نتایج جستجو برای: ultra broad band

تعداد نتایج: 320187  

Journal: :Proceedings of the International Astronomical Union 2010

Journal: :Monthly Notices of the Royal Astronomical Society 2017

Journal: :IEEE Transactions on Information Theory 2002

Journal: :IEEE Transactions on Nuclear Science 1981

Journal: :The Journal of the Institute of Television Engineers of Japan 1965

Journal: :The Journal of the Acoustical Society of America 1975

Journal: :Material Science Research India 2012

2014
Ami A. Desai Saleha A. Shaikh Amit A. Deshmukh

The ultra wide band antennas are required in applications where larger bandwidth for the transmitting signal is needed. They cover wide bandwidth in the range from 500 MHz to the frequencies above 8000 MHz. In this paper, a review of various techniques to realize ultra wide band microstrip antennas (MSA) is presented. They are realized by using different techniques like basic planar monopole an...

2017
Ruifang Li Dong Wu Yumin Liu Li Yu Zhongyuan Yu Han Ye

A perfect ultra-narrow band infrared metamaterial absorber based on the all-metal-grating structure is proposed. The absorber presents a perfect absorption efficiency of over 98% with an ultra-narrow bandwidth of 0.66 nm at normal incidence. This high efficient absorption is contributed to the surface plasmon resonance. Moreover, the surface plasmon resonance-induced strong surface electric fie...

Journal: :IEEE Transactions on Microwave Theory and Techniques 1999

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