Anti-skywave AM broadcast antenna design

Download
Author
Hussain, Sarfraz.
Date
1987Advisor
Adler, Richard W.
Second Reader
Atwater, Harry
Metadata
Show full item recordAbstract
This thesis investigates the design of an anti-skywave (ASW) AM broadcast
antenna. The parameters of a typical AM broadcast antenna are presented first. Then
the design proposed by Richard L. Biby is studied by numerical modeling with the
Numerical Electromagnetic Code (NEC). Biby's proposed design involves a ring of
short radiators with a conventional monopole operating over finite ground. To analyze
the behaviour of Biby's proposed ASW antenna, a generic radiator study is conducted
to test the ability of different sized radiators to launch the sky wave and the ground
wave first as isolated elements and then as closely coupled radiators with cancelling
phasing. Finally, some potential candidate structures are proposed for AM broadcast
transmission which might achieve the desired characteristics of ground wave
enhancement and sky wave suppression.
Rights
Copyright is reserved by the copyright owner.Collections
Related items
Showing items related by title, author, creator and subject.
-
A computer analysis of a conical monopole for use at naval high frequency direction finding receiving sites
Lemos, Panayiotis Petros (Monterey, California. Naval Postgraduate School, 1992-12);The Naval Security Group (NSG) High Frequency Direction Finding (HFDF) sites use large circularly disposed antenna arrays (CDAA) with moderate to high gain beams. Omnidirectional coverage is presently obtained by combing ... -
The design and analysis of a phased array microstrip antenna for a low earth orbit communication satellite
Barfield, William Lee (Monterey, California. Naval Postgraduate School, 1994-06);A Naval Postgraduate School spacecraft design class proposed a multiple beam, phased array, microstrip antenna as part of the preliminary design of a low earth orbit communication satellite. The antenna must provide coverage ... -
The design and evaluation of transmit and receive antennas for an ionospheric communications probe system: A. Multiband Dipole Antenna
Perros, Sotirios Georgios (Monterey, California. Naval Postgraduate School, 1992-12);This thesis reports the design, performance evaluation and construction of a transmitting antenna for an HF communications probe system. A short range ionospheric communication link between Monterey, CA, (transmit site) ...