Planar Probe Coaxial-Waveguide Power Combiner/Divider

• Published in: IEEE transactions on microwave theory and techniques Vol. 57; no. 11; pp. 2761 - 2767
• Main Authors: Kaijun Song, Kaijun Song, Quan Xue, Quan Xue
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.11.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Applied sciences; Arrays; Circuit properties; Coaxial components; Coaxial taper transition; coaxial waveguide; Coaxial waveguides; Dividers; Electric, optical and optoelectronic circuits; Electromagnetic analysis; Electromagnetic scattering; Electromagnetic waveguides; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Exact sciences and technology; microstrip line; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwaves; Noise levels; planar probe; Planar waveguides; power combiner; Power combiners; power divider; Power measurement; Probes; Radiocommunications; Simulation; Telecommunications; Telecommunications and information theory; Waveguide theory; Waveguide transitions; Ku band; Return loss; nucrosmp line; Microwave; planar probe; Centimetric wave; power combiner; Power electronics; TEM mode; Planar antenna arrays; Axial symmetry; Combiner circuit; Power divider; Power combiners; Planar waveguide; Coaxial waveguide; Coaxial taper transition; Taper; Planar technology
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/TMTT.2009.2032483

A novel axially symmetric oversized coaxial waveguide power combiner/divider, which utilizes a planar probe array to transform multiway input to a central oversized coaxial waveguide, is presented in this paper. The use of a coaxial waveguide allows standard transverse electromagnetic design theory to be used, and the characteristics of the coaxial taper transition and the planar probe array are analyzed in detail. A design procedure is also established for the structure. A ten-way planar probe coaxial-waveguide power combiner/divider over the Ku -band is designed and measured. The measured results show a reasonable agreement with the simulated results. The measured 15-dB return-loss bandwidth is approximately 4.3 GHz, and a maximum amplitude imbalance of plusmn 1 dB and a phase imbalance of plusmn5 deg are observed in the 11.5-16-GHz band. Furthermore, the isolation between the peripheral ports is also discussed.