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166 articles for “resonant frequency”
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Quad-Band Notched Small Monopole Antenna with U-shaped Slots and SRRs for UWB Applications
Abstract: A quad-band notched small monopole antenna with U-shaped slots and SRRs for UWB applications is presented in this study. The quadruple band-notched characteristics can be achieved by embedding three U-shaped slots on the radiation patch and two split ring resonators (SRRs) near feed line, respectively. It has a tiny size, only 17 mm23 mm0.508 mm. The experimental and measured results demonstrate that the proposed antenna offers an impedance bandwidth across …
Published in Journal of Communication Engineering & Systems · Vol. 15, Issue 1, 2025 · pp. 21–31 Read article
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Millimeter Wave Slotted Microstrip Patch Antenna for Next Generation 5G Communication
Abstract: Abstract: In this paper, a printed microstrip patch antenna is analyzed for lower band 5G technology. The proposed printed Microstrip patch antenna has a compressed structure having dimension 20 × 20 × 1.6 mm3 with the conducting ground plane and this antenna is well suited for the use in handheld next generation 5G devices. Modified antenna resonated at lower band of 5G communication technology. In this research work geometry of …
Published in Journal of Microwave Engineering and Technologies · Vol. 6, Issue 1, 2019 · pp. 25–30 Read article
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Modelling and finite element analysis of thermo acoustic refrigerator
Abstract: In this work, the standard modified thermo-acoustic refrigerator (TAR) is created. It has a stack, heat exchanger, thermocouple, resonator tube, and an acoustic driver (loudspeaker). The effects of a few design factors were investigated for a thermo-acoustic refrigerator system, including wave patterns, frequency, and heat exchanger. It was discovered that a sine wave pattern produced better cooling results than the other wave patterns examined. The heat exchanger's addition greatly increases …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 9, Issue 3, 2022 · pp. 31–46 Read article
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Evidence for Forward Spin and Reverse Spin Radio Photons
Abstract: We generated alternate spin radio frequency photons by accelerating metallic valence electrons in a wire with half portions of a sine wave. To avoid standing waves from sinusoidal movement, a non-resonating transmitter was built with a non-resonating antenna. An oscilloscope at a second non-resonant receiving antenna 3 wavelengths away from the transmitter detected positive going 180-degree voltage pulses. Reversing the direction of electron excitation in the transmitter antenna caused negative …
Published in International Journal of Radio Frequency Innovations · Vol. 1, Issue 1, 2023 · pp. 1–12 Read article
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Wideband Bandstop Filter Using Triangular SRR-DGS
Abstract: This article presents a dumbbell shaped triangular split ring resonator (SRR) in the design of wideband bandstop filter. Initially, a conventional dumbbell shaped triangular defective ground structure (DGS) is used to realize the single bandstop filters at the frequency of 3.55 GHz. This triangular shaped DGS structure is modified to a new structure to realize a wideband bandstop filter characteristics with the frequency range of 3.3 to 4.5 GHz which …
Published in Journal of Electronic Design Technology · Vol. 8, Issue 1, 2017 · pp. 11–16 Read article
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Mechanism of Intensive Gas and Fluid Mixture in the Process of Vibroturbulization and Its Technological Applications
Abstract: Previously conducted experimental studies have established that in a certain narrow frequency range and upon reaching a certain value of the amplitude of water oscillations in a sealed vessel with above-water air shell, subjected to vertical vibration, a resonant phenomenon occurs, called “vibroturbulization”, leading to intensive mixing of media of different density. The studies carried out were purely experimental in nature and could not reveal the physicochemical mechanism of occurrence, …
Published in Recent Trends in Fluid Mechanics · Vol. 9, Issue 2, 2022 · pp. 21–34 Read article
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Dielectric Responses of Hybrid Polymer Matrix Composites at 2–3 GHz Microwave Frequencies
Abstract: AbstractMeasurement of dielectric properties of polymeric materials in the 2–3 GHz frequency region is very important for strategic applications such as communication electronics, rapid prototyping, and radiation assisted heating. As per international standards for industrial, scientific and medical applications (ISM) 0.9, 2.45 and 5.8 GHz microwaves can be used both for heating and communication purposes, of this 2.45 GHz is most widely used frequency, hence it is important to characterize …
Published in Journal of Polymer & Composites · Vol. 3, Issue 1, 2015 · pp. 1–11 Read article
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Analysis of LC Oscillation Presence and Its Impacts in 765 kv Line Connected With Non-Switchable Shunt Reactor
Abstract: AbstractThe transmission lines are one of the most important parts of the power system. The number of line faults in transmission line is more compared with the total number of faults in the whole power system. Distance protection is commonly used in long transmission lines. It works on the basis of increase or decreases in predetermined value of circuit admittance, impedance, or reactance. Shunt reactors are connected in high voltage …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 1, 2016 · pp. 20–24 Read article
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Experimental Analysis of Rectangular and Circular Microstrip Patch Antenna with Superstrates
Abstract: This paper focusing on the experimental analysis of rectangular and circular microstrip patchantennas with and without radome (superstrate). The proposed antennas were designed at2.4GHz, using HFSS simulation software and fabricated on Arlon DiClad 880 substratewhose dielectric constant is 2.2, loss tangent is 0.0009 and thickness of the substrate is1.6mm. Placing different dielectric constant of the superstrates above the patch antennasperformance characteristics have been studied of both antennas on the basis …
Published in Recent Trends in Electronics Communication Systems · Vol. 7, Issue 3, 2020 · pp. 34–45 Read article
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A Comparative Analysis of Graphene Based Terahertz Reconfigurable Antennas: A Review
Abstract: In this paper, an overview of various reconfigurable antenna designs based on graphene material utilized for terahertz applications is presented. Terahertz electromagnetic spectrum is the term used to describe the frequency range between 0.1 and 10 THz. A promising material for THz reconfigurable antennas, graphene has a low skin effect and a built-in ability to tune by chemical or electrostatic gating. This study reviews the development of reconfigurable antenna for …
Published in Journal of Polymer & Composites · Vol. 11, Issue 5, 2023 · pp. 44–55 Read article
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HVDC Low Loss Switching Boost Converter Using Auxilary Circuit
Abstract: AC supply is available in different frequencies so many problems occur in different etiquettes; like battery charging needs the nonstop DC supply. Because of switching losses(AC to DC converters) are befalls in the converters. A new soft switching boost converter with an auxiliary or secondary switch and resonant circuit is projected in this work. The resonant circuit is consisted of a resonant inductor Lr, two resonant capacitors Cr1 Cr2, two …
Published in Journal of Electronic Design Technology · Vol. 6, Issue 3, 2015 · pp. 33–39 Read article
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U-Shaped Antenna Design for 5G High Frequency Band
Abstract: Designing small antennas for 5G millimeter wave bands is an emerging research subject in the wireless communication age. This research paper describes the design, simulation, and measurement of a micro-strip patch antenna operating at high frequency, 38 GHz. The substrate material used is FR4 proxy due to its easy availability and cost with the dielectric constant 3.8 to 4.6. The analysis and simulation are done on Ansys HFSS Software. The …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 3, 2023 · pp. 31–40 Read article
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Noise, Vibration and harshness control in motor vehicular parts; a mechanical approach
Abstract: Over the years, noise, vibration and hardness in vehicles has been a major challenge in the field of automobile engineering. With the introduction of new vehicle models, vehicle parts design has been so complex and sometimes we wonder why this happens. NVH which is the internal noise we experience inside the vehicle is generated by several sources inside the vehicle of which includes the engine, the propeller shaft, the differential …
Published in Journal of Automobile Engineering and Applications · Vol. 8, Issue 2, 2021 · pp. 49–53 Read article
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A Quad-Element UWB-MIMO Triangular Monopole Antenna with Triple Band -Notch and High Isolation
Abstract: A quad-element UWB-MIMO triangular monopole antenna with triple notched bands and high isolation is proposed in this paper. The presented antenna consists of four triangular -shaped antenna elements, which are arranged in orthogonal orientation. This antenna is printed on low-cost FR-4 substrate with dielectric constant of 4.4 and its overall size is 50 × 50 × 1.6 mm3. Its operating frequency band is 2.97~11GHz. High isolation of 22dB between four …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 30–37 Read article
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Design and Implementation of UWB-MIMO Triangular Antenna with Notch Technology
Abstract: The paper proposes a quad-element UWB-MIMO triangular monopole antenna with triple notched bands and high isolation. The antenna comprises four triangular-shaped elements arranged orthogonally, printed on a low-cost FR-4 substrate with a dielectric constant of 4.4. Its dimensions are 50 × 50 × 1.6 mm³, and it operates within the frequency band of 2.97 to 11 GHz. To achieve high isolation of 22 dB between the four radiatingelements, a square …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 3, 2023 · pp. 8–15 Read article
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EBG Technology and Applications; A Review
Abstract: This present paper concentrates on applications of Electromagnetic band gap (EBG) technology that is operating at microwave and sub mm wave frequencies. Some of examples of Electromagnetic band gap configurations in the region of microwave are shown, that includes array antennas, high precision GPS, mobile telephony, wearable antennas and diplexing antennas. A 500 GHz dipole configuration and a novel heterodyne mixer are shown as examples for sub millimeter wave region. …
Published in Journal of Microwave Engineering and Technologies · Vol. 2, Issue 1, 2015 · pp. 21–36 Read article
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A Hybrid voice identification System with Fuzzy Technique and ART2 Neural Network on BPF Technique
Abstract: Abstract:In this work, we evaluate the performance of voice identification through the hybrid method using fuzzy and Adaptive Resonance Theory2. The Voice identification is an important task, which shows the active interaction of natural human-machine, for over last important two decades. The objective of this work, it is consists in working out an identification rate of voice identification. The proposed methodology presented allows evaluating the identification process which considers a …
Published in Journal of Communication Engineering & Systems · Vol. 8, Issue 3, 2018 · pp. 1–6 Read article
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Two Port Ring Shaped DRA Based MIMO (Multiple Input Multiple Output) Antenna for WLAN Application
Abstract: This paper presents multiple input and multiple output (MIMO) antenna which is based on dielectric resonator with very good isolation. This antenna consists of two hybrid resonator and is fed by microstrip feedline through H-Shaped aperture is cut in ground plane just below the Ring DR. Area of this antenna is 40x50 mm². Impedance bandwidth (S11<-10dB) of this antenna is 5.15 to 6.15 GHz. The radiation efficiency and total gain …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 7, Issue 1, 2019 · pp. 17–24 Read article
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New trends in Radio Frequency design and making things smaller
Abstract: Recent improvements in wireless communication, the Internet of Things (IoT), and 5G/6G networks have made people want small, powerful radio frequency (RF) equipment. With an emphasis on how developments in materials engineering, circuit architecture, and packaging technologies are redefining RF system integration, this article offers a thorough evaluation of current developments in RF downsizing. System-on-Chip (SoC), System-in-Package (SiP), and Antenna-in-Package (AiP) ideas, which allow tightly integrated RF front-ends with enhanced …
Published in International Journal of Radio Frequency Innovations · Vol. 3, Issue 2, 2025 · pp. 28–34 Read article
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A Compact CPW-fed Quadruple-band-notched Antenna with Concentric Annular-rings for UWB Applications
Abstract: In this paper, a compact coplanar waveguide (CPW)-fed quadruple-band-notched antenna with concentric annular-rings for ultra-wideband (UWB) applications is presented. The proposed antenna consists of four concentric annular-ring resonators, a circular shape radiating element and a CPW feed line. The quadruple band rejection is easily achieved by controlling the widths and radii of four concentric annular-ring resonators. Through the exception of four stop-bands at 3.29 to 3.7 GHz, 5.07 to 5.92 …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 38–47 Read article