Cassegrain Transceiver Integrated Antenna and Transceiver Integrated Method Based on Optical Fiber Array

Abstract

The invention provides a Cassegrain receiving and transmitting integrated antenna based on an optical fiber array. The Cassegrain receiving and transmitting integrated antenna comprises a crescent correction mirror and a primary reflector, the crescent correction mirror and the primary reflector are arranged at the two ends of a clamping type antenna body, a secondary reflector and a second barrier are arranged in the center of the mirror face of the crescent correction mirror, a first barrier is arranged in the center of the primary reflector, a receiving optical fiber disc is arranged in the first barrier, a coupling optical fiber is fixedly arranged in the receiving optical fiber disc, an end opening of the first barrier is connected with a transmitting optical fiber disc, a transmitting optical fiber is fixedly arranged in the transmitting optical fiber disc, and the transmitting optical fiber is connected with a one-to-four optical fiber branching device. A receiving and transmitting integrated method comprises the steps that an optical signal is divided into four paths through the one-to-four optical fiber branching device; the mounting parameter of the transmitting optical fiber is calculated; a self-focusing lens is glued at the tail end of the transmitting optical fiber; the transmitting optical fiber disc is manufactured, and the transmitting optical fiber is fixed; the receiving optical fiber disc is manufactured, and the coupling optical fiber is fixed; the transmitting optical fiber disc and the receiving optical fiber disc are installed in the clamping type antenna. The transmitting power of the clamping type antenna is improved, receiving and transmitting integration is achieved, installation is convenient, the size is small, and the communication distance is long.

Description

technical field [0001] The invention belongs to the technical field of wireless laser communication devices. The invention relates to a Cassegrain transceiver integrated antenna based on an optical fiber array. Background technique [0002] Wireless laser communication (FreeSpaceOptic, FSO) is a communication method that uses light as a signal carrier and an atmospheric channel as a propagation medium. The optical antenna is an important part of the FSO system. The optical antenna must be able to receive the optical signal of the other terminal and also be able to transmit the optical signal of the local terminal. The research and design of high-efficiency transceiver integrated antenna has become a hot research issue, and system design using optical fiber devices such as optical fiber and optical fiber splitter / combiner is one of the methods to realize the integration of transceiver. The optical antenna in the FSO system is generally a telescopic system. The Cassegrain tel...

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Problems solved by technology

None of the above research results involves the integration of transceivers, and additional devices (such as cone mirrors or diffraction elements) are required to change the energy distribution of the beam. For a compact card antenna, it is difficult to realize the integration of transceivers and antennas after the optical path passes through additional devices. Difficult and expensive to install

[0004] In terms of optical antenna transceiver integration, Yang Huajun from the University of Electronic Science and Technology of China uses optical devices such as collimation systems, optical isolators, and splitter prisms to realize transceiver integration after the focus of the card antenna. This solution has complex optical paths and requires high installation accuracy. The huge size and high cost of the equipment are not suitable for civilian wireless laser communication equipment (Yang Huajun. Design and implementation of high-precision laser beam alignment and optical antenna in space optical communication [D]. University of Electronic Science and Technology of China, 2007.); Beijing University of Posts and Telecommunications Wang Hongfeng used the transmissive Galileo telescopic system as the transmitting antenna and the reflective Gregorian system as the receiving antenna, and fixed the transmitting antenna at the position blocked by the secondary mirror of the receiving antenna to realize the integration of transmitting and receiving. This system requires strict control of the optical axis of the transmitting and receiving antenna. Calibration, but in engineering practice, there must be an angle between the receiving and receiving optical axes, so the method of transmitting and receiving split optical paths is not suitable for long-distance wireless laser communication systems (Wang Hongfeng. Design of free-space optical communication systems and research on optical antennas[ D]. Beijing University of Posts and Telecommunications, 2004.)

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