A research for influence of temperature on T/R module in radar

Zhong, Ling; Fu, Guicui; Lu, Jiale

doi:10.1109/phm.2015.7380027

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…At present, the infuence of temperature change on the feed current of the T/R module is mainly studied from two aspects: a thermal-electromagnetic analysis based on the circuit model and an experimental test. Zhong et al [86] studied the infuence of temperature on the T/R module of radar, established a simplifed circuit model of the T/R module, and investigated the change of circuit performance with temperature. Yang [87] established the circuit model of the S-band phase shifter and simulated and analysed the amplitude and phase change of the exciting current output by the circuit model at diferent temperatures.…”

Section: Efect Of Element Feed Errormentioning

confidence: 99%

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Wang

et al. 2023

International Journal of Antennas and Propagation

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Active phased array antenna (APAA) is a representative of complex electronic equipment, and it plays significant roles in scenarios such as battlefield situation perception, aviation guidance, and communication. It has become the core equipment in land, navigation, and aeronautical applications. With the continuous improvement of technical changes and military requirements, the working frequency band, pointing accuracy, gain, and low sidelobe level of APAA increase, and the multi-disciplinary design contradiction between antenna electrical performance and structure and temperature becomes increasingly prominent. As a result, the electrical performance of APAA in service is prone to be affected by the external complex environments. The structural-electromagnetic-thermal (SET) coupling problem has become a key problem restricting the development of APAA. This paper has summarized the structural features and environmental loads of advanced APAA on different platforms and provided design basis and principle for antenna designer. And then the SET coupling theory of APAA has been introduced, which can be applied in both the design and manufacturing stage, as well as the performance control technology in service environment of APAA. This theory helps to analyze the impact of environmental factors, such as antenna structure deformation, radome high-temperature ablation, and feed errors, on the antenna's performance. For 128 × 768 spaceborne array antenna, in the range of 25∼85°C, the gain of antenna decreases with the increase of operating temperature and decreases by 0.015 dB with each increase of 1°C. The key design parameters in the fields of antenna manufacturing accuracy, efficient heat dissipation, and lightweight design are also analysed; for 32 × 32 rectangular planar phased array antenna, the gain of antenna decreases by 2.715 dB when the random error of installation position in x, y, and z direction reaches 1/10 of the wavelength. In addition, condition monitoring, displacement field reconstruction, and electrical performance compensation of APAA have also been touched to help engineers maintain and guarantee the antenna performance throughout its life cycle. Finally, the future research direction of SET technology of APAA has been discussed, and SET technology is extended to more fields such as antenna parameter uncertainty, high-frequency circuit electronics manufacturing, and electronic equipment performance guarantee.

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Section: Efect Of Element Feed Errormentioning

confidence: 99%

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Wang

et al. 2023

International Journal of Antennas and Propagation

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“…This directly influences the reflection, transmission, and dispersion behavior of electromagnetic waves. Secondly, the temperature has an influence on the electronics of the sensor itself [12,13]. Due to changing conductivities, temperature-dependent changes also occur in the analog-to-digital converter (ADC) and digital-to-analog converter (DAC).…”

Section: Introductionmentioning

confidence: 99%

Trend Decomposition for Temperature Compensation in a Radar-Based Structural Health Monitoring System of Wind Turbine Blades

Simon,

Moll,

Krozer

2024

Sensors

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The compensation of temperature is critical in every structural health monitoring (SHM) system for achieving maximum damage detection performance. This paper analyses a novel approach based on seasonal trend decomposition to eliminate the temperature effect in a radar-based SHM system for wind turbine blades that operates in the frequency band from 58 to 63.5 GHz. While the original seasonal trend decomposition searches for the trend of a periodic signal in its entirety, the new method uses a moving average to determine trends for each point of a periodic signal. The points of the seasonal signal no longer need to have the same trend. Based on the determined trends, the measurement signal can be corrected by temperature effects, providing accurate damage detection results under changing temperature conditions. The performance of the trend decomposition is demonstrated with experimental data obtained during a full-scale fatigue test of a 31 m long wind turbine blade subjected to ambient temperature variations. For comparison, the well-known optimal baseline selection (OBS) approach is used, which is based on multiple baseline measurements at different temperature conditions. The use of metrics, such as the contrast in damage indicators, enables the performance assessment of both methods.

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“…Wali, R. added varactor-based Schiffman phase shifters to the power divider of a four-element phased array, but the temperature effect was not examined in the paper. Furthermore, analysis has been undertaken of the impact of temperature on the circuits in T/R modules [20]. Temir et al noted that different degrees of heat dissipation and non-uniform cooling mechanisms result in temperature differences for the channels, which may alter the performance of the feeding networks and thus cause uncharacterized phase/amplitude errors [21]; however, this study only provides the curve of the phase and amplitude error with the variation of temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature on Electromagnetic Performance of Active Phased Array Antenna

Wang

Lian

et al. 2020

Electronics

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Active phased array antennas (APAAs) can suffer from the effects of harsh thermal environments, which are caused by the large quantity of power generated by densely packed T/R modules and external thermal impacts. The situation may be worse in the case of limited room and severe thermal loads, due to heat radiation and a low temperature sink. The temperature field of the antenna can be changed. Since large numbers of temperature-sensitive electronic components exist in T/R modules, excitation current output can be significantly affected and the electromagnetic performance of APAAs can be seriously degraded. However, due to a lack of quantitative analysis, it is difficult to directly estimate the effect of temperature on the electromagnetic performance of APAAs. Therefore, this study investigated the electromagnetic performance of APAAs as affected by two key factors—the uniformly distributed temperature field and the temperature gradient field—based on different antenna shapes and sizes, to provide theoretical guidance for their thermal design.

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A research for influence of temperature on T/R module in radar

Cited by 5 publications

References 10 publications

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Trend Decomposition for Temperature Compensation in a Radar-Based Structural Health Monitoring System of Wind Turbine Blades

Effect of Temperature on Electromagnetic Performance of Active Phased Array Antenna

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