CN106785482B - Miniaturized quasi-yagi antenna based on reflector deformation structure - Google Patents
Miniaturized quasi-yagi antenna based on reflector deformation structure Download PDFInfo
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- CN106785482B CN106785482B CN201710006687.3A CN201710006687A CN106785482B CN 106785482 B CN106785482 B CN 106785482B CN 201710006687 A CN201710006687 A CN 201710006687A CN 106785482 B CN106785482 B CN 106785482B
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- 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
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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
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
Abstract
A miniaturized quasi-yagi antenna based on a reflector deformation structure comprises a dielectric substrate, an antenna feeder line, a balanced balun, a differential mode feed circuit, a coplanar strip line, a feed source oscillator, a director and a grounding piece; one end of the antenna feeder line is connected with an antenna port, and the other end of the antenna feeder line is connected with one end of the balance balun; the other end of the balanced balun is connected with one end of the differential mode feed circuit, and the antenna feeder line and the balanced balun are horizontally arranged on one side of one end of the dielectric substrate in parallel; the other end of the differential mode feed circuit is connected with one end of the coplanar strip line; the feed source vibrator is horizontally arranged in the middle of the dielectric substrate, and the source end of the feed source vibrator is connected with the other end of the coplanar strip line; the director is horizontally arranged at the other end of the medium substrate; the two sides of the grounding piece are respectively connected with a first metal strip and a second metal strip. The invention realizes the miniaturization of the yagi antenna by reducing the longitudinal length and the transverse length, so that the antenna structure is more compact, and good electrical performance characteristics can be ensured.
Description
Technical Field
The invention relates to the field of yagi antennas, in particular to a miniaturized quasi-yagi antenna based on a reflector deformation structure.
Background
Yagi-Uda Antenna is a conventional Antenna, has good directivity, has higher gain than a dipole Antenna, and is applicable to the fields of direction finding, remote communication and the like. However, the conventional yagi antenna is a three-dimensional antenna, and thus has a large volume and is difficult to integrate with a microwave circuit. In 1998, a research group led by professor Itoh in los angeles division, university of california skillfully introduced yagi antenna technology onto a Printed Circuit Board (PCB), and realized the functions of a director, a feed element and a reflector by using a printed element and a ground plate, reducing the size of the conventional yagi antenna. Meanwhile, the 1/4 wavelength converter, the balanced balun, the differential mode feed and other technologies are adopted on the Antenna structure, the narrow-band problem in the traditional Yagi Antenna is solved, the Antenna becomes an international research hotspot, and the Antenna is named as a Quasi-Yagi-Uda Antenna (Quasi Yagi-Uda Antenna). Subsequent work has been directed primarily around further broadening of bandwidth to achieve broadband, multi-band and quasi-yagi antenna arrays, and has yielded good research results.
As shown in figure 1, the conventional quasi-yagi antenna is composed of a reflector, a feed element and a director, and the total length Ldri of the feed element is about (0.45-0.48) lambda when viewed from the transverse dimension 0 ，λ 0 For radiating free space wavelengths of the signal, the length Lref of the reflector is slightly longer than that of the feed oscillator, and the director is slightly shorter than that of the feed oscillator, so that the transverse length is slightly longer than 0.5 lambda 0 (ii) a The reflector and feed oscillator spacing Sref is about 0.2 lambda from longitudinal length analysis 0 The distance Sdir between the feed source oscillator and the director is 0.2 lambda 0 Thus, the size of a conventional ternary yagi antenna is about 0.5 λ 0 *0.4λ 0 。
Putting the above conclusion into the microstrip yagi antenna, as shown in fig. 2, the transverse dimensions of the elements such as the feed source oscillator and the like can be reduced to a certain extent due to the action of the medium, but the tail end of the antenna still needs to have a certain distance with the edge of the medium due to the influence of the medium-air boundary on the electromagnetic signal, so that the 0.5 lambda still adopted in general 0 The selected size of (2); in longitudinal direction, the feed source oscillator is connected with coplanar strip line, differential mode feed circuit and balun, the latter has the function of stabilizing bandwidth and length of about 0.25 lambda 0 . Meanwhile, the longitudinal dimension of the antenna microstrip feed line is about 0.5 lambda in total consideration of the length of the antenna microstrip feed line 0 The size of the antenna substrate is generally slightly larger than 0.5 lambda 0 . To achieve high gain, the size becomes larger, for example, by increasing the number of directors.
It can be known that the dimension of the ternary quasi-yagi antenna is 0.5 λ 0 *0.5λ 0 . By adopting the longitudinal layout, a considerable part of the longitudinal length of the antenna size is occupied by the balanced balun, so that the layout is looser and the whole antenna structure is large in volume in view of the whole structure of the quasi-yagi antenna.
Disclosure of Invention
The main object of the present invention is to overcome the above mentioned drawbacks of the prior art and to provide a miniaturized quasi-yagi antenna based on a deformed reflector structure, which is reduced in the longitudinal and transverse dimensions, respectively, and which ensures good electrical performance characteristics.
The invention adopts the following technical scheme:
a miniaturized quasi-yagi antenna based on a reflector deformation structure comprises a dielectric substrate, an antenna feeder line, a balanced balun, a differential mode feed circuit, a coplanar strip line, a feed source oscillator, a director and a grounding piece, wherein the antenna feeder line, the balanced balun, the differential mode feed circuit, the coplanar strip line, the feed source oscillator and the director are arranged on the front surface of the dielectric substrate; the method is characterized in that: one end of the antenna feeder line is connected with an antenna port, and the other end of the antenna feeder line is connected with one end of the balance balun; the other end of the balanced balun is connected with one end of the differential mode feed circuit, and the antenna feeder line and the balanced balun are horizontally arranged on one side of one end of the dielectric substrate in parallel; the other end of the differential mode feed circuit is connected with one end of the coplanar strip line, and the differential mode feed circuit is horizontally arranged on the other side of the end of the dielectric substrate; the feed source vibrator is horizontally arranged in the middle of the dielectric substrate, and the source end of the feed source vibrator is connected with the other end of the coplanar strip line; the director is horizontally arranged at the other end of the medium substrate; the grounding plate is also used as a reflector, and the two sides of the grounding plate are respectively connected with a first metal strip and a second metal strip so as to realize capacitive loading.
Preferably, the grounding plate is located at one end corresponding to the differential mode feed circuit, and the lengths of the first metal strip and the second metal strip are 0.049 lambda-0.062 lambda, wherein lambda is the free space wavelength of the radiation signal.
Preferably, the first metal strip and the second metal strip are I-shaped, Contraband-shaped, triangular or circular arc-shaped.
Preferably, the length of the grounding plate is 0.40 lambda-0.42 lambda.
Preferably, the relative dielectric constant of the dielectric substrate is in the range of 3-6.5.
Preferably, the feed element length is 0.25 lambda-0.27 lambda.
Preferably, the dielectric substrate has a length of 0.40 λ -0.42 λ and a width of 0.37 λ -0.40 λ.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
1. according to the yagi antenna, the balanced balun and the antenna feeder are transversely arranged to reduce the longitudinal length; and conveniently draw forth the metal strip in ground lug both sides, carry out the capacitive loading to the reflector promptly, reduce horizontal length to realize miniaturizing, make antenna structure more compact, can also ensure good electrical performance characteristic.
2. The shapes of the first metal strip and the second metal strip of the yagi antenna can be I-shaped, Contraband-shaped, triangular, circular arc or other polygons, and the like, and the yagi antenna has various shapes and can realize capacitive loading.
3. The yagi antenna adopts the dielectric substrate with higher dielectric constant, and can effectively reduce the lengths of the director, the feed source oscillator and the reflector.
Drawings
Fig. 1 is a schematic diagram of a conventional yagi antenna;
FIG. 2 is a schematic diagram of a conventional microstrip yagi antenna;
FIG. 3 is a view of the structure of a yagi antenna of the present invention (front side);
FIG. 4 is a view of the structure of the yagi antenna of the present invention (reverse side);
FIG. 5 is a view of the structure (side) of the yagi antenna of the present invention;
FIG. 6 is a diagram of the size of the yagi antenna of the present invention
FIG. 7 is a simulated 915MHz pattern (E-plane) of the present invention;
FIG. 8 is a simulated 915MHz pattern (E-plane) of the present invention;
FIG. 9 is a simulated 915MHz pattern (H-plane) of the present invention;
FIG. 10 is a simulated 915MHz pattern (H-plane) of the present invention;
FIG. 11 is a graph of simulated gain versus frequency curves of the present invention;
FIG. 12 is a graph of simulated standing wave versus frequency curves in accordance with the present invention;
wherein: 10. the antenna comprises a dielectric substrate, 11, a grounding piece, 12, a first metal strip, 13, a second metal strip, 20, a director, 30, a feed source oscillator, 40, a coplanar strip line, 50, a differential mode feed circuit, 60, a balanced balun, 70 and an antenna feed line.
Detailed Description
The invention is further described below by means of specific embodiments.
Referring to fig. 3 to 6, a quasi-yagi antenna based on a reflector deformation structure includes a dielectric substrate 10, an antenna feed line 70, a balanced balun 60, a differential mode feed circuit 50, a coplanar strip line 40, a feed oscillator 30, a director 20, and a ground strip 11, the antenna feed line, the balanced balun 60, the differential mode feed circuit 50, the coplanar strip line 40, the feed oscillator 30, the director 20, and the ground strip 11 are disposed on the back side of the dielectric substrate 10, the length of the dielectric substrate is 0.40 λ -0.42 λ, the width of the dielectric substrate is 0.37 λ -0.40 λ, and the relative dielectric constant of the dielectric substrate ranges from 3 to 6.5. The antenna feed line 70 is a microstrip line, one end of which is connected to the antenna port, and the other end of which is connected to one end of the balanced balun 60. The balanced balun 60 is a microstrip line, the other end of the balanced balun 60 is connected to one end of the differential mode feed circuit 50, and the antenna feed line 70 and the balanced balun 60 are horizontally arranged in parallel on one side of one end of the dielectric substrate 10; the other end of the differential mode feeding circuit 50 is connected to one end of the coplanar strip line 40, and the differential mode feeding circuit 50 is horizontally arranged on the other side of the end of the dielectric substrate 10, and the differential mode feeding circuit 50 is a microstrip line. That is, if the differential mode feeding circuit 50 is located on the right side of the dielectric substrate 10, the antenna feeding line 70 and the balanced balun 60 are located on the left side; the differential mode feed circuit 50 is located on the left side of the dielectric substrate 10 and the antenna feed line 70 and the balanced balun 60 are located on the right side of the dielectric substrate 10. The length of the balanced balun 60 is 1/4 of the guided wave wavelength. To ensure the stability of the input signal, the length of the antenna feed 70 is maintained at about 0.1 λ and the resistance is 50 Ω 0
The feed source vibrator 10 is a printed vibrator and is horizontally arranged in the middle of the dielectric substrate 10, the source end of the feed source vibrator 30 is connected with the other end of the coplanar strip line 40, and two radiation ends of the feed source vibrator 30 are at a certain distance from the edge of the dielectric substrate 10. The length of the feed oscillator is 0.25 lambda-0.27 lambda.
The director of the present invention is a printed vibrator that is horizontally disposed at the other end of the dielectric substrate. There is a margin between the director 20 and the edge of the dielectric substrate 10. The length of the director 20 is smaller than the length of the feed element 30.
The ground strip 11 on the opposite side of the dielectric substrate 10 also serves as a reflector, and the length of the ground strip 11 is 0.40 lambda-0.42 lambda and is located at the end corresponding to the differential mode feeding circuit 50. The two side edges of the grounding piece 11 are respectively connected with a first metal strip 12 and a second metal strip 13 to realize capacitive loading, the first metal strip 12 and the second metal strip 13 are also in central symmetry with respect to the dielectric substrate 10, and the length of the first metal strip 12 and the second metal strip 13 is 0.049 lambda-0.062 lambda. The capacitive loading principle is as follows: due to the arrangement of the first metal strip 12 and the second metal strip 13, the end of the reflector is extended, and the current can continuously flow along the end of the reflector, which is equivalent to the extension of the length of the reflector, so that capacitive loading is realized.
For sample test in a frequency band of 902MHZ to 928MHZ, a central frequency point 915MHZ is used for design, and the dimensions of relevant dimensions and distances of mutual position relations of the director 20, the feed source oscillator 30, the feed source oscillator feeder 50, the differential mode feed circuit 50, the balanced balun 60, the antenna feeder 70, the first metal strip 12, the second metal strip 13 and the like are shown in fig. 6, and the dimensions range is as follows: the length aa of the grounding strip 11 is 122mm-127mm, the length Ldir of the feed source oscillator is 78mm-82mm, the length Refy of the first metal strip and the second metal strip is 15mm-19mm, the length aa of the dielectric substrate is 122mm-127mm, and the width bb is 118mm-122 mm. Wherein the final optimization parameters are as follows:
the dielectric substrate 10 is made of epoxy resin or polytetrafluoroethylene, and has a substrate dielectric constant ∈ r of 6.15, a loss tangent of 0.0028, and a thickness h of 1.27 mm. The remaining dimensions are referenced in fig. 6 and the following table:
the size of the miniaturized quasi-yagi antenna is aa to 125mm, bb to 120mm, and slightly exceeds 1/3 of 915MHZ free space wavelength. Compared with the size of the original quasi-yagi antenna, the size of the antenna is reduced to about 1/3.
The model is simulated by HFSS software, and test results show that the model has excellent electrical performance in a frequency band of 902MHZ-928MHZ, and FIGS. 7 and 8 show a simulated 915MHz directional diagram (E surface) of the invention; FIGS. 9 and 10 show a 915MHz direction diagram (H plane) according to the present invention; referring to FIG. 12, a graph of standing wave coefficient versus frequency is shown; referring to fig. 11, a graph of gain versus angle is shown.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using this concept shall fall within the scope of the present invention.
Claims (7)
1. A small-sized quasi-yagi antenna based on a reflector deformation structure comprises a dielectric substrate, an antenna feeder line, a balanced balun, a differential mode feed circuit, a coplanar strip line, a feed source vibrator, a director and a grounding strip, wherein the antenna feeder line, the balanced balun, the differential mode feed circuit, the coplanar strip line, the feed source vibrator and the director are arranged on the front surface of the dielectric substrate; the method is characterized in that: one end of the antenna feeder line is connected with an antenna port, and the other end of the antenna feeder line is connected with one end of the balance balun; the other end of the balanced balun is connected with one end of the differential mode feed circuit, and the antenna feeder line and the balanced balun are horizontally arranged on one side of one end of the dielectric substrate in parallel; the other end of the differential mode feed circuit is connected with one end of the coplanar strip line, and the differential mode feed circuit is horizontally arranged on the other side of the end of the dielectric substrate; the feed source vibrator is horizontally arranged in the middle of the dielectric substrate, and the source end of the feed source vibrator is connected with the other end of the coplanar strip line; the director is horizontally arranged at the other end of the medium substrate; the grounding strip also serves as a reflector, and the two sides of the grounding strip are respectively connected with a first metal strip and a second metal strip so as to realize capacitive loading.
2. A miniaturized quasi-yagi antenna based on a deformed reflector structure as claimed in claim 1, wherein: the grounding piece is positioned at one end corresponding to the differential mode feed circuit, the lengths of the first metal strip and the second metal strip are 0.049 lambda-0.062 lambda, and the lambda is the free space wavelength of a radiation signal.
3. A miniaturized quasi-yagi antenna based on a deformed reflector structure as claimed in claim 1, wherein: the first metal strip and the second metal strip are I-shaped, Contraband-shaped, triangular or arc-shaped.
4. A miniaturized quasi-yagi antenna based on a deformed reflector structure as claimed in claim 1, wherein: the length of the grounding plate is 0.40 lambda-0.42 lambda.
5. A miniaturized quasi-yagi antenna based on a deformed reflector structure as claimed in claim 1, wherein: the relative dielectric constant of the dielectric substrate ranges from 3 to 6.5.
6. A miniaturized quasi-yagi antenna based on a deformed reflector structure as claimed in claim 1, wherein: the feed element length is 0.25 lambda-0.27 lambda.
7. A miniaturized quasi-yagi antenna based on a deformed reflector structure as claimed in claim 1, wherein: the dielectric substrate has a length of 0.40 lambda-0.42 lambda and a width of 0.37 lambda-0.40 lambda.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107275771A (en) * | 2017-06-14 | 2017-10-20 | 南京理工大学 | A kind of six unit micro-strip Quasi-Yagi antennas |
| CN109301461B (en) * | 2018-11-22 | 2024-03-08 | 华诺星空技术股份有限公司 | Miniaturized ultra-wideband planar yagi antenna |
| CN110247167A (en) * | 2019-05-30 | 2019-09-17 | 南通至晟微电子技术有限公司 | Millimeter-wave planar Quasi-Yagi antenna unit, array antenna and phased array antenna |
| ES2848735B2 (en) | 2021-02-12 | 2022-01-04 | Televes S A U | PRINTED ANTENNA FOR THE RECEPTION AND/OR TRANSMISSION OF RADIO FREQUENCY SIGNALS |
| CN113097709B (en) * | 2021-03-30 | 2022-05-24 | 华南理工大学 | High-selectivity plane filtering yagi antenna |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007097282A1 (en) * | 2006-02-23 | 2007-08-30 | Murata Manufacturing Co., Ltd. | Antenna device, array antenna, multisector antenna, and high frequency transceiver |
| CN102800950A (en) * | 2012-08-03 | 2012-11-28 | 电子科技大学 | Printed broadband terminal antenna |
| CN103531889A (en) * | 2013-09-30 | 2014-01-22 | 西安电子科技大学 | Small-sized broadband end-on-fire antenna |
| CN103956569A (en) * | 2014-04-23 | 2014-07-30 | 南通大学 | Differential Quasi-Yagi antenna with filtering function |
| KR20140102974A (en) * | 2013-02-15 | 2014-08-25 | 동서대학교산학협력단 | A broadband plannar Quasi-Yagi antenna |
| CN206349516U (en) * | 2017-01-05 | 2017-07-21 | 华侨大学 | A kind of miniaturization Quasi-Yagi antenna based on reflector distressed structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8144072B2 (en) * | 2009-08-04 | 2012-03-27 | Auden Techno Corp. | Multi-band antenna for notebook computer |
| US8558748B2 (en) * | 2009-10-19 | 2013-10-15 | Ralink Technology Corp. | Printed dual-band Yagi-Uda antenna and circular polarization antenna |
| US9397394B2 (en) * | 2014-05-06 | 2016-07-19 | Commsky Technologies, Inc. | Antenna arrays with modified Yagi antenna units |
-
2017
- 2017-01-05 CN CN201710006687.3A patent/CN106785482B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007097282A1 (en) * | 2006-02-23 | 2007-08-30 | Murata Manufacturing Co., Ltd. | Antenna device, array antenna, multisector antenna, and high frequency transceiver |
| CN102800950A (en) * | 2012-08-03 | 2012-11-28 | 电子科技大学 | Printed broadband terminal antenna |
| KR20140102974A (en) * | 2013-02-15 | 2014-08-25 | 동서대학교산학협력단 | A broadband plannar Quasi-Yagi antenna |
| CN103531889A (en) * | 2013-09-30 | 2014-01-22 | 西安电子科技大学 | Small-sized broadband end-on-fire antenna |
| CN103956569A (en) * | 2014-04-23 | 2014-07-30 | 南通大学 | Differential Quasi-Yagi antenna with filtering function |
| CN206349516U (en) * | 2017-01-05 | 2017-07-21 | 华侨大学 | A kind of miniaturization Quasi-Yagi antenna based on reflector distressed structure |
Non-Patent Citations (1)
| Title |
|---|
| A new quasi-Yagi antenna for planar active antenna arrays;W.R. Deal; N. Kaneda; J. Sor; Y. Qian; T. Itoh;《IEEE Transactions on Microwave Theory and Techniques》;20000630;第48卷(第6期);第910-917页 * |
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