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AssigneeThe Queen's University of Belfast
InventorsJames A. C. Stewart, Brian M. Armstrong, Harold S. Gamble, John Mallon, Fabian C. Monds, William D. Ryan, James Wakefield
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A microwave generating and receiving module generates and transmits a microwave signal which is reflected by a moving target and received back by the module. The module comprises a disc-form Baritt diode BD1 or Gunn diode acting as both oscillator and mixer and forming part of microstrip circuitry and signal processing circuitry which processes the reflected signal to extract relevant target information. The signal processing circuitry can be physically displaced from the module and connected to it by a coaxial line. By operating the diode in the diplex mode the requisite target information can be provided for with a compact construction.
A microwave movement detector comprising a microwave generating and receiving module for use in generating and transmitting a microwave signal to be intercepted and reflected by a moving target and for receiving the reflected microwave signal from said target, wherein the microwave generating and receiving module comprises microstrip circuitry in combination with a diode acting as both an oscillator and a mixer, said detector further comprising modulating means for modulating the generated microwave signal so that quantitive information as to target range, velocity and direction can be obtained, whereby the detector operates in accordance with a diplex configuration, wherein said detector includes a transmitter for transmitting the modulated generated microwave signal, and wherein the modulating means repetitively switches the transmitter of the microwave generating and receiving module between two frequencies to provide a signal having two spectral lines separated by gaps between the frequencies.
Dependencies are inferred from the claim text.