Radio noise of man-made origin has been measured and studied since the 50s of the past
century. From that time on, especially in the last two decades, the electromagnetic …

The paper proposes a novel procedure and the corresponding mathematical method to
measure the polarization characteristics of a planar wave. The method is intended and …

An experiment to investigate several characteristics of near vertical incidence skywave
(NVIS) propagation (polarization, characteristic waves and their isolation, elevation angles …

For any radio frequency (RF) sensor (receiver) to function optimally, the ambient noise field
strength, converted to electrical power by the transducer (antenna), must be lower than the …

The objective of this article is to design, build, test, and compare the performance of six
antennas (Turnstile, QHF, double-cross, Moxon, V-dipole, and Eggbeater) used for receiving …

Lately, there has been a particular interest in increasing the bandwidth of the ionospheric
channel in the high frequency (HF) range. Tests on the use of bandwidths of up to 24kHz …

High Frequency (HF) radio communications are used in humanitarian work in areas where
local networks are non-existent, or destroyed by natural disaster or human conflict. Direct …

Increasing the data transfer rate in the High Frequency (HF) range involves enlarging the
bandwidth of the channel from the standard value of 3 kHz to values of 6, 12, 24, 48 and …

Both spectrum management–the organization of radio services in the spectrum to maximize
spectrum utility–and radio link planning and the associated equipment design require a …

This paper innovatively proposed a dynamic threshold based target signal cooperative
extraction method for high frequency electromagnetic environment measurement. The …