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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Compensation of Radome Effects in Small Airborne Monopulse Arrays by Convex Optimization
摘要： The quality of small array antennas in airborne monopulse systems can be significantly reduced by the radome. We therefore present a convex optimization approach to minimize radome effects in monopulse arrays. This is achieved by using active element patterns in the optimization to determine the excitation weights. Simulation results for a BoR array with 48 elements and an extended hemispherical radome are presented. We demonstrate that it is possible to reduce the side-lobe level by 3.5 dB by taking radome effects into account in the optimization. This approach also results in an increased gain, particularly at large scan angles. Furthermore, the presented approach allows the monopulse slope to be indirectly specified as a design parameter. It is shown that the trade-off between the monopulse slope coefficient and the side-lobe level is approximately linear.
关键词： radomes,airborne ESM,monopulse DOA estimation,convex optimization,phased array antennas
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Chengdu, China (2019.5.21-2019.5.24)] 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Active Frequency Support Control of Energy Storage Power Station Based on Photovoltaic and Energy-storage Microgrid
摘要： When the photovoltaic and energy-storage microgrid(PV-ESM) operate under a conventional droop or virtual synchronous generator(VSG) control, the system frequency will be unstable if the load is disturbed violently. To solve the problem, the feedback loop control strategy of the ESPS with a first order differential control links of high-pass filter is proposed from the aspect of optimizing energy storage power station(ESPS) dynamic power response, and the adaptive selection basis of damping coefficient and inertia time constant is given. An improved VSG frequency adjustment strategy based on feedforward power is proposed in order to support power frequency actively by EPSP power adjustment. Taking a typical off-grid PV-ESM scenario in an industrial park as an example, the simulation results show that the proposed strategy could support frequency recovery rapidly when frequency instability induced by load mutation and ensure the quality of power supply.
关键词： VSG,PV-ESM,Frequency support,Power feed-forward,ESPS
更新于2025-09-16 10:30:52