High gain antenna for n260- & n261-bands and augmentation in bandwidth for mm-wave range by patch current diversions

Abstract

Purpose A compact low-cost antenna structure is proposed to augment the impedance-bandwidth in mm-wave range. Beside it, the paper also aimed to enhance high gain for n260 and n261-bands, suitable for futuristic communication systems. Design/methodology/approach Design consists of radiating patch and a partial ground plane with semi-circle arc for smooth flow of current. The lower corners of patch are gradually clipped away to make the patch nearly elliptical. Further, two tilted slots at an angle α = 15° are etched at the edges of the patch to augment bandwidth for mm-wave range. These slots divert the periphery current of semi elliptical patch towards center portion of antenna which ensures the participation in radiation of central portion of patch. The upper corners are also clipped away to limit the copper losses and smoothly flow of current. The proposed antenna is designed using HFSS and it is structured on inexpensive FR4 substrate of size 27.5 × 20 mm2. Findings It supports enormous −10 dB bandwidth of 5.86–40GHz (148.89%) even though use of high loss-tangent material and high gain for 28 GHz (27.50–28.35 GHz) n261–band and 37 GHz (37–38.6 GHz) and 39 GHz (38.6–40GHz) n260–bands with a peak-gain of 8.76 dBi, 10.8 dBi and 9.92 dBi, respectively. Originality/value The proposed methodology of design is very useful to enhance impedance bandwidth to cover all C–, X–, Ku–, K– and Ka–band even though use of low cost material with high loss tangent. In recent literature, the designs were implemented with a costly material and having very low loss tangent and covers partial suggest bands.

Improvement in Depth–of–Return-Loss and Augmentation of Gain-bandwidth with Defected Ground Structure For Low Cost Single Element mm–Wave Antenna

“…As a result, there is significant frequency congestion at lower spectrum levels. Therefore, in order to prevent interference within the current spectrum, the World Radio Communications (WRC-19) & Federal Communication Commission (FCC) [1], [2] have jointly suggested a new spectrum of 24-42.5GHz in lower mm--Wave range for 5G and beyond [3] communications. In highly populated locations, this broader spectrum can be easily applied to a range of futuristic uses.…”

“…In highly populated locations, this broader spectrum can be easily applied to a range of futuristic uses. These could include unmanned robotic machines, Internet of Things (IoT) [1], [4], and Local Multi-point Distribution Services (LMDS). Nevertheless, the substantial transmission losses of mm-Wave communication systems limit the signals for short-range and indoor systems.…”

Improvement in Depth of Reflection Co-efficient below -20 dB for Millimeter–Wave Antenna

“…The mm-wave communication will be realistic in the nearby future after resolving the key issues related to it [1][2][3]. The mm-wave antennas are needed for high data rate communication as discussed in [4].…”