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(Re)Discovering the Lost Science of Near-Field Measurements – Part 1
In Compliance Magazine
This article is the third in a series commemorating 70 years since the advent of modern EMI testing. But this last article is itself divided...
För 16 månader sedan
The $50 Ham: A Cheap Antenna For The HF Bands
Hackaday
A simple but versatile antenna design that can be adapted to support everything from a big, powerful base station to portable QRP (low-power) activations in...
För 45 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
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 28 månader sedan
Portable Ham Antenna Uses SMD Capacitors
Hackaday
[K6ARK] likes to operate portable, so he puts together very lightweight antennas. One of his latest uses tiny toroids and SMD capacitors to form trap elements.
För 47 månader sedan
High gain quasi-omnidirectional dipole array fed by radial power divider for millimeter-wave IoT sensing
Nature
This article presents the design and implementation of a dipole array antenna based on a radial waveguide power divider for millimeter-wave...
För 3 månader sedan
Fig. 4. 1D leaky-wave antenna based on a sinusoidally modulated...
ResearchGate
Leaky waves have been among the most active areas of research in microwave engineering over the second half of the 20th century.
För 2 dagar sedan
Wind-Up Tape Measure Transformed Into Portable Ham Antenna
Hackaday
If there's one thing that amateur radio operators are good at, it's turning just about anything into an antenna.
För 31 månader sedan
Homogeneous microwave near-field power focusing using a cylindrical antenna array
Nature
This paper presents an investigation of a microwave near-field power focusing (NFPF) analytical approach utilizing a cylindrical array of electric line sources...
För 13 månader sedan
A True Metasurface Antenna
Nature
We present a true metasurface antenna based on electrically-small resonators. The resonators are placed on a flat surface and connected to one feed point using...
För 105 månader sedan