A new dual-band monopole antenna with a wide and adjustable emission-suppression band

In this paper, a low-profile planar dual-band monopole antenna is proposed for modern digital devices having a high-speed Wireless Local-Area Network (WLAN) along with a mobile communication module. The proposed antenna is embedded with a chip inductor to produce the dual-band characteristic. As a special and attractive merit, its lower frequency band can be easily adjusted while its higher frequency band very far away is keeping steady. In addition, the profitable omni-directional radiation property is the direct nature of such a monopole antenna. A prototype of the antenna was constructed and studied. Measured and simulated results were obtained to demonstrate the promising performance required for practical uses.