Integrated Dual-Channel X-Band Offset-Transmitter for Phase Steering and DDMA Arrays

Withagen, J.C.J.G.; Annema, A.J.; Nauta, B.; van Vliet, F.E.

doi:10.1109/CSICS.2016.7751048

Integrated Dual-Channel X-Band Offset-Transmitter for Phase Steering and DDMA Arrays

Title

Integrated Dual-Channel X-Band Offset-Transmitter for Phase Steering and DDMA Arrays

Author

Withagen, J.C.J.G.
Annema, A.J.
Nauta, B.
van Vliet, F.E.

Publication year

2016

Abstract

Multiple-Input and Multiple-Output (MIMO) arrays provide more degrees of freedom than conventional phased arrays. They require that every transmitting element of the array can be identified when received. One way to achieve this is to give every element its own unique frequency. Offset-transmitters may be used to introduce MIMO or Doppler Division Multiple Access (DDMA) into phased-arrays without an excessive increase in waveform-generating hardware. Our dual-channel demonstrator IC can obtain a phase accuracy better than 1 degree and an spurious level of better than -65dBc for a single on-chip channel. This work investigates at X-band the effects of the limited on-chip isolation of 35dB, when multiple offset outputs are generated on a single chip for both beam steering and DDMA. In case of beam steering, the requirements on channel-to-channel isolation are less strict, making it well within reach. In the case of DDMA, we recommend increasing the channel-to-channel isolation by implementing multiple chips, in which case independent signals can be generated. © 2016 IEEE. The IEEE Electron Devices Society

Subject

2015 Observation, Weapon & Protection Systems
RT - Radar Technology
TS - Technical Sciences
Degrees of freedom (mechanics)
Integrated circuits
Transmitters
Channel isolation
Independent signals
Multiple access
Multiple input and multiple outputs
On-chip isolation
Phase accuracy
Phase steering
Spurious levels
MIMO systems