Compact size antenna on thin flexible substrate for WLAN applications

A compact size (20.5 mm × 8 mm) antenna fabricated on a thin flexible substrate with dual-band operation is proposed. To achieve broad enough operating bandwidth to cover the 2.4 and 5.2/5.8 bands for WLAN applications, the proposed dual-band antenna is devised as a quasi-self-complementary (QSC) structure type. From the measured results, both the lower and upper resonant modes have exhibited an impedance bandwidth (2:1 VSWR) of 150 MHz (2390 ~ 2540 MHz) and 840 MHz (5150 ~ 5990 MHz), respectively.