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

Figure 5

Simulated return loss of the antenna (a) as a function of , the length of the inverted L-slot, (b) as a function of , the radius of the circle slot, (c) as a function of , the height of the comb-shaped ground, (d) as a function of , the length of the symmetrical rectangular slots on the ground, and (e) as a function of , the length of the middle rectangular slot on the ground; other parameters are the same as given in Table 2.

(a)

(b)

(c)

(d)

(e)