A Near-Field Focused Lens Based on Multilayer Transmitarray
Near-field focused antennas are one of the most widely concerned industrialization research studies. Among these application scenarios, the microwave near-field focused lens based on transmitarray is one of the intensively designs, which usually consist of Multilayer Frequency Selective Surface (M-F...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10988845/ |
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| Summary: | Near-field focused antennas are one of the most widely concerned industrialization research studies. Among these application scenarios, the microwave near-field focused lens based on transmitarray is one of the intensively designs, which usually consist of Multilayer Frequency Selective Surface (M-FSS). In this paper, the theoretical relationship between the transmission response of a single-layer FSS and that of an M-FSS is established, taking into account the interlayer interactions. Through the derived results, a transmitted element based on four-layer FSS was swiftly identified, which could achieve a phase shift of approximately 330 degrees with a transmission magnitude of better than -1.5 dB. A 3-bit quantized near-field focused lens was subsequently designed, fabricated, and tested, whose operating frequency band is 20.5-21.7 GHz. The simulated and measured results show that the presented near-field focused lens has good electromagnetic wave convergence. And both the simulation and measurement verify the validity of the derived expression, indicating its availability for M-FSS transmitarray element design, thereby streamlining the design process. |
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| ISSN: | 2169-3536 |