H-Band 4-Array Frequency-Locked Oscillator ICs Packaged in an Oversized Waveguide Channel

Koh yunkyeong; Moonil Kim

doi:10.23075/jicas.2025.11.2.001

Koh yunkyeong Korea University
Moonil Kim Korea University

DOI: https://doi.org/10.23075/jicas.2025.11.2.001

Keywords: millimeter-wave oscillator, waveguide packaging, spatial-power-combining (SPC)

Abstract

This paper presents the design and analysis of a 4-array oscillator module based on InP 250 nm HBT technology, with a focus on spatial power combining. Four identical oscillator ICs were integrated into a 1720 µm extended waveguide, and individual biasing was applied to achieve frequency locking at 262.7 GHz. While locking was successful, power combining through the binary channel could not be achieved due to phase mismatches between oscillator elements. Radiation pattern measurements confirmed out-of-phase locking, and the Total Radiated Power (TRP) reached 6.1 dBm, representing a 6.1 dB increase over a single module. These results highlight both the potential and the challenges of spatial power combining for high-frequency oscillator arrays.

Author Biographies

Koh yunkyeong, Korea University

Yunkyeong Koh is currently a graduate student in electrical engineering at Korea University. Her research interests are the design and measurements of terahertz integrated circuits that include power amplifiers and oscillators. She is also conducting research on power combining through the array packaging of terahertz active circuits.

Moonil Kim, Korea University

Moonil Kim is a currently professor in Electrical Engineering, at Korea University. His current research interests include the development of both passive and active circuit components required in construction of terahertz communication and imaging systems.

Homepage : http://thomas.korea.ac.kr/

H-Band 4-Array Frequency-Locked Oscillator ICs Packaged in an Oversized Waveguide Channel

Abstract

Author Biographies

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