low-cost 433MHz antenna shootout (eight of 'em) скачать в хорошем качестве

low-cost 433MHz antenna shootout (eight of 'em)

Testing 8 low-cost antenna options for 433MHz (70cm band). Equipment used: Standard Moteino ($12.99) at www.lowpowerlab.com https://lowpowerlab.com/shop/product/99 (I used these for both the base station as well as the hand-held mobile unit) The antennas I used (or comparable model): (Note: some links may not be valid anymore) Antenna #1 (centre-loaded quarter wave vertical) https://www.ebay.com.au/itm/SMA-Male-... Antenna #2 (PCB J-Pole) https://www.ebay.com.au/itm/New-433MH... Antenna #3 (short helical) https://www.ebay.com.au/itm/433MHZ-1X... Antenna #4 (sleeve dipole) https://www.ebay.com.au/itm/New-433MH... Antenna #5 (PCB Dipole [my design]) Order PCB from OSH Park directly: https://oshpark.com/profiles/captcha How they were made: https://lowpowerlab.com/forum/rf-rang... Diptrace design files: https://lowpowerlab.com/forum/rf-rang... Antenna #6 (monopole, bit of wire) See this video for tuning the wire:    • monopole 433MHz antenna length   Antenna #7 (short helical for high power) https://www.ebay.com.au/itm/M-Male-PL... Antenna #7 (whip antenna) https://www.ebay.com.au/itm/AU-Stock-... On the base station I used the short helical (same as Antenna #1) 30 dB Attenuators https://www.ebay.com.au/itm/Golden-At... Earlier test with similar results; https://www.marcelpost.com/wiki/index...