Novel compact design high gain DC–DC step up converter applicable for PV applications

2022 ◽  
Vol 51 ◽  
pp. 101720
Author(s):  
S.K. Purushothaman ◽  
D. Sattianadan ◽  
K. Vijayakumar
Keyword(s):  
High Gain ◽  
Compact Design

An Improved Compact Antenna Design proposed for 5G Cellular Band

2019 ◽  
Vol 09 ◽  
Author(s):  
Rajiv Pathak ◽  
Guru Prasad Mishra ◽  
Biswa Binayak Mangaraj ◽  
Ashutosh Narayan
Keyword(s):  
High Gain ◽  
Substrate Material ◽  
Base Station ◽  
Center Frequency ◽  
Patch Antennas ◽  
Patch Area ◽  
Compact Antenna ◽  
High Data ◽  
Area Reduction ◽  
Compact Design

Several rectangular Microstrip Patch Antennas (MPAs) with different substrates are designed to achieve high gain and high data rate for the 5G cellular band. One of these which uses a Polymethacrylate / Rohacell 51 as substrate material provides a high gain of 10.054 dB and a moderate bandwidth of 80 MHz (2.28 % of f0). This MPA can be preferred for 5G cellular base station antenna in 3.3 GHz - 3.7 GHz with center frequency (f0) 3.5 GHz. Considering this high gain rectangular MPA, several compact MPAs are designed with the help of simple pin shorting and chip impedance shorting techniques. Simple pin shorting compact design provides a patch area reduction of 97.09 %, a gain of 3.77 dB, and a bandwidth of 60 MHz. Chip impedance shorting is preferred to overcome the effect of narrowband in simple shorting and rectangular MPA. One of these which provides an improved bandwidth of 170 MHz (4.86 % of f0) and significant gain of 1.51 dB with 93.575 % patch area reduction can be preferred for mobile devices for 5G cellular in 3.3 GHz - 3.7 GHz.

The Puck Antenna: A Compact Design With Wideband, High-Gain Operation

2015 ◽  
Vol 63 (4) ◽  
pp. 1868-1873 ◽  
Author(s):  
Muhannad A. Al-Tarifi ◽  
Dimitris E. Anagnostou ◽  
Anthony K. Amert ◽  
Keith W. Whites
Keyword(s):  
High Gain ◽  
Compact Design

scholarly journals Compact design of two-elements cubic Yagi-Uda array antenna with high gain

2019 ◽  
Vol 8 (12) ◽  
pp. 652-656
Author(s):  
Shimpei Nagae ◽  
Satoshi Suzuki ◽  
Keisuke Konno ◽  
Hiroyasu Sato ◽  
Qiang Chen
Keyword(s):  
High Gain ◽  
Array Antenna ◽  
Compact Design

scholarly journals Gain Enhancement of Double-Slot Vivaldi Antenna using Corrugated Edges and Semicircle Director for Microwave Imaging Application

2021 ◽  
Vol 21 (2) ◽  
pp. 85
Author(s):  
Findi Nur Witriani ◽  
Yahya Syukri Amrullah ◽  
Fajri Darwis ◽  
Taufiqqurrachman Taufiqqurrachman ◽  
Yusuf Nur Wijayanto ◽  
...  
Keyword(s):  
Medical Profession ◽  
High Gain ◽  
Microwave Imaging ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Gain Enhancement ◽  
Imaging Application ◽  
Vivaldi Antenna ◽  
Compact Design ◽  
Slot Structure

Microwave imaging, such as images for radiological inspection in the medical profession, is one of the applications utilized in ultra-wideband (UWB) frequency ranges. The Vivaldi antenna is one of the most popular antennas for this purpose. The antenna is utilized because of its simple, lightweight, and compact design, as well as its excellent efficiency and gain capabilities. In this work, we present a high-gain Vivaldi antenna for microwave imaging applications. The proposed Vivaldi antenna is designed using a double-slot structure method with the addition of corrugated edges and a semicircle director aimed at improving the gain. The antenna is designed to operate at frequencies ranging from 3.1 to 10.6 GHz. Based on the modeling findings, the suggested antenna attain a bandwidth of 7.5 GHz with operating frequencies from 3.1 GHz to 10.6 GHz for a VSWR of less than two. In comparison to a typical single slot antenna, the suggested antenna provides a substantial boost in gain performance. The increase in gain is proportional to the frequency of operation. The constructed antenna has a lower bandwidth than the simulated one, with operating frequencies of 3.5 GHz – 3.75 GHz and 4.25 – 10.89 GHz, respectively, and useable bandwidths of 250 MHz and 6.64 GHz. All these results suggest that the antenna is suitable for microwave imaging applications.

scholarly journals A High-Gain CNTFET-Based LNA Developed Using a Compact Design-Oriented Device Model

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2835
Author(s):  
Paolo Crippa ◽  
Giorgio Biagetti ◽  
Claudio Turchetti ◽  
Laura Falaschetti ◽  
Davide Mencarelli ◽  
...  
Keyword(s):  
Power Dissipation ◽  
Field Effect Transistors ◽  
Electronic Devices ◽  
High Gain ◽  
Superior Performance ◽  
Device Model ◽  
Higher Power ◽  
Rf Devices ◽  
Compact Design

Recently, carbon nanotube field-effect transistors (CNTFETs) have attracted wide attention as promising candidates for components in the next generation of electronic devices. In particular CNTFET-based RF devices and circuits show superior performance to those built with silicon FETs since they are able to obtain higher power-gain and cut-off frequency at lower power dissipation. The aim of this paper is to present a compact, design-oriented model of CNTFETs that is able to ease the development of a complete amplifier. As a case study, the detailed design of a high-gain CNTFET-based broadband inductorless LNA is presented.

Effect of energy filtering on micro-diffraction in the SEM

1994 ◽  
Vol 52 ◽  
pp. 604-605
Author(s):  
James F. Mancuso ◽  
Leo A. Fama ◽  
William B. Maxwell ◽  
Jerry L. Lehman ◽  
Hasso Weiland ◽  
...  
Keyword(s):  
Detection Efficiency ◽  
Ccd Camera ◽  
High Gain ◽  
Microchannel Plate ◽  
Electrostatic Energy ◽  
Energy Filtering ◽  
Electron Channelling ◽  
Low Energy Electrons ◽  
Low Sensitivity ◽  
Angular Field Of View

Micro-diffraction based crystallography is essential to the design and development of many classes of ‘crafted materials’. Although the scanning electron microscope can provide crystallographic information with high spatial resolution, its current utility is severely limited by the low sensitivity of existing diffraction techniques (ref: Dingley). Previously, Joy showed that energy filtering increased contrast and pattern visibility in electron channelling. This present paper discribes the effect of energy filtering on EBSP sensitivity and backscattered SEM imaging.The EBSP detector consisted of an electron energy filter, a microchannel plate detector, a phosphor screen, optical coupler, and a slow scan CCD camera. The electrostatic energy filter used in this experiment was constructed as a cone with 5 coaxial electrodes. The angular field-of-view of the filter was approximately 38°. The microchannel plate, which was the initial sensing component, had high gain and had 50% to 80% detection efficiency for the low energy electrons that passed through the retarding field filter.

Equivalent Noise Dose Obtained Through Hearing Aids in the Classrooms of Hearing-Impaired Children

1990 ◽  
Vol 21 (3) ◽  
pp. 147-150
Author(s):  
Ronald A. Wilde
Keyword(s):  
Hearing Aids ◽  
High Gain ◽  
Hearing Impaired ◽  
Deaf Children ◽  
Impaired Children ◽  
Very High ◽  
Hearing Impaired Children

A commercial noise dose meter was used to estimate the equivalent noise dose received through high-gain hearing aids worn in a school for deaf children. There were no significant differences among nominal SSPL settings and all SSPL settings produced very high equivalent noise doses, although these are within the parameters of previous projections.

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