| Title |
Design of LNA and Mixer for Ku-band Receiver |
| Authors |
최혁재(Choi, Hyuk-Jae) ; 고재형(Ko, Jae-Hyeong) ; 김군태(Kim, Koon-Tae) ; 이제광(Lee, Je-Kwang) ; 김형석(Kim, Hyeong-Seok) |
| DOI |
https://doi.org/10.5370/KIEE.2012.61.2.257 |
| Keywords |
Low noise amplifier ; 18GHz ; Noise matching ; Gain matching ; Diode mixer ; Coupler |
| Abstract |
The Ministry of Information-Communication assigned 18~19GHz frequency band for communication of cabins and platform to link between subway/train and it's station. In this paper, we propose wireless transmission devices which are 2 stage hybrid low noise amplifier of 18GHz band and mixer for 18GHz as well to apply for RF receiver. We designed LNA to be noise matched its 1st stage and gain matched for 2nd stage and mixer using 180° hybrid coupler to suppress the spurious signal. The transistors of 18 GHz LNA and mixer are NE3210S01 of NEC and KMB-N51-1, respectively. As the result of simulation, we get 19.92dB gain and 2.06dB noise figure with LNA and 8.61dB conversion loss with mixer. |