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TXP-WTA_Instruction_Manual_(Rev1.3)
10 TracXP Antenna Selection
10.1 Antenna Selection
10.1.1 Dipole and Collinear Antennas
Key Qualities & Notes
•
Connected to the Radio via a length of coax cable.
NOTE: If the cable is larger than 6mm diameter (1/4 inch), be aware of sideways tension on the connection.
Thick cables have large bending radii and sideways force on the connector can cause a poor connection
The polarity of these antennas is the same as the main axis, and they are normally installed vertically. If the
•
antenna is mounted vertically, it is only necessary to mount the other antennas vertically for optimum
"coupling" – this is easy to achieve.
•
They can be mounted horizontally (horizontal polarity), however the antenna at the other end of the
wireless link would need to be mounted perfectly parallel for optimum performance.
•
NOTE: This is very difficult to achieve over distance.
•
It is important the antenna mounting bracket is well connected to "earth" or "ground" for good lightning
surge protection.
•
RF Antenna's provide the best performance when installed with at least 1 to 2 wavelengths clearance of
walls or steelwork. 900MHz antennas require at least 2 Feet of clearance and 2.4GHz should have 6 inches.
Antennas may be mounted with less clearance, but the signal will be reduced with less clearance. This will
not cause a problem if the distance between the transmitter and controller is short.
The wavelength is based on the frequency–for example:
•
Wavelength in meters = 300 / frequency in MHz
Wavelength in feet = 1000 / frequency in MHz
•
Antennas may be mounted with less clearance, but radiation will be reduced. If the radio path is short this won't
matter. It is important the antenna mounting bracket to be well connected to "earth" or "ground" for good
lightning surge protection.
REV – 1.3
[34-2900-0207-4 ]
44 |
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