Analysis of the microstrip disk antenna element
- 1 September 1979
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 27 (5) , 660-664
- https://doi.org/10.1109/tap.1979.1142159
Abstract
The circular microstrip antenna element is formed by a radiating disk closely spaced above a ground plane. It is modeled as a cylindrical cavity with magnetic walls which can be resonant in the transverse magnetic (TM) modes. The far fields and the radiation conductances for different mode structures have been calculated assuming a magnetic line current flowing along the perimeter of the disk. The directivity of a disk antenna excited in the dominant mode is between 4.8 dB and 9.9 dB, depending on the size. Losses, due to imperfect supporting dielectrics and to the finite conductivity of the conductors, have been derived by means of a perturbation technique. Graphs are given for design purposes showing the input impedance, theQfactor, and the radiation efficiency at resonance for different modes and thicknesses. The air-filled microstrip antenna has the highest efficiency and the broadest bandwidth at a given resonant frequency.Keywords
This publication has 9 references indexed in Scilit:
- A low sidelobe microstrip arrayPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- An analysis technique for microstrip antennasPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Microstrip antenna far-field radiation pattern analysis using the unimoment-monte carlo methodPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- The circular disc, printed circuit antennaPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Theory of the circular-disc printed-circuit antennaProceedings of the Institution of Electrical Engineers, 1978
- Resonant frequency of a circular disc, printed-circuit antennaIEEE Transactions on Antennas and Propagation, 1977
- Microstrip antennasIEEE Transactions on Antennas and Propagation, 1975
- Circular resonant structures in microstripElectronics Letters, 1969
- Radiation fields of circular loop antennas by a direct integration processIEEE Transactions on Antennas and Propagation, 1960