A Monolithic Low Noise Channelized Active Bandpass Filter Using GaAs 0.15 µm Technology

ABSTRACT

In this study, a monolithic microwave integrated circuit channelized active bandpass filter using noise cancelling circuit is presented. We propose a new structure on the channelized bandpass filter. By adding output currents of three bandpass filters and using current to voltage converter, the proposed three-channel bandpass filter is achieved. In designing each bandpass filter, a recursive differential structure has been used. Also, to decrease the noise of this filter, a new noise cancelling circuit operated in a wide range from 1 to 7 GHz is investigated. By using this circuit, input impedance matching is obtained simultaneously. The chip has been implemented using GaAs 0.15 µm technology and occupies an area of 2.5 × 2.4 mm². The post layout simulation results show a noise figure of 1.4–3.7 dB with a good input and output impedance matching less than −10 dB. The centre frequencies of channelized filter are 2, 4, and 6 GHz while the voltage gains are 18, 12, and 10 dB, respectively. The circuit power consumption is 250 mW.

KEYWORDS:

• Channelized filter
• Current to voltage converter
• Impedance matching
• MMIC
• Noise cancelling
• Noise figure

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Amin Alahyari

Amin Alahyari received the BS degree in electrical engineering from Razi University, Kermanshah, Iran, in 2006, and the MS degree in electronics from Islamic Azad University, Arak, Iran, in 2009. He is working toward PhD degree in electronics from Islamic Azad University, Arak, Iran. He works on designing high frequency tunable filters and low noise amplifiers using MMIC technology.

E-mail: [email protected]

Massoud Dousti

Mohammad Bagher Tavakoli was born in Arak, Iran, in 1978. He received PhD degree from Science and Research Branch, Islamic Azad University in 2013. He received MS and BS degrees from Department of Electronic, Arak Branch, Islamic Azad University in 2006 and 2003, respectively. He became an associate professor at the Islamic Azad University of Arak in 2013. He is Deputy of Faculty of Engineering in Islamic Azad University of Arak.

E-mail: [email protected]

Mohammad Bagher Tavakoli

Massoud Dousti received BS degree in Electrical Engineering from Orleans University, Orleans, France and MS degree in Electronics (Microwave and Optics) from Limoges University, Limoges, France, in 1991 and 1994 and PhD degree in Electronics (Active Microwave Circuits) from University of Paris VI, Pierre et Marie Currie, in 1999, respectively. He served as a teaching assistant in the Department of Electrical Engineering at Ensea, Cergy Pontoise, France from 1998 to 2000. In 2001 he joined Department of Electrical Engineering of Science and Research Branch, Islamic Azad University, Tehran, Iran, where he is now an associate professor. His research interests are linear and non-linear microwave/RF circuits and systems design, millimetre wave circuits design, and MMIC technology.

E-mail: [email protected]