A novel implementation of high frequency switch matrix is proposed in this paper. The solution is based on substrate integrated waveguide (SIW) in low-temperature cofired ceramic (LTCC) technology. The approach demonstrates significant beneficent of using SIW as a connection and cross transmission of the Switch matrix, offering high isolation and good transition performance in high frequency. A K band 4 4 switch matrix is simulated and fabricated, with good performance demonstrated experimentally.Index Terms -Switch matrix, Substrate integrated waveguide, LTCC.

a new physical realization of an elliptic function filter response is proposed for achieving compact size, wide spurious free stop-band and high-selectivity performance. The filter configuration is implemented by Ridged-SIW embedded in a multilayer low-temperature co-fired ceramic (LTCC) structure, which can be easily integrated in a chip module. To validate the concept, two elliptic filters with different input/output coupling structures, micro-strip line coupling and CPW coupling, are designed. The results are verified with the measurements of two filters.

this paper proposes miniaturized band-pass filters with folded substrate integrated waveguide (FSIW) resonators using multilayer low-temperature co-fired ceramic (LTCC) technology. The FSIW resonator is used for the circuit size reduction with its footprint about a half of the conventional TE101 mode. With LTCC technology, it is more flexibility to organize the cavities of filters because of the 3-D arrangement. The vertically stacked cavities are coupled by slots, which can implement different coupling signs with different locations. A new useful topology of FSIW filter is then proposed. Two Ku-band three-order band-pass filters with different transfer responses, Chebyshev and elliptic, are given and verified by experiments. A good agreement between the simulated and measured results is observed, which has also validated the proposed concept of design with the FSIW technology.

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