Accession Number : AD0728639

Title :   Low Volume High Power Radiating Transmitter.

Descriptive Note : Final technical rept.,

Corporate Author : GENERAL ELECTRIC CO SYRACUSE N Y HEAVY MILITARY ELECTRONIC SYSTEMS

Personal Author(s) : Stuart,Gordon F. ; Farrell,George F. , Jr

Report Date : JUL 1971

Pagination or Media Count : 52

Abstract : Conventional antenna arrays utilize element spacings of approximately one-half wavelength and are configured to minimize mutual coupling effects. The radiating impedance of conventional array elements is predominately the self-impedance of the element. In this program a distributed transmitter feeding a dense array of elements was developed and demonstrated at UHF. The transmitter consists of a total of two hundred fifty-six radiating elements within a one-square wavelength area. Each element is driven by a one-watt amplifier. In the densely packed array mutual coupling effects are used to advantage. The self-impedance of an isolated small element is impractical to drive. In the array environment the radiation resistance is increased through mutual effects to a magnitude suitable for efficient excitation from conventional solid-state amplifiers. This program demonstrated the feasibility of achieving (1) reasonable radiation impedance with small closely-spaced elements, and (2) efficient and coherent power addition in space of energy radiated from a large number of densely-spaced elements. (Author)

Descriptors :   (*PHASED ARRAYS, *RADAR TRANSMITTERS), POWER DIVIDERS, TRANSISTOR AMPLIFIERS, RADIOFREQUENCY POWER

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE