Modified cavity model to determine resonant frequency of tunable microstrip ring antenna

Gurel Ç. S. , Yazgan E.

ELECTROMAGNETICS, cilt.19, sa.5, ss.443-455, 1999 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 19 Konu: 5
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1080/02726349908908662
  • Sayfa Sayıları: ss.443-455


In order to compute the resonant frequency of an air-gap tuned annular-ring microstrip antenna without the accuracy being affected from the air gap width, the cavity model is modified by using a new dynamic permittivity and inner/outer radii extension expressions. A close agreement is obtained between the theoretical and the experimental resonant frequency results for fundamental and higher order modes and for different gap widths.