INTERNAL CELLULAR HANDSET ANTENNA WITH A CURVED METAL PATTERN FOR DECREASED NEAR-FIELD RADIATION

摘要

Near-field radiation characteristics of an internal cellular handset antenna with a curved metal pattern are studied. The antenna's metal pattern comprises a simple strip monopole for the GSM1800/1900 operation. The strip monopole is smoothly curved to avoid right-angle or abrupt bendings such that smooth variations of the excited surface currents thereon can be obtained. In this case, it is expected that the antenna's near-field radiation can be decreased. When compared with a corresponding monopole antenna with one or more right-angle bendings, the obtained results show that the proposed antenna can have lower specific absorption rate values by at least 1.0 dB, which is mainly owing to the decreased near-field radiation. Detailed results are presented and discussed.