Design of a Flexible Cylindrical Antenna with Rotatable Curved Frequency Selective Surface for Omnidirectional High-Gain Applications

Table 3

The comparison between this work and other relevant works.

References	Feeding method	Flexibility	Operating band (GHz)	Maximum enhanced gain (dBi)	Directivity
[23]	CPW feed	No	2.2–4.8	4	Directional
[24]	Coaxial probe	No	2.4/3.5/5.5	4.4	Directional
[25]	Microstrip feed	No	2.37–2.56/5.15–6.22	3.56	Directional
[26]	Microstrip feed	No	2.38–2.7/3.28–5.8	5	Directional
[27]	Microstrip feed	No	2.4	∼5	Directional
[28]	Microstrip feed	No	2.3–2.62/4.9–6.45	4.6	Directional
[29]	CPW feed	Yes	2.4	4.81	Directional
[30]	Microstrip feed	Yes	2.24–2.76	6.3	Directional
This work	CPW feed	Yes	2.18–2.90	5.31	Omnidirectional