The Implementation and Measurement of Carrier Aggregation Antenna

• Main Authors: Ji-Yu Shih, 史繼宇
• Other Authors: Yi-Guang Jan
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/dkn6y6

碩士 === 淡江大學 === 電機工程學系碩士班 === 102 === Basically monopole antenna is implemented in the current cell phones; it first in this study discusses the measurement process in the characterization of monopole antenna and then investigates the transmission characteristics of the antenna between its input and output ports. The implementation of the monopole antenna at center frequency of 1.84 GHz or at 2.6 GHz is then considered to find the relationships between the copper line diameters, line lengths and line curvatures etc. The isolation between antennas implemented in the same plane is then measured to validate the result that the longer the separation between antennas the better of their isolations. Carrier aggregation has been considered in LTE-A system to aggregate many component carriers to increase user’s transmission speed. It is the main task in this study to implement carrier- aggregated antennas. The design of octahedron antenna is considered and implemented on different planes but on the same template. The characteristics of implemented octahedron antennas such as the resulting antenna center frequency, bandwidth and antenna performance are all measured and compared. The process or the procedure to shift the carrier center frequency if it occurs carrier frequency offset or the tuning of the antenna to have its bandwidth increased are also studied. The separation angle between antennas implemented in the octahedron template is varied to investigate the resulting isolation between antennas at each possible separation angle. It concludes that in order to meet the LTE-A system requirement it needs to have greater than 90 degrees separation angle between antennas. 90 degrees separation angle is used in the final implementation of carrier-aggregated antennas.