Development of a double-octave (7-34 GHz), highly linear single balanced resistive HEMT mixer using device linearization techniques

We present the design and development of a highly linear, wide bandwidth single balanced resistive mixer (SBRM). We propose a linearization technique that combines the optimum drain bias condition and multiple gated transistors for resistive mixers. The experimental results demonstrate that the prototype mixer has a conversion loss of less than 11 dB, third-order input intercept point (IIP3) range of 27-33 dBm at 15 dBm LO drive, and a high port-to-port isolation of over 40 dB from 7 to 34GHz. To the best of our knowledge, this mixer has the highest linearity over a 27GHz bandwidth ever reported.