Abstract
This paper proposes some novel substrate-integrated waveguide (SIW) bandpass filters combined with planar resonators. According to specific topologies, microstrip lines with different electrical lengths are introduced into their designs. Their corresponding phase-shift characteristics are used to obtain the desired couplings between SIW cavities and the microstrip resonator. Two third-order filter samples are realized. One has a single transmission zero below the passband and the other possesses a quasi-elliptic response. Further, a fourth-order filter is developed by effectively superpositing two individual third-order topologies. It shows better frequency selectivity and flat in-band group delay, with good agreement between the measured and the simulated <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">S</i> -parameters. Their compactness and high rejection in the stopbands make them very suitable for system-on-package.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
