Low noise amplifier using electromagnetic simulator at U-NII frequency band

In this paper, the purposed method of low noise amplifier (LNA) has considered choke, dc block, and matching networks with a microstrip transmission line which are analysed by the EM simulator. The ATF36077 pHEMT device is applied to design LNA for U-NII frequency band (5 GHz-6 GHz). The matching networks have designed by the only open ended stub in order to reduce parasitic effects is generated from a via structure. Through EM simulator, the simulation result shows that the linear gain (@5.5 GHz) is an over 10 dB, input/output return loss (@5.5 GHz) are a below -10 dB and the 3rd order intercept point is about 17 dBm.