| Title |
A Dual-band Balanced Amplifier Using Meta-material Transmission Line |
| Authors |
임종식(Lim, Jong-Sik) ; 이재훈(Lee, Jae-Hoon) ; 이준(Lee, Jun) ; 전역환(Jeon, Yuck-Hwan) ; 정용채(Jeong, Yong-Chae) ; 한상민(Han, Sang-Min) ; 안달(Ahn, Dal) |
| DOI |
https://doi.org/10.5370/KIEE.2011.60.12.2305 |
| Keywords |
Dual band amplifier ; Meta-material ; Left handed transmission line |
| Abstract |
This paper describes a design of dual band balanced amplifier using a lefted handed meta-material transmission line structure for high frequency application. Meta-material transmission lines have been known to have dual band frequency responses. A dual band branch line hybrid coupler is designed using the meta-material transmission lines, and measured at first. Two identical dual band amplifiers are also designed, built and tested using the same meta-material transmission structure. The proposed dual band balanced amplifier is composed of those dual band branch line hybrid coupler and amplifiers. In order to suggest an design example, a prototype of dual band balanced amplifier is built and measured at the dual frequencies, 1800MHz(f_1) and 2300MHz(f_2). The simulation and measurement show that the fabricated balanced amplifier operates well at the desired dual frequencies bands with the gain of 11.12dB and 17.67dB at f_1 and f_2, respectively, with a good agreement with the simulation results. |