Abstract: An electromagnetic radiation monitor for use in close proximity with the human body comprised of an electromagnetic radiation sensor for detecting hazardous radiation levels. The radiation monitor also includes means for shielding the sensor from electromagnetic interference caused by the human body. A single layer of a plurality of lossy materials arranged in a precise, predetermined mosaic pattern is used in conjunction with a shield to prevent interference due to unwanted reflections caused by the shield resulting in a wideband frequency response previously unachievable.

Abstract: Electromagnetic radiation monitor for use in close proximity with a human body. The monitor includes electromagnetic radiation sensors and shielding disposed behind the sensors which defines a radiation barrier between the monitor user and the sensors. A layer of uniform lossy material is disposed between the sensors and the shield for preventing reflective interference from the shield.

Abstract: A monostatic frequency modulator continuous wave radar for detecting and determining the distance to near range objects. A temperature compensated one port Z-network is provided to generate a voltage of equal magnitude and opposite sign to that of the voltage reflected from the antenna.

Abstract: A monostatic frequency modulator continuous wave radar for detecting and determining the distance to near range objects. A temperature compensated one port Z-network is provided to generate a voltage of equal magnitude and opposite sign to that of the voltage reflected from the antenna.

Abstract: A range detection apparatus comprising means for generating high frequency energy over a finite frequency range and for frequency modulating over a limited range of bandwidth the generated signal. A first path provides a phase reference while a second path provides for transmitting and receiving the signal. Along one of the two paths, the frequency modulated signal is phase shifted at a plurality of predetermined frequency values over a finite frequency range of bandwidth and at a predetermined plurality of phase-shifting values (greater than two) and at combinations of phase-shifting and frequency values to improve the relative range resolution. The signal in one path is phase compared to the signal in the second path to produce range measurement signals related to the combined phase shifts of the two paths, the results of the phase comparison, and the combinations of phase states of the phase shifts and frequencies of the frequency modulated signal.