Bandpass filter utilizing capacitively coupled stepped impedance

Details Bandpass filter utilizing capacitively coupled stepped impedance Bandpass filter utilizing capacitively coupled stepped impedance

1991-06-20

1992-09-01

Laroche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333219, H01P 1203

Patent

active

051442680

ABSTRACT:
A bandpass filter which lends itself to applications in the 500 megahertz to 1 gigahertz region. The filter utillizes the capacitively coupled bandpass filter as a model in the design process, but replaces the lumped element inductor/capacitor resonators with distributed stepped impedance resonators.

REFERENCES:
patent: 2201326 (1940-05-01), Trevor
patent: 2915716 (1959-12-01), Hattersley
patent: 3451015 (1969-06-01), Heath
patent: 4506241 (1985-03-01), Makimoto et al.
patent: 4733208 (1988-03-01), Ishikawa et al.
Matthaei et al., "Design of Microwave Filters . . . Coupling Structures", vol. 1, Aug. 5, 1963, pp. 423-430.
Sagawa et al., "A Design Method of Bandpass Filters Using Dielectric-Filled Coaxial Resonators", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-33, No. 2, Feb. 1985, pp. 152-157.
Chen Y. Ho et al.-"Half-Wavelength and Step Impedance Resonators Aid Microstrip Filter Design", Microwave System Design News, Oct., 1983; pp. 83-103.
M. Makimoto et al.-"Bandpass Filters Using Parallel Coupled Stripline Stepped Impedance Resonators", IEEE Trans. on Microwave Theory and Tecnhiques, vol. MTT-28, No. 12, Dec. 1980; pp. 1413-1417.
M. Makimoto et al.-"Compact Bandpass Filters Using Stepped Impedance Resonators", Proceedings of the IEEE, vol. 67, No. 1, Jan. 1979; pp. 16-19.
Watkins et al.-"Narrow Band Butterworth or Chebyshev Filter Design Using the TE-59 Calculator", R.F. Design, Nov./Dec. 1980; 7 pages.

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