CN104466365A - Short wave communication-in-moving resonant ring antenna - Google Patents
Short wave communication-in-moving resonant ring antenna Download PDFInfo
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- CN104466365A CN104466365A CN201410813162.7A CN201410813162A CN104466365A CN 104466365 A CN104466365 A CN 104466365A CN 201410813162 A CN201410813162 A CN 201410813162A CN 104466365 A CN104466365 A CN 104466365A
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Abstract
The invention belongs to the field of the antenna technology and relates to a vehicle-mounted short wave communication antenna. A short wave communication-in-moving resonant ring antenna comprises a basic antenna frame, a rectangular metal ring, a vacuum variable ceramic capacitor, a gamma coupled feeding structure, a stepping motor, an absolute value encoder and a control circuit. The short wave communication-in-moving resonant ring antenna mainly has the advantages that impedance matching and the antenna are integrally designed, antenna feeding efficiency is high, the work frequency range is wide, and an outer contour is low; under the same dimensional condition, the resonant ring antenna has radiant efficiency far higher than radiant efficiency of a matching antenna. The antenna has the nearly-vertical incidence capacity and the problem of a short wave communication dead zone can be effectively solved.
Description
Technical field
The invention belongs to " antenna technology " field, relate to a kind of vehicle shortwave communication antenna.
Background technology
Tradition short wave vehicle-mounted antenna mostly is whip antenna, and whip antenna, due to the restriction of its directional diagram, inevitably occurs communication blind district in actual use.It is strengthen radio station transmitting power that current solution to this problem mainly contains three kinds: one, increases ground wave transmission distance, thus reduces the scope of short wave communication blind area; Two is increase leaning device to whip antenna, and improve the aerial radiation elevation angle, the sky wave first that furthers jumps the distance of pick-up point, also can reduce short wave communication blind area; Three is utilize nearly vertical incidence principle, makes end ground connection by originally whip antenna that is vertical or that tilt is bending, forms an annular loop, thus makes antenna possess high elevation radiation ability, eliminate theoretic communication blind district.
Above-mentioned three kinds of methods can improve blind area communication efficiency to a certain extent, but all there are some obvious shortcomings.First method strengthens radio station transmitting power, to the lifting limited efficiency of earthwave transmission range, and communication efficiency difference can be caused larger because of the difference of geological conditions; During second method communication, antenna is in lodging state, can cause acutely rocking of antenna during vehicle Fast marching, causes communication quality unstable, is difficult to the effect realizing shortwave " communication in moving "; The third method is by whip antenna bent back ends ground connection, make antenna have the ability of nearly vertical incidence, but it still belong to coupling class antenna in essence, under comparable size condition, due to the power consumption of matching network and radiant body CURRENT DISTRIBUTION uneven, the radiation efficiency of mating class antenna can be caused lower.
Summary of the invention
According to the technical problem that background technology relates to, the present invention proposes a kind of shortwave " communication in moving " resonant ring antenna, this antenna designs according to " LC series resonance principal ", have the advantages that profile is low, structure is simple, reliable and stable, this antenna not only has nearly vertical incidence ability, also there is higher radiation efficiency, effectively can solve the problem of vehicle shortwave antenna communication blind area, and significantly promote running short wave communication quality in 0 ~ 500 kilometer range.
A kind of shortwave " communication in moving " the resonant ring antenna that the present invention proposes, comprises antenna pedestal, rectangular metal ring, ceramic vacuum variable capacitance, gamma coupling feed structure, and stepping motor, absolute value encoder, control circuit.
Antenna pedestal adopts metal material to make, and by the orthogonal frame of Al pipe butt welding, outward appearance is like luggage carrier, and the other parts for antenna provide fixing and supporting role.Rectangular metal ring is that the side of antenna pedestal is fixed in one end of rectangular metal ring by bearing, the other end of rectangular metal ring is fixed on the opposite side of antenna pedestal through insulating rod and bearing while the semicircular configuration of opening.Rectangular metal ring connects one end of insulating rod again through one end of soft copper band connection vacuum variable capacitor, another termination antenna pedestal of vacuum variable capacitor.Such entire physical just defines LC series resonant tank, and rectangular metal ring is the inductive part of resonant tank, is also the radiant section of whole antenna.Gamma coupling feed structure is " Г " shape aluminium strip, and the part of rectangular metal articulating antenna pedestal is fixed in one end of aluminium strip, and the other end of aluminium strip is through soft copper band connection control circuit box radio-frequency (RF) output end.The output of the input termination radio station radio frequency cable of control circuit box.Stepping motor and absolute value encoder and vacuum variable capacitor are fixed in same can, and stepping motor changes the capacitance size of vacuum variable capacitor under the driving of control circuit, and absolute value encoder is for recording the position of vacuum variable capacitor.
Control circuit is primarily of frequency detection module, voltage standing wave ratio detection module, motor drive module, power transfer module, and microprocessor module composition.The radiofrequency signal that radio station sends enters control circuit, circuit detects frequency and the standing wave ratio of input voltage of input signal in real time, the numerical value that microprocessor feeds back according to frequency and voltage standing-wave ratio and absolute value encoder, the direction of control step motor follow procedure setting rotates, change the capacitance of vacuum variable capacitor, make antenna resonance in radio station operating frequency.Under the effect of control circuit, stepping motor drive vacuum variable capacitor from turn to and stop operating, be considered as once tuning, tuning aft antenna is in resonance condition and is namely considered as tuning success.After tuning success, antenna enters normal operating conditions.
The technical scheme that the present invention limits further is:
Aforesaid shortwave " communication in moving " resonant ring antenna, wherein said gamma coupling feed structure and vacuum variable capacitor are placed in the two ends of rectangular aperture becket respectively, require that radio station feed end is away from capacitance terminal, make the CURRENT DISTRIBUTION on rectangular metal ring more even, and then improve the radiation efficiency of antenna.
Aforesaid shortwave " communication in moving " resonant ring antenna, wherein said gamma coupling feed structure is " Г " type aluminium flake, plays the effect of couple feed and impedance matching, has very high feed efficiency, can realize impedance matching in wider frequency range.
Aforesaid shortwave " communication in moving " resonant ring antenna, wherein said control circuit box, its inside is without any loading capacitance for impedance matching or loaded cable, on control circuit box, the inner wire of coaxial line interface directly connects gamma coupling feed structure by a section lead, does not have any inductance of serial or parallel connection or electric capacity.
Aforesaid shortwave " communication in moving " resonant ring antenna, wherein said variable capacitance is ceramic vacuum variable capacitance, and have higher withstand voltage, operating voltage is not less than 7.5KV.
Aforesaid shortwave " communication in moving " resonant ring antenna, wherein said antenna resonant frequency is determined by rectangular metal ring size and vacuum variable capacitor capacitance scope.After rectangular metal ring size is determined, antenna resonant frequency scope is determined by selected vacuum variable capacitor capacitance scope.Preferably, rectangular metal ring length is defined as 2 meters, selects vacuum variable capacitor capacitance scope to be 10 ~ 1500pF, and antenna resonant frequency scope (i.e. operating frequency of antenna scope) comprises 3 ~ 15MHz.
In a word, the major advantage of shortwave of the present invention " communication in moving " resonant ring antenna is impedance matching and antenna integrated design, and outline is low, and antenna feed efficiency is high, and operating frequency range is wide; Under comparable size condition, this resonant ring antenna has the radiation efficiency more much higher than coupling class antenna.Antenna provided by the invention has the ability of nearly vertical incidence, effectively can solve the problem of short wave communication blind area.
Accompanying drawing explanation
Figure is the structure chart of a kind of shortwave " communication in moving " the resonant ring antenna that the present invention proposes.
Embodiment
The present embodiment is a kind of shortwave " communication in moving " resonant ring antenna, as accompanying drawing shows, the antenna in the present embodiment comprises antenna pedestal 1, rectangular metal ring 2, glass fibre reinforced plastic insulating rod 3, electric capacity fixing metal box 4, gamma coupling feed structure 5, control circuit can 6, ceramic vacuum variable capacitance 7, stepping motor 8, absolute value encoder 9, control signal cable 10, coaxial line interface 11 form.
Antenna pedestal 1 is metal structure, plays and fixes and the effect being connected other structure of antenna.Rectangular metal ring 2 is by vertical rod 2A, horizon bar 2B, vertical rod 2C, and inverted L-shaped aluminium strip 2D forms, and one end of vertical rod 2A is connected with one end of antenna pedestal 1, and vertical rod 2C is connected with glass fibre reinforced plastic insulating rod 3 with the other end of antenna pedestal 1.Inverted L-shaped aluminium strip 2D is connected with soft copper band with one end of ceramic vacuum variable capacitance 7, and the other end of vacuum capacitance 7 is connected with electric capacity fixing metal box 4, and electric capacity fixing metal box 4 is connected with antenna pedestal 1.Antenna pedestal 1, rectangular metal ring 2, vacuum variable capacitor 7 form LC series resonant tank, and wherein inductance is the loop checking installation that rectangular metal ring 2 and antenna pedestal 1 form.
Ceramic vacuum electric capacity 7 is connected with driving belt with between stepping motor 8 and absolute value encoder 9.It is inner that stepping motor 8, absolute value encoder 9, ceramic vacuum electric capacity 7 are installed in electric capacity fixing metal box 4.Stepping motor 8 and absolute value encoder 9 are connected to the control circuit of control circuit can 6 inside through control signal cable 10.Control circuit comprises microprocessor and interlock circuit module and program, the standing wave ratio of input voltage that microprocessor is fed back by standing-wave ratio testing circuit and the capacitance positions data that absolute value encoder 9 feeds back carry out the running of control step motor 8, and then change capacitor's capacity, make antenna resonance on a different frequency.
Coaxial line interface 11 connects radio station radiofrequency signal output cable, and the outer conductor of coaxial line interface 11 is connected conducting with control circuit can.In the inside of control circuit can 6, the inner wire of coaxial line interface 11 passes the magnet ring of standing-wave ratio testing circuit, and is connected with gamma coupling feed structure 5 with soft copper band through copper post at the middle part of control circuit can 6.
The radiofrequency signal sent when radio station is through coaxial line interface 11, control circuit can 6 and gamma coupling feed structure 5, enter the LC resonant tank be made up of antenna pedestal 1, rectangular metal ring 2, vacuum variable capacitor 7, the standing-wave ratio testing circuit of control circuit can 6 inside detects standing wave ratio of input voltage.The data that micro-processor interface circuit feeds back according to the program preset and voltage standing wave ratio, absolute value encoder 9, through the running of motor-drive circuit control step motor 8, stepping motor 8 drives vacuum variable capacitor 7 to rotate, thus change the capacitor's capacity size of LC series resonant tank, and then change the resonance frequency of resonant tank (antenna), make antenna resonant frequency and radio station send the frequency of signal consistent.Usually, during this antenna resonance, usual standing wave is smaller, therefore weighs antenna resonance situation by detecting standing wave ratio of input voltage.Because this antenna size (length is no more than 3 meters, is highly no more than 0.7 meter) is much smaller than the wavelength of operating frequency, belong to electronically small antenna, therefore this antenna has very high quality factor (Q value).
According to the feature of LC series resonant circuit, during resonance, in circuit, the terminal voltage of electric capacity is Q times (Q is the quality factor of resonant circuit) of loop input voltage.Therefore, under antenna transmission state, the magnitude of voltage at ceramic vacuum variable capacitance 7 two ends is that gamma coupling feed structure 5 is with the Q of coupled modes feed-in tank voltage times.Ceramic vacuum variable capacitance 7 and gamma coupling feed structure 5 are placed in the two ends of rectangular metal ring 2, contribute to improving as the CURRENT DISTRIBUTION on the rectangular metal ring 2 of radiant body, obtain good antenna pattern and communication efficiency.
The above, be only a comparatively outstanding embodiment of the present invention, but protection scope of the present invention is not limited thereto, the technical scheme that every equivalent transformation carried out according to principle of the present invention is formed, all within protection scope of the present invention.
Claims (6)
1. shortwave " communication in moving " resonant ring antenna, is characterized in that: comprise antenna pedestal (1), rectangular metal ring (2), glass fibre reinforced plastic insulating rod (3), electric capacity fixing metal box (4), gamma coupling feed structure (5), control circuit can (6), ceramic vacuum variable capacitance (7), stepping motor (8), absolute value encoder (9), control signal cable (10), coaxial line interface (11);
Antenna pedestal (1) is metal structure, plays and fixes and the effect being connected other structure of antenna; Rectangular metal ring (2) is by vertical rod (2A), horizon bar (2B), vertical rod (2C), and inverted L-shaped aluminium strip (2D) composition, one end of vertical rod (2A) is connected with one end of antenna pedestal (1), and vertical rod (2C) is connected with glass fibre reinforced plastic insulating rod (3) with the other end of antenna pedestal (1); Inverted L-shaped aluminium strip (2D) is connected with soft copper band with one end of ceramic vacuum variable capacitance (7), and the other end of vacuum capacitance (7) is connected with electric capacity fixing metal box (4), and electric capacity fixing metal box (4) is connected with antenna pedestal (1); Antenna pedestal (1), rectangular metal ring (2), vacuum variable capacitor (7) just form LC series resonant tank, and wherein inductance is the loop checking installation that rectangular metal ring (2) and antenna pedestal (1) form;
Vacuum variable capacitor (7) is connected with driving belt with between stepping motor (8) and absolute value encoder (9); It is inner that stepping motor (8), absolute value encoder (9), ceramic vacuum electric capacity (7) are installed in electric capacity fixing metal box (4); Stepping motor (8) and absolute value encoder (9) are connected to the inner control circuit of control circuit can (6) through control signal cable (10); Containing microprocessor and interlock circuit module and program in control circuit, the standing wave ratio of input voltage that microprocessor is fed back by standing-wave ratio testing circuit and the capacitance positions data that absolute value encoder (9) feeds back carry out the running of control step motor (8), and then change capacitor's capacity, make antenna resonance on a different frequency.
2. shortwave according to claim 1 " communication in moving " resonant ring antenna, it is characterized in that: gamma coupling feed structure (5) and the two ends being placed in rectangular aperture becket both ceramic vacuum variable capacitance (7) respectively, radio station feed end is away from capacitance terminal, make the CURRENT DISTRIBUTION on rectangular metal ring more even, and then improve the radiation efficiency of antenna.
3. shortwave according to claim 1 " communication in moving " resonant ring antenna, it is characterized in that: gamma coupling feed structure (5) is " Г " type aluminium flake, play the effect of couple feed and impedance matching, there is very high feed efficiency, impedance matching can be realized in wider frequency range.
4. shortwave according to claim 1 " communication in moving " resonant ring antenna, it is characterized in that: control circuit can (6) is inner without any loading capacitance for impedance matching or loaded cable, namely on control circuit box, the inner wire of coaxial line interface directly connects gamma coupling feed structure by a section lead, and does not have any inductance of serial or parallel connection or electric capacity.
5. shortwave according to claim 1 " communication in moving " resonant ring antenna, is characterized in that: ceramic vacuum variable capacitance (7) has higher withstand voltage, and operating voltage is not less than 7.5KV.
6. shortwave according to claim 1 " communication in moving " resonant ring antenna, is characterized in that: antenna resonant frequency is determined jointly by the size of rectangular metal ring (2) and the capacitance scope of ceramic vacuum variable capacitance (7); After rectangular metal ring (2) size is determined according to antenna carrier size, antenna resonant frequency scope is determined by the capacitance scope of selected ceramic vacuum variable capacitance (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813162.7A CN104466365B (en) | 2014-12-24 | 2014-12-24 | Shortwave " communication in moving " resonance loop antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410813162.7A CN104466365B (en) | 2014-12-24 | 2014-12-24 | Shortwave " communication in moving " resonance loop antenna |
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| CN104466365A true CN104466365A (en) | 2015-03-25 |
| CN104466365B CN104466365B (en) | 2017-09-22 |
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| CN201410813162.7A Active CN104466365B (en) | 2014-12-24 | 2014-12-24 | Shortwave " communication in moving " resonance loop antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098331A (en) * | 2015-08-05 | 2015-11-25 | 北京米波通信技术有限公司 | Short wave fast tuning resonance loop antenna |
| CN108695587A (en) * | 2017-03-30 | 2018-10-23 | 福霸汽车电子有限公司 | Antenna for the circular polarisation satellite radio signal for receiving Vehicular satellite navigation |
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| CN2058276U (en) * | 1989-02-01 | 1990-06-13 | 中国人民解放军总参谋部第六十一研究所 | Vehicle-borne short-wave double ring transmitting antenna |
| AU2001100423A4 (en) * | 2001-09-28 | 2001-10-25 | Q-Mac Electronics Pty Ltd | Vehicle roofrack high frequency half-loop antenna system |
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2014
- 2014-12-24 CN CN201410813162.7A patent/CN104466365B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2058276U (en) * | 1989-02-01 | 1990-06-13 | 中国人民解放军总参谋部第六十一研究所 | Vehicle-borne short-wave double ring transmitting antenna |
| AU2001100423A4 (en) * | 2001-09-28 | 2001-10-25 | Q-Mac Electronics Pty Ltd | Vehicle roofrack high frequency half-loop antenna system |
Non-Patent Citations (3)
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| 李引凡: "天线调谐器阻抗匹配网络与调谐算法研究", 《中国优秀硕士学位论文全文数据库-信息科技辑》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098331A (en) * | 2015-08-05 | 2015-11-25 | 北京米波通信技术有限公司 | Short wave fast tuning resonance loop antenna |
| CN108695587A (en) * | 2017-03-30 | 2018-10-23 | 福霸汽车电子有限公司 | Antenna for the circular polarisation satellite radio signal for receiving Vehicular satellite navigation |
| CN108695587B (en) * | 2017-03-30 | 2021-04-23 | 福霸汽车电子有限公司 | Antenna for receiving circularly polarized satellite wireless signals of vehicle-mounted satellite navigation |
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| CN104466365B (en) | 2017-09-22 |
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