In addition to the standard single and three-radio versions of the
Access Server - which have internal antenna - the 2291-EXT and 2293-EXT are
specifically designed for use with external Bluetooth antennas.
These
products facilitate mounting the Access Server in an alternative location, or,
with additional antennas, improvement in the Bluetooth communication range.
The Access Server 2291-EXT and 2293-EXT are supplied with
Reverse-Polarity-SMA connectors for each Bluetooth antenna connection, and a
suitable antenna for direct connection to the Access Server.
The
supplied antenna - a 1/2 wave dipole with 'knuckle' - provides an enhanced
range in many installations.
In addition to the supplied antennas, it is
possible to remotely mount alternative antenna's to further enhance the range,
or allow Access Server re-location.
The BT-Blade is a thin blade antenna
for the 2.4 GHz frequency band. It is a ground-plane independent design, and
has a waterproof cover to make the antenna more durable. This makes it ideal
for discrete fixed or mobile applications.
The Z-Top is a very low profile 2.4 GHz
external antenna which measures approximately 83mm in diameter and approx 14mm
in height. The Z-Top, offers an omni-directional radiation pattern and max 1.0
dBi gain. It is supplied with a SMA-Female Bulkhead connector underneath,
designed to allow a stable fixing through a suitable hole. The Z-Top is ideal
for applications such as kiosks and where an external antenna should attract as
little attention as possible or where it will be deployed marginally above the
eye-line. Z-Top is available in a black or white radome.
This antenna is an excellent choice for a low
profile directional antenna. It is designed to be mounted to a flat surface or
attached to mast brackets. The directional patch element is designed for
frequencies of 2400 MHz to 2500 MHz and has a 8.5 dBi gain when measured at the
standard Type N coax connector.
This gain requires a suitable reduction
in output power, in order to comply with Bluetooth Certification, after taking
into account the associated losses in additional connectors and cabling.