Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2006-09-05
2006-09-05
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S219000
Reexamination Certificate
active
07102470
ABSTRACT:
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.
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Chang Sheng-Fuh
Chang Shuen-Chien
Chen Albert
Chen Hung-Cheng
Chen Jia-Liang
Birch & Stewart Kolasch & Birch, LLP
Ham Seungsook
Integrated System Solution Corp.
Sheng-Fuh Chang
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