Novel Wideband MIMO Antennas That Can Cover the Whole LTE Spectrum in Handsets and Portable Computers

Abstract

A dual resonant antenna configuration is developed for multistandard multifunction mobile handsets and portable computers. Only two wideband resonant antennas can cover most of the LTE spectrums in portable communication equipment. The bandwidth that can be covered by each antenna exceeds 70% without using any matching or tuning circuits, with efficiencies that reach 80%. Thus, a dual configuration of them is capable of covering up to 39 LTE (4G) bands besides the existing 2G and 3G bands. 2 × 2 MIMO configurations have been also developed for the two wideband antennas with a maximum isolation and a minimum correlation coefficient between the primary and the diversity antennas.

Multi-Slot Antennas Excited by Novel Dual-Stub Loaded Microstrip Lines for 4g Lte Bands

“…There has been an enormous effort devoted to the development of new and innovative antennas for smartphones, tablets, laptops, and various other mobile devices. Typically, planar monopoles made of meandered strips, planar inverted-F antennas (PIFA) and slot-based antennas are popularly used in these devices or in base stations [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. A general technique that is applied in many designs is the integration of two or more elements to obtain dual-band operation to cover the lower (around 900 MHz) and upper (around 2 GHz) bands of the large LTE spectrum.…”

“…A general technique that is applied in many designs is the integration of two or more elements to obtain dual-band operation to cover the lower (around 900 MHz) and upper (around 2 GHz) bands of the large LTE spectrum. In [6], two narrow slotted metallic arms with different lengths, connected together by a shorting metallic strip, are discussed where the longer arm covers the frequency band from 698 MHz to 1510 MHz, and the shorter arm covers the high frequency band (1.52-3.8 GHz) of the LTE Spectrum. Dual strip-based [7][8][9], double U-shaped patch-based [10] and slot-meandered [11] antennas are designed to cover upper and lower LTE bands.…”