Balun circuit with a cancellation element in each coupled line

Details Balun circuit with a cancellation element in each coupled line Balun circuit with a cancellation element in each coupled line

1998-03-27

2000-11-21

Bettendorf, Justin P.

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

343859, H01P 510

Patent

active

061508977

ABSTRACT:
A Marchand balun cirucit having a pair of coupled lines of quarter wavelength for dividing and/or combining signals with the same amplitude and opposite phase with each other is improved by inserting a cancellation element between said pair of coupled lines. Said cancellation element may be a transmission line, a capacitor, or an inductor which improves amplitude difference error and phase difference error of a pair of outputs by controlling phase velocity for an even mode so that phase velocity for an even mode becomes equal to that for an odd mode. Thus, a balun circuit with wide operation band, and less error of amplitude difference and phase difference is obtained.

REFERENCES:
patent: 4216446 (1980-08-01), Iwer
patent: 4485488 (1984-11-01), Houdart
patent: 5025232 (1991-06-01), Pavio
patent: 5416451 (1995-05-01), Kaltenecker et al.
patent: 5497137 (1996-03-01), Fujiki
patent: 5644272 (1997-07-01), Dabrowski
patent: 5742901 (1998-04-01), Nishida
Schwindt et al, "Computer-Aided Analysis and Design of a Planar Multilayer Marchand Balun", 8099 IEEE Transactions on Microwave Theory and Techniques, vol. 42, No. 7, Part 2, Jul. 1, 1994, pp. 1429-1434.

Affiliated with

Also associated with

Rating

Balun circuit with a cancellation element in each coupled line does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Balun circuit with a cancellation element in each coupled line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Balun circuit with a cancellation element in each coupled line will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1261431