface of the feed layer is provided with a first feed line And a second feed line, the first feed line and the second feed line are disposed perpendicularly on the lower surface of the feed layer, and the first port, the second feed line and the feed layer are disposed at a junction between the first feed line and the long side of the feed layer a second port is disposed at a connection between the wide sides; the first port and the second port are configured to respectively feed signals generated by an external signal source to the first feed line and the second feed line, and the feed layer is used to The signal is converted into electromagnetic waves and An annular coupling patch that transmits electromagnetic waves to the upper surface of the aperture coupling layer through the first feed slot and the second feed slot; the annular coupling patch is used to couple electromagnetic waves to the circular radiation sticker on the upper surface of the radiation layer The circular radiating patch will be used to emit electromagnetic waves into the external environment.

[Claim 2] The aperture-coupled feed broadband patch antenna having dual polarization performance according to claim

The circular radiation patch is further configured to receive electromagnetic waves from an external environment and transmit the electromagnetic waves to the annular coupling patch on the upper surface of the aperture coupling layer; the annular coupling patch is also used to pass The first feed slot and the second feed slot transmit electromagnetic waves to the feed layer; the feed layer is further configured to convert electromagnetic waves into two orthogonal signals, and the first feed line and the second feed line will be two paths positive The signal is output through the first port and the second port.

[Claim 3] The aperture-coupled feed broadband patch antenna having dual polarization performance according to claim

And characterized in that: 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.

[Attachment 4] The aperture-coupled feed broadband patch antenna having dual polarization performance according to claim

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

The aperture-coupled-fed broadband patch antenna with dual polarization capability according to claim 1, wherein: the circular radiation patch is a circular patch made of a metal copper sheet, and the circular radiation The radius of the patch is 5. lmm; the annular coupling patch is a ring-shaped patch made of a metal copper sheet having an outer circle radius of 7.5 mm and an inner circle radius of 4.5 mm.

Multi-polar patch antenna with aperture coupling feed with dual polarization performance according to claim

The feature that the first feed slot and the second feed slot are hollow rectangular slits

The hollow rectangular slit has a length of 5.8 mm and a width of 2.8 mm.

The aperture-coupled-fed broadband patch 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 1.35mm, the distance between the second feed gap and the long side and the wide side of the feed layer is 1.35 mm.

The aperture-coupled-fed broadband patch 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 wide side of the feed layer.

The aperture-coupled-fed broadband patch 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 0.4mm.

The aperture-coupled-fed broadband patch antenna with dual polarization performance according to claim 9, wherein the isolation slit is etched on the upper surface of the feed layer in an arrangement direction with an inclination angle of 45°. Diagonal.