Passive microwave speed and intrusion detection system

A system for passive microwave detection of at least one of temperature, speed and a first source of microwave radiation, comprising:

• a first receiver configured to detect a first passively received microwave radiation signal from the first source of microwave radiation, a first voltage peak signal level of said first passively received microwave radiation signal being indicative of a first temperature of said first source;
• the first receiver being configured to detect a second passively received microwave radiation signal from the first source later in time, a second voltage peak signal level of said second passively received microwave radiation signal being indicative of a second temperature of said first source of said second passively received microwave radiation signal, a frequency of said received first and said second passively received microwave radiation signals being within a range of frequencies protected from active transmission in a geographic area encompassing a location of said first receiver;
• a signal processor, said signal processor being configured to receive said first and said second passively received microwave radiation signals from said first receiver and being further configured to convert said first and said second passively received microwave radiation signals to first and second voltages, respectively, said signal processor further being configured to calculate a voltage signal height representing temperature of said first source and a passively received microwave signal duration indicative of a duration of time of said first source traveling within a receiving parabolic antenna lobe of the first receiver;
• the signal processor calculating an average speed of said first source within said receiving parabolic antenna lobe from the difference in time between receipt of said first and said second passively received microwave radiation signals and a distance of travel of said first source within said receiving parabolic antenna lobe where speed of said first source is said first source travel distance divided by the time duration between receiving said first and said second passively received microwave radiation signals.

A method for detecting at least one of temperature and speed of an automobile serving as a source of microwave radiation signal using passive reception of microwave radiation, comprising:

• receiving a microwave radiation signal from said source at a passive microwave receiver, said passive microwave receiver including at least one antenna having a receiving antenna lobe, a voltage level of said received microwave radiation signal being indicative of a temperature of said source, the frequency of operation of said passive microwave receiver being a World Administrative Radio Conference (WARC) protected frequency between 0.5 and 2 GHz;
• storing a receiving antenna lobe pattern in memory comprising the locations of the receiving antenna lobe boundaries that the source of the microwave radiation signal crosses based on received signals at the at least one antenna having said receiving antenna lobe,
• measuring a passage of time said source of the microwave radiation signal travels within said receiving antenna lobe, and
• calculating a speed of said automobile source from said passage of time and a distance along the highway between the boundaries of the receiving antenna lobe traveled by said source of microwave radiation signal.