The microwave receiving area of an electronic system

In this paper, a method of measuring the receiving area of a given susceptible element within an electronic system by using the antenna measurement system and microwave network analyzer is presented. As an example, the receiving areas of a given point on the circuit board, which include Ar, the receiving area of the element, and Ar-max , the maximum receiving area when the given point is conjugated-matched, is measured. Measured results indicate that the receiving areas vary greatly with the frequency of the incident wave and the microwave coherent effect is obvious. Ar is dependent on both the impedance of the element and the radiation impedance of the circuit board while Ar-max is independent of the load, which gives approximate upper bounds on the power coupling of the given point on th