The 3DC15-HF 3D-coil isotropic magnetic antenna for NFC applications has a high surface resistance NiZn ferrite core and low initial permeability to work at high frequency providing stable performance ...

The purpose of this article is to explain, in detail, the process involved in building and tuning a high-frequency (HF) RFID antenna, which would operate at 13.56 MHz. Some concepts will be explained ...

Marked: "De Forest Coil / Antenna / Pat. 2-17-03 / 10-11-04 / 12-15-05 / 4-22-06 / Other Patents Pending". This antenna is a plug-in unit for use with De Forest D-17 and D-12 Radiophone receivers. A ...

The magnetic loop antenna is a familiar sight in radio amateur circles as a means to pack a high performance HF antenna into a small space. It takes the form of a large single-turn coil made into a ...

Typically, the largest circuit component in wireless electronic devices such as mobile phones is the antenna, which sends and receives electromagnetic waves. The tiniest antennas available are made up ...

High-frequency applications, especially in the area of radio technology, require air coils with a particularly high Q-factor. Specifically adapted to the current market requirements for this area of ...