Ka-Band Cubically Symmetric Turnstile Power Combiner
Final rept. Oct 1985-Sep 1987
NAVAL WEAPONS CENTER CHINA LAKE CA
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This report describes a novel six-port turnstile-type power combiner for use as a four-way transmission- or reflection- type power combiner divider. This unique turnstile is rotationally symmetric about its four major diagonals, thus ensuring equal power divisioncombination. Each pair of opposing waveguide inputs is orthogonally oriented to provide excellent cross-port isolation. Generalized scattering matrices are used to analyze six-port junction turnstiles of varying degrees of symmetry. Scattering matrix analysis is used to demonstrate further the reflective and transmissive modes of turnstile power combining. Three versions of cubically symmetric turnstile that were evaluated for use in the 26.5- to 40.- gigahertz frequency band are described. The final turnstile version was integrated with four single-IMPATT oscillator modules to demonstrate transmission-mode power combining. Potential benefits of cascaded and extended level turnstile combining include high-power generation at millimeter- and submillimeter-wave frequencies.
- Electrical and Electronic Equipment
- Electric Power Production and Distribution