A 28.4-to-39.2 GHz Low-Power Injection-Locked Frequency Quadrupler With Reconfigurable Pre-Filter-Amplifier

IF 4.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2025-06-13 DOI:10.1109/TCSII.2025.3579551

Kai Li;Zhipeng Wang;Fanyi Meng;Kaixue Ma;Keping Wang

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引用次数: 0

Abstract

In this brief, a 28.4 to 39.2 GHz injection-locked frequency quadrupler (ILFQ) is fabricated in a 65nm CMOS process. A reconfigurable pre-filter-amplifier (RPFA) structure is proposed to pre-process the output current of the harmonic generator. By switching between two modes, the RPFA effectively filters out the undesired harmonics and amplifies the desired 4th harmonic. Therefore, both the harmonic rejection and locking range of the ILFQ are improved. In addition, a load tank based on a three-coil coupled transformer and an impedance-boosting transformer is designed to further extend the locking range, increase the output power, and reduce the DC power consumption. The measured results show that the proposed ILFQ achieves a 31.9% locking range (28.4 GHz to 39.2 GHz). Across the whole locking range, the measured 1st/2nd/3rd harmonic rejection ratio (HRR) is better than 42.4/37.4/15 dBc, respectively. Within the range of 28.4 to 36.2 GHz, >29 dBc 1st/2nd/3rd HRR is achieved. The measured maximum DC power consumption is 13.3 mW.

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带可重构预滤波器放大器的28.4 ~ 39.2 GHz低功率注入锁频四倍器

本文采用65nm CMOS工艺制作了28.4 ~ 39.2 GHz注入锁频四倍器（ILFQ）。提出了一种可重构预滤波放大器（RPFA）结构，对谐波发生器输出电流进行预处理。通过在两种模式之间切换，RPFA有效地滤除不需要的谐波并放大所需的四次谐波。因此，ILFQ的谐波抑制和锁定范围都得到了提高。此外，设计了基于三圈耦合变压器和升压变压器的负载槽，进一步扩大了锁紧范围，提高了输出功率，降低了直流功耗。测量结果表明，该ILFQ的锁定范围为31.9% （28.4 GHz ~ 39.2 GHz）。在整个锁定范围内，测量到的1 /2 /3次谐波抑制比（HRR）分别优于42.4/37.4/15 dBc。在28.4 ~ 36.2 GHz范围内，实现bbb29 dBc的第一/第二/第三HRR。测量到的最大直流功耗为13.3 mW。

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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.