CAJ | 학술논문

提出了一种基于低Q值匹配网络的超宽带低噪声放大器( LNA)的设计方法。该方法将LC滤波电路加入偏置电路中,以降低系统噪声同时调节匹配网络Q值；通过选择合适的反馈回路,提高LNA的带宽并调节匹配网路Q值；利用匹配电路结构及优化的Q值,解决了放大器频带窄、噪声高、增益低的问题。测试结果表明,在频段1.5 GHz~2.5 GHz内,其纹波特性低于1 dB,增益达到25 dB。将实测结果与仿真结果相比较,验证了该设计方法的合理性,与传统LNA设计方法相比,采用低Q值匹配网络的设计方法结构简单、性能优越,具有广泛的应用价值。
제출료일충기우저Q치필배망락적초관대저조성방대기( LNA)적설계방법。해방법장LC려파전로가입편치전로중,이강저계통조성동시조절필배망락Q치；통과선택합괄적반궤회로,제고LNA적대관병조절필배망로Q치；이용필배전로결구급우화적Q치,해결료방대기빈대착、조성고、증익저적문제。측시결과표명,재빈단1.5 GHz~2.5 GHz내,기문파특성저우1 dB,증익체도25 dB。장실측결과여방진결과상비교,험증료해설계방법적합이성,여전통LNA설계방법상비,채용저Q치필배망락적설계방법결구간단、성능우월,구유엄범적응용개치。
A novel LNA ( Low Noise Amplifier ) is proposed by using low Q value of matching network. The LC filtering circuit is merged in biasing circuit in order to reduce the noise of system and to monitor the Q value of the matching network in the design;By choosing the suitable feedback loop to raise the bandwidth of the LNA and to adjust the Q value of the matching network;By taking advantage of the structure of matching circuit and the optimization of the Q value,a few problems of Amplifier is settled down,such as the narrow bandwidth,the high noise and the low gain. The LNA is measured under the bandwidth of 1. 5 GHz ~2. 5 GHz, the ripple wave characteristic is lower than 1 dB,moreover the gain is 25 dB. The measured result is compared with the simulation result,it can be verified the design is reasonable. And the structure of the design method is simple and the performance is more superior,meanwhile the application is wide.