Jian Xu

Southeast University (China), Nan-ching-hsü, Jiangxi Sheng, China

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Publications (2)0 Total impact

  • Jian Xu · Gong-Zhi Wang · Ying Zhang
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    ABSTRACT: The characteristic impedance of L-type and T-type networks are investigated for the distributed amplifier (DA) design respectively. The analysis shows that the L-type network has better frequency characteristics than the T-type one. Two distributed amplifiers with L- and T-type network are designed with 2-μm GaAs HBT process for comparison. The simulation results demonstrate that the DA with L-type network has broader 3-dB bandwidth than that of the DA with T-type network.
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    ABSTRACT: A 50MHz-1GHz low noise and high linearity amplifier monolithic-microwave integrated-circuit (MMIC) is presented in this article. The circuit was designed with 0.15um InGaAs PHEMT process. The ADS simulation results showed it gave excellent Noise Figure of 1.36dB and high linearity up to 17dBm IIP3 with 75Ohm systems. It is especially suitable in the applications such as cellular telephone base station driver amplifiers. the Cable TV etc.