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In this paper, two wideband bandpass filters are presented, which combines half mode substrate integrated waveguide (HMSIW) with a pair of face to face improved dumbbells defected ground structure (DGS) cells. The proposed DGS cell have a good sideband selectivity feature compared with the conventional dumbbell DGS . To validate the methodology, two filters, i.e., one-stage and three-stage,with center...
In this paper, a half mode substrate integrated waveguide (HMSIW) mixer at Ka-band is proposed. A newly developed 3-dB cruciform HMSIW coupler was employed to add LO and RF signal on schottky diodes. Size of the mixer is more compact than traditional narrow-wall aperture coupling SIW or HMSIW configuration mixer. The mixer was designed and fabricated on Roggers 5880 substrate with beam lead schottky...
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