Metrics and Scaling Principles for Energy Synchronous Direct Antenna Modulation Transmitters

This research is sponsored in part by the National Science Foundation, and is being done in collaboration with North Carolina State University (NCSU).

This research utilizes strategies for energy-synchronous direct antenna modulation (DAM) to improve the effective bandwidth-efficiency product of small transmit systems. Metrics are studied to compare non-LTI DAM methods to fundamental bounds on LTI systems. Device- and system-level efficiency measures, scaling, and optimizing are considered. An FPGA-based DAM prototype is developed that does not depend on complex lab instrumentation. Analytic methods and over-the-air measurements are used to test and evaluate this research, which is sponsored by the National Science Foundation in collaboration with NC State.


Principle Investigators

Jacob James Adams
Brian Allan Floyd
Subhashish Bhattacharya

More Details

The proposed research focuses on utilizing strategies for energy-synchronous direct antenna modulation (DAM) to both realize and quantify gains in the effective bandwidth-efficiency product of electrically small transmit systems. This work includes several aspects of the design and analysis of direct antenna modulation systems, including the study of metrics for comparing non-LTI DAM methods against fundamental bounds on LTI systems, considering device- and system-level efficiency measures, scaling and optimizing preliminary “proof-of-concept” DAM architectures to increase performance gains, development of an FPGA-based DAM prototype that does not rely on complex lab instrumentation to operate, and test and evaluation spanning analytic methods to over-the-air measurements.