Directional coupler for the high-frequency range

Details Directional coupler for the high-frequency range Directional coupler for the high-frequency range

1997-02-18

1998-10-20

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333246, H01P 518

Patent

active

058252606

ABSTRACT:
A directional coupler that can be produced entirely in integrated technology (MIC or MMIC), particularly for the X-band. The directional coupler can be designed for a high coupling attenuation (>30 dB) and a high directivity (>30 dB) with a large relative bandwidth (approximately 20%). This is achieved with a stepped arrangement comprising a plurality of .lambda./4 waveguide sections and coupling capacitors disposed between the respective paths of the coupler.

REFERENCES:
patent: 3012210 (1961-12-01), Nigg
patent: 3593208 (1971-07-01), Smith
patent: 4011528 (1977-03-01), Podell et al.
patent: 4799032 (1989-01-01), Sugarawa
patent: 4999593 (1991-03-01), Anderson
patent: 5166690 (1992-11-01), Carlson et al.
S.L. March: "Phase Velocity Compensation In Parallel-Coupled Microstrip" 1982 IEEE MTT-S International Microwave Symposium-Digest, 15-17, Jun. 1982, Dallas (US), pp.410-412, XP002060929.
S. Toyoda: "Variable coupling Directional Couplers Using Varactor Diodes", 1982 IEEE MTT-S International Microwave Symposium-Digest, 15-17, Jun. 1982, Dallas (US), pp. 419-421, XP002061019.

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