TSR models
The crossed-dipole turnstile antenna with reflector
is ideal for Hemispherical coverage , as it receives right hand
circular polarisation when the satellite is directly
overhead, and has an omnidirectional, horizontally
polarized pattern for signals arriving parallel to the
ground. The reflector shields the crossed-dipole element
from ground reflections which otherwise may cause
the signal to disappear into the noise due to
cancelling effects. Enhancing the
dipole-to-reflector spacing from ideally 0.4 λ to
0.45 λ increases the strength of signals received at
low angles. Consequently, a constant signal throughout the pass
with virtually no fading is ensured.
Available in the frequency bands of
140 to 200 MHz and
136 to 138 MHZ