Active optical antenna, microwave transmission system and method for transmitting information

Abstract

The embodiment of the invention discloses an active optical antenna, a microwave transmission system and a method for transmitting information. The active optical antenna comprises a base, a ground plane, power-supply grids, a plurality of antenna elements, photodetector pipes and an optical waveguide, wherein the ground plane is arranged at the bottom of the base; the power-supply grids and the antenna elements are arranged on the top of the base; the photodetector pipes are arranged in the base and positioned between the antenna elements and the ground plane; the power-supply grids supply power to the photodetector pipes; the number of the photodetector pipes is equal to the number of the antenna elements; the output terminals of the photodetector pipes are coupled to the antenna elements for outputting radio-frequency signals; and the optical waveguide is arranged in the base and connected with the photodetector pipes. By adopting the embodiment of the invention, the cost of the antennas is reduced and the integration level is improved; moreover, since the signal to be transmitted which is received by the antennas is an optical signal, the light splitting can be completed by a planar lightwave circuit technique so that the distribution of the optical power can be completed in an optical domain, and the matching and the attenuation of an electrical signal distributing network are avoided.

Description

technical field [0001] The invention relates to a communication system, in particular to an active optical antenna, a microwave transmitting system and a method for transmitting information. Background technique [0002] As a traditional communication method, microwave has played an important role in the field of communication. Microwave has inherent advantages such as simple deployment, low cost, and long transmission distance. With the continuous development of communication networks, microwave still has a very wide range of applications, especially in the backhaul of mobile base stations and remote areas with complex terrain. Microwave is being widely used due to its own advantages. With the continuous increase of transmission data traffic, the traditional microwave frequency band is becoming more and more crowded. In order to improve the transmission bandwidth of microwave, the industry has found a new spectrum frequency band of E-band microwave (E-BAND): 71-76GHZ / 81-86G...

AI Technical Summary

Problems solved by technology

[0004] Usually, the conversion output power of the PD tube is relatively low, and directly connecting the RF signal converted by the PD tube to the antenna often cannot meet the requirements of the transmission power. Therefore, it is necessary to increase the amplifier, and each additional device will make the antenna system Lower integration and higher costs

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