Wide band quadrature hybrid

Details Wide band quadrature hybrid Wide band quadrature hybrid

1986-02-28

1987-06-16

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

330149, 329133, 332 16R, 332 45, 455323, H01P 518

Patent

active

046738983

ABSTRACT:
A system for providing a quadrature hybrid with a wide bandwidth and an extremely low amplitude imbalance. This system incorporates conventional quadrature hybrids as components and provide a system quadrature hybrid having a larger bandwidth and a far lower amplitude imbalance than that of any of the component quadrature hybrids. Typically, the system bandwidth improvement over that of the component hybrids is 60 percent, while the improvement in the imbalance is 6 to 1. These improvements are achieved using a system network consisting fundamentally of three conventional hybrids, a reversing divider and an in-phase divider, all of which are readily available components. This system provides a significant improvement over more complicated quadrature hybrid designs where filter networks are required to obtain wide bandwidth. The widest bandwidth components now abailable, including those using filter networks, can be incorporated in the present invention to provide an even wider system bandwidth.

REFERENCES:
patent: 3444475 (1969-05-01), Seidel
patent: 4485360 (1984-11-01), Seward
Marcatili et al, Broad-Band Directional Couplers, IRE Trans. on MTT, Jul. 1962, pp. 251-257.

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