Skip to main content
Iridium Passive Antennas
“...suited to high performance in iridium applications, particularly when worn close to the body.”
Where to buy Watch this document

SL3101 & SL3105 Passive Iridium Antenna

Built on patented PowerHelix® filtering antenna technology, the SL3101 & SL3105 Iridium antennas provide high performance in difficult Iridium applications using an decafilar helix design. The SL3101 & SL3105 antennas are ideal in applications where:

  • the device is handheld, body-worn, or otherwise surrounded by high-dielectric materials that would de-tune conventional antennas
  • the antenna is tightly integrated with other antennas, e.g., Iridium/GPS receivers
  • there are tight constraints on the size of the device or the amount of space allocated to ground planes

Applications:

Any product using Iridium modems.

  Minimum Typical Maximum Unit
Part Number SL3101 & SL3105(See ‘Product Ordering information’ for detail) Each
Type Decafilar Helix 
Frequency 1616 1621 1626 MHz
Polarization Right Hand Circular Polarized 
Gain  +2.0  dBic @zenith
Efficiency  65%  Total spherical
Beamwidth >120  Degrees
Bandwidth(1dB)  15  MHz
Axial Ratio <1.5  @ Zenith
VSWR <2.0:1 2.3:1 
Impedance  50 Ω
Operating Temperature -40 +20 +85°C
Element Dimensions 14 (diameter) x 33 (length) mm
Overall Dimensions (radome) 19 (dia) x Connector dependent (length) mm
Weight 29, 48, 48(SP, TJ, TP) grams

Part Number Description MOQ Pack Size
SL3105SP SL3105 with SMA Plug Connector 60 60
SL3101TP Iridium antenna with TNC Plug 60 60
SL3101TJ Iridium antenna with TNC Jack 60 60

Sarantel - the leading manufacturer of dielectrically loaded, iridium GPS antennas.

Sarantel’s Power Helix antenna technology is the result of 20 years of research in balancing electric fields across a dielectric core.