About The Wireless Signal Transmission Capacity of Industrial-Grade Routers
Industrial
router "wireless signal transmission capacity" is an important
indicator because wireless LAN USES wireless microwave band. The biggest
feature of microwaves is that they travel almost in straight lines, and their
diffracted power is so weak that the wireless receiving devices of
industrial-grade routers behind obstacles are blocked by them. So for a
wireless microwave signal to travel in a straight line, it has to "penetrate"
the barrier to reach the wireless device behind it. The wireless signal of an
industrial wireless router that "cuts through" an obstacle will
gradually become a weaker signal. 4G wireless router.
For
users, the hope is that the wireless signals of industrial-grade wireless
routers will at least penetrate the walls and floors inside. There are many
kinds of wall materials, such as wooden wall, glass wall, brick wall and
concrete wall. Floors are usually reinforced concrete. Each passing through a wall,
the wireless reception signals more or less attenuate, and the building
structures above attenuate in turn from low to high. Once wireless equipment
with low transmitting power, poor receiving sensitivity and insufficient
antenna gain is selected, the wireless signal of industrial 4G router will attenuate
sharply, the transmission rate will drop rapidly, and even the wireless blind
spot will appear at home, and the connection will be broken when the blind spot
is encountered.
The
transmission power, reception sensitivity (bidirectional), antenna gain, and
effective transmission distance of the wireless equipment of industrial 4G
router are all directly related to the blocking penetration capacity and
connection stability as well as the ultimate actual transmission rate. The
whole network router is a key indicator to realize the stable seamless
connection of speed.
The
ability of a wireless device to penetrate walls usually depends on the
following technical indicators:
(1)
the maximum transmission power of the wireless LAN device specified in
IEEE802.11 is 20dBm (100 milliwatts), and generally the larger product should
reach 17dBm.
(2)
the current optimal receiving sensitivity is -105db. After passing through a
layer of wood, the receiving signal will attenuate by 4dB; After passing
through a brick wall, the receiving signal will attenuate 8 ~ 15dB. Through
reinforced concrete walls, the attenuation shall be at least 15 ~ 30dB.
Transmission sensitivity up to 105dB wireless full network router equipment
with strong wall penetration; It is capable of continuously penetrating
reinforced concrete walls up to 1.2 meters thick on three sides with a total
interval of 30 meters without any relay equipment.
(3)
the antenna gain is preferably 3 ~ 5dBi. General wireless LAN equipment has an
antenna gain of 2dBi. According to experience, the gain antenna signal of 2dBi
industrial router can penetrate two walls. If room is too much, the partition
wall that passes is more, had better be equipment is antenna can be
disassembled, in order to configure high gain antenna, if change the
omnidirectional antenna of 5dBi, try to enhance. Need to point out that the
metal object obstacles, not only stop the microwave wireless signal, it can
also give absorb electromagnetic energy, generating low current discharge,
therefore, industrial LTE wireless router signal in the family environment is
one of the biggest obstacles in steel slab, the direction of the signal almost
did not penetrate. The industrial network router's antenna
is a passive device that does not increase power regardless of the gain of the
antenna it does not transmit higher power than the industrial network router
itself.
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