Accession Number:

ADA151616

Title:

Defocusing Losses in a Log Periodic-Fed Reflector.

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA ELECTRONICS RESEARCH LAB

Personal Author(s):

• Dybdal,R. B.

Report Date:

1984-12-20

Pagination or Media Count:

22.0

Abstract:

Log periodic designs are a well established wideband antenna technology, but one in which the phase center travels along the structure as the frequency varies. When a log periodic antenna is used as a feed for a reflector antenna, the phase center location cannot be maintained at the reflector focus over the frequency range and defocusing results. The purpose of this analysis is to quantify the defocusing loss for a long periodic-fed reflector. The analysis presented compares favorably with measured results. Author keywords include Antenna losses Reflector antenna Wideband antenna.

Descriptors:

• *ANTENNAS
• *LOG PERIODIC ANTENNAS
• POSITION(LOCATION)
• FOCUSING
• LOSSES
• REFLECTORS
• BROADBAND ANTENNAS
• LOG PERIODIC STRUCTURE

Subject Categories:

• Electrical and Electronic Equipment
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE