Accession Number:

AD0601586

Title:

RESEARCH STUDIES ON PROBLEMS RELATED TO ANTENNAS.

Descriptive Note:

Quarterly rept. no. 6, 1 Dec 63-29 Feb 64.

Corporate Author:

ILLINOIS UNIV URBANA ELECTRICAL ENGINEERING RESEARCH LAB

Personal Author(s):

Report Date:

1964-04-01

Pagination or Media Count:

51.0

Abstract:

An investigation was made into radiation patterns from periodic structures. Log-periodic cavity-backed slot antennas which produce vertically polarized radiation were studied, and further investigation on the construction of a feed system to eliminate the need for a ground screen was considered. Pattern measurements on both uniform and log-periodic zigzag antennas were calculated, and the characteristics of both present forms and new versions of the conical logarithmic spiral antenna were discussed. Studies were made of antennas for airborne direction finding, the feasibility of utilization varactor diodes in a backfire antenna, and wave propagation along helical conductors as well as of periodic structures of wideband applications and radiation from circular waveguides. Research was also done on the development of new types of log-periodic antennas, a high resolution millimeter antenna, and omnidirectional and steerable beam antennas which can be operated at millimeter wavelengths. A bibligraphy containing 104 entries is also included in the report.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE