Skip Navigation
SBIR/STTR

Active MMIC Modulators for High Data Rate Spacecraft Transponders, Phase II

Completed Technology Project

Project Introduction

Active MMIC Modulators for High Data Rate Spacecraft Transponders, Phase II
Space vehicles for deep space exploration rely on microwave and millimeter wave links for communication with earth stations. As the mission of space probes expands, the data rate to be transmitted increases, and effective, compact, methods of modulating the RF carrier with high-speed data become a critical necessity. Passive MMIC modulation approaches introduce loss into the RF path and analog phase shifters in particular can exhibit significant shortcomings such as insertion loss variations and phase-shift range limitations. For more complex digital or hybrid modulation schemes, passive modulator components may also need elaborate calibration look-up tables to achieve desired phase and amplitude modulation accuracy with respect to process and temperature variations. Hittite has recently developed high-performance, active I/Q vector modulator MMICs for communication systems operating up to C-band, based on SiGe and GaAs HBT process technologies. Our Phase I study has shown the feasability of implementing a high-performance X-band modulator on the same 40-50 GHz Ft process. We propose to fabricate and evaluate this modulator as part of this Phase II program. We also propose to use this modulator in conjunction with frequency multipliers recently developed by Hittite to implement a high-speed,linear phase modulator at Ka band. More »

Primary U.S. Work Locations and Key Partners

Project Library

Share this Project

Organizational Responsibility

Project Management

Project Duration

Light bulb

Suggest an Edit

Recommend changes and additions to this project record.

This is a historic project that was completed before the creation of TechPort on October 1, 2012. Available data has been included. This record may contain less data than currently active projects.

^