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443 articles for “K-band”
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Microstrip Textile Antenna for S-band Applications
Abstract: In this article, the proposed textile antenna has been studied with better results, high directivity, high gain, good return loss and multiple bands are obtained for wide range of applications in S-band with multiple bands. The substrate material of the proposed antenna is a jean which is a flexible material, the patch and partial ground plane is of copper. There is a modification in proposed textile antenna design with the …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 4, Issue 2, 2017 · pp. 27–31 Read article
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Impact of Semiconductor Material Properties on Device Behavior and Circuit Performance: A Comprehensive Review
Abstract: Semiconductor materials play a fundamental role in determining the performance, efficiency, and reliability of modern electronic devices and circuits. This review presents a comprehensive analysis of how intrinsic and engineered material properties influence device behavior and overall circuit functionality. Key parameters such as bandgap energy, carrier mobility, thermal conductivity, and defect density are examined to understand their direct impact on switching speed, power consumption, and operational stability. The paper explores …
Published in Journal of Semiconductor Devices and Circuits · Vol. 13, Issue 1, 2026 · pp. 19–26 Read article
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A quad band PIFA for 4G / 5G wireless communication applications
Abstract: AbstractA compact PIFA for wireless RF (Radio Frequency) devices is presented. The proposed antenna covers GPS L1, GSM 1800, GSM 1900, UMTS 2100, LTE 1700/2100 MHz, LTE 2300, Bluetooth/Wi-Fi/IEEE 802.11 b/g/n, RFID, IEEE 802.16e mobile WiMAX, UNII and C-band frequency bands useful for both 4G and 5G wireless communication applications. The simulation results for return loss, VSWR, two-dimensional radiation patterns and current distribution are demonstrated. The parametric analysis of feed …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 2, 2019 · pp. 7–15 Read article
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Exploration as Construction: An Analysis of the Role and Impact of African Political Thought on Some Colonized African States and Societies
Abstract: This study examines some major developments discovered under the subject matter titled: “Exploration as Construction: An Analysis of the Role and Impact of African Political Thought on Some Colonized African States and Societies”. The study drew upon a combination of published and unpublished sources during its research process. The study argues that the positive role and impact of African Political Thought, on Colonized Africa could not be ignored. The constructive …
Published in OmniScience: A Multi-disciplinary Journal · Vol. 15, Issue 1, 2025 · pp. 1–10 Read article
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Appendiceal Tie Syndrome
Abstract: Introduction: Appendicular tie/knot syndrome is a very rare presentation of acute appendicitis causing intestinal obstruction. The literature has described intestinal knot syndromes such as ileosigmoid knots and ileal-ileal knots. We present a case of an appendico-ileal knot, an uncommon type of closed-loop blockage, caused by a lengthy, inflamed appendix wrapping around a loop of the ileum. Aim: to increase clinical awareness of this issue among medical professionals so that it …
Published in Research and Reviews : Journal of Surgery · Vol. 11, Issue 3, 2022 · pp. 22–27 Read article
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CMOS Gm-C IF Filter using SCA for Dual Band Receiver
Abstract: This paper deals with design of folded cascode OTA-C filter, which works for frequencies for RF application, based on transistor sizing methodology and simulation results are performed using SPICE software and BSIM3V3 model for CMOS 0.18 μm process, show that the designed folded cascode OTA has a 52 dB DC gain and provides a unit gain bandwidth of around 400 MHz. Design of CMOS Gm-C 2nd order Biquad filter implementation …
Published in Journal of VLSI Design Tools and Technology · Vol. 5, Issue 3, 2015 · pp. 18–36 Read article
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A Circular Slot Loaded H-Shaped Printed Microstrip Patch Antenna for Lower Band 5G Applications
Abstract: Abstract: A circular slot loaded H-Shape patch antenna is introduced in this paper. A circular slot loaded H-Shape patch antenna is fed with coplanar wave guide (CPW) is discussed which is applicable for lower band 5G applications. The radiation pattern is omni-directional which is very near to H-plane. The area of ground plane is 80×101×1.5 mm3 with substrate material having dielectric constant 2.2 and loss tangent 0.002 is used. The …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 6, Issue 1, 2019 · pp. 9–14 Read article
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A Novel High Gain Cavity Backed Micro Strip-Fed Circular Triangular Corner Fractal Antenna for UWB Applications
Abstract: In the current article, a novel micro strip-fed circular triangular corner fractal unidirectional antenna with high gain is proposed for ultra wideband (UWB) applications. This antenna consists of circular patch with triangular slot with three iterations. A prototype of antenna has been designed on FR4 substrate having dielectric constant 4.4 and thickness 1.6 mm. This reference antenna is then placed in a cavity made up of FR4 having thickness same …
Published in Journal of Electronic Design Technology · Vol. 6, Issue 1, 2015 · pp. 19–24 Read article
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DFT/Data Guided Predictive Modelling of Absorption Maxima in the OLED Rubrene Derivatives
Abstract: This study investigates the optical properties of rubrene derivatives to develop an accurate predictive model for absorption maxima using computational chemistry and chemoinformatic techniques. We benchmarked various quantum chemical methods, identifying that the M06-2X/aug-cc-pVDZ method in dichloromethane (DCM) provided the strongest correlation with experimental data. Key molecular descriptors such as band gap, ionization potential, and electrophilicity index were calculated and analyzed using principal component analysis (PCA) to identify significant factors …
Published in International Journal of Cheminformatics · Vol. 4, Issue 1, 2026 · pp. 41–56 Read article
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Techniques of Atomic Structure Orbit Potential of The Frequency Characteristics of Silicon Element
Abstract: This study explores the technological applications and material integration of semiconductor materials, with a focus on their electronic properties and practical implementations. The investigation primarily addresses four key objectives: analyzing the electronic band structure and density of states (DOS) of semiconductor materials, evaluating the band alignment in heterojunctions, and integrating these materials into practical technological applications. Using a simplified tight-binding model, we compute and plot the electronic band structure of …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 11, Issue 3, 2024 · pp. 16–32 Read article
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Effects of Variation of Injection Current on Characteristics of a 1550 nm Semiconductor Laser
Abstract: AbstractThis work represents the prototype of both the analytical and the simulation based study on high speed communication system particularly high speed data transmission through optical fiber using 1550 nm InGaAsP/InP laser. In recent years, Vertical Cavity Surface Emitting Lasers (VCSELs) are prerequisites for future ultrahigh data-rate systems. This paper represents an overview on high speed performance of the 1550 nm VCSEL. Using MATLAB simulation tool the characteristics of the …
Published in Trends in Opto-electro & Optical Communication · Vol. 3, Issue 2, 2013 · pp. 1–6 Read article
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Solar Energy Conversion System with Maximum Power Point Tracking
Abstract: AbstractThis paper presents an algorithm that help to track the maximum power point of the solar PV module automatically. Perturb and observe algorithm is most popular algorithm. In this algorithm a slight perturbation is introduced. Due to this perturbation, the power of the module changes. If the power increases due to perturbation then the perturbation is continued in that direction. After the peak power is reached the power at the …
Published in Journal of Instrumentation Technology & Innovations · Vol. 8, Issue 3, 2018 · pp. 15–20 Read article
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Analysis of N-Slot Loaded Patch Antenna for Tripple Band Operation
Abstract: ABSTRACT In this paper, the analysis of N-slot loaded microstrip antenna having single and double dielectric layer with coaxial feeding is presented using circuit model analysis. The antenna gives triple resonance and the separation between these resonances depends on the dimension of the slot. This antenna gives wide bandwidth for all three resonant frequencies for single dielectric and gives four bandwidths for double dielectric layer. It is observed that the …
Published in Journal of Communication Engineering & Systems · Vol. 2, Issue 3, 2012 · pp. 11–19 Read article
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Dispersion Analysis of TE Modes in 1D Magnetized Ferrite Photonic Crystals for Tunable and Switchable Band Gap Filtering Device Applications under Transverse Magnetization Configuration
Abstract: The article comprehensively explores the dispersion characteristics exhibited by TE modes within one-dimensional magnetized ferrite photonic crystals, particularly under the influence of transverse magnetization. We employed the rigorous transfer matrix method, a powerful tool for theoretical investigation, calculation, and behavior analysis of such intricate systems. Our research delves into the structural parameters that govern the behavior of these ferrite photonic crystals, explicitly focusing on the incident parallel wave vector (β) …
Published in Journal of Polymer & Composites · Vol. 11, Issue 7, 2023 · pp. 60–68 Read article
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Siri Bhuvalaya – An Ancient Universal Archive of Knowledge in Jain Tradition
Abstract: Siri Bhuvalaya, attributed to the Jain monk Kumudendu around the 11th century C.E., represents a unique multidimensional literary work that outshines conventional textual forms. Encoded through complex numerical matrices known as chakras and combinatorial rules called bandhas, it preserves a vast interdisciplinary compilation encompassing philosophy, mathematics, astronomy, chemistry, medicine, and linguistics. The text embodies Jain doctrines of pluralism and conditional truth by enabling multiple valid readings across over 700 languages. …
Published in International Journal of Trends in Humanities · Vol. 3, Issue 2, 2026 · pp. 10–14 Read article
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A Review on Quad Band Microstrip Antenna for GSM and GNSS Application
Abstract: Micropstrip or patch antennas are also known as a printed antenna fabricated on printed circuit board (PCB). Microstrip antennas are low cost, have a low profile, low weight and are easily fabricated [1]. They are used atmicrowave frequencies. In this review paper, a survey on quad band operations in patch antenna papers, which have been used by authors for designing of low profile, small compatible patch antenna, have been presented. …
Published in Journal of Microwave Engineering and Technologies · Vol. 4, Issue 1, 2017 · pp. 1–5 Read article
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Ionospheric Disturbances and Communication Signal anomalies due to eruption of Solar flare Activity
Abstract: Solar flares tend to disrupt the radio communication systems and modulate active radio wave frequencies, particularly the ones that have utility in High Frequency (HF) radio signals and transceiver signals because they are the ones who find utility in radio communications systems. Solar flares generate electromagnetic waves which interact with the earth’s atmospheric medium and travel through the ionospheric region. These electromagnetic waves modulate radio frequency communication signals. This modulation …
Published in Current Trends in Signal Processing · Vol. 15, Issue 1, 2025 · pp. 7–14 Read article
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INVESTIGATION OF MICROSTRIP BANDPASS FILTER FOR S-BAND APPLICATION
Abstract: Abstract— Microstrip bandpass filter is presented in this paper for S-band application. The filter employs the microstrip line with port matching topology and plane ground to operate in S-band frequency range. CST Microwave Studio simulator is used for simulation and Rohde & Schwarz Vector Network Analyzer is used for measurement. Filter has size of 120 mm x20 mm and fabricated using low cost FR-4 substrate of 1.6 mm thickness and …
Published in Current Trends in Signal Processing · Vol. 8, Issue 1, 2018 · pp. 28–32 Read article
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A High Performance Reference Circuit with Optimized Input Offset Operational Amplifier using Device Mismatch Model
Abstract: In this paper, author describes a band gap reference (BGR) circuit, having reference voltage 1.20V with maximum temperature coefficient of 63 ppm/0C in temperature range of –40 to 120 0C. The circuit operates in range of supply voltage, 3.0V to 3.6V. An operational amplifier (op-amp), whose input offset voltage is reduced upto 892 µV using Pelgrom’s device mismatch model is used in BGR. The power supply rejection ratio of circuit …
Published in Journal of VLSI Design Tools and Technology · Vol. 3, Issue 1, 2013 · pp. 1–7 Read article
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Compact Printed Coplanar Waveguide-fed UWB/Bluetooth Integrated Antenna for Wireless Personal Area Network Communication
Abstract: AbstractA compact integrated Bluetooth and ultra-wideband (UWB) coplanar waveguide (CPW)-fed antenna is presented and discussed. In this paper, the designed antenna has got specialty having wide coverage of Bluetooth and UWB frequency band both successfully giving optimum performance and above all small size. It has been designed very compact retaining all the standard parameters like VSWR, radiation pattern and gain to the acceptable level. The integrated dual-band antenna covering 2.4–2.484 …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 2, 2013 · pp. 9–14 Read article