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Updated: Sep 13, 2025
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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
Published on: April 1, 2020
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RCS control method for phased array based on scattering mode cancellation network.
Optics Express
|July 30, 2025
Summary
A novel method precisely controls radar cross-section (RCS) in phased arrays by canceling scattering modes. This technique optimizes scattering patterns while maintaining essential radiation performance, validated experimentally.
Area of Science:
- Electromagnetics and Antennas
- Metamaterials and Applied Electromagnetics
Background:
- Phased arrays are crucial in modern radar and communication systems.
- Controlling the radar cross-section (RCS) is vital for stealth applications and reducing interference.
- Existing methods often compromise radiation efficiency or lack precise scattering control.
Purpose of the Study:
- To propose a novel RCS control method for phased arrays based on a scattering mode cancellation network.
- To achieve precise scattering regulation while preserving the array's radiation performance.
- To enable arbitrary scattering pattern optimization and rapid RCS prediction.
Main Methods:
- Derivation of analytical relationships between load resistance, phase delay, antenna mode scattering field (AMSF), and structural mode scattering field (SMSF).
- Rapid prediction of AMSF using derived formulas, avoiding computationally expensive full-wave simulations.
- Synthesis of the total scattering field by combining SMSF and modulated AMSF for precise scattering cancellation.
- Design of an impedance matching network to ensure port matching and maintain radiation performance.
Main Results:
- The proposed method precisely controls the RCS to target values at specific incidence angles or angular domains.
- Demonstrated significant RCS reduction: -60 dBsm at normal incidence, -50 dBsm at oblique incidence.
- Achieved RCS below -40 dBsm across the entire angular domain for an 8-element linear array.
- Experimental validation confirmed numerical results, showing preserved radiation performance.
Conclusions:
- The scattering mode cancellation network offers an effective approach for precise RCS control in phased arrays.
- The method successfully balances scattering reduction with the preservation of radiation characteristics.
- Validated through fabrication and experimentation, the technique shows practical applicability for stealth and interference management.
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