Dual-feed, single-CCE antenna facilitating inter-band carrier aggregation in LTE-A handsets

A dual-feed single-element antenna based on a capacitive coupling element is proposed as an antenna solution facilitating the use of inter-band carrier aggregation in LTE-Advanced mobile handsets. The antenna operates at the frequency bands 698-960 MHz with the lower frequency antenna feed and at 1710-2690 MHz with the higher frequency feed. No separate radiating elements associated with the two antenna feeds are needed because the signal paths for the different frequencies are isolated by using a novel diplex matching circuit. The general performance of the proposed antenna is good, with total efficiency better than 54% across the operation frequencies in free space. The isolation between the feeding ports is good, and it does not deteriorate due to the proximity of a user´s hand in typical hand grip situations.