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 and Analysis of Ultra Low-Profile ILA on a Rectangular Conducting Plane

2018 ◽  
Vol 7 (4.44) ◽  
pp. 55
Author(s):  
Erfan Rohadi ◽  
Mochammad Firdaus Ali ◽  
Indrazno Siradjuddin ◽  
Awan Setiawan ◽  
Amalia Amalia ◽  
...  
Keyword(s):  
Input Impedance ◽  
Return Loss ◽  
Input Resistance ◽  
Conducting Plane ◽  
Feed Point ◽  
Point Position ◽  
Low Profile

The unbalanced fed ultra low profile inverted L antenna on a rectangular conducting plane is proposed and analyzed numerically and experimentally.  By adjusting the length and height of inverted L antenna, the feed point position, and the size of conducting plane, the return loss bandwidth and the directivity can be controlled. The return loss bandwidth of 2.57 % and the directivity of 4.34 dBi are obtained, when the size of conducting plane is 0.245  (: wavelength) by 0.49 , and the antenna height is /30.  The input impedance of the proposed antenna is compared with those of the conventional base-fed inverted L antenna and the base fed inverted F antenna.  Although the directivity of base-fed inverted L antenna is almost same as that of proposed antenna, its input resistance becomes very low.  In the base fed inverted F antenna, the return loss larger than 10 dB is not satisfied in the case of the antenna height less than 0.05 .  

scholarly journals Rancang Bangun Antena Mikrostrip Bowtie Pada Frekuensi 5,2 Ghz

2018 ◽  
Vol 10 (2) ◽  
pp. 15-21
Author(s):  
Aprinal Adila Asril ◽  
Lifwarda Lifwarda ◽  
Yul Antonisfia
Keyword(s):  
Dielectric Constant ◽  
Resonant Frequency ◽  
Resonance Frequency ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Microstrip Antennas ◽  
Antenna Design ◽  
Narrow Bandwidth ◽  
Simple Materials

Microstrip antennas are very concerned shapes and sizes. Can be viewed in terms of simple materials, shapes, sizes and dimensions smaller antennae, the price of production is cheaper and able to provide a reasonably good performance, in addition to having many advantages, the microstrip antenna also has its drawbacks one of which is a narrow bandwidth. In this research will be designed a microstrip antenna bowtie which works at a frequency of 5.2 GHz which has a size of 68mm x 33mm groundplane. For the length and width of 33mm x 13mm patch. This antenna is designed on a printed cicuit board (PCB) FR4 epoxy with a dielectric constant of 4.7 and has a thickness of 1,6mm. This bowtie microstrip antenna design using IE3D software. This antenna has been simulated using IE3D software showed its resonance frequency is 5.270 GHz with a return loss -23 595 dB bandwidth of 230 MHz, VSWR 1,142, unidirectional radiation pattern and impedance 43,919Ω. The results of which have been successfully fabricated antenna with a resonant frequency of 5.21 GHz with a return loss -16.813 dB bandwidth of 79 MHz, VSWR 1.368, unidirectional radiation pattern, impedance 43,546Ω and HPBW 105 °.

scholarly journals A Compact Single-Feed Circularly Polarized Microstrip Antenna with Symmetric and Wide-Beamwidth Radiation Pattern

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Xihong Ye ◽  
Mang He ◽  
Pingyuan Zhou ◽  
Houjun Sun
Keyword(s):  
Circular Polarization ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Compact Structure ◽  
Circularly Polarized ◽  
Wide Range ◽  
Half Power ◽  
Slot Aperture

A compact single-feed circularly polarized microstrip antenna is proposed to achieve symmetric radiation pattern over a wide range of observation angles. In order to reduce the radiation aperture and consequently broaden the circular polarization (CP) and the half power beamwidth (HPBW) of the antenna, a partially etched superstrate and a conducting cavity are employed in the design. Further, reasonable axial ratio (AR) and impedance bandwidths are realized within the compact structure by using a simple series crossed-slot aperture coupled feeding. As a consequence, the overall dimension of the fabricated prototype is 0.32λ0× 0.32λ0× 0.12λ0at the center operating frequency of 1.56 GHz, and a 3.0% overlapped bandwidth of 10 dB return loss (RL) and 3 dB AR is obtained. Within the bandwidth, symmetric CP radiation pattern over almost the entire upper hemisphere is observed and the HPBW is also increased from 60° to 106°.

scholarly journals Design and Implementation of Planar Fourtear Microstrip Antenna for WLAN and WiMAX Applications

2016 ◽  
Vol 16 (1) ◽  
pp. 20
Author(s):  
Ken Paramayudha ◽  
Yuyu Wahyu ◽  
Aprilia Pustpita Sari ◽  
Heroe Wijanto
Keyword(s):  
Finite Element ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Design And Implementation ◽  
Working Frequency

In this paper, the microstrip planar fourtear antenna that operate at frequency range 2300 – 2500 MHz was investigated, Some applications suitable to operate in this frequency are WiMAX at 2.3 and 2.5 GHz and WLAN at 2.4 GHz. Simulations performed with the aid of Finite Element Emthod (FEM) based software which can calculte and comply the appropriate design to be able to operate at the desired working frequency. The analyzed parameters include : SWR, impedance, return loss, radiation patterns, gain, and polarization. From the measurement, bandwidth obtained is equal to 7.69% in the frequency range of 2318,250-2500 MHz in VSWR < 2. Radiation pattern measurement was unidirectional and the polarization was elliptical.

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 An H-Shaped Microstrip Antenna with Meandered Slot Lines and H-Shaped DGS For Multiband Operation

2019 ◽  
Vol 8 (9S) ◽  
pp. 1091-1097
Keyword(s):  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Microstrip Line ◽  
Return Loss ◽  
Weather Radar ◽  
Planar Structure ◽  
Impedance Bandwidth ◽  
Peak Gain

In this paper, a microstrip antenna is presented. It has an H-shaped patch which uses meandered slots an H-shaped DGS beneath the microstrip line to support multiband operation with enhanced bandwidth. The simulated and measured results are plotted to see the performance of the antenna in terms of S11 parameter. The proposed designed resonates at 3.56, 8.04 and 10.57 GHz with a peak gain of 8.39 dB with considerable impedance bandwidth and return loss values at the desired bands. The radiation pattern plots show the conformability with the application it is designed for. The planar structure with a water-resistant substrate makes it suitable for weather radar and other 5G applications.

scholarly journals Minimization of Return Loss and Enhancing the Bandwidth of U Shaped for ‘L’ Band and ‘S’ Band Application

2020 ◽  
Vol 9 (4) ◽  
pp. 364-366
Keyword(s):  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Coaxial Cable ◽  
L Band

In this article U shaped microstrip antenna is presented for ‘L’ band and ‘S’ band utilizations. The aim of proposed antenna is to enhance the bandwidth with the minimization of return loss and this can be achieved this by varying dimension of the proposed antenna. The proposed antenna is fed by 50Ω coaxial cable using microstripline feed. During simulation it has been achieved the various results of antenna parameters like return loss, gain, radiation pattern, impedance, and VSWR to analyze the proposed antenna.

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