CN2418592Y - 225-400 MHz double-polarization all-directional antenna - Google Patents
225-400 MHz double-polarization all-directional antenna Download PDFInfo
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- CN2418592Y CN2418592Y CN 00227046 CN00227046U CN2418592Y CN 2418592 Y CN2418592 Y CN 2418592Y CN 00227046 CN00227046 CN 00227046 CN 00227046 U CN00227046 U CN 00227046U CN 2418592 Y CN2418592 Y CN 2418592Y
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Abstract
The utility model provides a dual polarized omni-directional antenna with 225 MHz to 400 MHz. The voltage standing wave ratio is made to be as small as possible in order to obtain maximum gain of the antenna. Genetic algorithm is used for optimally designing a unit antenna with a sleeve barrel. Broadband antennae sleeve barrels are arranged in units to form an omni-directional horizontally polarized antenna. The utility model is provided with a reflecting plate, and a micro-band network is used for realizing the orthogonal matching of equiamplitude in-phase and equiamplitude anti-phase. The utility model uses pole male isolation to separate overlapped frequency spectrum, so as to reduce the multiple access interference of a CDMA relay team network system and improve the utilization ratio of the capacity and the frequency spectrum of a team network user.
Description
The utility model relates to a kind of relay networking antenna.It is applicable to that all meet the relay netting communication system of the employing linear polarization mode of 225～400MHz frequency range.
In frequency resource more and more nervous today, how to improve the key issue that the availability of frequency spectrum becomes the communications field.As the employed frequency bandwidth representative value of present television broadcasting is 500MHz, can only divide 12 channels by traditional single polarization mode in this frequency band.But then can divide 24 channels after adopting the orthogonal polarization technology.That is to say, same frequency spectrum is adopted different polarization modes (as horizontal polarization and perpendicular polarization, left-hand circular polarization and right-handed circular polarization), just can make overlapping frequency spectrum separately, to reach the purpose of channeling.
The cdma communication system is low with its signal density, the advantage that hidden performance is good and being favored, but its capacity is restricted because of the influence of code division multiple access.The direct sequency-code division multiple access system of asynchronous transmission particularly, its address is disturbed just very outstanding.It is reported that China is in the CDMA of 225～400MHz frequency range relay netting communication system at present, what zone center (or base station) used is the omnidirectional antenna of single linear polarization mode, does not possess the orthogonal polarization function.
In the television broadcasting of China (each department frequency range difference), some area adopts batwing antenna as horizontally-polarized antenna, but its Heavy Weight (surpassing 15Kg), and do not have the orthogonal polarization function equally.
Frequency range of the present utility model is 225～400MHz, and gain is better than 4dBi, and voltage standing wave ratio is less than 2.5, and power capacity is less than 100W, and weight is less than 10Kg.Can be simultaneously be used for receiving and transmitting in the mode of perpendicular polarization and horizontal polarization.According to recently in the international online retrieval terminal, utilize the DIALOG system to " US Government Research Report " and EI so far in 1970 so far in 1966, and domestic research report, data and publication etc. so far in 1966 are carried out computer search, all do not find the related data and the report of the vertical and horizontally polarized omnidirectional antenna relevant with the utility model.
The purpose of this utility model is to utilize polarization isolation, and overlapping frequency spectrum separately, the multiple access that reduces in the CDMA relay netting communication system disturbs, and improves the networking user capacity and the availability of frequency spectrum.
Implementation method of the present utility model is to adopt genetic algorithm, designs five secondary broadband sleeve monopole antennas earlier, and wherein a pair is made perpendicular polarization, and fourth officer by the mode of orthogonal row's battle array, is formed horizontally-polarized antenna in horizontal plane in addition.By little band matching network phase place, amplitude and the bandwidth etc. of vertical and horizontal polarization are mated then, make them reach optimum state in parameters such as the gain of vertical plane and horizontal plane, directivity, standing-wave ratios.
The utility model compared with prior art has following advantage:
Integrate perpendicular polarization and horizontal polarization, can be used for receiving and launching electromagnetic wave in the orthogonal polarization mode simultaneously;
Volume is little, gain is high.The batswing tab horizontally-polarized antenna weight of using in the broadcast TV channel surpasses 15Kg, and the utility model is no more than 10Kg;
Direction coefficient is good, and deviation in roundness is less than 1dB, and voltage standing wave ratio is less than 2.5.
In sum, the utility model can play polarization isolation, reduce the effect that multiple access disturbed and increased channel capacity in 225～400MHz frequency range.
The utility model as shown in the figure, Fig. 1 is the sleeve monopole antenna profile.Fig. 2 is dipole antenna row battle array structure chart.Among Fig. 1: 1-inner wire (radiant body) 2-sleeve (radiant body) 3-medium 4-distributing point 5-coaxial line 6-reflecting plate
Listed the size of the height and the reflecting surface of each element antenna among Fig. 2.During by illustrated dimensions, antenna gain is 4～5dBi.Along with the reflecting surface area increases, its gain also increases thereupon.
Performing step of the present utility model is described below:
Adopt Genetic Algorithm optimized design to go out 5 secondary broadband sleeve monopole (antenna) element antennas, make its gain maximum, the voltage standing wave ratio minimum; Make perpendicular polarization with an element antenna, make horizontal polarization with four element antennas; Make the little band matching network of fourth officer, wherein two pairs are given the fourth officer antenna feeds of coaxial row battle array in the horizontal plane, to satisfy the anti-phase and voltage standing wave ratio requirement of feed voltage constant amplitude; One secondary two groups of antenna feeds of giving vertical row battle array in the horizontal plane are to satisfy feed voltage constant amplitude, phase shift 90 degree and voltage standing wave ratio requirements; Two groups of antenna feeds of one secondary feedwater mean poleization and perpendicular polarization are to satisfy feed voltage constant amplitude and voltage standing wave ratio requirement; 5 slave antennas are carried out mutual vertical row battle array by shown in Figure 2; Monitor amplitude, the phase place of each element antenna with vector network analyzer, make its gain, direction coefficient by the method for adjustment to little band matching network, voltage standing wave ratio reaches optimum state.
Claims (2)
1. one kind with 225～400MHz dual-polarization omnidirectional antenna, it is characterized in that antenna described in the utility model comprises 5 subband sleeve monopole (antenna) unit, perpendicular polarization is made in one of them unit, horizontal polarization is made in four unit, each sleeve monopole (antenna) unit is a radiant body by (1) inner wire, (2) sleeve, and (3) are medium, and (4) are distributing point, (5) be coaxial line, (6) are formed for reflecting plate.
2. antenna according to claim 1, the structure that it is characterized in that antenna are bipolar row's battle array structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00227046 CN2418592Y (en) | 2000-01-06 | 2000-01-06 | 225-400 MHz double-polarization all-directional antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00227046 CN2418592Y (en) | 2000-01-06 | 2000-01-06 | 225-400 MHz double-polarization all-directional antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2418592Y true CN2418592Y (en) | 2001-02-07 |
Family
ID=33590755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00227046 Expired - Fee Related CN2418592Y (en) | 2000-01-06 | 2000-01-06 | 225-400 MHz double-polarization all-directional antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2418592Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332477C (en) * | 2004-03-25 | 2007-08-15 | 电子科技大学 | Wideband omnidirectional conic sleeve single-pole sub-antenna |
| CN106330223A (en) * | 2016-08-31 | 2017-01-11 | 成都九华圆通科技发展有限公司 | Radio monitoring and direction finding system with good electromagnetic compatibility |
| CN113016107A (en) * | 2018-06-27 | 2021-06-22 | 安费诺天线解决方案公司 | Four-port radiating element |
-
2000
- 2000-01-06 CN CN 00227046 patent/CN2418592Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332477C (en) * | 2004-03-25 | 2007-08-15 | 电子科技大学 | Wideband omnidirectional conic sleeve single-pole sub-antenna |
| CN106330223A (en) * | 2016-08-31 | 2017-01-11 | 成都九华圆通科技发展有限公司 | Radio monitoring and direction finding system with good electromagnetic compatibility |
| CN113016107A (en) * | 2018-06-27 | 2021-06-22 | 安费诺天线解决方案公司 | Four-port radiating element |
| EP3815179A4 (en) * | 2018-06-27 | 2022-03-30 | Amphenol Antenna Solutions, Inc. | Quad-port radiating element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |