Hammad M. Cheema
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Additively manufactured polyethylene terephthalate-based high-gain multiband-flexible antenna for wireless mobile applications Open
This paper presents a novel additively manufactured antenna array on a flexible polymeric substrate for conformal mobile applications. The antenna consists of two identical z-shape patch elements integrated with symmetrical arrangements an…
An end-to-end approach to detect railway track defects based on supervised and self-supervised learning Open
Railway infrastructure is critical for the safe and efficient transportation of goods and people. However, defects in rail tracks can lead to severe accidents, resulting in significant human and financial losses. This study presents the de…
View article: Real-time precision spraying application for tobacco plants
Real-time precision spraying application for tobacco plants Open
This paper introduces a precision agriculture application aimed at mitigating the excessive utilization of agricultural chemicals, including pesticides and fungicides during crop spraying. The prevailing spraying techniques face two princi…
Beam Steerable Half Mode SIW Leaky-Wave Antenna Using FPMS Open
A novel leaky wave antenna (LWA) with integrated field-programmable microwave substrate (FPMS) unit cells is presented in this article. The proposed antenna consists of a Half Mode Substrate Waveguide (HMSIW), loaded with cross-shaped slot…
Substrate Integrated Waveguide Antenna System for 5G In-Band Full Duplex Applications Open
In-band full duplex offers a new approach of meeting the ever-increasing data rate demands by operating the transmitter and receiver at the same frequency at the same time, potentially doubling the spectral efficiency. However, self-interf…
Single feed dual-band RHCP dielectric resonator antenna for GNSS applications Open
A single-fed right-handed circularly polarized (RHCP) dielectric resonator antenna (DRA) with in-band filtering for Global Navigation Satellite Systems (GNSS) application is proposed. The design is implemented by placing rectangular DR mat…
A Miniaturized Cavity backed Archemedian Spiral Antenna for mm-Wave Applications Open
Design of a UWB circularly polarized, cavity-backed Archimedean spiral antenna is presented in this paper. The antenna is designed for 18- 40 GHz frequency range with a binomially tapered parallel-strip to microstrip balun and RF foam abso…
Ultra-wideband, Wide Angle, Asymmetric Transmission based Chiral Metasurface for C and X Band Applications Open
A multi-layered chiral device manifesting asymmetric transmission (AT) facilitating one-way channeling of electromagnetic (EM) waves, based on the inherent polarization is presented. The designed metasurface depicts a high transmission con…
Quad-Band 3D Rectenna Array for Ambient RF Energy Harvesting Open
This paper presents a quad-band, 3D mountable rectenna module for ambient energy harvesting. With the aim of powering up Internet of Things (IoT) nodes in practical ambient environments, a hybrid approach of combining power, both at RF and…
A Wideband Tunable Power Divider for SWIPT Systems Open
A two-way tunable power divider for Simultaneous Wireless Information and Power Transfer (SWIPT) is proposed in this paper. The power divider divides the incoming power in such a way that maximum power is utilized for energy harvesting pur…
View article: EMI shielding properties of polymer blends with inclusion of graphene nano platelets
EMI shielding properties of polymer blends with inclusion of graphene nano platelets Open
Polymer blends of poly vinyle chloride (PVC) and polyaniline (PANI) with the inclusion of graphene nano platelets (GNP) are fabricated to enhance the EMI shielding effectiveness. The initial assessment with cyclic voltammetry has shown imp…
RF Energy Harvesting for Ubiquitous, Zero Power Wireless Sensors Open
This paper presents a review of wireless power transfer (WPT) followed by a comparison between ambient energy sources and an overview of different components of rectennas that are used for RF energy harvesting. Being less costly and enviro…
Disposable, Paper-Based, Inkjet-Printed Humidity and H2S Gas Sensor for Passive Sensing Applications Open
An inkjet-printed, fully passive sensor capable of either humidity or gas sensing is presented herein. The sensor is composed of an interdigitated electrode, a customized printable gas sensitive ink and a specialized dipole antenna for wir…