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Здесь показаны различия между двумя версиями данной страницы.

--- remcom_extra [2020/01/29 09:54]
potapoff
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potapoff
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-Providing Narrowband IoT
+**Providing Narrowband IoT Coverage with Low Earth Orbit Satellites**
-Coverage with Low Earth Orbit
-Satellites
 Kenneth M. O’Hara, Gregory J. Skidmore, MWJ 2019'12
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 [[https://vk.com/doc528950839_535595097|Читать полностью]]
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+FDTD Simulation: Optimizing an LTE Antenna's Matching Network
+A simple antenna for LTE band operation is added to the PC board of a smartphone in XFdtd and the matching circuit is tuned for operation in multiple frequency bands. The components in the matching network are chosen to maximize system efficiency.
+Figure 1 shows the antenna being used, which is a simple strip fed off center. It can be thought of as two back-to-back inverted L antennas of different “top” lengths, though the operating modes are more complicated than that. Figure 2 shows system efficiency for this antenna when fed directly and demonstrates that matching is required to improve performance.
+[[https://vk.com/doc528950839_535839179|Читать полностью]]
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 [[https://vk.com/doc558553917_530325568|Читать полностью]]
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+**Time Domain Simulation of Electrostatic Discharge Testing**
+An electrostatic discharge (ESD) is the sudden flow of current between two electrically charged objects, caused by the break-down of the dielectrics separating them, i.e., dielectric breakdown. In the case of electronic devices, the resulting current flow and possible spark can permanently damage the device (see Figure 1). An often recited yet unsubstantiated quote is “…losses associated with ESD in the electronics industry are estimated at between half a billion and $5 billion annually.” In reality, estimating the exact cost of ESD loss is extremely difficult; nonetheless, ESD forces the development and testing of many hardware prototypes during design and manufacturing and contributes to a high number of warranty claims with loss of consumer confidence if a failure occurs in the hands of the consumer. Therefore, electronics manufacturers go to great lengths to properly shield sensitive components and design systems to reduce, dissipate and neutralize static charge.
+[[https://vk.com/doc528950839_535595084|Читать полностью]]
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