Band pass filter

Details Band pass filter Band pass filter

2005-06-07

2005-06-07

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S0990MP, C505S210000

Reexamination Certificate

active

06903632

ABSTRACT:
A band pass filter configured by a planar structure circuit, includes resonators of distribution constant circuit type, transmission line paths coupling the resonators and excitation lines arranged at input/output sides. The transmission line path is provided with line path portions coupling the resonators or the resonator and the excitation line. The line path portion have a length which is (1+2m)/4-fold (m: natural number) of a wavelength corresponding to a center frequency of the frequency band, and each coupling part between the resonators and the line portion has a length substantially determined as a ¼ wavelength.

REFERENCES:
patent: 5648747 (1997-07-01), Grothe et al.
patent: 6130189 (2000-10-01), Matthaei
Hey-Shipton, G., “Efficient Computer Design of Compact Planar Band-Pass Filters Using electrically Short Multiple Coupled Lines”, IEEE MTT-S Digest, pp. 1547-1550, (1999).
Raihn, K. et al., “Highly Selective HTS Band Pass Filter with Multiple Resonator Cross-Couplings”, IEEE MTT-S Digest, pp. 661-664, (2000).
Tsuzuki, G. et al., “Ultra Selective 22-Pole, 10-Transmission Zero Superconducting Bandpass Filter Surpasses 50 Pole Chebyshev Rejection”, IEEE MTT-S CDROM, pp. 1963-1966, (2002).
Tsuzuki, G. et al., “Ultra Selective 22-Pole, 10-Transmission Zero Superconducting Bandpass Filter Surpasses 50 Pole Chebyshev Filter”, IEEE Transactions on Microwave Theory and Techniques, vol. 50, No. 12, pp. 2924-2929, Dec. 2002.
Hong, J. et al., “Transmission Line Filters with Advanced Filtering Characteristics”, IEEE MTT-S Digest, pp. 319-322, (2000).
Hong, J. et al., “Couplings of Microstrip Square Open-Loop Resonators for Cross-Coupled Planar Microwave Filters”, IEEE Transactions on Microwave Theory and Techniques, vol. 44, No. 12, pp. 2099-2109, Dec. 1996.
Hong, J. et al., “On the Development of Superconducting Microstrip Filters for Mobile Communications Applications”, IEEE Transactions on Microwave Theory and Techniques, vol. 47, No. 9, pp. 1656-1663, Sep. 1999.
Hong, J. et al., “On the Performance of HTS Microstrip Quasi-Elliptic Function Filters for Mobile Communications Application”, IEEE Transactions on Microwave Theory and Techniques, vol. 48, No. 7, pp. 1240-1246, Jul. 2000.
Tsuzuki, G. et al., “Novel Superconducting Ring Filter”, IEEE MTT-S Digest, pp. 379-382.

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