Design of Balanced Low Noise Amplifier Used for the TMA
Sai Jing-bo · 2013
The design of a sort of balanced low-noise amplifier used for TMA is presented in this paper.By using balanced technology and micro-3dB hybrid coupler,the performance of the amplifier is improved and the size of the circuit is reduced significantly.The design starts with the computing of the DC operating point and the designing of matching network,then,the PCB-layout is given.The ADS co-simulation is adopted in the circuit design,resulting in much closer to the practical circuit compared with the simulation from a schematic.Finally,the simulation shows the noise factor is lower than 1dB and the power gain is about 15dB at 800～1 000MHz operation frequency.In addition,the input and output VSWR of the amplifier are lower than 1.2.