© The Institution of Engineering and Technology
A quasi-elliptic bandpass filter has been designated based on substrate integrated waveguide cavity and parallel-coupled microstrip line (PCML). Two PCMLs are utilised to provide cross-coupling at both sides of the investigated filter. Electrical coupling intensity in the filter can be controlled by the proposed PCMLs which generate transmission zeros at sides of pass-band. Sharp sideband and significant out-of-band rejection are achieved.
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