Computing resonant frequency of C-shaped compact microstrip antennas by using ANFIS

2014 ◽  
Vol 102 (3) ◽  
pp. 407-417 ◽  
Author(s):  
Ali Akdagli ◽  
Ahmet Kayabasi ◽  
Ibrahim Develi
Keyword(s):  
Resonant Frequency ◽  
Microstrip Antennas

Qualification of Polyimide Based Coverlays for 900 MHz and 2.40 GHz Microstrip Antenna Applications

2012 ◽  
Vol 2012 (1) ◽  
pp. 001078-001080
Author(s):  
Deepukumar Nair ◽  
Glenn Oliver ◽  
Jim Parisi
Keyword(s):  
Resonant Frequency ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Microstrip Antennas ◽  
Frequency Detuning ◽  
Antenna Gain ◽  
Test Vehicle ◽  
Minimal Impact ◽  
Frequency Bands

Organic coverlays are required to protect microstrip circuits in most applications. The presence of coverlay can potentially influence the performance of microstrip antennas. This paper describes the qualification of polyimide based coverlays for microstrip antennas both in 900 MHz and 2.50 GHz frequency bands. An Inverted F-shaped antenna fabricated on FR-4 dielectric is used as the test vehicle and two different coverlay materials are tested with respect to key parameters like resonant frequency, S11 bandwidth, antenna gain, frequency detuning, and radiation pattern. The data presented in this paper clearly indicates polyimide materials are well suited to cover microstrip antenna circuits with minimal impact on performance.

scholarly journals Mutual Coupling Reduction in Patch Antenna Array Based on EBG Structure for MIMO Applications

2019 ◽  
Vol 63 (4) ◽  
pp. 332-342 ◽  
Author(s):  
Yahiea Alnaiemy ◽  
Taha A. Elwi ◽  
Lajos Nagy
Keyword(s):  
Resonant Frequency ◽  
Antenna Array ◽  
Mutual Coupling ◽  
Multiple Input Multiple Output ◽  
Microstrip Antennas ◽  
Separation Distance ◽  
Rectangular Slot ◽  
Antenna Performance ◽  
Before And After ◽  
Input Multiple Output

This paper presents a printed rectangular slot microstrip antenna array of two elements based on an Electromagnetic Band Gap (EBG) structure. The proposed EBG structure is invented to improve the isolation between the radiating elements for multiple-input multiple-output (MIMO) application. Single and two slotted rectangular microstrip antennas are designed on an FR-4 substrate with a dielectric constant (εr) of 4.3 and loss tangent (tanδ) of 0.025 with thickness of 1.6 mm. The proposed EBG structure is designed as one planar row of 24 slots. The proposed array performance is tested numerically using Computer Simulation Technology Microwave Studio (CSTMW) of Finite Integration Technique (FIT) formulations. The antenna performance in terms of reflection coefficient (S11), isolation coefficient (S21), radiation patterns, boresight gain and Envelope Correlation Coefficient (ECC) are investigated before and after introducing the EBG structure to identify the significant enhancements. The proposed EBG structure is located between the radiating antenna elements to reduce the mutual coupling of the proposed antenna array. The edge to edge separation distance of the proposed antennas is λ0/16, where the λ0 is the free space wavelength at 2.45 GHz. The simulated results show a significant isolation enhancement from –6 dB to –29 dB at the first resonant frequency 2.45 GHz and from –10 dB to –25 dB at the second resonant frequency 5.8 GHz after introducing the EBG structure to the antenna array.

ANFIS model for determining resonant frequency of rectangular ring compact microstrip antennas

2014 ◽  
Vol 46 (3) ◽  
pp. 483-490 ◽  
Author(s):  
Ali Akdagli ◽  
Abdurrahim Toktas ◽  
Mustafa Berkan Bicer ◽  
Ahmet Kayabasi ◽  
Deniz Ustun ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Microstrip Antennas ◽  
Anfis Model

scholarly journals An Application of Artificial Neural Network to Compute the Resonant Frequency of E–Shaped Compact Microstrip Antennas

2013 ◽  
Vol 64 (5) ◽  
pp. 317-322 ◽  
Author(s):  
Ali Akdagli ◽  
Abdurrahim Toktas ◽  
Ahmet Kayabasi ◽  
Ibrahim Develi
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Resonant Frequency ◽  
Microstrip Antennas ◽  
Multilayer Perceptrons ◽  
Ann Model ◽  
Resonant Frequencies ◽  
Average Percentage ◽  
Artificial Neural ◽  
Artificial Neural Network Ann

Abstract An application of artificial neural network (ANN) based on multilayer perceptrons (MLP) to compute the resonant frequency of E-shaped compact microstrip antennas (ECMAs) is presented in this paper. The resonant frequencies of 144 ECMAs with different dimensions and electrical parameters were firstly determined by using IE3D(tm) software based on the method of moments (MoM), then the ANN model for computing the resonant frequency was built by considering the simulation data. The parameters and respective resonant frequency values of 130 simulated ECMAs were employed for training and the remaining 14 ECMAs were used for testing the model. The computed resonant frequencies for training and testing by ANN were obtained with the average percentage errors (APE) of 0.257% and 0.523%, respectively. The validity and accuracy of the present approach was verified on the measurement results of an ECMA fabricated in this study. Furthermore, the effects of the slots loading method over the resonant frequency were investigated to explain the relationship between the slots and resonant frequency.

Numerical Computation of Resonant Frequency of Gap Coupled Circular Microstrip Antennas

2007 ◽  
Vol 21 (10) ◽  
pp. 1303-1311 ◽  
Author(s):  
P. Kumar ◽  
T. Chakravarty ◽  
G. Singh ◽  
S. Bhooshan ◽  
S. K. Khah ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Numerical Computation ◽  
Microstrip Antennas

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 EFFECT ON RESONANT FREQUENCY FOR E-PLANE MUTUALLY COUPLED MICROSTRIP ANTENNAS

2008 ◽  
Vol 3 ◽  
pp. 133-140 ◽  
Author(s):  
Indrani Ray ◽  
Mukul Khan ◽  
Durbadal Mandal ◽  
Anup Kumar Bhattacharjee
Keyword(s):  
Resonant Frequency ◽  
Microstrip Antennas
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