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A wideband, low profile frequency selective surface (FSS) is presented for Ku-band (12.4 – 18 GHz). The proposed design is fabricated on two substrates with a total thickness of <λ/10. The complimentary unit cell shape results in a miniaturized FSS design as well as wideband performance. The designed FSS is polarization-independent due to the unit cell symmetry. The simulated results of the proposed...
ESD to a display may upset or damage the display or the touch circuit. The ESD may have a visible spark carrying current to the frame of the mobile device, to the connecting flex cable, or into the display by penetrating the glue between the glass layers. It may also be a sparkless ESD that causes corona charging on the surface of the glass having currents as high as 10 A. A measurement technique...
A new measurement system has been created for investigation of non-contact electrostatic discharge(ESD). An automotive control section of gas pressure was designed to meet the requirement of the new invented ESD measurement system. Experiment result with the new ESD measurement system shown that gas pressure and relative humidity have distinctive effect on peak value, rise/fall time of discharge current...
A two-dimensional emission source microscopy (ESM) algorithm based on the synthetic aperture radar (SAR) technique is used for EMI source localization. The resolution of the ESM method is proportional to the wavelength of electromagnetic radiation, and at the frequency of 1 GHz, the theoretical resolution limit in air is 15 cm which is too coarse for many practical applications. The resolution can...
Optical transceiver modules are commonly used in telecommunication and data communications systems. These modules, which are located in the optical I/O ports at the front-end of switches and routers, are a dominating source of electromagnetic interference (EMI) problems at their operation frequency and/or harmonics. In this study, a simulation model is used to investigate the EMI coupling physics...
RF interference caused by liquid crystal display (LCD) noise modulation in a mobile phone was investigated and its noise coupling path was demonstrated. In the frequency division duplex communications, mobile phones can send (uplink) and receive (downlink) at the same time. When an antenna transmits high power signal, the baseband noise from an LCD panel is modulated into an RF band and causes interference...
In this paper, several methods are outlined for detecting functional changes in an IC due to external interference such as ESD or EMI. The goal is to provide diagnostic tools for detection of potential soft failure susceptibilities of complex systems during the hardware design stage without the aid of any complex software.
A terminal model is a common method to create equivalent models of boost converters in order to predict conducted emissions. In this paper, a characterization board was designed to measure the voltages across and currents flowing into the input side of a DC-DC boost converter automatically by changing the load conditions using the relays as switches. After the equivalent source was determined, the...
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