The design of 2-stage low noise amplifier (LNA) working at S-band frequency is proposed by using non simultaneous-conjugate-match technique. Implementation of the technique is motivated by the circumstance that the gain of LNA designed by the familiar technique, i.e. simultaneous-conjugate-match is almost followed by arise of values in noise figure (NF) and voltage standing wave ratio (VSWR). In the design process, the ADS software is applied to determine the desired trade-off value between LNA parameters such as gain and VSWR. The 2-stage LNA which is deployed on an Arlon DiClad527 applies BJT transistors of BFP420. To achieve the impedance matching condition, microstrip lines are employed at the input and output ports. From the experimental characterization, it shows that the prototype of 2-stage LNA produces the gain of 24.32 dB at 3 GHz which is 4.56 dB lower than the simulated result.