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Admin

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Everything posted by Admin

  1. yagi

    I think that's the best... ,,,and here is the file.cst
  2. ,,,the distance between the vibrator and the reflector as well as the other dimensions must be reviewed...!!!
  3. ,,, a simulation with the above dimensions (given by me)...
  4. ,,,if Guanella adaptation is correct, it can be even better... ,,,framed in red are dimensions in medium wavelengths...
  5. Gregorian Antenna – symmetrical reflector...
  6. Coaxial cables with an impedance of 50 ohms (Ω) are used to connect the transceiver to the antenna. The most common cables are RG 58 and RG 213:The RG 58 cable is used for use, which has a diameter of 5 mm and the losses it introduces are insignificant, due to the small length of the cable. One detail that you MUST keep in mind is that a cable must be equal in length to multiples of ½λ to properly transfer the impedance of the antenna. If the length is different then the cable will work as an impedance transformer. In this case, a properly tuned antenna will have a high SWR at the transceiver output. The shortening factor (k) has a special importance in the calculation of the cable length. It differs depending on the dielectric of the cable. -shortening factor(k) -Solid Polyethylene (PE): 66 %
  7. ,,, it depends on what kind (type) of cable it is ... in any case it is not a 75 ohm impedance cable ... !!!
  8. ,,, Shabra,how to get a commercial Kathrein vibrator...???
  9. Do you understand what I mean?
  10. ,,,Shabra,try to put the plate in the focus of the parabole grid...!!!
  11. ,, the secondary reflector from the grid antenna is for either vertical or horizontally polarization ... you need a secondary reflector with circular polarization...!!!
  12. ,,, another configuration ...
  13. Or the same ATVKD-15/21-39 (TV antenna “wave channel”, decimeter range, 15-element, channels 21-39):
  14. KROKS KAA20-2600 Dimensions (length , width , height ), mm 445 x 445 x 80 Antenna characteristics: Operating frequency range, MHz 2400-2700 Antenna gain, dB 20 VSWR in the operating frequency range, not more than 1.7 Polarization Линейная Input impedance, Ohm 50 Maximum input power, W 10 Connector N- female F- female Permissible wind load, m/s 30 Operating temperature range, °C -40 … +50 Maximum permissible humidity, % 100 Port isolation, not less, dB 30 Communication standard WiFi 2400 LTE 2600 Type of mounting on the pipe Execution type Panel
  15. Clanon, somewhere on this site there are also dimensions...!!!
  16. ,,, it seems that this Kathrein antenna is for sale...https://www.youtube.com/results?search_query=antenna+kathrein
  17. ,,,voiceofbusiness,,, the place of this type of antenna is not here, try to post in the right place...!!!
  18. SetupYagiCalculator.exe
  19. You have some antenna sketches from Splinder's book....???
  20. Norge, this antenna calculator is not exactly good, try to search on this site what interests you and you will find ... !!!
  21. ,,, yes, you're right, then this is ... ?? !! outdoor kna27 kna27-800/2700c gain signal booster gsm for 3g 4g LTE MIMO antenna
  22. I'm curious if this mcneil antenna works...????
  23. STREET II INTERNET SIGNAL ENHANCEMENT lte,,, another version of adaptation...