1. Overview of 4.5M Prime Focus Antenna
Antesky ATSK-450CK-RC 4.5-Meter is a aluminum parabolic prime focus antenna, reliable antenna system that will operate at C-band / Ku-band frequencies with high efficiency and at the same time successfully withstand the effects of the environment. This antenna adopts reflector which consist of precisely formed aluminum plate with matched back structures and hub assemblies for the easy installation. The reflector is supported by a galvanized steel kingpost that provides the required stiffness for pointing and tracking accuracy, and it can be installed on the ground or rooftop.
2. Key Features and production technology of 4.5M Prime Focus Antenna
Features:
- Parabolic receive only antenna with front feed;
- Single kingpost type pedestal;
- Manual adjustment;
- High gain, low sidelobe, high cross-isolation;
- C/Ku band, linear/circular polarization.
Process:
- The antenna reflectoris stretched and molded by aluminum sheet to ensure the high precision of the antenna reflector.
- Three test methods are used to ensure high-quality delivery of antennas: reflectoraccuracy test, assembly test, electrical performance test.
- Pre-treatment: antenna panel cleaning and degreasing; steel structure parts are zinc-blasted, sand-blasted or hot-dip galvanized.
- Surface treatment: apply zinc yellow primer first, then white topcoat, double protection, improve antenna anti-corrosion ability.
High Precision Reflectors
The main reflector of this antenna is shaped parabolic type, which is stretched by rust-proof aluminum alloy. And the back structure is made of high-strength aluminum alloy, which all make the antenna have strong wind resistance and adequate strength to assure the reflector precision.
High Wind Resistance & High Anti-Seismic
In order to improve the reflector precision, wind resistance and anti-seismic grade of antenna, the back structure, pull rod and sub-reflector bracket all adopt rectangular steel tube design and have position pins at key position. The steel components, such as antenna pedestal and back structure, all adopt hot-dip galvanizing or hot zinc-spraying firstly, and then treat with finishing coat, which all strengthen the corrosion resistance ability of antenna.
Antenna back structure&Hub
According to panels segments, 4.5m antenna has 12 back structures in total. Each back structure and pull rod are made of round steel pipe. One end of back structure is connected with hub, and the other end is connected with panels. Among these, there are position pins to fix at the key connection positions of back structure, panels and hub. This design provides stable support structure for the antenna reflectors, which not only keeps the antenna surface accuracy but also improves the wind and seismic resistance of antenna.
The high performance of feed system
The antenna feed system consists of conical corrugated horn, transition waveguide, phase shifter and duplexer etc. The conical corrugated horn will produce symmetrical and near-perfect spherical wave through elaboration and processing. Its low sidelobe level keeps the fine electrical performance of antenna, such as high efficiency, low sidelobe, low noise temperature and low cross polarization level etc.
3. Technical specification of 4.5M Prime Focus Antenna
| ELECTRICAL SPECIFICATION | ||
| Diameter | 4.5M | |
| Operating Frequency, GHz | C-Band | Ku-Band |
| Receive | Receive | |
| 3.625～4.2 | 10.95～12.75 | |
| Gain, Mid-band, dBi | 43.2 | 53.1 |
| -3dB Beamwidth | 1.2° | 0.42° |
| VSWR | 1.35:1 | 1.25:1 |
| Polarization | Linear/Circular | Linear |
| XPD (on Axis), dB | ＞30dB(Linear) | ＞30dB |
| Antenna Noise Temperature, 4-port feed
20° Elevation |
41°K |
45°K |
| Feed Interface | CPR-229 | WR-75 |
| Port | 2/4 port | |
| First Side,dB | -14 | |
| Mechanical Specification | ||
| Antenna Type | Feedforward Antenna | |
| Antenna Drive Mode | Manual/Motorized | |
| Azimuth | 0~360° (Continuous) | |
| Elevation | 5°～90°(Continuous) | |
| Finishes
Reflector Surface Pedestal & Back Structure |
Aluminum panels with high-diffusing white paint Hot dip Galvanized Zinc |
|
| Surface Accuracy (RMS) | ≤ 0.5mm | |
| Environmental Specification | ||
| Operational Wind | 80km/h | |
| Survival Wind | 200km/h | |
| Temperature | – 45°C ～ + 50°C | |
| Relative Humidity | 0%～ 100% | |
| Solar Radiation | 1135Kcal/ h/ m2 | |
| Seismic (Survival) | 0.3g (H), 0.15g (V) | |
4. Component introduction of 4.5M Prime Focus Antenna
5. Assemble guidance of 4.5M Prime Focus Antenna
Pouring foundation firstly, and then install based on installation manual.
6. Package & shipping dimension of 4.5M Prime Focus Antenna
- ANTENNA
No. Name QTY Dimension(L x W x H)mm G.W(kg) N.W(kg) 1 4.5m antenna panel 1 2310*760*1330 415 378 2 Hub 1 780*780*860 118 81 3 Back structure 1 2340*810*1390 237 200 4 Pedestal 1 1910*910*1000 218 181 Total 4 7.23CBM 988 840
7.Project cases of 4.5M Prime Focus Antenna
4.5m C & Ku band antenna in Vietnam
4.5m TVRO antenna in Mongolia
4.5M Prime Focus Antenna in Singapore
4.5m TVRO antenna in Thailand
4.5M Prime Focus Antenna in Seychelles
4.5m TVRO antenna in Papua New Guinea
Antesky 4.5m receive only antennas is used in IPTV project in Mogolian,the customer satisfy Antesky’s products, installation works and after-sale-service. Mogolian customer are always contacting with us for future project. Antesky are willing to be together with the customer to finish some IPTV projects, if some customers would like to do this kind of project,welcome to talk to us.
4.5M Prime Focus Antenna Feed Back from Russia
On behalf of Antesky in July of the year 2014 Russian customer purchased 4.5m TVRO antenna from our company, after installing the antenna, the customer feedback to us that there’s no problem for our 4.5m TVRO antenna.
