New answers tagged antenna-system
0
Make yourself a multiband antenna with many doublets in parallel, fed with just one feedline.
A fan dipole is very likely a much better choice of multiband antenna for you, for both (1) easy impedance matching and (2) similar patterns on each band. You can make one with many doublets in parallel, spaced apart and fed with just one feedline.
You won't need ...
3
A single antenna that functions over such a wide band will necessarily be less than ideal. Compromises must be made to achieve such wideband performance.
The antenna will have to be at least big enough for the lowest band, so anything significantly than 259 feet will be quite difficult to get working on 160 meters.
Then, you especially want to avoid any ...
1
While studying this question enroute to writing an article on "A Slightly Off-Center-Fed Diople" in QST for September 2019, I learned that connecting the feedline to the antenna at a current node will essentially prevent the antenna from taking power at that frequency. Center-fed dipoles experience current nodes when the feedpoint is any even multiple of the ...
1
I know the major components of rectenna should be
Receiving antenna - Patch Antenna
It needs to be an antenna. Not necessarily a patch antenna.
Matching circuit
Low pass filter
Rectifier - Schottky diode
The Low Pass Filter needs to come after the diode! Otherwise, there'd be no more signal energy to rectify.
For number 1(Rx): ...
3
Below for further discussion is a NEC4.2 study for the folded dipole antenna description provided in earlier posts in this thread.
Of course its input SWR and radiation patterns vary with frequency. The patterns at the two ends of the HF amateur bands and the input SWR across that spectrum are shown in the study.
The NEC wire model showed no segment or ...
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