Light Control Of Phased Array Radar, Optical Receiver Technology Research And Implementation

Compared with traditional phased array , optically controlling phased array has many merit. In this paper, the features of optically controlling phased array and the development of optically controlling phased array are involved. And the signification and value of studying optically controlling phased array is also mentioned. Optical fibre communication is the foundation of optically controlling phased array. So the development level of optical fibre communication influences the development of optically controlling phased array. The recent progress of optical fibre communication and the configuration of optical fibre communication system are introduced in this paper.The feature and realization method for each part of the optical receiving system are discussed in detail so that a optical receiving system with good performance can be obtained for optically controlling phased array .This paper contains these materials such as the features and types of optical fibers , the configuration of optical fibre communication system and the merit of optical fibre communication. This paper also includes the principles of optical detectors and their electronic properties, and the circuit designing methods for detecting and amplifying RF signal and filtering.Pre-amplifier used in optical receiver is discussed in detail. The performance of pre-amplifier , the classification of pre-amplifying circuit and how to select transistor in pre-amplifier are discussed . Two schemes, using MMIC and using discrete component(PHEMT) ,are adopted in designing pre-amplifier respectively.The important process during using discrete component (Phemt) to design a pre-amplifier includes the judgement of stability and the means of stabilizing. The design of bias network and match network are very important in the progress of designing pre-amplifier with discrete component. The performance of pre-amplifier is decided by match network and bias network. When one parameters achieve its best value, the other will go worse, this will be considered in this paper. The theories and designing method about microstrip band-pass filter are also discussed in chapter 5. The software, ADS, is used for designing microstrip bandpass filter with hairpin structure. Several microstrip structures which are often used to design microstrip filters are shown.An experimental system of optical receiver in L-band is designed. The performance curves for whole system(include optical emmiting system) and the unit circuit containing FET amplifier are shown respectively.