నైరూప్య

Folded Metal Plate Monopole Antenna for Multiband Operation in the Mobile Phone

K.Latha Y.V.B.Reddy, A.M.Prasad, K.Veeraswamy

A coupled feed printed mono pole antenna with low profile yet covering the three LTE, four GSM, and UMTS band operation in the mobile phone is presented. Wideband operation with low profile is possible by exciting the monopole’s wide radiating plate using coupled feed and short-circuiting it to the system ground plane of the mobile phone through a long meandered strip as an inductive shorting strip. The coupling feed contributes to a wide operating band to cover the frequency range of 1710 to 2690 MHz for the GSM 1800/1900/UMTS/LTE2300/LTE2500 operation. The inductive strip and dual band behaviour results in the generation of a wide operating band to cover the frequency range of 698 to 988 MHz for LTE-700, GSM-850, GSM-900. The planar monopole can be directly printed on the bottom no-ground portion of the system circuit board of the mobile phone and is promising to be integrated with a practical loudspeaker. The proposed antenna, including its planar and folded structures, are suitable for slim mobile phone applications.