The paper aims at designing of two stage cascaded ultra-wideband (UWB)
low noise amplifier (LNA) by using negative image amplifier technique. The
objective of this article is to show the performance improvement using
negative image amplifier technique and realization of negative valued
lumped elements into microstrip line geometry. The innovative technique to
realize the negative lumped elements are carried out by using Richard’s
Transformation and transmission line calculation. The AWR microwave
office tool is used to obtain characteristics of UWB LNA design with hybrid
microwave integrated circuit (HMIC) technology. The 2-stage cascaded LNA
design using negative image amplifier technique achieves average gain of
23dB gain and low noise figure of less than 2dB with return loss less than -
8dB for UWB 3-10GHz. The Proper bias circuit is extracted using DC
characteristics of transistor at biasing point 2V, 20mA and discussed in detail
with LNA layout. The negative image matching technique is applied for both
input and output matching network. This work will be useful for all low
power UWB wireless receiver applications.

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