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Dot-Shaped Range-Angle Beampattern Synthesis for Frequency Diverse Array With Linear Frequency Offset
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DOI：10.1109/lawp.2026.3692774.png)
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Abstract
En 中文
Frequency diverse array (FDA) suffers from inherent range–angle coupling, which causes ambiguous target localization and dispersed far-field energy. Existing decoupling approaches rely on nonuniform frequency offsets that are difficult to implement in hardware. In contrast, this letter introduces a feed-to-element random remapping architecture. The method randomly routes readily available linearly incremental frequency offset signals to individual array elements. This random routing strategy shifts the key implementation challenge from signal generation to signal routing. Because the routing function can be realized with mature, low-cost switch matrix technology, the overall system complexity is substantially reduced. The architecture is validated by applying it to measured five-channel data originally acquired from a photonics-based FDA system, confirming dot-shaped range-angle beampattern synthesis under realistic hardware conditions. The approach requires only the addition of a switch matrix to existing linearly incremental frequency offset sources, offering a practical pathway toward engineering implementation of dot-shaped range-angle beampattern synthesis.
Keywords:
Dot-shaped range-angle beampattern
frequency diverse array (FDA)
linear frequency offset
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