Long Range Backhaul Microwave Connectivity in Wireless Sensor Networks via a New Antenna Designed for ISM 2.4 GHz Band

Table 1

Combinations of length and width having 9 or more values of frequencies at which S₁₁≤−10 dB.

Frequency (GHz)	S11 (dB)
	L = 135.8625 and; W = 2.4500 (mm)	L = 137.0875 and; W = 2.4500 (mm)	L = 137.0875 and; W = 3.0625 (mm)	L = 137.7000 and; W = 3.0625 (mm)	L = 138.3125 and; W = 3.6750 (mm)	L = 138.925 and; W = 3.0625 (mm)	L = 138.925 and; W = 3.6750 (mm)	L = 140.7625 and; W = 3.6750 (mm)
2.40	−6.0547	−20.0428	−7.7774	−12.6340	−6.6268	−20.3372	−7.6345	−17.6077
2.41	−8.3277	−21.2642	−10.7495	−20.8480	−8.7941	−23.1618	−10.5209	−34.0153
2.42	−12.2417	−12.5088	−16.2745	−16.1391	−12.4298	−13.5948	−15.9357	−15.3920
2.43	−17.2961	−10.2786	−34.0478	−10.2547	−20.2624	−10.6048	−30.6464	−10.8323
2.44	−13.4937	−11.9863	−17.5265	−7.9971	−24.4649	−10.7131	−16.3949	−9.7477
2.45	−10.7989	−19.2861	−12.5767	−8.0401	−14.0835	−14.8016	−11.2576	−9.3720
2.46	−12.2086	−25.2664	−10.9056	−10.0502	−10.7083	−34.4384	−9.4284	−10.3894
2.47	−17.8304	−15.0133	−11.4929	−14.6577	−10.6537	−15.6824	−10.1338	−16.0945
2.48	−24.9997	−10.3702	−17.3352	−29.0724	−14.6946	−10.3307	−14.6155	−29.9700
2.49	−15.3060	−7.7319	−20.0749	−18.5807	−24.7967	−7.6640	−38.9414	−14.5070
2.50	−10.7191	−6.1039	−12.2289	−11.7554	−15.2281	−6.0429	−15.7013	−10.2916
Gain (dB)	13.19	10.37	12.64	9.20	13.82	9.56	12.81	16.92
Frequency impedance bandwidth (%)	3.25	3.28	3.67	1.61	3.25	3.28	1.21	1.61
Frequency impedance bandwidth relative to S11 ≤ −9 dB (%)	3.25	3.28	3.67	1.61	3.25	3.28	3.67	4.08