2.4 GHz Antennas
Afar offers the following 2.4 GHz antennas for use with the PulsAR-24027 Wireless Ethernet Bridge. The correct antenna at each site depends on the application:
Point to Point links: Use high gain directional antennas on both sides. For very long distances use the 24 dBi gain parabolic grid. If you do not need as much gain and prefer the convenience of a smaller antenna consider the 19 or 16 dBi panel antennas.
Point to multipoint networks: Use the 9 dBi omni antenna at the hub and the directional antennas at fixed remotes pointing at the hub. If all the remote units are concentrated in one sector of the hub you should consider a sector antenna which will give you more gain than the omni and shield the radio from interference coming from unwanted directions. Please contact us for additional antenna choices.
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Products 
This is a parabolic grid reflector antenna built in aluminum die cast and powder coated for long outdoor life. Includes a galvanized heavy duty bracket for mounting onto poles 1" to 2" diameter (2.5 to 5.0 cm). Comes with a 30" (75 cm) pigtail terminated into a N type male connector for connecting directly into the 
Flat panel antennas provide high gain in a low profile package. The
antenna is constructed on an aluminum backplate with a gray, UV
resistant ABS plastic radome. They can be mounted for Vertical or
Horizontal polarizations. Select between a 16 or 19 dBi gain.
This omni directional antenna is built of UV-resistant fiberglass and comes with a stainless steel bracket for easy mounting to an outdoor structure. The connector is N-Female and we supply a short 2 ft (60 cm) coaxial cable for direct connection to our outdoor 
For situations where the signal is impaired by multipath distortion (reflections) a circularly polarized antenna can provide significant relief.