| Autor: |
Fabiani, Bernardo M., Sakomura, Eduardo S., Gripp, Tarcisio A. B., Nascimento, Daniel C. |
| Předmět: |
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| Zdroj: |
Journal of Microwaves, Optoelectronics & Electromagnetic Applications; Jun2019, Vol. 18 Issue 2, p286-292, 7p |
| Abstrakt: |
The difference between phase velocities of the odd and even modes in inhomogeneous microstrip coupled lines makes the microstrip directional coupler a poor device regarding directivity. In this work, this issue is successfully compensated by the addition of a matching network at the ports of coupled lines. Furthermore, the proposed matching network, composed of a single segment of microstrip line, was extensively studied providing significant insights for the design of a compact and broadband device. As result, simple design equations based on coupled lines S-parameters are obtained, as well as the achievable operation limits of the proposed matching network. Finally, in order to validate the proposed design methodology, a compact microstrip directional coupler is constructed to operate with directivity higher than 30 dB and coupling of 17 dB over a 600-MHz bandwidth. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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