Patent ID: 7705730

Claim:
A microwave intrusion detector, the system comprising: a multistage microwave sensing system configured to generate at least one output signal indicative of a presence of a moving object, the multistage microwave sensing system including multiple range bins for classifying microwave signals including a microwave alarm stage bin for determining an alarm state of the microwave intrusion detector a processor coupled to the multistage microwave sensing system to receive the at least one output signal; a memory accessible by the processor; a range determination module stored in the memory for execution by the processor to determine an estimated target range based on a state of each of the multiple range bins; a microwave alarm stage bin sensitivity calculation module stored in the memory for execution by the processor to determine an optimal microwave alarm stage bin sensitivity level based on the estimated target range and an alarm relay operable to trigger an alarm based upon the alarm state indicating a security violation.