What does a ferrite antenna do?

The ferrite rod antenna operates using the ferrite material to “concentrate” the magnetic component of the radio waves through the pick-up coil. The fact that this RF antenna uses the magnetic component of the radio signals in this way means that the antenna is directive.

What is ferrite Loop?

Ferrite rod aerials (or antennas) are a type of small magnetic loop (SML) antenna very common in AM radio broadcast band transistor radios, although they began to be used in vacuum tube (“valve”) radios in the 1950s.

What is rod antenna?

A monopole antenna is a class of radio antenna consisting of a straight rod-shaped conductor, often mounted perpendicularly over some type of conductive surface, called a ground plane. Therefore the length of the antenna is determined by the wavelength of the radio waves it is used with.

Where are the ferrite loop antennas often used?

Ferrite loop antennas are made by winding fine wire around a ferrite rod. They are almost universally used in AM broadcast receivers.

What is quarter wave dipole?

Abstract: A new type of dipole antenna has been developed, which at a length of 0,25 to 0,3 wavelengths is matched to a coaxial line or a twin line. In principle the antenna may be considered as a special form of a folded dipole (or unipole).

Does a loop antenna have to be round?

Loop antennas may be in the shape of a circle, a square or any other closed geometric shape that allows the total perimeter to be slightly more than one wavelength.

What is a ferrite antenna?

As the name suggests the antenna consists of a rod or bar made of ferrite which is an iron based magnetic material. A coil is would around the ferrite rod or bar and this is brought to resonance using a variable tuning capacitor contained within the radio circuitry – typically within the RF stages of the radio receiver with which it will be used.

How to choose the right antennas for RFID?

Here the volumes of antennas required is huge. The antennas for RFID need to be compact and effective, making the ferrite rod antenna or ferrite bar aerial an ideal solution. Ferrite rod antenna basics. As the name suggests the antenna consists of a rod or bar made of ferrite which is an iron based magnetic material.

What is a null position in a ferrite rod antenna?

This occurs when the ferrite rod antenna is at right angles to the direction of the transmitter. This also means that the antenna has a null position where the signal level is at a minimum when the antenna is in line with the direction of the transmitter.

What is the super booster bar antenna?

This successful antenna is based on the article “Loop Experiments: The Super Booster Bar, by Gerry Thomas”, published on National Radio Club. This antenna has been tested and improved for almost ten years by R ene G ustav P assold, a Brazilian Dxer who masters ferrite loop techniques.