论文信息 - Analysis of Wide-Band Microstrip Circulators by Point-Matching Technique

Analysis of Wide-Band Microstrip Circulators by Point-Matching Technique

An exact field theory treatment of microstrip Y-junction circulators for wideband operation is presented. Field expressions are written in each region of the junction in form of infinite summation of the corresponding region modes. Matching of the fields at the common boundaries, taking fringing fields in microstrip structures into account, leads to a set of infinite non-homogeneous equations in these mode-amplitudes. A wideband microstrip circulator, designed using the point-matching technique, is observed. The 20-dB isolation bandwidth is about 62% without using any external tuning elements.

A.M. Khilla

[1] I. Wolff,et al. The Point-Matching Solution for Magnetically Tunable Cylindrical Cavities and Ferrite Planar Resonators , 1979 .

[2] F. Rosenbaum,et al. Wide-Band Operation of Microstrip Circulators , 1974 .

[3] M. V. Schneider,et al. Microstrip lines for microwave integrated circuits , 1969 .

[4] H. A. Wheeler. Transmission-Line Properties of Parallel Wide Strips by a Conformal-Mapping Approximation , 1964 .

[5] E. Hammerstad,et al. Accurate Models for Microstrip Computer-Aided Design , 1980, 1980 IEEE MTT-S International Microwave symposium Digest.

[6] Gunter Kompa,et al. Calculation method for microstrip discontinuities and T junctions , 1972 .

[7] Gunter Kompa,et al. Planar waveguide model for calculating microstrip components , 1975 .

[8] Y. Ayasli,et al. Analysis of Wide-Band Stripline Circulators by Integral Equation Technique , 1980 .

[9] H. Bosma. On Stripline Y-Circulation at UHF , 1964 .

[10] I. Wolff,et al. Field Theory Treatment of H--Plane Waveguide Junction with Triangular Ferrite Post , 1978 .

[11] T. Itoh,et al. A New Method for Calculating the Capacitance of a Circular Disk for Microwave Integrated Circuits (Short Papers) , 1973 .

[12] M. Hines. Reciprocal and Nonreciprocal Modes of Propagation in Ferrite Stripline and Microstrip Devices , 1971 .

[13] F. J. Rosenbaum,et al. Wideband Operation of Microstrip Circulators , 1973 .