Regarding Vector Network Analyzers; What are some affordable units that fit the bill for emdrive purposes at around 2.4 ghz? This http://www.ebay.com/sch/i.html?&_nkw=282376642705 seems inexpensive but my Chinese language skills are non-existent. Or would some big heavy Agilent 8753 series be better? I saw the post on the http://www.megiq.com/products/vna-0440 but I don't want to buy more than I'd need.
Uh... not the windfreak synthnv ? Why?
Quote from: R.W. Keyes on 05/20/2017 03:37 amRegarding Vector Network Analyzers; What are some affordable units that fit the bill for emdrive purposes at around 2.4 ghz? This http://www.ebay.com/sch/i.html?&_nkw=282376642705 seems inexpensive but my Chinese language skills are non-existent. Or would some big heavy Agilent 8753 series be better? I saw the post on the http://www.megiq.com/products/vna-0440 but I don't want to buy more than I'd need.The miniVNA Tiny works very well for return loss sweeps. It also has a smith chart for impedance matching the antenna. http://miniradiosolutions.com/54-2/
Regarding Vector Network Analyzers; What are some affordable units that fit the bill for emdrive purposes at around 2.4 ghz? This http://www.ebay.com/sch/i.html?&_nkw=282376642705 seems inexpensive but my Chinese language skills are non-existent. ...
According to the referenced website, production of this unit ended in December 2014 and no new products seem to be available from the company.
Quote from: R.W. Keyes on 05/20/2017 03:52 pmAccording to the referenced website, production of this unit ended in December 2014 and no new products seem to be available from the company. Where does it say the miniVNA Tiny has been discontinued? I see a new unit available from Ham Radio Outlet now. I think you are mistaking, "The production of the "EXTENDER" ended in December 2014" - which is another product: http://miniradiosolutions.com/extender/
Is that magnetic charge physical or not… Is an electron really made of "two magnetic charges" or is the magnetic field just a description of the electrodynamic interaction of two charged particles in motion relatively to each other, due to their spin?Physically speaking, it depends of how you answer the question what is the magnetic field. Simplistic view: when you cut a magnet in half, you don't get two separate North pole and South pole, you get two dipole magnets. You can cut the magnet again and again and again down to the atomic level: finally you'll reach the electron which is still a magnetic dipole. It's like saying you want to slice a window glass so thin because you want a window with only one side.So according to this view, the magnetic field is something that comes out from an electric flow (current) and not the other way around, and it is always a dipole. And the magnetic monopole cannot exist.But is an electron made of two magnetic charges? When explaining the origin of mass and inertia, some people including the media tell it is due to a particle, the Higgs boson. Although they omit to say it is just a hypothesis, and others hypotheses for the origin of inertia do exist, like the Mach-Einstein-Sciama-Woodward hypothesis, or quantized inertia (MiHsC). But at this point choosing between them is rather a matter of belief.Dirac's equations plead in favor of the existence of discrete magnetic charges and magnetic monopoles. Observation does not. What is reality?My understanding of the magnetic field is incomplete, since there is no electric charge in movement in the propagation of an electromagnetic wave in a vacuum, although there is a magnetic and electric fields associated with the wave. I admit I don't understand the physical meaning of an EM wave, I have always seen this as a mathematical trick and not a true description of reality, especially as there is no æther as a medium for the propagation of the wave and its EM field. Except EM waves are really propagating in vacuum, so… I'll stop there, because I can't add more to the debate. But you get the idea.
Magnetic monopolesI thought I already posted this, but probably I didn'thttp://www.sciencealert.com/our-quest-to-find-the-truest-north-in-the-universe-just-took-an-unexpected-turngiven the latest discussions about monopoles, I suppose the above (and the original paper linked at bottom) may be of interest
"Whereas the Dirac monopole experiment simulates the motion of a charged particle in the vicinity of a monopolar magnetic field, the quantum monopole has a point-like structure in its own field resembling that of the magnetic monopole particle itself."