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In this paper, we present a systematic analysis of periodic structures based on substrate integrated waveguide (SIW) technology. In the periodic structures of interest, the unit cell is a circularly-shaped SIW section, which can be extended to any shape. In the beginning, the propagation constants of both even and odd modes of the SIW periodic structures are accurately extracted with the help of a...
In this paper, we present a very compact ultra-wideband (UWB) filter (patent pending), which is integrated in a commercial leaded package. This UWB filter is designed through quasi-equally allocating the first three resonant frequencies of the stub-loaded resonator. Input/output excitation is realized by a technique of wire-bonded interdigital capacitors for obtaining strong wideband coupling. After...
Substrate Integrated Waveguide (SIW) has been demonstrated for the design of low-cost planar waveguide bandpass filters in the same process as planar circuits. However, SIW cavity resonator generally has a finite Qu of around 500 with most commonly used dielectric substrates, which rounds the passband edge and reduces the effective bandwidth of narrowband filter. In this paper, a K-band bandpass filter...
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