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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Continuously variable long microwave-photonic delay of arbitrary frequency-chirped signals
Ofir Klinger1, Yonatan Stern, Fabian Pederiva
1Faculty of Engineering, Bar-Ilan University, Ramat-Gan 52900, Israel.
Optics Letters
|October 3, 2012
Summary
A new method enables precise, adjustable microwave-photonic delay for chirped waveforms. This technique is crucial for advanced applications like beam steering in large phased-array antennas.
Area of Science:
- Microwave Photonics
- Signal Processing
- Antenna Technology
Background:
- Accurate control of signal delay is essential for modern communication systems.
- Phased-array antennas require precise timing for beam steering.
- Existing methods for long microwave-photonic delay have limitations.
Purpose of the Study:
- To propose and demonstrate a generic method for continuously variable, long microwave-photonic delay.
- To enable precise delay control for arbitrarily chirped waveforms.
- To provide a solution applicable to large phased-array antenna systems.
Main Methods:
- Utilizing the specific phase-time relationships of nonlinear-frequency-modulated waveforms.
- Demonstrating the delay of 500 MHz bandwidth waveforms by tens of nanoseconds.
- Developing a principle applicable to chirped pulses of various durations, frequencies, and bandwidths.
Main Results:
- Successful demonstration of a generic method for long microwave-photonic delay.
- Achieved continuously variable delay for impulse responses of chirped waveforms.
- Validated the applicability to waveforms with 500 MHz bandwidth and delays in the tens of nanoseconds.
Conclusions:
- The proposed method offers a versatile approach for microwave-photonic delay.
- This technique is suitable for beam steering in large phased-array antennas.
- The principle is broadly applicable to various chirped pulse characteristics.
