The j-pole antenna is basically an end fed half wave dipole that uses a 1/4 wave shorted matching stub as an impedance transformer. The j-pole antenna will yield slightly less than 3 DB of gain omnidirectionally. The material I chose to build the j-pole antenna was 3/4 inch copper pi...
With everything in place, I tried to make a quick FT8 contact from home with this setup, but with my “big” EFHW antenna in my backyard. Because it was just a quick test, I did not even bother to hook up the charging cable for my phone (more on that later). The software I a...
Any estimate of occupancy less than the previously calculated upper limit would make it more imperative to account for the rapid overall rate observed in terms of a rate constant for the second electron transfer faster than that possible if SQ had to react from the distal domain of the Qo-...
Hence, to counterbalance the “end effect” and to make the antenna works properly, it is necessary to cut the antenna wire about to 5% and makes its physical length approximately 95% of half of the wavelength. Thus, to get the practical length of the antenna wire, the value multiplied by...
How to ground an antenna Antenna RF ground Antenna ground plane Knowing how to ground or earth an antenna system can be a key factor in the operation of some antennas.Knowing how to ground an antenna properly can make significant improvements to its performance, whereas a poor grou...
The questions are: How do diverse species detect weak natural geomagnetic signals, distinguish the subtle internal microcurrent and magnetic fields inherent to all biology from external fields, then get beyond both internal and external background noise to make use of that electromagnetic information?
pharmaceutical companies, whosespecific goalsinclude the creation of “healthy markets for vaccines and other immunisation products.” As a founding partner of the alliance, the Gates Foundation provided $750 million in seed funding and has gone on to makeover $4.1 billionin commitments to the ...
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to readers from different backgrounds. The aim is to improve the knowledge and understanding of the subject of activated carbon for non-adsorption experts such as professionals in industry. Therefore, it is written in a comprehensible manner and dispenses with detailed explanations to complex ...