with bandwidth 237 MHz (2.276-2.513 GHz) and -24.24 dB at the operating frequency 3.5 GHz with bandwidth 505 MHz (3.328-3.834 GHz) S11≤ -10 dB for the two bandwidths. The designed antenna has a low profile‚ low cost and simple feeding using microstrip line feed. Keywords—dual-band; monopole antenna; WiMAX; WLAN; resonant frequency; parasitic elements. I. INTRODUCTION Recently‚ wireless communication systems evolved dramatically. Future developments focused on the personal wireless
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Whites‚ EE 481 Lecture 10 Page 1 of 10 Lecture 10: TEM‚ TE‚ and TM Modes for Waveguides. Rectangular Waveguide. We will now generalize our discussion of transmission lines by considering EM waveguides. These are “pipes” that guide EM waves. Coaxial cables‚ hollow metal pipes‚ and fiber optical cables are all examples of waveguides. We will assume that the waveguide is invariant in the zdirection: y Metal walls b ‚ x z a and that the wave is propagating in z as e
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8/4/2014 Exam Details | Made Easy Call Us : 011-45124612 | Site Map Google Home IES GATE PSUs QUICK LINKS Courses News & Events OUR CENTRES : Delhi Online Admissions People Indore Archive Bhubaneswar Made Easy IES 2014 Online Test Series Enquiry Jaipur Contact Us Lucknow About Us Upcoming Batches Admissions INDIAN ENGINEERING SERVICES : IES What is IES? How to prepare for IES? IES 2014 Eligiblity IES Cut-Off Marks
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IES CATEGORY IV - ELECTRONICS AND TELECOMMUNICATION ENGINEERING Group A Services/Posts (i) Indian Railway Service of Signal Engineers. (ii) Indian Railway Stores Service (Tele-communication/Electronics Engineering Posts). (iii) Indian Ordnance Factories Service (Engineering Branch) (Electronics Engineering Posts). (iv) Indian Naval Armament Service (Electronics Engineering Posts). (v) Central Power Engineering Service (Electronics & Telecommunication Engineering Posts) (vi) Assistant
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results are calculated‚ and what these results mean. Let us start with our amplifier example: In this example‚ let us chose three elements where we want to see their effects on the Gain of the amplifier. These elements are: W (the width of the microstrip lines)‚ a resistor (R)‚ and a Capacitor (C). Since we chose three
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figure‚ the Yagi-Uda antenna was built on a FR4 substrate (εr = 4.4) with the thickness of 1.6 mm. The design consists of one director element‚ a driven element and a ground plane acting as a reflector. To enhance the gain of the antenna coupling microstrips and metal plate were placed‚ that focus the entire beam towards a driven dipole. Fig. 4.1: Simulated Yagi-Uda antenna 4.3 SIMULATED RESULTS After simulating the design different parameters of antenna are obtained such as return loss
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A cat’s-whisker detector (sometimes called a crystal detector) is an antique electronic component consisting of a thin wire that lightly touches a crystal of semiconducting mineral (usually galena) to make a crude point-contact rectifier. Developed by early radio researchers Henry H. C. Dunwoody‚ G. W. Pickard and others‚ this device was used as the detector in early crystal radios‚ from about 1906 through the Second World War‚ and gave this type of radio receiver its name. Crystal radios were the
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Wireless Power Transmission – A Next Generation Power Transmission System A.MUTHULAKSHMI K.DHIVYALAKSHMI III-Yr EEE III-Yr EEE Mepco Schlenk Engg.college Mepco Schlenk Engg.college Sivakasi. Sivakasi. ABSTRACT- In this paper‚ we present the concept of transmitting power without using wires i.e.‚ transmitting power as microwaves from one place to another is in order to reduce the transmission and distribution losses. This concept is known as Microwave Power
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Ball Aerospace Ryan F. Graves MGMT 325 From wood-jacketed tins to aerospace Ball Aerospace & Technologies Corp. is a manufacturer of spacecraft‚ components‚ and instruments for national defense‚ civil space and commercial space applications. Ball Aerospace also has many other products and services for the aerospace industry‚ including lubricants‚ optical systems‚ star trackers and antennas. As a wholly-owned subsidiary of the Ball Corp.‚ Ball Aerospace was cited in 2008 as the 96th
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“Electromagnetic Fields”‚ 2nd ed.‚ John Wiley & Sons‚ Inc. 1986 [5] C.A.Balanis‚ “Antenna Theory”‚ 3rd ed. New Jersey USA‚ John Wiley & Sons 2005. [6] http://www.antenna-theory.com/antennas/patches/antenna.php [7] K.Sakaguchi‚ N.Hasabe‚ “A small microstrip antenna consisting of a slot cut radiator and short pins”‚ Antennas and Propagation‚ 1991. ICAP‚ Seventh international conference on (IEEE)‚ 15-18 apr. 1991 [8] D.M. Pozar‚ “Microwave Engineering”‚ 3rd ed. John Wiley & Sons‚ Inc. 2005 [9] S.Vajha
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