Compact Multiband Interdigital-Coupled-Fed Planar Antenna with Stepped-Impedance Structures for Mobile Handsets

Figure 3

Measured gain radiation patterns at (a) 915 MHz; (b) 1575 MHz; (c) 2450 MHz; (d) 3200 MHz; and (e) 5875 MHz.

(a)

(b)

(c)

(d)

(e)