—In this letter, a novel approach to the design of a commonly known branch line directional couplers is presented for operation in a differential mode. The couplers are analyzed in a two-mode structure and realized in a symmetric two-conductor-over-ground transmission line technique. Moreover, the investigation on the possible miniaturization of such circuits is presented. The results of theoretical analysis are verified by the measurement of the fabricated circuits.
—Balanced-mode components, directional couplers, branch-line couplers, miniaturized couplers.
The authors are with the Electronic Department, AGH University of Science and Technology, Av. Mickiewicza 30, 30-059 Krakow, Poland (corresponding author: S. Gruszczynski, tel.: 0048-12-6173021, fax: 0048-12-633-23-98, e-mail: email@example.com).
Cite:J. Sorocki, I. Piekarz, K. Staszek, P. Kaminski, K. Wincza, and S. Gruszczynski, "Differential-Mode Branch-Line Directional Couplers," International Journal of Information and Electronics Engineering vol. 6, no. 4, pp. 226-229, 2016.