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Design of a binary programmable transmitarray based on phase change material for beam steering applications in
Samara Gharbieh1, Jorick Milbrandt2, Bruno Reig2
1Univ. Grenoble Alpes, CEA, Leti, 38000, Grenoble, France. samara.gharbieh1@gmail.com.
Scientific Reports
|February 5, 2024
Summary
This study presents a reconfigurable D-band transmitarray using novel phase change material (PCM) switches for miniaturization. The design demonstrates efficient operation and individual switch control for advanced wireless applications.
Area of Science:
- Electromagnetics and Wave Propagation
- Materials Science for RF Applications
- Antenna and Array Design
Background:
- D-band (110-170 GHz) communication demands compact and reconfigurable antenna solutions.
- Miniaturization of components is a key challenge for D-band systems.
- Phase change materials (PCM) offer tunable electromagnetic properties suitable for reconfigurable devices.
Purpose of the Study:
- To design and validate a reconfigurable transmitarray for D-band frequencies.
- To introduce novel, compact PCM switches for unit cell integration.
- To investigate the impact of individual DC biasing on transmitarray performance.
Main Methods:
- Design of a transmitarray unit cell with three metal layers and quartz substrates.
- Integration of innovative PCM-based switches for 1-bit phase shift.
- Full-wave electromagnetic simulations for unit cell and 10x10 array analysis.
- Development and testing of a command line for individual PCM switch biasing.
Main Results:
- Unit cell insertion loss below 1.5 dB over a 27% bandwidth.
- Demonstrated promising reconfiguration capabilities for the D-band transmitarray.
- Validated theoretical results against full-wave simulations.
- Investigated the influence of DC biasing on performance, noting a trade-off in 1-dB gain bandwidth.
Conclusions:
- The proposed reconfigurable D-band transmitarray with PCM switches shows encouraging performance.
- The novel individual DC biasing command line enables precise control over switch states.
- This design offers a viable solution for miniaturized and reconfigurable D-band communication systems.
