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7 wrz 2024 · Ferrite "Loop-Stick" magnetic can be decent antennas when designed for the proper range. The Effective Aperture of those many turns cutting the magnetic field component of the RF wave makes it useful as does the reduction in e-field noise.
20 mar 2021 · His plans are easy and you can use the antenna near an AM radio with built in antenna to improve its reception or connect a coupling loop to feed antenna input terminals on radios that can use external antennas.
Ferrite rod antenna is a small magnetic loop antenna used in AM broadcast transistor radios for medium & long waveband reception and RFID applications. It is designed with a rod or bar made of ferrites and includes a coil wound around the ferrite rod with the help of a variable tuning capacitor in the radio circuitry.
A common way of improving the reception of weak stations by an AM pocket radio with a relatively small build-in ferrite rod antenna is to place a large tuned loop antenna near it and tune this auxiliary loop antenna to the same reception frequency as the pocket radio.
Take a closer look at the ferrite bar antenna. The coil is actually a loop antenna! If you remove the ferrite, the radio will still be able to receive stations, but only strong local ones.
Ferrite loopstick antenna from an AM radio having two windings, one for long wave and one for medium wave (AM broadcast) reception. About 10 cm (4 inches) long. Ferrite antennas are usually enclosed inside the radio receiver. Ferrite loop antennas are made by winding fine wire around a ferrite rod. They are almost universally used in AM ...
A ferrite core in the loop that tends to increase the magnetic flux, the magnetic field, the open-circuit voltage, and in turn the antenna efficiency of the loop. Ferrite core electrically small loops are often used for receiving signals, such as in radios and pagers, where the signal to noise ratio is much important than efficiency.
