Four-way Gysel power divider/combiner with back-to-back configuration for dual-band operation

2017 ◽  
Vol 10 (2) ◽  
pp. 265-270
Author(s):  
Elham Moradi ◽  
Ali-Reza Moznebi ◽  
Kambiz Afrooz ◽  
Masoud Movahhedi
Keyword(s):  
Design Theory ◽  
Power Transmission ◽  
Short Circuit ◽  
Impedance Matching ◽  
Bottom Layer ◽  
Open Circuit ◽  
Power Divider ◽  
Dual Band ◽  
Line Theory ◽  
Form Design

In this paper, a four-way dual-band Gysel power divider (GPD)/combiner based on a back-to-back microstrip structure method is proposed and investigated. A two-layer substrate is adopted to implement this PD. In order to divide the input signal into four equivalent signals, the input and four output ports of the proposed PD are placed on the top and the four external isolation resistors are placed on the bottom layer of the substrate. Furthermore, the dual-band response is achieved by adding a short-circuit stub and an open-circuit stub to the structure. Then, the theoretical closed-form design formulas are derived based on the considered conditions and circuit transmission line theory. Finally, for verification purpose, a prototype PD is designed, fabricated, and measured which works at dual frequencies of 1 and 2 GHz simultaneously. The good agreement between simulation and measurement results, which show good impedance matching, isolation, as well as power transmission, verifies the correctness of the design theory.

A Novel Small-Size Coupled-Line Wilkinson Power Divider for Dual-Band Applications

2013 ◽  
Vol 437 ◽  
pp. 1066-1072 ◽  
Author(s):  
Wei Min Wang ◽  
Yuan An Liu
Keyword(s):  
Design Theory ◽  
Power Divider ◽  
Dual Band ◽  
Coupled Line ◽  
Power Dividers ◽  
Full Wave ◽  
Coupled Lines ◽  
Parameters Analysis ◽  
Wilkinson Power Dividers ◽  
Circuit Configuration

A novel coupled-line circuit configuration is proposed to design small-size dual-band Wilkinson power dividers. This proposed power divider consists of three sections of coupled lines and two isolation resistors. The analytical design theory is given and the electrical parameters analysis is provided. Six numerical examples are presented to demonstrate the flexible dual-band applications. To avoid a negative isolation resistor, a practical power divider operating at 1GHz and 2.2GHz with two positive-value resistors is designed. The calculated and full-wave simulated results verify our proposed idea. Keywords: Coupled-line, dual-band, power divider.

Preparation and Characterization of Cu-Ga-Se Films of Ordered Vacancy Compound

2003 ◽  
Vol 763 ◽  
Author(s):  
S. Nishiwaki ◽  
S. Siebentritt ◽  
M. Ch. Lux-Steiner
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Bottom Layer ◽  
Soda Lime ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Chalcopyrite Structure ◽  
Soda Lime Glass ◽  
Soda Lime Glass Substrate ◽  
Glass Substrates

AbstractCu-Ga-Se films with an orderd vacancy compound (OVC) structure were prepared at substrate temperature about 500 °C by thermal co-deposition. With a preparation under extremely Se excess condition, films of the OVC were synthesized within the compositional ratio of 0.73 ≤ [Ga]/([Cu]+[Ga]) ≤ 0.86 along Cu2Se-Ga2Se3 pseudo binary system. The growth on soda-lime glass substrates improves the crystallinity compared to that on alkali-free glass. An increase in the optical bandgaps of OVC films from 1.85 eV to 1.94 eV was observed with an increase in the Ga content of the films. The deposition of Cu and Se onto Ga2Se3 films resulted in a vertically inhomogeneous film: the bottom layer with the OVC structure and the top layer with the chalcopyrite structure. A solar cell using the CuGa5.0Se8.1 film within a ZnO/CdS/CuGa-Se/Mo/soda-lime glass substrate structure showed an open circuit voltage of 947 mV, an efficiency of 2.2 %, a short circuit current density of 4.5 mA/cm2, and a fill factor of 0.52 (Air Mass 1.5, 0.5 cm2, total area).

A Novel Coupled-Line Gysel Power Divider for Dual-Band and High-Power applications

2013 ◽  
Vol 834-836 ◽  
pp. 1132-1139
Author(s):  
Wei Min Wang ◽  
Yong Le Wu ◽  
Yuan An Liu
Keyword(s):  
High Power ◽  
Design Theory ◽  
Power Divider ◽  
Dual Band ◽  
Electrical Parameters ◽  
Coupled Line ◽  
Power Dividers ◽  
Full Wave ◽  
Parameters Analysis ◽  
Mode Technique

A novel coupled-line structure is proposed to design dual-band and high-power Gysel power dividers. Based on traditional even-and odd-mode technique, the analytical design theory is given and the electrical parameters analysis is provided. Four numerical examples are presented to demonstrate the flexible dual-band applications. A practical power divider operating at 1GHz and 2 GHz is designed. The calculated and full-wave simulated results verify our proposed idea.

scholarly journals CLOSED-FORM DESIGN METHOD OF AN N-WAY DUAL-BAND WILKINSON HYBRID POWER DIVIDER

2010 ◽  
Vol 101 ◽  
pp. 97-114 ◽  
Author(s):  
Yongle Wu ◽  
Yuanan Liu ◽  
Shulan Li ◽  
Cuiping Yu ◽  
Xin Liu
Keyword(s):  
Closed Form ◽  
Design Method ◽  
Power Divider ◽  
Dual Band ◽  
Hybrid Power ◽  
Form Design

scholarly journals Mil-Std 1553 Cable Modeling for Fault Detection

2020 ◽  
Vol 9 (4) ◽  
pp. 1648-1655
Keyword(s):  
Fault Detection ◽  
Public Transportation ◽  
High Speed ◽  
Power Transmission ◽  
Detection System ◽  
Short Circuit ◽  
Detection Algorithm ◽  
Open Circuit ◽  
Test Signal ◽  
Prototype Development

Amongst major industries, the aircraft industry has gained momentum not only in public transportation, but also in defence, business and space sectors. The electrical, mechanical and electronic systems of an aircraft are all interconnected by different types of cables like hook up wires, cables for high speed data transmission, cables for power transmission, fire resistant cables, co-axial cables etc , with each type of cable having its own specifications. Military Standard 1553 (Mil-Std 1553) is one such cable primarily used for on-board aircraft sub-system communication and monitoring. Mil-Std 1553 protocol defines the physical and electrical properties of the cable. Mil-Std 1553 is a dual redundant bus, that is, there are two channels for a single bus communication. Mil-Std 1553 is prone to faults like opens or shorts because of its continuous wear and tear in aircraft environment. If a faulty cable is operated, then it possesses a high risk to the aircraft system .As of now ,there is no automatic fault detection system employed on Mil-Std 1553. Hence there is a need for automatic fault detection system on Mil-Std 1553 cables before the entire system collapses. In this regard, modeling of Mil-Std 1553 is very important since the developed model can be used for testing of the fault detection algorithm and further prototype development. Here, the Mil-Std 1553 cable has been modeled using SIMULINK/MATLAB. The cable is modeled under two different scenarios: considering only the Test Signal , considering both Test Signal and Data Signal. The cable is modeled considering all its electrical characteristics for three conditions, namely, No Fault condition, Open circuit condition and Short circuit condition. PI section is used as an elemental block for modeling of Mil-Std 1553.

Dual-band B-shaped antenna array for satellite applications

2020 ◽  
pp. 1-8
Author(s):  
Muhammad Mateen Hassan ◽  
Muzhair Hussain ◽  
Adnan Ahmed Khan ◽  
Imran Rashid ◽  
Farooq Ahmed Bhatti
Keyword(s):  
Antenna Array ◽  
Impedance Matching ◽  
Ground Plane ◽  
Bottom Layer ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Rectangular Patch ◽  
Full Wave ◽  
Satellite Applications ◽  
Strip Lines

Abstract The paper presents a 1 × 2 B-shaped antenna array for dual-band operation at 4 and 8 GHz. The antenna design consists of a rectangular patch with two annular-strip lines fabricated on the top layer and finite ground plane on the bottom layer. The array is formed by designing an optimum T-shaped microstrip line for impedance matching. The dimensions of the antenna array are 78 × 36 × 1.6 mm3. Full-wave simulations have been conducted and the measured results are in good consent with the simulated results. The measured impedance bandwidth (reference −10 dB) has been observed at 3.84–4.16 and 7.78–8.38 GHz. Measured peak gain and radiation efficiency at 4 and 8 GHz are 8.3, 9.4 dB and 82.5 and 81.2%, respectively.

scholarly journals Dry-Coated Graphite onto Sandpaper for Triboelectric Nanogenerator as an Active Power Source for Portable Electronics

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1585 ◽  
Author(s):  
Smitha Ankanahalli Shankaregowda ◽  
Rumana Farheen Sagade Muktar Ahmed ◽  
Yu Liu ◽  
Chandrashekar Bananakere Nanjegowda ◽  
Xing Cheng ◽  
...  
Keyword(s):  
Large Scale ◽  
Liquid Crystal Display ◽  
Short Circuit ◽  
Bottom Layer ◽  
Human Motion ◽  
Open Circuit ◽  
Triboelectric Nanogenerator ◽  
Portable Devices ◽  
Wearable Electronics ◽  
Dry Electrode

Developing an eco-friendly, flexible and recyclable micro-structured dry electrode for sustainable life is essential. In this work, we have developed irregular, micro-structured sandpaper coated with graphite powder as an electrode for developing a simple, low-cost, contact-separation mode graphite-coated sandpaper-based triboelectric nanogenerator (GS-TENG) as a self-powered device and biomechanical sensor. The as-fabricated GS-TENG is a dielectric-conductor model. It is made up of a bottom layer with polytetrafluoroethylene (PTFE) as a triboelectric layer, which is attached onto a graphite-coated sandpaper-based electrode and a top layer with aluminum as another triboelectric layer as well as an electrode. The forward and reverse open-circuit voltages reach upto ~33.8 V and ~36.62 V respectively, and the forward and reverse short-circuit currents are ~2.16 µA and ~2.17µA, respectively. The output generated by GS-TENG can power 120 blue light-emitting diodes connected in series, liquid crystal display and can charge commercial capacitors along with the rectifier circuit. The capacitor of 22 µF is charged upto 5 V and is sufficient to drive digital watch as wearable electronics. Moreover, the device can track signals generated by human motion, hence it scavenges biomechanical energy. Thus, GS-TENG facilitates large-scale fabrication and has potential for future applications in wearable and portable devices.

scholarly journals PERANCANGAN SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA) MENGGUNAKAN SOFTWARE CX-SUPERVISOR 3.1 PADA SIMULASI SISTEM LISTRIK REDUNDANT BERBASIS PROGRAMMABLE LOGIC CONTROLLER (PLC) OMRON CP1E NA-20-DRA

2015 ◽  
Vol 18 (2) ◽  
Author(s):  
Almuhtarom Almuhtarom ◽  
Priyo Sasmoko
Keyword(s):  
Programming Languages ◽  
Large Scale ◽  
Power Transmission ◽  
Short Circuit ◽  
Electrical Energy ◽  
Transmission System ◽  
Open Circuit ◽  
Small Scale ◽  
Electricity Transmission ◽  
Electrical Systems

Almuhtarom, Priyo Sasmoko, in this paper explain that the existence of electrical energy for human needs can not be separated, the electrical energy used by all humans on this planet of small-scale (household) to large-scale industry. Demand the amount of electrical energy and the quality of the electricity transmission system has increased over time. Disruptions in electricity transmission system could be fatal for the electrical components or the operating loss in an industry. SCADA is proposed to accommodate this problem. SCADA is able to monitor and control the disturbances in electrical systems redundant. The purpose of this final project is to simulate a SCADA system to eliminate redundant electric power transmission network failures such as open-circuit, short circuit, and overload that can be controlled directly from the plant or via an interface on the computer. Ladder diagram programming languages ​​used to design the PLC system. Hardware and software to support this thesis, such as plant redundant electrical systems, Omron PLC CP1E NA-20-DRA, Laptop, CX One 9.3 software for programming the PLC and the CX Supervisor 3.1 for building HMI. The test results indicate that the current sensor can be used to detect if an interruption occurs in the form of overload and short circuit simulate disturbances. Plant redundant electrical system can be monitored and controlled through input-output of the plant, computer interface, and the World Wide Web. There is a relay on a plant that can connect to the electricity grid cut power lines when an interruption occurs. If an interruption occurs in the form of an open circuit, short circuit or overload, alarm and disturbance indicators will be active. Keywords: SCADA, PLC, open circuit, short circuit, overload

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