A dual-band transformer-coupled notch filter mixer for 2.45-/5.2-GHz WLAN application

Wong, Yoke Theng and Ramiah, Harikrishnan and Vitee, Nandini (2021) A dual-band transformer-coupled notch filter mixer for 2.45-/5.2-GHz WLAN application. Circuits Systems and Signal Processing, 40 (5). pp. 2159-2175. ISSN 0278-081X, DOI https://doi.org/10.1007/s00034-020-01579-4.

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This paper presents a dual-band down-conversion mixer with image rejection feature using transformer-coupled notch filter for 2.45-/5.2-GHz WLAN application. A single center-tapped transformer is integrated to form two differential series inductor-capacitor (LC) resonators as a filter circuit to create attenuation at the image frequencies in eliminating the signal distortion caused by the image signals. Furthermore, an NMOS cross-coupled pair was adopted in the notch filter to improve the image rejection capability due to the presence of negative resistance. Simulated on a standard 130nm CMOS process, the proposed transformer-coupled notch filter mixer achieves a conversion gain of 15.3/10.7 dB, input-referred third-order interception point (IIP3) of - 6.8/- 2.0 dBm and a noise figure of 8.8/14.8 dB for an input RF of 2.45/5.2 GHz with an IF of 500 MHz. The notch filter mixer consumes 5.5 mW of power from a supply voltage of 1.2 V.

Item Type: Article
Funders: RU Grant-Faculty Program [GPF056B-2020]
Uncontrolled Keywords: Complementary metal-oxide semiconductor (CMOS); Down-conversion mixer; Image rejection; Notch filter; Transformer
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 08 Apr 2022 03:48
Last Modified: 12 Apr 2022 06:56
URI: http://eprints.um.edu.my/id/eprint/27159

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