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Sensors 2015, 15(5), 10791-10805;

Toward Realization of 2.4 GHz Balunless Narrowband Receiver Front-End for Short Range Wireless Applications

King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia
Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4K1, Canada
Author to whom correspondence should be addressed.
Academic Editor: Leonhard M. Reindl
Received: 26 February 2015 / Revised: 8 April 2015 / Accepted: 24 April 2015 / Published: 7 May 2015
(This article belongs to the Section Sensor Networks)
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The demand for radio frequency (RF) transceivers operating at 2.4 GHz band has attracted considerable research interest due to the advancement in short range wireless technologies. The performance of RF transceivers depends heavily on the transmitter and receiver front-ends. The receiver front-end is comprised of a low-noise amplifier (LNA) and a downconversion mixer. There are very few designs that focus on connecting the single-ended output LNA to a double-balanced mixer without the use of on-chip transformer, also known as a balun. The objective of designing such a receiver front-end is to achieve high integration and low power consumption. To meet these requirements, we present the design of fully-integrated 2.4 GHz receiver front-end, consisting of a narrow-band LNA and a double balanced mixer without using a balun. Here, the single-ended RF output signal of the LNA is translated into differential signal using an NMOS-PMOS (n-channel metal-oxide-semiconductor, p-channel metal-oxide-semiconductor) transistor differential pair instead of the conventional NMOS-NMOS transistor configuration, for the RF amplification stage of the double-balanced mixer. The proposed receiver circuit fabricated using TSMC 0.18 µm CMOS technology operates at 2.4 GHz and produces an output signal at 300 MHz. The fabricated receiver achieves a gain of 16.3 dB and consumes only 6.74 mW operating at 1.5 V, while utilizing 2.08 mm2 of chip area. Measurement results demonstrate the effectiveness and suitability of the proposed receiver for short-range wireless applications, such as in wireless sensor network (WSN). View Full-Text
Keywords: CMOS; narrowband receiver; radio frequency (RF); short-range; wireless sensor network (WSN) CMOS; narrowband receiver; radio frequency (RF); short-range; wireless sensor network (WSN)

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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El-Desouki, M.M.; Qasim, S.M.; BenSaleh, M.S.; Deen, M.J. Toward Realization of 2.4 GHz Balunless Narrowband Receiver Front-End for Short Range Wireless Applications. Sensors 2015, 15, 10791-10805.

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