نتایج جستجو برای: planar microstrip circuit

تعداد نتایج: 182005  

2012

Analysis and design of the planar microstrip antenna have been discussed in the preceding chapters. Planar microstrip antenna by and large can be considered to have reached its maturity. Development of conformable antennas on non planar surfaces lags behind vis-à-vis planar microstrip antennas. Relatively non planar or microstrip antennas conformable to non planar surfaces are at present topic ...

2015
Xin-Huai Wang Yang Bing Xu Le Kang Xiao Shuang Li Wei Jian He Xiao Wei Shi

A novel planar dual-band microstrip power divider is proposed in this paper. The circuit is composed of two sections of transmission line, short-circuited stub line and planar resistor, which can provide high isolation and good amplitude balance simultaneously at two frequencies. The closed-form equations are derived, and the design procedures of dual-band power divider are given. To certify th...

2012
Ke Li Minghua Zhao Yong Fan Zhongbo Zhu Wanzhao Cui

Nowadays, there is expanding interest in planar compact microstrip filters applied to microwave wireless system. The compact microstrip resonant cell (CMRC) and spiral compact microstrip resonant cell (SCMRC) are more and more popular in filter design due to their slow-wave and band-stop effects. In this paper, a novel double-folded SCMRC (DSCMRC) is proposed, analyzed and measured, which turns...

Journal: :Electronics 2023

In this paper, a compact antenna design method is proposed for microstrip patch antennas using double-layered defected ground structure (DGS) configuration. While conventional single-layered yields lower resonant frequency and Q-factor, smaller circuit size can be achieved an additional substrate with higher dielectric constant. The reduction obtained from the LC elements analytically explained...

Journal: :the modares journal of electrical engineering 2004
ali ghafoorzadeh yazdy

in this paper, a generalized method for accurate full-wave analysis of shielded mic's and the three-layer microstrip structure enclosed in a rectangular cavity based on mixed potential integral equation (mpie) derived in real space have been developed. method of moments (mom) with galerkin technique has been used for the solution of the integral equation to obtain the surface electric currents ...

2008
M. Ansarizadeh A. Ghorbani R. A. Abd-Alhameed

Computation of the broadband matching potential of a microstrip antenna requires the wideband lumped equivalent circuit of the antenna. The general topology of the equivalent circuit of rectangular microstrip patch antennas has been used to model the feedpoint impedance of microstrip antennas over a wide frequency band and equivalent circuit parameters are determined using optimization techniqu...

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...

2010
M. Kumar A. Basu S. K. Koul

Abstract—In this paper, the design and development of a novel active antenna including circuits for Ultra-wide band (UWB) pulse generation and transmission have been described. In this design a pulse with pulse-width approximately 150 ps and amplitude 500 mV (peak-topeak) was generated using a single high electron mobility transistor (HEMT) as the active device (and an optional Schottky diode f...

2014
Lee Chia Ping Chandan Kumar Chakrabarty

This study describes the bending effect on an Ultra Wideband (UWB) microstrip patch antenna on the antenna performance in terms of impedance bandwidth and radiation pattern. Comparison is done between the UWB planar antenna and the bent UWB antenna. The bending effect causes shift in resonant frequencies with slight change in the impedance bandwidth. A circuit model comprising lumped elements i...

2013
Yu-Ming Lee Shuming T. Wang Hsien-Chiao Teng

Abstract—A functional microstrip circuit module for annular slot antenna is proposed. This module consists of an annular microstrip line component, two PIN diodes and a DC bias circuit. Reconfigurable circular polarizations can be simply controlled by this functional module. Axial ratio is adjustable by changing the clip angle of the notch made by the annular microstrip line component. Simulate...

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