RF Noise Reduction resourcesHome : Technical Reference : Radio
Frequency Interference : Noise Reduction Antenna Noise and
Signal Cancelling at LF - By using the signals from two
antennas, controlling their relative amplitudes and controlling
the phase of one of them, unwanted signal or unwanted noise can
be phased out. Circuitry is described which uses the signal from
a wire antenna to provide selective cancelling against the
signal output from an LF loop antenna. QRM and noise reduction -
You will find on these pages my experiences and results on
antennas and local/non-local QRM/noise reduction. Using a
broadband vertical active magnetic loop and a home made /
designed broadband amplifier. Two vertical magnetic Alford loops
are used in an array. Analog and Digital Signal Processing and a
dual phase coherent Software Defined Radio (SDR) are used. By
PA0SIM Using ferrite for interference suppression - Excellent
guide to using ferrite cores for interference suppression.
Understanding and Solving RF Interference