This paper presents the design and testing of a millimeter-wave frequency comb generator developed for the Black Hole Explorer (BHEX) mission, a space Very-Long-Baseline Interferometry (VLBI) mission concept. The heart of BHEX is a dual-band receiver, centered at 90 and 270 GHz. This novel comb generator is based on a microwave phase modulator producing phase-coherent comb signals with multi-octave bandwidth, which will be used to track instrumental delays when injected into the receiver system. The comb generator was tested with astronomical receivers, which confirms its expected operation.
Cite
@article{arxiv.2511.22161,
title = {A Novel Comb Generator for Frequency Phase Transfer},
author = {Gabriella Montano and Cheukyu Edward Tong and Dan Marrone},
journal= {arXiv preprint arXiv:2511.22161},
year = {2025}
}