具有 I/Q 不平衡和 LO 馈入校准功能的 248-GHz 次谐波混频器末级发射机

IF 2.2 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

IEEE Solid-State Circuits Letters Pub Date : 2024-04-10 DOI:10.1109/LSSC.2024.3387285

Seunghoon Lee;Junhyeong Kim;Kangseop Lee;Ho-Jin Song

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引用次数: 0

摘要

这封信介绍了一种 248 GHz 紧凑型直接转换发射机，它具有 IQ 和 LO 馈通（LOFT）校准功能，可通过 16-QAM 实现 20-Gb/s 的数据传输速率。发射机设计采用了亚谐波双平衡混频器配置，简化了本地振荡器（LO）链的复杂性。此外，还使用了一个威尔金森功率分压器和一条由可变电容端接的传输线，以产生具有 45° 相位差的 LO 信号。这种配置与可变增益放大器相结合，实现了 IQ 振幅和相位的精确平衡。在 242-252 GHz 范围内，测量到的图像抑制比和 LOFT 抑制比分别优于 25 和 28 dB。发射机的直流功耗为 96.3 mW。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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248-GHz Subharmonic Mixer Last Transmitter With I/Q Imbalance and LO Feedthrough Calibration

This letter presents a 248 GHz compact direct-conversion transmitter with IQ and LO feedthrough (LOFT) calibration capability, which can achieve a data rate of 20-Gb/s with 16-QAM. The transmitter design incorporates a subharmonic double-balanced mixer configuration, simplifying the complexity of the local oscillator (LO) chain. Furthermore, a Wilkinson power divider and a transmission line terminated by variable capacitors are used to generate LO signals with a 45° phase difference. This configuration, combined with variable gain amplifiers, allows for the precise balancing of IQ amplitude and phase. The measured image rejection ratio and LOFT suppression ratio are better than 25 and 28 dB, respectively, in the range of 242–252 GHz. The DC power consumption of the transmitter is 96.3 mW.

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来源期刊

IEEE Solid-State Circuits Letters Engineering-Electrical and Electronic Engineering

CiteScore

4.30

自引率

3.70%

发文量