low-cost 433MHz antenna shootout (eight of 'em)
Автор: Marcel Post
Загружено: 2017-10-31
Просмотров: 2283
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...
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