Circularly Polarized Omnidirectional Antenna with Dipole Core and Diagonally Adjoined Parasitic Braces for ISM Band Applications

Table 3

Comparison between CP omnidirectional antennas.

Ref.	Impedance bandwidth	AR bandwidth	Gain	Size (mm^3)	Radiation Pattern
5	2.32 – 2.54 GHz	2.32 – 2.61 GHz	1.20 dBic	33 × 33 × 20	Omnidirectional
11	2.40 – 2.51 GHz	2.46 – 2.48 GHz	1.90 dBic	80 × 46 × 6	Omnidirectional
15	2.27 – 2.77 GHz	2.25 – 2.73 GHz	3.75 dBic	180 × 180 × 3	Omnidirectional
16	2.30 – 2.94 GHz	2.39 – 2.57 GHz	0.91 dBic	39 × 39 × 33	Omnidirectional
19	2.37 – 2.63 GHz	2.37 – 2.56 GHz	1.56 dBic	53 × 53 × 20	Omnidirectional
20	2.39 – 2.51 GHz	2.39 – 2.51 GHz	1.12 dBic	50 × 50 × 20	Omnidirectional
proposed	2.35 – 2.57 GHz	2.40 – 2.60 GHz	2.07 dBic	52 × 52 × 56	Omnidirectional