Accession Number : AD0877569

Title :   Picosecond Pulse Antenna Techniques.

Descriptive Note : Technical rept. 21 Jan-20 Jul 70,

Corporate Author : SPERRY RAND RESEARCH CENTER SUDBURY MA

Personal Author(s) : Susman, Leon ; Lamensdorf, David

Report Date : OCT 1970

Pagination or Media Count : 70

Abstract : The report contains the results of an investigation into techniques for efficiently radiating and receiving unmodulated waveforms of picosecond duration. In particular, it investigates both theoretically and experimentally the tradeoffs and design parameters necessary for the design of efficient, highly directive picosecond pulse antennas. The work was divided into several areas of investigation. The first of these is the development of meaningful terminology upon which to evaluate wide instantaneous bandwidth responses. Concepts such as directive gain, effective aperture, radiation patterns, etc., are critically reviewed and modified where necessary. The second part of the program involves the development of measurement techniques for experimentally evaluating wideband antenna performance. It reports on experimental techniques which make use of time domain techniques to evaluate the antenna's transmitting and receiving transfer functions, driving point impedance, and efficiency in a single measurement. Finally, theoretical work on obtaining bounds on the performance that can be expected from antennas capable of radiating unmodulated pulses of picosecond duration is reported: In particular, it develops upper bounds on the antenna efficiency as a function of directivity and size, and examine the concept of optimizing gain-aperture product. (Author)

Descriptors :   (*ANTENNAS, ELECTROMAGNETIC PULSES), BROADBAND, MICROWAVE EQUIPMENT, RADAR ANTENNAS, HORN ANTENNAS, GAIN, ANTENNA RADIATION PATTERNS, PERFORMANCE(ENGINEERING).

Subject Categories : Electrical and Electronic Equipment
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE