At present, portable receivers generally use ferrite rod antennas for LF and MF (below 2 MHz), and whip antennas for HF (up to 30 MHz). Each type has proved effective in its particular application.

This circuit is essentially an amplified crystal set. The inductor could be a standard AM radio ferrite rod antenna while the tuning capacitor is a variable plastic dielectric gang, intended for small ...

AM reception can be very difficult because of the inherent succeptibility AM has to electrical noise and other sources of interference. The built-in antenna in most receivers – a coil and a ferrite ...

Although Digital Radio Mondiale (DRM) services have been broadcast since 2003, it is only recently that domestic portable receivers have entered the market. The senstivity of this early equipment has ...

The circuit is intended to produce a simple antenna that has the capability to be tuned at medium wave frequency which complements the antenna of a radio receiver, without having to use any external ...