Wave transmission lines and networks – Coupling networks – Balanced to unbalanced circuits
Reexamination Certificate
2007-06-19
2007-06-19
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Coupling networks
Balanced to unbalanced circuits
C333S248000
Reexamination Certificate
active
10534460
ABSTRACT:
The present invention provides a line transition and a method for manufacturing the same. The line transition is constructed such that a planar circuit can be arranged in the direction parallel to the propagation direction of electromagnetic waves propagating through a solid waveguide, the coupling characteristics of the solid waveguide with the planar circuit formed on a dielectric substrate are not influenced by the assembly precision of the waveguide and the circuit, and the line transition characteristics are not affected by a variation in manufacturing the dielectric substrate. Notches are formed at the edges of the dielectric substrate in the vicinities of coupled-line pattern segments formed on a dielectric substrate. The notches are formed by punching through holes in a ceramic green sheet serving as a motherboard, firing the motherboard, and cutting the motherboard using dicing lines passing through the through holes.
REFERENCES:
patent: 5920245 (1999-07-01), Ishikawa et al.
patent: 60-192401 (1985-09-01), None
patent: 2004-147291 (2004-05-01), None
The PCT/ISA/210 (with English Language Translation, PCT/ISA/220, & PCT/ISA/237 Forms issued for the Parent PCT Application.
Kato Takatoshi
Saitoh Atsushi
Dickstein & Shapiro LLP
Lee Benny
Murata Manufacturing Co. Ltd.
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