ARLA/CLUSTER: Nova " HF Active Loop Antenna " já se encontra em produção

[João Costa > CT1FBF]

HF Active Loop Antenna

Cross Country Wireless have released a HF Active Loop Antenna with a
frequency range of 200 kHz to 70 MHz with extended coverage up to 148
MHz.

The antenna can be for all LF, MW and HF professional monitoring and
short wave listening. It can also be used for VHF FM reception and
will give useful VHF airband reception when mounted outdoors.

The antenna is a triangular loop antenna 1.3m (51") wide with a
built-in low noise high dynamic range RF amplifier. A base unit allows
12V power to be fed up an ethernet cable feeder to the antenna. The
antenna current consumption is 150 mA. The base unit also has a two
way splitter to provide two separate RF outputs.

Local RF noise rejection of the antenna allows it to be used indoors
with good results where outdoor installation is prohibited. In
addition to the excellent local noise rejection properties of the loop
antenna, transformer isolation, common mode chokes and the balanced
pairs in the ethernet cable help keep RF noise away from the antenna
element.

The antenna is built from fibre glass and stainless steel with a
polycarbonate box housing the amplifier. For outdoor installation a
mounting bracket allows it to be mounted to a 50mm (2") pole using a
clamp fitting or a 25mm (1") using a Stauff clamp for mounting on
Clark Mast or Hilomast telescopic masts.

The antenna can be quickly assembled and disassembled to allow
portable operation from temporary listening sites with compact storage
and easy installation in areas with restricted access.

BNC female connectors are used for the RF output ports on the base
unit. RF over-power protection on the antenna and the RF outputs allow
the antenna to be used very close (>2m) to transmit antennas and
tolerate accidental connection of a transmitter to the RF output
sockets for a short period (150W for 30 seconds) without damage. The
antenna could be mounted on top of a rotatable HF beam as a low noise
diversity reception antenna.

The antenna is supplied with 20m of ethernet cable and a mounting kit
with fittings for mounting on 50mm (2") or 25mm (1") diameter masts.

The antenna is now in production.

http://www.crosscountrywireless.net/