CN205319312U - Circular polarization antenna - Google Patents
Circular polarization antenna Download PDFInfo
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- CN205319312U CN205319312U CN201521049452.5U CN201521049452U CN205319312U CN 205319312 U CN205319312 U CN 205319312U CN 201521049452 U CN201521049452 U CN 201521049452U CN 205319312 U CN205319312 U CN 205319312U
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Abstract
The utility model provides a circular polarization antenna, include from last radiation metal paster, medium base plate and metal stratum of arranging in proper order extremely down, radiation metal paster includes forms feed line structure and the microstrip feed line that a class is made plausible the structure, comprises two arc microstrip lines by four fan -shaped microstrip slice units, the rectangular channel has been seted up in handing -over department of adjacent fan -shaped microstrip slice unit, four fan -shaped microstrip slice units connect gradually, and the contained angle of each unit is 90 degrees, and the fan -shaped microstrip slice unit radius of opposite vertex is the same, and adjacent fan -shaped microstrip slice unit radius is different, article two, the arc microstrip line passes through the connection of microstrip feed line, two arc microstrip line symmetric distribution in both sides of class circle structure, the microstrip feed line includes first, two rectangular part, and the 2nd rectangular part lies in the rectangular channel. Through adjusting sectorial radius, make the mode electric current that forms two kinds of mutually orthogonals on the paster, the circular polarization mode encourages out. Article two, the extra filtering function of slice unit production is united to the arc microstrip line.
Description
Technical field
This utility model relates to the antenna used in microwave telecommunication system, particularly to a kind of circular polarized antenna with filter function.
Background technology
Recent years, the technology of microwave telecommunication system each side is obtained for the development of prosperity. There is multi-functional device, enjoy everybody concern because of the performance of its miniaturization that can realize circuit and improvement system.
In a wireless communication system, antenna and band filter are two separate devices. In most radio system, no matter being sender or recipient, band filter is usually located at the rear end of antenna, in order to filter extra signal. In traditional design, the two device couples together typically by the transmission line of 50 ohm. In the band limits that we need, the two device can not accomplish perfect coupling. Therefore, at certain frequency, transmission line is equivalent to a resonator thus causing interference. This section of transmission line not only weakens the performance of system, but also occupies space. Additionally, in the design of antenna, the pure property of polarization is an important problem. Except antenna itself, any electronic circuit all cannot eliminate undesirable cross polarization. One good Antenna Design should have the ability select main polarization signal and filter cross polarization.
Utility model content
The purpose of this utility model is in that to overcome in traditional wireless communication system scheme, the deficiency of antenna and wave filter separately design, and provides circular polarized antenna that is a kind of simple and reasonable for structure and that have filter function. This antenna can realize circular polarization characteristics and filter function simultaneously, reduces the volume of communication device, improves the performance of antenna.
For solving above-mentioned technical problem, the technical solution of the utility model is as follows:
A kind of circular polarized antenna, including radiation metal paster, medium substrate and the metal ground layer arranged successively from top to bottom;
Described radiation metal paster includes being formed a class circle structure, the feeder structure being made up of two arc-shaped micro-strip line B1, B2 and microstrip-fed line by four fan-shaped offset of microstrip patch unit A1, A2, A3, A4; The junction of adjacent fan-shaped offset of microstrip patch unit offers rectangular channel;
Wherein four fan-shaped offset of microstrip patch unit are sequentially connected with, and the angle of each fan-shaped offset of microstrip patch unit is 90 degree, and wherein that the fan-shaped offset of microstrip patch unit radius on top is identical, adjacent fan-shaped offset of microstrip patch unit radius is different;
Wherein two arc-shaped micro-strip line B1, B2 in feeder structure are connected by microstrip-fed line, and two arc-shaped micro-strip line B1, B2 are symmetrically distributed in class and justify the both sides of structure;
Microstrip-fed line includes the first rectangle part C1 and the second rectangle part C2, and wherein the second rectangle part C2 is positioned at rectangular channel.
Four be mutually linked, angle is the fan-shaped offset of microstrip patch unit of 90 degree, its specific configuration is that two fan-shaped radiuses to top are equal, and two adjacent fan-shaped radiuses are not etc. Thus having constructed a kind circle structure, there is the radius of two different lengths, realizing circular polarisation by regulating the length of radius and the difference between them. Because this circular polarized antenna is to be fed by the mode coupled, so having dug a rectangular channel in this class circle structure, in order to carry out couple feed with microstrip-fed line. In the middle of filter function, this class circle structure serves as the role of second order resonator.
Described microstrip-fed line is made up of two parts, and wherein the first rectangle part C1 connects signal source with active antenna, forms aperture-coupled in the rectangular channel of the second rectangle part C2 embedded category circle structure.
Preferably, gap is left between described second rectangle part C2 and class circle structure.
Preferably, described adjacent fan-shaped offset of microstrip patch unit A2, A3 junction offer rectangular channel; The clearance distance of the clearance distance of described arc-shaped micro-strip line B1 and fan-shaped offset of microstrip patch unit A2 and arc-shaped micro-strip line B2 and fan-shaped offset of microstrip patch unit A3 is all W5; And the width of two arc-shaped micro-strip line is all W4.
Preferably, described substrate is dielectric material, the prosperous spirit material that dielectric material adopts thickness to be 3mm, and its dielectric constant is 2.2; Described metal ground layer is the metal ground layer being paved with good conductor.
Antenna disclosed in this utility model, can realize circular polarization characteristics in 2.38GHz to 2.42GHz frequency range, and axle is about 1 percent seven than the bandwidth less than 3dB. S11 is less than-10dB in the frequency range of 2.34GHz to 2.53GHz, and bandwidth is about 8 percent; The 3db free transmission range of this antenna is 2.3GHz to 2.6GHz.
The beneficial effects of the utility model are as follows:
(1) the utility model proposes a kind of antenna with circular polarization characteristics and filter function, traditional circular polarized antenna and filtering device are united two into one, is very suitable for the application of wireless communication system.
(2) implement antenna disclosed in this utility model and can realize the circular polarization characteristics of antenna by regulating fan-shaped radius R1, R2 of class circle structure. And this antenna has the advantages that size is little, it may be achieved miniaturization, it is easy to integrated; This antenna uses planar microstrip structure, and simple in construction, cost is low.
Accompanying drawing explanation
Fig. 1 is this utility model embodiment side structure schematic diagram.
Fig. 2 is this utility model embodiment ground floor upper strata micro-strip overall structure schematic diagram.
Fig. 3 is emulation and the measurement result comparison diagram that this utility model embodiment represents the parameter axle ratio of circular polarization characteristics.
Fig. 4 is this utility model embodiment test result figure in 1GHz to 4GHz band limits antenna efficiency.
Fig. 5 is that this utility model embodiment surveys emulation and test result comparison diagram at 1GHz to 4GHz band limits antenna gain.
Fig. 6 is this utility model embodiment Comparative result figure in 1GHz to 4GHz band limits antenna S11 emulation and measurement.
Fig. 7 is that this utility model embodiment is at working frequency points 2.4GHz, X-Z plane, the comparison diagram of right-hand polarization radiation mode figure and left-handed polarization radiation mode figure emulation and measurement result.
Fig. 8 is that this utility model embodiment is at working frequency points 2.4GHz, Y-Z plane, the comparison diagram of right-hand polarization radiation mode figure and left-handed polarization radiation mode figure emulation and measurement result.
Detailed description of the invention
Accompanying drawing being merely cited for property explanation, it is impossible to be interpreted as the restriction to this patent; In order to the present embodiment is better described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof are likely to omission and will be understood by. Below in conjunction with drawings and Examples, the technical solution of the utility model is described further.
In conjunction with shown in Fig. 1 to Fig. 2, a kind of circular polarized antenna, including the radiation metal paster 101 arranged successively from top to bottom, medium substrate 102 and metal ground layer 103;
Described radiation metal paster 101 includes being formed a class circle structure 201, the feeder structure 202 being made up of two arc-shaped micro-strip line B1, B2 and microstrip-fed line 203 by four fan-shaped offset of microstrip patch unit A1, A2, A3, A4; The junction of adjacent fan-shaped offset of microstrip patch unit offers rectangular channel;
Wherein four fan-shaped offset of microstrip patch unit are sequentially connected with, and the angle of each fan-shaped offset of microstrip patch unit is 90 degree, and wherein that the fan-shaped offset of microstrip patch unit radius on top is identical, adjacent fan-shaped offset of microstrip patch unit radius is different;
Wherein two arc-shaped micro-strip line B1, B2 in feeder structure 202 are connected by microstrip-fed line 203, and two arc-shaped micro-strip line B1, B2 are symmetrically distributed in class and justify the both sides of structure 201;
Microstrip-fed line 203 includes the first rectangle part C1 and the second rectangle part C2, and wherein the second rectangle part C2 is positioned at rectangular channel.
The class circle structure of this antenna by four be mutually linked, angle is that the fan-shaped offset of microstrip patch unit of 90 degree forms. Wherein the fan-shaped offset of microstrip patch unit radius at diagonal angle is equal, and the radius of adjacent fan-shaped offset of microstrip patch unit is unequal. By regulating length and the difference of radius, formed micro-around structure, motivate pattern two kinds mutually orthogonal, finally give circularly polarised wave. In this case study on implementation, adjacent fan-shaped offset of microstrip patch unit radius is R1, R2, and wherein R1 length is the length of 23mm, R2 is 21.9mm. In this case study on implementation, what obtain is right-handed circular polarization pattern.
This circular polarized antenna, in the middle of filter function, the feeder structure 202 of two arc-shaped micro-strip line B1, B2 compositions is equivalent to single order resonator, and class circle structure is equivalent to second order resonator. In this case study on implementation, the length of arc-shaped micro-strip line B1, B2 is 20.8mm, and width is 0.8mm, and the clearance distance W5 from class circle structure is 0.5mm.
A kind of circular polarized antenna with filter function that the utility model proposes, adopts the mode of couple feed to feed. Therefore need to digging out rectangular channel in class circle structure, in this case study on implementation, the width W3 of rectangular channel is 1.5mm, and length is 5.5mm; It it is the gap width W6 sum between the length L2 of the second rectangle part C2 and itself and class circle structure.
This circular polarized antenna adopts the mode of couple feed line to feed, and feed line is made up of the first rectangle part C1 and second rectangle part C2 two parts. The length L1 of C1 part is 7mm, and width is 5mm. C2 part is length L2 is 5mm, and width W2 is 0.5mm. The distance W6 of the end distance-like circle structure of the second rectangle part C2 is 0.5mm.
In the present embodiment, the sheet material of medium substrate is prosperous spirit sheet material, and dielectric constant is 2.2, and thickness is 3mm. Described metal ground layer 103 is the metal ground layer being paved with good conductor.
With reference to Fig. 3, the result according to analogous diagram and test figure, can learning that this antenna is in 2.38GHz to 2.42GHz frequency range, axle ratio is less than 3dB, and therefore antenna achieves circular polarisation in this frequency range.
Fig. 4 is this utility model embodiment test result figure in 1GHz to 4GHz band limits antenna efficiency.
With reference to Fig. 5, the result according to analogous diagram and test figure, can learning that the gain in bandpass range of this antenna has good flatness, outside bandpass range, it is very fast that gain declines, and therefore antenna has good filtering characteristic.
With reference to Fig. 6, the result according to analogous diagram and test figure, can learn in the frequency range of 2.34GHz to 2.53GHz, the S11 of antenna, less than-10dB, has good impedance matching.
With reference to Fig. 7,8, according to analogous diagram and test figure result, right-handed circular polarization has good radiation mode figure, and left-hand circular polarization is inhibited, and therefore the design antenna is a right-handed circular polarization antenna.
Above-mentioned all results all baseplate material be prosperous spirit sheet material, dielectric constant is 2.2, the thickness of medium substrate be 2mm true environment under by Network Analyzer and microwave dark room test obtain. By testing and the contrast of emulation, can the goodness of fit knowing test curve and simulation curve higher, it was shown that this programme practical.
It is above being discussed in detail a kind of provided embodiment of antenna design with circular polarization characteristics and filter function of this utility model. Having used specific case that principle of the present utility model and embodiment are illustrated herein, the explanation of above example is only intended to help to understand method of the present utility model and core concept thereof.
For one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, to sum up, this specification content should not be construed as restriction of the present utility model.
Claims (4)
1. a circular polarized antenna, it is characterised in that include radiation metal paster (101), medium substrate (102) and the metal ground layer (103) arranged successively from top to bottom;
Described radiation metal paster (101) includes being formed class circle structure (201), the feeder structure (202) being made up of two arc-shaped micro-strip line B1, B2 and microstrip-fed line (203) by four fan-shaped offset of microstrip patch unit A1, A2, A3, A4; The junction of adjacent fan-shaped offset of microstrip patch unit offers rectangular channel;
Wherein four fan-shaped offset of microstrip patch unit are sequentially connected with, and the angle of each fan-shaped offset of microstrip patch unit is 90 degree, and wherein that the fan-shaped offset of microstrip patch unit radius on top is identical, adjacent fan-shaped offset of microstrip patch unit radius is different;
Wherein two arc-shaped micro-strip line B1, B2 in feeder structure (202) are connected by microstrip-fed line (203), and two arc-shaped micro-strip line B1, B2 are symmetrically distributed in class and justify the both sides of structure (201);
Microstrip-fed line (203) includes the first rectangle part C1 and the second rectangle part C2, and wherein the second rectangle part C2 is positioned at rectangular channel.
2. circular polarized antenna according to claim 1, it is characterised in that leave gap between described second rectangle part C2 and class circle structure (201).
3. circular polarized antenna according to claim 2, it is characterised in that described adjacent fan-shaped offset of microstrip patch unit A2, A3 junction offer rectangular channel; The clearance distance of the clearance distance of described arc-shaped micro-strip line B1 and fan-shaped offset of microstrip patch unit A2 and arc-shaped micro-strip line B2 and fan-shaped offset of microstrip patch unit A3 is all W5; And the width of two arc-shaped micro-strip line is all W4.
4. circular polarized antenna according to claim 3, it is characterised in that described metal ground layer (103) is the metal ground layer being paved with good conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521049452.5U CN205319312U (en) | 2015-12-15 | 2015-12-15 | Circular polarization antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521049452.5U CN205319312U (en) | 2015-12-15 | 2015-12-15 | Circular polarization antenna |
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| CN205319312U true CN205319312U (en) | 2016-06-15 |
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| CN201521049452.5U Active CN205319312U (en) | 2015-12-15 | 2015-12-15 | Circular polarization antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450778A (en) * | 2016-11-30 | 2017-02-22 | 中山大学 | Broadband circular polarization DRA and design method thereof |
| CN107425276A (en) * | 2017-07-21 | 2017-12-01 | 西安交通大学 | A kind of circular polarisation slot antenna with filtering characteristic |
-
2015
- 2015-12-15 CN CN201521049452.5U patent/CN205319312U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450778A (en) * | 2016-11-30 | 2017-02-22 | 中山大学 | Broadband circular polarization DRA and design method thereof |
| CN106450778B (en) * | 2016-11-30 | 2019-09-20 | 中山大学 | A kind of broadband circle polarized DRA and its design method |
| CN107425276A (en) * | 2017-07-21 | 2017-12-01 | 西安交通大学 | A kind of circular polarisation slot antenna with filtering characteristic |
| CN107425276B (en) * | 2017-07-21 | 2020-03-31 | 西安交通大学 | Circularly polarized slot antenna with filtering characteristic |
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