Abstract
The design and implementation of millimeter-wave full-band waveguide-based spatial power divider/combiner are presented in this paper. The divider/combiner is based on a compact waveguide- to-microstrip (Wg-Ms) probe-array transition structure, providing full-band frequency coverage and low insertion loss. E-cient design and analysis method for this type of power divider/combiner is developed using spectral domain method combined with the image theory. Ka-band two-way (1 £ 2) and four- way (2 £ 2) power combining structures are analyzed and optimized. The performances of the both optimized power dividers/combiners are evaluated by experiments in back-to-back conflgurations. The measured overall insertion loss for the 1£2 power divider/combiner is better than 1.4dB over the entire Ka-band, which demonstrates the low-loss performance of the divdier/combiner. The optimized 2 £ 2 power divider/combiner shows a same performance as the 1 £ 2 structure without any degradation in operating bandwidth and insertion loss.
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