Input impedance and radiation pattern of a probe-fed cylindrical annular-ring microstrip antenna

1995 ◽  
Vol 8 (3) ◽  
pp. 152-156
Author(s):  
Horng-Dean Chen ◽  
Kin-Lu Wong
Keyword(s):  
Radiation Pattern ◽  
Input Impedance ◽  
Microstrip Antenna ◽  
Annular Ring

scholarly journals Analysis and Design of Gap-Coupled Annular Ring Microstrip Antenna

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Binod Kumar Kanaujia ◽  
Anil Kumar Singh
Keyword(s):  
Radiation Pattern ◽  
Theoretical Investigation ◽  
Input Impedance ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Feed Point ◽  
Annular Ring ◽  
Analysis And Design ◽  
Frequency Tunability

Theoretical investigation conducted on gap-coupled annular ring microstrip antenna is found to exhibit frequency tunability with the gap. The various parameters of the antenna such as input impedance, VSWR, return loss, and radiation pattern have been investigated as a function of gap length and feed point. It is found that the various parameters of gap-coupled microstrip antenna depend heavily on the gap length and feed points.

scholarly journals Design of Compact Tri-Band Fractal Antenna for RFID Readers

2017 ◽  
Vol 7 (4) ◽  
pp. 2036 ◽  
Author(s):  
Mohamed Ihamji ◽  
Elhassane Abdelmounim ◽  
Hamid Bennis ◽  
Mostafa Hefnawi ◽  
Mohamed Latrach
Keyword(s):  
Radio Frequency ◽  
Radiation Pattern ◽  
Radio Frequency Identification ◽  
Input Impedance ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
Physical Parameters ◽  
Fractal Antenna ◽  
Frequency Identification ◽  
Rectangular Microstrip Antenna

In this paper, a multiband and miniature rectangular microstrip antenna is designed and analyzed for Radio Frequency Identification (RFID) reader applications. The miniaturization is achieved using fractal technique and the physical parameters of the structure as well as its ground plane are optimized using CST Microwave Studio. The total area of the final structure is 71.6 x 94 mm<sup>2</sup>. The results show that the proposed antenna has good matching input impedance with a stable radiation pattern at 915 MHz, 2.45 GHz, and 5.8 GHz.

scholarly journals A compact miniature fractal planar antenna for RFID readers

2019 ◽  
Vol 15 (1) ◽  
pp. 300 ◽  
Author(s):  
Mohamed Ihamji ◽  
Elhassane Abdelmounim ◽  
Jamal Zbitou ◽  
Hamid Bennis ◽  
Mohamed Latrach
Keyword(s):  
Dielectric Constant ◽  
Radiation Pattern ◽  
Input Impedance ◽  
Microstrip Antenna ◽  
Planar Antenna ◽  
Rfid Reader ◽  
Reader System ◽  
Rfid Readers

<p>This article presents a new miniature microstrip antenna in the ISM "Industrial Scientific and Medical" band, at 2.45 GHz. This microstrip antenna is designed for RFID reader system, by exploiting the fractal technique and the CPW fed; this antenna is printed on FR4 substrate with dielectric constant of 4.4. The validated antenna has a good matching input impedance range from 2.27 GHz to 2.68 GHz with a stable radiation pattern, a gain of 2.2 dBi, and a directivity of 1.91 dB. The total area of the final circuit is 21.22 x 32.05 mm2. A prototype of the proposed antenna has been fabricated and measured.</p>

scholarly journals Modified Dual-Band Stacked Circularly Polarized Microstrip Antenna

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Guo Liu ◽  
Liang Xu ◽  
Yi Wang
Keyword(s):  
Radiation Pattern ◽  
Global Positioning System ◽  
Microstrip Antenna ◽  
High Performance ◽  
Axial Ratio ◽  
Dual Band ◽  
Optimized Design ◽  
Positioning System ◽  
Circularly Polarized ◽  
Global Positioning

A novel high-performance circularly polarized (CP) antenna is proposed in this paper. Two separate antennas featuring the global positioning system (GPS) dual-band operation (1.575 GHz and 1.227 GHz for L1 band and L2 band, resp.) are integrated with good isolation. To enhance the gain at low angle, a new structure of patch and two parasitic metal elements are introduced. With the optimized design, good axial ratio and near-hemispherical radiation pattern are obtained.

Frequency Agile Annular Ring Microstrip Antenna Loaded with MOS Capacitor

2008 ◽  
Vol 22 (10) ◽  
pp. 1361-1370 ◽  
Author(s):  
B. K. Kanaujia ◽  
A. K. Singh ◽  
B. R. Vishvakarma
Keyword(s):  
Microstrip Antenna ◽  
Mos Capacitor ◽  
Annular Ring ◽  
Frequency Agile
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