Antennas tend to be multi frequency, multi-mode an

2022-05-20
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Antennas tend to be multi frequency, multi-mode and miniaturized to meet the challenges of multi operation

at present, with the rise of 4G network construction in the world, multi operation has become the main theme of the development of operator network. The base station also develops towards the combination of macro station and micro station with the change of network. The antenna that is part of the base station will also change with the base station. Supporting multi frequency, multi-mode and miniaturization is becoming the development direction of antenna

base station antenna faces multiple challenges

antenna is an important part of mobile communication system, which is directly related to the coverage and quality of service of mobile communication network. For example, call loss rate, call drop rate, handover success rate, etc. As the basic means of controlling wireless network coverage, the selection and setting of antenna plays a vital role in improving network performance

operators have been facing a variety of challenges in base station antenna. First, when the service life of the antenna expires, operators will face the problem of reducing the quality of old antennas. Secondly, the antenna is over covered, the antenna size is too large, it is difficult to enter the property, and the resource and space of the antenna installation site are in short supply, which is becoming the restriction of the traditional antenna. At the same time, as users have more and more strict requirements for network experience, antenna optimization, concealment of antenna faults and great difficulty in detection are the key problems to be solved for network optimization

and the emerging multi coexistence scenario also puts forward higher requirements for the base station antenna. Taking China Mobile as an example, the coexistence of GSM, TD-SCDMA, TD-LTE and WiFi has basically taken shape. Multi coexistence means that building its own base station for each network will greatly increase the construction cost. With the rapid growth of land price and the significant increase of the cost of new base stations, Mo element can significantly improve the quality of surfacing cladding layer. In an interview, relevant experts said that due to the shortage of station site resources, when selecting the station site, a large number of base stations are built in the same area. If there are omissions in the planning, it will cause interference between stations and affect the network stability

for the above reasons, multi network and common stations, even multi operator common stations, have become the main construction mode of international operators. As the complexity of wireless communication system increases, more frequency bands and modes are used. This requires the corresponding increase in the frequency band and mode supported by the antenna, but the placement position of the antenna on the base station is very limited. The dual requirements from the location of network and base station have become the inevitable choice of multi frequency and multi-mode of the same antenna branch

Huawei experts said that after the large-scale application of 4G, 2G, 3G and 4G will coexist for a long time, which will bring great difficulties to the deployment of base station antennas. Many stations will face the situation that they cannot add base station antennas. In the 4G era, it is necessary to accelerate the evolution of base station antenna to broadband, multi frequency and multi-channel, so as to simplify site installation, make full use of site resources and adapt to the development of multi antenna technology

Yang rougang, manager of antenna product management department of Asia base station of anfushi radio frequency system (Shanghai) Co., Ltd., said that at present, the biggest problem for operators to build base stations is the shortage of space resources for installing antennas. It is necessary to use more multi frequency antennas to replace the previous single frequency space lines, so that the experimental machines with limited space resources of less than 1 ton can basically accommodate more frequency bands for conventional electronic universal experimental machines

towards miniaturization

with the advent of 4G era, higher requirements are put forward for coverage efficiency and spectrum utilization. The development of smart antenna technology, which appeared in the 3G era, effectively complements the diversified antenna needs of operators, effectively suppresses interference, improves spectrum utilization and improves system capacity

however, smart antenna technology can not change the current situation of tight sector position of base station antenna. Therefore, miniaturization has become the trend of antenna development in the future. The demand for antenna miniaturization makes the antenna design develop towards small size and low paraboloid, effectively reduces the weight of the antenna and makes it easy to install and maintain. By reducing various protection, alarm measures and safety interlocking devices of experimental equipment, it should be perfect and reliable, reduce its wind load, reduce the impact of environmental factors on network coverage, and meet the construction requirements of multi system common station and more system common antenna of operators. At the same time, the integrated design of wireless base station can effectively reduce feeder loss, improve system capacity and improve system performance

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