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

Abstract

A low-profile dual tuning stub loaded microstrip line-fed multi-slot antenna is presented in this paper, which covers most of the significant 4G LTE bands from 850 MHz to 2800 MHz and beyond. The slot antenna consists of three wide slot sections: two orthogonal slots and a circular slot at the junction of those two slots. This multi-slot antenna is excited by a microstrip feed line loaded with dual stubs, which is on the other side of the dielectric substrate. The stubs are terminated across the width of orthogonal slots. Two of these slots along with feed lines are placed on two corners of the ground plane for pattern diversity. Numerical simulation and measurement results on a fabricated prototype demonstrate excellent agreement in scattering parameters. Good port isolation and gains are also obtained. This design is suitable for use in LTE mobile terminals.

Multi-slot Antennas Excited by Novel Dual-stub Loaded Microstrip Lines for 4G/5G Bands

“…Additionally, it also covers 1850-1910/1930-1990 MHz (Personal Communications Service -PCS Band), and 1710-1755/2110-2155 MHz (Advanced Wireless Services -AWS Band). This increased range of frequencies is not covered by the previously reported dual stubs-based slot antennas [23,24]. Remarkably, this antenna covers the newly released 5G new radio (NR) frequency bands: n77 to n79 frequency bands, beyond the 4G/LTE frequencies.…”

“…Still, this is quite challenging in low-profile antennas for handheld devices due to limited space. In the proposed design, pattern diversity is achieved by exciting two complementary sets of slots at the two lengthwise edges of the ground plane, like [24]. Multiple slots are excited for this purpose with a consistent measured port isolation below −18.5 dB over the entire frequency band of operation.…”

Integrated LTE and Millimeter-Wave 5G MIMO Antenna System for 4G/5G Wireless Terminals

“…In addition, for the rapid transmission of data wirelessly, it is necessary to have a wider bandwidth and a higher data rate. Several reported works demonstrate the efforts of researchers to satisfy users' expectations of high-throughput for 4G and LTE (Long Term Evolution) communication applications [3][4][5][6][7]. Subsequently, this has promoted the development of next-generation 5G mobile and broadband wireless communication, featuring higher the integrated antenna solutions reported in the literature and discussed above (except [34]) have not received SAR or PD analysis, which is an important performance metric to validate the antenna design as a safe solution, as per international human safety regulations.…”

“…In addition, for the rapid transmission of data wirelessly, it is necessary to have a wider bandwidth and a higher data rate. Several reported works demonstrate the efforts of researchers to satisfy users’ expectations of high-throughput for 4G and LTE (Long Term Evolution) communication applications [ 3 , 4 , 5 , 6 , 7 ]. Subsequently, this has promoted the development of next-generation 5G mobile and broadband wireless communication, featuring higher data rates and greater channel capacity compared to 4G/LTE [ 8 , 9 ].…”

“…Recently, various works on 4G/LTE and 5G antenna design have been reported in the literature on rigid and conformal substrates [ 3 , 4 , 5 , 6 , 7 , 17 , 18 , 19 , 20 , 21 ]. It can be noticed that most of the proposed antenna solutions are either single-element or antenna arrays.…”