CN105703069A - CPW (Co-Planar Waveguide) and tapered transmission line feeding wide band planar quari-Yagi antenna - Google Patents
CPW (Co-Planar Waveguide) and tapered transmission line feeding wide band planar quari-Yagi antenna Download PDFInfo
- Publication number
- CN105703069A CN105703069A CN201610191218.9A CN201610191218A CN105703069A CN 105703069 A CN105703069 A CN 105703069A CN 201610191218 A CN201610191218 A CN 201610191218A CN 105703069 A CN105703069 A CN 105703069A
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- cpw
- tapered transmission
- antenna
- planar
- 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
- 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
-
- 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
- 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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Abstract
The invention discloses a CPW (Co-Planar Waveguide) and tapered transmission line feeding wide band planar quari-Yagi antenna which comprises a PCB (Printed Circuit Board) substrate 1 without a floor layer and a feeder and antenna structure etched on a copper foil on one surface of a PCB. The feeder and antenna structure comprises an end-fire SMA (Shape Memory Alloy) 2, a CPW structure 3 and a CPW structure floor 4 which are mounted and welded below the PCB substrate, a tapered transmission line 5, an exciter 6, a first director 7 and a second director 8. According to the invention, adjustable means and design flexibility are provided for implementation of the wide band planar quari-Yagi antenna; facts prove that effects generated by using the tapered transmission line are very good; and the CPW and tapered transmission line feeding wide band planar quari-Yagi antenna has the characteristics of wide band, a certain gain, miniaturization, easiness for planar integration and the like.
Description
Technical field
The invention belongs to antenna and microwave technical field, particularly to the quasi-Yagi antenna of broadband planar that a kind of CPW and tapered transmission lines feed, it is possible to be applied to the fields such as the medical science radar of X-band, artificial electromagnetic medium development and sensing measurement。
Background technology
In the application such as X-band medical science radar, the development of artificial electromagnetic medium and sensing measurement, it is necessary to gain a kind of broadband, certain and the planar antenna being easily integrated。
Electromagnetic horn, log-periodic antenna etc., have a superperformance such as broadband, high-gain, but owing to antenna is three dimensional structure or the reason such as size is long, is not suitable for Planar integration。
Plane single pole sub antenna, has broadband, miniaturization and is prone to the characteristics such as Planar integration, but antenna gain is generally relatively low。
UWB antenna, has ultra broadband, miniaturization and is prone to the characteristics such as Planar integration, but antenna gain is also lower than plane single pole sub antenna。
Yagi antenna is the antenna type that a class is important, has a wide range of applications, and relates to feeding classification and realize structure, activator, director and emitter etc. efficiently in planar circuit designs。
Plane Yagi antenna is referred to as the Yagi antenna that is as the criterion。The feeding classification of quasi-Yagi antenna has two kinds: microstrip type and CPW (co-planar waveguide) type。The quasi-Yagi antenna of microstrip type, relates to power splitter and 180 ° of phase shifter design, and feeder line structure size is also relatively larger, and its lateral dimension is even greater than the length of Yagi antenna excitation device。
The quasi-Yagi antenna of CPW type, because TEM mould needs from CPW patten transformation to be coupled transfer ray mode, CPW floor panel structure sudden change simultaneously also converts for TEM mode and adds discontinuity, to be finally converted into the radiation spherical wave of Yagi antenna。
Summary of the invention
It is an object of the invention to the shortcoming overcoming prior art with not enough, it is provided that the quasi-Yagi antenna of broadband planar of a kind of CPW and tapered transmission lines feed。
The purpose of the present invention is achieved through the following technical solutions: the quasi-Yagi antenna of broadband planar of a kind of CPW and tapered transmission lines feed, including there is no the PCB substrate 1 of floor layer and being etched in the feeder line on a Copper Foil of PCB and antenna structure, described feeder line and antenna structure include erecting and welding end-fire type SMA2 below described PCB substrate, CPW structure 3 and CPW structural flooring 4, and tapered transmission lines 5 and activator the 6, first director 7 and the second director 8。
The match specifications of described CPW structure 3 size and end-fire type SMA, the middle conduction band of CPW structure 3 described in described CPW structural flooring 4 sandwich。
Described tapered transmission lines 5, one end connects CPW structural flooring 4, other end connects two radiating doublet unit of activator 6, gap in the middle of described tapered transmission lines is to adopt trapezoidal connected mode, open to activator direction with an angle, conduction band contour structures is constant, and the ratio of two end gap widths is 2.5:1。
The present invention compared with prior art, has the advantage that and beneficial effect:
Once after PCB and SMA model determines, the tuning space of plane quasi-Yagi antenna structure is only small。Under the gap size of activator feed end restricts, end-fire type SMA structure determines CPW structure substantially, and the discontinuity sudden change that the end of CPW structure is structurally is unavoidable, the TEM mould of transmission line is converted into aerial radiation spherical wave, is subjected to the physical constraints of above physical dimension。Therefore, the realization that the present invention is broadband planar type quasi-Yagi antenna provides adjustable means and design flexibility, and it is good that the fact also demonstrates the effect using tapered transmission lines, has broadband, certain gain, miniaturization and is prone to the characteristics such as Planar integration。
Accompanying drawing explanation
Fig. 1 is CPW of the present invention and the quasi-Yagi antenna assumption diagram of broadband planar type of tapered transmission lines feed；
Fig. 2 is the SMA installation site schematic diagram of the CPW feed of antenna described in Fig. 1；
Fig. 3 is antenna and the feeder line structure figure of antenna described in Fig. 1；
Fig. 4 is the S11 parameter schematic diagram of antenna described in Fig. 1。
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this。
In the quasi-Yagi antenna structure of plane as shown in Figure 1, the SMA installation site of CPW feed and PCB size are as in figure 2 it is shown, wherein:
The product type that microwave material PCB substrate 1 is selected is the ceramics filled polytetrafluoroethylene glass cloth coated copper foil plate F4BT-1/2 of Taizhou City Wangling Insulating Materials Plant, and thickness is 1mm, and dielectric constant is 6.0, and tangent loss is 0.001, and copper foil plate copper thickness is 35 μm。The length and width of PCB substrate 1 is 28mmX28.2mm。PCB substrate 1 does not have floor layer, feeder line and antenna to be all etched on a Copper Foil of PCB。
That end-fire type SMA selects is JohnsonEndLaunchConnector, and product type is No.142-0791-811, and this model is applicable to the PCB that 1mm is thick, and erecting and welding is in the position shown in 2。
Fig. 3 is the quasi-Yagi antenna of plane and feeder line structure, including:
3 is CPW structure, and the match specifications of its size and end-fire type SMA, the middle conduction band width of CPW is 2mm, and gap is 0.5mm。
4 is the floor of CPW structure, height 5.69mm, width respectively 10.6mm and the 12.6mm on two floors, limit。
5 is tapered transmission lines, and one end connects CPW structure 4, and other end connects two radiating doublet unit of activator 6, and length is 11.69mm。Tapered transmission lines, middle gap is to adopt trapezoidal connected mode, opens to activator direction low-angle (being approximately 3.6 °), and conduction band contour structures is constant, and the ratio of two end gap widths is 2.5:1。
6 is activator, and 7 is 8 is two directors, and size and position are as shown in Figure 3。As shown in Figure 4, at best working frequency range, this antenna gain can reach about 6.5dB。
Above-described embodiment is the present invention preferably embodiment; but embodiments of the present invention are also not restricted to the described embodiments; the change made under other any spirit without departing from the present invention and principle, modification, replacement, combination, simplification; all should be the substitute mode of equivalence, be included within protection scope of the present invention。
Claims (3)
1. the quasi-Yagi antenna of broadband planar of a CPW and tapered transmission lines feed, it is characterized in that including not having the PCB substrate (1) of floor layer and being etched in the feeder line on a Copper Foil of PCB and antenna structure, described feeder line and antenna structure include erecting and welding end-fire type SMA (2) below described PCB substrate, CPW structure (3) and CPW structural flooring (4), and tapered transmission lines (5) and activator (6), the first director (7) and the second director (8)。
2. the quasi-Yagi antenna of broadband planar type of CPW according to claim 1 and tapered transmission lines feed, it is characterized in that the match specifications of described CPW structure (3) size and end-fire type SMA, the middle conduction band of CPW structure (3) described in described CPW structural flooring (4) sandwich。
3. the quasi-Yagi antenna of broadband planar type of CPW according to claim 1 and tapered transmission lines feed, it is characterized in that described tapered transmission lines (5), one end connects CPW structural flooring (4), other end connects two radiating doublet unit of activator (6), gap in the middle of described tapered transmission lines is to adopt trapezoidal connected mode, opening to activator direction with an angle, conduction band contour structures is constant, and the ratio of two end gap widths is 2.5:1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610191218.9A CN105703069A (en) | 2016-03-30 | 2016-03-30 | CPW (Co-Planar Waveguide) and tapered transmission line feeding wide band planar quari-Yagi antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610191218.9A CN105703069A (en) | 2016-03-30 | 2016-03-30 | CPW (Co-Planar Waveguide) and tapered transmission line feeding wide band planar quari-Yagi antenna |
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| Publication Number | Publication Date |
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| CN105703069A true CN105703069A (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610191218.9A Pending CN105703069A (en) | 2016-03-30 | 2016-03-30 | CPW (Co-Planar Waveguide) and tapered transmission line feeding wide band planar quari-Yagi antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108376828A (en) * | 2018-01-25 | 2018-08-07 | 瑞声科技（南京）有限公司 | Antenna system and mobile terminal |
Citations (5)
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|---|---|---|---|---|
| KR20100106878A (en) * | 2009-03-24 | 2010-10-04 | 아주대학교산학협력단 | Yagi-uda antenna having cps feed line |
| CN103811876A (en) * | 2014-02-26 | 2014-05-21 | 中国工程物理研究院电子工程研究所 | Chip-medium filling horn antenna applied to terahertz wave band phase array |
| CN105140656A (en) * | 2015-08-10 | 2015-12-09 | 哈尔滨工业大学 | Novel high-gain printed quasi-yagi antenna |
| CN105305054A (en) * | 2015-11-20 | 2016-02-03 | 吉林医药学院 | Dual-ellipse combined monopole antenna with gradual change coplanar waveguide feed |
| CN205723936U (en) * | 2016-03-30 | 2016-11-23 | 广东工业大学 | A kind of CPW and the broadband planar quasi-Yagi antenna of tapered transmission lines feed |
-
2016
- 2016-03-30 CN CN201610191218.9A patent/CN105703069A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100106878A (en) * | 2009-03-24 | 2010-10-04 | 아주대학교산학협력단 | Yagi-uda antenna having cps feed line |
| CN103811876A (en) * | 2014-02-26 | 2014-05-21 | 中国工程物理研究院电子工程研究所 | Chip-medium filling horn antenna applied to terahertz wave band phase array |
| CN105140656A (en) * | 2015-08-10 | 2015-12-09 | 哈尔滨工业大学 | Novel high-gain printed quasi-yagi antenna |
| CN105305054A (en) * | 2015-11-20 | 2016-02-03 | 吉林医药学院 | Dual-ellipse combined monopole antenna with gradual change coplanar waveguide feed |
| CN205723936U (en) * | 2016-03-30 | 2016-11-23 | 广东工业大学 | A kind of CPW and the broadband planar quasi-Yagi antenna of tapered transmission lines feed |
Non-Patent Citations (2)
| Title |
|---|
| H. K. KAN.ET AL: "Simple Broadband Planar CPW-Fed Quasi-Yagi Antenna", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
| SON XUAT TA.ET AL: "A Wideband Double Dipole Quasi-Yagi Antenna Using a Microstrip-slotline Transition Feed", 《2012 IEEE INTERNATIONAL WORKSHOP ON ANTENNA TECHNOLOGY (IWAT)》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108376828A (en) * | 2018-01-25 | 2018-08-07 | 瑞声科技（南京）有限公司 | Antenna system and mobile terminal |
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