Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1994-02-24
1996-03-12
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333116, H01P 518
Patent
active
054990017
ABSTRACT:
A microwave coupler is disclosed which includes an aluminum housing forming a cavity with upper and lower ground planes. A pair of substantially square-shaped conductors are supported within the cavity and symmetrically located with respect to the upper and lower ground planes. Each conductor has overlapping central portions and second and third portions extending in opposite directions at a 90 degree angle from the central portion to form a substantially H shaped configuration. A fourth portion extends at a 90 degree angle from the third portion of each conductor. The central portions of each conductor are 1/4 wavelength and extend in parallel planes, separated by an air dielectric. The terminating portions of each conductor are provided with contacts providing input/output ports (A,B,C,D). The contacts are maintained in position by supports attached to the walls of the cavity at the central portions as well at the terminating portions. To compensate for the inductance introduced by the conductor bends, the cavity is machined in the vicinity of the 90 degree bends to create an increase in capacitance to compensate for the inductance and thereby achieve a substantially 3 db split between the input and output ports. A 4-way, 6 db coupler is also disclosed.
REFERENCES:
patent: 4139827 (1979-02-01), Russell
patent: 4459568 (1984-07-01), Landt
patent: 4543548 (1985-09-01), Seal et al.
patent: 4797643 (1989-01-01), Wong et al.
patent: 5075646 (1991-12-01), Morse
Ahulii Robert
Degun Joginder S.
Denson-Low Wanda K.
Gensler Paul
Price Phyllis Y.
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