Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1994-12-07
1996-01-23
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333246, H01P 518
Patent
active
054867983
ABSTRACT:
A microwave directional coupler comprises a dielectric coupler board, elongate metallic strip conductors deposited on front and back surfaces of the board and having respective central portions electrically broadside coupled with each other through the board, and respective right and left hand lead portions terminating in ports at the bottom of the board. Metallic ground plane regions cooperate with those strip conductors to form corresponding microwave transmission lines comprising respective signal conductors provided by said strip conductors and respective grounded conductors provided by said regions. The ground plane regions are in the form of expanses of metallic layers deposited on the same surfaces of the board as are such strip conductors. Ground plane regions on opposite sides of the board are electrically connected by plated-through holes passing through the board. The coupler board is vertical and stands on a dielectric connector board having metallic strips thereon for connecting the strip conductors to external circuit elements.
REFERENCES:
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patent: 4823097 (1989-04-01), Konishi et al.
patent: 4882555 (1989-11-01), Wong
patent: 4967171 (1990-10-01), Ban et al.
patent: 5032803 (1991-07-01), Koch
"Characteristic Impedances of Broadside-Coupled Strip Transmission Lines", Seymour B. Cohn, IRE Transactions On Microwave Theory And Techniques, Nov. 1960, pp. 633-637.
"A Directional Coupler Of A Vertically Installed Planar Circuit Structure", Konishi, et al, IEEE Transactions On Microwave Theory And Techniques, vol. 36, No. 6, Jun. 1988, pp. 1057-1063.
"New Types Of 3-dB Directional Couplers Of Microstrip Transmission Lines", Dongtien, 1986 IEEE MTT-S Digest, #J-16, pp. 265, 266.
AT&T IPM Corp.
Gensler Paul
Kip, Jr. Ruloff F.
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