Compact Substrate-Integrated 4 × 8 Butler Matrix with Sidelobe Suppression for Millimeter-Wave Multibeam Application
- Publication Type:
- Journal Article
- Citation:
- IEEE Antennas and Wireless Propagation Letters, 2018, 17 (5), pp. 928 - 932
- Issue Date:
- 2018-05-01
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| 08334569.pdf | Published Version | 1.33 MB |
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© 2002-2011 IEEE. This letter presents a compact dual-layer 4 × 8 Butler matrix (BM) with sidelobe level (SLL) suppression in substrate-integrated waveguide (SIW) technology. Addressing the excessive crossovers in the classic 4 × 8 BM, a novel dual-layer configuration is proposed here. Such a configuration can help reduce the required crossovers from original five sets to merely one set. Therefore, the 4 × 8 BM can be significantly simplified to achieve better compactness. Based on this configuration, a SIW dual-layer 4 × 8 BM is designed with a dimension of 6.1 λ × 4.1 λ. To evaluate its SLL suppression effect, a multibeam array fed by the proposed BM is designed, simulated, and measured.
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