Loop antenna
Found 9 free book(s)
My Loop Antenna - RCARC
www.rcarc.orgMy Loop Antenna November 20, 2013 14 Receive Properties of Electrically-Small Loops •Loop antenna is tuned to a resonance on receive by adjusting the tuning capacitor •Atmospheric noise dominates over receiver noise at HF •Tuning is narrowband, tending to limit received noise •Gain of a loop may be lower than that of other antennas, but
DIY Magnetic Loop Antenna - CVARC
www.cvarc.orgloop antennas, there are a few new ideas to grasp. However, thanks to other hams like Steve AA5TB there are tried and tested designs, calculators & building methods that are known to work and that you can follow. At the heart of every radio and MLA (Magnetic Loop Antenna) is the resonant circuit.
Locating RF Interference at HF - ARRL - Home
www.arrl.orgThe Loop Antenna A loop antenna is bidirectional. You can rotate the loop easily if you hold it above your head with the feed point at the bottom. In this position, vertically polarized signals peak when the loop is turned edgewise to the source. Additionally, a deep null in the signal occurs for vertically polarized signals when the loop is ...
Multiband Vertical Loop Antenna 10, 14, 21, 28 MHz
www.ve2azx.netLoop Antenna 1 λon 15 m (approx.47.5 ft.) #12 AWG 400 Ωladder line 22.5 ft. Wireman # 551 To antenna tuner via approx 51 ft. RG-8 Length not critical. Loop and pre-matching circuit Uses a ladder line as impedance transformer The length of the ladder line is approx. λ/2 at 21 MHz. Obtained from simulations.
How to design an antenna for dynamic NFC tags ...
www.st.comFigure 8. Equivalent circuit of the dynamic NFC tag chip mounted on a loop antenna. Figure 8. shows the equivalent circuit of an dynamic NFC tag chip mounted on a loop antenna in the presence of a sinusoidal magnetic field. V. OC. represents the open circuit voltage delivered by the antenna, which depends on the magnetic field strength, the
Portable Magnetic Loop Antennas - FARS
www.fars.k6ya.orgUsing A Mag Loop in the Field zTUNING: zHigh-Q Makes Tuning by Receiver Noise Easy and Fairly Accurate zALWAYS check SWR before APPLYING Full POWER zCan Use MFJ-249/269 or other Antenna Analyzer, but Stand as Far from Loop as Possible zStep in, Step out Dance Dance Revolution!
The Underestimated Magnetic Loop HF Antenna
www.nonstopsystems.comA magnetic loop antenna (MLA) can very conveniently be accommodated on a table top, hidden in an attic / roof loft, an outdoor porch, patio balcony of a high-rise apartment, rooftop, or any other tight space constrained location.
Modern Antenna Design - Radio Astronomy
www.radio-astronomy.org1-11.4 Antenna Polarization Response, 23 1-11.5 Phase Response of Rotating Antennas, 25 1-11.6 Partial Gain, 26 1-11.7 Measurement of Circular Polarization Using Amplitude Only, 26 1-12 Vector Effective Height, 27 1-13 Antenna Factor, 29 1-14 Mutual Coupling Between Antennas, 29 1.15 Antenna Noise Temperature, 30 vii
Antenna designs for MIMO systems
sites.science.oregonstate.edu-2-1 antenna designs for mimo systems 4 1.1 introduction 4 1.1.1 the need for multiple antennas 4 1.1.2 the need for antenna integration 5 1.1.3 antenna design factors affectingmimoperformance 6 1.1.4 diversity 11 1.1.5 isolation 12 1.2 target antenna specification 14 1.3 high dielectric resonator solution 15 1.3.1 development methodology 16 1.3.2 single element design-simulation 17