Ph.D. Dissertation Defense: Jooik Chung

Friday, April 9, 2021
10:00 a.m.
Maria Hoo
301 405 3681

ANNOUNCEMENT:  Remote PhD Dissertation Defense

Name: Jooik Chung


Professor Agis Iliadis (Chair)

Professor Kevin Daniels

Professor Robert Newcomb

Professor Alireza Khaligh

Professor Aris Christou, Dean's Representative

Date/time: Friday, April 9 2021 at 10:00 AM


Location: Zoom Meeting meeting link:  


Title: A Novel IC CMOS Sensor for Remote RF Signal Sensing



This dissertation explores the development of an RF sensor IC chip capable of tracking the directionality of RF remote emissions. The IC design uses an angle-of-arrival algorithm, and it is designed for the 180 nm CMOS technology, and also applicable to other technologies. The sensor chip requires two pairs of antennas aligned and placed at distance for detection of azimuthal and polar angles of the RF incident wave. The circuit consists of custom designed low-noise amplifiers (LNAs) at the front-end, with a novel design of double-balanced Gilbert cell mixers (GCMs). This amplifies and mixes the signals from the antennas and converts the phase difference  into an equivalent output voltage map suitable for an 18-bit analog-to-digital converter. Systematic optimization techniques were developed to maximize the third-order intercept point, and suppress flicker noise for the LNAs and GCMs, resulting in improved sensing accuracy. The overall system-level evaluation results showed state-of-art angle-of-arrival sensing capability with an upper limit error of 3.447°.

Audience: Graduate  Faculty 

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