Radio remote unit of electrically adjustable antenna and electrically adjustable antenna integrating radio remote unit

Abstract

The invention relates to a radio remote unit of an electrically adjustable antenna, which is characterized in that the radio remote unit comprises a physical interface circuit, an intermediate frequency processing circuit, an A / D and D / A conversion circuit, a frequency conversion circuit, a synthesis / distribution network, a controllable phase shifter and a transceiving module, downlink signals sequentially pass through the physical interface circuit, the intermediate frequency processing circuit, the A / D and D / A conversion circuit, the frequency conversion circuit, the synthesis / distribution network, the controllable phase shifter an the transceiving module, and uplink signals sequentially pass through the transceiving module, the controllable phase shifter, the synthesis / distribution network, the frequency conversion circuit, the A / D and D / A conversion circuit, the intermediate frequency processing circuit and the physical interface circuit. The radio remote unit has the advantages of compact structure, simple installation, low power consumption and high performance. The invention further relates to the electrically adjustable antenna integrating the radio remote unit, which comprises the radio remote unit RRU and an antenna part and is characterized in that all or part of the functions of the radio remote unit RRU are integrated in the electrically adjustable antenna. The electrically adjustable antenna integrates all or part of the functions of the RRU, thereby leading the overall performance to be more excellent and leading the installation to be simpler.

Description

(1) Technical field: [0001] The invention relates to a radio frequency remote device of an electric adjustable antenna and an electric adjustable antenna integrated with the radio frequency remote device. (2) Background technology: [0002] The front end of the wireless access network in the existing mobile communication system is composed of base station equipment and antenna feeding parts. The base station equipment is generally installed indoors, and the antenna is installed on the top of the tower. figure 1 As shown, they are connected by a long RF coaxial cable. At the same time, in order to improve network communication quality during network operation, it is necessary to conveniently adjust the coverage of the base station, so a large number of electrically adjustable antennas are used. The principle of the electronically adjustable antenna is to drive the phase shifter to move and change the phase of each signal by controlling a drive motor, so a set of transmission mecha...

AI Technical Summary

Problems solved by technology

The above-mentioned traditional working mode has the following disadvantages: First, as the new generation of mobile communication systems adopts higher frequencies, the loss of radio frequency cables will become very large, and the cost of cables is high, and installation is difficult; second, with the mobile With the continuous development of communication networks, the number density of base stations will gradually increase, and the site selection of base stations will also face greater difficulties. The installation point not only needs to be suitable for the outdoor environment where the antenna is installed, but also needs to have a place suitable for indoor equipment installation, and the antenna and indoor The equipment should not be too far apart; finally, the cost of transmission, drive and corresponding control devices to realize the function of electric adjustment is high and the reliability is low

The above-mentioned technical solution using remote radio equipment does not fundamentally change the working mode of traditional base stations, mainly reflected in: 1) It still needs a high-power low-efficiency transmitting power amplifier, so it consumes a lot of power and costs high, and it works outdoors reliably Low; 2) It is still necessary to additionally control the motor of the electronically adjustable antenna and related complex control components, so there are also disadvantages of high cost and low reliability; 3) RF cables still need to be connected between the RRU and the antenna, and there is a large loss , and the cost of the cable is high and the installation is difficult

4) After the uplink signal is received by the antenna element, after passing through the feeding and phase-shifting network, it is fed to the transceiver module of the RRU through the radio frequency cable, the signal loss is large, and the receiving sensitivity of the system is reduced

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