Cisco 4G-ANTM-OM-CM, Manual

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Cisco 4G LTEA, 4G LTE, and 3G Omnidirectional Dipole Antenna (LTE-ANTM-SMA-D)
Caution:
Do not install the antenna in an outdoor environment.
Caution:
For your physical safety, and to help you install your antenna successfully, follow these safety
precautions.

Plan your installation procedure carefully and completely before you begin.

Choose your installation site with both safety and performance in mind.

If you are installing an antenna for the first time, for your own safety as well as others, seek professional assistance. Your
Cisco sales representative can explain which mounting method to use for the size and type of antenna you are about to
install.

Before you install an antenna, contact your Cisco account representative to explain which mounting method to use for the
size and type of antenna that you are about to install.
Installation Instructions
The following section contains information for installing the LTE-ANTM-SMA-D antenna:
This antenna is designed to be mounted either directly or on an antenna extension stand to any Cisco 3G/4G wireless ISR, LTE
and LTEA router with an SMA(f) connector by threading it onto the mating connector. Refer to the routers technical
documentation for recommendations of direct mounting of antenna to the router versus installing the antenna on an antenna
extension stand. Mount and deploy the antenna at the 0° position, 45° position, or the 90° position, and then change that
position at will. The rotation of the antenna into the proper position can take place while the antenna is still loose on the mating
connector. No software is required for this installation.
In addition to the antenna orientation, the installation location of 4G routers and cellular modules play a significant role in
determining overall network performance. Routers located at the farthest coverage points might have 10 to 50 percent of the
bandwidth available compared to routers located closer to the cellular base station tower.
Because antennas transmit and receive radio signals, their performance can be adversely affected by the surrounding
environment, including physical obstructions. Radio frequency (RF) interference may occur between wireless systems located
close to each other, especially if the antennas of these systems are located close to each other.
Follow these guidelines to ensure the best possible performance:

When you use the antenna on a modular router with an LTE pluggable module, always mount the antenna on an appropriate
extension cable and antenna stand. The antenna performance, and therefore that of the router, will not be optimal if
mounted directly to the pluggable module.

Mounting of the antenna directly to smaller physical size routers is allowed.

For optimal performance, space multiple antennas apart by at least 17 inches (43 cm).

The lowest LTE frequency of 700 MHz 17 inches represents 1 wavelength. Spacing of 0.5 wavelength or 8.5 inch (22.5cm)
results in good performance.

Spacing of less than 8.5 inch may result in significantly reduced MIMO performance.

Spacing antennas close to each other (e.g. 3") results in antennas detuning from their original designed performance due
to antenna coupling.

Wherever possible, mount the ISR cellular router or the pluggable LTE module and antenna where the cellular base station
or tower are within sight and without physical obstructions. Barriers along the line of sight between the device and the local
base station will degrade the wireless radio signals. Install ISR cellular routers, pluggable modules and antennas above floor
level in office environments or near the ceiling for better performance because most obstructions tend to be near the floor
level.