A tunable millimeter-wave phase shifter driven by dielectric elastomer actuators

O. A. Araromi; P. Romano; S. Rosset; J. Perruisseau-Carrier; H. R. Shea

doi:10.1117/12.2044589

8 March 2014 A tunable millimeter-wave phase shifter driven by dielectric elastomer actuators

O. A. Araromi, P. Romano, S. Rosset, J. Perruisseau-Carrier, H. R. Shea

Proceedings Volume 9056, Electroactive Polymer Actuators and Devices (EAPAD) 2014; 90562M (2014) https://doi.org/10.1117/12.2044589
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

We present the successful operation of the first dielectric elastomer actuator (DEA) driven tunable millimeter-wave phase shifter. The development of dynamically reconfigurable microwave/millimeter-wave (MW/MMW) antenna devices is becoming a prime need in the field of telecommunications and sensing. The real time updating of antenna characteristics such as coverage or operation frequency is particularly desired. However, in many circumstances currently available technologies suffer from high EM losses, increased complexity and cost. Conversely, reconfigurable devices based on DEAs offer low complexity, low electromagnetic (EM) losses and analogue operation. Our tunable phase shifter consists of metallic strips suspended a fixed distance above a coplanar waveguide (CPW) by planar DEAs. The planar actuators displace the metallic strips (10 mm in length) in-plane by 500 μm, modifying the EM field distribution, resulting in the desired phase shift. The demanding spacing (50 ±5 μm between CPW and metallic strips) and parallel alignment criteria required for optimal device operation are successfully met in our device design and validated using bespoke methods. Our current device, approximately 60 mm x 60 mm in planar dimensions, meets the displacement requirements and we observe a considerable phase shift (~95° at 25 GHz) closely matching numerical simulations. Moreover, our device achieves state of the art performance in terms of phase shift per EM loss ~235°/dB (35 GHz), significantly out performing other phase shifter technologies, such as MMIC phase shifters.

Citation Download Citation

O. A. Araromi, P. Romano, S. Rosset, J. Perruisseau-Carrier, and H. R. Shea "A tunable millimeter-wave phase shifter driven by dielectric elastomer actuators", Proc. SPIE 9056, Electroactive Polymer Actuators and Devices (EAPAD) 2014, 90562M (8 March 2014); https://doi.org/10.1117/12.2044589

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