Investigation of spiral performance over tightly spaced ground planes

The performance of a spiral antenna was measured and predicted using both the Numerical Electromagnetic Code (NEC) and the patch code for various tight spacings above a conductive ground plane. Spacings investigated were for physically realizable installations varying from 0.032 inch to 0.5 inch. Mo...

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Bibliographic Details
Main Authors: Holzheimer, T.R., Holloway, J.C.
Format: Conference Proceeding
Language:English
Subjects:
Antenna measurements
Arm
Degradation
Electromagnetic measurements
Frequency
Gain measurement
National electric code
Predictive models
Shape
Spirals
Online Access:Request full text
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Summary:The performance of a spiral antenna was measured and predicted using both the Numerical Electromagnetic Code (NEC) and the patch code for various tight spacings above a conductive ground plane. Spacings investigated were for physically realizable installations varying from 0.032 inch to 0.5 inch. Model limitations are addressed for comparison of measured to predicted data. Performance described includes antenna pattern shape, gain, and axial ratio. An assessment of what is considered good performance in the presence of tightly spaced ground planes is made.< >
DOI:10.1109/APS.1993.385309