CN104134871B - High isolation half line of rabbet joint gap aerial array - Google Patents
High isolation half line of rabbet joint gap aerial array Download PDFInfo
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- CN104134871B CN104134871B CN201410351597.4A CN201410351597A CN104134871B CN 104134871 B CN104134871 B CN 104134871B CN 201410351597 A CN201410351597 A CN 201410351597A CN 104134871 B CN104134871 B CN 104134871B
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Abstract
High isolation half line of rabbet joint gap aerial array relates to a kind of multi-input/output antenna. This antenna is made up of three and half line of rabbet joint gap antennas putting together radiation polarization direction pairwise orthogonal, and each half groove slot antenna is made up of microstrip feed line on medium substrate and metal ground plane; Metal ground plane has radiation half line of rabbet joint and a plurality of isolation gap; Radiating half line of rabbet joint shape is rectangle, and its one end is short circuit, and its other end is open circuit; Isolation gap around radiation half line of rabbet joint is all parallel to each other; Radiate half line of rabbet joint long side direction to be mutually perpendicular to the long side direction isolating gap; The resonant frequency in isolation gap is lower than operating frequency of antenna; One end of microstrip feed line is the input/output port of antenna, and the end of the microstrip feed line conduction band of the microstrip feed line other end has a short circuit metal pin, and short circuit metal pin is connected conduction band at the edge of radiation half line of rabbet joint with metal ground plane. This antenna can effectively reduce metallic ground in the face of the adverse effect blocked and isolate of antenna normal radiation.
Description
Technical field
The present invention relates to a kind of microwave antenna, half line of rabbet joint gap aerial array of especially a kind of high isolation.
Background technology
Multiple-input and multiple-output (MIMO) technology is a kind of raising information carrying capacity effective technology, multipolarization MIMO is a kind of technology wherein commonly used, the antenna array of multipolarization mimo system is shown two or more element antenna and is constituted aerial array, these element antennas have mutually orthogonal radiation polarization direction, in order to ensure good channel isolation, it is desirable to have good isolation between the element antenna of these different polarised directions. Common slot antenna may serve to constitute the aerial array for multipolarization MIMO, but the isolation of these antenna array is not as high.
Owing to the metal ground plane of slot antenna can sense the electric current of multiple directions, the radiation of these electric currents causes the decline of the isolation between antenna, when the antenna of different polarised directions is co-located be placed on a place time, due to the distance between antenna become closer to, the electric current sensed each other is strengthened so that the problem of isolation between antennas is even more serious; Additionally the antenna in different radiation polarization directions is co-located when placing, and blocking of another radiation field of aerial can be made another antenna directivity impacted by an antenna metal ground plane, and the radiation characteristic in the direction that is especially blocked can worsen.
Summary of the invention
Technical problem: the purpose of the present invention is to propose to a kind of co-located high isolation half line of rabbet joint gap aerial array, it is possible to effectively lower faradic impact on metal covering, improves the isolation between the element antenna of different radiation polarization directions; Secondly the impact mutually blocked between different units antenna can be reduced.
Technical scheme: high isolation half line of rabbet joint gap aerial array of the present invention is by putting together and three and half line of rabbet joint gap antennas of the mutual pairwise orthogonal in radiation polarization direction form; Each half groove slot antenna includes the microstrip feed line and the metal ground plane that are positioned on medium substrate; Metal ground plane has radiation half line of rabbet joint and perpendicular a plurality of isolation gap;Radiating half line of rabbet joint shape is rectangle, and the one end radiating half line of rabbet joint is short circuit, and the other end is open circuit; Isolation gap is around radiation half line of rabbet joint, and its shape is narrow rectangle; Isolation gap is all parallel to each other, and isolates one end or the short circuit in gap, or is stretched over the edge of metal ground plane, is opened a way in this one end in isolation gap; The other end in isolation gap or short-circuit or open circuit.
The length radiating half line of rabbet joint is approximately the half of antenna operating wavelength.
The length in isolation gap to make its resonant frequency operating frequency lower than antenna.
The ground plane of microstrip feed line is exactly metal ground plane, and the conduction band of microstrip feed line is at the another side of medium substrate; The outer end of microstrip feed line is the input/output port of antenna, and in the inner of microstrip feed line, the conduction band of microstrip feed line crosses over radiation half line of rabbet joint, and the end of conduction band has a short circuit metal pin; Short circuit metal pin access point in the long side edge of radiation half line of rabbet joint is connected conduction band with metal ground plane; Access point to make the standing wave of antenna as far as possible little in the position of radiation half line of rabbet joint long side edge.
In order to reduce the input standing wave of antenna further, it is also possible to regulate access point and leave the distance of radiation half line of rabbet joint long side edge.
Beneficial effect: the invention has the beneficial effects as follows, proposed high isolation half line of rabbet joint gap aerial array, it is possible not only to effectively lower the faradic current adverse effect to aerial radiation and isolation in metal ground plane, make in aerial array that the isolation between different half groove slot antennas is high, in aerial array between different half groove slot antennas each other to block impact little, and the three and half co-located placements of groove slot antenna so that little and half line of rabbet joint gap antenna metal face the area of the volume of whole aerial array is also reduced.
Accompanying drawing explanation
Fig. 1 is high isolation half line of rabbet joint gap antenna array structure schematic diagram of the present invention, and Fig. 2 is the structural representation of half groove slot antenna.
Figure has: half groove slot antenna 1, medium substrate 2, microstrip feed line 3, metal ground plane 4, radiate half line of rabbet joint 5, isolation gap 6, conduction band 7, input/output port 8, short circuit metal pin 9, access point 10.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
The technical solution adopted in the present invention is: high isolation half line of rabbet joint gap aerial array is by putting together and three and half groove slot antennas 1 of the mutual pairwise orthogonal in radiation polarization direction form; Each half groove slot antenna 1 includes the microstrip feed line 3 and the metal ground plane 4 that are positioned on medium substrate 2; Metal ground plane 4 has radiation half line of rabbet joint 5 and perpendicular a plurality of isolation gap 6; Radiating half line of rabbet joint 5 shape is rectangle, and the one end radiating half line of rabbet joint 5 is short circuit, and the other end is open circuit; Isolation gap 6 is around radiation half line of rabbet joint 5, and its shape is narrow rectangle; Isolation gap 6 is all parallel to each other, and isolates one end or the short circuit in gap 6, or is stretched over the edge of metal ground plane 4, is opened a way in this one end in isolation gap 6; The other end in isolation gap or short-circuit or open circuit.
The length radiating half line of rabbet joint 5 is approximately the half of antenna operating wavelength.
The length in isolation gap to make its resonant frequency operating frequency lower than antenna.
The ground plane of microstrip feed line 3 is exactly metal ground plane 4, and the conduction band 7 of microstrip feed line 3 is at the another side of medium substrate 2; Microstrip feed line 3 outer is the input/output port 8 of antenna, and in the inner of microstrip feed line, the conduction band 7 of microstrip feed line 3 crosses over radiation half line of rabbet joint 5, and the end of conduction band 7 has a short circuit metal pin 9;Short circuit metal pin 9 10 conduction bands 7 of access point on the edge of radiation half line of rabbet joint 5 are connected with metal ground plane 4; Access point 10 to make the standing wave of antenna as far as possible little on radiation half line of rabbet joint 5 edge along the position radiating the half long limit of the line of rabbet joint 5.
In order to reduce the input standing wave of antenna further, it is also possible to regulate access point 10 and leave the distance of radiation half line of rabbet joint 5 long side edge.
Structurally, this high isolation half line of rabbet joint gap aerial array is made up of the unit half groove slot antenna 1 of three radiation polarization direction pairwise orthogonals; Radiate the width of half line of rabbet joint 5 much smaller than the length radiating half line of rabbet joint 5; The width of radiation half line of rabbet joint 5 on different half groove slot antennas 1 or identical or different; The length of radiation half line of rabbet joint 5 on different half groove slot antennas 1 or identical or different; The shape of radiation half line of rabbet joint 5 of half groove slot antenna 1 is except being a rectangle, can also be that the rectangle that two width do not wait connects together composition, namely radiate the line of rabbet joint that half line of rabbet joint 5 is Stepped Impedance, so can reduce the total length of radiation half line of rabbet joint 5, increase the bandwidth of operation of antenna; The width in different isolation gaps 6 or identical or different, different length isolating gaps 6 or identical or different, spacing between adjacent isolation gap 6 or identical or different; Isolation gap 6 is distributed in radiation half line of rabbet joint 5 around, and isolation gap 6 also affects the operating frequency of antenna, isolation gap 6 from radiate half line of rabbet joint 5 more close to, the impact of operating frequency of antenna is more big.
On manufacturing, three unit half groove slot antennas 1 of high isolation half line of rabbet joint gap aerial array are produced on three dielectric substrates 2, the thickness of three medium substrates 2 or identical or different, the normal direction of three medium substrates is mutually perpendicular to, and three medium substrates intersect at a right angle; Can adopt dielectric material that antenna is carried out structure to fix; The input/output port of antenna intersects the direction at right angle leaving three medium substrates, to facilitate feed.
In accordance with the above, the present invention can just be realized.
Claims (3)
1. high isolation half line of rabbet joint gap aerial array, is characterized in that this aerial array is by putting together and three and half groove slot antennas (1) of the mutual pairwise orthogonal in radiation polarization direction form; Each half groove slot antenna (1) includes the microstrip feed line (3) and the metal ground plane (4) that are positioned on medium substrate (2); Metal ground plane (4) has a radiation half line of rabbet joint (5) and perpendicular a plurality of isolation gap (6); Radiating half line of rabbet joint (5) shape is rectangle, and the one end radiating half line of rabbet joint (5) is short circuit, and the other end is open circuit; Isolation gap (6) is around radiation half line of rabbet joint (5), and its shape is narrow rectangle; Isolation gap (6) is all parallel to each other, and isolates one end or the short circuit in gap (6), or is stretched over the edge of metal ground plane (4), isolation gap (6) is opened a way in this one end; The other end in isolation gap or short-circuit or open circuit;
Wherein:
The ground plane of described microstrip feed line (3) is exactly metal ground plane (4), the conduction band (7) of microstrip feed line (3) another side in medium substrate (2); The outer end of microstrip feed line (3) is the input/output port (8) of antenna, the inner at microstrip feed line, the conduction band (7) of microstrip feed line (3) crosses over radiation half line of rabbet joint (5), and the end of conduction band (7) has a short circuit metal pin (9); Short circuit metal pin access point (10) in the long side edge of radiation half line of rabbet joint (5) is connected conduction band (7) with metal ground plane (4);Access point (10) to make the standing wave of antenna as far as possible little in the position of radiation half line of rabbet joint (5) long side edge.
2. a kind of high isolation half line of rabbet joint gap aerial array according to claim 1, is characterized in that the length of radiation half line of rabbet joint (5) is approximately 1/4th of antenna operating wavelength.
3. a kind of high isolation half line of rabbet joint gap aerial array according to claim 1, is characterized in that the length in isolation gap to make its resonant frequency operating frequency lower than antenna.
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| CN201410351597.4A CN104134871B (en) | 2014-07-22 | 2014-07-22 | High isolation half line of rabbet joint gap aerial array |
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| CN201410351597.4A CN104134871B (en) | 2014-07-22 | 2014-07-22 | High isolation half line of rabbet joint gap aerial array |
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| CN104134871B true CN104134871B (en) | 2016-06-08 |
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