Design of the high-performance radio frequency receiver for IEEE 802.11ac system
This paper presents the design of RF receiver operating in 5.0GHz to 6.0GHz band for high throughput IEEE 802.11ac system. A double-conversion super-heterodyne architecture with IF of 1.05GHz is employed and the maximum bandwidth is 80MHz. Measurement results show that the receiver has excellent performance. The noise figure is about 4.6dB and the gain flatness over any 80MHz bandwidth is less than 1.8dB. In addition, it achieves a wide dynamic range from -80dBm to 5dBm. For 80MHz 256-QAM 802.11ac signal, the EVMs at 5.15GHz, 5.45GHz and 5.85GHz are 1.02%, 0.86% and 0.86% respectively.