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You’ve Got The Portable Radio, Now What About The Antenna?
Hackaday
There's an old saying in the amateur radio community that when it comes to antennas all you need is a piece of wet string.
För 2 månader sedan
End-Fed Half-Wave Antenna Kit
ARRL
Item Details: The advantage of an EFHW is the ease of construction, it's versatility in a variety of installation configurations (sloping, horizontal, L, etc.),...
För 30 månader sedan
Radio Frequency Burns, Flying A Kite, And You
Hackaday
The RF burns from the kite antenna actually generate a little puff of smoke on contact. An experiment was used to demonstrate this fact involving a kite and a...
För 5 månader sedan
A self-matched leaky-wave antenna for ultrahigh-field magnetic resonance imaging with low specific absorption rate
Nature
We propose and experimentally demonstrate a leaky-wave antenna implemented as a periodically-slotted microstrip transmission line.
För 44 månader sedan
(Re)Discovering the Lost Science of Near-Field Measurements, Part 3
In Compliance Magazine
This third part investigates practical problems arising from the misapplication of field intensity and far-field concepts to near-field phenomena.
För 13 månader sedan
Fig. 3. Analysis of monopole antenna above virtual ground with...
ResearchGate
Fig. 3 shows the quarter-wave monopole on the ground and its quarter-wave image forming a half-wave dipole.
För 80 månader sedan
CRLH TLs and SIRs Lead to the Incredibly Shrinking Antenna
Microwaves & RF
The use of CRLH transmission lines and stepped impedance resonators (SIRs) on low-cost circuit materials delivers highly selective single-...
För 78 månader sedan
A Novel Broadband ± 45° Dual‐Polarized Cross‐Dipole Antenna with Multimode Resonance
Wiley Online Library
A novel broadband ± 45° dual-polarized cross-dipole antenna is presented for application in 2G, 3G, 4G, and sub-6 GHz 5G base station.
För 13 månader sedan
Matchbox Transceiver Pushes The Spy Radio Concept To Its Limits
Hackaday
The Altoids tin has long been the enclosure of choice for those seeking to show off their miniaturization chops. This is especially true for...
För 5 månader sedan
Novel multi-mode shortwave broadcast transmitting antenna array
Nature
A new type of shortwave broadcasting antenna array capable of reducing the lowest emission frequency to 4.4 MHz is proposed in this paper.
För 27 månader sedan