Corner Bent Integrated Design of 4g Lte and Mmwave 5g Antennas for Mobile Terminals

Abstract

Co-design of corner bent Multiple-Input Multiple-Output (MIMO) antennas catering to 4G LTE and mmWave 5G applications is proposed. The 4G LTE MIMO antenna module consists of two element microstrip-fed slot antennas operating from 1.7 to 3 GHz with fractional bandwidth of 55%, which covers LTE1900, LTE2300, and LTE2500 bands. For mmWave 5G MIMO antenna module, two element Vivaldi antennas with wideband operating from 25 to 38 GHz and fractional bandwidth of 41% are proposed. The mmWave 5G microstrip fed Vivaldi MIMO antennas exhibit orthogonal pattern diversity at 28 GHz with 1-dB gain bandwidth of 28%. The single element corner bent co-designed antenna is compact having dimensions of 14 × 51 × 0.254 mm 3. The 4G LTE and mmWave 5G antennas are electrically close to each other by 0.01λ at 1.7 GHz for minimal physical footprint. Co-designed 4G LTE and mmWave MIMO antennas are integrated inside a typical mobile case. Simulated and measured results are presented.

Extremely Close Integration of Dual Band Sub-6 GHZ 4g Antenna With Unidirectional Mmwave 5g Antenna

“…For realizing MIMO configuration, another integrated microwave and mmWave 5G antenna element can be introduced to the opposite corner of smartphone. Since the distance between two antenna elements will be electrically large, mutual coupling will be therefore minimal [4]. Table 1 provides a comparison between proposed antenna module and other recently reported antenna designs.…”

“…The design requirements are not that tight for a 4G antenna as these are electrically small, low efficiency omnidirectional radiators. In recent years, several designs have been published discussing the 4G-5G antenna designs [3][4][5][6][7]. Even though the design reported in [4] is built on a single substrate, the antenna might be incompatible with commercial mobile devices as these devices have a panel height requirement of 7 mm or less.…”

“…In recent years, several designs have been published discussing the 4G-5G antenna designs [3][4][5][6][7]. Even though the design reported in [4] is built on a single substrate, the antenna might be incompatible with commercial mobile devices as these devices have a panel height requirement of 7 mm or less. The shared ground published in [5] might have a compact solution to the antenna problem, but the slot radiators for 5G applications leads to low gain and radiation towards the user, when being activated.…”

Improved Isolation Metamaterial Inspired Mm-Wave Mimo Dielectric Resonator Antenna for 5g Application

“…In [15], with the help of corrugated metamaterial surface the isolation is improved, but the radiation pattern is not stable, and similarly in [16], a 4 × 4 MIMO antenna is proposed for 5G communication application. In [17], applications for 4G Long Term Evolution (LTE) and mm-Wave 5G are proposed for corner bent MIMO antennas. A MIMO mm-Wave antenna operating at 24 GHz is proposed in [18], which is ideal for wearable applications.…”

Printed 5g Mimo Antenna Arrays in Smartphone Handset for Lte Bands 42/43/46 Applications

“…Despite the above-mentioned positive aspects of a MIMO system, there are still many challenges for researchers in designing a compact multi-antenna system for mobile devices having better antenna performance in terms of low mutual coupling and envelope correlation coefficient (ECC) between the antenna elements [4]. In future 5G system below sub-6 GHz spectrum, long term evolution (LTE) communication bands LTE 42/43 (3400-3600 MHz/3600-3800 MHz) and LTE 46 (5150-5925 MHz) besides LTE 2300 (2300-2400 MHz) and LTE 2500 (2540-2620 MHz) have been adopted as standards for smartphones with a massive MIMO antenna array [5][6][7][8][9][10][11][12][13]. In a massive MIMO scheme, a relative large number of compact LTE antennas (N ≥ 6 or 8) arranged at the two sides of a mobile printed circuit board (PCB) with high antenna efficiency and low ECC should be adopted for operation in a 5G communication system [14].…”