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A four-port coupler combines and splits four RF signals. The coupler applies to the 3+0/4+0 site scenario, and a single-polarized antenna can transmit a maximum of four RF signals, saving installation space.
Functions and Features
A single-polarized antenna can simultaneously transmit four RF signals using a four-port coupler, saving device deployment costs.
A four-port coupler provides the following functions:
- In the transmit direction, the four-port coupler combines four RF signals into one RF signal and sends the signal to the antenna.
- In the receive direction, the four-port coupler divides the RF signal received from the antenna into four RF signals and sends them to four RF processing devices.
Compared with the two-port coupler, the four-port coupler consists of three balanced couplers. Figure 1 shows the working principle of the four-port coupler.Figure 1 Working principle of the four-port coupler
The four-port coupler is connected to an antenna through separate mounting.Figure 2 Diagram for installing a four-port coupler
The ports of a four-port coupler include an antenna port, two main tributary ports, and two standby tributary ports.
Figure 1 shows the ports of a four-port coupler.Figure 1 Interfaces of a four-port coupler
In actual applications, matched loads must be installed on idle ports.
Table 1 describes the ports of a four-port coupler.
|1||Antenna port||-||Connects to a flexible waveguide.||153IEC-R140, which can be connected to PBR140 (at 15 GHz frequency band)153IEC-R220, which can be connected to PBR220 (at 18/23/26 GHz frequency band)153IEC-R320, which can be connected to PBR320 (at 28/32/38 GHz frequency band)|
|2||Standby tributary port 1/2||STANDBY1-2||Connects to theRTN 320 or theRTN XMC ODU on the standby tributary.|
|3||Main tributary port 1/2||MAIN1-2||Connects to the RTN 320 or the RTN XMC ODU on the main tributary.|
Hybrid coupler labels are attached to both hybrid couplers and the packing boxes. The label is used to provide the basic information of the hybrid coupler.
Figure 1 shows the label of a hybrid coupler.Figure 1 Diagram of a hybrid coupler label
Table 1 describes the parameters in the label.
|Label Information||Example||Parameter||Parameter Description|
|Name||-||Indicates that the component is a hybrid coupler.|
|Model(MODEL)||1: Indicates the component type.||C: Indicates a hybrid coupler.|
|2: Indicates the frequency band.||The operating frequency band (GHz) of a four-port coupler is:15/18/23/26/28/32/38 GHz|
|3: Indicates the branch feature.||B: Indicates the balanced hybrid coupler.Currently, the four-port coupler only supports balanced couplers.|
|4: Indicates the type of an antenna interface.||R: Indicates the rectangular waveguide.Currently, the four-port coupler only supports rectangular waveguides.|
|5: Indicates the type of a waveguide cavity for an ODU interface.||R: Indicates the rectangular waveguide.Currently, the four-port coupler only supports rectangular waveguides.|
|6: Indicates the interface code.||C: Indicates HUAWEI V2 interface (XMC interface).|
|7: Indicates the type of the hybrid coupler.||Q: Indicates the four-port coupler.|
|Code of the hybrid coupler(ITEM)||52440560||-||Identifies the code of the hybrid coupler.|
|Description of the hybrid coupler(DEP)||14.5–15.5 GHz, balance, quarter||14.5–15.5 GHz: Operating frequency range||Indicates the operating frequency range (GHz) of the hybrid coupler.|
|balance: Indicates the branch feature.||Balanced|
|quarter: Indicates the number of interfaces.||Four-port coupler|
|Serial number of the hybrid coupler(S/N)||S/N: 21 52440560 1063000101||-||Identifies each hybrid coupler uniquely.|
|Bar code area||-||Indicates the bar code of the serial number of the hybrid coupler.|
The technical specifications of the four-port coupler include electrical specifications and mechanical specifications.Table 1 shows the technical specifications of the the four-port coupler.
|Type||Frequency Band||Maximum Attenuation of the Main Tributary (dB)||Maximum Attenuation of the Standby Tributary (dB)||Minimum Isolation (dB)||Maximum Standing Wave Ratio||Description of Antenna Interface|
|Balanced Coupler||15 GHz||7.6||7.6||20||1.3||Connects to PBR140.|
|18 GHz||7.6||7.6||20||1.3||Connects to PBR 220.|
|23 GHz||7.6||7.6||20||1.3||Connects to PBR 220.|
|26 GHz||8.2||8.2||20||1.4||Connects to PBR 220.|
|28 GHz||8.2||8.2||20||1.4||Connects to PBR 320.|
|32 GHz||8.2||8.2||20||1.4||Connects to PBR 320.|
|38 GHz||8.2||8.2||20||1.4||Connects to PBR 320.|
|Packing Dimensions (mm)||< 650 x 170 x 260 (length x depth x height)|
|Weight (kg)||≤ 10|
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