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4 metres long antenna for kenwood TKR 850 repeater
4 metres long antenna for kenwood TKR 850 repeater

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4 metres long antenna for kenwood TKR 850 repeater

how to choose right repaeter antenna?

Repeater antenna in the whole communication system has a key role, especially as the communications hub of the communication stations. High-gain antenna will not only increase the coverage area of radio waves, but also has some of the received signal amplification, can be better to receive weak uplink signals, to improve the mobile station and base station wireless communication quality. Under normal circumstances the base station are equipped with high-gain antenna, the interference situation can be considered according to the actual installation of narrow-band filter to reduce interference. Common repeater antenna fiberglass antenna, Victoria array antenna, directional antenna. Fiberglass Omni Antenna for the basic non-directional antenna for base station location in the case of the central area communication networks. Because fiberglass antenna easy to install, it is widely used in various types of base stations. FRP can reach a maximum antenna gain of about 10db, the higher the gain the longer the antenna, usually a gain of 5-6db gain antenna length of glass and steel prices more competitive, more mature manufacturing processes, using more. In addition to electrical properties of such antennas, the outer layer of fiberglass radome there is a large difference in quality, some low-quality products in the wind and the sun outer glass after one year the situation will result in cracking the whole antenna, scrapped, a number of brand-name manufacturers FRP more secure in the quality of the antenna. Directional antenna is equivalent to more focused direction to a direction of energy fired up, with the main direction of radiation characteristics of high gain, Yagi antenna is used. Yagi antenna, the more the number of cells the higher the gain, long-distance communication and for point to point edge in the sub-station communication network used. More suitable for targeted police stations in remote areas, contact with the superior branch used, used properly the effect will be better than the fiberglass antenna array antenna is characterized by Victoria under high power, high gain, gain adjustable direction for communications hub (Branch and Urban and relay stations) to use, but its price is relatively high. Ring oscillator array antenna transmitting direction of the four adjustable, when the 90-degree intervals of four oscillator installed base for the omni-directional antenna characteristics, when all four oscillator installed in the same direction with a directional antenna characteristics, while the gain in the main radiation increased. The direction of use of its adjustable gain feature can better adapt to the irregular service area. If the Ring Array Antenna gain is not high enough to consider eight-ring array antenna, which features a similar array, but with the City of Victoria provides a higher gain. Victoria General 350MHZ frequency gain matrix 8db (omni-directional) / 10db (orientation), a gain of eight-ring array 12db (omni-directional) / 15db (orientation).

repaeter antenna in use

 

 

 

   

 

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