29 27012048 Rail Transportation 2.4 GHz Dual-Polarized Directional Antenna (H35 V35 G12)
29.1 Technical Parameters
The 27012048 directional antenna can be used for vehicle-ground communication scenarios.
Antenna Appearance
Technical Specifications
Table 29-1 lists technical specifications of the 27012048 antenna.
|
Item |
Value |
|---|---|
|
Frequency (MHz) |
2400-2500 |
|
Gain (dBi) |
12 |
|
Horizontal lobe width (degree) |
35 |
|
Vertical lobe width (degree) |
35 |
|
Standing wave ratio (SWR) |
≤ 2 |
|
Polarization |
Vertical and horizontal polarization |
|
Connector |
2 x N-female |
|
Dimensions (mm) |
Diameter x Length: φ84 x 385 |
|
Weight (g) |
1220 |
|
Support pole diameter (mm) |
φ25-φ50 |
|
Mounting mode |
Wall mounting |
|
Applicable AP |
AP8130DN/AP9131DN/AP9132DN |
NOTE:
- The gains and lobe widths in this document are typical values. The actual values are within a range. For specifications, see the corresponding data sheets.
-
There may be differences in the standards of different countries, so the mapping between antennas and APs shall comply with local standards. For details, refer to device access authentication information.
29.2 Safety Precautions
29.2.1 General Safety Precautions
This section describes safety precautions that instruct you to select measuring and testing instruments when you install, operate, and maintain Huawei equipment.
All Safety Precautions
To ensure human safety and equipment safety, comply with all the safety precautions marked on the equipment and instructed in this document.
WARNING, CAUTION, and DANGER items in this document do not cover all the safety cautions and are only supplementary to the safety cautions.
Local Laws and Regulations
When operating a device, abide by local laws and regulations. The safety precautions instructed in the document are supplementary to the local laws and regulations.
Basic Installation Requirements
Only trained and qualified personnel are allowed to install or maintain Huawei equipment. Familiarize yourself with all safety precautions before performing any operation on the equipment.
- Only the trained and qualified personnel are permitted to install, operate, and maintain Huawei equipment.
- Only the qualified personnel are permitted to dismantle safety appliances and repair Huawei equipment.
- Only the personnel certified or authorized by Huawei are permitted to replace or change Huawei equipment or parts of Huawei equipment (including software).
- The operating personnel must immediately report the faults or errors that may cause safety problems to the person in charge.
Grounding Requirements
Equipment that needs to be grounded must meet the following requirements:
- When installing the equipment, ground the equipment before any operations and remove the ground cable only after you remove all the other components and cables from the equipment.
- Ensure that the ground conductor is intact.
- Do not operate the equipment in the absence of a suitably installed ground conductor.
- The equipment must be connected to the PGND permanently. Before operating the equipment, check the electrical connections of the equipment and ensure that the equipment is properly grounded.
Personal Safety
- Do not operate the equipment and cables in a thunderstorm.
- To avoid electric shocks, do not connect safety extra-low voltage (SELV) circuits to telecommunication network voltage (TNV) circuits.
- Invisible laser beams will cause eye damage. Do not look into bores of optical modules or connectors of optical fibers without eye protection.
- Before performing any operation on the equipment, wear ESD clothing and ESD gloves or an ESD wrist strap. Remove conductive objects like jewelry and watches to avoid electric shock or burn.
- In case of fire, immediately leave the building or equipment deployment site and press the fire alarm button or call the fire department. Never enter the building on fire again in any situation.
Equipment Safety
- Before any operation, install the equipment firmly on the ground or other rigid objects, such as on a wall or in a rack.
- When the system is working, ensure that the ventilation hole is not blocked.
- When installing panels, use necessary tools to fasten the screws.
- After equipment installation is complete, clean up the packing materials.
29.2.2 Electrical Safety Precautions
This section describes safety precautions for high voltage, thunderstorms, high leakage current, power cables, and fuses.
High Voltage
DANGER:
- Direct contact with a high-voltage power source or indirect contact through damp objects can be fatal.
- Misoperations on high-voltage facilities may result in fire, electric shock, or other accidents.
High Leakage Current
CAUTION:
If a high leakage current mark is labeled near the power connector of the equipment, you must connect the PGND terminal on the shell to the ground before connecting the equipment to an AC input power supply. This is to prevent the electric shock caused by leakage current of the equipment.
Power Cable
DANGER:
- Before installing or removing power cables, you must power off the equipment.
- Before connecting a power cable, verify that the label on the power cable is correct.
Fuses
CAUTION:
29.2.3 Working at Heights
This section describes safety precautions you need to take when working at heights.
CAUTION:
The requirements for working at heights are as follows:
- The personnel who work at heights must be trained.
- Carry and handle the operating machines and tools with caution to prevent them from falling down.
29.3 Antenna Installation
The 27012048 antenna is a directional antenna. It can be installed on an inner wall of a tunnel and in vehicle-ground backhaul scenarios.
29.3.1 Accessories and Tools
The following accessories and tools are required for installing the 27012048 antenna.
29.3.2 Wall mounting
Precautions
Pay attention to the following points when installing this antenna:
- The distance between the installation height and the height of antennas of vehicle-mounted APs is less than 30 cm. It is recommended that it be installed at a position 20 cm higher than the antennas of vehicle-mounted APs.
- The tubular central axis of the antenna is horizontally paralleled with the rails and the angle between the antenna and wall is less than 1°. Do not incline the antenna towards the wall.
- If you customize mounting brackets, ensure that the distance between the central axis of the antenna and the installation wall is no less than 15 cm.
Wall mounting
- Fix the mounting bracket to the wall, adjust the installation position using a level, and mark positions of four mounting holes.
- Use a hammer drill to drill holes at the four marked positions. Screw the nut into the expansion bolt, hammer the expansion bolt into a hole until the flat washer is closely attached to the wall. Remove the nut, spring washer, and flat washer in order.
- Fix the antenna onto the mounting bracket, fit flat washers, spring washers, and nuts in order, and tighten the nuts (the tightening torque is 5 N•m). Stretch the feeder port out of the hole of the mounting bracket.
- Pinch the mounting bracket on the expansion bolts, fit flat washers, spring washers, and nuts in order, and tighten the nuts (the tightening torque is 5 N•m).
29.3.3 Connecting RF Cables
RF Cable Connection
Connect the feeder connector to the radio interface of an AP using an RF transit cable (sold separately) and tighten the connector to the interface. A 1 N•m tightening torque is recommended for the type-N connector.
The following table lists the RF transit cables and connectors used.
|
AP Type |
Coaxial Cable |
Coaxial Connector |
Appearance |
|---|---|---|---|
|
AP8130DN |
RG-8U cable (25070009) |
Type-N male connector (14040184) |
|
|
1/2" (inch) super-flexible cable (25070076) |
Type-N male connector (14040150) |
| |
|
AP9131DN/AP9132DN |
RF transit cable (04130714 or 04130714-001) connecting a QMA male connector to a type-N male connector. |
- (No cable needs to be made onsite.) |
NOTE:
The length of 04130714 cable is 0.5 m, while the length of 04130714–001 cable is 3 m. |
The requirements on connections between the antenna and the AP's radio interfaces are as follows:
|
AP Model |
Principle for RF Cable Connection |
|---|---|
|
AP8130DN |
|
|
AP9131DN |
Two ports on the antenna are connected to radio interfaces 2.4G/5G-B and 2.4G/5G-C of the AP, and an RF load should be connected to radio interface 2.4G/5G-A of the AP. |
|
AP9132DN |
|
Take the AP9131DN as an example. The following figure shows the RF cable connection on the AP9131DN.
RF Cable Deployment Requirements
- Use a short feeder cable to connect the antenna to an AP.
- It is recommended that you connect a 50 ohm RF load to an idle antenna interface and wrap the RF load with both the insulation and waterproof tape.
- Wrap the RF cable in single-layer PVC insulation tape, triple-layer waterproof tape, and then triple-layer PVC insulation tape.
- Before wrapping the waterproof tape, stretch the tape evenly until it is 1/2 the width as before. With each layer of tape wrap the cable tightly and ensure that each layer covers more than 50% of the layer beneath it.
- Wrap the triple-layer tape from bottom to top, from top to bottom, and then from bottom to top again.
- Bend radius requirements: RG-8U RF cable: > 150 mm; 1/2" RF cable:> 50 mm; 7/8" RF cable: > 250 mm. One inch (1") equals 25.4 mm.
RF Cable Connections
- Antenna interfaces of Huawei outdoor APs provide a 5 kA surge protection capability. In general, no additional surge protective device needs to be installed, and the RF cables are directly connected to the antenna interfaces.
NOTE:
Outdoor APs support built-in surge protection on all interfaces, but the surge protection works only when the outdoor APs are grounded.
- If a higher surge protection capability is required, you need to purchase a surge protective device separately. When installing the surge protective device, ensure that it is connected to a ground cable.
Instructions on Making RF Cables
When connecting the AP8130DN, you need to assemble the type-N male connector and 1/2" (inch) super-flexible feeder cable onsite in the following way:
Connecting the type-N male coaxial connector to the RG-8U feeder cable
- Peel the cable.
- Install accessories, such as the nut.
- Install the connector body.
- Tighten the connector on the cable.
Connecting the type-N male coaxial connector to the 1/2" feeder cable
- Peel the cable.
- Install the back nut.
- Install the front nut.
- Put the cable through the heat-shrink tubing.
