CN201051537Y - FM round polarization dipole antenna - Google Patents
FM round polarization dipole antenna Download PDFInfo
- Publication number
- CN201051537Y CN201051537Y CNU2007201699184U CN200720169918U CN201051537Y CN 201051537 Y CN201051537 Y CN 201051537Y CN U2007201699184 U CNU2007201699184 U CN U2007201699184U CN 200720169918 U CN200720169918 U CN 200720169918U CN 201051537 Y CN201051537 Y CN 201051537Y
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- circular polarization
- bipolar plate
- pairs
- plate antenna
- antenna
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Abstract
The utility model discloses an FM circular polarization dipolar board antenna. The FM transmitting antenna comprises two pairs of symmetric vibrators on a cramp bar, each pair of symmetric vibrators are collinear distributed on two sides of the cramp bar, the two pairs of symmetric vibrators are mutually crossed, and feed phase difference exists among the symmetric vibrators. The optimized project is that the two pairs of symmetric vibrators have an angle of crossing of 80-180 degrees, an optimized angle of crossing of 90 degrees, a feed phase difference among the symmetric vibrators of 80-100 degrees and an optimized feed phase difference of 90 degrees. The FM transmitting antenna provided by the utility model can resolve the technical question that receiving effect is not ideal because of depolarizing mode mismatching, can transmit circular polarization polarized wave, can match receiving antennas of various depolarizing modes, meets various receiving modes and enables receiving effect to achieve optimization, with very simple and convenient overall structure of the antenna, which is convenient for assembling.
Description
Technical field
The utility model is relevant for transmitting antenna, particularly relevant for a kind of FM circular polarization bipolar plate antenna.
Background technology
At present, FM transmission antenna mainly contains horizontal polarization type antenna and perpendicular polarization type antenna.So-called horizontal polarization mode be meant that the electric field intensity of polarized wave is parallel to the ground, and the perpendicular polarization mode refers to that then electric field intensity is perpendicular to the ground.As everyone knows, if when the incoming wave polarization mode of the polarization mode of reception antenna and transmission antennas transmit does not match, received power will have loss.For example, the horizontal polarized wave that horizontal polarization type transmitting antenna is launched, when reception antenna also was horizontal polarization type antenna, polarization loss was zero, the signal that reception antenna is accepted is the strongest; Otherwise if during reception antenna perpendicular polarization type antenna, signal is the most weak.And it is current, FM transmission antenna or be horizontal polarization mode, be the perpendicular polarization mode, the direction of polarized wave electric field intensity is fixed, therefore, for the terminal reception antenna that the polarization mode of received signal is determined, need the user constantly to adjust the bearing of trend of reception antenna, just can receive stronger signal, particularly at for example vehicle-mounted receiving terminal of multiple receiving terminal antenna of modern times, radio broadcasting broadcast receiver etc., when needing in order to obtain stronger signal constantly to adjust antenna direction, with unusual inconvenience and also be not easy to realize adjusting at any time, reception is undesirable.
The utility model content
Technical problem to be solved in the utility model provides a kind of FM circular polarization bipolar plate antenna, can not solve owing to polarization mode matches and cause the unfavorable technical problem of acceptable effect, can launch the polarized wave of circular polarization, can be complementary with the reception antenna of various polarization modes, satisfy multiple receive mode, make reception reach optimization, and the antenna overall structure is very simple, light, is convenient to install.
A kind of FM circular polarization bipolar plate antenna provided by the utility model comprises two pairs of symmetrical dipoles that are located on the support bar, and described every pair of oscillator is the both sides that conllinear is distributed in support bar, and two pairs of oscillators intersect mutually, and it is poor to have current feed phase between each oscillator.
Preferred scheme, the crossing angle between described two pairs of oscillators are 80～100 degree, and best crossing angle is 90 degree.
Preferred scheme, the current feed phase difference between described each oscillator are 80～100 degree, and best current feed phase difference is 90 degree.
Preferred scheme, the infall that is positioned at two pairs of oscillators at support bar is provided with the protective cover of being made by insulating material, and this protective cover can protect the antenna internal structure to avoid extraneous boisterous influence.Wherein, described insulating material is insulating material such as fiberglass (glass fibre) or engineering plastics, and engineering plastics for example are polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene copolymer (ABS), polystyrene (PS) etc.
Preferred scheme is provided with firm banking in the support bar bottom, and firm banking is provided with most fixing holes that place for retaining element, is provided with reflecting plate below support bar, and described reflecting plate is located at the bottom of firm banking.Can make the entire antenna simple installation, and firm position.
Preferred scheme is provided with short-circuit piece on support bar, described circuit board is electrically connected with reflecting plate.Therefore, can constitute earth connection by reflecting plate, the energy DC earthing, anti-lightning strike effective.
According to such scheme, the utility model is with respect to existing transmitting antenna, and effect is significant, has following beneficial technical effects:
One, FM circular polarization bipolar plate antenna of the present utility model, can work in FM broadcasting section 87MHz～108MHz, characteristics with full frequency band, can satisfy the requirement of the shared common antenna of multi-transmitter, and power output is big, two pairs of oscillators of the FM circular polarization bipolar plate antenna that the utility model provides are intersection and distribute, poor by the current feed phase between each oscillator of control again, can make the electric field intensity sub-circular of antenna, particularly at two pairs of oscillators, 90 degree quadratures, and the current feed phase difference is 90 when spending, can make the circular polarization effect of electric field reach optimum state, can be complementary, can satisfy multiple receive mode with the reception antenna of various polarization modes, make reception reach optimization, can not solve owing to polarization mode matches and cause the unfavorable technical problem of acceptable effect.
Two, the FM circular polarization bipolar plate antenna that provides of the utility model, the weight of each element is little, and is light relatively, makes overall structure also very simple, light, is convenient to install.
Three, the FM circular polarization bipolar plate antenna that provides of the utility model, the firm banking and the reflecting plate of support bar fix, and can not only make installation easier, locate more firmly, and reflecting plate also can constitute earth connection, but DC earthing is anti-lightning strike effective.
Description of drawings
Fig. 1 is the end view of the utility model embodiment 1.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is level field shape (Radiation Patterns) schematic diagram of FM circular polarization bipolar plate antenna of the present utility model in centre frequency (mid-band).
Embodiment
As shown in Figure 1, 2, 3, a kind of FM circular polarization bipolar plate antenna that the utility model provides, comprise two pairs of symmetrical dipoles 1 that are located on the support bar 5, described support bar 5 can be combined by four rod members 51, can proof strength can alleviate the antenna overall weight again, lower side at support bar 5 is provided with delivery 4, is used for each oscillator 1 is carried out feed; Described every pair of oscillator 1 is the both sides that conllinear is distributed in support bar 5, and two pairs of oscillators intersect mutually, and crossing angle is 80～100 degree, and best crossing angle is 90 degree; Control that to have current feed phase between each oscillator 1 poor, the current feed phase difference between each oscillator is 80～100 degree, and best current feed phase difference is 90 degree, according to this scheme, FM circular polarization bipolar plate antenna of the present utility model can be launched circularly polarised wave, can satisfy various receive modes, and reception is good.
The infall that is positioned at two pairs of oscillators 1 at support bar 5 is provided with the protective cover of being made by insulating material 2; this protective cover 2 can be protected the internal structure of antenna; wherein; described insulating material is fiberglass or engineering plastics; engineering plastics can adopt multiple, for example are polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene copolymer (ABS), polystyrene (PS) or polytetrafluoroethylene (PTFE) etc.Certainly, other insulating material also can adopt.
Be provided with firm banking 6 in support bar 5 bottoms, firm banking 6 is provided with most fixing holes that place for retaining element, can entire antenna be fixed on predetermined location by retaining element, the entire antenna simple installation, below support bar 5, be provided with reflecting plate 7, this reflecting plate 7 is latticed, and described reflecting plate 7 is fixed on the bottom of firm banking 6, can make the location more firm.
Be provided with short-circuit piece 3 on support bar 5, described circuit board 3 is electrically connected with reflecting plate 7.Therefore, can constitute earth connection by reflecting plate 7, the energy DC earthing, anti-lightning strike effective.
The technical parameter of the FM circular polarization bipolar plate antenna that the utility model provides is:
Frequency range (Frequency Range): 87～108MHz
Polarization mode (Polarization): circular polarization (Circular)
Gain (Gain): 3.5dB centre frequency (at mid-band)
Standing-wave ratio (VSWR):＜1.15
Input impedance (Impedance): 50
Input (Input): 2 * 7/16F head
Input power (Max.power): every road 2kW (Each input)
Weight (weight): 38kg
Maximum design wind speed (Max.design Wind speed): 220km/h
The insulator material (Material, insulators): PTFE/ABS
Vibrator material (Material, Radiators): aluminium alloy (Aluminum alloy)
Reflector net material (Material, Reflecting Screen): hot-galvanized steel (Hot-dipgalvanized steel)
Learn that through experiment the electric property of FM circular polarization bipolar plate antenna of the present utility model is as follows: the voltage standing wave ratio of antenna (VSWR) smaller or equal to 1.15, satisfies the requirement of concerned countries industry standard at frequency modulation Duan Jun.
Claims (10)
1. a FM circular polarization bipolar plate antenna comprises two pairs of symmetrical dipoles that are located on the support bar, and it is characterized in that: described every pair of oscillator is the both sides that conllinear is distributed in support bar, and two pairs of oscillators intersect mutually, and it is poor to have current feed phase between each oscillator.
2. FM circular polarization bipolar plate antenna according to claim 1 is characterized in that: the crossing angle between described two pairs of oscillators is 80～100 degree.
3. FM circular polarization bipolar plate antenna according to claim 2 is characterized in that: described crossing angle is 90 degree.
4. FM circular polarization bipolar plate antenna according to claim 1 is characterized in that: the current feed phase difference between described each oscillator is 80～100 degree.
5. FM circular polarization bipolar plate antenna according to claim 4 is characterized in that: the current feed phase difference between described each oscillator is 90 degree.
6. according to any described FM circular polarization bipolar plate antenna in the claim 1～5, it is characterized in that: the infall that is positioned at two pairs of oscillators at support bar is provided with the protective cover of being made by insulating material.
7. FM circular polarization bipolar plate antenna according to claim 6, it is characterized in that: described insulating material is fiberglass or engineering plastics.
8. FM circular polarization bipolar plate antenna according to claim 1 is characterized in that: be provided with firm banking in the support bar bottom, firm banking is provided with several fixing holes that place for retaining element.
9. FM circular polarization bipolar plate antenna according to claim 8, it is characterized in that: be provided with reflecting plate below support bar, described reflecting plate is located at the bottom of firm banking.
10. FM circular polarization bipolar plate antenna according to claim 9, it is characterized in that: be provided with short-circuit piece on support bar, described circuit board is electrically connected with reflecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201699184U CN201051537Y (en) | 2007-07-27 | 2007-07-27 | FM round polarization dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201699184U CN201051537Y (en) | 2007-07-27 | 2007-07-27 | FM round polarization dipole antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201051537Y true CN201051537Y (en) | 2008-04-23 |
Family
ID=39338029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201699184U Expired - Lifetime CN201051537Y (en) | 2007-07-27 | 2007-07-27 | FM round polarization dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201051537Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101673874B (en) * | 2009-10-13 | 2012-09-05 | 厦门大学 | Unsymmetrical double dipole antenna used for vehicle-mounted digital television |
| CN103050787A (en) * | 2011-10-12 | 2013-04-17 | 卡西欧计算机株式会社 | Antenna |
| CN108918077A (en) * | 2018-05-22 | 2018-11-30 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of low-speed wind tunnel flutter test wing model support device |
| CN110620292A (en) * | 2019-09-17 | 2019-12-27 | 卞国荣 | VHF circular polarization transmitting antenna |
-
2007
- 2007-07-27 CN CNU2007201699184U patent/CN201051537Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101673874B (en) * | 2009-10-13 | 2012-09-05 | 厦门大学 | Unsymmetrical double dipole antenna used for vehicle-mounted digital television |
| CN103050787A (en) * | 2011-10-12 | 2013-04-17 | 卡西欧计算机株式会社 | Antenna |
| CN103050787B (en) * | 2011-10-12 | 2014-11-26 | 卡西欧计算机株式会社 | Antenna |
| CN108918077A (en) * | 2018-05-22 | 2018-11-30 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of low-speed wind tunnel flutter test wing model support device |
| CN110620292A (en) * | 2019-09-17 | 2019-12-27 | 卞国荣 | VHF circular polarization transmitting antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080423 |