Pat.#3772697:		Base-band pulse object sensor system
INVENTORS:		Ross; Gerald F., Lexington, MA
ASSIGNEES:		Sperry Rand Corporation, New York, NY
ISSUED:		Nov. 13, 1973
FILED:		Apr. 19, 1971
ABSTRACT: A pulse transmitter-receiver system for detecting the presence and proximity of objects employs transmission of short base-band or subnanosecond electromagnetic signals and reception thereof by a dispersionless, broad band transmission line antenna system with a receiver circuit cooperating with a biased semiconductor diode located within the transmission line antenna system for instantaneously detecting substantially the total energy of each reflected base-band pulse and for providing corresponding outputs suitable for indication of the presence or of the range of such proximate objects. This system is intended to be primarily effective at distances of approximately twenty five feet or less.