Wide-Band Frequency Tunable Antenna for 4g, 5g/Sub 6 GHZ Portable Devices and Mimo Applications

Abstract

A compact (25×28×1.57 mm 3 ) and wide-band multimode frequency tunable antenna with a defected ground structure (FRDGS) for 4G and 5G conformal portable devices and multi-band wireless systems is presented in this article. In a previous study, frequency reconfigurable antenna designs only used the method of adding slots on the patch or ground. In this study, a combination of multiple slots, partial ground, and defective ground structure techniques are utilised to attain the advantages of compactness, wide impedance bandwidth, and steady radiation pattern. Multiple slots on the top layer of the substrate and F-shaped slot etched at the bottom make the proposed antenna. Two PIN diodes are inserted in the F-shaped slot for frequency reconfiguration, allowing the antenna to switch between different resonances. Ansys high frequency structure simulator 15.0v is used to simulate the antenna parameters. This antenna performance is demonstrated using measured and simulated data. The simulated and measured results clearly show that the proposed antenna can switch among six dissimilar resonant frequency bands via various modes of operation across the frequency spectrum from 2.3 to 8.9 GHz. The antenna works in a variety of commercial bands, such as WLAN/Bluetooth (2.4-2.5 GHz), LTE/4G (2.3-2.7 GHz), S-band (2-4 GHz), Radio Navigation (2.7-2.9 GHz), and 5G/sub-6 (3.3-4.9 GHz), according to simulations and experiments. The proposed design features narrowband, wideband, and ultra-wideband properties with a consistent radiation pattern, adequate gain (1.6 to 5.8 dB), and high radiation efficiency (86 to 94%) in a small package. Furthermore, the performance comparison of the proposed antenna with that of the state-of-the-art antennas in terms of compactness, frequency reconfigurability, number of operating bands, and impedance bandwidth demonstrates the novelty of the proposed antenna and its potential application in multiple wireless applications.

Compact Multiband Reconfigurable MIMO Antenna for Sub- 6GHz 5G Mobile Terminal

“…Furthermore, the recent COVID-19 pandemic highlighted the importance of high throughput network connections for remote working. It is foreseen that the release of Fifth Generation-New Radio (5G-NR) sub-6 GHz spectrum [3,4] using MIMO technology will further advance mobile communications towards 5G [5]. This technology triggered research into MIMO antennas, as this will enable wireless devices with such features in 5G to operate with excellent system throughput and intensive data processing capability.…”

A New Diminutive Wide-band MIMO Antenna with Frequency Agile Features for 4G and 5G Diverse Wireless Applications

“…As portable devices are becoming lighter and thinner by the day, a typical MIMO antenna for 5G devices should meet specified criteria like compact structure with high gain, steady radiation pattern, and low envelop correlation [4]. The most effective way to make MIMO compact is to replace multiple fixed-performance antennas of MIMO with frequency-reconfigurable antennas, which provide coverage for several wireless applications on the same platform based on switching conditions [5]. FRA also aids in maintaining high data rate and adequate isolation between antenna units within MIMO [6].…”