Dual-Band Coupled-Line Couplers With Wide Separation Between Bands
| Autor: | Yi-Chyun Chiang, Kuo-Sheng Chin, Chih-Chun Chang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Coupling
Physics Radiation Fabrication business.industry 020208 electrical & electronic engineering Bandwidth (signal processing) 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics Compact space 0202 electrical engineering electronic engineering information engineering Electronic engineering Strong coupling Optoelectronics Multi-band device Electrical and Electronic Engineering business Electrical impedance Band ratio |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 65:2918-2929 |
| ISSN: | 1557-9670 0018-9480 |
| DOI: | 10.1109/tmtt.2017.2693153 |
| Popis: | In this paper, we developed three designs of dual-band coupled-line couplers with wide separation between bands. Coupler A was constructed using three cascaded coupled-line sections with a band ratio $f_{H}/f_{L}$ of up to 7. Coupler B, with a stub-tapped coupled line, was developed for compactness and has advantages of high band ratio and controllable bandwidth. Couplers A and B are most suited for weak coupling applications. Coupler C was developed for achieving strong coupling while maintaining a high band ratio, and it was constructed using a coupled-line section connected by two uncoupled lines at its two ends. Coupler C has advantages of high band ratio, strong forward-wave coupling, compact size, and easy fabrication. Coupler A, operating at 0.84 and 5.17 GHz with $f_{H}/f_{L} = 6.15$ / and a coupling of −10 dB, and Couplers B and C, operating at 0.7 and 2.6 GHz with $f_{H}/f_{L} = 3.71$ and couplings of −11 and −3 dB, respectively, were fabricated for demonstration. The measured results validate their superior dual-band performance. |
| Databáze: | OpenAIRE |
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