{
  "abstract": "Microwave SQUID multiplexing ($μ$MUX) is a widely used readout technique for large-scale transition-edge sensor (TES) arrays. It uses radio-frequency (RF) probe tones to interrogate cryogenic resonators, requiring frequency conversion between the baseband electronics and the cryogenic RF signal chain. This work describes the RF Board, a room-temperature frequency-conversion board deployed in the AliCPT $μ$MUX readout system. The board up-converts 0-4 GHz baseband I/Q signals to the 4-8 GHz RF band for injection into the cryogenic chain and down-converts returned RF signals to baseband I/Q for ADC digitization. For the current 1000-tone operation, with a DAC output tone power of -30 dBm/tone, the required power windows are -35 to -25 dBm/tone for the RF tones transmitted to the cryostat and -45 to -35 dBm/tone at the ADC input for the returned tones. The RF Board is characterized using swept single-tone measurements covering up-conversion, down-conversion, and RF loopback. Based on these measurements, the RF output power is calculated to be -31.06 to -25.53 dBm, satisfying the RF output window. Assuming a representative cryogenic-chain transmission of -40 dB, the loopback result gives an estimated returned power of -45 to -35 dBm, within the target range. These results show that the RF Board meets the wideband frequency-conversion and tone-power requirements for the $μ$MUX readout system.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.28901",
  "author_total": 4,
  "authors": [
    {
      "name": "Junbo Wang"
    },
    {
      "name": "Jianing Dong"
    },
    {
      "name": "Zhekai Cheng"
    },
    {
      "name": "Xiangxiang Ren"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/11b2ayzxbjcga.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.28901",
  "fulltext_url": null,
  "id": "11b2ayzxbjcga",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.28901",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.IM"
    ],
    [
      "arxiv",
      "physics.ins-det"
    ],
    [
      "openalex",
      "3103|Superconducting and THz Device Technology"
    ]
  ],
  "openalex": "W7166739918",
  "pdf_url": "https://arxiv.org/pdf/2606.28901",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/11b2ayzxbjcga.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2606.28901",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.28901"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.ins-det",
      "subfield": "applied-instrumentation"
    }
  ],
  "title": "Characterization of the RF Board for microwave SQUID multiplexing readout electronics",
  "title_text": "Characterization of the RF Board for microwave SQUID multiplexing readout electronics",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/11b2ayzxbjcga",
  "venue": "arXiv",
  "versions": []
}