Na Li, Guirong Feng, Lingling Jiao, Ping Li, Xiaowei Shi
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Generation of dual-mode PS-OAM beams using a Vivaldi antenna array
The paper proposes a single antenna that can generate dual-mode plane spiral orbital angular momentum (PS-OAM) beams. Six Vivaldi antennas placed in a tangential circular array make up the antenna, and the antenna is etched onto a substrate material and has a flat design, allowing for easy integration with other system components. The neighbouring ports of the antenna elements have phase differences, so phase-shifting in the feeding network is unnecessary. When fed with the same phase and amplitude, the antenna can produce PS-OAM beams with mode +1 at 7 GHz and mode +2 at 14 GHz, and the measured purity is 80.6% and 63%, respectively. The method may provide a new way to produce multi-mode orbital angular momentum.
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Micro & Nano Letters offers express online publication of short research papers containing the latest advances in miniature and ultraminiature structures and systems. With an average of six weeks to decision, and publication online in advance of each issue, Micro & Nano Letters offers a rapid route for the international dissemination of high quality research findings from both the micro and nano communities.
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Micro & Nano Letters offers express online publication of short research papers containing the latest advances in micro and nano-scale science, engineering and technology, with at least one dimension ranging from micrometers to nanometers. Micro & Nano Letters offers readers high-quality original research from both the micro and nano communities, and the materials and devices communities.
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