A 280-GHz Digitally Controlled Four Port Chip-Scale Dielectric Resonator Antenna Transmitter with DiCAD True Time Delay

Nadav Buadana*, Samuel Jameson, Eran Socher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A 280-GHz, fully integrated and digitally controlled multiport coherent radiator is presented. The silicon die acts as a chip-scale dielectric resonator antenna (CSDRA) and is excited by four differential loop inductors. The chip incorporates a balun for an X-band input signal, a 1-4 ultracompact differential Wilkinson splitter, and four × 27 active multipliers chain (AMC), which drive the four exciting elements. High-resolution, digitally controlled true time delay (TTD) elements, based on digitally controlled artificial dielectric transmission lines (DiCAD), are used to calibrate the variations between channels to optimize overall broadside radiated power and enable beam steering of ±15°. High-resolution DACs are used to accurately set the bias through a 3-wire SPI module. Fabricated in 65-nm CMOS, the 1.4× 2-mm2 chip achieves a record EIRP of +21 dBm, a TRP of +8.5 dBm, and a power density of 2.25 mW/mm2 with 0.72% total efficiency, without using any external lens, superstrate, or postprocessing.

Original languageEnglish
Article number9187850
Pages (from-to)454-457
Number of pages4
JournalIEEE Solid-State Circuits Letters
Volume3
DOIs
StatePublished - 2020

Keywords

  • CMOS
  • THz
  • dielectric resonator antenna
  • digitally controlled artificial dielectric transmission line (DiCAD)
  • frequency multiplier
  • mm-wave
  • true time delay (TTD)

Fingerprint

Dive into the research topics of 'A 280-GHz Digitally Controlled Four Port Chip-Scale Dielectric Resonator Antenna Transmitter with DiCAD True Time Delay'. Together they form a unique fingerprint.

Cite this