Getting Radio Equipments
Getting the antenna, coaxial cable, lightning arrestor for outdoor installation might be difficult at the first time for technicians with computer only background. Most of advanced radio type equipment cannot be found in normal WiFi store, especially the one aim for indoor installation.
One of good example for on-line radio equipment store especially aim for WiFi outdoor installation is http://www.ydi.com.
For example, we can found various type of antennas, including omnidirectional antennas, sectoral antennas, yagi antennas and parabolic antennas on different polarization, i.e., vertically or horizontally polarized.
Clicking on certain antenna, we can see the picture of the antenna. Some include the antenna radiation pattern. The antenna specification in PDF format can also freely be downloaded.
In the specification page, we can review the antenna gain, Voltage Standing Wave Ratio (VSWR) for certain frequency range, 3 dB beamwidth, Front-to-Back (F/B) ratio, cross polarization rejection, impedance etc.
Having all this information in hand, it would be very useful for selecting an appropriate antenna for our wireless wide area network.