Surge diverters for TETRA
15 January 2007 14:41
For TETRA systems SPINNER offers a surge diverter with a l/4 short circuit that features low reflection and excellent protection properties and is very compact in design at the same time.
Surge diverters are becoming in-creasingly important protectors against electrical disturbance in coaxial transmission systems.
It is mainly exposed antennas, masts and mobile communication ground stations that are threatened by lightning damage.
Short-circuited l/4 stubs have proven to be very effective because they can divert powerful currents to ground. Another advantage is the low residual pulse energy passed on to the protected side.
In addition to the well-known product range for the mobile communication networks GSM900, GSM1800, UMTS, and WLAN SPINNER can now offer a surge diverter with a l/4 stub for the TETRA network, too.
The well-designed combination of transformer elements has allowed
us to cut the length of the stub, which would usually have to be about 20 cm for the TETRA network frequencies, to one third. The
resulting compact shape opens up possibilities of using the diverter in locations where low weight is an advantage and where only limited installation space is available.
At the same time the guaranteed VSWR is as low as 1.20 for the fre-quency range between 380MHz to 430MHz, and 1.22 between 430MHz to 512MHz.
For more information on this company:
SPINNER - RF Components for Mobile Communication Networks
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