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Computation of resonant frequency of annular‐ring‐loaded circular patch using cavity model analysis
Author(s) -
Chakravarty Tapas,
Biswas Sushamay,
Majumdar Arijit,
De Asok
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21426
Subject(s) - microwave , ring (chemistry) , solver , transcendental equation , computation , admittance , boundary value problem , physics , modal , discontinuity (linguistics) , method of moments (probability theory) , modal analysis , microstrip , electronic engineering , engineering , mathematical analysis , acoustics , mathematics , optics , electrical engineering , electrical impedance , materials science , numerical analysis , algorithm , telecommunications , estimator , chemistry , mathematical optimization , vibration , statistics , organic chemistry , polymer chemistry
In this paper, the annular‐ring‐loaded (ARL) circular patch is revisited. By applying suitable boundary conditions at the interfaces, the problem is solved. The structure is considered as a disk with a ring slot etched in‐between. The narrow slot divides the entire region into two parts. The slot is modeled as a π‐type admittance network. Using circuit theory, the modal‐current discontinuity is deduced and a transcendental relation giving the resonant frequency for n th mode is obtained. It is shown that the dominant‐mode resonant frequency depends on where the probe is located inside the circle or the annular ring. The theoretical predictions are compared with the results obtained using IE3D, a commercial method of moments (MoM)‐based solver. Comparison is also made with the published results as well as the experimental results and agreement of better than 2% to 3% is obtained. The analytical tool presented is simple in approach and computationally fast. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 622–626, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21426