Here we have the concepts of small size, low noise, ULTRA wide bandwidth all obtained by the novel idea of the capacitive coupling conception. In fact it is very strange that, since the invention of the radio, attention was always concentrated on very big antennas, therefore mostly inductive, and little or no attention was concentrated on its analogue, or capacitive. As far as I know, only a German Scientist, during the second world war, Dr. Von Blumenthal (see "directory of deported German scientific personnel" - Springer & Verlach - Berlin - 1981) was pioneering this novel concept. He was an assistant, in early years, of distinguished Russian Dr. Popoff, by many believed to be the real inventor of radio. I could now mention Tesla, the genius, but we would digress too far.
I now wish to describe here my experiments and results with integrated Capacitive coupling in the course of next articles, but I invite others to share they experience if they also read and thought about novel antenna tecnics.
it is sensor that measure changes in capacitance between a sensor antenna and its surrounding. It has 3 mode Loading Mode, Transmit Mode, Shunt Mode.
https://ichickii.wordpress.com/2014/02/ ... teraction/
In the antenna described in the post by Mike2459 and modified by him we see an example of a simplest capacitor antenna which couples to the aethereal electric field of space. This was obtained using vintage UHF transistor and these properties perhaps cannot be reproduced. However, by changing the form of the the capacitor theory ensures it is possible to better couple to gain more electricity good without getting electricity bad which noise is. And this can be obtained by devising an omopolar surface suspended on space. I am studying special omopolar forms as suggested by Dr. Y. Zehforoosh in his article "CALCULATING OMOPOLAR SURFACES FOR FIELD CAPTURE ENHANCEMENT" and will propose a new antenna type.I didn't design a miniwhip, I've built two, one based on PA0RDT's design the second from a design used by PA3WFM at the University of Twente. I used a vintage Motorola 2N5160 UHF transistor in place of the BFQ149 and a SMD type J310 as the input FET. (I couldn't find any BFQ149's.)
The performance of both antennas are about the same. The purpose of building the 2nd was to achieve better IMD performance, it does pretty well in that respect as long as the supply voltage can be maintained at 12 volts at the antenna.