Title :
Spatial power divider/combiner in D-band
Author_Institution :
Microwave Eng. Dept., Hamburg Univ. of Technol., Germany
Abstract :
Five-element spatial power divider/combiners have been realized at 150 GHz. Holography is applied to couple the field pattern of an in-line rectangular horn antenna array to a pseudoplane wave. The hologram is realized as periodic phase grating. The transformation of the pseudoplane wave to a Gaussian beam is performed by phase modulation with a dual-offset reflector on the one hand, and a system of Fresnel lenses on the other hand. Both setups have been extensively examined. The analysis has been enhanced by a vector near-field measurement system. The comparison of the simulated and measured efficiencies, as well as field distributions shows good agreement.
Keywords :
holography; horn antennas; millimetre wave antenna arrays; offset reflector antennas; phase modulation; power combiners; power dividers; 150 GHz; D-band; Fresnel lens; Gaussian beam; dual-offset reflector; field distributions; hologram; holography; in-line rectangular horn antenna array; periodic phase grating; phase modulation; power combiner; power divider; pseudo-plane wave; spatial power divider/combiner; Antenna arrays; Antenna measurements; Dielectrics; Frequency; Gratings; Holography; Horn antennas; Phase modulation; Power dividers; Submillimeter wave circuits; Dual-offset reflector; Fresnel lenses; grating lobes; holography; horn antennas; periodic structures; phase gratings; spatial power combining/dividing; submillimeter-wave circuits; vector near-field measurement;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2004.835921
