220-240-GHz High-Gain Phase Shifter Chain and Power Amplifier for Scalable Large Phased-Arrays

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2023

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Department of Electronics and Nanoengineering

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Mcode

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Language

en

Pages

13

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IEEE Access, Volume 11, pp. 23565 - 23577

Abstract

This paper focuses on the design aspects of the key components for a scalable phased-array system over the 200 GHz frequency range. A high-gain phase shifter chain for 220 to 240 GHz frequency range and a high-gain power amplifier (PA) with a high output power are designed in a 0.13-&#x03BC;m SiGe BiCMOS technology. The phase shifter chain includes a low-noise amplifier (LNA), a vector modulator phase shifter (PS), and a gain-enhancing amplifier. The LNA is a five-stage cascode design. The vector modulator core is realized by two variable gain amplifiers based on the Gilbert cell architecture. A four-stage cascode design is used for the gain-enhancing amplifier. The phase shifter chain shows a measured gain of 18 dB at 230 GHz with a 360&#x00B0; phase tuning range and more than 10 dB of gain control. The chip achieves a minimum measured noise figure of 11.5 dB at 230 GHz and shows a wideband noise characteristic. The complete phase shifter chain chip consumes a dc power of 153 mW and occupies a 1.41 mm2 area. A high-power PA that is critical for a large phased-array system is designed. This paper presents a unique 4-way power combining technique utilizing a differential quadrature coupler. The realized balanced PA occupies an area of 0.67 mm2 and shows a measured peak gain of 21 dB at 244 GHz. The PA consumes 819 mW of dc power and delivers a maximum saturated output power (<italic>Psat</italic>) of 7.1 dBm at 244 GHz and more than 4.3 dBm of <italic>Psat</italic> from 230 to 255 GHz.

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Keywords

Differential coupler, Gain, gain tuning, low-noise amplifier, millimeter-wave, MMIC, Noise figure, phase shifter, Phase shifters, phased-array, power amplifier, Power amplifiers, Radio frequency, receiver, Receivers, transmitter, Transmitters

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DOI

10.1109/ACCESS.2023.3253764

Citation

Najmussadat, M, Ahamed, R, Varonen, M, Parveg, D, Kantanen, M & Halonen, K A I 2023, '220-240-GHz High-Gain Phase Shifter Chain and Power Amplifier for Scalable Large Phased-Arrays', IEEE Access, vol. 11, pp. 23565 - 23577. https://doi.org/10.1109/ACCESS.2023.3253764

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https://urn.fi/URN:NBN:fi:aalto-202303292630

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[article-cris] Sähkötekniikan korkeakoulu / ELEC