# ISISPACE VHF/UHF Antenna for 1U-3U
*component . products*

ISISPACE's VHF/UHF antenna for 1U-3U CubeSats is a deployable antenna subsystem with monopole, dipole, turnstile, and hybrid configuration options.

## Specifications
- **manufacturer**: isispace
- **deployment context**: orbital
- **entity type**: component
- **last verified date**: 2026-05-28
- **verified by**: operator
- **claim status**: unclaimed
- **subtype**: comms-ttc
- **provider**: isispace
- **attributes**: {"kind":"component","product_status":null,"manufacturer":"isispace","description":"ISISPACE's VHF/UHF antenna for 1U-3U CubeSats is a deployable antenna subsystem with monopole, dipole, turnstile, and hybrid configuration options.","sensor":null,"bus":null,"ground_segment":null,"launcher":null,"analysis_service":null,"deployment_context":"orbital"}

## Editorial
The ISISPACE VHF/UHF Antenna for 1U-3U (Antenna Subsystem 1, ANTS1) is a deployable antenna subsystem designed for VHF/UHF communications on 1U to 3U CubeSat missions.[^vhf-uhf-antenna-1u-3u-page] The design traces to the Delfi-C3 satellite and has been flight proven since July 2010, with over 500 units delivered and launched as of the product page.[^vhf-uhf-antenna-1u-3u-page]

The subsystem deploys up to four 55 cm tape-spring antennas and supports monopole, dipole, turnstile, and hybrid configurations, with a redundant deployment mechanism completing in under 5 seconds.[^vhf-uhf-antenna-1u-3u-page] The board layout includes a large central cutout and miniature RF connectors, allowing the top face to accommodate solar panels, patch antennas, and sensors alongside the antenna.[^vhf-uhf-antenna-1u-3u-page]

The unit operates across 145-868 MHz and handles up to 2 W RF power, with a UHF bandwidth exceeding 50 MHz and a VHF bandwidth exceeding 10 MHz, both measured at -10 dB return loss.[^vhf-uhf-antenna-1u-3u-page] Boresight gain is 0 dBi on both bands.[^vhf-uhf-antenna-1u-3u-page] The electrical interface uses a miniature 9-pin OMNETICS connector with I2C data communications, and the unit is available in 3.3 V and 5 V variants, drawing less than 40 mW and 60 mW respectively at nominal power, with 2 W at deployment.[^vhf-uhf-antenna-1u-3u-page]

The stowed envelope is 98 x 98 x 7 mm including the supplied aluminium cover plate, with a mass below 90 g.[^vhf-uhf-antenna-1u-3u-page] Operating temperature range is -20 to +60 deg C, with a deployment temperature range of -5 to +60 deg C.[^vhf-uhf-antenna-1u-3u-page]

## Sources
- [vhf-uhf-antenna-1u-3u-page] | ISISPACE VHF/UHF Antenna for 1U-3U product page | https://www.isispace.nl/product/vhf-uhf-antenna-for-1u-3u/ | tier=operator-marketing | accessed=2026-05-28

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Source: https://eo-atlas.org/products/component/isispace-vhf-uhf-antenna-1u-3u
Maintainer: SpectraWorks B.V. (CC-BY 4.0)