Dual band coupled-line balanced-to-unbalanced bandpass filter

Details Dual band coupled-line balanced-to-unbalanced bandpass filter Dual band coupled-line balanced-to-unbalanced bandpass filter

2007-03-23

2009-06-02

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S033000, C333S204000

Reexamination Certificate

active

07541888

ABSTRACT:
A dual band balun filter that includes a first coupled-line section pair provided with a first terminal; a second coupled-line section pair configured to be connected to the first coupled-line section pair, a third coupled-line section pair, and a fourth coupled-line section pair, respectively, and the fourth coupled-line section pair is provided with a second terminal; the third coupled-line section pair is provided with a transmission line and is connected to a fifth coupled-line section pair that is provided with a third terminal; and each of the first to fifth coupled-line section pairs is formed with partial coupled stepped impedance resonators (SIRs).

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