lora-antennas
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| lora-antennas [2024/04/03 03:13] – river | lora-antennas [2024/04/30 18:51] (current) – river | ||
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| * EFHW | * EFHW | ||
| * Collinear | * Collinear | ||
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| + | Design centre frequency for UK / EU: 869.525 MHz | ||
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| ===== PCB Antennas ===== | ===== PCB Antennas ===== | ||
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| The separately purchased Heltec paddle antenna is sort of ok at 868MHz. It has a bunch of peaks not quite where you want them. | The separately purchased Heltec paddle antenna is sort of ok at 868MHz. It has a bunch of peaks not quite where you want them. | ||
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| + | ===== ebay one, grey, " | ||
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| + | Quick test with LiteVNA, mounted directly on prototype nyan boxes, both metal and plastic. Results about the same on both. Return loss from about 15dB to 19dB, depending on position relative to my body and surrounding stuff, and whether I touched the metal base or not. Touching made more difference on the plastic box. | ||
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| + | It seems tuned to about 854MHz, at which point it does much much better than at the tested 869.24MHz. At one point 30dB RL. | ||
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| + | These measurements were taken without considering the added uFL -> N pigtail, so should be taken with a pinch of solt. | ||
| ====== Cables ====== | ====== Cables ====== | ||
lora-antennas.1712114027.txt.gz · Last modified: 2024/04/03 03:13 by river