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Detail
Journal Article
125-GHz-band RF receiver front end using 40 nm complementary metal–oxide–semiconductor technology
- Authors
- Seon-Ho Han, Dong-Woo Kang, Bon-Tae Koo
- Issue Date
- 2026-08
- Citation
- ETRI Journal, v.48, no.4, pp.723-730
- ISSN
- 1225-6463
- Publisher
- John Wiley & Sons
- Language
- English
- Type
- Journal Article
- Abstract
- This paper presents a 125-GHz-band radio-frequency (RF) receiver front end designed for radar applications using 40 nm complementary metal–oxide–semiconductor (CMOS) technology. The receiver front-end chip integrates a five-stage single-to-differential low-noise amplifier, transconductance I/Q driver, quadrature I/Q passive mixer, quadrature I/Q transimpedance amplifier, single-to-differential local oscillator (LO) driver, and quadrature I/Q LO generator. Designing an I/Q receiver front end for the 125-GHz band is particularly challenging due to the difficulty of generating and maintaining well-matched I/Q signals at such high frequencies. This work demonstrates highly matched I/Q signal outputs using a simplified circuit architecture that achieves both low power consumption and a compact core chip size. Measurement results of the RF receiver front-end chip reveal a conversion gain of 30 dB, 3 dB bandwidth ranging from 121 GHz to 129 GHz, an input P1dB of −30 dBm, and a double-sideband noise figure of 11.4 dB. The measured gain and phase mismatches between the I and Q channels are only 0.1 dB and 3.6°, respectively. The chip operates with low power consumption, drawing only 80 mA from a 1 V supply. It also features a compact core area of 0.22 mm 2 .
- Keyword
- complementary metal–oxide-semiconductor, Radar, radio frequency, receiver front end, sub-THz
- KSP Keywords
- 2 mm, 3-dB bandwidth, 40 nm, 5-GHz band, Conversion gain, Core area, Double-sideband(DSB), High frequency(HF), I/Q signal, LO generator, Local Oscillator
This work is distributed under the term of Korea Open Government License (KOGL)
(Type 4: : Type 1 + Commercial Use Prohibition+Change Prohibition)
(Type 4: : Type 1 + Commercial Use Prohibition+Change Prohibition)
