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Questions & Answers on Wireless Charging

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What is the Magnetic Power Profile?

Wireless Charging 

Editorial Team

Apr 27, 2024
Magnetic Power Profile (MPP) is a technology that uses magnets to automatically align the wireless charging transmitter and receiver coils perfectly before wirelessly transferring power. This reduces ...read more

What is Qi 2.0?

Wireless Charging 

Editorial Team

Jul 11, 2023
Qi 2.0 (Qi2) is the latest wireless charging standard developed by the Wireless Power Consortium (WPC). The group introduced it in January 2023, replacing the existing Qi wireless charging standard. T...read more

Qi 1.3 Wireless Charging Standard

Wireless Charging 

Editorial Team

Nov 11, 2021
On August 23, 2021, the Wireless Power Consortium (WPC) announced the release of Qi v1.3, the latest version of its Qi (pronounced “chee”) wireless charging specification for smartphones a...read more

What is the Qi Extended Power Profile?

Wireless Charging 

Editorial Team

Nov 15, 2017
The Wireless Power Consortium (WPC) that manages the Qi specification has raised the maximum charging power from 5W to 15W. This 15 Watt power profile is called Qi Extended Power Profile. It enables d...read more

What is the difference between a monopole and dipole antenna?

Antennas RF Basics 

Peter McNeil

Jul 12, 2017
In essence, the difference between a monopole and dipole antenna, is that a dipole antenna uses an additionally radiator to generate a synthetic ground plane between the symmetric radiator elements, w...read more

How much power can be wirelessly transferred using the AirFuel Alliance Standard?

Wireless Charging 

Editorial Team

Jan 5, 2017
The AirFuel Alliance Specification allows the transfer of up to 50 watts of power. Devices using this standard can operate at a number of power levels based on the required application. Below is a tab...read more

How much power can be wirelessly transferred using the Qi Standard?

Wireless Charging 

Ashwini Mann

Jan 5, 2017
The Qi 1.0 and 1.1 Specifications used to support power transfers of up to 5 Watts. The latest Qi Specification, Version 1.2 supports the transfer of up to about 15 W.This answer has been taken from t...read more

At what frequency does Wireless Charging for the AirFuel Alliance Standard work?

Wireless Charging 

Editorial Team

Jan 4, 2017
According to the AirFuel Alliance specification the wireless charging resonator system operates at 6.78 MHz ± 15 kHz. The AirFuel Alliance Specification can be downloaded here.

At what frequency does A4WP (Alliance for Wireless Power) Wireless Charging work?

Wireless Charging 

Editorial Team

Jan 4, 2017
Wireless charging using the A4WP Standard works at 6.78 MHz. This is the frequency used for power transfer. However the A4WP standard uses the 2.4 GHz ISM band for communication between the transmitte...read more

At what frequency does PMA (Power Matters Alliance) Wireless Charging work?

Wireless Charging 

Editorial Team

Jan 4, 2017
Wireless charging using the PMA Standard works at 277 kHz to 357 kHz. This is the frequency used for both power transfer and communication between the transmitter and receiver.

At what frequency does Qi Wireless Charging work?

Wireless Charging 

Editorial Team

Jan 5, 2017
Qi Wireless charging works at a frequency from 80 kHz to 300 kHz. This is the frequency used for both power transfer and communication between the transmitter and receiver.

What is Foreign Object Detection?

Wireless Charging 

Editorial Team

Dec 14, 2016
In wireless charging, metal objects that get close to a wireless power transfer system may couple a portion of an electromagnetic field and heat up. The detection of foreign objects around the system ...read more

What is Qi Wireless Charging?

Wireless Charging 

Editorial Team

Dec 14, 2016
Qi - pronounced as 'CHEE' - is the international standard of wireless charging developed by Wireless Power Consortium for the Near-Field applications. It allows you to wirelessly charge a compati...read more

How Does Wireless Charging Work?

Wireless Charging 

Editorial Team

Dec 10, 2016
Wireless charging is a technology to transmit electromagnetic energy through air to charge a device, without any connecting wires. In 1890, Nikola Tesla was the first to conclude that power could be t...read more

V-Band vs E-Band for Backhaul Applications

Backhaul Millimeter Waves Wireless Infrastructure 

Editorial Team

Nov 28, 2016
With an increase in the deployment of small cells for LTE and 5G, we are seeing more wireless backhaul solutions being used to provide base station connectivity. Most backhaul solutions today operate ...read more