Wave transmission lines and networks – Long line elements and components – Strip type
Reexamination Certificate
2007-07-03
2007-07-03
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Long line elements and components
Strip type
C333S02400C, C257SE23114
Reexamination Certificate
active
10931115
ABSTRACT:
A high frequency circuit module for use in an automotive radar or the like, in which RF circuit parts are mounted on both sides of a hard multilayer dielectric substrate, and a transmission line connecting the RF circuit parts provided on both sides is constructed by a via group including a periodical structure or a via having a coaxial structure perpendicular to faces of the multilayer dielectric substrate. As the multilayer dielectric substrate, a hard multilayer substrate using metallic layers as a microstrip line wiring layer, a DC/IF signal line layer, and grounding metal layers for shielding which are disposed on and under the DC/IF signal line is employed. By using the transmission line achieved by a through via having the periodical structure or the through via having the coaxial structure, an electromagnetic wave propagating in parallel between the grounding conductors is confined.
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European Search Report dated Dec. 8, 2003.
Partial English translation of Japanese Application No. 2001-185918 listed above.
Kondoh Hiroshi
Nagaishi Hideyuki
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Glenn Kimberly E
Hitachi , Ltd.
Lee Benny
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