An E-Band High-Precision Active Phase Shifter Based on Inductive Compensation and Series Peaking Enhancement Techniques

Jiang, Lingtao; Cai, Bing; Huang, Shangyao; Que, Xianfeng; Wang, Yanjie

doi:10.3390/electronics14173545

Open AccessArticle

An E-Band High-Precision Active Phase Shifter Based on Inductive Compensation and Series Peaking Enhancement Techniques

by

Lingtao Jiang

^1,†,

Bing Cai

^1,†,

Shangyao Huang

²,

Xianfeng Que

¹ and

Yanjie Wang

^1,*

¹

School of Microelectronics, South China University of Technology, Guangzhou 511442, China

²

School of Artificial Intelligence, Zhuhai City Polytechnic, Zhuhai 519090, China

^*

Author to whom correspondence should be addressed.

^†

Co-first Authors.

Electronics 2025, 14(17), 3545; https://doi.org/10.3390/electronics14173545

Submission received: 11 August 2025 / Revised: 31 August 2025 / Accepted: 4 September 2025 / Published: 5 September 2025

(This article belongs to the Collection Advanced Design Techniques and EDA Methodologies for Analog, RF and MM-Wave Circuit Design)

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Abstract

This paper presents the design and implementation of a 6-bit high-precision active vector-sum phase shifter (PS) operating in the E-band, fabricated using a 40 nm CMOS process. To generate high-quality in-phase and quadrature (I/Q) signals, a folded transformer-based quadrature generator circuit (QGC) employing inductive compensation is developed. Additionally, the series peaking enhancement technique is applied to improve overall gain and effectively extend the bandwidth. Measurement results demonstrate that the phase shifter achieves a 3 dB bandwidth from 72.3 GHz to 82.3 GHz. Within this range, the measured RMS phase error is merely 1.78–2.55 degrees without calibration, and the RMS gain error is 0.6–0.75 dB. The core area of the proposed phase shifter is 940 μm × 280 μm, and it consumes 57.2 mW of power with a 1.1 V supply.

Keywords: CMOS; active phase shifter; quadrature generator circuit; E-band; phase array

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MDPI and ACS Style

Jiang, L.; Cai, B.; Huang, S.; Que, X.; Wang, Y. An E-Band High-Precision Active Phase Shifter Based on Inductive Compensation and Series Peaking Enhancement Techniques. Electronics 2025, 14, 3545. https://doi.org/10.3390/electronics14173545

AMA Style

Jiang L, Cai B, Huang S, Que X, Wang Y. An E-Band High-Precision Active Phase Shifter Based on Inductive Compensation and Series Peaking Enhancement Techniques. Electronics. 2025; 14(17):3545. https://doi.org/10.3390/electronics14173545

Chicago/Turabian Style

Jiang, Lingtao, Bing Cai, Shangyao Huang, Xianfeng Que, and Yanjie Wang. 2025. "An E-Band High-Precision Active Phase Shifter Based on Inductive Compensation and Series Peaking Enhancement Techniques" Electronics 14, no. 17: 3545. https://doi.org/10.3390/electronics14173545

APA Style

Jiang, L., Cai, B., Huang, S., Que, X., & Wang, Y. (2025). An E-Band High-Precision Active Phase Shifter Based on Inductive Compensation and Series Peaking Enhancement Techniques. Electronics, 14(17), 3545. https://doi.org/10.3390/electronics14173545

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An E-Band High-Precision Active Phase Shifter Based on Inductive Compensation and Series Peaking Enhancement Techniques

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