In this diagram the ferrite rod antenna is seen as the inductor and core at the input (left hand side) of the circuit. RF front end circuit from a transistor radio showing ferrite rod antenna In this way the antenna can be tuned to resonance. Ferrite rod antenna in old transistor radio Ferrite rod antenna basicsĪs the name suggests the antenna consists of a rod or bar made of ferrite which is an iron based magnetic material.Ī 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. The antennas for RFID need to be compact and effective, making the ferrite rod antenna or ferrite bar aerial an ideal solution. Here the volumes of antennas required is huge. However ferrite rod antennas are being used increasingly in wireless applications in areas such as RFID.

The ferrite rod aerial or ferrite bar antenna is a form of RF antenna that is almost universally used in portable transistor broadcast receivers as well as many hi-fi tuners where reception on the long, medium and possibly the short wave bands is required.Īs the popularity and listeners of long, medium and short wave broadcasting decreases, as there are higher quality services available via VHF FM and digital services, this sector is decreasing. Ferrite Rod Antenna: ferrite bar aerial Notes about the ferrite rod antenna or ferrite bar aerial, a form of RF antenna that is widely used in RFID and portable transistor radio applications.įerrite rode antenna basics Ferrite rod parameters

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