Efforts are laid to investigate the performance of Silver Nano Particle ink patch antenna for 5G applications. This paper presents the design, fabrication and characterization of an Ultra-wideband silver nano particle (Ag Np) ink screen printed 1X2array patch antenna used in 5G applications. For justification, the patch antenna is basically simulated using Ansoft High Frequency Structure Simulation (HFSS) software and analyzed using transmission line feed technique at range of 24 GHz. The designed antenna is then fabricated using the screen printing method on a FR-4 substrate. Characterization of the antenna was performed by evaluating various parameters like return loss, VSWR, radiation pattern, gain and band width. The experimental results are noted to be in line with the simulated results and for further validation purposes, a copper patch antenna was also designed, fabricated and characterized under the same working conditions. A comparative performance study of both the antennas is made to justify the use of the designed antenna in 5G applications.

In this communication, a novel optimisation technique is proposed for converting a multi-band Multi-Input Multi-Output (MIMO) antenna into an Ultra-Wide Band (UWB) (3.1 - 10.6 GHz) MIMO antenna. The methodology depends upon the ground plane’s alterations, notably the two variables (BP1 and BP2) presented as finger-like protrusions. The optimisation technique is used to optimise these variables to convert the MIMO antenna operating at multiple bands as a UWB MIMO antenna with an isolation of -20 dB. The complex multiple objective design task is now converted as an optimisation task using a random search-based Adaptive Multi-Objective Algorithm (AMOA). This optimisation process was designed to accomplish some performance specifications, i.e., S11 is lesser than -10 dB from 3.1 to 10.6 GHz, and an enhancement in isolation of -20 dB in the operating UWB. The parameters selected in this task should be chosen randomly from their limits. The proposed AMOA technique successfully attained the given multi-objective task by obtaining an ultra-wideband with a peak gain of 2 dB and reduced coupling to -20 dB. All the achieved results confess that the introduced optimisation technique is suitable for compact MIMO antenna design. The simulated UWB MIMO antenna is fabricated on FR-4 substrate and tested in an anechoic chamber at a few commercial bands and IoT applications, such as WLAN (3.6 GHz), Wi-Fi (5.0 GHz), and Industrial Scientific and Medical band (5.8 GHz).

In this article, S-band tapered magnetically insulated line oscillator (MILO) with partially dielectric loaded cavities is proposed to improve the overall efficiency of the MILO device. In the proposed structure, the tapered interaction cavities of the MILO are partially filled with the low loss dielectric material. An equivalent circuit analysis is performed to get the dispersion characteristic of the resonating structure of the proposed MILO. An extensive simulation study is carried out to get electromagnetic (EM) and RF behavior of the proposed structure using 3D EM simulation tool (i.e., CST Studio Suite). The EIGENMODE solver of the CST is used to get the dispersion characteristic of the resonating structure which are also used to validate the device design parameters. The RF behavior of the proposed structure with and without dielectric loading is investigated using CST's particle-in-cell (PIC) solver. The modelled structure is simulated with 500 kV diode voltage and 35 kA diode current. The PIC simulation predicts that the without dielectric loading the modelled device generates ~2.4 GW average power at center frequency 2.65 GHz in TM01 mode with an electronic efficiency of ~13.71%. While with dielectric loading, the modelled device generates an average power of ~3.38 GW at frequency 2.56 GHz with overall efficiency of 19.3%. In this study, for the first time we have explored the S-band tapered MILO with partial dielectric loading and the effect of cathode misalignment on RF output power which has not yet been reported anywhere.

In this communication, a compact (30×30×1.6 mm3),and dual-port MIMO (multiple-input-multiple-output) antenna is observed with gain and isolation enhancement for X-band satellite communications. Four antennadesigns (A1-A4) are systematically examined andanticipation of the proposed antenna (A4) hasbeen significant for choosing antenna parametersand operations. A dual-band behavior at (8.81-9.35) GHz and (10.66-12.13) GHz with impedancebandwidth of 5.94 % and 12.90 % respectivelyfor port-1, and (8.83-9.33) GHz and (10.60-11.40)GHz with impedance bandwidth of 5.50 % and7.27 % respectively at port-2 is observed, andfurthermore achieved the dual-resonances has9.13 GHz and 10.93 GHz with peak gain of 5.54dBi and 5.48 dBi respectively at port-1, and 9.06GHz and 10.86 GHz with peak gain of 5.35 dBiand 5.75 dBi respectively at port-2. The proposedantenna has measured isolation = -20 dB, ECC <0.015, DG between (9.993-9.999) dB, TARC < -10dB, antenna gain varies in the range of (5.35-5.75)dBi, VSWR is close to 1 and less than 2, groupdelay varying between (-0.90 to 0.40) ns andradiation efficiency is more than 70 % is obtainedduring the entire operating frequency bands. Thesimulated and measured results of the proposedantenna have been validated and minor deviationbetween simulated and measured results has beenobserved. The novelty of the proposed MIMOAntenna has a lesser size with highly isolated(between the ports), enhanced gain and betterTARC as compared to reference Antenna’s (citedin table 3) has been proposed.

The deployment of a telecommunications network has become more colossal than before because of the complexity of the network and the rapid enhancement of technology. Optical transport networks are today the basic infrastructure of modern communications systems for the transfer of data between nodes. Before each deployment, engineering will take over designing and calculating each part of the network in order to optimize transmission resources, from TDM technology to WDM the bandwidth efficiency and relative costs for 100 Gb/s WDM transport and switching architectures is a the main challenge for telecommunication network. several studies have been published for several architectures, A10Gbit/s PON(Point a Multipoint) based on TDM was demonstrated with different length of fiber was implemented with a various budget.The purpose of this paper is to present the study and design of a TDM link with a bit rate of 10Gbit/s and WDM with 80Gbit/s transmission bit rate using ROADM architecture to exploit in telecommunication networks, which can be proposed as a solution for two potential different area.