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12dBi 400-490MHz Single Polarization Sector Antenna

The 400-490 MHz frequency range consists of UHF radio bands used by many public safety departments, as well as a vast selection of machine to machine radios. The most popular frequencies in this band include 400 MHz, 420 MHz, 450 MHz, and 470 MHz. This antenna is used for voice communications in two-way radio, as well as for telemetry, SCADA and M2M/machine-to-machine data transfer.

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Product Description

The 400-490 MHz frequency range consists of UHF radio bands used by many public safety departments, as well as a vast selection of machine to machine radios. The most popular frequencies in this band include 400 MHz, 420 MHz, 450 MHz, and 470 MHz. This antenna is used for voice communications in two-way radio, as well as for telemetry, SCADA and M2M/machine-to-machine data transfer.


12dBi 400-490MHz Single Polarization Sector Antenna

The 400-490 MHz frequency range consists of UHF radio bands used by many public safety departments, as well as a vast selection of machine to machine radios. The most popular frequencies in this band include 400 MHz, 420 MHz, 450 MHz, and 470 MHz. This antenna is used for voice communications in two-way radio, as well as for telemetry, SCADA and M2M/machine-to-machine data transfer.

A common misconception
One of the most common misunderstandings is the belief that an antenna type should be selected based on gain. Gain is the measurement of an antenna’s ability to concentrate the signal it receives and sends. Many people think “the bigger the gain, the better the antenna, and bigger are better,” but this is not correct: Don’t get caught up in the “gain game.” Gain has its place, but it may not be the most important factor in your situation.
Which antenna is the right one for me?
Most of the time—perhaps 90% or even more often—it’s best to use an Omni antenna as the donor antenna on your home or building. There are times when directional antennas are best, but Omni antennas, overall, do the best job in typical situations.
If you do not exactly know how to choose, contact us, we can help you!

To increase or widen the coverage area, and thus the number of served clients, several sector antennas are installed on the same supporting structure, e.g. tower or mast.[citation needed]
Such a construction is often called a sectorized antenna, though sometimes for brevity "sector antenna" is used as well. It has several angularly-separated sector antennas.
Once the antenna unit is attached to a supporting structure, it has to be positioned. Positioning means not only setting a correct direction or azimuth but setting a correct downtilt as well. By restricting emitted energy to a sub-circular arc and narrow vertical coverage the design makes efficient use of relatively low power transmitter equipment. Though the absolute range is limited, this configuration allows for good data rates (digital information transfer measured in bits/second, sometimes given as total minus error-correction overhead), and good signal consistency within the coverage area.
Prior to positioning, grounding and lightning protection are required. all supporting constructions have lightning rods.
An antenna at bottom has bigger mechanical downtilt
A well-chosen downtilt setting strategy can lower the overall interference in the network. A too-aggressive down tilting strategy will, however, lead to an overall loss of coverage due to cells not overlapping. Downtilting can be used to solve specific problems, for example, local interference problems or cells that are too large. Electrical tilting slightly reduces beam width.
The sector antennas with different mechanical downtilts. Note that a more vertical antenna is less visible than a mechanically tilted one - the use of purely electrical tilt with no mechanical tilt is, therefore, an attractive choice for aesthetic reasons which are very important for operators seeking acceptance of integrated antennas in visible locations.


Electrical Specifications

 

Item: CTBS-4049-12D75VBZ

 

400-490MHz Single Polarization Base Station Antenna

 

Specifications:

Frequency: 400-490MHz

Gain: 12dBi

H-Beam width: 75°±10°

V-Beam width: 25°±5°

V.S.W.R: 1.5

F/B Ratio: ≥23dB

Polarization: Vertical

PIM: (2@43dBm) ≤-150dBc

Dimension: 1200*280*125mm

Features:

Single Polarization

Low-Profile

Low V.S.W.R

Low Loss Design

High Gain

High Efficiency

High Sensitivity

UV-Proof

Water Proof

Sturdy

Durable

Anticorrosive

Anti-interference

Good Impact Resistance

Full Day Working

Optimized Dimensions





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