Importance

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Abstract

A microwave line structure which has a first conducting track applied onto a substrate and a second conducting track which extends, supported on posts, at a distance above the first conducting track, a coplanar line being arranged, in addition to the microstrip line formed by the first conducting track and the second conducting track, on the substrate and coupled to this microstrip line, and the microstrip line extending between the two conducting tracks of the coplanar line, wherein, at one end of the coplanar line, the two conducting tracks of the latter are electrically conductingly connected to one another and to the first conducting track, wherein at the other end of the coplanar line the latter is open, wherein the length of the coplanar line is approximately equal to one quarter of the wavelength of the average operating frequency and wherein an asymmetrical line can be coupled to the first conducting track and the second conducting track at the short-circuited end of the coplanar line and a symmetrical two-wire line can be coupled to the open end of the coplanar line. Multi-application balancing circuit in monolithic integrated coplanar microwave technology for above 60 GHz. Use in mixers, modulators, amplifiers, etc. of radio link systems.

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First Claim