Active impedance based on the cavity model of a circular microstrip antenna element for an infinite planar array antenna

2002 ◽  
Author(s):  
T. Takahashi ◽  
M. Ohtsuka ◽  
Y. Konishi
Keyword(s):  
Microstrip Antenna ◽  
Array Antenna ◽  
Antenna Element ◽  
Cavity Model ◽  
Planar Array ◽  
Circular Microstrip Antenna ◽  
Active Impedance ◽  
Infinite Planar

scholarly journals Position Tolerance Design Method for Array Antenna in Internet of Things

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Congsi Wang ◽  
Shuai Yuan ◽  
Xiaodong Yang ◽  
Wei Gao ◽  
Cheng Zhu ◽  
...  
Keyword(s):  
Internet Of Things ◽  
High Performance ◽  
Design Method ◽  
Array Antenna ◽  
Antenna Element ◽  
Sidelobe Level ◽  
Analysis Theory ◽  
Planar Array ◽  
Gain Loss ◽  
Novel Design

The position error of array antenna significantly deteriorates the gain and sidelobe of the array, which seriously hinders the realization of high performance of communication antenna for Internet of Things (IoT). Based on the sensitivity analysis theory, the sensitivity of the array radiation field with respect to the position of the antenna element is derived. Besides, a novel design method of position tolerance for array antenna is proposed and applied to a 20×20 planar array. Compared with the array designed by traditional method, the gain loss is basically the same (being 0.5 dB), while the peak sidelobe level is lowered by 1.937 dB (φ=0°)/1.586 dB (φ=90°). Besides, the uncertainty analysis results show that the newly designed array has a much higher chance to achieve the desired performance, which fully demonstrates the innovation and effectiveness of the new method.

Design of a Miniaturization Microstrip Antenna and Cavity Model Analysis

2013 ◽  
Vol 340 ◽  
pp. 427-430
Author(s):  
Yun Xing Yang ◽  
Hui Chang Zhao ◽  
Si Chen ◽  
Yong Chen
Keyword(s):  
Resonant Frequency ◽  
Microstrip Antenna ◽  
Bessel Functions ◽  
Simple Structure ◽  
Engineering Application ◽  
Model Analysis ◽  
Cavity Model ◽  
Theory Analysis ◽  
Magnetic Wall ◽  
Circular Microstrip Antenna

On the demand of miniaturization of antenna, this paper presents a circular microstrip antenna whose part of its port is sealed. Changing part of its magnetic wall into electric wall, then a decimals mode which exist between andis proposed. Elaborating the theory of reducing the resonant frequency with Bessel functions characteristics and resonance formula of circular microstrip antenna. Using the HFSS for simulation, the resonant frequency of the antenna change from 3.0 GHz to 1.2 GHz. The results prove the reliability of theory analysis. The size could be reduced nearly 60% compared with ordinary antenna. The antenna has a simple structure and can be applied to engineering application.

scholarly journals Analysis and Design of Circular Shape Microstrip Antenna for Wireless Communication System

2011 ◽  
pp. 113-119
Author(s):  
Sachin Rai ◽  
D. K. Srivastav
Keyword(s):  
Resonant Frequency ◽  
Cylindrical Cavity ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
Transverse Magnetic ◽  
Antenna Element ◽  
Practical Result ◽  
Analysis And Design ◽  
Circular Shape ◽  
Circular Microstrip Antenna

The circular microstrip antenna element is formed by radiating disk closely spaced above a ground plane. It is modeled as a cylindrical cavity with magnetic walls which can be resonant in the transverse magnetic modes. This circular shape microstrip antenna is analysed using cavity model and fields within the cylindrical cavity, radiation pattern and resonant frequency have been calculated. In this paper the circular microstrip antenna is designed at resonant frequency r f = 2.5 GHz. A suitable substrate of relative permittivity r 􀁈 = 4.2 and of thickness h = 1.6 mm is used to design the antenna. The simulation of this microstrip antenna is done on IE3D software and matlab. At last the simulation result and practical result of return loss are compared.

Planar array antenna using both-sided MIC's feeder circuits

2004 ◽  
Vol 87 (7) ◽  
pp. 23-30 ◽  
Author(s):  
Kozo Egashira ◽  
Eisuke Nishiyama ◽  
Masayoshi Aikawa
Keyword(s):  
Array Antenna ◽  
Planar Array
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