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We significantly diminish the interference between the radiating elements for a miniature MIMO antenna system on the basis of composite right- and left-handed transmissionline(CRLH-TL). The element radiating structure has capacitively coupled parallel metal parts and slotted ground that correspond to the CRLH-TL to prohibit the volume from growing for an LTE high band. The metal line suspended over...
A fully-printed compact dual-band unequal power-divider is proposed. The branch lines with different impedances of the power-divider are replaced by small metamaterial phase-shift lines having +90° for UHF-band and −90° for WiMAX-band. Also, the CRLH property and the agreement between simulation and measurement are shown. The size is reduced by 3∼7times from the quarter-wavelength types.