Accession Number : AD0464374


Title :   A PHASE-LOCKED RECEIVING ARRAY FOR HIGH-FREQUENCY COMMUNICATIONS USE


Descriptive Note : Master's thesis


Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS ANTENNA LAB


Personal Author(s) : Svoboda, Dean E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/464374.pdf


Report Date : 15 Aug 1963


Pagination or Media Count : 70


Abstract : An H.F. receiving array using I.F. combination and automatic phasing through phase-locked loops is discussed. The effects of an interfering signal on automatic phasing and on the over-all array performance are considered. An experimental array is described and results of measurement on the array are given. The array uses separate R.F. amplifiers for each element. The signals from each element are combined at an intermediate frequency. It was shown that this type of array corrects for essentially all phase errors between the distant transmitter and the point where the received signals are combined. This includes errors due to the propagation path, array element motion, near field obstructions, and instabilities in electronic equipment and R.F. cables. The array also corrects for phase shifts due to changes in angle of arrival, thus giving it the highly desirable property of automatically tracking a desired signal.


Descriptors :   *PHASED ARRAYS , PROPAGATION , HIGH FREQUENCY , FEASIBILITY STUDIES , ERRORS , RADIO RECEPTION , RADIO INTERFERENCE , PHASE SHIFT CIRCUITS , RADIOFREQUENCY CABLES , PHASE CONTROL , OSCILLATORS , AUTOMATIC


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE