Iridium and RBGAN antennae

 

Robust-high performance satellite communications antennae.

For sales of all Iridium and Thuraya products please refer to Applied Satellite Technology Ltd. (www.satcomms.com)

 

AD510-1 Passive Iridium Antenna

 

The AD510-1 is a rugged passive Iridium antenna designed to operate in harsh environments. The antenna’s radome is 4 mm thick GRP and the base is milled from aluminium and hard anodised to give a green finish that is mechanically resilient and resistant to corrosion.

The AD510-1 has a RHCP radiation pattern over the Iridium band and should be mounted to give an unobstructed view of the sky from horizon to horizon. The bracket (AD510-2) provided with each antenna can be attached to a mast or spar up to 60mm in diameter using the V-bolts provided.  Connection to the Iridium handset is made with an appropriate coaxial cable from the TNC (or optional N type connector) on the underside of the antenna. An optional PVC mounting bracket with 1" diameter 14TPI pipe thread is also available.

 

AD510-1 passive iridium antenna with mounting bracket and down-lead attached.

 

 

 

 

AD510-10 Active Iridium Antenna

 

Iridium telephones were originally designed to operate with passive antennae, either an element attached directly to the handset, or a remote aerial connected with a short length of coaxial cable. Unfortunately, a signal loss of more than 3dB in a remote antenna’s connecting cable degrades performance due to attenuation of both the received and transmitted signals. A 3dB loss corresponds to approximately 10m of RG213U or 3m of RG58U coaxial cable, lengths that clearly restrict the mounting options for the antenna using standard down-leads.

The AD510-10 active Iridium antenna is designed for use with 40m (131 feet) of RG213U coaxial cable terminated with type ‘N’ connectors. Designed for harsh environments, the AD510-10 consists of two RHCP dipole antennae housed within 4mm thick GRP radomes mounted on a common base. One antenna is for signal transmission and one for reception. A linear power amplifier within the base and connected to the transmitting antenna compensates for signal loss incurred mainly by the connecting cable. Similarly, a low noise amplifier is attached to the receiving antenna via a low loss interdigital filter to boost the signal sent to the telephone. The interdigital filter has a bandwidth of 12 MHz centred on the Iridium band designed to attenuate any out of band interference that may arise, for example from nearby Inmarsat uplinks.

Using manufacturing techniques proven for a range of extremely rugged GPS/DGP active antennae, the antenna base is milled from aluminium and hard anodised, giving an attractive green finish, which is mechanically resilient and resistant to corrosion. The antenna’s mass is 2.6kg.

 

AD510-10 Active iridium antenna from above.

 

 

 

 

 

 

 

AD570-30 RBGAN antenna

 

A rugged RBGAN antenna intended for use with left hand (e.g. those from the Thuraya satellite) and right hand circularly polarised signals. Designed to operate in harsh environments, the antenna elements are contained in a UV-polycarbonate radome and mounted on a hard anodised, milled aluminium base.  A bracket is provided with each antenna, which can be attached to masts up to 60mm in diameter using the V-bolts included. The bracket has a horizontal plate for an ancillary GPS antenna. Two N-type connectors provide selectivity for LHCP and RHCP.

 

 

 

AD570-30 RBGAN antenna fixed to its bracket with an optional rugged GPS antenna at the top and down-leads.

The diameter of the antenna is 310mm.

 

 

 

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