摘要
A full metal housing antenna for tablet to cover the GPS and WLAN b/g/a bands(1565-1585,2412-2484 and 4920-5825 MHz) is presented. The cavity is created by the enclosed volume of PCB and metal housing of the tablet. The cavity is properly excited by a flat exciting element w ith dimensions of only 36×4mm^2 positioned at an open slot betw een PCB and metal housing at the tablet's top surface. Among many excited cavity mode resonances,the ones close to the target frequency bands w ere selected and properly adjusted by adding grounding vias and shorting strip based on the E field distributions. This unique cavity mode excited antenna has measured-6dB return loss bandw idth of 1500-1600MHz,2380-2500 MHz,4580-5960 MHz and the average efficiencies for all the three bands are over 50%. Therefore,it overcomes the efficiency degradation issue that traditional IFA or monopole antennas are facing at the full metal housing environment.
A full metal housing antenna for tablet to cover the GPS and WLAN b/g/a bands(1565-1585,2412-2484 and 4920-5825 MHz) is presented. The cavity is created by the enclosed volume of PCB and metal housing of the tablet. The cavity is properly excited by a flat exciting element w ith dimensions of only 36×4mm^2 positioned at an open slot betw een PCB and metal housing at the tablet's top surface. Among many excited cavity mode resonances,the ones close to the target frequency bands w ere selected and properly adjusted by adding grounding vias and shorting strip based on the E field distributions. This unique cavity mode excited antenna has measured-6dB return loss bandw idth of 1500-1600MHz,2380-2500 MHz,4580-5960 MHz and the average efficiencies for all the three bands are over 50%. Therefore,it overcomes the efficiency degradation issue that traditional IFA or monopole antennas are facing at the full metal housing environment.
基金
Sponsored by the Shanghai"Eastern Scholarship"(Grant No.B.60-D107-14-201)
Shanghai "1000 Plan"(Grant No.S.39-0107-15-204)
