A Triband Patch Antenna with Monopole-like and Patch-like Radiation Patterns for Multifunctional Wireless Systems

Table 1

Comparison with other antennas having omnidirectional and unidirectional radiation patterns.

Antenna	Radiator number	Operation band	Size of radiator at the lowest operating frequencies	Antenna profile	Radiation pattern
					Lower band	Middle band	High band
[9]	2	Dual band		0.03λ0	Omnidirectional	—	Unidirectional
[10]	2	Dual band		0.09λ0	Unidirectional	—	Omnidirectional
[14]	1	Dual band		0.26λ0	Omnidirectional	—	Unidirectional
[19]	1	Dual band		0.047λ0	Omnidirectional	—	Unidirectional
This work	1	Triband		0.06λ0	Omnidirectional	Unidirectional	Unidirectional