PPT-CHAPTER 5 MICROWAVE ANTENNA

MICROWAVE ANTENNA Definition A conductor or group of conductors used either for radiating electromagnetic energy into space   or for   collecting   it from space or Is a structure which may be described as a metallic object often a wire or a collection of wires through specific design capable of converting high frequency current into EM wave and transmit it into free space at light velocity with high power kW besides receiving EM wave from free space and convert it into high frequency current at much lower power . 1. Microwave power B. E. Long and S. A. Cooke. Funded by the Department of Energy. Background. 1981: . Balle-Flygare. Cavity FTMW facilitated the rotational spectroscopic study of transient species. 1989: . Suenram. , . Seb. . Weidt. IQT group, University of Sussex. IQsim13, Brighton. Linear Paul trap. Experimental setup. Drive frequency: 2. π. x 20 . MHz. Ion-electrode separation: 310 . μ. m. MHz. . MHz.  . Cooling . Typically the diameter of the ground plane should be at least 3.. λ. /4. The parameters of helical antenna are-. D- diameter of a turn on the helix antenna.. C- circumference of a turn on the helix antenna.. -presentation-. DR INZ. . ZDZISŁAW. . PÓLKOWSKI. Polkowice-. 2015. University of . Pitesti and. Dolnośląska Wyższa Szkoła Przedsiębiorczości i Techniki w Polkowicach. STUDENT: . CONSTANTIN. Ankit. Jain. B.Tech. 5. th. . Sem. (ECE). IIIT Allahabad. Features :. High Gain ( 30-40 db). Low cross polarization. Reasonable bandwidth, Fractional Bandwidth being at least 5% on commercial models.. Religion. 1. We have many . "conveniences": . Computers, smart . phones, . high speed internet; email & instant messaging, GPS, remote . controls, . fast food, . and microwave ovens. . There's . nothing inherently evil about conveniences, but living in such a world can lead us to develop unhealthy spiritual attitudes. . _____ 1. Dishes holding food stay cool in a microwave oven.. _____ 2. Only containers made especially for microwave ovens can be used for cooking in a microwave oven.. _____ 3. Food in a microwave oven cooks very evenly.. Microwave ovens generate electromagnetic waves (called microwaves) which makes water move. This motion leads to friction, and friction leads to heating. Microwave heating works by heating water in foods by making water molecules vibrate. That is why dry foods like . Yudong . Tian, Christa Peters-Lidard, Ken Harrison, Sujay Kumar and Sarah Ringerud.  . http://lis.gsfc.nasa.gov/PMM/. . Sponsored by NASA . PMM Program (PI: C. Peters-Lidard). 2. Outline. 1. Why does land surface microwave emissivity matter? . In the electromagnetic spectrum the microwave radiation region is located between . infrared radiation . and . radio-waves.. Telecommunication . and microwave radar equipment . occupy many . of the band frequencies in this region. In order to avoid interference with these systems,. (Chapter 5 Antenna Design for Mobile Devices – . Zhijun. Zhang). Passive measurements. Network Analyzer. Prototype. Passive . Anechoic . Chamber Measurements. Absorber Types. Balanis. : Antenna Design. 3.1 Radiation Pattern. 3.2 Spherical Coordinate System. 3.3 Antenna Field Regions. 3.4 Antenna Efficiency. 3.5 Directivity and Gain. 3.1 Radiation Pattern. 2. Radiation pattern. (. 방사패턴. ): . Ablation. Presented by: . Symple. Surgical Inc. . The goal of this session is to. :. Introduce the concept of Microwave Ablation. Basic Physics of Microwave and other Radio Frequency Energy Sources.