Optical LNB Fast Position-Adjusting via IF Extraction
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Solution Overview
Problem
The existing satellite communication receiving systems face difficulties in position-adjusting due to the lack of a power source at installation locations, prolonging the installation time as they require power from the interior of a building for the MDU to convert optical signals to electrical signals for position verification.
Innovation Solution
An optical Low Noise Block Down-converter (LNB) with a down-converting device, Orthomode Transducer (OMT), branching device, and electrical/optical converting device that directly outputs Intermediate Frequency (IF) signals through a coaxial cable, eliminating the need for an MDU for optical/electrical conversion, allowing engineers to verify the dish antenna's position without additional power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an MDU is used to convert optical signals to electrical signals for position verification, then the position-adjusting function can be achieved, but additional power source requirement increases installation complexity and time
Solution Approach 1:
The patent extracts the IF signal output function from the optical conversion path and provides it directly through the power end coaxial cable. This separates the position verification function from the optical conversion system, eliminating the need for MDU and its power source during installation.
Solution Approach 2:
The power end coaxial cable is given dual functionality: it serves both as the power supply line for the LNB and as the signal transmission line for IF signals. This multi-functionality eliminates the need for separate signal cables and power sources during position-adjusting.
2Productivity
If power is sourced from the interior of the building for the MDU, then the MDU can operate for signal conversion, but installation time is prolonged due to additional wiring requirements
Solution Approach 1:
The patent merges the power transmission and signal transmission functions into a single coaxial cable (the power end cable). This combination eliminates the need for separate power wiring and signal wiring, significantly reducing installation time and improving productivity.
3Ease of operation
If optical signals are converted to electrical signals through an MDU, then signal transmission can be achieved, but the system requires additional equipment and power sources
Solution Approach 1:
The patent extracts the IF signal from the optical conversion process and provides it directly through the existing power cable infrastructure. This removes the MDU equipment from the system, simplifying the overall equipment requirements while maintaining position verification capability.
Solution Approach 2:
The power end coaxial cable acts as an intermediary that simultaneously carries both power and IF signals. This single cable mediates between the LNB and the receiving equipment, eliminating the need for separate optical-to-electrical conversion equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates faster and more convenient position-adjusting of satellite communication systems by enabling direct IF signal output through the coaxial cable, reducing installation time and eliminating the need for internal power sourcing.
Implementation Method 1
a down-converting device, coupled to an Orthomode Transducer (OMT) of the LNBF, for down-converting a polarized signal so as to generate a first Intermediate Frequency (IF) signal
Implementation Method 2
an electrical/optical converting device, coupled to the branching device, for converting the second IF signal to an optical signal
Implementation Method 3
an Orthomode Transducer (OMT) of the LNBF
Data Source
AI summary
An optical LNB capable of fast position-adjusting is employed in an LNBF. The optical LNB includes a down-converting device coupled to an OMT of the LNBF for down-converting a polarized signal for generating a first intermediate frequency signal, a branching device for branching the first intermediate frequency signal for generating a second and a third intermediate frequency signals, an electrical/optical converting device coupled to the branching device for converting the second intermediate frequency signal into an optical signal, and a power end for receiving power from a power supply and outputting the third intermediate frequency signal.