Wave transmission lines and networks – Coupling networks – Balanced to unbalanced circuits
Patent
1989-09-20
1990-11-27
Gensler, Paul
Wave transmission lines and networks
Coupling networks
Balanced to unbalanced circuits
333 34, H01P 5107
Patent
active
049739255
ABSTRACT:
A method and apparatus for coupling a double-ridge wavguide to a microstrip circuit. A lower ridge of a coupling section of waveguide is expanded by gradually increasing its width such that at the beginning of the coupling the lower ridge is equal to the width of the lower ridge of the double-ridge waveguide to be coupled and at the end of the coupling the width of the lower ridge is equal to the full width of the coupling. This flaring of the lower ridge creates an electrically conductive surface for receiving a ground plane for the microstrip circuit. Additionally, the upper ridge is altered gradually such that at the beginning of the coupling the ridge gap is equal to the gap in the double-ridge waveguide and at the end of the coupling the ridge gap is equal to the sum of the thicknesses of the dielectric substrate, the microstrip line, and the ground plane of the microstrip circuit. The upper ridge is gradually tapered over the length of the coupling and then sharply tapered adjacent the microstrip end of the coupling so that the width of the upper ridge is changed to the width of the microstrip line and the impedance of the coupling matches the impedance of the microstrip circuit. The sidewalls of the coupling may also be tapered inwardly or outwardly if needed for impedance matching.
REFERENCES:
patent: 2825876 (1958-03-01), Le Vine et al.
patent: 3188583 (1965-06-01), Boyd
patent: 3969691 (1976-07-01), Saul
patent: 4144506 (1979-03-01), McCammon et al.
patent: 4453142 (1984-06-01), Murphy
patent: 4550296 (1985-10-01), Ehrlinger et al.
patent: 4562416 (1985-12-01), Sedivec
patent: 4571593 (1986-02-01), Martinson
patent: 4673897 (1987-06-01), Chua et al.
patent: 4679249 (1987-07-01), Tanaka et al.
patent: 4716386 (1987-12-01), Lait
Jamal S. Izadian, "Unified Design Plans and Waveguide Transitions," Microwaves & RF, May, 1987.
James P. Montgomery, "On the Complete Eigenvalue Solution of Ridged Waveguide," Transitions on Microwave Theory and Techniques, vol. MTT-19, No. 6, Jun., 1971.
K. L. Walton & U. C. Sundberg, "Broadband Ridged Horn Design," Microwave J., vol. 7, pp. 96-101, Mar. 1964.
J. R. Pyle, "The Cutoff Wavelength of the TE.sub.10 Mode in Ridged Rectangular Waveguide of Any Aspect Ratios," IEEE Transactions on Microwave Theory & Techniques, vol. MTT-14, No. 4, Apr., 1966.
Nusair Marwan E.
Scholl Stephen R.
Valentine Michael D.
Gensler Paul
Valentine Research, Inc.
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