Multifrequency Unipole Antenna Designs Using the Numerical Electromagnetics Code
Abstract
The folded unipole antenna has recently appeared as a commercially available alternative to conventional insulated-base monopoles in standard broadcast applications. A folded unipole antenna has significant advantages over both series fed vertical and top-loaded antennas. This thesis investigates using a computer numerical model to obtain the input impedance of a 72 meter folded unipole antenna, with three fold wires. The design of a multi-frequency folded unipole antenna is demonstrated for 1.380 and 1.530 Mhz. Also presented are designs for 60 deg., 90 deg., 135 deg., 180 deg., 225 deg. folded unipole antennas for a frequency of 1 Mhz, with an input resistance of 50 ohms. Finally, designs are shown for 90 deg. monopole and 90 deg. unipole antennas at 1 Mhz.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1986
- Accession Number
- ADA177904
Entities
People
- Nicolaos Paleologos
Organizations
- Naval Postgraduate School