Electrically adjustable antenna modulation and demodulation communication system

Abstract

The invention discloses a tunable antenna modulation-demodulation communication system which comprises a plurality of tunable antenna modulation-demodulation control devices. The tunable antenna modulation-demodulation control devices are connected through coaxial antenna feeder electric cables. Each tunable antenna modulation-demodulation control device comprises a composite signal control circuit and a coaxial signal transmission connecting cavity component which are connected to achieve data double-way transmission. The tunable antenna modulation-demodulation communication system can achieve effective composition of a direct current power supply signal, a tunable antenna control signal and a tunable antenna radio-frequency signal, radio-frequency spectral bandwidth is 645-2700MHz, current 2G and 3G mobile communication spectrum resources are compatible, cost of mobile communication base station building is really lowered, and reliability of mobile communication base station tunable antenna control is improved.

Description

technical field [0001] The invention relates to an electronically adjustable antenna modulation and demodulation communication system, which belongs to the technical field of communication transmission and control. Background technique [0002] At present, with the rapid development of mobile communication technology and the development of data communication and multimedia service requirements, in order to better meet the needs of mobile data services, mobile computing and mobile multimedia services, mobile communication technology has begun to move towards the fourth generation mobile communication technology (4G) start to rise. The development and replacement of all technologies cannot be realized and completed overnight, from the first generation of analog communication technology to the second generation of digital mobile communication: (2G) technology GSM, GPRS, and then to the third generation of mobile communication (3G) ) Technology: WCDMA, CDMA2000, TD-SCDMA, and t...

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Problems solved by technology

[0003] The current mobile communication base station antenna system transmits radio frequency signals through an independent feeder cable, and another cable transmits the control signal of the remote electric adjustable mobile antenna separately. In this way, the same electric adjustable antenna system needs to use two feeder cables and control cables during base station construction. Cables are used for signal control and radio frequency transmission of the antenna system, which increases the construction cost of the mobile communication system, increases the construction cost and maintenance difficulty, and has certain maintenance safety hazards

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