CN110265777B - Shaped plane yagi log periodic antenna - Google Patents
Shaped plane yagi log periodic antenna Download PDFInfo
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- CN110265777B CN110265777B CN201910479491.5A CN201910479491A CN110265777B CN 110265777 B CN110265777 B CN 110265777B CN 201910479491 A CN201910479491 A CN 201910479491A CN 110265777 B CN110265777 B CN 110265777B
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- Prior art keywords
- dipole
- dipole arm
- dielectric substrate
- arm
- metal structure
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- 230000000737 periodic effect Effects 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 238000007493 shaping process Methods 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 39
- 238000005452 bending Methods 0.000 claims description 6
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract 1
- 230000001965 increasing effect Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000008207 working material Substances 0.000 description 1
Classifications
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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
-
- 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
-
- 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
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/10—Logperiodic antennas
- H01Q11/105—Logperiodic antennas using a dielectric support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
- H01Q19/30—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
Landscapes
- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses a shaped plane yagi log periodic antenna, wherein a layer of metal structure is respectively etched on the upper surface and the lower surface of a printed circuit board, and the metal material is copper. The upper metal structure consists of a dipole array and a shaping director, the lower metal structure consists of a dipole array and a grounding structure, the dipole arms are S-shaped, and the directors are in the shape of straight line sections and arc sections which are connected alternately. The dipole arms can effectively improve the antenna gain after being shaped, and the gain can be improved by adding the directors. The invention has small volume, light weight, low section and easy integration, and has stronger application value in a wireless communication system.
Description
Technical Field
The invention relates to the technical field of microwave, wireless communication and test simulation, in particular to a shaped plane yagi log periodic antenna.
Background
The planar antenna has the characteristics of small volume, light weight, low section and easy integration, and the planar log periodic antenna is very mature in the technology since the invention. The log periodic antenna belongs to a broadband antenna, has stable radiation characteristic and has wide application in a wireless communication system. A log periodic antenna is a non-frequency-varying antenna, and the important characteristics of the antenna, including pattern, polarization, impedance, etc., remain unchanged or slightly changed over a specific broad frequency range. Since conventional log-periodic antenna gains are common, how to increase the antenna gain is an important issue in antenna design.
The most common method for improving the antenna gain is to construct an array, but the influence of feeding, coupling between arrays and the like on the antenna performance needs to be considered additionally, so that the size of the antenna is greatly increased, the design complexity is increased, and the manufacturing cost is increased. The addition of directors is also an effective way to increase the gain of the end-fire antenna, and the gain increasing effect becomes progressively worse as the number of directors increases. When the number of directors is increased to more than 10, the directors are increased again, and the gain is hardly increased. The shaping mode related to the invention is firstly proposed to be applied to the gain improvement of the yagi antenna, has obvious effect, and improves the gain by 3dB after shaping.
Disclosure of Invention
The invention aims to provide a shaped plane yagi log periodic antenna which has the advantages of simple structure, high gain, easiness in processing and the like. The shaping of the dipole arms and directors effectively improves the antenna gain. The introduction of directors causes coupling between the dipole array and the directors and also contributes to the gain improvement. Compared with the traditional plane log-periodic antenna, the gain is obviously improved.
The specific technical scheme for realizing the aim of the invention is as follows:
a shaped plane yagi log periodic antenna is characterized by sequentially comprising a first metal structure, a dielectric substrate and a second metal structure from top to bottom; the dielectric substrate is rectangular;
the first metal structure comprises a microstrip feeder line, an upper layer connecting line, an upper layer first dipole arm, an upper layer second dipole arm, an upper layer third dipole arm, an upper layer fourth dipole arm and a shaping director; the first metal structure is a whole body fixedly connected except the shaping director; the second metal structure is an integral body and comprises a grounding structure, a lower connecting wire, a lower first dipole arm, a lower second dipole arm, a lower third dipole arm and a lower fourth dipole arm;
the microstrip feeder is rectangular, the lower boundary of the microstrip feeder is aligned with the lower boundary of the dielectric substrate, and the vertical center line of the microstrip feeder is aligned with the vertical center line of the dielectric substrate;
the upper connecting line is rectangular and is connected with the microstrip feeder line, and the vertical center line of the upper connecting line is aligned with the vertical center line of the dielectric substrate; the upper first dipole arm, the upper second dipole arm, the upper third dipole arm and the upper fourth dipole arm are all S-shaped, the radian of bending is different, the length and the width are sequentially reduced, the tail end of the upper fourth dipole arm is aligned with the tail end of an upper connecting line, and each dipole arm is staggered and sequentially connected to two sides of the connecting line upwards; the shaping director is of a bilateral symmetry structure and is formed by alternately connecting circular arcs and straight line segments, a symmetry axis is aligned with a vertical center line of the medium substrate, and the shaping director is arranged above a fourth dipole arm on the upper layer;
the grounding structure is of a bilateral symmetry structure, the outer boundary is coincident with the boundary of the medium substrate, and the inner boundary is arc-shaped;
the lower connecting line is rectangular and is connected with the grounding structure, and the vertical center line of the lower connecting line is aligned with the vertical center line of the dielectric substrate; the lower first dipole arm, the lower second dipole arm, the lower third dipole arm and the lower fourth dipole arm are S-shaped, the radian of bending is different, the length and the width are sequentially reduced, the tail end of the lower fourth dipole arm is aligned with the tail end of a lower connecting line, and each dipole arm is staggered and sequentially connected to two sides of the connecting line upwards;
the upper first dipole arm and the lower first dipole arm, the upper second dipole arm and the lower second dipole arm, the upper third dipole arm and the lower third dipole arm, the upper fourth dipole arm and the lower fourth dipole arm are respectively identical in structure and are respectively located at the same height on the medium substrate.
The materials used for the first metal structure and the second metal structure are copper.
The dielectric substrate was Rogers RO4003C, the relative permittivity was 3.55, the loss tangent was 0.0027, and the thickness was 0.508mm.
The microstrip feeder line is simple in design and can achieve 50 omega impedance matching.
The invention has the beneficial effects that the dipole arms are shaped, and the shaping directors are added, so that the gain of the printed log-periodic dipole array antenna is effectively improved, and the application of the directional antenna in wireless communication is facilitated. And the antenna can be directly etched on the substrate of the antenna like the traditional printed antenna, and no processing burden is brought except for the design part, and the size of the antenna is not increased.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a first metal structure according to the present invention;
FIG. 3 is a schematic view of a second metal structure according to the present invention;
fig. 4 is a graph of return loss and gain results for an example.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Examples
Referring to fig. 1, the antenna of the present invention has a 3-layer structure, and includes a dielectric substrate 1, a first metal structure 2 on the upper surface of the dielectric substrate 1, and a second metal structure 3 on the lower surface of the dielectric substrate 1, where the dielectric substrate 1 is rectangular.
Referring to fig. 2, a first metal structure 2 is etched on an upper layer of a dielectric substrate 1, and fig. 2 is a schematic diagram of the first metal structure according to the present invention. As shown in fig. 2, the microstrip feed line 4 is rectangular, the lower boundary of which is aligned with the lower boundary of the dielectric substrate 1, and the vertical center line is aligned with the vertical center line of the dielectric substrate 1; the upper connecting line 5 is rectangular and is connected with the microstrip feeder line 4, and the vertical central line of the upper connecting line is aligned with the vertical central line of the dielectric substrate 1; the upper first dipole arm 6, the upper second dipole arm 7, the upper third dipole arm 8 and the upper fourth dipole arm 9 are all S-shaped, the radian of bending is different, the length and the width are sequentially reduced, the tail end of the upper fourth dipole arm 9 is aligned with the tail end of the upper connecting wire 5, and each dipole arm is staggered and sequentially connected to two sides of the connecting wire 5. The shaping director 10 is of a bilateral symmetry structure and is formed by connecting circular arcs and straight line segments alternately, a symmetry axis is aligned with the vertical center line of the dielectric substrate 1 and is not connected with other parts of the first metal structure 2, and the shaping director is etched above the fourth dipole arm 9 on the upper layer.
Referring to fig. 3, a second metal structure 3 is etched on the lower layer of the dielectric substrate 1, and fig. 3 is a schematic diagram of the second metal structure of the present invention. As shown in fig. 3, the grounding structure 11 has a bilateral symmetry structure, and an outer boundary coincides with a boundary of the dielectric substrate 1, and an inner boundary has a circular arc shape. The lower connecting line 12 is rectangular and is connected to the grounding structure 11, and the vertical center line of the lower connecting line is aligned with the vertical center line of the dielectric substrate 1. The lower first dipole arm 13, the lower second dipole arm 14, the lower third dipole arm 15 and the lower fourth dipole arm 16 are all in an S shape, the radian of bending is different, the length and the width are sequentially reduced, the tail end of the lower fourth dipole arm 16 is aligned with the tail end of the lower connecting line 12, and each dipole arm is staggered and sequentially connected to two sides of the connecting line 12.
Referring to fig. 2-3, the upper first dipole arm 6 and the lower first dipole arm 13, the upper second dipole arm 7 and the lower second dipole arm 14, and the upper third dipole arm) and the lower third dipole arm 15, and the upper fourth dipole arm 9 and the lower fourth dipole arm 16 are respectively identical in structure and respectively located at the same height on the dielectric substrate 1;
referring to fig. 1-3, in design, the preferred dielectric substrate 1 is Rogers RO4003C, which has a dielectric constant of 3.55, a loss tangent of 0.0027, and a dielectric substrate thickness of 0.508mm; the thickness of the metal layers on the upper and lower surfaces of the dielectric substrate 1 was set to 0.035mm, and copper was used as a working material.
Referring to fig. 2-3, all dipole arms and connecting lines form a dipole array as the radiating element of the antenna; the dipole arms can effectively improve the antenna gain through shaping; the grounding structure 11 is used as a reflector to enhance the directivity of the antenna; the function of the director 10 is to further enhance the directivity of the antenna and to increase the gain of the antenna.
Fig. 4 is a graph of simulation results of the present invention. As shown in the figure, the resonant frequency of the antenna is 2.46GHz, the return loss at the point is-33 dB, the impedance bandwidth below-10 dB is 2.3GHz to 2.6GHz, and the gain in the impedance bandwidth is 6.38dBi to 9.65dBi.
While the invention has been described in detail in connection with the preferred embodiments thereof, it should be understood by those skilled in the art that the foregoing is not intended to limit the invention thereto, and that various changes and modifications may be made without departing from the scope of the invention.
Claims (2)
1. The shaped plane yagi log periodic antenna is characterized by comprising a dielectric substrate (1), a first metal structure (2) etched on the upper surface of the dielectric substrate (1) and a second metal structure (3) etched on the lower surface of the dielectric substrate (1);
the first metal structure (2) comprises a microstrip feeder line (4), an upper layer connecting line (5), an upper layer first dipole arm (6), an upper layer second dipole arm (7), an upper layer third dipole arm (8), an upper layer fourth dipole arm (9) and a shaping director (10); the first metal structure (2) is a whole body fixedly connected except the shaping director (10); the second metal structure (3) is an integral body and comprises a grounding structure (11), a lower connecting wire (12), a lower first dipole arm (13), a lower second dipole arm (14), a lower third dipole arm (15) and a lower fourth dipole arm (16);
the dielectric substrate (1) is rectangular; the microstrip feeder line (4) is rectangular, the lower boundary of the microstrip feeder line is aligned with the lower boundary of the dielectric substrate (1), and the vertical center line is aligned with the vertical center line of the dielectric substrate (1);
the upper connecting line (5) is rectangular and is connected with the microstrip feeder line (4), and the vertical center line of the upper connecting line is aligned with the vertical center line of the dielectric substrate (1); the upper first dipole arm (6), the upper second dipole arm (7), the upper third dipole arm (8) and the upper fourth dipole arm (9) are all S-shaped, the radian of bending is different, the length and the width are sequentially reduced, the tail end of the upper fourth dipole arm (9) is aligned with the tail end of the upper connecting wire (5), and the dipole arms are alternately and sequentially connected to the two sides of the connecting wire upwards; the shaping director (10) is of a bilateral symmetry structure and is formed by alternately connecting circular arcs and straight line segments, and a symmetry axis is aligned with a vertical center line of the medium substrate (1); is arranged above the upper layer fourth dipole arm (9);
the grounding structure (11) is of a bilateral symmetry structure, the outer boundary is coincident with the boundary of the medium substrate (1), and the inner boundary is arc-shaped;
the lower connecting line (12) is rectangular and is connected with the grounding structure (11), and the vertical center line of the lower connecting line is aligned with the vertical center line of the dielectric substrate (1); the lower first dipole arms (13), the lower second dipole arms (14), the lower third dipole arms (15) and the lower fourth dipole arms (16) are S-shaped, the radians of bending are different, the length and the width are sequentially reduced, the tail ends of the lower fourth dipole arms (16) are aligned with the tail ends of the lower connecting lines (12), and the dipole arms are alternately and sequentially connected to the two sides of the connecting lines (12) upwards;
the upper first dipole arm (6) and the lower first dipole arm (13), the upper second dipole arm (7) and the lower second dipole arm (14), the upper third dipole arm (8) and the lower third dipole arm (15), the upper fourth dipole arm (9) and the lower fourth dipole arm (16) have the same structures, and are respectively positioned at the same height on the medium substrate (1);
the dielectric substrate (1) is Rogers RO4003C, has a relative dielectric constant of 3.55, a loss tangent of 0.0027 and a thickness of 0.508mm;
all dipole arms and connecting wires form a dipole array as a radiation unit; the dipole arms are shaped to improve the antenna gain; the grounding structure (11) is used as a reflector to enhance directivity; the shape director (10) further enhances directivity and increases gain.
2. The shaped planar log-log periodic antenna according to claim 1, wherein the first metal structure (2) and the second metal structure (3) are made of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479491.5A CN110265777B (en) | 2019-06-04 | 2019-06-04 | Shaped plane yagi log periodic antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479491.5A CN110265777B (en) | 2019-06-04 | 2019-06-04 | Shaped plane yagi log periodic antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110265777A CN110265777A (en) | 2019-09-20 |
| CN110265777B true CN110265777B (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910479491.5A Active CN110265777B (en) | 2019-06-04 | 2019-06-04 | Shaped plane yagi log periodic antenna |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490338U (en) * | 2009-09-08 | 2010-05-26 | 泉州佳信天线有限公司 | Novel wide-band digital television receiving antenna |
| CN105576362A (en) * | 2015-12-25 | 2016-05-11 | 哈尔滨工业大学（威海） | Miniature broadband antenna device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100790138B1 (en) * | 2006-02-07 | 2008-01-02 | 삼성전자주식회사 | Wideband Logic Cycle Dipole Array Antenna |
| US20170237174A1 (en) * | 2016-02-12 | 2017-08-17 | Netgear, Inc. | Broad Band Diversity Antenna System |
| CN209913030U (en) * | 2019-06-04 | 2020-01-07 | 华东师范大学 | Shaped plane yagi log periodic antenna |
-
2019
- 2019-06-04 CN CN201910479491.5A patent/CN110265777B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490338U (en) * | 2009-09-08 | 2010-05-26 | 泉州佳信天线有限公司 | Novel wide-band digital television receiving antenna |
| CN105576362A (en) * | 2015-12-25 | 2016-05-11 | 哈尔滨工业大学（威海） | Miniature broadband antenna device |
Non-Patent Citations (2)
| Title |
|---|
| A CPW-SIW Filter With Wide Stopband Performance Using Grounded Metallic Vias;Bo Shi;TENCON 2018 - 2018 IEEE Region 10 Conference;全文 * |
| 基于超表面的天线增强和多功能器件的设计;王茜;中国优秀硕士学位论文全文数据库;全文 * |
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| CN110265777A (en) | 2019-09-20 |
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