Annular ring antenna

Details Annular ring antenna Annular ring antenna

2006-01-31

2006-01-31

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S732000, C343S867000

Reexamination Certificate

active

06992630

ABSTRACT:
The antenna includes a substrate, such as a dielectric material, and an electrically conductive circular ring on the substrate and having an outer diameter and an inner diameter concentrically arranged. The outer diameter is less than 1/10 an operating wavelength, and preferably about 1/20th, so that the antenna is electrically small relative to the wavelength. The inner diameter is in a range of π/6 to π/2 times the outer diameter, and preferably is π/4 times the outer diameter to enhance the gain relative to its area.

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Kokotoff et al.; Royal Melbourne Institute of Technology, “Analysis and Design of Probe-fed Printed Annular Rings”, Aug. 28, 2003; pp. 1-5.
Amari et al.; University of Victoria, Canada; “A Technique for Designing Ring and Rod Dielectric Resonators in Cutoff Waveguides”, Microwave and Optical Technology Letters, vol. 23, No. 4, Nov. 20, 1999; pp. 203-205.

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