Substrate Integrated Waveguide Cross-Coupled Filter With Negative Coupling Structure

By Xiaoping Chen, Ke Wu. IEEE transactions on microwave theory and techniques, 2008

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Current and Future Research Trends in Substrate Integrated Waveguide Technology (2009, background): “Subsequently, cavity filters with circular [13] and rectangular cavities [14] were developed: they permit a better design flexibility and exhibit higher selectivity, thanks to the cross-coupling that introduces transmission zeros.”
Resonance Characteristics of Substrate-Integrated Rectangular Cavity and Their Applications to Dual-Band and Wide-Stopband Bandpass Filters Design (2017, methodology): “The electric cross coupling between SIRCs 1 and 4 is implemented by balanced microstrip lines with a pair of metalized via-holes proposed in [2], which has been detailed in the top-left corner in Fig.”
Compact Low-Loss Integration of High- $Q$ 3-D Filters With Highly Efficient Antennas (2011, background): “…[1], evanescent-mode cavities [2], [3], dielectric resonators (DRs) [4]–[6], nonplanar combline structures [7], [8], quasi-planar electromagnetic bandgap (EBG) structures [9]–[11], or substrate integrated waveguides (SIWs) [12], [13] are necessary rather than lowplanar transmission line structures.”
Substrate Integrated Waveguide Filter With Improved Stopband Performance for Satellite Ground Terminal (2009, methodology): “The parameters of the cavity for the defined position of the transmission zero are then adjusted using the models in Fig.”