A 1-4GHz 4-element phased array receiver frontend demonstrates spatial interferer rejection using null steering. Element phase and amplitude control are performed by a switchedcapacitor vector modulator with integrated downconversion, utilizing a rational sine/cosine approximation. The 65nm CMOS receiver achieves more than 20dB of spatial interferer rejection up to an angular separation of 15°.
|Number of pages||10|
|Journal||IEEE journal of solid-state circuits|
|Publication status||Published - 1 Dec 2011|
- Phased arrays
- interference nulling
- vector modulator
- spatial filtering