Low-frequency antenna array phase measuring method and device based on GPS (global positioning system) and phase detecting chips

A technology of phase detection and phase measurement, which is applied to measuring devices, measuring electrical variables, phase angles between voltage and current, etc., can solve the problems that the antenna array pattern cannot be obtained, cannot be overcome, and errors cannot be eliminated. The effect of natural environment understanding, convenient data collection and analysis

Active Publication Date: 2013-09-18
YUNNAN UNIV +1
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Problems solved by technology

[0009] Among them, Δδ env For the influence of the natural environment on the weight vector of the entire antenna array, this parameter must be corrected, otherwise the ideal pattern of the antenna array cannot be obtained
[0010] The traditional method is to correct Δδ by measuring the current temperature, humidity and other information, and through the empirical value of the change of the cable material at different temperatures and humidity env , this method cannot overcome the influence of other electronic components, such as: front-end amplifiers, phase shifters and RF connectors, and the errors introduced by empirical values ​​cannot be eliminated

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  • Low-frequency antenna array phase measuring method and device based on GPS (global positioning system) and phase detecting chips
  • Low-frequency antenna array phase measuring method and device based on GPS (global positioning system) and phase detecting chips
  • Low-frequency antenna array phase measuring method and device based on GPS (global positioning system) and phase detecting chips

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[0034] A low-frequency antenna array phase measurement method based on GPS and a phase detection chip. The invention takes the antenna array receiving link as a whole, and uses the GPS time signal as the initial control signal for the array element calibration signal, so that each antenna unit At the same time, a coherent signal with the same phase is input; after the signal has gone through the entire receiving analog chain, the phase difference between the two links is detected by the phase detection system Δδ It is converted into a voltage difference Δv, and the voltage difference is collected through a high-precision data acquisition card, and converted into a potential difference in the software. Subtract the original phase difference δ 0 , that is, the current phase difference change due to conditions such as temperature, humidity, and deformation can be known, so that it can be corrected at the software or phase shifter.

[0035] The present invention is characterized ...

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Abstract

The invention discloses a low-frequency antenna array phase measuring method and device based on GPS (global positioning system) and phase detecting chips. The method includes: using a time signal in GPS as an initial signal of information source control, controlling a control circuit of each calibration signal in an antenna array to configure initial output phase information of each signal output chip, and synchronously authorizing same-time, same-phase and same-frequency output of the calibration signal of each unit antenna in the antenna array to allow multiple calibration signals to become coherent signals. The device comprises a GPS signal receiving circuit, a signal generating and control circuit and a phase difference detecting and comparison circuit. The method and the device are efficient, high in precision and independent of empirical value.

Description

technical field [0001] The invention relates to a radio astronomy observation and measurement method and its device, in particular to the technical field of digital signal analysis and processing methods suitable for radio astronomy low-frequency antenna arrays. Background technique [0002] The low-frequency radio antenna array has the characteristics of large antenna volume and wide distribution area. The signals received from each antenna unit are initially amplified by low-noise amplifiers, weighted by numerical control phase shifters to form a comprehensive pattern, and then multi-channel signals are transmitted by long cables. to a fixed point for pooling and digital quantification. Among them, the pattern formed by weighting through the digitally controlled phase shifter is the core of the entire phased array. Different weighting functions enable the antenna array to observe different sky areas. The schematic diagram of the prior art process is shown in Figure 5 . ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R25/00
Inventor 董亮柏正尧何乐生汪敏王威廉施硕彪
Owner YUNNAN UNIV
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