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Abstract
In this letter, a miniaturized hybrid dual-band branch-line coupler (BLC) with enhanced fractional bandwidths is proposed. Compact size and bandwidth enhancement are obtained using meandered transmission line sections with broken symmetry between cross-coupling branches. The circuit is designed at a low numerical cost using surrogate-assisted techniques. The optimized design features small size of only 0.25λg×0.19λg(28% miniaturization with respect to conventional single-band structure), as well as fractional bandwidths of 16% and 9% for 2.5 GHz and5.4 GHz center frequencies, respectively. The proposed structure is compared against state-of-the-art dual-band couplers and validated experimentally.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
no. 61,
pages 1441 - 1444,
ISSN: 0895-2477 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Bekasiewicz A.: Miniaturized dual‐band branch‐line coupler with enhanced bandwidth// MICROWAVE AND OPTICAL TECHNOLOGY LETTERS -Vol. 61,iss. 6 (2019), s.1441-1444
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/mop.31849
- Bibliography: test
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- Bekasiewicz, A., Koziel, S.: 'Miniaturised dual-band branch-line coupler', Electronics Lett., 2015, 51, (10), pp. 769-771. open in new tab
- Gai, C., Jiao, Y., Zhao, Y., 'Compact dual-band branch-line coupler with dual transmission lines', IEEE Microwave Wireless Comp. Lett., 2016, 26, (5), pp. 325-327. open in new tab
- Koziel, S., Cheng, Q.S., Bandler, J.W.: 'Space mapping', IEEE Microwave Mag., 2008, 9, (6), pp. 105-122. open in new tab
- Conn, A., Gould, N.I.M., Toint, P.L.: 'Trust-region methods' (MPS-SIAM Series on Optimization, Philadelphia, USA, 2000) open in new tab
- Verified by:
- Gdańsk University of Technology
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