Huawei RTN 320 RTN320 Antenna Specification

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Antennas

Radio equipment uses parabolic antennas to emit and receive electromagnetic waves. The antennas that are described in this document are parabolic antennas compatible with RTN 320s.

Types

Antennas are classified into single-polarized antennas and dual-polarized antennas.

  • Single-polarized antennas emit or receive electromagnetic waves in a specific polarization direction. A single-polarized antenna provides a feed port, which can be set to vertically or horizontally polarized.Single-polarized antennas can also be classified into directly mounted antennas and separately mounted antennas based on how RTN 320s are installed. Single-polarized antennas with diameters of 1.8 meters or less support both direct and separate mounting, whereas those with diameters of more than 1.8 meters support only separate mounting.Figure 1 and Figure 2 show the feeds of single-polarized antennas.Figure 1 Feed of a single-polarized antenna with a diameter of 1.8 meters or less 

    Figure 2 Feed of a single-polarized antenna with a diameter more than 1.8 meters 

  • Dual-polarized antennas concurrently emit or receive vertically and horizontally polarized electromagnetic waves. Dual-polarized antennas can also be classified into directly mounted antennas and separately mounted antennas based on how RTN 320s are installed.Figure 3 and Figure 4 show the feeds of dual-polarized antennas.Figure 3 Feed of a separately mounted, dual-polarized antenna 

    Figure 4 Feed of a directly mounted, dual-polarized antenna 

Functions and Features

Antennas perform conversion between RF signals received from RTN 320s and electromagnetic waves radiated in free space.

  • In the transmit direction, antennas convert RF signals received from RTN 320s into directional electromagnetic waves and emit these waves into free space.
  • In the receive direction, antennas receive electromagnetic waves from free space, convert these waves into RF signals, and transmit the RF signals to RTN 320s.

Working Principles

An antenna consists of a reflector, a feed, a radome, a shield, and a mounting bracket.

Figure 1 shows the structure of an antenna.

 NOTE:

This section considers a single-polarized antenna as an example. A dual-polarized antenna has two feed ports and can concurrently transmit electromagnetic waves in both the vertical and horizontal polarization directions. The working principles of each component of a dual-polarized antenna are almost the same as those of its counterpart of a single-polarized antenna.Figure 1 Antenna structure 

1. Feed 2. Reflector 3. Shield
4. Radome 5. Mounting bracket  

The functions of each component of an antenna are described as follows:

  • FeedsA feed receives RF signals from an RTN 320 at its input port and transmits those signals to its output port through its waveguide. Located at the focal spot of the reflector, the output port of the feed is equivalent to a double reflector antenna and emits electromagnetic waves towards the reflector.You can rotate the feed to change the polarization direction of an antenna. Here, polarization direction refers to the polarization direction of emitted electromagnetic waves or the direction of an electrical field. Figure 2 shows the polarization directions that rectangular waveguides support. NOTE:Antennas must have the same polarization directions as their connected RTN 320s or hybrid couplers. Antennas of certain types use feeds with round waveguides. To adjust the polarization directions of these antennas, follow their installation instructions and check their polarization marks.Figure 2 Polarization directions that rectangular waveguides support 
  • ReflectorsGenerally taking the form of rotatable paraboloids, antenna reflectors reflect electromagnetic waves and increase directive gain.
    • In the transmit direction, reflectors reflect the electromagnetic waves emitted from feeds so the reflected electromagnetic waves are directional.
    • In the receive direction, reflectors focus the electromagnetic waves from free space to feeds' output ports.
  • RadomesRadomes protect antennas from being damaged by wind, rain, snow, or ice. Radomes do not prevent electromagnetic waves from penetrating to the reflector.
  • ShieldsShields are installed on high-performance antennas and help prevent side-lobe radiation.
  • Mounting bracketsMounting brackets are used to attach antennas onto poles and help achieve fine elevation and azimuth adjustments. Large antennas generally require reinforcing rods in addition to mounting brackets. For details, see specific antenna documentation.

Antenna Diameters

Antennas of different types or operating at different frequency bands are available in a wide variety of diameters.

 NOTE:This section provides the antenna diameters corresponding to certain frequency bands supported by the ODU integrated in the RTN 320. For the antenna diameters corresponding to all frequency bands supported by the extended ODU, see RTN XMC ODU Hardware Description.

Table 1 to Table 3 list diameters that antennas of different types support. "Yes" indicates that the corresponding antenna diameter is supported. "NA" indicates that the corresponding antenna diameter is not supported.

Frequency Band Antenna Diameter
0.2 m 0.3 m 0.6 m 0.9 m 1.0 m 1.2 m 1.8 m 2.4 m 3.0 m 3.7 m
7/8 GHz NA NA Y Y Y Y Y Y Y Y
11 GHz NA Y Y Y Y Y Y Y Y NA
13 GHz NA Y Y Y Y Y Y Y Y NA
15 GHz NA Y Y Y Y Y Y NA NA NA
18 GHz NA Y Y Y Y Y Y NA NA NA
23 GHz Y Y Y Y Y Y Y NA NA NA
26 GHz Y Y Y Y Y Y NA NA NA NA
28 GHz NA Y Y NA NA NA NA NA NA NA
32 GHz NA Y Y NA NA NA NA NA NA NA
38 GHz Y Y Y NA NA NA NA NA NA NA

Frequency Band Antenna Diameter
0.3 m 0.6 m 0.9 m 1.0 m 1.2 m 1.8 m 2.4 m 3.0 m 3.7 m
7/8 GHz NA Y Y Y Y Y Y Y Y
11 GHz NA Y Y Y Y Y Y Y Y
13 GHz NA Y Y Y Y Y Y Y Y
15 GHz NA Y Y Y Y Y NA NA NA
18 GHz NA Y Y Y Y Y NA NA NA
23 GHz NA Y Y Y Y Y NA NA NA
26 GHz Y Y Y Y Y NA NA NA NA
28 GHz Y Y NA NA NA NA NA NA NA
32 GHz Y Y NA NA NA NA NA NA NA
38 GHz Y Y NA NA NA NA NA NA NA

Frequency Band Antenna Diameter
0.3 m 0.6 m 0.9 m 1.0 m 1.2 m 1.8 m
7/8 GHz NA Y Y Y Y Y
11 GHz NA Y Y Y Y Y
13 GHz Y Y Y Y Y Y
15 GHz Y Y Y Y Y Y
18 GHz Y Y Y Y Y Y
23 GHz Y Y Y Y Y Y
26 GHz Y Y Y Y Y NA
28 GHz Y Y NA NA NA NA
32 GHz Y Y NA NA NA NA
38 GHz Y Y NA NA NA NA

Technical Specifications

The technical specifications of antennas include electrical and mechanical specifications. The electrical specifications of antennas include the antenna gain, half-power beamwidth, standing wave ratio, and front-to-back ratio. The mechanical specifications of antennas include the dimensions, weight, anti-wind capability, and anti-snow/ice capability.

Huawei provides complete antenna portfolios. For information about antenna specifications, contact Huawei.

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