An Antenna With a Stair-Like Ground Branch for Octa-B and Narrow-Frame Mobile Phone

作者：Liu, Ying^*; Luo, Yi; Gong, Shuxi

来源：IEEE Antennas and Wireless Propagation Letters, 2018, 17(8): 1542-1546.

DOI：10.1109/LAWP.2018.2853410

• Inductors
• mobile phone antenna
• narrow frame
• octa-band
• small nonground portion

An antenna with a small nonground portion (56 x 5 mm(2)) for 5.7 in octa-hand mobile phones is presented in this letter. Owing to the stair-like ground branch, the width of the nonground portion is 5 mm (0.013 lambda(g) at frequency 0.8 GHz), and the area of ground clearance is only 280 mm(2). By utilizing the space with a small value of the electric field, the antenna's size can be reduced without worsening the performance. The optimized structure can generate the high band that covers GSM1800,GSM1900, UMTS, LTE2300, and LTE2500 hands (1710-2690 MHz). Moreover, a double-resonant mode is generated in the low band for LTE700, GSM850, and GSM900 bands (704-960 MHz). A prototype is fabricated, and the measured -6 dB impedance bandwidths are 310 MHz (690-1000 MHz) and 1270 MHz (1680-2950 MHz). Meanwhile, the measured patterns, efficiencies, and gains are also obtained. This antenna is promising to utilize in the future.

• 出版日期2018-8
• 单位西安电子科技大学