Fully-scalable 2D THz radiating array: A 42-element source in 130-nm SiGe with 80-µW total radiated power at 1.01 THz

Abstract

This paper presents a 1-THz radiating array using IHP 130-nm SiGe process. It is based on a highly-scalable 2D structure that uses a square grid of slots to simultaneously (1) maximize and synchronize the fundamental oscillation (f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> =250 GHz) and 4 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> -harmonic generation (4f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> =1 THz) of a large array of transistors, (2) synthesize standing-wave patterns with near-field cancellation at f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> , 2f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> and 3f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> and efficient radiation at 4f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> . The compact design enables implementation of 42 coherent radiators on a 1-mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> area. The chip consumes 1.1-W DC power and generates 80-μW total radiated power with 13-dBm EIRP.