A hybrid reader tranceiver design for industrial internet of things

This paper presents an integrated asymmetric UHF/UWB reader transceiver in 90  nm CMOS technology for industrial enterprise IoT applications. The reader uses UHF transmitter to power up and inventory the tags. Instead of backscattering, tag replies the reader using Ultra-wideband (UWB) pulses, allowing high throughput transmission and precise positioning. Therefore, a UWB receiver is deployed in the proposed reader for data reception and Time-of-Arrival (ToA) estimation using energy detection schemes. The transmitter delivers 160  kb/s ASK modulated data by an integrated modulator and a Digital Controlled Oscillator (DCO). The DCO has 11% tuning range ability to cover different UHF signal channels. On the UWB receiver side, the 3–5  GHz energy detection receiver supports maximum 33 Mb/s data rate in both OOK and PPM modulations. The receiver front-end provides 59  dB voltage gain and 8.5  dB noise figure (NF). Measurement results shows that the receiver achieves an input sensitivity of -79 dBm at 10 Mb/s, and the power consumption of transceiver is 21.5  mW.