CN108461919B - Multi-frequency microstrip antenna and impedance matching adjustment method thereof - Google Patents
Multi-frequency microstrip antenna and impedance matching adjustment method thereof Download PDFInfo
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- CN108461919B CN108461919B CN201810160257.1A CN201810160257A CN108461919B CN 108461919 B CN108461919 B CN 108461919B CN 201810160257 A CN201810160257 A CN 201810160257A CN 108461919 B CN108461919 B CN 108461919B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a multi-frequency microstrip antenna and an impedance matching adjustment method thereof. Comprising the following steps: dielectric plate, probe, strip metal, metal patch; the strip-shaped metal is printed on the upper surface of the dielectric plate; the probe penetrates through the dielectric plate to be connected with one end of the strip-shaped metal, and the other end of the probe is connected with the feed port. According to the impedance matching adjustment method, the impedance matching of the multi-frequency antenna in a wide frequency ratio range is realized by changing the position of the probe, the position and the length of the strip-shaped metal. The invention has the advantages that: the dual-band antenna has the advantages that the dual-band antenna can realize excellent impedance matching in two frequency bands, can realize the functions of outputting and inputting signals in a plurality of frequency bands through a single port, can realize double-fed feeding through an antenna, has good circular polarization performance, is simple in design structure and high in realization process, has no special requirements on material parameters and appearance parameters of two layers of media, is easy to realize in engineering, realizes the dual-band antenna design with wide frequency ratio range, has universality, and can be used for double-fed design and single-fed design.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a multi-frequency microstrip antenna and an impedance matching adjustment method thereof.
Background
Antennas are an important component in wireless communication systems, having the ability to transform guided waves propagating on a transmission line into electromagnetic waves propagating in an unbounded medium. Microstrip antenna is an important antenna form, carries out the transceiver of electromagnetic wave through the radiation paster, simple structure performance is good.
With the continuous development of antennas, a multi-frequency microstrip antenna is proposed. The antenna can work in two different frequency bands simultaneously, radiate circularly polarized waves, and signals in different frequency bands are communicated with the radio frequency front end through the same port.
In the last forty years, students at home and abroad research and perfect the theory and design of the multi-frequency microstrip antenna. One of the main design modes is realized by adopting a mode of a laminated microstrip antenna, two layers of microstrip patches respectively work in different frequency bands, an upper layer antenna feeds by a probe direct connection mode, and a lower layer antenna feeds by a hole coupling mode. The position of the probe is necessarily related to impedance matching of a plurality of frequency bands, and in order to achieve impedance matching of a plurality of frequency bands, the following several ways are proposed: 1. the upper patch and the lower patch are matched simultaneously by moving the position of the upper patch, and the method has the main defects that the antenna radiation performance is influenced by the fact that the upper patch is deviated from the center of the lower patch, and on the other hand, the method cannot be used for double-fed design with better circular polarization performance; 2. the patch is subjected to slotting loading and other treatments to realize matching, and the method affects the radiation performance of the antenna and cannot be used for double-feed design; 3. the method cannot realize good matching of two frequency bands at the same time, and influences radiation performance; 4. the method has the main defects of time consumption, low efficiency and large workload in the implementation process, and cannot ensure that the optimized materials are available in engineering processing. At present, for a multi-frequency microstrip antenna, an efficient design method is still needed, so that the radiation performance of the antenna can be guaranteed, and the antenna has engineering realizability.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel multi-frequency microstrip antenna design method.
The technical scheme adopted by the invention is as follows:
a multi-frequency microstrip antenna comprising: the metal floor 1, the double-feed network 2, the dielectric plate A3, the metal patch A4, the dielectric plate B5, the metal patch B6, the two probes A7, the two probes B8, the strip-shaped metal A9 and the strip-shaped metal B10;
the upper surface of the metal floor 1 is provided with a double-feed network 2;
the dielectric plate A3 is arranged on the surface of the double-fed feed network 2;
the area of the metal patch A4 is smaller than that of the dielectric plate A3, and the metal patch A4 is printed on the surface of the dielectric plate A3;
the area of the dielectric plate B5 is smaller than that of the metal patch A4, and the dielectric plate B5 is arranged on the surface of the metal patch A4;
the area of the metal patch B6 is smaller than that of the dielectric plate B5, and the metal patch B6 is printed on the surface of the dielectric plate B5;
two openings vertically penetrating through the dielectric plate A3 are formed in the surface of the dielectric plate A3, and the openings are used for placing two probes A7;
two openings vertically penetrating through the dielectric plate B5 are formed in the surface of the dielectric plate B5, and the openings are used for placing two probes B8;
the surface of the metal patch A4 is provided with a strip-shaped groove, the shapes of the strip-shaped metal A9, the strip-shaped metal B10 and the strip-shaped groove are matched, but the areas of the strip-shaped metal A9 and the strip-shaped metal B10 are smaller than those of the strip-shaped groove, the strip-shaped metal A9 and the strip-shaped metal B10 are connected with the dielectric plate A3 through the hollow part of the strip-shaped groove, and the strip-shaped metal A9 and the strip-shaped metal B10 are not contacted with the metal patch A4;
the top ends of the two probes A7 are respectively connected with one ends of the strip-shaped metal A9 and the strip-shaped metal B10, and the bottom ends of the two probes B8 are connected with the other ends of the strip-shaped metal A9 and the strip-shaped metal B10.
The bottom ends of the two probes A7 are connected with the doubly-fed feed network 2, and the top ends of the two probes B8 are connected with the metal patch B6.
Further, the metal patch A4 extends around the tuning support a11, which does not extend beyond the edge of the dielectric plate A3.
Further, the metal patch B6 extends around the tuning stub B12, which does not extend beyond the edge of the dielectric plate B5.
According to the impedance matching adjustment method based on the multi-frequency microstrip antenna, when the antenna is designed, the positions of the probe A7 and the probe B8 in the dielectric plate A3 and the dielectric plate B5 are changed, and the positions of the strip-shaped metal A9 and the strip-shaped metal B10 are changed along with the positions, so that the multi-frequency-band simultaneous matching adjustment is realized.
Compared with the prior art, the invention has the advantages that: the method can realize excellent impedance matching in two frequency bands simultaneously, has simple design structure and high efficiency in the implementation process, has no special requirements on material parameters and appearance parameters of two layers of media, is easy to realize engineering, can realize the design of a dual-frequency antenna with any frequency ratio, has universality, and can be used for double-feed design and single-feed design.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
fig. 2 is a top view of a metal patch a according to an embodiment of the present invention;
fig. 3 is a top view of a metal patch B according to an embodiment of the present invention;
FIG. 4 is a graph of the reflection coefficient of an antenna according to an embodiment of the present invention;
FIG. 5 is a diagram of radiation patterns of an x-z plane corresponding to a first resonant frequency of an antenna according to an embodiment of the present invention;
FIG. 6 is a diagram of radiation patterns of an x-z plane corresponding to a second resonant frequency of an antenna according to an embodiment of the present invention;
FIG. 7 is a graph showing the reflection coefficient of the antenna when the matching of the upper radiation structure is adjusted according to the embodiment of the present invention;
FIG. 8 is a graph of the reflection coefficient of the antenna when matching the lower radiation structure is adjusted in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below by referring to the accompanying drawings and examples.
As shown in fig. 1, 2 and 3, a multi-frequency microstrip antenna includes: the metal floor 1, the double-feed network 2, the dielectric plate A3, the metal patch A4, the dielectric plate B5, the metal patch B6, the two probes A7, the two probes B8, the strip-shaped metal A9 and the strip-shaped metal B10;
the area of the metal floor 1 is the same as that of the doubly-fed feed network 2, and the doubly-fed feed network 2 is arranged on the upper surface of the metal floor 1;
the area of the dielectric plate A3 is smaller than that of the double-feed network 2, and the dielectric plate A3 is arranged on the surface of the double-feed network 2;
the area of the metal patch A4 is smaller than that of the dielectric plate A3, and the metal patch A4 is printed on the surface of the dielectric plate A3;
the area of the dielectric plate B5 is smaller than that of the metal patch A4, and the dielectric plate B5 is arranged on the surface of the metal patch A4;
the area of the metal patch B6 is smaller than that of the dielectric plate B5, and the metal patch B6 is printed on the surface of the dielectric plate B5;
two openings vertically penetrating through the dielectric plate A3 are formed in the surface of the dielectric plate A3, and the openings are used for placing two probes A7;
two openings vertically penetrating through the dielectric plate B5 are formed in the surface of the dielectric plate B5, and the openings are used for placing two probes B8;
the surface of the metal patch A4 is provided with a strip-shaped groove, the shapes of the strip-shaped metal A9, the strip-shaped metal B10 and the strip-shaped groove are matched, but the areas of the strip-shaped metal A9 and the strip-shaped metal B10 are smaller than those of the strip-shaped groove, the strip-shaped metal A9 and the strip-shaped metal B10 are connected with the dielectric plate A3 through the hollow part of the strip-shaped groove, and the strip-shaped metal A9 and the strip-shaped metal B10 are not contacted with the metal patch A4;
the top ends of the two probes A7 are respectively connected with one ends of the strip-shaped metal A9 and the strip-shaped metal B10, and the bottom ends of the two probes B8 are connected with the other ends of the strip-shaped metal A9 and the strip-shaped metal B10.
The bottom ends of the two probes A7 are connected with the doubly-fed feed network 2, and the top ends of the two probes B8 are connected with the metal patch B6.
As shown in fig. 2, the metal patch A4 extends around the tuning branch a11.
As shown in fig. 3, the metal patch B6 extends around the tuning support B12.
The positions of the probes A7 and B8 depend on the original design; the multi-band simultaneous matching can be realized well by changing the positions of the probe A7 and the probe B8 in the dielectric plate A3 and the dielectric plate B5.
For designing the double-fed microstrip antenna, the most preferable scheme of the strip metal A9 and the strip metal B10 is positioned on the diagonal line or on the middle vertical line of the side of the metal patch A4; for designing a single-fed microstrip antenna, the different positions required are also different, depending entirely on the original design, an example of the present invention being a double-fed microstrip antenna.
The reflection coefficient curve of the antenna at the center frequency is shown in fig. 4, the antenna resonates at 1.268GHz and 1.558GHz, the reflection coefficient is below-30 dB, and the matching is good.
The X-Z plane right-hand circular polarization radiation pattern corresponding to the resonant frequency of 1.268GHz is shown in figure 5, the normal right-hand circular polarization gain is 4.2dB, and the antenna has excellent circular polarization performance at 1.268 GHz.
The right-hand circular polarization radiation pattern of the X-Z plane corresponding to the resonant frequency of 1.558GHz is shown in figure 6, the right-hand circular polarization gain of the normal is 4.9dB, and the antenna has excellent circular polarization performance at 1.558 GHz.
According to the embodiment of the invention, through the novel matching structure, the matching at the 1.268GHz position is independently regulated as shown in fig. 7, and the matching at the 1.268GHz position can be changed on the premise of keeping good matching at the 1.558GHz position.
According to the embodiment of the invention, through the novel matching structure, the matching at the 1.558GHz position is independently regulated as shown in fig. 8, and the matching at the 1.558GHz position can be changed on the premise of keeping good matching at the 1.268GHz position.
Those of ordinary skill in the art will appreciate that the embodiments described herein are intended to aid the reader in understanding the practice of the invention and that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.
Claims (3)
1. An impedance matching adjusting method of a multi-frequency microstrip antenna is characterized in that:
the multi-frequency microstrip antenna comprises: the metal floor (1), the double-feed network (2), the dielectric plate A (3), the metal patch A (4), the dielectric plate B (5), the metal patch B (6), the two probes A (7), the two probes B (8), the strip-shaped metal A (9) and the strip-shaped metal B (10);
the upper surface of the metal floor (1) is provided with a double-feed network (2);
the dielectric plate A (3) is arranged on the surface of the double-fed feed network (2);
the area of the metal patch A (4) is smaller than that of the dielectric plate A (3), and the metal patch A (4) is printed on the surface of the dielectric plate A (3);
the area of the dielectric plate B (5) is smaller than that of the metal patch A (4), and the dielectric plate B (5) is arranged on the surface of the metal patch A (4);
the area of the metal patch B (6) is smaller than that of the dielectric plate B (5), and the metal patch B (6) is printed on the surface of the dielectric plate B (5);
two openings vertically penetrating through the dielectric plate A (3) are formed in the surface of the dielectric plate A (3), and the two openings are used for placing two probes A (7);
two openings vertically penetrating through the dielectric plate B (5) are formed in the surface of the dielectric plate B (5), and the two openings are used for placing two probes B (8);
the surface of the metal patch A (4) is provided with a strip-shaped groove, the shapes of the strip-shaped metal A (9), the strip-shaped metal B (10) and the strip-shaped groove are matched, but the areas of the strip-shaped metal A (9) and the strip-shaped metal B (10) are smaller than those of the strip-shaped groove, the strip-shaped metal A (9) and the strip-shaped metal B (10) are connected with the dielectric plate A (3) through the hollow part of the strip-shaped groove, and the strip-shaped metal A (9) and the strip-shaped metal B (10) are not contacted with the metal patch A (4);
the top ends of the two probes A (7) are respectively connected with one ends of the strip-shaped metal A (9) and the strip-shaped metal B (10), and the bottom ends of the two probes B (8) are connected with the other ends of the strip-shaped metal A (9) and the strip-shaped metal B (10);
the bottom ends of the two probes A (7) are connected with the double-fed feed network (2), and the top ends of the two probes B (8) are connected with the metal patch B (6);
when the multi-frequency microstrip antenna is designed, the positions of the probe A (7) and the probe B (8) in the dielectric plate A (3) and the dielectric plate B (5) are changed, and the positions of the strip-shaped metal A (9) and the strip-shaped metal B (10) are changed along with the positions, so that the multi-frequency-band simultaneous matching adjustment is realized.
2. The method for adjusting impedance matching of a multi-frequency microstrip antenna according to claim 1, wherein: the periphery of the metal patch A (4) is extended with a tuning support joint A (11) which extends to be not more than the edge of the dielectric plate A (3).
3. The method for adjusting impedance matching of a multi-frequency microstrip antenna according to claim 1, wherein: the periphery of the metal patch B (6) is extended with a tuning support B (12) which extends to not exceed the edge of the dielectric plate B (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810160257.1A CN108461919B (en) | 2018-02-26 | 2018-02-26 | Multi-frequency microstrip antenna and impedance matching adjustment method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810160257.1A CN108461919B (en) | 2018-02-26 | 2018-02-26 | Multi-frequency microstrip antenna and impedance matching adjustment method thereof |
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| Publication Number | Publication Date |
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| CN108461919A CN108461919A (en) | 2018-08-28 |
| CN108461919B true CN108461919B (en) | 2023-07-21 |
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| CN201810160257.1A Active CN108461919B (en) | 2018-02-26 | 2018-02-26 | Multi-frequency microstrip antenna and impedance matching adjustment method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113809529B (en) * | 2021-08-03 | 2022-11-11 | 北京邮电大学 | Dual-band impedance matching microstrip antenna and antenna array |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931122A (en) * | 2010-08-27 | 2010-12-29 | 电子科技大学 | C/X dual-band microstrip antenna |
| CN205583136U (en) * | 2016-05-05 | 2016-09-14 | 成都北斗天线工程技术有限公司 | Circular polarization microstrip antenna that can accurate frequency modulation |
| WO2016168951A1 (en) * | 2015-04-18 | 2016-10-27 | 江苏亨鑫科技有限公司 | Dual-frequency dual-polarized base station antenna for parallel dual feeding |
| CN106816701A (en) * | 2017-01-16 | 2017-06-09 | 西安电子科技大学 | Double frequency round polarized microstrip antenna |
| CN208014902U (en) * | 2018-02-26 | 2018-10-26 | 成都北斗天线工程技术有限公司 | A kind of multifrequency microstrip antenna |
-
2018
- 2018-02-26 CN CN201810160257.1A patent/CN108461919B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931122A (en) * | 2010-08-27 | 2010-12-29 | 电子科技大学 | C/X dual-band microstrip antenna |
| WO2016168951A1 (en) * | 2015-04-18 | 2016-10-27 | 江苏亨鑫科技有限公司 | Dual-frequency dual-polarized base station antenna for parallel dual feeding |
| CN205583136U (en) * | 2016-05-05 | 2016-09-14 | 成都北斗天线工程技术有限公司 | Circular polarization microstrip antenna that can accurate frequency modulation |
| CN106816701A (en) * | 2017-01-16 | 2017-06-09 | 西安电子科技大学 | Double frequency round polarized microstrip antenna |
| CN208014902U (en) * | 2018-02-26 | 2018-10-26 | 成都北斗天线工程技术有限公司 | A kind of multifrequency microstrip antenna |
Non-Patent Citations (2)
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| 应用于北斗和GPS的双频小型圆极化微带天线;陈兆丰;潘锦;;电子科技(12);122-125+133 * |
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