نتایج جستجو برای: ultra wideband

تعداد نتایج: 64872  

2010
Shaohua Jiang Miroslaw J. Skibniewski Yongbo Yuan Chengshuang Sun

s. jiang · m. j. skibniewski · y. yuan · c. sun · ultra-wide band technology applications in ... · pp 207-213 Ultra-Wide Band; frequency range; receiver; tracking; sensing

2005

In IR (Impulse Radio) network, the conventional synchronization (also called signal acquisition) method becomes inefficient and results in a certain failure of synchronization when concurrent transmissions are allowed without controlling their powers. The present invention aims to solve this problem by introducing a novel synchronization method. Moreover, the claimed method can replace the conv...

2012
Y. Liu F. Yang W. M. Lim Q. Yu X. P. Yu Z. H. Lu X. L. Zhang

In this paper, a low voltage ultra-wideband RF receiver for Software-Defined Radio (SDR) is presented. In SDR design, the radio frequency (RF) receiver should be able to receive signals over a broadbandwidth so that it can satisfy a variety of different communication standards. In the proposed design, working frequency ranging from 0.1GHz to 6GHz RF front-end for SDR, covering almost all of mat...

2007
Abbas Alighanbari Costas D. Sarris

Ultra-wideband radio is an enabling microwave technology for broadband communication and high-resolution sensing. However, the full realization of its potential requires further research on ultra-wideband signal propagation and interference with existing narrowband systems. Such questions can be rigorously resolved from the fundamental viewpoint of electromagnetic theory. Yet, this approach has...

2014
N. Vignesh G. A. Sathish Kumar R. Brindha

Ultra Wideband (UWB) has a number of applications that make it attractive for a variety of applications such as microwave imaging, wireless communications, ground penetrating radars, remote sensing and phased arrays. This paper offered the design of a tapered slot Vivaldi antenna for ultra-wideband application using FR4 substrate which has relative permittivity of 4.4. The Vivaldi Antenna is de...

2017
Jianxun Su Yao Lu Hui Zhang Zengrui Li Yaoqing (Lamar) Yang Yongxing Che Kainan Qi

In this paper, an ultra-wideband, wide angle and polarization-insensitive metasurface is designed, fabricated, and characterized for suppressing the specular electromagnetic wave reflection or backward radar cross section (RCS). Square ring structure is chosen as the basic meta-atoms. A new physical mechanism based on size adjustment of the basic meta-atoms is proposed for ultra-wideband manipu...

2012
Sumandeep kaur

In this paper hexagonal patch shape with hexagonal slot, ultra wideband antenna is proposed. The total dimensions of antenna are 55×43.5mm. Sides of hexagonal patch are taken 13mm each and hexagonal slot sides are taken as 3mm each. The antenna resonates at two frequencies in ultra wideband range (UWB). There is enhancement in BW in upper range ultra wideband frequency from 6.2 GHz to 8.2GHz du...

2012
Somaye Baghbani Alireza Mallahzadeh Navid Daryasafar L. Chen Y. Shang A. M. Abbosh S. G. Mao Y. Z. Chueh C. H. Chen C. Y. Chen C. Y. Hsu H. R. Chuang

In this paper, a new miniaturized ultra-wideband bandpass filter is simulated. The structure of the new ultra-wideband bandpass filter is constructed using stepped-impedance resonator. The input admittance of the proposed filter is calculated and compared with the conventional structure. The frequency response of the filter is simulated by an EM simulator tool. The parameters of the proposed fi...

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