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62 | Allied Telesis Product Catalog
Wireless
Wireless Antennas
ANTENNA
TYPE
GAIN (dBi)
ALLIED TELESIS TenQ ANTENNA MODEL LOBE WIDTH (º)
POLARIZATION
2.4GHz 5GHz Horizontal Vertical
OMNI
2 AT-TQ0500 360 45 vertical
5 AT-TQ0500 360 30 vertical
8 AT-TQ0201E AT-TQ0501E 360 17 vertical
12 AT-TQ0202E AT-TQ0502E 360 5 vertical
PANEL
8 AT-TQ0221E AT-TQ0521E 75 50 vertical / horizontal
15 AT-TQ0222E AT-TQ0522E 30 30 vertical / horizontal
20 AT-TQ0223E AT-TQ0523E 15 15 vertical / horizontal
SECTOR
12 AT-TQ0241E AT-TQ0541E 120 15 vertical
14 AT-TQ0242E AT-TQ0542E 60 15 vertical
18 AT-TQ0243E 30 15 vertical
PARABOLIC
19 AT-TQ0261E 15 15 vertical
23 AT-TQ0561E 7.5 7.5 vertical
24 AT-TQ0262E 8 8 vertical
27.5 AT-TQ0562E 5.2 5.2 vertical
Antenna Types
Omni
Omnidirectional antennas
radiate power uniformly
in every direction on the
horizontal plane. Most access
points and client devices have
omnidirectional antennas.
Panel
A at antenna with a radiation
lobe similar to a cone. It is
directional and is normally
used for point-to-point links or
at the end-points of a point-
to-multipoint network.
Sector
A at antenna with a radiation
lobe similar to a cone with
an elliptical footprint. It is
directional and is normally
used in the central site of a
point-to-multipoint network.
Parabolic
A dish-shaped, directional
antenna with a radiation
lobe similar to that of a panel
antenna. It is usually larger
than a panel and has a higher
gain. Parabolic antennas are
suitable for long distance
point-to-point links.
Gain
Gain expresses how much an antenna
enhances its transmitted and received
signals relative to a simple dipole. Gain is
expressed in dB and is logarithmic.
Polarization
Denes the position in space of electrical
and magnetic elds. The best signal
transfer happens when both transmitting
and receiving antennas have the same
polarization. A 90° difference in
polarization between transmitting and
receiving antennas may produce up to
-30dB of signal attenuation.
Loss
Loss is the attenuation, or reduction in
power, of a system, expressed in dB. All
cables and connector devices have a loss
variable and must be considered when
designing a wireless system, especially
when directional antennas are used.
Top View
Top View
Top View
Top View
Side View
Side View
Side View
Side View
LOW GAIN
LOW GAIN
HIGH GAIN
HIGH GAIN
Top View
Top View
Top View
Top View
Side View
Side View
Side View
Side View
LOW GAIN
LOW GAIN
HIGH GAIN
HIGH GAIN
Top View
Top View
Top View
Top View
Side View
Side View
Side View
Side View
LOW GAIN
LOW GAIN
HIGH GAIN
HIGH GAIN
Top View
Top View
Top View
Top View
Side View
Side View
Side View
Side View
LOW GAIN
LOW GAIN
HIGH GAIN
HIGH GAIN
Top View
Top View
Top View
Top View
Side View
Side View
Side View
Side View
LOW GAIN
LOW GAIN
HIGH GAIN
HIGH GAIN
An omnidirectional antenna concentrates
the signal in a 360° belt around it.
The higher the gain, the thinner the
belt, resulting in a better signal far
from the antenna — but a narrower
communication area.
Panel and parabolic antennas have a
nearly circular footprint. Low gain panels
can be used for both short distance
point-to-point and point-to-multipoint
links as well as straight roads coverage.
High-gain panel and parabolic antennas
produce such a small spot that they
should be deployed only in medium- to
long-distance point-to-point links.
A sector antenna footprint is a horizontal
ellipse with a width of 30°, 60°, 90° or
120°. High gain sector antennas have a
vertically thinner footprint while keeping
the same horizontal width, suited for the
central site of a point-to-multipoint link or
coverage of a certain “sector” in mobile
networks.
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- Company Details 72
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