A NOVEL COMPACT DUAL-FREQUENCY MONOPOLE ANTENNA FOR QUAD-BAND MOBILE TERMINAL APPLICATION

摘要

A novel compact dual-frequency monopole antenna with a parasitic radiating strip is presented. The antenna with a height of only 6.5 mm, printed on the upper board and side board, is vertically placed at the upper-left corner of the main board to reduce the occupied area of the main board. A parasitic strip with meandered structure is added into the antenna, and hence, the dual-frequency characteristic is achieved to broaden the bandwidth. The measured -10 dB impedance bandwidth is 960 MHz (1920-2880 MHz), covering the UMTS (1920- 2170 MHz), WiBro (2300-2400 MHz), WLAN (2400-2483 MHz), and WiMAX (2500-2690 MHz) bands. Thus, the proposed antenna is suitable for multisystem mobile terminal applications.