Orthogonally polarized MIMO antennas for all bands of portable computers including digital TV

A dual antenna configuration has been developed for multi-standard multifunction portable computers. Two wideband antennas can cover a frequency band from 470 MHz to 3.6 GHz, which is divided into two sub-bands. The low-band antenna resonates from 470 to 960 MHz and the high-band antenna resonates from 1.57 to 3.6 GHz. There is no significant interference between the two antennas because of the frequency gap between them. The new antennas are unbalanced resonant antennas that do not need matching circuits. Two orthogonal low-band antennas and two orthogonal high-band antennas are used for polarization diversity in MIMO applications. The four antennas can be mounted in different configurations according to the size and the geometry of the portable computer.