CN1069833A - Method with building parabolic antenna for ground TV satellite station with building roofing - Google Patents
Method with building parabolic antenna for ground TV satellite station with building roofing Download PDFInfo
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- CN1069833A CN1069833A CN 91105755 CN91105755A CN1069833A CN 1069833 A CN1069833 A CN 1069833A CN 91105755 CN91105755 CN 91105755 CN 91105755 A CN91105755 A CN 91105755A CN 1069833 A CN1069833 A CN 1069833A
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Abstract
The present invention utilizes strong directional aerial battle array to determine the position of parabolic location annulus, with the location annulus is that benchmark is made parabolic with the pattern moulding, thereby guarantee that parabolic antenna points to and can accurately to satelloid and parabolic surface enough accuracies of manufacture be arranged, the parabola that uses construction material to build up at parabolic surface laying wire netting has the ability of reflection electromagnetic wave then.Enforcement of the present invention can cause the decline significantly of satellite television receiving antenna cost, has avoided the trouble of general parabolic antenna manufacturing, transportation, installation, debugging.
Description
The invention belongs to the tv broadcasting technology field, purpose is to improve the satellite television quality of reception, reduces the price of satellite television receiving equipment, and satellite television broadcasting and this High-Tech result of reception are applied quickly in China.Satellite TV ground receiving station in the past, adopt tabular or netted receiving paraboloid, this antenna costs an arm and a leg, complex structure, be that satellite television receives the part of spending most in the complete set of equipments and the groundwork in the Installation and Debugging, if can adopt the parabolic antenna of a cheapness to receive faint satellite TV signal, the expense of building satellite TV ground receiving station is greatly descended.The present invention sets out thus, and the mode of using building is at building building roofing receiving paraboloid, to reach the purpose that receiving equipment cheap and Installation and Debugging are oversimplified.
(to be positioned at 107.56 ° of east longitudes in Nandan County area just outside a city gate, Guangxi town, 24.98 ° of north latitude) build reception " Dongfanghong-II " number satellite with the present invention and (be positioned at overhead 35860 kilometers of equator, the parabolic antenna of 4 meters bores 87.5 ° of east longitudes) is an example, illustrates that the present invention adopts strong direction direction estimation antenna array to realize parabolic accurately location and be shaped with pattern making paraboloidal method.
As element antenna, the design size of element antenna is shown in figure (1) with backfire antenna for the direction estimation antenna array that the present invention adopts.The surface wave reflector of backfire antenna, side ring, little reflector are made with the aluminium alloy plate of thick 1mm, the centre post aluminum pipe of φ 10mm, director, feed oscillator insulation stator made of plastic are fixed in the above, and feeder cable is worn in public from tube hub, slow wave oscillator horizontal positioned.
Four backfire antennas are assembled into strong direction direction estimation antenna array, shown in figure (2).The direction estimation antenna array main lobe width of surveying the present invention's employing factually is that 1.10 ° of gains are 27dB.
At first making a diameter with angle steel is 4.1 meters annulus, it is 4.1 meters round building that the staircase on roof is built up an internal diameter, stay inclined to one side westwards 40 ° 51 of due south, 53 ° of 11 ' azimuths, the elevation angle '+breach (elevation angle, azimuth are calculated according to satellite and acceptance point longitude and latitude by relevant formula) of γ (γ for work as geomagnetic declination), annulus is loaded on the breach, load onto the cross strut, direction estimation antenna array is loaded onto at the strut center, and the antenna array signal is connect tuner, measured and amplify integrator, function recording instrument by coaxial cable output.Measure and amplify integrator circuit shown in figure (3).Satellite TV signal is received, is amplified through tuner by direction estimation antenna array, amplifies integrator amplification, diode peak detection, 50 μ electrochemical capacitor integrations output direct current signal through measuring again, with the Y-axis of measuring-signal input function instrument.
Finely tune the annulus position up and down, to satelloid, function recording instrument shows the satellite signal levels maximum until direction estimation antenna array center lobe.Cross strut and direction-finder antenna are taken off in the clamping rings position then.
According to the focal distance ratio (F/D) of employing feed, determine the focal length of institute's construction antenna.This example adopts the F/D=0.4 feed, so focal length F=0.4D is:
F=0.4 * 4.0=1.6 rice
Again according to parabolic equation Y
2=4FX draws the paraboloidal parabola bus equation X=Y that builds
2/ 4 * 1.6=Y
2/ 6.4.
Get Y=0, ± 0.2, ± 0.4, ± 0.6, ± 0.8, ± 1.0, ± 1.2, ± 1.4, ± 1.6, ± 1.8, ± 2.0(m), obtain corresponding X value:
X＝0，6.25，25.00，100.00，156.25，225.00，306.25，400.00，506.25，625.00（mm）
According to above data, make parabolic curve.
Be drawn on the plank as parabola, dig the parabola Outboard Sections along parabola, plank is fixed on the strut, bearing is loaded onto at two ends, makes the parabola template, as figure (4) shown in;
Template is contained on the annulus, promotes template and rotate in the annulus of location, then the parabola lower edge of template is rotated into parabola, shown in figure (5).
Build parabolic with construction process.Roughly weave into the net of paraboloidal with steel wire, mesh size is 10 * 10cm roughly, net is contained between circular stairs on the breach, press 1: 2: 3 mixed with cement, coarse sand, rubble, the concrete of becoming reconciled is spread out in one deck of smearing into thick 2～3cm on the net, based on the template lower edge, reserve the 1cm gap when smearing.
After treating 24 hours, concrete hardens substantially, with cement and fine sand by 1: 2 ratio with become sand-lime, be poured on concrete surface, slow rotary template makes surfacing.
After 24 hours, use No. 525 cement (not mixing sand) to be placed in the container again and stir, be poured on the sand-lime surface, till rotary template is extremely surperficial uniform and smooth with water.
Remove template and the location annulus, after 24 hours with straw screen or mat with ready-made surface coverage, the watering one week of maintenance, use the oilstone lapped face again, make it Paint Gloss, like this, the parabola of a standard has been made.
Parabola only has electric conductivity, could reflection electromagnetic wave, become the reflecting surface of reception antenna, and the present invention is at parabolic upper berth wire netting, is that the aperture is no more than 1/10 wavelength to the requirement of mesh.For example the carrier wavelength of " Dongfanghong-II " is that 0.075m is 75mm, so if receive " Dongfanghong-II " number, selecting the aperture for use is that the following wire netting of 7mm can meet the requirements.Make reflecting surface with wire netting, antenna efficiency is lower by 10～15% than plate antenna possibly, but because this antenna is cheap, can suitably increase bore to remedy the low slightly deficiency of antenna efficiency.
Load onto feed on ready-made parabolic reflector face, connect tuner behind the feed, finished so a feed forward type parabolic antenna is just made, feed is noted being installed on the parabolic center line, is focal length apart from parabolic minimum point.
Since satellite TV broadcast technology practicability, main research direction of satellite TV technology is exactly to be devoted to the cheap of receiving equipment, common research thinking one is that the power of raising satellite repeater is EIRP, the 2nd, reduce the tuner thermal noise, can both under the constant situation of the quality of reception, dwindle antenna aperture like this to reduce the receiving equipment expense, but these two kinds of methods all can be increased in investment on the other hand, and obtained effect also is subjected to the restriction of space technology and electronic technology development level, the antenna that the present invention builds with construction method is structurally muddy with building to be one, durable in use, with low cost, avoided large aperture antenna making, transportation, install, the trouble of debugging has been saved a large amount of metal materials.Enforcement of the present invention causes building the decline significantly of satellite TV ground receiving station expense.
Claims (4)
1, the invention belongs to the tv broadcasting technology field, the parabolic antenna that the scalable that general satellite television reception uses plate-shape metal or net metal to make is pointed to.The invention is characterized in:
(1) becomes building staircase building roofing the reflecting surface of parabolic antenna to come receiving satellite signal, perhaps whole building building roofing is become receiving paraboloid.For example the whole building roofing of an aedicula is become parabolic antenna, the satellite television that building is built as machine room receives relay base, also belongs to enforcement the present invention.
(2) using direction-finder antenna to determine the setting circle ring position, is that benchmark is built parabola then with the annulus, can be accurately to satelloid after finishing to guarantee parabolic construction.
(3) be that benchmark is made parabolic with the pattern shaping with the location annulus.
2, the employed location of claim 1 annulus is characterised in that: made by angle steel, the antenna aperture that diameter is built than desire is bigger, and whole annulus can be an integral body, also can be made up of segmentation, assembles during use, so that carry again.
3, the employed direction-finder antenna of claim 1 is characterised in that: by the antenna array that four Yagi spark gap backfire antennas are formed, each element antenna is square profile, and the square length of side is 195mm, and sharp-pointed to guarantee the direction-finder antenna main lobe, secondary lobe is not again too high.
4, the employed parabola template of claim 1, be characterised in that: lower edge makes parabolical veneer or sheet iron is loaded on the strut, and bearing is loaded onto at the strut two ends, so that rotate in the location annulus that angle steel is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105755 CN1069833A (en) | 1991-08-20 | 1991-08-20 | Method with building parabolic antenna for ground TV satellite station with building roofing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105755 CN1069833A (en) | 1991-08-20 | 1991-08-20 | Method with building parabolic antenna for ground TV satellite station with building roofing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1069833A true CN1069833A (en) | 1993-03-10 |
Family
ID=45879086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91105755 Pending CN1069833A (en) | 1991-08-20 | 1991-08-20 | Method with building parabolic antenna for ground TV satellite station with building roofing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1069833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861005A (en) * | 2018-12-26 | 2019-06-07 | 桂林长海发展有限责任公司 | Multiband crossing beams paraboloid direction-finder antenna |
-
1991
- 1991-08-20 CN CN 91105755 patent/CN1069833A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861005A (en) * | 2018-12-26 | 2019-06-07 | 桂林长海发展有限责任公司 | Multiband crossing beams paraboloid direction-finder antenna |
| CN109861005B (en) * | 2018-12-26 | 2021-01-26 | 桂林长海发展有限责任公司 | Multi-band cross beam paraboloid direction-finding antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C03 | Withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |