- 标题
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DESIGN AND REALIZATION OF CIRCULAR POLARIZED SIW SLOT ARRAY ANTENNA FOR CUBESAT INTERSATELLITE LINKS
摘要： This paper presents the design and fabrication of an antenna based on Substrate Integrated Waveguide (SIW) for intersatellite crosslinks in C-band. The entire antenna consists of two elements of SIW slots array that is fed by a hybrid 3 dB directional coupler. The entire SIW slots array antenna is circularly polarized (CP), and each element has four longitudinal slots. The element’s e?ective ?eld matching is realized with a microstrip to SIW transition. The antenna design has been evaluated with its return loss, gain plot, and radiation pattern characteristics to validate the fabricated antenna. The fabricated prototype antenna radiates a left-handed circularly polarized (LHCP) electromagnetic wave with the peak gain of 5 dB and o?ers approximately 2% AR bandwidth around 5 GHz.
关键词： circularly polarized (CP),intersatellite links,slot array antenna,CubeSat,Substrate Integrated Waveguide (SIW)
更新于2025-09-23 15:21:01
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[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Cumulative Amplifier and Doppler Effect on PSK modulated signals in Inter-Satellite Communication
摘要： The paper brings out the cumulative effect of Doppler frequencies on Saleh type non-linearity for a PSK (Phase Shift Keying) modulated signal in Intersatellite communication link. The distortion introduced is measured by taking Error Vector Magnitude (EVM) as metric of evaluation. A PSK modulated signal is considered for study and the equation for the EVM is derived for the PSK signal affected with Doppler and Saleh type non-linearity. The Intersatellite links to be employed for the proposed constellation get affected with Doppler. The Doppler frequency changes with the frequency of operating signal. In this paper a time invariant Doppler is considered and its effect on the PSK signal is brought out. The PSK type considered is QPSK and the effect of amplifier linearity is first derived and then the effect of Doppler is applied onto it. The EVM expression derived is the power reference the EVM expression results are presented for variation of EVM with doppler frequency. From the results it can be observed that a) The EVM varies non-periodically with the Doppler frequency. b) The EVM value changes for different Saleh Parameters and changes with the Doppler frequency. The EVM values are found to worse for Saleh parameters that have higher values of slope in the amplifier characteristics.
关键词： Saleh model non-linearity,Cube Satellite-microsatellite constellation,Doppler and Phase error,Intersatellite Links
更新于2025-09-19 17:15:36