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This paper proposes the methods of high intensity radiated field (HIRF) testing for civil aircraft. It introduces how to eliminate the background noise and select the frequency list for HIRF testing at first. Then, the method of LLSC calibration and LLSC test is proposed along with an automatic test system of LLSC testing. After that, how to design a mode stirrer and validate the performances of it...
Electromagnetic interference (EMI) suppression becomes more and more prominent in the design of electronic systems, especially in the design of modular systems. An advanced EMI suppression approach for modular systems is proposed in this paper. In this approach, the output spectrum of a system or a module is analyzed and decomposed into several types which are called elements in this paper. Each element...
Electromagnetic environment has become more complex due to the rapid development of modern electronic techniques, and electromagnetic compatibility (EMC) problems caused by outside interference have become a big issue for many devices, and cannot be ignored. To minimize the impact from outer electromagnetic interference, metallic enclosure is widely used as a shield. Therefore, shielding effectiveness...
This paper proposes an on-site fast test system for EMC measurement. It introduces the principle of GTEM cell at first. Then, a novel miniaturized GTEM cell is proposed based on the theory and calculation methods of GTEM cell's characteristic impedance and interior strength of field. It is small in size and convenient to move, specially designed for EMC site fast test. The models of GTEM cell are...
High conductive fiber reinforced composite materials are widely used in several industry applications due to the excellent mechanical properties and good performance of shielding effectiveness. In this paper, equivalent modeling of a dielectric matrix filled in with a square array of long conductive fibers is considered. A modified homogenization model is presented by taking the skin effect into account...
The dipole antennas are widely used for RF communication applications and usually provide a potential front-door path of coupling electromagnetic pulse (EMP). In this paper, the transient current response of dipoles exposed to EMP is calculated with an equivalent circuit based model, which consists of an equivalent pulse voltage source and an antenna equivalent circuit. A center-driven wire dipole...
Ringing signal has widely existed in digital circuits like integrated circuits, DC-DC circuits, etc. The ringing appears in the roads due to the parasitic effect in high frequency or the impedance mismatch, and may cause logical errors in signal processing, as well as electromagnetic interference (EMI) to other devices. To have a deeper understanding of the electromagnetic characteristics, we analyze...
Electromagnetic radiation emission from cable [1] is one of the most important factors to cause electromagnetic compatibility (EMC) problem for the inverter, which may directly lead to the performance degradation or failing to work normally for the device. In this paper, the characteristics of the electromagnetic radiation emission from coaxial cable will be researched by means of simulation and calculation...
In this paper, a novel compact antenna of radio altimeter based on bi-layer substrate is presented, which is composed of bi-layer microwave circuits. A palisade-shaped conductor is placed on the upper substrate to enhance purity of the linear polarization, while a two-unit parallel-fed microstrip antenna array and its feeding network are laid on the lower substrate. This new kind of radio altimeter...
In this paper, a novel 8×8 Butler matrix based on double-layer substrate structure is presented and realized. The double-layer structure is adopted to place components on the up and down layers without crossover. Two-section stepped coupling microstrip Schiffman phase shifters with λg/8 length are used to realize wideband phase shift. A three-branch line coupler is employed as wideband bridge. The...
Purpose To investigate the effect of a monoclonal antibody (CH12), targeted against epidermal growth factor receptor type III variant (EGFRvIII), on human ovarian cancer cells when administered in combination with cisplatin chemotherapy. Methods Western blot and reverse transcription polymerase chain reaction (RT–PCR) were used to determine the expression levels of EGFRvIII protein and mRNA, respectively,...
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