System method and apparatus for a three-line balun with...

Details System method and apparatus for a three-line balun with... System method and apparatus for a three-line balun with...

2006-01-03

2006-01-03

Nguyen, Hoang V. (Department: 2821)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C336S232000, C343S821000

Reexamination Certificate

active

06982609

ABSTRACT:
A balun that includes a first conductor, a second conductor and a third conductor. The first conductor has a length of about one quarter wavelength of a selected center frequency. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has a length of about one quarter wavelength of the selected center frequency. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected a second end of the first conductor. The third conductor has a length of about one quarter wavelength of the selected center frequency. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.

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patent: 6278340 (2001-08-01), Liu
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patent: 2002/0034934 (2002-03-01), Watanabe et al.
Choonsik Cho, “A New Design Procedure for Single-Layer and Two-Layer Three-Line Baluns”, IEEE Transactions On Microwave Theory And Techniques, vol. 46, No. 12, Dec. 1998.

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