نتایج جستجو برای: microstrip discontinuity

تعداد نتایج: 15155  

2009
Junho Choi Seongmin Pyo Sang-Min Han Young-Sik Kim

Microstrip antennas have been widely used for aerospace applications and in small portable wireless communication equipments because of their compactness, light-weight, low-profile, and relative ease of fabrication. The small size is an important requirement for portable applications. There are various types of microstrip patch configurations. In general, the size of a microstrip patch is about...

2016
Márcio C. F. Macedo Antônio L. Apolinário

For convenience, let us rewrite v(x,y) as a function of three parameters v(dc,don, p): the compressed discontinuity dc, the oriented normalized discontinuity don, and the relative coordinates of the screen-space pixel in the projected light space p. For the parameters dc and p, the description given in the Section 3.1 of the paper is sufficient for this supplementary document. However, we need ...

2006
Wojciech J. Krzysztofik

By loading properly arranged slots in an equilateraltriangular microstrip patch, a dual-frequency and broadband operations of a single-feed triangular microstrip antenna are presented. Details of the proposed dualfrequency and broadband designs are described and simulated results of nearand far-field parameters are presented and discussed.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1377

the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...

2007
Steven Franks Ivan Ivić

This paper is partly born of an increasing sense of uncertainty about how to do syntax. Time was, we linguists had at our disposal a generally accepted arsenal of analytic devices to deal with a familiar range of constructions and phenomena. However, as the phenomena under study began to proliferate, so did the analyses. The increasingly baroque GB architecture began to collapse under the weigh...

2005
B. J. Wood

The 41 0-kilometer seismic discontinuity is generally considered to be caused by a phase transformation of the main constituent of the upper mantle, olivine, ot-(Mg,Fe)2SiO4, to P-(Mg,Fe)2SiO4. Recent data show that H20 dissolves in olivine and other nominally anhydrous mantle minerals and that the partitioning of H20 between olivine and P-(Mg,Fe)2Si04 is about 1:10. Such behavior strongly affe...

2012
Ayesha Aslam

A simple impedance matching technique for inset feed grooved microstrip patch antenna based on the concept of coplanar waveguide feed line has been developed and investigated for a printed antenna at X-Band frequency of 10GHz. The proposed technique has been used in the design of Linear Grooved Microstrip patch antenna array. The characteristics of the antenna are determined in terms of Return ...

2009
B. Wu Y. Pang C. Wang D. Vigneron X. Zhang

Introduction: Ultra-high field transceiver coil array holds many advantages and unique capabilities over the conventional non-array volume transceiver coils such as B1 shimming/manipulating and parallel excitation for human studies. The transceiver array can be either an array of loops or an array of straight microstrip elements [1-3]. Usually the mutual coupling in such arrays is minimized by ...

2011
Mehdi Abioghli Meshkin Shahr Branch

In this paper, we propose a novel microstrip antenna for operating over a three frequency bands, covering the 2.4/5.2/5.8 GHz WLAN and 2.5/3.5/5.5GHz WiMAX bands. The proposed antenna occupies an area of 30 mm  40mm, when printed on FR4 substrate (εr=4.4, h=0.8mm). The antenna comprises of a triangular patch section, L-shaped parasitic elements on the edges of triangular patch and a 50Ω micros...

2004
Yu-De Lin

1 WATERHOUSE. R.B : 'Small microstrip patch antenna', Electron. Lett., 1995, 31, pp. 604605 2 ROWLEY. J.T., and WATERHOUSE. R.B.: 'Performance of shorted microstrip patch antennas for mobile communications handsets at 1800MHz', IEEE Trans. Antennas Propug., (to appear) 3 WATERHOUSE, R.B., ROWLEY, J.T., and JOYNER. K.H.: 'Stacked shorted patch', Electron. Lett.. 1998, 34, pp. 612-614 4 TARGONSKI...

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