13 27010904 Outdoor 2.4 GHz Dual-Polarized Directional Antenna (H30 V30 G14)
13.1 Technical Parameters
27010904 directional antennas are applicable in outdoor scenarios.
Antenna Appearance
Technical Specifications
Table 13-1 lists technical specifications of the 27010219 directional antenna.
|
Item |
Value |
|---|---|
|
Frequency (MHz) |
2400–2500 |
|
Gain (dBi) |
14 |
|
Coverage distance (m) |
300 |
|
Horizontal lobe width (degrees) |
30 |
|
Vertical lobe width (degrees) |
30 |
|
Standing wave ratio (SWR) |
≤ 1.5 |
|
Polarization |
Cross polarization |
|
Connector |
2 x N-female |
|
Dimensions (mm) |
H x W x D: 250×250×25 |
|
Weight (kg) |
0.6 |
|
Support pole diameter (mm) |
φ30–φ114 |
|
Mounting mode |
Pole mounting |
|
Applicable AP |
AP6510DN, AP6610DN, and AP8130DN |
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.
- The coverage distance is a reference value in certain conditions. Plan an appropriate distance value according to planning experience, local standards, and onsite environments.
-
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.
Antenna Pattern
13.2 Safety Precautions
13.2.1 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.
13.2.2 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:
13.2.3 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.
13.3 Installation Precautions
- Install the antenna upright and place one side of the RF cable connector towards the ground.
- When installing single-polarized antennas, keep the distance between two antennas to within 30 cm to 50 cm.
- Install the antenna away from metal obstructions, such as air conditioners or heating pipes. Do not install the antenna on a wire mesh.
- Wall materials and thickness determine the number of walls that radio signals can pass through. Factor that into antenna selection.
- Install lightening rods for outdoor antennas to prevent lightening strikes. For details on how to install a lightening rod, see section "Antenna Installation".
-
Ensure that no obstacle exists in the Fresnel zone in bridging scenarios. That is, the antenna height must be large than the sum of the radius of the first Fresnel zone and obstacle height.
Fresnel zones differ depending on the Fresnel zone radius. In a free space, radio signals are mainly transmitted between antennas in the first Fresnel zone. In normal cases, the Fresnel zone refers to the first Fresnel zone.
The radius of the first Fresnel zone is calculated and related parameters are described as follows:
- r: indicates the radius of the first Fresnel zone, in meters.
- d: indicates the distance between two antennas, in km.
- f: indicates the signal frequency, in GHz.
With 5 GHz signals as an example, Table 13-2 lists the radius of the first Fresnel zone in different backhaul distances.
13.4 Antenna Installation
The 27010904 antenna is an outdoor 2.4 GHz directional antenna. To obtain a better performance and wider coverage, the antenna should be installed at high positions away from metal obstacles, for example, building tops, mountaintops, and tower tops. Its transmit end should not be blocked by obstacles.
13.4.1 Accessories and Tools
- 1 x 10 mm combination wrench
- 1 x inclinometer
- 1 x pole with a diameter of φ30 mm to φ114 mm
Antenna support assembly:
- Installation bracket: 1 PCS
- Toothed clamp: 1 PCS
- U-type bolt: 1 PCS
13.4.2 Pole Mounting
The 27010904 antenna is mounted on a pole. The wall thickness of the pole should be no less than 2.5 mm. A 50 mm diameter pole made of round steel is usually used.
CAUTION:
- The antenna must be installed in a place far away from high-voltage power supplies or radio signal interference sources (such as other APs or antennas).
- Do not install antennas in bad weather conditions, for example, during rain, snow, or strong winds.
Fixing the Antenna to the Pole
- Fix the installation bracket to the antenna using the nut, spring washer, and flat washer.
- Secure the installation bracket, toothed clamp and U-type bolt on the pole. Thread the U-type bolt through the fixing hole and graduated bracket and then tighten screws, nuts, flat washers, and spring washers on both ends of the U-type bolt, as shown in the following figure (not tightly).
- Adjust the mechanical downtilt angle using one of the following two methods.
- Method 1: Adjust the angle by sliding the U-type bolt along the bracket. The pole must be kept vertical.
- Method 2: Use the inclinometer to determine the antenna angle. Then, move the antenna to adjust its angle until the bead in the inclinometer is at the middle. This method provides precise measurements.
- Finally, tighten all nuts. The recommended torque is 12 N•m for M6 nuts.
If the required downtilt angle is fixed, you can thread the U-type bolt through the fixing hole and graduated bracket and then tighten the nuts. The antenna support must be kept vertical.
Installing the Pole and Lightning Rod
- Weld the lightning rod to the top of the antenna pole.
- Install the antenna pole on a parapet or concrete bed on the roof of the building.
- Use a 40 mm x 4 mm flat piece of steel to connect the antenna pole to an earth mat.
- Secure the outdoor directional antenna to the pole using an antenna support.
- Keep the pole vertical during the installation.
- If the roof of the building is surrounded by parapets of no less than 1.2 m high, fix the pole on a parapet with expansion screws, and then fix the outdoor directional antenna on the pole with an antenna support.
- If the roof of the building is surrounded by parapets of less than 1.2 m high, fix one of the installation points of the pole on a parapet and the other installation point to the roof with expansion screws, and then fix the outdoor directional antenna to the pole with an antenna support.
- If there are no parapets around the roof, fix the pole to the ground or a concrete bed with expansion screws and steel wires, and then fix the outdoor directional antenna on the pole with an antenna support.
The following figure shows the protection area of a lightening rod. The entire antenna must be within the protection area.
NOTE:
Outdoor AP Installation Scenarios
Figure 13-5 shows outdoor AP installation scenarios. The distance between a 2.4 GHz antenna and a 5 GHz antenna must be more than 0.5 m.
13.4.3 Connecting RF Cables
RF Cable Connection Requirements
Connect the feeder connector to the radio interface of an AP and tighten the connector to the interface. The requirements on connections between the AP's radio interfaces and antenna feeder cables are as follows:
- The feeder interfaces of an antenna must be connected to radio interfaces A and B of the same frequency band on an AP.
- The AP's radio interfaces working on the same frequency band (interface A and interface B) must be connected to feeder interfaces of different polarization directions.
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
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.
