scholarly journals Caracterização numérica e experimental de estruturas CSRR em antenas de microfita

2019 ◽  
Vol 1 (45) ◽  
pp. 188
Author(s):  
Álef Huan Pereira Souto ◽  
Jefferson Costa e Silva ◽  
Marília Gabriella Alves Rodrigues Santos ◽  
Alfredo Gomes Neto
Keyword(s):  
Ground Plane ◽  
Wireless Systems ◽  
Split Ring Resonator ◽  
Microstrip Antennas ◽  
Patch Antennas ◽  
Complementary Split Ring Resonator ◽  
Rectangular Patch ◽  
The Moment ◽  
4G Lte

<p>This work aims to perform the numerical and experimental characterization of CSRR (Complementary Split Ring Resonator) structures in the ground plane of microstrip antennas, for the use in 4G/LTE wireless systems in the 2.5 GHz band. Two geometries for the radiating elements of the antennas were used, the circular and the rectangular ones. Some initial equations were used to design the CSRR structures, followed by a numerical optimization process. This way, numerical and experimental analyzes of the changes in antennas characteristics were carried out, mainly in resonance frequency, bandwidth and radiation pattern. The simulated results were obtained using the commercial software ANSYS, which uses the Moment Method (MoM). The simulated and measured results of the antennas with the CSRR structures printed on their ground plane were compared with those obtained by circular and rectangular patch antennas with a conventional ground plane, we could observe a reduction in their resonant frequency, enabling the miniaturization process.</p>

scholarly journals Modal Resonant Frequencies and Radiation Quality Factors of Microstrip Antennas

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Jan Eichler ◽  
Pavel Hazdra ◽  
Miloslav Capek ◽  
Milos Mazanek
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Microstrip Antennas ◽  
Dominant Mode ◽  
Patch Antennas ◽  
Quality Factors ◽  
Radiation Quality ◽  
Resonant Frequencies ◽  
Rectangular Patch ◽  
Novel Method

The chosen rectangular and fractal microstrip patch antennas above an infinite ground plane are analyzed by the theory of characteristic modes. The resonant frequencies and radiationQare evaluated. A novel method by Vandenbosch for rigorous evaluation of the radiationQis employed for modal currents on a Rao-Wilton-Glisson (RWG) mesh. It is found that the resonant frequency of a rectangular patch antenna with a dominant mode presents quite complicated behaviour including having a minimum at a specific height. Similarly, as predicted from the simple wire model, the radiationQexhibits a minimum too. It is observed that the presence of out-of-phase currents flowing along the patch antenna leads to a significant increase of theQfactor.

scholarly journals DESIGN AND ANALYSIS OF COMPACT METAMATERIAL MIMO ANTENNA FOR WLAN APPLICATIONS

2019 ◽  
Vol 57 (2) ◽  
pp. 223
Author(s):  
Hoa Nguyen Thi Quynh ◽  
Sy Tuan Tran ◽  
Huu Lam Phan ◽  
Duy Tung Phan
Keyword(s):  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Antenna Element ◽  
Mimo Antenna ◽  
Complementary Split Ring Resonator ◽  
Antenna Performance ◽  
Multiple Input ◽  
Input Multiple Output ◽  
The Individual

A compact three-port metamaterial multiple-input-multiple-output (MIMO) antenna using complementary split-ring resonator (CSRR) loaded ground have demonstrated in order to miniaturize the size and improve the antenna performance. The antenna is designed on FR4 material and simulated by HFSS software. By loading CSRRs in the ground plane, the size reduction of 77% of the individual patch antenna element is achieved, which appeared to be the major reason for the obtained the compact MIMO antenna. Furthermore, the simulated results show that the proposed MIMO antenna achieves the total gain higher than 5 dB, the isolation less than -11 dB, the envelope correlation coefficient (ECC) value lower than 0.015, and the bandwidth of 100 MHz through the whole WLAN band from 2.4 GHz to 2.484 GHz, indicating promises for WLAN applications.

scholarly journals Rancang Bangun Antena Mikrostrip dengan Metamaterial CSRR untuk Penerima TV Digital

2018 ◽  
Vol 7 (1) ◽  
pp. 7-12
Author(s):  
Dina Mariani ◽  
Yanuar Mahfudz Safarudin
Keyword(s):  
Return Loss ◽  
Ground Plane ◽  
Split Ring Resonator ◽  
Negative Permittivity ◽  
Digital Television ◽  
Split Ring ◽  
Analog To Digital ◽  
Complementary Split Ring Resonator ◽  
Result Show ◽  
Working Frequency

Digital television technology has more benefit than analog television, for example several TV channel may included in one frequency channel. The changing from analog to digital televisions system require more innovative antenna parameter such as working frequency, bandwidth, return loss, VSWR, and gain. In other hand, the size of the antenna must be minimalized, so it can be integrated inside digital television. This research used metamaterial element of Complementary Split Ring Resonator (CSSR) method with negative permittivity that manufactured in the patch and Double Pole Ground Plane in the ground side. The antenna ad 478-694 operating frequency. Antenna design and simulation using CST (Computer Simulation Technology) Microwave Studio 2012. The result show that return-loss value < -10 dB, and VSWR = 2 at 478-625 MHz range of frequency. Te value of gain is 3.27 dBi, it has 147 MHz bandwidth, and omnidirectional radiation pattern.

Dual-frequency phase shifter deploying complementary split-ring resonator

2015 ◽  
Vol 8 (7) ◽  
pp. 1045-1050 ◽  
Author(s):  
Indhumathi Kulandhaisamy ◽  
Dinesh Babu Rajendran ◽  
Malathi Kanagasabai ◽  
Balaji Moorthy ◽  
Jithila V. George ◽  
...  
Keyword(s):  
Transmission Line ◽  
Phase Shifter ◽  
Ring Resonator ◽  
Ground Plane ◽  
Split Ring Resonator ◽  
Phase Shifters ◽  
Area Network ◽  
Dual Frequency ◽  
Split Ring ◽  
Complementary Split Ring Resonator

Phase shifters are indispensable microwave components. In this paper, a dual-frequency, passive, analog, and reciprocal phase shifter is proposed, deploying the phase-delay characteristics of complementary split-ring resonator (CSRR). A transmission line is loaded with a pair of CSRR in the ground plane and the phase variations are compared with an ideal transmission line. The proposed phase shifter operates in the industrial, scientific and medical (ISM) and wireless local area network (WLAN) bands, providing a phase of 180° at 2.4 GHz and 90° at 5.4 GHz for beam steering applications.

scholarly journals Folded monopole antenna with CSRRS for tri-band applications

2018 ◽  
Vol 7 (4.5) ◽  
pp. 514
Author(s):  
AK. Gangwar ◽  
MS. Alam
Keyword(s):  
Ground Plane ◽  
Equivalent Circuit Model ◽  
Design Procedure ◽  
Split Ring Resonator ◽  
Single Band ◽  
Monopole Antenna ◽  
Dual Band ◽  
Complementary Split Ring Resonator ◽  
Resonance Frequencies ◽  
The Right

In this paper, a miniaturize folded monopole antenna with complementary split ring resonator (CSRR) is proposed for tri-band applications. In the design procedure of the antenna, first a single band monopole antenna is designed for 2.88 GHz. For design a single band to dual band, the both arms of the radiating element (i.e. Monopole) is folded then it is resonated at 2.68GHz and 5.15GHz resonance frequencies, the resonance of the lower frequency is based on length of the monopole and higher order resonance is excited due to its folding effect. In order to extend its resonances for tri-band operation, the two identical size CSRRs (one on the left and another on the right from the feed line) are placed on the ground plane of the edge of the folded monopole, thus the entire structure is resonated at 2.47 GHz, 3.46GHz and 4.36 GHz frequencies. A simplified equivalent circuit model is developed for understanding its electrical behavior. Therefore, the proposed antenna has been suitable for WLAN, WiMAX and C-band applica- tions.   

scholarly journals Design Studies of Ultra-Wideband Microstrip Antennas with a Small Capacitive Feed

2007 ◽  
Vol 2007 ◽  
pp. 1-8 ◽  
Author(s):  
Veeresh G. Kasabegoudar ◽  
Dibyant S. Upadhyay ◽  
K. J. Vinoy
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Microstrip Antennas ◽  
Design Criterion ◽  
Air Gap ◽  
Ultra Wideband ◽  
Design Parameters ◽  
Impedance Bandwidth ◽  
Rectangular Patch ◽  
Almost All

The design of an ultra-wideband microstrip patch antenna with a small coplanar capacitive feed strip is presented. The proposed rectangular patch antenna provides an impedance bandwidth of nearly 50%, and has stable radiation patterns for almost all frequencies in the operational band. Results presented here show that such wide bandwidths are also possible for triangular and semiellipse geometries with a similar feed arrangement. The proposed feed is a very small strip placed very close to the radiator on a substrate above the ground plane. Shape of the feed strip can also be different, so long as the area is not changed. Experimental results agree with the simulated results. Effects of key design parameters such as the air gap between the substrate and the ground plane, the distance between radiator patch and feed strip, and the dimensions of the feed strip on the input characteristics of the antenna have been investigated and discussed. As demonstrated here, the proposed antenna can be redesigned for any frequency in the L-, S-, C-, or X-band. A design criterion for the air gap has been empirically obtained to enable maximum antenna bandwidth for all these operational frequencies.

Circular Complementary Split Ring Resonator Rotation for Linear Array Millimeter Wave Microstrip Patch Antenna

2021 ◽  
Vol 20 (3) ◽  
pp. 43-47
Author(s):  
Norsaidah Muhamad Nadzir ◽  
Mohamad Kamal A. Rahim ◽  
Noor Asniza Murad ◽  
Mohamed Himdi ◽  
Osman Ayop
Keyword(s):  
Millimeter Wave ◽  
Linear Array ◽  
Ground Plane ◽  
Split Ring Resonator ◽  
Dual Band ◽  
Single Element ◽  
Horizontal Polarization ◽  
Angular Rotation ◽  
Complementary Split Ring Resonator ◽  
Multiple Frequencies

This paper proposes multiple linear array millimeter wave MPAs that could operate at various frequencies depending on the angular rotation of the CSRR structure. The main contribution of this work is the range of frequencies of the linear array MPA found when the position of the CSRR structure is changed angularly. This is achieved by positioning the CSRR structure on the ground plane of the MPA and rotate it to an incremental of 22.5°. Computer Simulation Technology software is used to simulate the antenna designs. The performance of the antenna is evaluated against the single element millimeter wave MPA with similar angular rotation to the CSRR structure. The reflection coefficient graph shows at 0° rotation, the antenna has dual band performance at 26 GHz and 28 GHz. At 22.5° and 45° CSRR structure rotation, the antenna shows triple band performance with different operational frequencies and different polarization depending on the frequencies. Finally, at 67.5° CSRR structure rotation, the antenna now is operational only at 20 GHz frequency with horizontal polarization performance. Plus, the results between the single element MPA with circular CSSRR and the linear array MPA with circular CSRR shows similar behavior in which the rotation of the CSRR did not affect the antenna differently even with an increase of the number of elements. The millimeter wave MPA with CSRR angular rotation can be utilized in various applications as it covers multiple frequencies depending on the angle of rotation of the CSRR structure.

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