Broadband hybrid monopole antenna
First Claim
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1. A broadband hybrid monopole antenna which comprises:
- a metal ground plane;
a metal inner conductor feed network passing through the ground plane and extending approximately 1/4 of the operating wavelength above the plane;
a metal outer conductor whose length is slightly less than 1/4 of the operating wavelength, concentric with the inner conductor and capacitively coupled to the ground plane; and
an rf input with one conductor electrically coupled to the input end of the inner conductor for feeding electromagnetic energy into the inner conductor and the second conductor electrically coupled to the ground plane, wherein electromagnetic energy is capacitively coupled to the outer conductor.
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Abstract
A new type of radiating structure with rugged high frequency design comprng essentially a single hybrid monopole which utilizes capacitive coupling from a open-ended transmission line to accomplish its broadband characteristics. The monopole is a metal conductor concentric with the transmission line and is separated from a ground plane by an adjustable gap that may be effectively used for fine tuning the antenna. By utilizing helical springs as the conductors this hybrid monopole antenna has self-erecting or pop-up design capability.
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Citations
12 Claims
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1. A broadband hybrid monopole antenna which comprises:
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a metal ground plane; a metal inner conductor feed network passing through the ground plane and extending approximately 1/4 of the operating wavelength above the plane; a metal outer conductor whose length is slightly less than 1/4 of the operating wavelength, concentric with the inner conductor and capacitively coupled to the ground plane; and an rf input with one conductor electrically coupled to the input end of the inner conductor for feeding electromagnetic energy into the inner conductor and the second conductor electrically coupled to the ground plane, wherein electromagnetic energy is capacitively coupled to the outer conductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification