1. The "half-wave" term means that the length of
this dipole antenna is equal to a half-wave
length at the frequency of operation. It is well
known that the centre of a half wave antenna
is approximately 73 ohms impedance. That is
why the formula for a half wave (in feet) is
492/F while the formula for a half wave
antenna is 468/F (assuming a thin conductor).
As the conductor is made thicker, the element
will need to be even shorter. If the half
wave antenna is ground mounted and you
have a ground rod, that's where the currents
will go. This will give a good SWR but be
more loss because of the power being
dumped into the dirt.
antenna
2. Device antennas are typically designed as quarterwave or half wave As
a rule of thumb, quarterwave antennas require a ground plane but half
wave antennas are ground plane independent and do not need a ground
plane to operate
3. However, most M2M antennas show improved performance with a
larger ground plane The Delta 9 is a half wave whip antenna with SMA
male connector
4. The Delta 9 is overmoulded in black engineering plastic offering a UV
and weather proof resistance to the half wave whip tuned to 433MHz via
its SMA male connector Offering a wide frequency range, the Delta 9
is also suitable for operating between 428 and 438MHz in radio
installations capable of transmitting up to 35 Watts power
5. have been producing and souring antennas and cable assemblies for
over 10 years We supply and Cables globally to many of the worlds
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