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How wireless charging works on mobile devices

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Wireless-Charging-iPhoneWireless charging has become an essential option for smartphones and mobile devices.  What is wireless charging device and how does wireless charging works?

Wireless charging basically charging of mobile devices without using conventional wired connections. It works based on the principle of electromagnetic induction. One pair of coiled wires transfers energy in the form of magnetic flux. International standard for wireless charging is known as Qi wireless charging. [Read more…] about How wireless charging works on mobile devices

Most common RF connectors and its applications

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What are RF connectors?

RF-connectorsRF connectors are connectors used to make electrical connection for signal transmission in radio frequency applications. These connectors are used in wide variety of applications range from 0 to 18 GHz and above.

All types of RF connector have one male connector and one female connector. Male connectors are often called plug and female connectors as jack. Center pin and outer grounding with locking mechanism provides it a strong and reliable connection. [Read more…] about Most common RF connectors and its applications

S-parameter formats in vector network analyzers

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What are S-parameters?
vector network analyzer
 
S-parameters are the electrical characteristics of a signal in a complex network. It is also known as scattering parameters and mostly used in RF network and applications. Vector Network Analyzer is used to measure and analyze signal behavior of S-parameters. The signal behavior can be observed as gain, return loss, VSWR, reflection coefficient and group delay etc.

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What are Radio Frequency bands and its uses?

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rf-spectrum

What is Radio Frequency?

RF is the lowest portion in the electromagnetic spectrum familiar as a medium of analogue and modern digital wireless communication system. It spreads in the range between 3 KHz and 300 GHz. All known transmission systems works in the RF spectrum range including analogue radio, aircraft navigation, marine radio, amateur radio, TV broadcasting, mobile networks and satellite systems. Let’s take a look on each of the RF sub bands and the areas of RF spectrum uses.

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What is Impedance matching

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thinking_smithImpedance matching 
In electrical engineering, impedance is the ratio of voltage to current with the consideration of phase angle.  According to Ohm’s law V= IR, where V – voltage, I is the current and R is the resistance of the network.  In RF, the idea of impedance matching is to equalizing the source and load impedance for maximum power transfer. Impedance is represented as Z and is complex than just the resistance of the network. In simple explanation, impedance matching is to making source and load impedance as similar as possible in order to minimize losses.

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