Reconfigurable blocker-resilient receiver with concurrent dual-band carrier aggregation

A reconfigurable software-defined radio receiver supporting dual-band carrier aggregation is demonstrated in a 65nm LP CMOS technology. A front-end filter, leveraging both the input impedance and voltage transfer functions of an N-path filter, can be configured either as a parallel bandpass or a series notch filter. The dual-band carrier aggregation is achieved by combing a conventional N-path filter with complex signal processing at baseband. The center frequencies of the desired two RF bands can be separated anywhere between 0 to +100 MHz within 0.1 to 1 GHz. The front-end notch filter configuration improves the blocker tolerance by 15 dB compared to the bandpass filter configuration at the expense of noise figure increase by 2 to 3.5 dB.