A resonant mode (HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12δ</sub> ), other than those ( HEM xmlns:xlink="http://www.w3.org/1999/xlink">11δ</sub> and TM xmlns:xlink="http://www.w3.org/1999/xlink">01δ</sub> ) conventionally excited used in a cylindrical dielectric resonator antenna (CDRA) has been examined with view for using it as another radiating broadside radiation patterns. Excitation of the mode, being most challenging aspect,...

Experiments with probe-fed circular patches using conventional and defected ground planes flashed some interesting features relating to cross-polarized (XP) electric fields associated radiations before the present authors. Those led a series of new investigations for understanding nature XP deal them structure (DGS) improved performance. In first phase investigation, patch plane have been critically studied as function radial probe location. Remarkably significant effect is experimentally...

Microstrip patches and dielectric resonators (DRs) are two low-profile variants of modern microwave wireless antennas. However, the DR antenna (DRA) is relatively new still passing through stages development. Both quite similar in terms performance characteristics. This article focuses on a meaningful comparative study where we have considered all commonly used feed mechanisms such as coaxial probe, microstrip line, rectangular aperture for both antennas operating near same frequency....

Controlling higher order modes up to third harmonic of the fundamental operating frequency in a microstrip line-fed patch antenna has been successfully demonstrated. Harmonic rejection achieved at its feed level using highly compact design defected ground structure (DGS). Rejection characteristics have improved adding an open stub line. All possible occurring between and 3rd identified. Relative suppression radiated fields with without DGS-control quantitatively measured effective control...

Defected ground structure (DGS)‐integrated rectangular microstrip patch has been experimentally investigated with an aim to improve polarisation purity in radiated fields. Width length ratio (aspect ratio) of a attributes different characteristic features. Therefore present experimental studies have executed for four aspect values like 1.6, 1.3, 1.0 and 0.8. Folded defects employed H ‐plane. Possibility achieving high (over 25 dB isolation between co‐ cross‐polarised fields) improved...

A composite aperture has been conceived to excite cylindrical dielectric resonator antenna (CDRA) simultaneously with two different modes, resulting in broadside radiations at adjacent bands. Threefold objectives of this investigation includes: (i) realize HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12δ</sub> mode a practical CDRA without involving any unwanted hybrid mode; (ii) explore type feed, which serves as equivalent magnetic and...

A shaped defected ground structure (DGS) that is asymmetric in a specific radiating plane of microstrip element has been explored with view to addressing the cross-polarization (XP) issues. The configuration conceived from an insight inherent asymmetry modal fields underneath probe-fed patch and experimentally demonstrated as best possible design compared its predecessors terms reduction XP fields, angular span suppression around boresight, space occupied by defects. Different orientations...

This article presents a localized surface plasmon resonance (LSPR) phenomenon based optical fiber sensor (OFS) for the detection of dopamine (DA). DA functions as hormone and neurotransmitter in human body plays crucial role peripheral system. To develop OFS detection, taper probe was fabricated immobilized with silver nanoparticles (AgNPs) functionalized Polyethylene glycol (PEG). The developed shows great selectivity presence ascorbic acid (AA) oxidation due to PEG coating. morphology...

A label-free highly sensitive tapered Single-Mode-Multimode-Single-Mode (TSMS) structure-based optical fiber sensors (OFSs) is presented in this study for the detection of L-cysteine (L-Cys). Well studied biocompatible nanomaterials (NMs) including silver nanoparticles (AgNPs) and graphene oxide (GO) were synthesized immobilized over surface sensing probe using self-assembly method. Configurations involving excitation localized plasmon resonance (LSPR) phenomena proposed work are...

A newly developed localized surface plasmon resonance (LSPR) phenomenon-based cholesterol (Cho) sensor is reported in this article. Functional test of the proposed over an ultra-wide-range Cho concentration (0.1-10 mM) which covers human serum (~5.17 mM), revealing great performance executed. Further, different structures such as multimode-photosensitive-multimode (MPM) and single-photosensitive-single (SPS), also called core mismatch fiber structure are presented here for effective...

Fabrication and experimental validation of a newly developed copper oxide nanoparticles (CuO-NPs) silver (AgNPs) immobilized SM-MM-SM-MM-SM (SMSMS) in-line Mach-Zehnder interferometer (MZI) fiber structure-based sensor using localized surface plasmon resonance (LSPR) technique are reported in this article. The AgNPs CuO-NPs used to improve the biocompatibility sensitivity sensor. (NPs) probe were characterized by UV-Vis spectrophotometer, HR-TEM, SEM, EDX, revealing superior performance over...

Application of defected ground structure (DGS) to suppress cross-polarized (XP) radiation from a microstrip patch antenna has been reinvestigated using new DGS geometry for much improved characteristics. Arc-shaped defect used in pair, symmetrically located under circular patch. A number optimization parameters have examined simulated results, leading design indicating XP behavior. set identical prototypes, with and without DGS, experimentally studied. The presence the shows as 30 dB...

Higher-order HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12δ</sub> mode has been experimentally realized in a cylindrical dielectric resonator antenna (CDRA) very recently revealing broadside radiation like the dominant xmlns:xlink="http://www.w3.org/1999/xlink">11δ</sub> mode. The primary challenge is excitation of practical DRA sitting on metal ground plane, which was first resolved by introducing floating feed as an equivalent current...

Defected ground structure (DGS) integrated microstrip array has been explored and demonstrated here for the first time with primary aim of achieving improved polarization purity. A shaped DGS variable configuration conceived designed rectangular arrays. This unleashes new potential design by reducing etched out area 50%. 2 × experimentally in X-band showing 12 dB improvement isolation between copol cross-pol radiations.

A new method of suppressing cross-polarized (XP) radiation using resonant-type defected ground structure (R-DGS) on microstrip antenna has been proposed in this communication. linearly shaped full wavelength R-DGS and experimentally verified for different geometries. The design is supported by thorough investigations the physical interaction between XP generating fields. Unlike previously explored nonresonant-type defects, approach independent patch geometry. consistent suppression H-plane...

A resonance cavity antenna (RCA) has been explored employing nontransparent solid metal sheet as superstrate which, to the best of our knowledge, is reported for first time. The proposed configuration much advantageous in terms design, simplicity, structural stability, fabrication, and cost without compromising gain, efficiency, bandwidth. probe-fed dielectric resonator (DRA) with ε <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</sub> = 10...

A new and physically realizable feed employing a dielectric resonator (DR) has been conceived demonstrated for HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12δ</sub> mode in cylindrical antenna (CDRA). This indeed enables realizing an improved version of dual-band dual-mode (DRA) with attractive broadside radiation along wide bandwidth characteristics. It comprises two-element stacked geometry, where the lower element is excited by...

In this communication, cross-polarized (XP) radiation of cylindrical dielectric resonator antenna (CDRA) has been investigated with a view to identify the source same. The study starts conjecture, which established through systematic using simulated results. inference verified experimentally help set prototypes. HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21δ</sub> identified as XP generating mode and small metallic grounded post...

Design aspects of an active spherical phased-array antenna (SPAA) operating in dual circularly polarized (CP) mode are discussed here. Dual CP configuration with good cross-polarized isolation enables frequency reuse using polarization diversity. This design also implements sharing the resources like amplifiers and phase shifters optimal way to reduce mass, power requirement, cost antenna. The is hemispherical shape maintains required effective isotropic radiated (EIRP) over a coverage area....

Spherical phased array antennas (SPAAs) are of particular interest for transmission payload data low earth orbiting (LEO) satellites to the ground stations. They can be designed scan large part radiation sphere with constant directivity. This helps in designing highly agile spacecrafts. In this paper, practical design aspects spherical arrays achieving an optimum configuration meet a specified goal discussed. The new concept sharing hardware among radiating elements and effects failure few...

Inflammatory plaques are a hallmark of discoid lupus erythematosus (DLE), chronic cutaneous illness that can cause skin shrinkage and disfiguring scarring if left untreated. The best treatments, however, not well supported by the available data. As right now, no drugs have been authorized expressly to treat DLE. This uncommon ailment manifests as crimson telangiectatic lesion in oral cavity, surrounded white patches mucous membrane. Occasionally, thick or thin papillary radiating patterns...

An insight based on a new theoretical approach has been developed to facilitate the design of superstrate which plays key role in realizing high gain resonance cavity antenna (RCA). The work is aimed address profound basis controlling aperture fields by proper shaping and apply it alleviate earlier shortcomings along with further improvement radiation characteristics. This demonstrates an interesting transformation metal from rectangle ellipse or ellipse-circle combination achieve...

A symmetric as well nonproximal defected ground structure has been conceived for a square microstrip patch to achieve high co- cross-polarized (XP) isolation over the principal radiation planes. This design does not follow thumb rule of earlier works where defect was deployed either underneath or in close proximity boundary. The proposed configuration, therefore, appears be ideal some specific applications, such dual-polarized circularly polarized patches with improved polarization purity....

Modification and improvement in the radiation characteristics of a resonance cavity antenna (RCA) have been addressed from new approach aperture field synthesis over superstrate. This concept has established through series systematic studies, which are based on exciting observations reported very recently by these authors. A process modification or engineering superstrate conjectured view obtaining reduced sidelobe level (SLL) and/or increased gain. The same successfully designed...