Ka-band I/Q modulator Multi-Chip Module for high data rate communications
Ka-band I/Q modulator Multi-Chip Module for high data rate communications
复制标题
用于高数据速率通信的 Ka 波段 I/Q 调制器多芯片模块
DOI：
10.1109/aero.2011.5747352
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
J. Lehtonen
中科院分区：
文献类型：
--
作者：
Avinash Sharma;M. Angert;Jacob P. Treadway;Sheng Cheng;P. Malouf;J. Lehtonen
本文介绍了具有 X 波段输入和 Ka 波段输出的飞行合格密封 I/Q 调制器多芯片模块 (MCM) 的开发和测试结果，适用于跟踪和数据中继卫星系统 (TDRSS) 或深空网络 (DSN) 高数据速率通信应用。该模块宽 0.9 英寸，长 1.7 英寸，不带可连接的同轴连接器。它消耗 <500 mW 的直流功率。约翰·霍普金斯大学应用物理实验室 (JHU/APL) 先前开发的 Ka 波段调制器 MMIC 在模块中提供直接 I/Q 调制功能。商用现成 (COTS) MMIC 倍频器提供三倍或四倍功能，用于将 X 波段载波上变频至所选的 Ka 波段输出频率之一。通过安装相应的带通滤波器，多芯片模块可在制造过程中配置为所需的频段。该滤波器与乘法器 MMIC 的偏置一起将上变频载波传递至 I/Q 调制器。调制器后面使用 COTS MMIC 宽带放大器，将输出信号电平提升至约 +10dBm 范围，适合驱动外部 SSPA 或 TWTA。芯片衰减器位于每个功能块之间，用于电平设置和温度补偿。设计了一种创新封装来容纳所描述的电路。该上变频直接调制模块的 TDRSS 和 DSN 版本均已在 JHU/APL 为 NASA 开发的 S/Ka 频段和 X/Ka 频段前沿无线电的 Ka 频段激励器中进行了全面测试并成功实施。无线电测试期间已证明数据速率高达 200 Mbps，目前的目标是超过 300 Mbps。 1 2
This paper describes the development and test results of a flight qualified, hermetic I/Q modulator Multi-Chip Module (MCM) with X-band input and Ka-band output for either Tracking and Data Relay Satellite System (TDRSS) or Deep Space Network (DSN) high data rate communications applications. The module is 0.9″ wide by 1.7″ long without the attachable coaxial connector. It draws <500 mW of DC power. A Ka-band modulator MMIC previously developed by the Johns Hopkins University Applied Physics Laboratory (JHU/APL) provides the direct I/Q modulating function in the module. A Commercial Off The Shelf (COTS) MMIC frequency multiplier provides either a multiply-by-three or a multiply-by-four function for the upconversion of the X-band carrier to one of the Ka-band output frequencies of choice. The multi-chip module is configurable for the desired frequency band during fabrication by installing the corresponding band-pass filter. This filter, along with the biasing of the multiplier MMIC, passes the upconverted carrier to the I/Q modulator. A COTS MMIC broadband amplifier is used following the modulator to boost the output signal level to approximately +10dBm range, suitable for driving an external SSPA or TWTA. Chip attenuators are located between each function block for level setting as well as temperature compensation. An innovative package was designed to house the circuits described. Both the TDRSS and DSN versions of this upconverting direct modulation module have been fully tested and successfully implemented in the Ka-band Exciter of both the S/Ka-band and X/Ka-band Frontier Radio developed by JHU/APL for NASA. A data rate of up to 200 Mbps has been demonstrated during radio test, with current efforts targeting beyond 300 Mbps. 1 2