Base station antenna and interference suppression in mobile communication

Coverage, capacity, and throughput are the three most important indicators for mobile operators. With the continuous development of mobile communication, the breadth and depth of network coverage have reached a fairly high level. However, in actual operation, operators often receive complaints from customers like “Why does my mobile phone have a signal but cannot make a call?” “Why is my mobile phone display connected, but the download speed is 0?” What is it? Reduced network performance, directly affecting the user experience? The culprit behind it is — interference.

For wireless communication systems, all non-useful signals can be considered as interference signals. The presence of interfering signals will directly reduce the signal-to-noise ratio (or carrier-to-interference ratio) of the system, resulting in a decrease in system capacity and a reduction in system throughput. However, as more and more mobile communication networks are deployed, large-scale use of devices such as wireless local area networks and personal hotspots, the wireless network environment becomes more complex, and wireless interference conditions are becoming more and more serious. Therefore, suppressing interference signals and reducing their impact on network performance are issues that every mobile network operator must face.

Huangjie Antenna is committed to providing a full range of base station antenna solutions for mobile operators and equipment manufacturers around the world, and has launched a series of base station products to solve the interference problems in the system for different scenarios of mobile communication networks:

1. Inter-area interference and high-side sidelobe suppression antenna

The lobe above the main beam of the base station antenna is called the upper side lobe, and the difference between the upper side lobe level and the main beam level is called the upper side lobe suppression. Generally, the network coverage is completed by the main beam of the base station antenna, and the upper side lobes above the main beam are directed to adjacent sectors. When the upper side lobes of the base station antenna are not sufficiently suppressed, the inter-cell interference is caused to the neighboring cells. In severe cases, even It will cause the receiver of the adjacent site to block, causing the site to crash.
Schematic diagram of the interference caused by the upper side lobes

In response to this problem, Mobi antenna has launched a series of high-side sidelobe suppression base station antennas, covering all mainstream mobile communication bands such as CDMA800, GSM900, DCS1800, PCS1900, WCDMA2100, LTE2600, etc., which can provide up-side sidelobe suppression up to 20dB. Compared with the common base station antenna, the interference signal caused by the upper side lobes is reduced by more than 70%. This series of products has been deployed in a large number of national networks of operators such as Japan, Thailand, and India, and has received good results.
2. Common site interference and high-antenna antenna

With the continuous increase of mobile communication network standards and frequency bands, the common site of different mobile communication systems has become the trend of the times. It has become common to install a number of antennas on the same communication tower or even on the same antenna pole. Since the space on the tower is small, the distance between the antennas is relatively close, and the base station transmits power is large, so the mutual interference of signals between different antennas is also very serious. In response to this problem, Mobi antenna has introduced a series of high-definition antenna series, covering all major mobile communication bands such as CDMA800, GSM900, DCS1800, PCS1900, WCDMA2100, LTE2600, etc., which can provide up to 35dB front-to-back ratio, effectively reducing the system on the tower. Inter-interference, greatly improve network performance, especially for WCDMA equivalent frequency networking systems. In addition, Mobi Gao before and after the antenna products are also selected by many network operators to cover the borders, in order to solve the problem of international roaming charges caused by the antenna back cover covering the borders of the people around the border.
In response to this problem, HJ Antenna has launched a large downtilt ESC antenna with a downtilt adjustment range of 5-25 degrees. The products support all mainstream mobile communication standards such as GSM, TD-SCDMA and TD-LTE, and can provide more The system has a total of antenna feeders, such as GSM+TD and other multi-port independent large downtilt ESC antenna products, which is the preferred solution for mobile network operators to deploy in high-site close-range coverage scenarios.

From：http://www.hj-antenna.com/station-antenna/