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Everything posted by Admin
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,,, okay, it's enough to just give the dimensions...!!!
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,,, there is not much difference between the two boom diameters(4mm or 8mm), although preferably it would be a diameter of 10(15) mm made of threaded screw and pipe and patches of galvanized sheet with a thickness of 0.5-1mm....!!! ,,,,increasing the boom diameter ensures a wider frequency band...!!!
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,,,double band no, but broadband yes...!!!
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However, this latest optimization has a wider frequency band... ,,, and a better gain in directivity....
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,,, in the air with dielectric spacer supports in the center of the patch...!!!
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,,,hi buddy...!!! ,,,as far as I understand , you want to use a Cassegrain Offset with this double patch antenna...!!! ,,,something like that ... !!!
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Instrumental,Bester antennas made after this program (Cantennator), are not very good...!!!!
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,,,this works too...!!!
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,,,0.5mm or 1mm, it doesn't matter...!!!
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,,, to obtain the 75 ohm impedance at connector F, it is necessary to use the 2.8mm diameter pin...
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,,, in my picture above, I mistakenly passed the SMA connector, when in fact it is an F connector...!!!
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Efficient offset mirror antenna irradiator for 4G networks (LTE800 and UMTS900, with support for MIMO technology. F=790-960 MHz, Resulting CU with a reflector up to 25dBi. The connector type is N-female (50 Ohms). The maximum speed of data reception in the LTE800 at a distance of up to 30 km. Electric characteristic Operating frequency range, MHz 790-960 Native gain, dBi 8 The resulting gain and width of the directional diagram by level -3dB at different diameters of offset parabolic antenna (F/D=0.5) 0.6 m 10-12 dBi 33-37 gr. 0.9 m 15-17 dBi 22-25 gr. 1.3 m 18-19 dBi 15-17gr. 1.8 m 21-22 dBi 11-13 gr. 2.5 m 22-25 dBi 8-9 gr. The width of the bottom of the irradiator in the E-plane at the level-10dB, deg 120 Width of the irradiator bottom H-plane at the level-10dB, deg 180 Decoupling between antenna inputs, not less than dB 28 Input resistance, Ohms 50 / 75 SWR in the operating frequency range, no more than 1,5 Permissible power, W 10 Polarization X-pol Mechanical characteristics Weight, g 1100 Overall dimensions, m 0, 2x0,2x0, 14 Connectors 2 x N -female The material of the radiator steel, galvanized steel, tinned sheet Protective coating powder polymer paint Protective box material Polycarbonate+ABS
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Mishka,try to design a log-periodic antenna as above (Kroks KNA+ 800-2700 MHz)
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I managed to do an optimization for you(75 Ohm impedance)...
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,,, yes, it is necessary to position two antennas at 45 degrees with a distance between them of approx. 0.9 * lambda..!!! ,,, a single MiMo antenna does not have the two ports isolated...!!! ,,,the above antenna is not well sized...!!!
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,,,okay,then you see that too....https://www.lan23.ru/forum/node/10557
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,,, why don't you try to make this type of antenna, better ... !!!
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Is also an interesting antenna... now it must to make another slightly less in material cost and in my opinion more technologically advanced broadband (400...450MHz) In beam - Plast. pipe Ø25mm . elements- the same copper wire 4.6 mm ....
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The proposed antenna is comprised of 2X4 perfectly electrically conducting (PEC) plates that are connected to the two edges of a rectangular PEC plate which is horizontal to the ground plane, as shown in Figure . The configuration mimics the shape of a butterfly. In general, the two PEC plates – two wings of the butterfly – can be circular, elliptical, or any shapes for impedance matching purpose. The antenna is implemented at a height h above the ground plane. In order to achieve the good impedance matching and desired radiation patterns, the angle alfa(11 degree) between the wing and the z-axis can be varied. The feed point of the antenna is located at its rectangular plate by a coaxial probe through a SubMiniature version a (SMA) connector.
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- 30 replies
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- patch array
- 24dbi
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,,, I don't think that's it ... !! 7x8 patches...???
- 30 replies
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- patch array
- 24dbi
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,,, beautiful work, congratulations .... !!! ,,,how you made the connection between the elements...???
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,,,yes, it's something like that...
- 30 replies
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- patch array
- 24dbi
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