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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Compact optical true time delay beamformer for a 2D phased array antenna using tunable dispersive elements.

Xingwei Ye, Fangzheng Zhang, Shilong Pan

|September 9, 2016

Summary

This summary is machine-generated.

A novel optical true time delay architecture enables 2D beam steering in phased array antennas. This system uses tunable dispersive elements (TDEs) for efficient azimuth and elevation control, validated experimentally.

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Area of Science:

Optoelectronics
Antenna Engineering
Photonics

Background:

Phased array antennas require precise time delay control for beam steering.
Existing methods for true time delay can be complex and bulky.
Optical approaches offer potential for high bandwidth and reduced size.

Purpose of the Study:

To propose and demonstrate a hardware-compressive optical true time delay architecture for 2D beam steering.
To utilize fiber-Bragg-grating-based tunable dispersive elements (TDEs) for beam steering control.
To validate the architecture's performance in a planar phased array antenna.

Main Methods:

A planar phased array antenna architecture employing N TDEs and M optical carriers for an M×N array.
Programming TDE settings to control time delays for both azimuth and elevation beam steering.
Experimental validation using a 2×2 array fed by a wideband pulsed signal.

Main Results:

Demonstration of delay control for a 2×2 array using the proposed optical architecture.
Experimental waveforms measured at the antennas.
Radiation patterns calculated from measured data closely matched theoretical predictions.

Conclusions:

The proposed hardware-compressive optical true time delay architecture effectively achieves 2D beam steering.
The use of TDEs provides a compact and efficient solution for beam steering control.
Experimental results confirm the validity and accuracy of the optical beam steering approach.