Research On Silicon Based Reconfigurable Phase Shifter Technology For Broadband Multi-Function Receiver Chip

With the continuous development of military technology and modern communication technology,the phased array radar system has been widely used in military and civilian fields.Compared to conventional mechanical-scanning radars,it has more flexible beam-scanning capability,better anti-interference capability,easier miniaturization and integration.All these features make phased array radar system constantly developing.As the core component of phased array radar technology,the monolithic-integrated transceiver chip realized the switching of the transmit/receive path and the function of amplitude control and phase adjustment of the RF signal.Since the transmit path in monolithic integrated transceiver chips typically required larger output power level,most transmit chips use III-V compound semiconductor technology power amplifiers for higher output power.Currently,with the continuous advances in silicon technology and the further demand for monolithic integrated and low-cost receiver chips,full-integrated multi-function receiver chips based on silicon CMOS technology have gradually becoming a hot spot in the academic and industrial field.In this thesis,we focus on the circuit design of proposed phase shifters and low-noise amplifiers based on SMIC 55nm CMOS process for silicon-based wideband multifunctional receivers.The specific work is as follows:1.Through the introducing of the basic working principles of phase shifters,we have analyzed the implementation theory and circuit characteristics of passive switching phase shifters,reflection phase shifters and active vector-sum phase shifters.By discussing the pros and cons of various circuit topologies in phase shifters circuit design,the technical excellence of vector-sum phase shifters has been clarified.Through the discussion of the basic working principle and circuit architecture of the vector-sum phase shifters,the basic realization form of the circuit topology has determined,which provides a solid theoretical of the subsequent wideband reconfigurable active phase shifter.2.An ultra-wideband reconfigurable vector-sum phase shifter operating at 2-18GHz is presented.This phase shifter consists of a reconfigurable quadrature generator,an active load variable gain amplifier and a logic controlled digital-to-analog conversion circuit.By analyzing the various forms of quadrature generator design,a wideband orthogonal-generation network based on RC-RL-RC three-stage cascade structure is derived.The structure of variable gain amplifier of different forms is analyzed and elaborated which is based on active load Gilbert-cell vector synthesizer and logic control DAC circuits.Finally,simulation performance of the ultra-wideband 2-18GHz reconfigurable vector-sum phase shifter show that the phase RMS errors are less than 4°,the gain RMS errors are less than 1d B.3.A 9-18GHz low power broadband low noise amplifier（LNA）is presented.This LNA is based on the two-stage common-source current-reuse structure to achieve low power performance.The input gate-source transformer feedback structure is adopted to realize broadband input-matching and noise matching,the body-bias technology is also combined to improve the overall gain.The simulation shows 2.8-3.3d B noise figure,16-17d B gain performance and the S₁₁ is less than-10d B in 9-18GHz.Powered by 1V supply voltage,this LNA shows an overall power consumption of only 7.8m W.The chip area（including pad）is 0.71mm².