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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:
-
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
- Verified by:
- Gdańsk University of Technology
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