Bandpass filter for differential signal, and multifrequency...

Details Bandpass filter for differential signal, and multifrequency... Bandpass filter for differential signal, and multifrequency...

2007-07-31

2007-07-31

Jones, Stephen E. (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S004000

Reexamination Certificate

active

11674499

ABSTRACT:
There is provided a bandpass filter for a differential signal applicable to a device having a wide passband, being a device for transmitting a signal using a differential signal. Respective lines1and2and lines3and4are provide on two surfaces P1and P2at an inner layer of a dielectric body9. Each two lines are arranged symmetrically about the same plane of symmetry C, and the length of each line is a quarter wavelength at the center frequency of a used band. Reference numerals5and6are input/output ends of the lines1and2, and7and8are input output ends of lines3and4. Opposite ends to the input output ends are open. If a differential signal is input to terminals5, 6, a differential output appears at the terminals7, 8. This device works as a bandpass filter.

REFERENCES:
patent: 7102455 (2006-09-01), Lin et al.

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