Design of a Compact Quad-Band Slot Antenna for Integrated Mobile Devices

Table 1

Performance comparison of the proposed antenna with other reported antennas.

Reference	Size	Operating bands (GHz)	Peak gain (dBi)	Remarks
[2]	60 × 12	0.9–1.9	5.2	Few useful frequency bands or too large overall size
[3]	40 × 35	2.26–2.42,  3.29–3.6	3.3
[4]	40 × 10	2.38–2.52, 3.40–3.62	2.7	Few useful frequency bands
[5]	23 × 36.5	2.33–2.76, 3.05–3.88, 5.57–5.88	3.0	Only >2.3 GHz applications
[6]	38 × 25	2.4–2.7, 3.1–4.15, 4.93–5.89	2.9
[7]	29 × 28	0.79–0.92,  1.71–2.28	3.25	Few useful frequency bands
[8]	60 × 60	1.55–1.57, 2.395–2.695, 4.975–5.935	3.7	Too large overall size
[9]	40 × 20	0.82–2.69, 5.15–5.825	3.5	Incomplete coverage of WIMAX/WLAN applications
[10]	20 × 20	2.33–2.809, 3.36–3.54, 5.811–5.987, 7.994–8.486	Not mentioned
[11]	32 × 28	2.34–2.82, 3.16–4.06, 4.69–5.37	3.18	Nonindependently tuned resonant frequencies
[12]	67 × 38	0.863–1.049, 1.49–2.81	Not mentioned	Only <3 GHz applications
Proposed antenna	20 × 30	1.79–2.63, 3.49–3.97, 4.92–5.85, 7.87–8.40	6.9	Compact size and sufficient bands