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915 articles for “bands”
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Design and Analysis of Rectangular Microstrip Antenna (RMSA) for Millimeter Wave Applications
Abstract: Millimeter-wave (MMW) communication is a key technology for next-generation wireless applications. However, the antenna design for such applications at the MMW band is a critical challenge. In this paper, the design and performance analysis of a Compact Rectangular Microstrip Antenna for Millimeter Wave Communication applications has been presented. The design has been carried out at 33.5 GHz and the antenna design parameters have been optimized to achieve the optimum characteristics. …
Published in Journal of Microwave Engineering and Technologies · Vol. 6, Issue 2, 2019 · pp. 6–13 Read article
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Circular Antenna with Square Slot at 2.1 GHz for RF Energy Harvesting Applications
Abstract: In this paper, a single band circular antenna loaded with square slots having an application in RF energy harvesting is introduced. Proposed antenna containing of a circular antenna along with square slot loaded inside in the patch. For an antenna design, Computer Simulation Technique (CST) solver simulator was used. The antenna is being fabricated and its characteristics were measured. The band is covering most of the wireless applications. The simulated …
Published in Journal of Microwave Engineering and Technologies · Vol. 6, Issue 2, 2019 · pp. 22–24 Read article
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Design of a Multiband Antenna with Rectangular and Circular Slots for 5G Mobile Technology
Abstract: AbstractThis paper presents a microstrip patch antenna for 5G mobile communication. Requests for mobile communication arise because of rapid growth in mobile users. So, users need more features like high data rate, good communication and reduced traffic on their mobile phones. These requirements can be met using 5G technology. 5G technology offers very high bandwidth, reduced latency, broadband spectrum, improved QoS and a better capacity. 5G operates from 24 GHz …
Published in Journal of Microwave Engineering and Technologies · Vol. 7, Issue 2, 2020 · pp. 30–34 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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Design Of Multi-Bit Chipless RFID Tag Using Hybrid Resonator For Retail And Healthcare Applications
Abstract: Resonators play a very important role in chipless radio frequency identification (RFID) systems. To overcome the challenges like cost, compact dimension, and high coding capacity, chipless transponders are highly facilitated for the advancement in chipless RFID technology. This research aims to investigate innovative design options for passive RFID transponders operating in a wide range of frequencies in order to address the aforementioned issues and contribute to RFID technology advancement. To …
Published in Journal of Microwave Engineering and Technologies · Vol. 8, Issue 2, 2021 · pp. 35–43 Read article
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Analysis of Braggs Grating for photonics application
Abstract: The plane wave expansion approach was used to optimise reflectance in a Braggs grating on a silicon on insulator structure at wavelength 1.55µm. When the results were compared to the experimental results, it was discovered that they agreed better than any other present results. Aside from the inherent benefits of FBGs, such as low cost, low losses, polarisation insensitivity, and full compatibility with fiber-optic systems, they have demonstrated that by …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 1, 2022 · pp. 32–35 Read article
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Cylindrical Dielectric Resonator Antenna With Rectangular Patch
Abstract: DRAs are used for 5G communications of huge bandwidth from millimeter to Terahertz. high facts charge is performed through the channel ability i.e. C=Blog2(1+SNR) where C is the channel capacity and B is the bandwidth of the channel. The cylindrical resonator antenna operating in hybrid HEM11 mode. in this paper a cylindrical dielectric resonator antenna (CDRA) with frequency range (26GHz).The cylindrical dielectric resonator with radius r=1.45mm and height h=1.4mm. the …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 1, 2022 · pp. 9–15 Read article
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Compact MIMO Antenna Array based on Koch Fractal Metamaterial for 5G Applications
Abstract: In this paper, a design of a printed MIMO antenna array for 5G applications is proposed based on low profile structure. Thus, the antenna element is designed as a printed mender monopole with a partial ground plane. The partial ground plane is proposed to realize bandwidth enhancements through etching rectangular slots in the antenna back panel. It is found that such antenna shows two frequency bands, S11<-10dB, from 3 GHz …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 3, 2022 · pp. 1–7 Read article
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Gallium Nitride based HEMTs in Nano-Scale Regime
Abstract: AbstractIn this work, a maximum drain current of 557 mA is achieved by the simulated structures of double-heterojunction HEMTs using the SILVACO-ATLAS software tool. The drain current is found to be higher at shorter gate length. The drain current is observed as higher at larger aluminium mole fraction. The drain current is also higher at larger thickness of AlGaN barrier layer. Again, the drain current is higher at larger doping …
Published in Journal of Microelectronics and Solid State Devices · Vol. 5, Issue 3, 2018 · pp. 11–21 Read article
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A Comparative Analysis of Various Flipped Voltage Follower Cells
Abstract: Flipped voltage follower (FVF) cell is used for designing low-voltage/low-power analog circuits. It can operate with a single supply voltage, less than the sum of the threshold voltages of a PMOS and NMOS transistor. The three different configurations of the FVF cell namely conventional FVF, FVF using level shifter (FVFLS) and FVF using bulk driven technique (FVFBD) are presented. Various parameters such as input/output swing, gain, bandwidth and power dissipation …
Published in Journal of Microelectronics and Solid State Devices · Vol. 4, Issue 2, 2017 · pp. 1–8 Read article
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Real-time Implementation of Binary Mask Algorithm for Hearing Prosthetics
Abstract: As the current speech enhancement algorithms can give results for improved speech audibility only. So, our main motivation is to develop speech enhancement algorithm that would improve performance in speech for hearing impaired persons. In this paper, an algorithm is presented for improving speech intelligibility. Various speech enhancement algorithms were developed but only some of them can be used for real time hearing aid applications. This proposed algorithm can be …
Published in Journal of Microelectronics and Solid State Devices · Vol. 3, Issue 1, 2016 · pp. 36–42 Read article
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Implementation of 16-Bit Qam Using Texas Instruments
Abstract: In this paper, an implementation of 16-bit QAM is performed where there is a high use of Digital Video Broadcasting Cable (DVB-C), as there is increase in the usage the bandwidth requirement for each user is mutually increasing. Due to this, there is spectral congestion caused and drastic improvements have been taken in the field of communications. QAM multilevel modulation can offer an attractive solution to current bandwidth restriction in …
Published in Journal of Microelectronics and Solid State Devices · Vol. 2, Issue 2, 2015 · pp. 14–20 Read article
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Three-stage Decimation Filter Design with CIC and FIR Filters: A Review
Abstract: In this paper the design of decimation filter with three stages are considered and presented using the FDA tool of MATLAB. The decimation filter reduces the sampling rate of the signal while preserving the required data. The single stage filter is very difficult to implement because it requires more coefficients which results in bad frequency response so three stages of filters are considered, and further decimation is done. In filter …
Published in Journal of Nuclear Engineering & Technology · Vol. 13, Issue 1, 2023 · pp. 30–36 Read article
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A Simplified Indirect Control Scheme for Shunt-active Power Filters
Abstract: This paper presents a simplified indirect control scheme for shunt-active power filters for compensating harmonic currents and improving power factor. The control is based on the simple method for generation of the reference compensating current. The reference compensating current is obtained by subtracting load current from reference source current. PI controller is used to adjust the amplitude of the reference source current that regulates the DC capacitor voltage. Hysteresis band …
Published in Journal of Power Electronics and Power Systems · Vol. 2, Issue 1, 2012 · pp. 1–7 Read article
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Design and Performance of Semiconductor-Biosensor
Abstract: In this work, a high electron mobility transistor (HEMT) based biosensor is designed to detect the virus-protein. In this work, all the simulation-studies are carried out in the SILVACO-ATLAS physical simulator using the following models: Shockley Read Hall (SRH), band gap narrowing, Auger recombination, and Fermi Dirac statistics. Newton trap numerical solver is used in the device simulation. Conduction band engineering of the biosensor is studied. DC and RF properties …
Published in Journal of Semiconductor Devices and Circuits · Vol. 8, Issue 2, 2021 · pp. 1–13 Read article
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DC and RF Analysis on Specific Quantum-Well Heterostructures
Abstract: Polarization-graded AlGaN back-barrier nano-layer is introduced in high electron mobility transistor (HEMT) structure to have an improved drain current characteristics and better radio-frequency performance, using two-dimensional drift-diffusion simulation by SILVACO-ATLAS physical simulator. In this work, the AlGaN/AlN/GaN/AlGaN/GaN double heterojunction HEMT structure is optimised with graded back barrier layer to study the DC and RF performances. Investigation of this structure with graded back barrier layer is the novelty of this work. …
Published in Journal of Semiconductor Devices and Circuits · Vol. 9, Issue 1, 2022 · pp. 1–13 Read article
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Wearable Antenna using Foam Substrate for Multiband Application
Abstract: The novel and flexible antenna for modern communication system is studied in this paper. The proposed antenna is compact in size, shows high directivity and large bandwidth. Polystyrene foam material is used as a substrate because such antenna is bendable, wearable, inexpensive, require less attention and having good features like low dielectric constant, low loss tangent and better efficiency. The parameters of antenna such as reflection coefficient, gain, bandwidth, radiation …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 4, Issue 2, 2017 · pp. 23–26 Read article
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Articulation Point Technique in MANET
Abstract: The mobile ad hoc network, which is a wireless network of special type and has a collection of wireless hosts with wireless network interfaces, encompasses a temporary network, without any established infrastructure or centralized administration. All wireless nodes will start broadcasting again all the received broadcast messages. It is a common problem called as blind broadcast. Every node may receive the same copy of the messages from all the neighboring …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 3, Issue 3, 2016 · pp. 25–34 Read article
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A Visible Light-based Indoor Navigation and Localization Solution for Visually Criticized Users
Abstract: Visible Light Communication is seen as a promising option for 5G communication because to its characteristics such as operating in a non-licensed frequency spectrum, offering high bandwidth, using minimal power, and being immune to electromagnetic interference. This property allows light waves to transmit data faster and convey more information, making VLC a promising solution for providing universal electronic navigation assistance to visually challenged individuals. VLC utilizes the visible light spectrum …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 10, Issue 2, 2023 · pp. 22–34 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