deg. In this case parasitic element is director. Optimum distance between reflector to driven element varies between 0.15-0.25 Lambda. Length of reflector to director decreases in order of about 0.5 Lambda. The input impedance of folded dipole increases in order of n^2 (impedance of dipole). Balanced feed is given to the antenna. If you use a co-axial then BALUN (balanced to unbalanced transformer is used . Application (a)TV reception in VHF Band (30-300 MHz). (b)It is also used in HF‚ VHF‚ UHF
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PERFORMANCE ENHANCEMENT OF RECTANGULAR MICRO-STRIP PATCH ANTENNA AT 2GHz FOR WLAN APPLICATION A Synopsis Submitted In Partial Fulfillment of the Requirements For the Degree of MASTER OF TECHNOLOGY in Electronics & Communication Engineering by NM Under the supervision of Asst. Prof GAUTAM BUDDH TECHNICAL UNIVERSITY (Formerly Uttar Pradesh Technical University) LUCKNOW May‚ 2013 CERTIFICATE Certified that has carried out the research work presented in this synopsis entitled
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this paper we design a simple microstrip patch antenna having rectangular shape. A good impedance matching condition between the line and patch without any additional matching elements depends heavily on the antenna parameters. The patch is designed to resonate over the frequency 10 GHz. The current and field distributions have been examined. The frequency domain characteristics such as return loss‚ impedance curve and smith chart have also been analyzed. The results of both the software IE3D and
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SYNOPSIS Title :- Robust Face-Name Graph Matching for Movie Character Identification. Domain :- 1. Face detection system. 2. Language:- C# Group Members :- 1.Pallavi S. Malode. 2.Archana S. Aher. 3.Sonali M.Gotraj. Introduction About METHODOLOGY:- Automatic face identification of characters in movies has
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on RAID. 14) Bridge is used for which of the OSI layer? 15) questions are based on various OSI layer and TCP/IP. 16) Which type of feedback is used in amplifier a) +ve b) -ve c) both a and b d) none of these? 17) question based on i/p impedance of transmission line of a given wavelength. 18) What is three things for workstations of DNS server? 19) Which of the followinf is free-running?a)monostable multivibrator ‚b)astablemultivibrator‚ c)both a and b‚ d) none of these? 20) questions
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SHORT-CIRCUIT / OVERLOAD PROTECTION SYSTEMS 2 OHM STEREO STABLE / 4 OHM MONO PWM MOSFET SUPPLY POWER & PROTECTION INDICATORS Signal / noise Ratio >92dB Frequency Response +1.0db 10Hz - 30KHz HPF LPF Input Voltage Range High Impedance RCA/LINE Level Input Impedance 50Hz - 650Hz 50Hz - 650Hz 11 - 16 Volts DC 47K Ohms 4 - POSITION SELECTABLE CROSSOVER (Hp - Lp - Bp & Full). INFINITELY VARIABLE X-OVER POINT (50 - 650) /500 - 6.5k (X10) POWER RATINGS & FUSE 18 db BASS BOOST @ 45 Hz (Switchable
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of Reflection Coefficient‚ explain the construction of the Smith Chart. It is NOT necessary to derive the equations for the constant impedance and constant reactance circles. [8 marks] It is a polar plot of the complex reflection coefficient. It is also known as the 1-port scattering parameter s or s11‚ for reflections from a normalised complex load impedance z = r + jx; [4 marks] [2marks]
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References: David M. Pozar‚ Microwave Engineering 2nd Edition‚ John Wiley & Sons‚ inc‚ New york‚ United State of America‚ 1998. Merrill I. Skolnik‚ “Radar handbook”‚ 1990‚ chap 10. Andrei Grebennikov‚ “Power combiners‚impedance transformers and directional couplers: Part II”‚ 2008.
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input impedance of the stub is purely reactive; either capacitive or inductive‚ depending on the electrical length of the stub‚ and on whether it is open or short circuit. Stubs may thus be considered to be frequency-dependent capacitors and frequency-dependent inductors. Because stubs take on reactive properties as a function of their electrical length‚ stubs are most common in UHF or microwave circuits where the line lengths are more manageable. Stubs are commonly used in antenna impedance matching
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Principles of Electronics 280 11 Multistage Transistor Amplifiers 11.1 Multistage Transistor Amplifier 11.2 Role of Capacitors in Transistor Amplifiers 11.3 Important Terms 11.4 Properties of dB Gain 11.5 RC Coupled Transistor Amplifier 11.6 Transformer-Coupled Amplifier 11.7 Direct-Coupled Amplifier 11.8 Comparison of Different Types of Coupling 11.9 Difference Between Transistor And Tube Amplifiers INTR ODUCTION INTRODUCTION
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