Table 2.

Comparison of experimental and modelled (predicted) resonant frequency values for LoRa designs nominally at 433 MHz and 915 MHz. Prediction error shown indicating a rms error of 3.6% at 915 MHz and 1.3% at 433 MHz.

433 MHz Series	SRR Design 1	SRR Design 2	SRR Design 3	SRR Design 4	SRR Design 5	rms	mean
Experimental	413.6	457	373.4	427.8	413.9	30.2	417.1
Predicted	437.5	481.2	393.7	440.5	439.7	31.0	438.5
Prediction error	5.78%	5.30%	5.44%	2.96%	6.23%	1.27%	5.14%
915 MHz Series	SRR Design 1	SRR Design 2	SRR Design 3	SRR Design 4	SRR Design 5	rms	mean
Experimental	904.6	938.2	851.5	1032.4	856.8	73.9	916.7
Predicted	927.3	972.5	880.6	1002.1	917.1	47.8	939.9
Prediction error	2.51%	3.65%	3.41%	−2.94%	7.04%	3.61%	2.74%