Skip to Main content Skip to Navigation
Conference papers

Broadband Balun Using Active Negative Group Delay Circuit

Blaise Ravelo 1 André Pérennec 1 Marc Le Roy 1, *
* Corresponding author
1 Lab-STICC_UBO_MOM_DIM
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance, UBO - Université de Brest
Abstract : In this paper, a broadband balun using an active circuit with negative group delay (NGD) is proposed. The unit cell of the active NGD circuit is based on a Field Effect Transistor (FET) in cascade with an RLC series network. First, a comparison between measurements of a two-stage prototype of this active topology and simulations validate the synthesis method of this innovative device. Then, thanks to the NGD circuit, a constant phase can be generated if this circuit is associated with a classical transmission line. By implementing such phase shifters into the two branches of a resistive splitter, we obtain a new balun topology. The NGD balun simulation results show a rather constant differential output phase (180°±9°), insertion losses above -2.4 dB and an excellent isolation below -59 dB for all three ports, for a bandwidth from 3.5 GHz to 5.5 GHz.
Document type :
Conference papers
Complete list of metadatas

Cited literature [9 references]  Display  Hide  Download

https://hal.univ-brest.fr/hal-00468133
Contributor : Marc Le Roy <>
Submitted on : Tuesday, March 30, 2010 - 10:38:14 AM
Last modification on : Wednesday, June 24, 2020 - 4:19:23 PM
Long-term archiving on: : Thursday, July 1, 2010 - 8:19:05 PM

File

euMc07_final_raveloM.pdf
Files produced by the author(s)

Identifiers

Citation

Blaise Ravelo, André Pérennec, Marc Le Roy. Broadband Balun Using Active Negative Group Delay Circuit. 37th European Microwave Conference, Oct 2007, Munich, Germany. pp.466-469, ⟨10.1109/EUMC.2007.4405228⟩. ⟨hal-00468133⟩

Share

Metrics

Record views

257

Files downloads

590