Results 231 to 240 of about 56,526 (292)

Micro-Doppler radar deception and camouflage of airborne targets. [PDF]

open access: yesSci Rep
Kozlov V   +6 more
europepmc   +1 more source

Ultrahigh-frequency loop antennas

Electrical Engineering, 1940
ANTENNAS which are discussed in this paper were developed for two applications: (1) to serve as elements in radiating systems of localizers and radio ranges used to guide aircraft; (2) to act as receiving antennas carried by aircraft.
Andrew Alford, A. G. Kandoian
openaire   +1 more source

Quadrifilar loop antenna

IEEE Transactions on Antennas and Propagation, 2003
A new quadrifilar antenna has been developed for generating circularly polarized backfire radiation. The antenna consists of two orthogonal rectangular conducting loops, each incorporating capacitive coupling and fed using either a single or two coaxial cables.
Fusco, Vincent, Cahill, Robert, Li, R.L.
openaire   +2 more sources

Laser Controlled Loop Antenna

2021 Systems of Signals Generating and Processing in the Field of on Board Communications, 2021
A new type of antenna system has been proposed - a configurable loop antenna with laser control. It is shown that the addition of semiconductor elements of the photoresistor type to the elements of the outer contour of the loop antenna makes it possible to significantly expand the functionality of the loop antenna and control the antenna ...
S. Yu. Kazantsev   +3 more
openaire   +1 more source

Loop antennas for underwater communications

12th European Conference on Antennas and Propagation (EuCAP 2018), 2018
In this paper, the performances of circular loop antennas for underwater communication, designed to work both in freshwater and seawater, are analyzed. Firstly, the attenuation and wavelength in both environments are evaluated with the goal of selecting the proper working frequencies, that are supposed to be 433.92 MHz in freshwater and 10 kHz in ...
Andrea Massaccesi, Paola Pirinoli
openaire   +2 more sources

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