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mmW Rotman Lens-Based Sensing: An Investigation Study.
Waleed T Sethi1, Ahmed B Ibrahim2, Khaled Issa3
1Faculty of Electrical Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Swabi 23640, Pakistan.
Sensors (Basel, Switzerland)
|February 10, 2021
Summary
Researchers repurposed a Rotman lens, a device for signal routing, as a novel sensor. This innovation leverages multiple ports to enhance sensing capabilities in the millimeter wave band.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Sensor Technology
Background:
- Rotman lenses are established wideband true-time delay devices.
- Their inherent wave/signal routing capabilities make them suitable for beamforming in communication systems.
- The design features multiple input, output, and dummy ports.
Purpose of the Study:
- To explore the novel application of a Rotman lens as a sensor.
- To enhance sensing performance by utilizing information from the lens's multiple ports.
- To investigate millimeter wave sensing applications.
Main Methods:
- A Rotman lens was designed and optimized for the millimeter wave (mmW) band (27-29 GHz, central frequency 28 GHz).
- The realized lens has a compact footprint of 140 × 103 × 0.8 mm³.
- A polarity correlator was employed to characterize the material under investigation.
Main Results:
- Demonstrated the feasibility of using a Rotman lens as a sensor.
- Showcased enhanced sensing performance by leveraging multi-port data acquisition.
- Successfully operated the device in the millimeter wave spectrum.
Conclusions:
- The Rotman lens offers a unique and effective platform for sensing applications.
- Utilizing multiple ports significantly improves the information gathered for sensing.
- This novel approach opens new avenues for millimeter wave sensor development.
