About Connected Grid Antennas

This section describes the Cisco 1120 Connected Grid Router antennas, and describes how to find product and installation information for all Cisco Connected Grid antennas. This chapter includes these sections:

blank.gifRouter Antennas Overview

blank.gifInstalling or Replacing Module Antennas

blank.gifAntenna Specifications

Router Antennas Overview

This section describes the antennas used with the router.

Router Antennas

The router ships with two antennas that support router functionality:

blank.gifGPS Antenna

blank.gifWiFi Antenna

Module Antennas

The router also supports Connected Grid module antennas. For more information, see Connected Grid Module Antennas.

Figure 1 Router WiFi and GPS Antenna Locations

 

302342.eps

 

1

WiFi antenna port

2

GPS antenna port

GPS Antenna

The Connected Grid GPS Antenna kit (optional) includes the following items:

blank.gifGPS antenna with integrated 15-foot coaxial cable (see Figure 2)

blank.gifMale QMA connector adapter, to connect the cable to the router GPS antenna port

blank.gifHardware required to mount the antenna, for example on the substation or utility cabinet exterior

This antenna provides connectivity to the GPS system, from which the router derives precise time and location information while operating on the network.

GPS Antenna Information

Caution: If the antenna is mounted outside, the antenna assembly must be grounded either at the bracket or at the external building point where the cabling enters the building. This is critical because if it’s not grounded, the CGR 1120 chassis would be isolated on the antenna card very close to AC isolation requirements. Also see Statement 1052 below.

Warning: Do not locate the outdoor antenna near overhead power lines or other electric light or power circuits, or where it can come into contact with such circuits. When installing the antenna, take extreme care not to come into contact with such circuits, as they may cause serious injury or death. For proper installation and grounding of the antenna, please refer to national and local codes (for example, U.S.:NFPA 70, National Electrical Code, Article 810, Canada:Canadian Electrical Code, Section 54). Statement 1052

blank.gifThe GPS antenna is a field-replaceable component.

blank.gifFor detailed technical information about the GPS antenna, see GPS Antenna Specifications.

blank.gifFor information about the GPS status LED, see Router LED Locations and States.

blank.gifFor more information about the internal GPS module, see the Internal GPS Module.

Figure 2 GPS Antenna with Mounting Hardware and Male QMA Adapter

 

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WiFi Antenna

The Connected Grid 4GE LTE WiFi antenna kit (optional) includes the following items:

blank.gif4G LTE indoor swivel-mount antenna (see Figure 3)

blank.gifMale QMA connector adapter, to connect the antenna to the router WiFi antenna port

The WiFi antenna provides connectivity to the router internal short-range access point.

The short-range access point enables a WiFi link so users can connect to the router from anywhere within WiFi range. For example, a technician can check the status of the router from outside the substation or utility cabinet by connecting to the router over the WiFi link.

WiFi Antenna Information

blank.gifThe Cisco order number of the WiFi antenna kit is: ANT-4G-DP-IN-TNC.

blank.gifThe WiFi antenna is a field-replaceable component.

blank.gifFor detailed technical information about the WiFi antenna, see WiFi Antenna Specifications.

blank.gifFor information about the WiFi status LED, see Router LED Locations and States.

blank.gifFor more information about the WiFi short-range access point that provides the WiFi connection to the router, see WiFi Short-Range Access Point.

Figure 3 4G LTE WiFi Antenna and Male QMA Adapter

 

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Connected Grid Module Antennas

In addition to the two fixed antennas (GPS and WiFi), the router supports additional antennas that provide connectivity to the Connected Grid modules installed in the router.

The router supports up to two Cisco Connected Grid modules. Each module requires one antenna or two antennas (one main antenna and one diversity antenna). The total number of antennas installed with the router depends on:

blank.gifNumber of modules installed in the router.

blank.gifModule types that are installed in the router

For detailed information about the Connected Grid module antennas, see the Connected Grid antennas documentation, at: www.cisco.com/go/cg-modules

Installing or Replacing Module Antennas

Depending on the configuration you specified, the router could arrive in the shipping container with all required antennas already installed and connected to the corresponding Cisco Connected Grid modules, also installed in the router.

However, you might need to install an antenna when:

blank.gifYou purchase a module separately from the router. The antenna is included with the module, and must be installed on the router to complete the module installation.

blank.gifYou purchase an antenna separately to replace a faulty or damaged antenna.

blank.gifThe antenna form factor prevents requires that it be installed after the router has shipped.

Where to Find Antenna Installation Information

For instructions on how to install or replace antennas on the router, see the Cisco Connected Grid antenna documentation on Cisco.com, at: www.cisco.com/go/cg-modules

Table 1 Connected Grid Modules for CGR 1000 Series Routers Documentation

Title
Description

Cisco Connected Grid Antennas Installation Guide

Installation procedures and safety information for all models of Cisco Connected Grid antennas.

Cisco Connected Grid Antennas Overview

An overview of antenna technology, antenna types, and Cisco Connected Grid antennas and accessories.

Choosing Your Cisco Connected Grid Antenna

A decision tree to help you choose the correct antennas for your platform and physical environment.

Antenna Specifications

This section contains specifications for the fixed antennas that ship with the router.

For all technical details and specification for these and other Cisco Connected Grid antennas, see the Cisco Connected Grid antenna documentation on Cisco.com at: www.cisco.com/go/cg-modules

GPS Antenna Specifications

 

Specification
Value

Dimensions

Cable length: 15 feet (460.8 cm)
Diameter of antenna rodome: 1.97 inches (50 cm)

Connector (cable to router)

TNC male

Frequency

1575.42 MHz +/-5MHz

Nominal Impedance

50 Ohms nominal

VSWR

2.0 Max. in band

Peak Gain

4.0 dBi min. @ zenith

Minimum Gain

1 dBi @ 10 degrees elevation

Pattern Type

Hemispherical

Polarization

Circular RHCP

LNA Gain

26 dB +/-2 dB
DC Voltage: 3–5VDC

Out of Band Attenuation

20 dB min. at 1575+ / -50MHz

Max. Input Power

20 mA max @ 3.3VDC +/-.3VDC

Operating Temperature

-40° C to +85° C

IP Code Rating

IP67 (Outdoor use)

Wind Speed Rating

165 MPH

Compliance

RoHS

WiFi Antenna Specifications

 

Specification
Value

Dimensions

9.0 x 1.2 x 0.6 inches (229 x 30.5 x 15 mm)

Weight

1.73 ounces (49 grams)

Connector

TNC male

Frequency

698 to 806 MHz
824 to 894 MHz
880 to 960 MHz
1710 to 1880 MHz
1850 to 1990 MHz
1920 to 2170MHz
2100 to 2500 MHz
2500 to 2690 MHz

Nominal Impedance

50 ohms

VSWR

< 2.5:1

Peak Gain

0.5 dBi (698-960 MHz)
2.2 dBi (1710-2700 MHz)

Average Efficiency

55% (698-960 MHz)
73% (1710- 2700 MHz)

Polarization

Linear

Max. Input Power

3W

Operating Temperature

-35° C to +70° C

Compliance

RoHS