Key highlights

EnduroSat’s X-Band 4x4 Patch Array Antenna is a high-gain, circularly polarized array that uses sixteen radiating patches to deliver more than 16 dBi of gain across the 8025–8400 MHz X-band. The narrow 18° half-power beam width concentrates radiated power for fast, efficient payload data downlink, while the antenna keeps a low-profile 82.6 x 98 mm footprint and 52.85 g mass for straightforward accommodation on CubeSat and SmallSat structures.

Offered in right-hand or left-hand circular polarization with an SMP RF connector, the array handles up to 4 W of RF input and operates from −40 to +125 °C. It is qualified for a 5-year mission lifetime under ESA ECSS-E-ST-10-03C and NASA GEVS GSFC-STD-7000A, including random and sinusoidal vibration, shock, and thermal cycling, and is assembled in a Class 7 ISO 14644 cleanroom.

Applications

High-throughput payload data downlink for CubeSats and SmallSats
Earth observation, SAR and imaging missions with large data volumes
Missions needing higher gain than a single patch or 2x2 array without a steerable dish
LEO missions requiring space-qualified high-gain circularly polarized antennas

Key features

Configuration:
4x4 (sixteen-patch) array
Gain:
>16 dBi over operating bandwidth
Half-power beam width:
18°
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 (preferred) or Z
Operating temperature:
−40 °C to +125 °C
Mass:
52.85 g
Dimensions:
82.6 × 98 × 7 mm
Qualification:
ESA ECSS-E-ST-10-03C and NASA GEVS GSFC-STD-7000A; 5-year mission lifetime

Flight heritage

The EnduroSat X-band 4x4 Patch Array 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