Multiband Handset Antenna System for UMTS/LTE/WLAN/Sub-6 5G and mmWave 5G Future Smartphones

Abstract

In this paper, a new antenna system for rapidly emerging multifunction devices is presented. The proposed antenna system consists of four antenna components each one operating at different frequency bands separately. The designed antennas are isolated and integrated on a single substrate. The first antenna is designed to operate at 1920–2170 MHz covering the UMTS band, whereas the second antenna is proposed for the lower band 5G systems and WiMAX operating within the frequency range of 3.4–4.2 GHz. Furthermore, another antenna is designed to cover the higher band 5G system and the IEEE 820.11a WLAN within the frequency range of 5.1–5.85 GHz. Finally, a 28 GHz bowtie-based MIMO antenna array is designed and simulated for the mmWave future 5G mobile networks. The proposed antennas were designed and simulated by using CST microwave studio. The results showed that all of the proposed antennas exhibited excellent reflection characteristics below −20 dB at the resonant frequency and achieved high radiation efficiency reached 99% in some cases with a peak gain ranging between 4–6 dBi. The proposed antenna system helps smartphones to perform multitasks and achieve a better-quality operation especially with the enormous growth of IoT techniques.

Optimizing Multiple Beam Patterns for 5G mmWave Phased Array Applications

“…Other methods used switched beam approaches [9] to realize multiple beams. Some specific shapes like flattop, cosecant-squared, sum, or any other array patterns can be obtained by modifying the corresponding excitation amplitudes and phases of the array elements [1,10,11]. It is found, in general, that the optimization algorithms are more suitable than the analytical methods for shaping the multiple beam patterns.…”

Dual-Band Mimo Antenna With Defected Ground Structure for Sub-6 GHZ 5g Applications

“…Furthermore, the newly emerged high speed Internet of Things (IoT) applications are becoming dependent directly on mobile internet and require high data rate services that must be available in a large coverage area. Such urgent needs concern the mobile manufacturers and researchers worldwide to find a feasible and effective systems that meet all these requirements [2].…”