Patent ID: 7482894

Claim:
A radial power divider/combiner comprising: a base having a center and a periphery; a plurality of waveguides, each of which extends along a respective direction between the center of the base and the periphery thereof; wherein each of the waveguides is defined at least in part by a respective groove in the base; and wherein (i) at least one of the waveguides has a central portion proximate the center of the base, a peripheral portion proximate the periphery of the base, and a transformer portion disposed between the central portion and the peripheral portion, (ii) the central portion has a first transverse cross-sectional area, (iii) the peripheral portion has a second transverse cross-sectional area, and (iv) the transformer portion has a third transverse cross-sectional area that is less than the first cross-sectional area and greater than the second transverse cross-sectional area, wherein the transformer portion has a transverse cross-sectional area that varies linearly along the direction along which the waveguide extends.