Design and Development of a New Electrically Small 3D UHF Spherical Antenna with 360° of Opening Angle in the Whole Space for RFID, WSN, and RSN Applications

Table 9

Dimensions of each 3D spherical antenna (Figure 18) with the simulation results.

Antenna	1	2	3	4
(mm)	14	14	14	14
(mm)	77.96	77.36	76,36	75.36
(mm)	12.38	11.7	11.11	10.86
(mm)	4.5	5	5.5	6
(mm)	29.02	27.88	27.09	27.09
Total length (mm)	163.75	160.52	157.76	157.26
(mm)	3.23	3.23	3.23	3.23
(mm)	6	6	6	6
(dB)	−28.09	−28.39	−26.44	−21.42
fr (MHz)	915.3	914.9	915.1	915.1
(dB)	2.58	2.815	2.816	2.835
Opening angle (°)	360	360	360	360