| Title |
A 2.4 GHz Low Noise and Highly Linear RF Front-end for Wireless IoT Applications |
| Authors |
이수연(Suyeon Lee) ; 남일구(Ilku Nam) |
| DOI |
https://doi.org/10.5573/ieie.2021.58.2.24 |
| Abstract |
In this paper, an RF front-end for a 2.4GHz direct-conversion receiver is presented for short range wireless IoT applications. The proposed RF front-end circuit consists of a low noise amplifier and a double-balanced harmonic down-conversion mixer. The low noise amplifier and a double-balanced harmonic down-conversion mixer are connected by using an on-chip transformer to obtain high linearity. The switching stage of the double-balanced harmonic down-conversion mixer adopts a parasitic vertical bipolar junction transistor to achieve low noise characteristics. The proposed 2.4GHz RF front-end is designed using a 180nm triple well RF CMOS process and consumes 3.6mW at 1.8V supply voltage. The designed RF front-end has a conversion gain of 35dB, an IIP3 of ?9dBm, and a DSB noise figure of 4 dB. |