CN103515707A - Rotating system of H-face array short wave logarithm three-dimensional array antenna - Google Patents
Rotating system of H-face array short wave logarithm three-dimensional array antenna Download PDFInfo
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- CN103515707A CN103515707A CN201310453698.8A CN201310453698A CN103515707A CN 103515707 A CN103515707 A CN 103515707A CN 201310453698 A CN201310453698 A CN 201310453698A CN 103515707 A CN103515707 A CN 103515707A
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Abstract
The invention discloses a rotating system of an H-face array short wave logarithm three-dimensional array antenna. The antenna comprises a support and a plurality of log periodic antenna units which are erected on the support, are arrayed according to preset included angle degree and are distributed in a sector shape. The support is erected on a vertical tower mast. The rotating system comprises a turning mechanism and a rotating mechanism. The turning mechanism is arranged at the top end of the tower mast, is movably connected with the support and is used for adjusting the elevation angle of the antenna. The rotating mechanism is arranged at the bottom end of the tower mast. Horizontal rotating of the antenna is achieved by the fact that the rotating mechanism drives the tower mast to rotate. According to the rotating system, the matched rotating system is arranged for a novel antenna system, the antenna of the rotating system can be horizontally adjusted by 360 degrees in a full-angle-elevation-angle through the arranged turning mechanism and the arranged rotating mechanism, and accordingly the antenna has great signal transmitting and receiving performance after angle adjusting, and the performance of the H-face array short wave logarithm three-dimensional array antenna is achieved to the maximum degree.
Description
Technical field
The present invention relates to communication antenna technical field, relate in particular to a kind of rotation system of H face group battle array shortwave logarithm solid array antenna.
Background technology
The domestic shortwave large-scale antenna system of tradition be take broadband curtain antenna as main, as illustrated in fig. 1 and 2.Broadband curtain antenna is that horizontal directivity pattern is controlled by the number of every layer of array-element antenna by multilayer all-wave or the molecular antenna array of half-wave dipole, and height pattern is controlled by the number of plies of array-element antenna and the terrain clearance of lowermost layer antenna.Its advantage is that frequency band range is wider, power is large, propagation distance is far away.But the shortcoming of broadband curtain antenna also clearly, mainly comprises: 1 floor space is large, and landform requires harsh; 2 antenna bodies are high, and structural volume is large; 3 engineering constructions are difficult, and the construction period is long; 4 use complicated operation, maintenance difficulty.
And broadband curtain antenna is generally external import, Some Domestic producer also has research and development to produce in this system, but core technology does not break through, the product power of producing is less, and coverage is narrow, and such product design is complicated, structure is loaded down with trivial details, parts are many, bulky, installation difficulty, and expensive, inconvenient maintenance, the more important thing is that core technology is under one's control, a lot of products can not be repaired in time because of fault after introducing, and cannot use.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of rotation system of H face group battle array shortwave logarithm solid array antenna, be intended to solve current broadband curtain antenna landform and require the problems such as harsh, construction difficulty, complicated operation.
Technical scheme of the present invention is as follows:
A kind of rotation system of H face group battle array shortwave logarithm solid array antenna, described antenna comprises bracing frame, being erected at several on support frame as described above arranges by predetermined angle angle, the logarithm periodic antenna unit that is fan-shaped distribution, wherein, support frame as described above is erected on the tower mast of a setting, described rotation system comprises switching mechanism and slew gear, described switching mechanism is arranged on described tower mast top and is flexibly connected with support frame as described above, for adjusting the elevation angle of described antenna, described slew gear is arranged on described tower mast bottom, by driving described tower mast rotation to realize horizontally rotating of described antenna.
The rotation system of described H face group battle array shortwave logarithm solid array antenna, wherein, described switching mechanism comprises the latch that is vertically arranged on U-shaped of described tower mast top, is arranged on described U-shaped centre, is set in the link being fixedly connected with support frame as described above on described latch, realizes the adjustment at the support frame as described above elevation angle by described link around the rotation of described latch.
The rotation system of described H face group battle array shortwave logarithm solid array antenna, wherein, described link is fixedly installed on the position of centre of gravity of support frame as described above.
The rotation system of described H face group battle array shortwave logarithm solid array antenna, wherein, described link comprises two stocks that be arranged in parallel and is positioned at described stock two ends, is horizontally set with two quarter butts in the middle of two stocks, and described stock middle part is provided with for being set in the through hole on described latch.
The rotation system of described H face group battle array shortwave logarithm solid array antenna, wherein, described slew gear comprises the vertical columns that is set in described tower mast bottom, described vertical columns is flexibly connected with described tower mast.
The rotation system of described H face group battle array shortwave logarithm solid array antenna, wherein, described vertical columns bottom is arranged on the concrete basis that is used to described antenna that constant intensity is provided.
The rotation system of described H face group battle array shortwave logarithm solid array antenna; wherein; described switching mechanism and slew gear are controlled by control device for pivoting; described control device for pivoting comprises the processor, motor of data processing and control signal output, for carrying out the slip-clutch of overload protection, for realizing the brake of the static location of described antenna, for sending the angular encoder of rotational angle instruction, described motor, slip-clutch, brake, angular encoder are electrically connected with described processor respectively
Beneficial effect: the rotation system that the invention provides a kind of H face group battle array shortwave logarithm solid array antenna, for the set supporting rotation system of H face group battle array shortwave logarithm solid array this new antenna system of antenna, by set switching mechanism and slew gear, having realized antenna of the present invention can level 360 °, the adjustment at the full angle elevation angle, thereby make described antenna can after adjusting angle, there is best signal biography and connect performance, the performance of bringing into play to greatest extent H face group battle array shortwave logarithm solid array antenna of the present invention, has splendid application prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional broadband curtain antenna.
Fig. 2 is the end view of traditional broadband curtain antenna.
Fig. 3 is the structural representation of the rotation system of H face group battle array shortwave logarithm solid array antenna of the present invention.
Fig. 4 is that the system of the rotation system of H face group battle array shortwave logarithm solid array antenna of the present invention forms schematic diagram.
Fig. 5 is the assembly line bilinear model schematic diagram of the rotation system of H face group battle array shortwave logarithm solid array antenna of the present invention.
Fig. 6 is the control system schematic diagram of the rotation system of H face group battle array shortwave logarithm solid array antenna of the present invention.
Embodiment
The invention provides a kind of rotation system of H face group battle array shortwave logarithm solid array antenna, for making object of the present invention, technical scheme and effect clearer, clear and definite, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Logarithm periodic antenna (LPDA) is a kind ofly to have the very broadband sky of advantageous electrical properties and connect, it is all being similar to and frequency-independent aspect the main electric parameters such as input impedance, directional diagram, gain coefficient, its electrical characteristics become logarithm period relation to change with operating frequency, in arbitrary frequency f
0the characteristic having is by the f all
n=τ f
0frequency on repeat, f herein
0->τ nf
0be called one-period (τ is cycle rate, n=± 1,2,3 ...).If can design in one-period internal antenna electrical characteristics is a constant,, when all frequency work, all can think that same frequency is irrelevant, just this structure is called logarithm periodic antenna.
The theory of the fan-shaped battle array of logarithm periodic antenna than the line array complexity forming in isotropism unit many, and can not application direction figure multiplication.The present invention's application moment method is analyzed the fan-shaped battle array of free space horizontal and vertical Log Periodic Dipole Antenna, thereby and pair array parameter the impact of antenna performance is carried out to the optimization that detailed analytical calculation realizes antenna performance.
A kind of H face group battle array shortwave logarithm solid array antenna as shown in Figure 3, wherein, comprise aerial array and for setting up the bracing frame of described aerial array, described aerial array comprises several logarithm periodic antennas unit, between described several logarithm periodic antennas unit, by predetermined angle angle, arrange, be fan-shaped distribution.The selection of predetermined angle angle is carried out according to antenna gain and antenna pattern, as select improper, can fall and cause antenna gain and different design, directional diagram distorts, thereby affect the overall performance of aerial array, in preferred embodiment, this predetermined angle angle is 15 degree, under this angle angle, antenna gain and directional diagram all meet designing requirement.
Support frame as described above comprise the arrangement of corresponding described logarithm periodic antenna unit be several horizontal truss 210 of fan-shaped distribution, for the vertical truss 220 of fixing described horizontal truss 210, preferably, at the tie point of horizontal truss and vertical truss, and in two tie points of diagonal relation, be provided for again improving the brace of bracing frame intensity.Described logarithm periodic antenna unit is separately positioned on corresponding horizontal truss 210.Described logarithm periodic antenna unit comprises assembly line 110 along horizontal truss setting, by order from short to long, is successively set on the antenna oscillator 120 on assembly line 110.Described assembly line is arranged on the centre position of horizontal truss and is fixed, and the size of described assembly line is to be calculated and obtained by assembly line theoretical model, and the theoretical model of assembly line is generally traditional bilinear model, as shown in Figure 5, wherein L is two-wire length, and S is two-wire spacing, D is two-wire diameter, ε
rfor medium relative dielectric constant, by the even odd mode theory in microwave technology, can obtain the assembly line size that meets index request.
Preferably, described aerial array comprises 4 logarithm periodic antenna unit, described horizontal truss relative set is 4, described logarithm periodic antenna unit is not limited to 4, can arrange as required, on each horizontal truss, be provided with a logarithm periodic antenna unit, initial near one end, fan-shaped summit from described assembly line, described antenna oscillator is successively set on described assembly line by order from short to long.Described antenna oscillator number is 32 pairs, and between adjacent antenna oscillator, arrange according to logarithm period rule at interval, and certainly, antenna oscillator quantity is not limited to 32 pairs, also can adjust as required the quantity of antenna oscillator.
Support frame as described above is erected on the tower mast 322 of a setting, described rotation system comprises switching mechanism 310 and slew gear 320, described switching mechanism 310 is arranged on described tower mast 322 tops and is flexibly connected with support frame as described above, for adjusting the elevation angle of described antenna, described slew gear 320 is arranged on described tower mast 322 bottoms, by driving described tower mast 322 rotations to realize horizontally rotating of described antenna.
Described switching mechanism 310 comprises and is vertically arranged on U-shaped 323 of described tower mast top, is arranged on latch 324 in the middle of described U-shaped 323, is set in the link 325 being fixedly connected with support frame as described above on described latch 324, by described link 325, realizes the adjustment at the support frame as described above elevation angle around the rotation of described latch.Described link 325 comprises two stocks that be arranged in parallel and is positioned at described stock two ends, is horizontally set with two quarter butts in the middle of two stocks, and described stock middle part is provided with for being set in the through hole on described latch.Wherein, firm for ease of antenna integral body, described link 325 is fixedly installed on the position of centre of gravity of support frame as described above.
Described slew gear comprises the vertical columns 321 that is set in described tower mast bottom, and described vertical columns 321 is flexibly connected with described tower mast 322.Described vertical columns 321 bottoms are arranged on the concrete basis 330 that is used to described antenna that constant intensity is provided, and in described slew gear, are provided with Universal rotary joint, and described Universal rotary joint is sent to antenna rotating part by radiofrequency signal by antenna standing part.
Described switching mechanism and slew gear are controlled by control device for pivoting; described control device for pivoting comprises the processor, motor of data processing and control signal output, for carrying out the slip-clutch of overload protection, for realizing the brake of the static location of described antenna, for sending the angular encoder of rotational angle instruction, described motor, slip-clutch, brake, angular encoder are electrically connected with described processor respectively.
In control device for pivoting, also include in addition transmission and deceleration device, final stage exposed gear, overload protection arrangement (bull gear is fixed) etc., can be arranged on tower mast and also can be located at vertical columns part.Described angular encoder is just arranged on motor, and after setting the azimuth needing, sending instruction can be 360
oin scope, by the requirement of setting, rotate in place.
Described slip-clutch is used for protecting variable-frequency motor and driving parts; the wind speed that ought blow over antenna surpasses in the situation of 120 kilometers/hour; no matter antenna was in rotation process or was still on a certain service position at that time; this slip-clutch all can discharge the brake system of antenna automatically; even if transmitter is worked; also can make antenna down the wind rotate to the position of resistance minimum, now transmitter also can fall high pressure from dynamic circuit breaker.This is the self-protection function (when wind speed being detected and be greater than limiting value, releasing of brake, makes antenna be automatically brought to frontal resistance minimum state automatically) of antenna.Non-slip during normal starting and braking.
Brake is realized rotary antenna to the static location after angle on target, can also bear the function that opposing strong wind causes antenna direction drift simultaneously, also has in addition an effect, when antenna is driven, when there is power failure suddenly during rotation is advanced, can prevent from owing to rocking the load causing, antenna structure being impacted.
as Fig. 4shown in be that the system of the rotation system of H face group battle array shortwave logarithm solid array antenna of the present invention forms schematic diagram, wherein, transmitter 600 is transmitted and is entered power splitter 640 by feeder line 620, by power splitter 640 output signals, through feeder line, by each balanced to unbalanced transformer 630 inputs, inputted, be transformed into balanced signal and be respectively each logarithm periodic antenna unit power supply.Preferably, the signal of transmitter 600 transmittings first passed through and is connected to the through type lightning arrester 610 on feeder line before entering power splitter, thereby guaranteed the safety of instrument and equipment.In addition, the crust of described feeder line also needs DC earthing.Described power splitter is power divider, by the energy distribution of coming in from input port to N output port, in the present invention program, power splitter is one minute four power splitter, by a power splitter input port input signal, is divided into four barss and by four output ports, is exported respectively.It is English " balanced-unbalanced transformer " abbreviation that described balanced to unbalanced transformer has another name called Ba Lun (Balun).Its effect is except balanced-unbalanced conversion, and form, the structure of also looking Ba Lun can be carried out the impedance transformation of the ratios such as 1:1,4:1,6:1,9:1,25:1 simultaneously.
Control system 500 is control device for pivoting, the control that both realize antenna slew gear and switching mechanism by control line 510, and control line needs DC earthing equally.Power supply 700 connects antenna for control system and transmitter etc. provides power by power line 720, also needs to connect surging prevention device 710 on power line, realizes the surge of the instantaneous overvoltage of indirect thunder and lightning and direct thunder and lightning generation is protected.
It is pair huge with antenna system harm that thunder and lightning has high voltage, large electric current and instantaneous feature, according to the requirement of engineering lightning protection, to the antenna part of antenna, is that arrester (lightning rod) 400, downlead and earth electrode (earth mat) are realized lightning protection function.
As shown in Figure 6, control system has been born the adjustment of antenna rotational angle, and clutch, brake speed are controlled, and antenna safety interlock is controlled, and manually, automatically adjusts handoff functionality, long-range, the local function of controlling.Signal transmission between between antenna control system CPU processor A 4 and input are that Long-distance Control I/O scan module intercoms mutually by a remote I/O modules A 8.The preset value in orientation and actual value all can be presented on the touch-screen A1 of operating terminal through interface convertor A3, coupler A2.User, pass through the angle of angle transcoder A7 input aerial, frequency, and further input after the fill orders such as emergency cutoff S1, braking control S2, clutch for clutch control S3, door node S4, the angle that control system starts relatively to preset and actual angle, then control system is calculated needs the angle of adjusting and sends necessary control command to frequency converter A 5 and then drive motors A6, and these orders can guarantee that antenna arrives default angle by shortest path.
The rotation system of H face group battle array shortwave logarithm solid array antenna provided by the invention, for the set supporting rotation system of H face group battle array shortwave logarithm solid array this new antenna system of antenna, by set switching mechanism and slew gear, having realized antenna of the present invention can level 360 °, the adjustment at the full angle elevation angle, thereby make described antenna can after adjusting angle, there is best signal biography and connect performance, the performance of bringing into play to greatest extent H face group battle array shortwave logarithm solid array antenna of the present invention, has splendid application prospect.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (7)
1. the rotation system of a H face group battle array shortwave logarithm solid array antenna, described antenna comprises bracing frame, being erected at several on support frame as described above arranges by predetermined angle angle, the logarithm periodic antenna unit that is fan-shaped distribution, it is characterized in that, support frame as described above is erected on the tower mast of a setting, described rotation system comprises switching mechanism and slew gear, described switching mechanism is arranged on described tower mast top and is flexibly connected with support frame as described above, for adjusting the elevation angle of described antenna, described slew gear is arranged on described tower mast bottom, by driving described tower mast rotation to realize horizontally rotating of described antenna.
2. the rotation system of H face group battle array shortwave logarithm solid array antenna according to claim 1, it is characterized in that, described switching mechanism comprises the latch that is vertically arranged on U-shaped of described tower mast top, is arranged on described U-shaped centre, is set in the link being fixedly connected with support frame as described above on described latch, realizes the adjustment at the support frame as described above elevation angle by described link around the rotation of described latch.
3. the rotation system of H face group battle array shortwave logarithm solid array antenna according to claim 1, is characterized in that, described link is fixedly installed on the position of centre of gravity of support frame as described above.
4. the rotation system of H face group battle array shortwave logarithm solid array antenna according to claim 1, it is characterized in that, described link comprises two stocks that be arranged in parallel and is positioned at described stock two ends, be horizontally set with two quarter butts in the middle of two stocks, described stock middle part is provided with for being set in the through hole on described latch.
5. the rotation system of H face group battle array shortwave logarithm solid array antenna according to claim 1, is characterized in that, described slew gear comprises the vertical columns that is set in described tower mast bottom, and described vertical columns is flexibly connected with described tower mast.
6. the rotation system of H face group battle array shortwave logarithm solid array antenna according to claim 5, is characterized in that, described vertical columns bottom is arranged on the concrete basis that is used to described antenna that constant intensity is provided.
7. the rotation system of H face group battle array shortwave logarithm solid array antenna according to claim 1; it is characterized in that; described switching mechanism and slew gear are controlled by control device for pivoting; described control device for pivoting comprises the processor, motor of data processing and control signal output, for carrying out the slip-clutch of overload protection, for realizing the brake of the static location of described antenna, for sending the angular encoder of rotational angle instruction, described motor, slip-clutch, brake, angular encoder are electrically connected with described processor respectively.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633578A (en) * | 2015-12-17 | 2016-06-01 | 贵州振华天通设备有限公司 | Soft-vibrator log-periodic short-wave antenna structure |
| CN110867639A (en) * | 2019-11-26 | 2020-03-06 | 深圳市威富通讯技术有限公司 | Automatic array-forming control device and method for log periodic antenna array |
| CN111342197A (en) * | 2020-03-16 | 2020-06-26 | 河南爱科瑞特电子科技有限公司 | Miniaturized log-periodic antenna |
| CN111430873A (en) * | 2020-03-26 | 2020-07-17 | 泰兴英武舟科技有限公司 | Rigid structure short wave double-layer log periodic antenna sector array |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1528125A (en) * | 1975-10-31 | 1978-10-11 | Marconi Co Ltd | Log periodic antennae |
| DE3328894A1 (en) * | 1983-08-10 | 1985-02-28 | Kathrein-Werke Kg, 8200 Rosenheim | AERIAL COMBINATION |
| CN2043009U (en) * | 1988-08-16 | 1989-08-16 | 航天工业部第一研究院第十四研究所 | Uhf/vhf all channel tv receiving antenna |
| CN2178389Y (en) * | 1993-11-11 | 1994-09-28 | 徐允昭 | Half ball paraboloid U.V compatible full frenquency channel steering antenna |
| CN2178390Y (en) * | 1993-12-02 | 1994-09-28 | 陶少贵 | Non-warpping full frequency channel steering TV receiving antenna |
| US6677913B2 (en) * | 2001-06-19 | 2004-01-13 | The Regents Of The University Of California | Log-periodic antenna |
| CN1725558A (en) * | 2005-06-08 | 2006-01-25 | 财团法人台湾电子检验中心 | Design method of logarithmically periodic dipole array antenna structure |
| CN201134506Y (en) * | 2007-12-29 | 2008-10-15 | 浙江通普特种车有限公司 | Improved transmission system of microwave antenna |
-
2013
- 2013-09-29 CN CN201310453698.8A patent/CN103515707B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633578A (en) * | 2015-12-17 | 2016-06-01 | 贵州振华天通设备有限公司 | Soft-vibrator log-periodic short-wave antenna structure |
| CN105633578B (en) * | 2015-12-17 | 2018-06-12 | 贵州振华天通设备有限公司 | A kind of soft oscillator logarithm period short-wave antenna structure |
| CN110867639A (en) * | 2019-11-26 | 2020-03-06 | 深圳市威富通讯技术有限公司 | Automatic array-forming control device and method for log periodic antenna array |
| CN111342197A (en) * | 2020-03-16 | 2020-06-26 | 河南爱科瑞特电子科技有限公司 | Miniaturized log-periodic antenna |
| CN111342197B (en) * | 2020-03-16 | 2024-03-22 | 河南爱科瑞特电子科技有限公司 | Miniaturized log periodic antenna |
| CN111430873A (en) * | 2020-03-26 | 2020-07-17 | 泰兴英武舟科技有限公司 | Rigid structure short wave double-layer log periodic antenna sector array |
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Effective date of registration: 20161229 Address after: 518000 Guangdong city of Shenzhen province Baoan District Xixiang Street Phoenix Gang community ICT company plant No. 1 building 2-4 Patentee after: Shenzhen City Weifu Communication Technology Co., Ltd. Address before: Guangdong city of Shenzhen province Baoan District 518102 China Industrial Zone guwu hang Cheng Da Dao Technology Park E block 1 floor West Patentee before: An accurate Hardwear Pty Ltd. is pushed up by Shenzhen |