Accession Number:

ADA026712

Title:

The Basic Theory of Phased Arrays with A Discussion of the Blind Angle

Descriptive Note:

Technical Report

Corporate Author:

AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States

Personal Author(s):

• Becker,Lawrence D.

Report Date:

1976-05-01

Pagination or Media Count:

84.0

Abstract:

This report reviews the underlying theory of the phased array and then examines one of its most limiting problems--the blind angle. The theory of the phased array is developed by studying a simple two element array and then progressing to multi-element arrays. Following this, the progressive phase shift is incorporated into the driving currents and its result examined. The blind angle phenomenon is presented and then a physical reason for its occurrence is sought. The mutual coupling concept is demonstrated by examining mutual impedance as a function of spacing. Then the two predominate theories, surface wave and modal, offering a physical insight into the phenomenon are examined. Considerable attention is devoted to the Ghost Mode Hypothesis of Oliner, et al. and the work of Louis Stark.

Descriptors:

• RADAR ANTENNAS
• PHASED ARRAYS
• COUPLING(INTERACTION)
• SURFACE WAVES
• THEORY
• THESES
• ATTENUATION
• ANTENNA RADIATION PATTERNS
• DIPOLE ANTENNAS
• RADAR SCANNING

Subject Categories:

• Active and Passive Radar Detection and Equipment
• Radiofrequency Wave Propagation
• Active and Passive Radar Detection and Equipment
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE