Key highlights

EnduroSat’s X-Band Single Patch Antenna is a compact, low-mass radiator for CubeSat and SmallSat high-rate downlink. At just 2.2 g and a 24 x 24 mm footprint only 5.62 mm thick, it integrates easily on almost any face of a satellite structure or alongside other surface-mounted hardware, while delivering more than 6 dBi of gain across the 8025–8400 MHz X-band.

The antenna is available in right-hand or left-hand circular polarization and accepts an RF connector for direct transmitter integration. It handles up to 4 W of RF input over a wide −40 to +125 °C range and has achieved flight heritage. Each unit is qualified for a 5-year mission lifetime under ESA ECSS-E-ST-10-03C and NASA GEVS GSFC-STD-7000A, covering random and sinusoidal vibration, shock, and thermal cycling, and is assembled in a Class 7 ISO 14644 cleanroom.

Applications

Payload data downlink for CubeSats and SmallSats
Missions needing a minimal-mass, low-profile X-band antenna
Surface integration alongside other satellite hardware where space is constrained
LEO missions requiring a flight-proven circularly polarized X-band antenna

Key features

Configuration:
Single patch
Gain:
>6 dBi over operating bandwidth
Half-power beam width:
74°
Frequency range:
8025–8400 MHz
Polarization:
RHCP or LHCP (choice of rotation direction)
RF connector:
SMP
RF power handling:
up to 4 W
Mounting:
X/Y or Z
Operating temperature:
−40 °C to +125 °C
Mass:
2.2 g
Dimensions:
24 × 24 × 5.62 mm
Flight heritage:
Yes — flight-proven
Qualification:
ESA ECSS-E-ST-10-03C and NASA GEVS GSFC-STD-7000A; 5-year mission lifetime

Flight heritage

The Endurosat X-Band Patch Antenna has achieved flight heritage.

Testing & qualification

A full campaign of tests at qualification level has been performed on a qualification engineering model: qualification tests, level and duration tests were performed following the ESA standard ECSS-E-ST-10-03C and GEVS standard GSFC-STD-7000A. Tests include: random vibration, sinusoidal vibration, pyroshock test, thermal cycling and thermal vacuum.

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Last updated: 2026-06-27