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Planar diplexer for microwave integrated circuits

Planar diplexer for microwave integrated circuits

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A planar microwave diplexer based on the substrate integrated waveguide (SIW) technique is presented in the paper. The SIW-microstrip transition and SIW filter are experimentally investigated, and then a C-band SIW diplexer is designed and fabricated using a standard PCB process. The relative bandwidths of up and down channels are 3% and 4.8% at 5.96 GHz and 5.42 GHz, respectively. The measured results show good channel isolation, moderate insert losses and small return losses in pass-bands. The diplexer takes a planar form and can be easily integrated in microwave integrated circuits.

Inspec keywords: integrated circuit design; planar waveguides; microwave filters; microstrip filters; multiplexing equipment; telecommunication channels; microwave integrated circuits; microstrip transitions

Other keywords: channel isolation; microstrip transition; SIW technique; planar microwave diplexer; SIW filter; standard PCB process; substrate integrated waveguide; C-band SIW diplexer; microwave integrated circuit

Subjects: Waveguides and microwave transmission lines; Waveguide and microwave transmission line components; Semiconductor integrated circuit design, layout, modelling and testing; Filters and other networks; Microwave integrated circuits

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