Accession Number:

AD0601733

Title:

ANALYSIS OF THE SPIRAL ANTENNA DIRECTION FINDER

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS ADELPHI MD

Personal Author(s):

• Johnson, Peter B.

Report Date:

1964-04-20

Pagination or Media Count:

38.0

Abstract:

A study was made of a method previously suggested for constructing a passive direction finder capable of determining the azimuth and elevation of an electromagnetic wavefront. This direction finder consists of a two-wire, Archimedian, spiral antenna and a phase comparator. Angular information of accuracy too low for the intended application is obtained when the theory and experimental data previously presented are used. A general theory for the direction finder is established and methods for accuracy improvement are suggested.

Descriptors:

• *ANTENNA RADIATION PATTERNS
• AZIMUTH
• DIRECTION FINDING
• ELECTROMAGNETIC RADIATION
• ERRORS
• EXPERIMENTAL DATA
• MATHEMATICAL ANALYSIS
• PHASE MEASUREMENT
• SPIRAL ANTENNAS

Subject Categories:

• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE