Accession Number : AD0657669

Title :   ELECTROMAGNETIC INTERFERENCE MEASUREMENT METHODS-SHIELDED ENCLOSURE.

Descriptive Note : Quarterly rept. no. 3, 1 Dec 66-28 Feb 67,

Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s) : Free,W. R. ; Bonham,C. H. ; Gibson,R. E. ; Jenkins,B. M.

Report Date : AUG 1967

Pagination or Media Count : 46

Abstract : Investigation of techniques and procedures for making radiated measurements in shielded enclosures, which can be correlated with measurements made in the open-field, have continued. A microwave hooded antenna for use over the 1 to 12 GHz frequency range was evaluated after a modification to integrate a series injection calibration network into the antenna structure. The results of this evaluation indicate that the characteristics of the probe antenna are acceptable. An evaluation of a UHF hooded antenna for use over the 200 to 1500 MHz region was completed. The results of this evaluation indicate that the characteristics of the hooded probe antenna are acceptable. A series of antenna coupling measurements were performed in an 8 x 8 x 12 foot shielded enclosure over the frequency range from 1 to 100 MHz. The results from these measurements were compared with results obtained in an 8 x 8 x 20 foot enclosure to determine the effects of enclosure dimensions on measurements in this frequency range. A computer program for simulating reflection conditions in a shielded enclosure was completed during this period. The development of the computer program and a discussion of preliminary results obtained with the program are presented. (Author)

Descriptors :   (*ELECTROMAGNETIC SHIELDING, ANTENNAS), (*RADIOFREQUENCY INTERFERENCE, MEASUREMENT), CONICAL ANTENNAS, LOG PERIODIC ANTENNAS, HELICAL ANTENNAS, THEORY, ANTENNA RADIATION PATTERNS, ARMY EQUIPMENT, COMMUNICATION EQUIPMENT, MICROWAVE FREQUENCY, ULTRAHIGH FREQUENCY

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE