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The paper describes the method in calibrating field strength probes in pulse modulation applications such as radar. Using pulse modulated signal, a standard field is produced in the field standard system and field probes performance is tested in the standard field. The difference of correct factors about the electric field probe is very big between in pulse modulation signal excitation and in sine...
In this letter, we show by the theoretical analysis and computer simulation that the polarization of microstrip antenna can be changed using metamaterial with homogeneous constitutive parameters by applying the transformation optics approach, which is used to design the invisible cloak. We demonstrate that, the distribution of electric field between patch and ground-plane will be altered by filling...
Based on the physical principle of D-dot electric field sensors, integration is indispensable to recover the measured electric field. As integrators are not applicable under certain conditions and the offset in numerical integration is vital to the pulse measurement results, it is necessary to compensate the offset in software integration of a D-dot electric sensor measurement. This paper presented...
We propose a ultra-wideband polarization conversion metasurface composed of copper sheet-backed asymmetric V-shaped resonators. The ultra-wideband polarization convertibility is resulted from multiple resonances of the V-shaped resonators. The simulation results show that the polarization conversion ratio (PCR) is nearly 100% for both x-and y-polarized normally incident EM waves at the four resonance...
Ordinary active frequency selective surface (AFSS) was thought to consist of slots etched on one side of a substrate, with the biasing circuit on the other side. In this paper, a new AFSS without biasing circuit is proposed, the inductive voltage produced by incident wave become bias control signal of the lumped active device. Simulation result shows that the FSS resonant at 3GHz (with tiny insert...
Main interference sources for electro-magnetic sensitive system in submarine platform are usually LF (low-frequency) electromagnetic radiator like high-power cable or cabinet in cabin. The characteristic and problem of radiated EME (electromagnetic environment) from cable and cabinet was analyzed, and a hybrid simulation method of EME from cable based on MoM (method of moments) and MTL (methods of...
The characteristic parameters of lightning electromagnetic pulse field (LEMP), such as peak values, time derivatives, power flow and energy density, are essential for LEMP shielding and remote sensing. In this paper, an novel approach based on finite difference time-domain (FDTD) method is demonstrated. For this new method avoids huge amount of storage when computing the distribution of LEMP in large...
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