Security is one of most important humanity challenges nowadays. Some techniques have been introduced to improve the security of strategic places such as borders, airports, military sites, museums, factories and so on. Microwave intrusion detection systems for perimeter protection are one solution. The system consists of a bistatic transmitter and receiver. If an intruder enters the detection zone and obstructs the path, the received power will change. By analysis of the received power level the system can detect real intrusion or false targets. In this thesis, we introduce the microwave intrusion system specifications and parameters and two methods of power level processing. Using some suitable propagation models we estimate the received power in rest condition and at the presence of an obstacle (say a human). The transmitter and receiver circuits are designed and simulated using ADS and their layouts are presented. Finally some suggestions are made for improving the system quality and reliability.
