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In this paper, a compact quarter-wavelength stepped-impedance resonator bandpass filter is proposed, two extra transmission zeros are implemented by source-load coupling between the feedlines, a filter with two resonators is designed, each resonator consists of a low-Z section and a high-Z section, good performance is achieved both in passband and stopband. Demonstrator filter is designed on the Rogers...
In this paper, a compact bandpass filter (BPF) with improved stopband characteristics using novel stepped impedance resonators (SIRs) is proposed. The conventional low-impedance stub of SIR is replaced by radial stubs, owing to its intrinsic wide stopband characteristics; the stopband rejection can be widened. A new BPF centered at 1.57 GHz has been designed and fabricated to verify the validity of...
In this paper, a compact bandpass filter (BPF) with improved stopband characteristics using novel stepped impedance resonators (SIRs) is proposed. The conventional low-impedance stub of SIR is replaced by radial stubs, owing to its intrinsic wide stopband characteristics; the stopband rejection can be widened. A new BPF centered at 1.57 GHz has been designed and fabricated to verify the validity of...
In this paper, a new novel compact dual-band bandpass filter is proposed. The module consists of two square defected structure in the ground and a dual-line coupling structure are used for coupling enhancement, the transmission zeros are then introduced to avoid being interfered by the WLAN radio signals by properly via holes. The proposed component is fabricated in a planar microstrip configuration...
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