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 12

Comparison between this work and the previous work [13].

Antenna	Present	[13]
Radius (mm)	10	12.5
ka	0.1916	0.24
Total length (mm)	150.44	216
Resonant frequency desired (MHz)	915	911,25
Resonant frequency obtained (MHz)	915.1	912
(dB)	−24.59	−15.9
Radiation pattern	Quasi-isotropic	Quasi-isotropic
Gain (dB)	1.264	0.75
Opening angle (°)	360	<360