Birch, Stewart, Kolasch & Birch, LLP
Dual-band bandpass filter with stepped-impedance resonators
A dual-band bandpass filter with stepped-impedance resonators uses only one circuit to generate dual-band effect. It adopts the principle of stepped-impedance resonator, which contains a connecting section and two coupling sections. The impedance and electrical length of the connecting section and coupling sections conforms to a selected condition to generate two passbands at desired frequencies. A multi-layer broadside-coupled parallel lines structure may be applied to increase coupling-amount between the parallel lines so that the dual-band bandpass filters have broader bandwidth and less loss.
Sheng-Fuh Chang Integrated System Solution Corp.
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inventional inventional inventional
Jia-Liang Albert Sheng-Fuh Shuen-Chien Hung-Cheng Shu-Fen Shih-Chieh
Chen Chen Chang Chang Chen Tang Chen