Integrated bandpass/bandstop coupled line filter

Details Integrated bandpass/bandstop coupled line filter Integrated bandpass/bandstop coupled line filter

2007-01-16

2009-08-11

Tran, Anh Q (Department: 2819)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S204000, C333S238000

Reexamination Certificate

active

07573355

ABSTRACT:
An apparatus and method for attenuating selected frequency bands in a microstrip filter having a plurality of microstrip resonators. The filter comprises plural resonators, a first of the plural resonators is operatively connected to a first feed point and a second of the plural resonators is operatively connected to a second feed point. A third of the plural resonators is a half wavelength resonator and may be operatively connected to the first, second and/or other plural resonators. The third resonator may also comprise a plurality of resonators whereby the position and number of the third resonator is a function of a predetermined rejected frequency range.

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PCT International Search Report and Written Opinion dated Jul. 8, 2008 for International Application No. PCT/US08/51090.

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