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University College London researchers reported an experimental wireless transmission rate of 938 gigabits per second (Gb/s), using signals across a combined 5–150 GHz frequency span. The 2024 result is a laboratory demonstration aimed at high-capacity network backhaul—not a speed available to phones or ordinary 5G customers.
What the 938 Gb/s result actually measures
The 2024 paper by Zichuan Zhou and coauthors reports an over-the-air orthogonal frequency-division multiplexing (OFDM) transmission spanning 5–150 GHz. The authors describe the occupied transmission bandwidth as 145 GHz and report a data rate of 938 Gb/s. These figures describe a combined, ultra-wide experimental transmission across multiple frequency bands; they do not describe one conventional channel or an operational mobile service. The paper’s abstract in the Journal of Lightwave Technology gives the measurement context.
In the reported system, OFDM with bit loading was used to carry data across the bands. The abstract reports gaps of less than 300 MHz between different radio-frequency and millimeter-wave bands. The 938 Gb/s figure is the transmission data rate reported by the study, not an independently verified statement that this remains the fastest wireless experiment today.
How the hybrid signal generation works
The experiment combines electronic signal generation with photonic-assisted generation to cover a span that is difficult to handle with a single signal-generation approach. The paper specifies digital-to-analog converters for signals from 5 to 75 GHz, and photonic-assisted generation for signals in the W-band and D-band at higher millimeter-wave frequencies. In practical terms, electronics serve the lower portion of the frequency range while light-based techniques help generate signals at the higher end. The technical paper is the primary source for those details.
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Why the researchers are targeting network backhaul
The paper frames high-capacity point-to-point links between base stations as an application. Such links can carry traffic through network infrastructure where a site cannot be connected directly to optical fiber. This is backhaul: a connection within the network, rather than the wireless access link between a cell tower and a customer’s handset. The study therefore explores a way to move large amounts of data between infrastructure sites, not a new phone-to-network speed tier. The paper identifies this backhaul context.
What the result does—and does not—mean for users
| Question | What the study establishes |
|---|---|
| Can a phone download at 938 Gb/s? | No. The paper reports an experimental multiband transmission, not a handset speed test or consumer service. |
| Does this mean current 5G networks deliver that rate? | No. The reported result is not a measurement of an operational 5G network. |
| Is it a deployed backhaul link? | The paper reports an experiment and motivates point-to-point backhaul; deployment performance is not established. |
| Is 938 Gb/s still the latest wireless record? | That is not established by the available sources. “Record” describes the framing of the October 2024 report, not a verified current ranking. |
The paper and its related report do not establish real-world range, outdoor or mobile performance, regulatory authorization across the full frequency span, or commercial availability. Those points remain unconfirmed by these sources; their absence is not proof that deployment is impossible.
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Who reported the figure
The reported 938 Gb/s result is attributed to University College London researchers Zichuan Zhou, Amany Kassem, James Seddon, Eric Sillekens, Izzat Darwazeh, Polina Bayvel, and Zhixin Liu in their 2024 paper. A secondary report also discusses the work, but the journal paper is the source for the transmission method and measurement details. UCL’s October 2024 report provides the contemporaneous institutional coverage.
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