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Research of Planar Printed Antennas for WLAN and UWB Communication Systems

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Книга по Требованию    
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The measured antenna patterns also show the monopole-type omni-directional radiation patterns from 3 to about 10 GHz. Secondly, a planar triangular monopole antenna (PTMA) is presented for UWB communication. Then, a novel technique to enhance the bandwidth of the conventional PTMA is presented. With two symmetrical corrugations extended from the flat ground plane, a significant improvement on the impedance bandwidth up to about 4: 1 can be achieved. Measured VSWR of the printed PTMA with the ridged ground plane is less than 2 from 3 to 12 GHz. The measured voltage standing wave ratio is less than 3 from 4 to 10 GHz. The study of the antenna printed on a simulated PCMCIA card and that inserted inside a laptop PC are also conducted. This book presents the research of planar printed antennas for WLAN and UWB communication systems. At firsta 2. 4-GHz horizontally polarized omnidirectional planar printed antenna adopts the printed Alford-loop-type structure for WLAN applications is presented.
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Вольво, система охлаждения
Министерство Сельского Хозяйства Российской Федерации Департамент кадровой политики и образования Московский государственный агроинженерный университет имени В.П. Горячкина Кафедра иностранных языков Курсовая работа. Выполнил: Потапов В.В. Проверил: Кулешов А.В. Москва, 2004г. Содержание: he his ory of Volvo (английский оригинал) Cooli g sys em (английский оригинал) he seve s ep pa h o be er decisio s (английский оригинал) История Вольво (перевод) Система охлаждения (перевод) Семь способов принятия верных решений (перевод) he his ory of Volvo. he Volvo 1800 was superseded by he 1800 ES spor s coupe i 1971, while he 140 series was replaced by he moder 240/260 hree years la er. I he USA, he Volvo 240 was desig a ed as he s a dard for car safe y. I 1972, Volvo acquired he car divisio of Du ch carmakers DAF a d he Volvo 343 was i roduced four years la er. 1970 - Volvo's firs Spo sorship he Volvo Accide Research eam for cars was es ablished. I addi io o mo i ori g crash es i g of comple e cars a d compo e s i he labora ory, Volvo researchers were ow able o ga her valuable i forma io o real-life accide s. Field i ves iga io s were compleme ed by s a is ics.

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