A hybrid multi-mode narrow-frame antenna RF/Antenna Cable for WWAN/LTE metal-rimmed smartphone applications is proposed in this paper.The ground clearance is only 5 mm $ imes45$ mm, which is promising for narrow-frame smartphones.The metal rim with a small gap is connected to the system ground by three grounded patches.This proposed antenna can excite three coupled-loop modes and one slot mode.
By incorporating these four modes, the proposed antenna Leg Desk w/Storage can provide coverage for GSM850/900, DCS/PCS/UMTS2100, and LTE2300/2500 operations.Detailed design considerations of the proposed antenna are described, and both experimental and simulated results are also presented.