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Coherently distributed RF antenna arrays using photonic links
Optics Express
|September 23, 2025
Summary
Radio-frequency-over-fiber (RFoF) technology enables distributed antenna systems to maintain signal integrity over long distances. This research demonstrates creating flat holographic field profiles using optimized complex weights on antenna elements.
Area of Science:
- Optoelectronics
- Antenna Systems
- Holography
Background:
- Radio-frequency-over-fiber (RFoF) links offer low-loss transmission of radio frequency (RF) signals.
- Maintaining spatial and temporal coherence of RF signals over distance is crucial for advanced antenna systems.
- Holographic field profiles can shape RF signals in the plane of propagation.
Purpose of the Study:
- To implement a remotely distributed antenna system using RFoF links.
- To achieve "in-plane" holographic field profiles with optimized complex weights.
- To experimentally validate the system's performance and compare it with simulations.
Main Methods:
- Utilizing RF-photonic links for remote antenna distribution.
- Applying optimized complex weights to distributed antenna elements.
- Conducting a one-dimensional indoor experiment for validation.
Main Results:
- Demonstrated the preservation of spatial and temporal coherence of RF signals over long distances.
- Successfully realized "flat," in-plane holographic field profiles.
- Experimental results showed good agreement with simulation data.
Conclusions:
- RFoF technology is effective for creating high-fidelity distributed antenna systems.
- The proposed method enables the generation of in-plane holographic RF fields.
- The system shows promise for applications requiring precise RF signal shaping.
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