Accession Number : AD0717583

Title :   Visual Detection of Microwave Field Patterns Using Liquid Crystals.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Torkan,Hosseih

Report Date : SEP 1970

Pagination or Media Count : 64

Abstract : Although point by point electric field mapping has been known for many years using point detectors, the method is laborious, time consuming, and produces errors due to the probe disturbances of the actual field and some information may be lost by discrete scanning of the field. The paper represents the results of a theoretical and experimental investigation to use a liquid crystal area detector of the microwave field, where continuous color displays the field intensities of an open-ended waveguide, a parabolic antenna focus and the interference pattern of the field between a source and a reflector. Experimental confirmation of certain phases of the microwave field theory is included. (Author)

Descriptors :   (*MICROWAVES, DETECTION), (*PROBES(ELECTROMAGNETIC), DESIGN), ELECTRIC FIELDS, FEASIBILITY STUDIES, POWER SPECTRA, CIRCUITS, ANTENNA RADIATION PATTERNS, RADIOFREQUENCY INTERFERENCE, TEST METHODS, TEST EQUIPMENT, CALIBRATION, THESES

Subject Categories : Test Facilities, Equipment and Methods
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE