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Two output structures constructed by multiple apertures in E-and H-planes were designed for a W-band broadband sheet beam traveling wave tube (TWT). E-plane coupler can achieve 32% relative bandwidth and perform excellent port isolation. In comparison, another output coupler built by multi-aperture in H-plane was demon-strated, which is much convenient for PCM focusing system and can be easily integrated...
A new technique for the size reduction of a Marchand balun in conjunction with the integration of additional functions is proposed in this paper. The balun is implemented using two microstrip/coplanar waveguide coupling sections of λ/8 electrical length at its center frequency. This results in a smaller size, innovative integration of microstrip to CPW transition, and the elimination of via holes...
A novel vertically installed planar structure with patterned ground plane had been presented in this paper. It eliminates the existing limitations of conventional vertically installed planar structure, resulting in a simple structure with less fabrication efforts. For demonstration purpose, a 3-dB hybrid coupler was designed based on the proposed improved structure. It was measured to have a good...
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