摘要: A simple, transportable, automatic aircraft surveillance radar for use in the limited warfare environment is described. System operational requirements are established, basic system defined, and design trade-off analyses performed... 展开 A simple, transportable, automatic aircraft surveillance radar for use in the limited warfare environment is described. System operational requirements are established, basic system defined, and design trade-off analyses performed to arrive at the optimum system configuration. Areas of investigation include typical target bistatic cross section, doppler and doppler rate, direct signal and low altitude target propagation effects, spectral purity requirements, performance monitoring, environmental conditions, signal processor optimization, detection probability communications reliability, and component reliability. Preliminary designs are evolved for the antenna, power amplifier, frequency generator, low noise front end, doppler processor, power amplifier, and antenna mast subsystems. Integrated circuits and active filtering are used throughout to minimize equipment size and weight. Breadboards of the power amplifier and doppler processor were built to establishing solid state feasibility. The system employs multiple site, bistatic, CW operation to provide electronic fence-like coverage. Basic site units are designed for ease of emplacement, high probability of target detection, and long periods of unattended operation. 收起