DC-to-89-GHz AMUX-Based IQ Modulator in 250-nm InP HBT Technology for Multiplexing-DAC Subsystem

0 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE microwave and wireless technology letters Pub Date : 2025-04-01 DOI:10.1109/LMWT.2025.3552690

Munehiko Nagatani;Hitoshi Wakita;Teruo Jyo;Yuta Shiratori;Miwa Mutoh;Akira Kawai;Masanori Nakamura;Fukutaro Hamaoka;Hiroshi Yamazaki;Takayuki Kobayashi;Yutaka Miyamoto;Hiroyuki Takahashi

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Abstract

This article presents an ultra broadband in-phase and quadrature (IQ) modulator in 250-nm InP heterojunction bipolar transistor (HBT) technology for a multiplexing-digital-to-analog converter (DAC) subsystem enabling high-symbol-rate baseband signal generation in optical communications. The IQ modulator consists of two analog multiplexers (AMUXs), data/clock buffers, a quadrature filter, a linear adder, and an output buffer. The fabricated AMUX-based IQ modulator integrated circuit (IC) has a bandwidth of 98 GHz ranging from direct current (DC) and consumes a total power of 880 mW with a supply voltage of −4.0 V. The packaged IQ modulator module with coaxial connectors maintains a bandwidth of 89 GHz. Using the multiplexing-DAC subsystem based on this module, high-symbol-rate baseband signal generations and optical modulations up to 168-GBaud 16-ary quadrature amplitude modulation (16QAM) were successfully demonstrated. To the best of our knowledge, this is the broadest bandwidth IQ modulator reported to date.

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用于多路dac子系统的250nm InP HBT技术的dc -89 ghz amux IQ调制器

本文介绍了一种采用250nm InP异质结双极晶体管（HBT）技术的超宽带同相正交（IQ）调制器，用于多路数模转换器（DAC）子系统，可在光通信中产生高符号速率基带信号。IQ调制器由两个模拟多路复用器（AMUXs）、数据/时钟缓冲器、正交滤波器、线性加法器和输出缓冲器组成。所制备的基于amux的IQ调制器集成电路（IC）带宽为98 GHz，范围为直流（DC），功耗为880 mW，电源电压为−4.0 V。带有同轴连接器的封装IQ调制器模块保持了89 GHz的带宽。利用基于该模块的多路复用dac子系统，成功实现了高符号速率基带信号生成和高达168gbaud的16编正交调幅（16QAM）光调制。据我们所知，这是迄今为止报道的最宽带宽IQ调制器。

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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来源期刊

IEEE microwave and wireless technology letters

CiteScore

6.00

自引率

0.00%

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