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A novel six‐port circuit based on four quadrature hybrids
Author(s) -
Li Chaojiang,
Zhang Hanqiao,
Wang Pingshan
Publication year - 2010
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20410
Subject(s) - microstrip , port (circuit theory) , microwave , inductor , electrical engineering , quadrature (astronomy) , electronic engineering , cmos , circuit design , monolithic microwave integrated circuit , engineering , optoelectronics , materials science , telecommunications , voltage , amplifier
A novel six‐port circuit is proposed and demonstrated. The circuit is based on four quadrature hybrids. A prototype circuit is fabricated and characterized with microstrip lines. Reflection coefficients for a few loads are measured with the fabricated circuit to evaluate its performance. The results agree with those from an HP8510C network analyzer reasonably well. Using active inductors and varactors, the six‐port circuit is also designed with a 0.13 μm CMOS process. The simulation results show that the operating frequency is tunable from 1 to 6.8 GHz. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2010.