A study on a highly linear front-end for low/zero-IF receivers in the 5.8 GHz ISM band

In the recent few years architectures alternative to the classical super-heterodyne receivers, like Zero-IF or Low-IF, have been investigated. In this paper a possible solution to enable an high IIP2 front end and suitable for such receivers is described. The designed circuit, implemented in ADS using the OMMIC foundry GaAsEDOZAH process and operating in the 5.8 GHz ISM band, shows an IIP2 better than 50 dBm verifying the improvement of the described front end in comparison with a classical approach. Moreover a direct conversion receiver, including the mentioned solution, has been studiedin order to appreciate the main receiver parameters like BER and sensitivity.