Accession Number:

AD0251938

Title:

AN ELECTRONIC SELF-FOCUSING TRACKING ANTENNA SYSTEM

Descriptive Note:

Corporate Author:

SPACE-GENERAL CORP EL MONTE CA

Personal Author(s):

Report Date:

1960-11-30

Pagination or Media Count:

1.0

Abstract:

An automatic, electronic, self-focusing antenna array, is described. This system consists of a number of elemental antennas whose signal phase differences are adaptively adjusted by the use of phase-lock loops. The signals on each elemental antenna are thus added coherently irrespective of the direction of arrival of the incoming wave or irrespective of phase perturbations at the elemental antennas. The noise in each of the elemental circuits is added incoherently. The intent of this program is the development of an adaptive antenna system. A theoretical analysis was made and tests were performed with eight simulated elemental antennas. The operation of the system appears to be essentially independent of the number of elemental antennas. It was demonstrated that the system acquires the signal in the shortest possible time for any signal and noise conditions. It should be noted that the acquisition time of a conventional directive antenna system is fixed for all signal levels greater than the minimum detectable signal for which the system was designed. A conventional antenna system will not acquire signals below the design level. The phase-lock system, being adaptive, has short acquisition times for large signals and will acquire weak signals which the conventional search system will miss. Auad-251 938N3AD-251 939Div. 29, 32U 10 Mar 61 Behavioral Sciences Lab., Aerospace Medical Div., Wright-Patterson Air Force Base, Ohio. A HEAD CIRCUMFERENCE SIZING SYSTEM FOR HELMET DESIGN. INCLUDING THREE-DIMENSIONAL PRESENTATIONS OF ANTHROPOMETRIC DATA, by Robert S. Zeigen, Milton Alexander, and Edmund Churchill. Rept. on Biophysics of Flight. Dec 60, 97p. incl. illus. tables, 23 refs. hor

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE