Broadband coplanar waveguide to slotline transition having a slo

Details Broadband coplanar waveguide to slotline transition having a slo Broadband coplanar waveguide to slotline transition having a slo

1993-06-17

1995-06-20

Lee, Benny T.

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

333 33, H01P 510

Patent

active

054264006

ABSTRACT:
A broadband coplanar waveguide to slotline transition for transferring radio frequency energy having a wavelength, .lambda., comprises: 1) a dielectric substrate having a first planar surface; an electrically conductive layer formed on the first planar surface; 2) a coplanar waveguide including: a) a center conductor defined by a section of the electrically conductive layer bordered by first and second parallel channels formed in the electrically conductive layer so as to expose the dielectric substrate; b) a first ground plane defined by a section of the electrically conductive layer bordering the first channel; and c) a second ground plane defined by a section of the electrically conductive layer bordering the second channel; 3) a slot cavity formed in the electrically conductive layer so as to expose an area of the dielectric substrate, the slot cavity coextensive with the first channel and having a periphery such that the length of a line segment intersecting two points of the periphery and a centroid of the area is approximately .lambda./4; and 3) a slotline defined by a third channel formed in the electrically conductive layer which is coextensive with the second channel.

REFERENCES:
patent: 3955156 (1976-05-01), Fleming
patent: 3995239 (1976-11-01), Head et al.
patent: 4739519 (1988-04-01), Findley
patent: 4882553 (1989-11-01), Davis et al.
patent: 5125111 (1992-06-01), Trinh
T. Q. Ho and S. M. Hart, "A Broad-Band Coplanar Waveguide to Slotline Tration", IEEE Microwave and Guided Wave Letters, vol. 2, No. 10, Oct. 1992, San Diego, Calif., pp. 415-416.

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