The antenna without embedding an FSS exhibits notch frequency gain of −2.6 dBi (measured), and after inclusion of an FSS layer behind the antenna, the notch frequency gain has been further reduced to −7.6 dBi (measured) due to the destructive interference between the reflected back radiations of the antenna by the FSS with the forward radiation of the antenna. Summary A band-notched super wideband (SWB) planar monopole antenna with improved notch characteristics is proposed in this article. A hexagonal SWB antenna operating in the frequency range from 3.04 to 36 GHz is initially de ..read more

In this article, a four-port multiple-input multiple-output (MIMO) antenna with self-coupling-self-decoupling (SCSD) mechanism has been designed. The design primordial feature that constitutes parasitic constrictors (PCs) which act as SCSD has been strategically implemented. The design has a uniplanar printed structure, in which the radiator and reflector are printed on the same reference plane. The antenna operates from 2.9–5.45 GHz with isolation >25 dB, compatible for C-bands. The diversity parameters are evaluated for indoor, outdoor, and isotropic propagation with discrete statis ..read more

This work introduces a novel integrated communication system that combines the cell-free model and unmanned aerial vehicles (UAVs) serving as aerial relay stations (ARSs) for application in various real-life scenarios of 5G and beyond. These scenarios include densely populated areas, smart cities, events, festivals, and search and rescue operations. The power optimization problem is effectively addressed for both uplink and downlink through the successive convex approximation (SCA) method, second-order cone program (SOCP), and linear program. Summary A cell-free (CF) technology and unmanned ..read more

Very low profile frequency and pattern reconfigurable antenna is presented for K band applications. The overall dimension of the antenna is 11 × 11 × 0.787 mm. The antenna radiates from 18.5 to 26.25 GHz band with more than 5 GHz (−10 dB) bandwidth and 45° and 135° beam directions for all states. Summary A novel pattern reconfigurable antenna is proposed in this letter. The overall dimension of the antenna is 11 × 11 × 0.787 mm. The proposed antenna is fabricated on Rogers RO4003C substrate. The antenna has two meandered monopoles and two straight monopoles. Two PIN diodes are connected betw ..read more

An adaptive coalition using Kullback–Leibler divergence (KLD)-based cooperative spectrum sensing scheme (KLDCSS) with a nominal sensing time to optimize the spectral efficiency is presented. In the proposed sensing scheme, the cooperating SUs are adaptively allocated to different coalitions to maximize the throughput efficiency. An adaptive coalition and user allocation algorithm are proposed to optimize the average opportunistic throughput and diminish the sensing overhead. Summary Effective, reliable, and rapid spectrum sensing in concordance with maximum throughput efficiency is necessary ..read more

This paper presents a small triple band monopole antenna for Internet of Things (IoT) applications. The geometry of the proposed antenna consists of monopole element with feed line, stubs, and improved ground plane to obtain three independent operating bands for industrial, scientific, and medical (ISM)/3G, 4G/5G, and Wi-Fi/extended 5G. The antenna has been realized, and experimental results are found to be satisfactory with close proximity to the simulated one, which ensures its ability to work for various IoT portable applications in modern communication system. Summary This paper presents ..read more

The proposed deep learning (DL)-based antenna selection for multiple input multiple output (MIMO) software defined radio (SDR) system is used to select the optimal antenna. The DLDS framework is implemented which incorporates with the SDR environment for providing intelligents decision, which reveals that the approach of data-driven resolution-making performs in the approach of optimization-driven resolution-making. The structure of DLDS involves three sections namely, data communication section, data/logic processing section and the DL decision section. The MIMO SDR environment can communica ..read more

Figure 4 indicates about the flowchart intimation of LNA-based MOSFET, the initial stages of the design scheme, the choice of technology is determined to be the 65 nm node. Subsequently, bias simulations are conducted, aiming to achieve optimal performance. During this phase, a meticulous readjustment of DC bias points is carried out. The primary goal is to meet the specified current requirements. If this target is successfully attained, the subsequent step involves preparing the variables within ranges based on their respective constraints. However, if the required current is not met, a furt ..read more

Flowchart of the proposed system: The simulation was carried out using NS-3.38 and MATLAB, and the results reveal that the suggested protocol, HACOFLM, outperforms ODMRP, OFAODV, MAODV, and DFMCRP through packet delivery ratio, latency, control packet overhead, and throughput. Summary A vehicular ad hoc network (VANET) is a wireless network composed of a collection of mobility devices that link via a wireless channel without the need for permanent infrastructure or centralized administration. Multicasting is a method of sending data from a single node to multiple recipients at the same time ..read more

An enhanced optimized layered diagnosis framework (OLDF) is proposed for detecting, diagnosing, and classifying sensor node faults. OLDF utilizes a deep belief network (DBN) with chaos quantum-behaved particle swarm optimization (CQ-PSO) for efficient diagnosis and classification of various sensor faults in the network. Summary Node faults are often influenced by factors such as physical component failure, communication module errors, battery exhaustion, and environmental factors. Various researchers have contributed to addressing the problem of detecting, diagnosing, and classifying faults ..read more