Wave transmission lines and networks – Coupling networks – Balanced to unbalanced circuits
Reexamination Certificate
2006-09-06
2009-06-30
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Coupling networks
Balanced to unbalanced circuits
C333S033000
Reexamination Certificate
active
07554418
ABSTRACT:
A waveguide/strip line converter includes a waveguide and a multilayer substrate. A second end of the multilayer substrate is fixed to an opening of the waveguide. The multilayer substrate includes a plurality of dielectric layers to form a plurality of substrate faces. A top substrate face includes a strip line and a first short-circuiting metal pattern. First and second intermediate substrate faces include second and third short-circuiting metal patterns with openings, respectively. A matching element forming substrate face includes a matching element, which is electromagnetically coupled with the strip line. A waveguide passage extends through the openings between the strip line and the matching element. A cross sectional area of the opening is larger than that of the opening.
REFERENCES:
patent: 6060959 (2000-05-01), Yakuwa
patent: 6580335 (2003-06-01), Iizuka et al.
patent: 6816028 (2004-11-01), Kato
patent: 6870438 (2005-03-01), Shino et al.
patent: 6958662 (2005-10-01), Salmela et al.
Office Action dated Mar. 13, 2008 in German Application No. 10 2006 041 994.4 with English translation thereof.
Denso Corporation
Harness Dickey & Pierce PLC
Lee Benny
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