CN1007481B - Super wide-band truck-mounted aerial - Google Patents
Super wide-band truck-mounted aerialInfo
- Publication number
- CN1007481B CN1007481B CN 87108212 CN87108212A CN1007481B CN 1007481 B CN1007481 B CN 1007481B CN 87108212 CN87108212 CN 87108212 CN 87108212 A CN87108212 A CN 87108212A CN 1007481 B CN1007481 B CN 1007481B
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- CN
- China
- Prior art keywords
- antenna
- main body
- band
- vehicle
- adopts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
The present invention relates to an ultra-wideband vehicle-mounted antenna. A radiating and receiving body of the antenna adopts a top-shaped rotary symmetrical monopole to realize the wideband property and adopts a method that covered metal belt is connected with a matching reactor at the terminal to further expand the operating frequency of the low-frequency end according to the pattern matching mechanism of the body to enable the whole operating frequency range to be from 20MHZ to 1500MHZ. all parts of the antenna is sheathed in an antenna cover to become a whole body, and the length, the width and the height are 100*22*35cm<3>. The antenna is longitudinally absorbed on a vehicle top. The antenna has the advantages of low contour, wide frequency band, convenient carrying and high safety and reliability; moreover, the antenna is suitable for multiple purposes of modern vehicle mounting.
Description
The present invention relates to a kind of ultrabroad band car antenna.
The broadband car antenna of the broadband mobile communication in present city, limited occupation (as scouting) usefulness, most wire monopole antennas that adopt.As the shortening shape center-fed antenna of being mentioned in the U.S. AD-82476 report.This antenna is high 3.05 meters, though added 10 segmented tuning circuit, working frequency range still has only 30MHZ～80MHZ.This antenna is except that structure complexity, frequency band are narrow, and topmost shortcoming is that length is too high, easily fracture and with phenomenons such as high-voltage line or other barrier bump.Though 3.364,491 patents of the U.S. are a kind of broad-band antennas, be 1.5: 1 oval rotating main body owing to only adopted the ratio of width to height, thereby, still exist the lower frequency limit height, the deficiency that frequency band is narrow.
The purpose of this invention is to provide a kind of low profile, ultrabroad band, conveniently moving, the higher novel on-vehicle antenna of ratio of gains prior art.
The present invention is that to adopt the top in shape rotationally symmetric body with broadband character be antenna body, and the top of main body has added a metal tape, another termination match reactance of metal tape.One end of main body and the other end of match reactance link to each other with ground plate respectively.Entire antenna partly is encapsulated in the radome, is adsorbed on the roof with magnet.
The appearance profile of antenna body of the present invention is to have adopted the broadband principle design of endless biconical antenna and discone antenna to become the top in shape rotary body.This rotary body is to be formed by the curve rotation that circular cone-ellipse-three kinds of curves of circular cone constitute.This curve is to utilize the moment method in the electromagnetic theory to calculate.This top in shape surfaces of revolution make by coaxial line excited ripple along its outside when the external radiation, reflection is minimum, promptly can reach pattern matching preferably between the interface, space.Actual measurement shows that height is the top in shape antenna of 280mm, and its CURRENT DISTRIBUTION mainly is capable wavelength-division cloth more than 150MHZ, thereby antenna has broadband character.Be that the best applications frequency range is 150MHZ～1500MHZ, standing-wave ratio is less than 3.0.
In order to increase effective depth and the horizontal polarization component of antenna in low-frequency range, the present invention has added a strip metal band at the top of antenna body, make the working frequency range of antenna move down into 20MHZ from 150MHZ.The other end of metal tape joins with the matching element of perception, changes the numerical value of inductance, can reach to change antenna low-frequency voltage standing-wave ratio characteristic.This inductance can once mix up.The ground plate of turning for fear of the ground plate and the teetotum of match reactance one end connects together and constitutes a return rings and influence the performance of antenna, thereby the fixture that connects two ground plates adopts insulating material.
The present invention compared with prior art has following advantage:
1. adopt the top in shape antenna body, make the working band of antenna wide, omnidirectional's directional characteristic is good, be applicable to various vehicle-mounted all channel antennas, can make the shared one pair of antenna of several channels;
2. adopt the pattern Broadband Matching, need not to add tuning match circuit, not only simple in structure, and efficient is higher;
3. adopt the top in shape antenna body, promptly with the method that increases antenna volume, not only broadening the working band of antenna, and reduced the height of antenna, be convenient to mobile communication, safe and reliable;
In whole frequency average gain than 47 centimeters high 8dB of vehicle-mounted sucker antenna;
5. the other end that adds at top in shape main body top is connected to the metal tape of reactance, has improved the low frequency characteristic of antenna, and has made antenna have the horizontal polarization component.
Followingly structural principle of the present invention is further described with reference to accompanying drawing:
Fig. 1 is top in shape antenna body figure of the present invention.
Fig. 2 is overall structure figure of the present invention.
The bottom of the rotation symmetry metal shell (1) of primary radiation among Fig. 1 (reception) body is welded with an insulation and supports annulus (2).Annulus (2) thoroughly does away with edge screw rod (3) (only having drawn two among the figure) with four and is fixed on the aluminium chassis (5).The root of main body (1) is inboard to be welded with pair of lamina platform awl (6).(6) center is installed with aperture, so that be L
16The inner wire of 50KK coaxial line socket (7) inserts and connects.The welding of the top inner wall of metal shell (1) and copper frustum (8), the frustum (9) of band screw rod and frustum (8) are with being threaded.Among Fig. 2, an end of aluminum metal-loaded bar (10) is fixed on the top of metal shell (1) by frustum screw rod (9).The other end of metal-loaded bar (10) is connected with ground connection aluminium sheet (5) by inductance (11).Be fixed as one with dielectric panel (12) between the ground plate (5) of this ground plate (5) and metal shell bottom, and isolate mutually.Ground plate (5) two ends are fixed on the circular magnet (13) with screw respectively.Radome (14) profile is streamlined, makes with fiberglass, be fixed on ground plate (5) around, its entire antenna is become one.Vertically place and be adsorbed on the roof (15).
Most preferred embodiment of the present invention is that to select the depth-width ratio of top in shape surfaces of revolution main body be 1.5: 1.The length of integrated antenna is of a size of 100 * 22 * 35cm
3The working band scope is 20MHZ-1500MHZ.
Another embodiment of the present invention is to elect the height of top in shape surfaces of revolution main body, wide ratio as 3: 2, and height can be used as the all-channel Indoor TV antenna for 280mm.
The 3rd embodiment of the present invention replaces top in shape rotating main body metal covering with 16 leads, and its physical dimension increases 5 times than car antenna main body and just can be used as omnidirectional's ultrabroad band fixed station antenna.
Claims (2)
1, a kind of broad-band antenna, main body employing depth-width ratio is 1.5: 1 a rotary body, the lower end of main body is fixed on the ground connection aluminium sheet, the additional metal tape in top that it is characterized in that main body, metal tape one termination has match reactance, the other end of match reactance is connected on the ground connection aluminium sheet, separates with insulating material between main body and the match reactance two ground connection aluminium sheets, and entire antenna is encapsulated in the radome.
2, antenna according to claim 1 is characterized in that rotating main body is to be made of circular cone-ellipse-three kinds of curves of circular cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87108212 CN1007481B (en) | 1987-12-24 | 1987-12-24 | Super wide-band truck-mounted aerial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87108212 CN1007481B (en) | 1987-12-24 | 1987-12-24 | Super wide-band truck-mounted aerial |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1037619A CN1037619A (en) | 1989-11-29 |
| CN1007481B true CN1007481B (en) | 1990-04-04 |
Family
ID=4816414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87108212 Expired CN1007481B (en) | 1987-12-24 | 1987-12-24 | Super wide-band truck-mounted aerial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1007481B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4189350B2 (en) * | 2003-06-27 | 2008-12-03 | 株式会社神戸製鋼所 | Titanium material, manufacturing method thereof and exhaust pipe |
| CN1862880B (en) * | 2006-03-24 | 2010-05-12 | 中国电子科技集团公司第三十八研究所 | Superwide band single polar antenna |
| EP3285332B1 (en) * | 2016-08-19 | 2019-04-03 | Swisscom AG | Antenna system |
| CN109193130B (en) * | 2018-09-07 | 2020-12-18 | 上海匀羿电磁科技有限公司 | Small ultra-wideband dual-beam antenna |
-
1987
- 1987-12-24 CN CN 87108212 patent/CN1007481B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1037619A (en) | 1989-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| 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 |