首页|Miniaturized,Wide Stopband Filter Based on Shielded Capacitively Loaded SIW Resonators
Miniaturized,Wide Stopband Filter Based on Shielded Capacitively Loaded SIW Resonators
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Based on the full-mode capacitively loaded substrate integrated waveguide(SIW)resonator and the miniaturized shielded half-mode capacitively loaded SIW(S-HMCSIW)cavities,a novel compact high-performance filter is proposed.The footprint of the half-mode SIW(HMSIW)is further reduced due to the application of the capacitive-loading technique.By applying cross coupling,the proposed SIW filter's transmission zero enhances the stopband rejection and shows excellent selectivity.For the bandpass filter,the measured |S21| and |S11| are better than 1.09 dB and-14 dB,respectively.And a 3-dB fractional bandwidth(FBW)of 9.14-10.76 GHz(FBW=16.2％)is also observed.The filter achieves a wide stopband with a-20 dB out-of-band rejection up to 2.69f0(f0=10 GHz),with a size of 0.39λg× 0.51 λg only.Good agreement between measurement and simulation is obtained.
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