What are the advantages of a horn antenna?

The horn antenna is what we know as the "surface antenna", and it has a variety of classifications, such as ridge waveguide horns, conical horns and so on. The horn antenna belongs to the most widely used microwave antenna in China, and its radiation field is different from other antennas, mainly through the size of the horn and the propagation type to determine the radiation area and location. The horn wall inside the horn antenna has a certain radiation effect, so we must not install the horn antenna too close to the human body, just use it safely.

Introduction about the advantages of horn antenna

1) Improve the signal interference ratio, improve the communication quality, use the main lobe of the narrow beam to receive and transmit signals, side lobes and zero point to suppress the interference signal, can reduce the system interference, improve the output signal-to-noise ratio of the array, that is, improve the anti-interference ability of the system. In addition, it also has a certain weakening effect on multipath interference in mobile systems, so the communication quality is greatly improved.

(2) Increase system capacity and increase the number of communications

Smart antennas use narrow beams to receive and transmit mobile user signals, reducing the interference of other users, so for self-jamming systems (such as: CDMA systems), it can effectively increase the system capacity; At the same time, the use of space division technology to multiplex channels also increases the system capacity.

As we all know, CDMA system is a self-jamming system, and its capacity limitation mainly comes from the interference of this system. That is to say, smart antennas use narrow beams to receive and transmit mobile user signals, reducing the interference of other users, which is extremely important for CDMA systems and can greatly increase the capacity of CDMA systems. The use of smart antennas in CDMA systems provides the possibility to fully utilize the resources provided by all spread spectrum codes, making the CDMA system capacity at least double.

(3) Expand the communication coverage area and improve the spectrum utilization

For wireless base stations that use ordinary antennas, the coverage of their cells is completely determined by the radiation direction pattern of the antenna. Of course, the radiation direction pattern of the antenna is designed according to the needs. However, after on-site installation, unless the antenna is replaced, its radiation direction pattern is impossible to change and difficult to adjust. However, the radiation pattern of the smart antenna array can be completely controlled by software, and it is very convenient to optimize the original coverage by software when the network coverage needs to be adjusted or the original coverage is changed due to new buildings, etc. Moreover, the use of smart antenna technology instead of ordinary antennas improves the spectrum multiplexing rate in the cell, and with the growth of mobile communication demand, it is possible to increase system capacity and reduce operator costs on the basis of no new or as few base stations as possible.

(4) Reduce the transmission power of the base station and reduce electromagnetic environment pollution

In wireless base stations that use ordinary antennas, the transmitted signal uses a high-power amplifier (HPA); The smart antenna is used in TD-SCDMA, because the gain of beamforming can reduce the requirements for power amplifiers, greatly reduce the transmission power of the base station, and also reduce electromagnetic environment pollution.

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