A Frequency Reconfigurable Compact Planar Inverted-F Antenna for Portable Devices

Table 2

Comparison with other designs.

Ref.	Antenna size	Working frequency (GHz)	No. of switches	Substrate	Gain (dBi)
[12]	63.5 33.5	2.1, 2.4, 3.5	3	FR-4	0.48–4.33
[13]	50 45	2.2–6	2	FR-4	0.4–5.8
[14]	65 60	1.45–4.6	6	FR-4	N.A
[17]	62 46	2.45, 5.25, 5.75	N.A	Denim	1.26–2.64
[18]	40 60	2–10	4	FR-4	0.64–2.5
[19]	50 50	3.5, 5.5	4	FR-4	1.5–4.2
[20]	40 30	1.8, 2.1, 2.6, 3.5, 4.8, 5, 5.6, 6.4, 6.5	4	FR-4	1.25–3.6
[21]	120 60	2.4, 3.5	4	RO4003C	3.7–4.2
This work	44 14	GSM 850, GSM 900, UMTS 2100	2	FR-4	1.89–2.12