Accession Number:

ADA055197

Title:

Analysis of Monopole Antenna Arrays on Cylinders by the Geometrical Theory of Diffraction.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s):

• Thieman,Bruce A.

Report Date:

1977-12-01

Pagination or Media Count:

77.0

Abstract:

Using the Geometrical Theory of Diffraction GTD the fields due to a monopole array mounted on an aircraft near the top or bottom were analyzed. The aircraft was modeled in its most basic form an infinitely long elliptical cylinder. The aircraft cross-section at the location of the antenna was modeled as a 2 meter by 4 meter ellipse. The frequency band of operation was 250 mHz to 400 mHz with an average wavelength assumed of 1 meter. The three element array was found to have a beam broadening effect when compared to the array mounted on an infinite ground plane. The array exhibited a poor potential to form a single major lobe in its antenna pattern but had a high mobility of pattern nulls. Author

Descriptors:

• *ANTENNA ARRAYS
• *MONOPOLE ANTENNAS
• *AIRCRAFT ANTENNAS
• MODELS
• THESES
• ANTENNA RADIATION PATTERNS
• VERY HIGH FREQUENCY

Subject Categories:

• Aircraft
• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE