Table 2: Measured results of the antenna bandwidth as a function of varying antenna structure.

Antenna structureLower band Upper band (I) Upper band (II)
Bandwidth, ~ (MHz) Bandwidth, ~ (MHz) Bandwidth, ~ (MHz)

Case I300, 950~1250650, 2000~2650400, 5100~5500
Case II250, 880~11301000, 2000~3000600, 4900~5500
Case III300, 700~1000600, 2000~2600800, 4500~5300
Proposed antenna520, 680~12001000, 1700~27001000, 4700~5700