Browsing by Author "Pawankumar, B."

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A novel 5.1–7.1 GHz front-end power amplifier for wireless applications with ?35 dB Error Vector Magnitude
(Elsevier Ltd, 2024) Pawankumar, B.; Prashantha Kumar, H.
A Power Amplifier (PA) is proposed for WiFi-6E applications, specifically designed to support WLAN 802.11ax standard to achieve significant linear power. The proposed PA is designed to operate in the entire 5 GHz and 6 GHz frequency bands. The design involves a two-stage configuration, initial stage adopts a linear driver, while the subsequent amplification stage is structured as a differential cascode. UMC 65 nm CMOS process technology is used to design a PA in commercial Cadence platform. The layout occupies core area of 0.24 mm2. Proposed PA delivers a power gain of 20 dB, Power Added Efficiency (PAE) of 19% and 1 dB compression point (P1dB) is of 24.5 dB is achieved for continuous wave (CW) signal. For the 802.11ax source, the recorded average power output (Pavg) is 17.1 dBm at an Error Vector Magnitude (EVM) ??35 dB, across the 5–7 GHz. The PA delivers Pavg of 10 dBm at worst corner case in PVT variation analysis. While the majority of recent works in WLAN PA confines the investigation to 5 GHz band, this paper broadens the scope by extending the study by up to 7.050 GHz in 6 GHz band. The incorporation of 6GHz band enables WiFi-6E to utilize up to 1,200 MHz of unencumbered spectrum, significantly enhancing the available bandwidth relative to earlier WiFi standards. The increased bandwidth facilitates high data rate applications, such as streaming and gaming. © 2024 The Authors
A Wi-Fi 6E Tri-Band Power Amplifier for WLAN Applications Featuring a Novel Re-configurable Matching Network
(Birkhauser, 2025) Pawankumar, B.; Prashantha Kumar, H.
This article introduces a novel design methodology of a re-configurable tri-band matching network along with Power Amplifier (PA) that supports the latest WLAN applications. The implemented matching network/circuit, specifically designed for the 2.4 GHz band, enables amplifier to achieve a linear power exceeding 11 dBm. Incorporating the proposed matching circuit, standalone PA is designed to support tri-band operation (2.4 GHz, 5 GHz, and 6 GHz) for the emerging wireless local area network (WLAN) applications. These designs are realized using UMC 65 nm CMOS technology in commercial Cadence Virtuoso design environment with a core area occupying 0.33 mm2. In the 2.4/5/6-GHz WLAN bands, the power amplifier achieves a output power 1-dB compression (P1dB) point ranging from 20.3 to 22.4 dBm, with power-added efficiency (PAE) values ranging from 10 to 16%. The power amplifier delivers an average power output (Pavg) of 11.6–14.5 dBm with an Error Vector Magnitude (EVM) of ? 35 dB for 80-MHz bandwidth WLAN 802.11ax source, with source EVM maintained at ? 50 dB. The standalone PA and novel matching circuit for 2.4 GHz presents one of the first published designs in the literature for tri-band WLAN applications. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.
Power Amplifier for front-end WiFi-6E application
(Institute of Electrical and Electronics Engineers Inc., 2024) Pawankumar, B.; Prashantha Kumar, H.
This paper proposes a dual-band Power Amplifier (PA) suited to WLAN 802.11ax applications in wireless communication. Operating in frequency range of 5GHz to 7GHz, the PA employs a single-transistor design biased in a class-AB configuration. Implemented using UMC 65nm CMOS PDK, the compact layout inclusive of pad frames occupies an area of 880Âµm Ã—418Âµm (0.37mm2). For continuous wave (CW) source, post-layout simulation offers a gain of 11.2dB, output saturated power of 20.8dB and a Power Added Efficiency (PAE) of 20.8%. For 802.11ax MCS-11 signals, linear power output (Pavg) exceeds 12dBm at Error Vector Magnitude (EVM) =-35dB across the 5GHz and 6GHz bands. Unlike most literature that predominantly focuses on WLAN PA studies up to 6GHz, this paper extends the investigation up to 7.050GHz suitable for WiFi-6E application. Â© 2024 IEEE.