A Novel millimeter-wave Substrate Integrated Waveguide (SIW) filter buried in LTCC

A novel millimeter-wave SIW filter buried in LTCC has been analyzed and designed in this paper. We uses metallic via arrays mounted in SIW to substitute E-plane iris in RW. Meanwhile LTCC technology is implemented to realize further compact size of this filter. Through a design procedure introduced in this paper we get the initial parameter fast and accurately, and then designed a five poles, 34.1-35.9GHz filter, which presents 1.8dB insertion loss and the return loss is better than -21dB in the entire passband. Besides compact size and good performance, the filter occupies rather little space on the substrate surface, which has important significance for system's miniaturization.