A 60 GHz embedded SIW (substrate integrated waveguide) BPF Considering the Transition Effect

Quasi-Elliptic and Chebyshev Compact LTCC Multi-Pole Filters Functioning in the Submillimetric Wave Region at 150 GHz

“…Since this negative coupling is indispensable, the proposed structure should assure a topology that creates this coupling while conserving the compactness of the filter and the ability to be fabricated by the LTCC technology. As described in [9], it is theoretically possible, in a four-pole quasi-elliptic filter, to move the negative sign of the coupling between cavities 1 and 4 (see matrix (4)) to the coupling between cavities 1 and 2 (the coupling between cavities 1 and 4 is thus positive). This produces exactly the same filtering behavior and can help the designer to obtain the required negative coupling.…”

“…The ideal coupling matrix of a filter having four-pole and two transmission zeroes is given in (4), shown at the bottom of this page. The filter is centered at 150 GHz with 1.33% pass band, 5.5 dB insertion loss, 15 dB return loss and 20 dB of rejection in the out of band GHz.…”

“…Indeed, the operating frequencies of filters realized by LTCC were limited to the millimeter wave ranges. Several approaches are proposed for designing LTCC filters functioning around 60 GHz [2]- [4].…”

Low insertion loss substrate integrated waveguide quasi-elliptic filters for V-band wireless personal area network applications

“…A comprehensive review of state-of-the-art in SIW research is given in [7]. Furthermore, several V-band components have been designed with SIW technology [8][9][10].…”

“…An SIW filter demonstrated in [9] had 3 dB insertion loss at 61-63 and 15 dB return loss as well as out-of-band rejection of 25 and 15 dB for lower and upper stopbands, respectively. A multilayer SIW low temperature co-fired ceramic (LTCC) filter was reported in [10] with insertion loss of 2 dB and return loss of 16 dB at 57-64 GHz as well as out-of-band rejection of 33 and 25 dB for lower and upper stopbands at 3 GHz outside the passband. In [10], however, in order to achieve 2 dB insertion loss, an additional compensation circuit was implemented.…”