Contour-Integrated Dual-Band Compact Antenna Elements and Arrays for Low-Profile Mobile Terminals

Novel antenna element and array designs with very small space occupation for low-profile mobile applications are presented. The proposed antennas can be integrated at the contour of mobile devices. The antennas operate in two frequency bands around 2.4 and 5.5 GHz, corresponding to the common wireless local area network (WLAN) bands. By utilizing multiple resonance structures, the bandwidth in the lower frequency band reaches up to 200 MHz. Therefore, the long-term evolution (LTE) frequency band at 2.3 GHz is also supported. A two-element contour-integrated compact antenna array for multiple-input multiple-output (MIMO) communication systems with good MIMO performance is realized by implementing appropriate decoupling strategies. All proposed antennas are manufactured and measured. Compared to conventional design approaches, the proposed approach is advantageous in several respects, e.g., the radiation elements occupy much less space and its operation is independent from the shape of the chassis. The design approach is applicable for all ultra-thin devices with conducting contours.