Radiation and scattering from ferrite-tuned cavitybacked slot antennas: Theory and experiment

Anastasis C. Polycarpou, Constantine Balanis, James Aberle, Craig Birtcher

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


A three-dimensional finite-element method hybridized with the spectral/spatial domain method of moments is presented for the analysis of ferrite-tuned cavity-backed slot antennas. The cavity, which is partially filled with magnetized ferrite layers, is flush mounted on an infinite ground plane with possible dielectric or magnetic overlay. The antenna operates primarily in the ultrahigh-frequency band. The finite-element method is used to solve for the electric-field distribution inside the cavity, whereas the spectral-domain approach is used to solve for the exterior region. An asymptotic extraction of the exponential behavior of the Green's function followed by a spatial evaluation of the resulting integral is used to improve computational speed. Radar cross section, input impedance, return loss, gain, and efficiency of ferrite-tuned cavity-backed slots (CBS) are calculated for various biasing conditions. Numerical results are compared with experimental data.

Original languageEnglish (US)
Pages (from-to)1297-1306
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Issue number9
StatePublished - 1998


  • Ferrites
  • Hybrid methods
  • Slot antennas

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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