EC1403 MICROWAVE ENGINEERING UNIT-1 - BASIC MICROWAVE COMPONENTS INTRODUCTION TO F MICROWAVE ENGINEERING Modern electromagnetic theory was formulated in 1873 by James Clerk Maxwell solely from mathematical considerations. Maxwell’s formulation was cast in its modern form by Oliver Heaviside‚ during the period 1885 to 1887.Heinrich Hertz‚ a German professor of physics understood the theory published by Maxwell‚ carried out a set of experiments during 1887-1891 that completely
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optimizing the antenna dimensions and the aperture position. The simulation of this antenna has been made by advanced design system (ADS) in the band of frequency between 50 Hz and 3.2 GHz‚ leading to three resonant frequencies and showing a good impedance bandwidth performance to cover the required bandwidth of the GSM (890– 960 MHz)‚ UMTS (1920–2170MHz) and WLAN/ISM (at 2.45GHz) bands. Key words: Microstrip patch Antenna‚ dual-band‚ GSM‚ UMTS‚ ISM and WLAN. INTRODUCTION In the last few years
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and increase the power transfer capability. This paper also deals with the basic concept involved in the usage of FACT controllers which are capable of controlling up to three system parameters; voltage magnitude‚ phase angle and transmission impedance. The simulation results for VAR compensation with and without one of the FACT controllers named THYRISTOR CONTROLLED SERIES CAPACITOR is also shown. T he next part of our presentation begins with a brief historical perspective on the development
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Task 1 [P3‚ M1] Describe/explain potential sources of energy intake and expenditure and the factors that affect intake and expenditure such as basal metabolism‚ age‚ gender‚ climate and physical activity. Food is a source of energy intake as it contains carbohydrates; there main function is to store energy in the muscles. Carbs are a macronutrient and come in two different forms‚ simple which are foods like chocolate and sweets these release energy quickly‚ the other form is complex which are foods
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Sixth Edition‚ last update July 25‚ 2007 2 Lessons In Electric Circuits‚ Volume II – AC By Tony R. Kuphaldt Sixth Edition‚ last update July 25‚ 2007 i c 2000-2010‚ Tony R. Kuphaldt This book is published under the terms and conditions of the Design Science License. These terms and conditions allow for free copying‚ distribution‚ and/or modification of this document by the general public. The full Design Science License text is included in the last chapter. As an open and collaboratively
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STUDY OF MEASUREMENT AND REDUCTION OF RADAR CROSS SECTION (RCS) A thesis submitted in partial fulfillment of the requirements for the degree of Bachelor of Science In Aeronautical Engineering By Mohammad Abul Rahat Chowdhury Syed Rashedur Rahman Umme Salma Tania Student ID: 200922045 Student ID: 200922046 Student ID: 200922063 Under the supervision of Group Captain Md. Afzal Hossain‚ psc Head‚ Department of CSE‚ MIST. Department of Aeronautical Engineering MILITARY INSTITUTE OF SCIENCE
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Design of Compact Dual-Band Microstrip Patch Antenna for GPSK-PCS Operation Ho-yong Kim’‚ Yong-nn Lee‚ Chung-ho Won‚ Hong-min Lcc Department of Electronics EngineeringKyon@ Univerrily hi-Dong‚ Yeongtong-Cu‚ Suwon-Si‚ Kyonggi-do‚ Korea email: hyounrsn@hotmail.com lnlraduetion In recent years‚ with the advance o f technology‚ the demand for an antenna operating a1 mutibands i s increasing rapidly. Such as GPS and K-PCS‚ The multi-hand antennas with one feeding pon use the multiple resonance
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results are compared to and found in accordance with time simulations. In terms of equivalent impedance and earth fault behaviour‚ the main difference between the new rural cable distribution systems and conventional urban systems‚ is that the zero sequence series impedance of the rural systems is not necessarily negligible. Since the zero sequence series impedance is partly resistive‚ the equivalent impedance of the system has a resistive component that cannot be compensated for by use of conventional
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A function of the middle ear is an impedance matching between the air in the outer ear and the fluid in the inner ear. There are three things that help us deal with the 30dB loss. One of them is the area difference between the tympanic membrane and the ossicles which makes up about 24.7dB. As sound
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should be noted that‚ increasing the loop gain of control system can enhance the inverter output impedance and reduce the current distortion caused by the grid voltage. However‚ this approach is compromised by the system stability requirement. Another way which has received special attention recently‚ is using feedforward of the grid voltage in control system. This method can boost the inverter output impedance very well but‚ introduces negative phase angle to the control system in weak grids which might
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