Dual-Substrate Capacitive Loading for Size Reduction in Shorted Annular Ring Antennas
- 7 August 2009
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 57 (10), 3339-3342
- https://doi.org/10.1109/tap.2009.2029391
Abstract
This communication presents a capacitive loading technique capable of providing significant size reduction in shorted annular ring antennas. Capacitive loading techniques are utilized in many antenna geometries to reduce the size of the radiator. Many such structures generate capacitance between parallel conducting planes. The new loading structure utilizes two separate microwave substrates. One substrate is contained beneath the radiator, and a high dielectric substrate is present between the parallel conductors to increase the capacitive effect. The new loading technique is verified with simulations and measurements with excellent agreement between the two.Keywords
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