CN109742545A

CN109742545A - A dual-polarized antenna with a planar monopole and half-slot structure

Info

Publication number: CN109742545A
Application number: CN201910083076.8A
Authority: CN
Inventors: 黄晓东; 谭小媛; 金秀华
Original assignee: Nanjing Post and Telecommunication University
Current assignee: Nanjing Post and Telecommunication University
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2019-05-10
Anticipated expiration: 2039-01-28
Also published as: CN109742545B

Abstract

The invention discloses the dual polarized antennas of a kind of planar monopole and half slot structure, and monopole radiating doublet is respectively set by the upper and lower surface in medium substrate and plane single pole sub antenna unit is collectively formed in metal floor；Half slot antenna unit is formed by opening up half slot on metal floor；And the feed port being arranged in medium substrate by metallic connection parts and two forms feed structure unit to be electrically connected to monopole radiating doublet and metal floor；To by different feeding modes, realize two kinds of different line polarization waves in same frequency using the characteristic of both antenna element polarization orthogonals.In addition, plane single pole sub antenna unit and half slot antenna unit all have low section, light-weight, easy to process feature, therefore, the dual polarized antenna formed by the two also have simple structure, compact, production easy to process advantage.

Description

A kind of dual polarized antenna of planar monopole and half slot structure

Technical field

The present invention relates to a kind of dual polarized antennas, and in particular to a kind of dual polarization day of planar monopole and half slot structure Line.

Background technique

Dual polarized antenna makes aerial radiation go out the polarized wave of different directions by different feeding classifications, is conducive to transmitting It is middle to realize effective diversity, thus the decline of confrontation communication quality due to caused by multipath fading, it can conduct in mimo systems Transmitting antenna or receiving antenna.

The opposite radiation polarization purity of existing dual polarized antenna is not high, while the flexibility designed is lower.

Summary of the invention

Goal of the invention: in order to overcome the drawbacks of the prior art, the present invention provides a kind of planar monopole and half slot structure Dual polarized antenna, the antenna structure is simple, has low section, light-weight characteristic, production easy to process, while with higher Polarization purity and flexible design degree.

Technical solution: a kind of dual polarized antenna of planar monopole and half slot structure of the present invention, including medium base Plate, plane single pole sub antenna unit, half slot antenna unit and feed structure unit；The medium substrate, which has, to be parallel to each other Upper and lower surfaces；The plane single pole sub antenna unit includes metal floor and monopole radiating doublet；The metal Plate is rectangle, and is set to the lower surface side of medium substrate；The monopole radiating doublet is elongated, is set to and is given an account of The upper surface other side of matter substrate, the long side of metal floor described in the extending direction perpendicular bisected of monopole radiating doublet；Metal The long side intermediate vertical being located in the middle part of the lower surface on floor opens up jagged, which extends to form one on metal floor Open half slot closed at one end in end, half slot is as the half slot antenna unit；The feed structure unit includes metal connection Portion and two feed ports, the metallic connection parts are set to one end of monopole radiating doublet, described two feed ports point It is not connected on two sides in the gap, the other end of two feed ports is vertically through the medium substrate and difference It is connected to the two sides of the metallic connection parts.

Preferably, the part that the metal floor and the monopole radiating doublet are located at medium substrate central region exists It is formed and is interlocked on the thickness direction of medium substrate.So as to improve the matching performance of plane single pole sub antenna unit.

Further, which further includes feeder line, described two feed ports respectively with the feed line Road electrical connection.

Wherein, when the feeder line carries out even mould feed by two feed ports, plane single pole sub antenna unit It works and gives off vertically polarized wave.

When feeder line carries out odd mould feed by two feed ports, half slot antenna cell operation simultaneously gives off level Polarized wave.

The utility model has the advantages that compared with prior art, monopole is respectively set by the upper and lower surface in medium substrate in the present invention Plane single pole sub antenna unit is collectively formed in radiating doublet and metal floor；Half slot is formed by opening up half slot on metal floor Antenna element；And feed structure unit is formed by the feed port that metallic connection parts and two are arranged in medium substrate and is used To be electrically connected to monopole radiating doublet and metal floor；To utilize the spy of both antenna element polarization orthogonals Property, by different feeding modes, realize two kinds of different line polarization waves in same frequency, and polarization with higher is pure Degree.In addition, plane single pole sub antenna unit and half slot antenna unit all have low section, light-weight, easy to process feature, because This, the dual polarized antenna flexible design degree formed by the two higher also simple, compact, production easy to process with structure Advantage.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the upper surface of dual polarized antenna of the invention；

Fig. 2 is the enlarged partial isometric view of feed structure unit in Fig. 1；

Fig. 3 is the structural schematic diagram of the lower surface of dual polarized antenna of the invention；

Fig. 4 is the overlooking structure diagram of dual polarized antenna in Fig. 3；

Fig. 5 is the right side structural representation of dual polarized antenna in Fig. 3；

Fig. 6 is the antenna return loss characteristic under the two kinds of feeding modes of even mould and Qi Mo calculated using HFSS software；

Fig. 7 is the main polarization and cross polarization that the lower face xoy, the face xoz, the face yoz are fed using the even mould that HFSS software calculates Antenna pattern；

Fig. 8 is the main polarization and cross polarization that the lower face xoy, the face xoz, the face yoz are fed using the odd mould that HFSS software calculates Antenna pattern.

Specific embodiment

In the following, being described in further details in conjunction with attached drawing to the present invention.

As shown in Figs. 1-5, present embodiment discloses the dual polarized antennas of a kind of planar monopole and half slot structure, including are situated between Matter substrate 1, metal floor 2, monopole radiating doublet 3, half slot 4, metallic connection parts 5 and two feed ports 6.

Wherein, medium substrate 1 is rectangle structure and has the upper and lower surfaces being parallel to each other, antenna element production On the medium substrate 1.Orientation shown in Fig. 5 is please referred to, the metal floor 2 of bottom is covered on the right side of the lower surface of medium substrate 1, The monopole radiating doublet 3 of top layer is covered on the left of the upper surface of medium substrate 1, and metal floor 2 and monopole radiating doublet 3 are total With the plane single pole sub antenna unit for forming the dual polarized antenna.

Specifically, metal floor 2 is rectangle structure, the length of long side is about half-wavelength, and the length of short side is about four / mono- wavelength.In the present embodiment, a long side of metal floor 2 is located at the middle part of 1 lower surface of medium substrate, another long side With lower surface a side of medium substrate 1 along concordant.And preferably, the long side length of metal floor 2 is half-wavelength, short side is long Degree is quarter-wave.

Monopole radiating doublet 3 is the metal band of strip, and length is about quarter-wave.And in the present embodiment In, the length of the monopole radiating doublet of the strip is preferably quarter-wave.Monopole radiating doublet 3 is from medium substrate The other side edge of 1 upper surface extends to the middle part of the upper surface, the long side of extending direction perpendicular bisected metal floor 2.

The middle position of the long side in the middle part of the lower surface of medium substrate 1 of metal floor 2 vertically open up it is jagged, should Notch extends on metal floor 2 and forms half slot 4 closed at one end open at one end, by half slot 4 as dual polarized antenna Half slot antenna unit.Specifically, the length of half slot 4 is preferably a quarter guide wavelength in the present embodiment.

Metallic connection parts 5 and two feed ports 6 form feed structure unit.Wherein, two feed ports 6 connect respectively It connects in the two sides of metallic connection parts 5, and the other end of two feed ports 6 runs through medium substrate 1 and is separately connected positioned at Jie On two sides of half slot 4 of 1 lower surface of matter substrate.

Referring to Fig. 5, in order to improve the matching performance of monopole, monopole radiating doublet 3 and metal floor 2 are located at The part of 1 central region of medium substrate has one section of formation to be overlapping on 1 thickness direction of medium substrate.That is, being located at upper table One end of the monopole radiating doublet 3 of face side extends and exceeds one section of the edge of the metal floor 2 positioned at the lower surface other side Then length is connected with metallic connection parts 5.

And two feed ports 6 and metallic connection parts 5 can change half slot antenna unit relative to the location of half slot 4 Self-impedance, to can also improve the matching performance of half slot antenna unit.

Further, which further includes feeder line, described two feed ports 6 respectively with the feed line Road electrical connection.Specifically, when the feeder line carries out even mould feed by two feed ports 6, plane single pole sub antenna Cell operation simultaneously gives off vertically polarized wave.When feeder line carries out odd mould feed by two feed ports 6, half slot antenna Cell operation simultaneously gives off horizontal polarized wave.

As shown in fig. 6, in the present embodiment, medium substrate 1 according to dielectric constant 4.4, with a thickness of 1 millimeter of design when, utilize Return loss under two kinds of feeding modes of antenna that HFSS software calculates.Under odd mould feeding mode, the working frequency of antenna is The 2.4GHz, -10dB impedance bandwidth of antenna are 24% (2.2GHz-2.8GHz)；Under even mould feeding mode, the work frequency of antenna Rate is 2.4GHz, and -10dB the impedance bandwidth of antenna is 24% (2.2GHz-2.8GHz).The work of antenna under two kinds of feeding classifications Frequency is consistent with -10dB impedance bandwidth.

As shown in fig. 7, planar monopole of the present embodiment and the dual polarized antenna of half slot structure, are calculated using HFSS software Even mould feed under the conditions of the face xoy, the face xoz, the main polarization and cross-polarized radiation direction in the face yoz.Wherein the face xoz and The cross polarization in the face yoz is lower than -30dB, is not shown on figure.

As shown in figure 8, planar monopole of the present embodiment and the dual polarized antenna of half slot structure, are calculated using HFSS software Odd mould feed under the conditions of the face xoy, the face xoz, the main polarization and cross-polarized radiation direction in the face yoz.Wherein the face xoz and The cross polarization in the face yoz is lower than -30dB, is not shown on figure.

By above-mentioned test it is found that the dual polarized antenna of planar monopole and half slot structure of the invention has same work The not like-polarized operating mode of two kinds of frequency, and superior performance.

Claims

1. a dual-polarized antenna of a planar monopole and a half-slot structure, characterized in that, comprising a dielectric substrate (1), a planar monopole antenna unit, a half-slot antenna unit and a feed structure unit;

The dielectric substrate (1) has an upper surface and a lower surface that are parallel to each other;

The planar monopole antenna unit includes a metal floor (2) and a monopole radiating element (3); the metal floor (2) is rectangular and is arranged on the lower surface side of the dielectric substrate (1); the monopole The pole radiation oscillator (3) is in the shape of a long strip and is arranged on the other side of the upper surface of the dielectric substrate (1). The long side;

A gap is vertically opened in the middle of the long side of the metal floor (2) in the middle of the lower surface, and the gap extends on the metal floor (2) to form a half groove (4) with one end open and one end closed, the half groove (4) serving as a the half-slot antenna unit;

The feeding structure unit comprises a metal connecting part (5) and two feeding ports (6), the metal connecting part (5) is arranged at one end of the monopole radiating oscillator (3), and the two feeding ports (6) The ports (6) are respectively connected on the two sides of the slot (4), and the other ends of the two feeding ports (6) vertically penetrate the dielectric substrate (1) and are respectively connected to the metal connecting parts ( 5) on both sides.

2. The dual-polarized antenna with a planar monopole and a half-slot structure according to claim 1, wherein the metal floor (2) and the monopole radiating element (3) are located on a dielectric substrate (1) ) The part of the middle region is staggered in the thickness direction of the dielectric substrate (1).

3 . The dual-polarized antenna of the planar monopole and half-slot structure according to claim 1 , further comprising a feeder line, and the two feeder ports (6) are respectively connected to the feeder line. 4 . electrical connection.

4. The dual-polarized antenna of a planar monopole and a half-slot structure according to claim 3, characterized in that, when the feeding line performs even-mode feeding through two feeding ports (6), the planar The monopole antenna element works and radiates vertically polarized waves.

5. The dual-polarized antenna of a planar monopole and a half-slot structure according to claim 4, characterized in that, when the feeder line performs odd-mode feeding through two feeder ports (6), the half-slot antenna The unit works and radiates horizontally polarized waves.

6. The dual-polarized antenna of a planar monopole and a half-slot structure according to claim 1, wherein the length of the long side of the metal floor (2) is half a wavelength, and the length of the short side is a quarter wavelength.

7 . The dual-polarized antenna with a planar monopole and half-slot structure according to claim 6 , wherein the length of the monopole radiating element ( 3 ) is a quarter wavelength. 8 .

8 . The dual-polarized antenna with a planar monopole and half-slot structure according to claim 6 , wherein the length of the half-slot ( 4 ) is a quarter of the guided wave wavelength. 9 .