Satellite RF Receiver with Adjustable Bandwidth Filter
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Solution Overview
Problem
Current satellite radiofrequency signal receivers lack the ability to accurately determine the power spectrum of signals across their entire operating frequency range, as traditional methods either require bulky and expensive spectrum analyzers on board or cannot analyze signals between frequency bands when using ground-based analysis.
Innovation Solution
A frequency-flexible radiofrequency signal receiver with adjustable filtering and power acquisition capabilities, allowing for continuous measurement of signal power across the operating frequency range by scanning with different resolutions and adjusting the filter bandwidth, eliminating the need for a dedicated spectrum analyzer on board the satellite.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a spectrum analyzer is installed on board the satellite, then the power spectrum of received signals can be accurately measured across the entire operating frequency range, but the volume and complexity of equipment on the satellite increase significantly
Solution Approach 1:
The existing radiofrequency signal receiver is made multi-functional by adding the filtering assembly and power acquisition means, enabling it to perform both its original signal reception function and the additional function of power spectrum measurement, thereby eliminating the need for a separate spectrum analyzer
Solution Approach 2:
The spectrum measurement function is merged with the existing receiver by integrating the filtering assembly and power acquisition means into the receiver's signal processing chain, combining multiple functions into a single device to reduce overall equipment volume
2Volume of stationary object
If ground-based analysis of repeater signals is used, then equipment volume on the satellite is reduced, but the power spectrum cannot be measured between frequency bands
Solution Approach 1:
The filtering assembly is designed with adjustable bandwidth capability, allowing it to dynamically adapt its passband width to match different analysis band requirements, enabling continuous spectrum measurement across the entire operating frequency range including between frequency bands
Solution Approach 2:
The system changes the bandwidth parameter of the filtering assembly to take values from a set including a first bandwidth equal to a pitch for scanning the operating frequency range, enabling flexible measurement of power spectrum across different frequency ranges including gaps between bands
3Device complexity
If the filter bandwidth is fixed, then the device complexity is reduced, but the ability to perform spectrum analysis with different resolutions is limited
Solution Approach 1:
The filtering assembly incorporates adjustable bandwidth capability with adjustment means that can set the bandwidth to different values from a predefined set, allowing the system to adapt to different spectrum analysis resolution requirements while maintaining manageable device complexity through discrete bandwidth options
Data Source
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AI summary
The invention relates to a radiofrequency signal receiver (1) to be provided on a satellite, including: a control device (100), at the frequency of the receiver, which enables the reception frequency of the receiver to be controlled on the basis of a frequency command (104); a band-pass filter-type filtering assembly comprising a band-pass, referred to as the filtering assembly band-pass, having a controllable bandwidth capable of having a set of values, the filtering assembly (107) enabling the bandwidth of a first signal (S1) to be limited, said first signal representing the input signal of the receiver at the bandwidth of the filtering assembly; a control means enabling the band-pass width of the filtering assembly to be controlled on the basis of a filtering bandwidth command; and a means (111) for acquiring power enabling a measurement of the strength of the first signal to be output, at the output of same from the filtering assembly (107).