Accession Number:

AD0756706

Title:

Driving-Point-Impedance Measurement and Balun Design for Spiral Antennas

Descriptive Note:

Final rept. on Task A

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s):

Report Date:

1972-03-01

Pagination or Media Count:

111.0

Abstract:

Measured impedance data are presented for two planar, equiangular, printed-circuit, two-arm, spiral antennas not mounted over cavities. Compact baluns with flat form factors were designed to match the average antenna impedance over the radiating frequency band found from these measurements, to an unbalanced 50-ohm impedance. The measured impedance and loss characteristics of the compact baluns, data showing the effect on antenna impedance of running a twin-lead transmission line close to the antenna, and impedance data for two complete balunantenna configurations in free space are also presented.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE