Symptom:
Weak wireless signal showed, low wireless speed or range.
Cause:
The factors most frequently affecting the wireless signal:
1) Intrinsic factors:
·Transmission Distance.
Regarding on the wireless device particularly working on 5GHz band, it will be more sensitive to the obstacle.
Though there will be more clear channels than those of 2.4GHz bands, the wireless signal will be reduced
significantly and transmit in shorter range due to higher frequency.
·Antenna.
Omni-directional antennas and directional antennas
Omni-directional antennas are resembled in our home products like wireless router or wireless ADSL2+ Modem
Routers, they radiate horizontally all around, but are weaker upward or downward as the picture shows.
While a directional antennas radiate strongly in a particular direction which are usually used for high power
outdoor products. The gain of a directional antenna increases, also with the coverage distance, but the effective
coverage angle decreases. Generally, the higher gain value of an antenna, the better directional ability will be.
For directional antennas, the lobes are pushed in a certain direction and little energy is there on the back side of
the antenna. Please refer the picture below.
