ZE60-2.4 RF module User Guide
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 41 of 45
1vv0300844
Rev.2 – 24/08/2010
VII.3.
Antenna types
The following are the antenna examples that may be suitable for ZE60-2.4/SMD-WA applications. We distinguish
two types of antenna:
¾
External antenna (antenna is mounted outside of the device)
¾
Embeddable antenna (antenna is integrated inside the device)
VII.4.
External antenna
External antenna is recommended when the range performance is primordial. For example, for base stations and
access points, where a better antenna gain may be required.
¼ Wave Monopole antenna:
The ¼ Wave antenna is 3 cm long @ 2.4 Ghz. Shorter compensated antennas could be used as long as they are
adapted to 2.4 GHz frequency.
Best range may be achieved if the ¼ Wave antenna is placed perpendicular in the middle of a solid ground plane
measuring at least 5 cm radius. In this case, the antenna should be connected to the module via some 50 ohm
characteristic impedance coaxial cable.
Ground plane
connected to coaxial
ground
¼ Wave Antenna,
connected to hot point.
Coaxial hot and ground soldered
on the ZE60 RF output
WARNING
The metallic plane must be ideally under the antenna (balanced radiation). Never
short-circuit the hot and cold pins!
The installation directives are the following:
¾
Solder the coaxial cable on the hot and ground pad antenna (of the ZE60-2.4 module.)
¾
Fix the antenna on a metallic plane or on a metallic box with the metallic screw provided with the antenna.
¾
If the ZE60-2.4 module is integrated in a plastic box, use a metal tape (copper) glued on the plastic side
under the antenna.