Accession Number:

AD0773173

Title:

Method of Moments Applications. Volume IV. Feedline Interference with Dipole Performance Theory and Experiment.

Descriptive Note:

Phase rept. Jun 72-Feb 73

Corporate Author:

SYRACUSE UNIV N Y DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s):

• Mendelovicz,E.
• Adams,A. T.
• Siarkiewicz,Kenneth
• Mendelovicz,A.

Report Date:

1973-10-01

Pagination or Media Count:

51.0

Abstract:

Electric fields, MatricesMathematicsMethod of momentsThe characteristics of thin-wire, finite-gap, half wave length and quarter wavelength dipoles fed with a length of two-wire transmission line were studied using matrix methods. Transmission line length and gap size were varied obtaining the complete solution current distributions, impedance and far field beam patterns in each case. Significant departures from the ideal dipole characteristics are found even for electrically small gap sizes and transmission line lengths. When the departures are small, they can be described adequately by the relative magnitude of cross polarized field components and by null fill-in. Cross polarization effects are minimized by choosing transmission line length equal to wavelength where n is an integer. Departures from ideal dipole performance are significantly increased by reducing dipole length and by current imbalance. Some of the effects noted have been verified experimentally. Author

Descriptors:

• *Dipole antennas
• Cross polarization
• Far field
• Transmission lines
• Electrical impedance
• Electric fields
• Matrices(Mathematics)

Subject Categories:

• Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE