Accession Number : ADB039121

Title :   Conical Phased Array Antenna Investigations.

Descriptive Note : Final rept.,

Corporate Author : HUGHES AIRCRAFT CO CULVER CITY CA RADAR MICROWAVE LAB

Personal Author(s) : Villeneuve, A. T.

Report Date : APR 1979

Pagination or Media Count : 107

Abstract : For missile seeker radars, the use of mechanically scanned antenna systems becomes increasingly difficult as the requirements for the aerodynamic and electrical performance of missiles become more demanding. One possible alternative to the use of mechanically scanned antennas lies in the application of flush-mounted slot antenna systems on metallic cones or ogival surfaces. These antenna systems would be inertialessly scanned in the required directions. The curvature of the particular conformal surfaces and the positional relationships of the radiating elements, however, introduce many problems which are different than those associated with planar electronically controlled arrays. As a consequence of these positional relationships, there may be no element that can be considered 'typical' so that impedances, patterns, and polarizations may vary significantly among the elements, in contrast to the conditions that are obtained in planar arrays for elements not too near the edge. In addition, since the radiating elements are not all similarly oriented, there may be a significant cross polarized component in the array pattern that could interfere with the desired system operation.

Descriptors :   *SLOT ANTENNAS, *ANTENNA ARRAYS, *CONFORMAL STRUCTURES, *GUIDED MISSILE ANTENNAS, CONICAL ANTENNAS, PHASED ARRAYS, RADAR HOMING, NOSE CONES, RADAR ANTENNAS, ELECTRICAL IMPEDANCE, ANTENNA RADIATION PATTERNS, COMPUTER PROGRAMS, S BAND, POLARIZATION, FORTRAN.

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE