scholarly journals Implications of Metamaterial on Ultra-Wide Band Microstrip Antenna Performance

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 677
Author(s):  
Elham A. Serria ◽  
Mousa I. Hussein
Keyword(s):  
Microstrip Antenna ◽  
Return Loss ◽  
Ring Resonator ◽  
Ground Plane ◽  
Wide Band ◽  
Ring Resonators ◽  
Ultra Wide Band ◽  
Antenna Performance ◽  
Loss Maximum ◽  
Good Agreement

This study is addressing the slotted ring resonator effect on the performance of the ultra-wide band (UWB) microstrip antenna. Two types of metamaterial with double slotted ring resonators (SRR), circular (C-SRR) and square (S-SRR), are studied and implemented on back of the antenna. The design examines the effect of the number of the SRR and its position with respect to the antenna’s ground plane and the rotation of the inner and outer C-SRR rings on different antenna characteristics. The dimensions of the antenna are 45 mm × 31 mm × 1.27 mm. The implementation of the SRR increased the antenna bandwidth to cover the range from 2.2 GHz to 9.8 GHz with rejected bands and frequencies. Antenna simulated characteristics like return loss, maximum gain and radiation pattern are obtained utilizing HFSS. The return loss measurement and the VSWR of the antenna with all SRR configuration studied are in good agreement with simulated results.

scholarly journals A Novel Compact Microstrip UWB Rectangular Stair Slot Antenna for the Analysis of Return Losses

2019 ◽  
Vol 8 (10) ◽  
pp. 4597-4603 ◽  
Keyword(s):  
Return Loss ◽  
Wide Band ◽  
Directional Pattern ◽  
Slot Antenna ◽  
Ultra Wide Band ◽  
Radiation Patterns ◽  
Uwb Antenna ◽  
Antenna Performance ◽  
Ansoft Hfss ◽  
Radiation Behavior

This article deals with the various designs of a novel compact microstrip fed UWB antenna to investigate the corresponding return losses of different structures. The dimension of the designed antenna is 33 x 19 x 1.9 mm3 with FR4 substrate and it can be operated from 2.846 - 11.7458 GHz. The effects of varying the structure of antenna are to exhibit the investigation of corresponding return losses. Different structures of antenna are simulated in Ansoft HFSS simulator. The results of return losses and radiation patterns are explored with the ultra wide band (UWB) rectangular Stair slot antenna. The modified structure of antenna shows the minimized return loss with an enhanced bandwidth that satisfies good UWB characteristics. Antenna performance can also be explored from the radiation behavior of the antenna which is relatively omni-directional pattern for rectangular Stair slot antenna

Circularly polarized microstrip antenna arrays with reduced mutual coupling using metamaterial

2015 ◽  
Vol 8 (8) ◽  
pp. 1253-1263 ◽  
Author(s):  
R. Hafezifard ◽  
Jalil Rashed-Mohassel ◽  
Mohammad Naser-Moghadasi ◽  
R. A. Sadeghzadeh
Keyword(s):  
Antenna Arrays ◽  
Microstrip Antenna ◽  
Mutual Coupling ◽  
Ground Plane ◽  
High Gain ◽  
Ring Resonators ◽  
Magnetic Characteristics ◽  
Circularly Polarized ◽  
Antenna Performance ◽  
Left Handed

A circularly polarized (CP) and high gain Microstrip antenna is designed in this paper using metamaterial concepts. The antenna, built on a metamaterial substrate, showed significant size reduction and less mutual coupling in an array compared with similar arrays on conventional substrates. Demonstrated to have left-handed magnetic characteristics, the methodology uses complementary split-ring resonators (SRRs) placed horizontally between the patch and the ground plane. In order to reduce mutual coupling in the array structure, hexagonal-SRRs are embedded between antenna elements. The procedure is shown to have great impact on the antenna performance specifically its bandwidth which is broadened from 400 MHz to 1.2 GHz for X-band and as well as its efficiency. The structure has also low loss and improved standing wave ratio and less mutual coupling. The results show that a reduction of 26.6 dB in mutual coupling is obtained between elements at the operation frequency of the array. Experimental data show a reasonably good agreement between simulation and measured results.

scholarly journals A Compact Dual Notch Frequency Reconfigurable Antenna for WIMAX,DSRC, RADAR and Ku band Communication Applications

2021 ◽  
Vol 9 (2) ◽  
pp. 740-746
Author(s):  
Vutukuri Sarvani Duti Rekha, Et. al.
Keyword(s):  
Surface Current ◽  
Wide Band ◽  
Radiation Efficiency ◽  
Ultra Wide Band ◽  
Antenna Performance ◽  
Simulation Based ◽  
Narrow Bands ◽  
Peak Gain ◽  
Good Agreement ◽  
Ku Band

A frequency reconfigurable ultra-wide band antenna with dual notch bands is proposed in this paper. PIN diodes are located on ultra-wide band monopole antenna and are investigated for frequency reconfigurable characteristic of the proposed antenna. Multi-bands and narrow bands have been achieved by different combinations. Proposed antenna is fabricated on FR-4 substrate of dimensions 37 x 40 x 0.8mm3. For the successful combinations, antenna performance parameters like S11 characteristics, surface current distribution, peak gain, radiation efficiency and 2D radiation patterns are analyzed and illustrated in the paper. Peak gain of 4.83dB is obtained in operating band for D1, D2= 0, 1 combination. Radiation efficiency is not less than 70% in the entire operating bands. Results are analyzed experimentally for validating proposed antenna. Simulation based results and measured results are in good agreement.

scholarly journals A CPW - Fed Octagonal Ring Shaped Wide Band Antenna for Wireless Applications

2018 ◽  
Vol 7 (3) ◽  
pp. 87-92 ◽  
Author(s):  
P. Khanna ◽  
A. Sharma ◽  
A. K. Singh ◽  
A. Kumar
Keyword(s):  
Microstrip Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Wide Band ◽  
Impedance Bandwidth ◽  
Wireless Applications ◽  
High Frequency Structure Simulator ◽  
High Impedance ◽  
Ring Antenna ◽  
Operating Bandwidth

A CPW – Fed octagonal ring shaped antenna for wideband operation is presented. The radiating patch of proposed octagonal ring antenna consists of symmetrical slot in place of conventional annular ring microstrip antenna. The ground plane consists of two rectangular slots, while the radiator and the ground plane are on same plane that utilizes the space available around the radiator. The proposed antenna is simulated through Ansoft’s High Frequency Structure Simulator (HFSS). Measured result shows balanced agreement with the simulated results. The prototype is taken with dimensions 47 mm × 47 mm × 1.6 mm that achieves good return loss, constant group delay and good radiation patterns over the entire operating bandwidth of 2.0 to 9.5 GHz (7.5 GHz). The proposed antenna achieves high impedance bandwidth of 130%. Thus, the proposed antenna is applicable for S and C band applications.

scholarly journals Microstrip antenna with DGS based on CSRR array for WiMAX applications

2019 ◽  
Vol 9 (1) ◽  
pp. 157
Author(s):  
Ajay V. G. ◽  
Parvathy A. R. ◽  
Thomaskutty Mathew
Keyword(s):  
Resonant Frequency ◽  
Microstrip Antenna ◽  
Patch Size ◽  
Return Loss ◽  
Ground Plane ◽  
Simulation Software ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Novel Method

<span lang="EN-US">This paper reports a novel method for designing a miniaturized microstrip antenna with DGS based on CSRR array which operates in the frequency of 2.6GHz for low band WiMAX application. The proposed antenna is designed using ANSYS HFSS simulation software. The antenna with optimized parameters is fabricated using FR-4 substrate of thickness 1.6 mm. The simulated and measured performances of the antenna in terms of return loss, directivity and radiation patterns are presented in this work. When Complimentary Split Ring Resonators (CSRRs) array are placed on the ground plane, the resonant frequency is shifted  to a lower value and patch size is reduced .The measurements were taken and compared with the simulated results. The performance characteristics obtained from the measurements show that the proposed antenna is suited for WiMAX application at 2.6GHz.</span>

scholarly journals A new patch antenna for ultra wide band communication applications

2020 ◽  
Vol 18 (2) ◽  
pp. 848
Author(s):  
Anwar Sabah ◽  
Malik Jasim Frhan
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Wide Band ◽  
Dielectric Substrate ◽  
The Other ◽  
Ultra Wide Band ◽  
Uwb Antenna ◽  
Feed Point ◽  
Printed Monopole ◽  
Good Agreement

<span>A printed monopole patch Ultra Wide Band (UWB) antenna for use in UWB application is proposed in this paper. The proposed antenna consists of a patch with appropriate dimensions on one side of a dielectric substrate, and a partial ground plane on the other side of the substrate. The techniques that used to enhance the bandwidth are the partial ground plane, feed point position and adjusted feed gap. The substrate that is used in the proposed antenna is Fr4 epoxy, the optimum dimensions of the antenna are 40mm×28mm×1.5mm this antenna designed by HFSS program. The band achieved by the proposed antenna is from 3.6GHz to 15GHz. This antenna is fabricated in the ministry of science and technology Baghdad-Iraq and a good agreement between simulation and measured S11 is achieved. </span>

scholarly journals Design and Analysis of Metamaterial Unit CellUltra-Wide Band Triangular Antenna for C Band Applications

2019 ◽  
Vol 8 (11) ◽  
pp. 2788-2791
Keyword(s):  
Cell Structure ◽  
Ground Plane ◽  
Wide Band ◽  
Satellite Communications ◽  
Ultra Wideband ◽  
Ring Resonators ◽  
Antenna Performance ◽  
First Case ◽  
Desirable Feature ◽  
And Performance

This works discuss about the design and development of a metamaterial triangular micro strip ultra-wideband antenna for C-Band communication. This study includes design and performance analysis of patch based antenna to serve C- band applications such as satellite communications. In first scenario, simple triangular antenna with normal ground plane has designed and analyzed. And In second scenario, to improve the antenna radiation, ground has altered and replaced with a unit cell structure. To further improve the antenna performance Split Ring Resonators are incorporated along with radiating patch. In these three different scenarios, antenna performance has been improved from first scenario to last scenario, while dimension of antenna got miniaturized, which is most desirable feature. The antenna gain of antenna in three scenarios is 4.96 db, 5.65 db and 6.15 db respectively. Antenna radiates over 6-7 GHz frequency band in first case, whereas in second scenario it radiates from 5.7 – 7.1 GHz and in third scenario antenna radiates at 5.6-7.4GHz band. This antenna can be placed in limited space.

Sub-Surface Microwave Imaging Using Four-Slot Vivaldi Antenna with Improved Directivity

Frequenz ◽  
2017 ◽  
Vol 71 (1-2) ◽  
pp. 19-28 ◽  
Author(s):  
Zubair Akhter ◽  
Pankaj Kumar ◽  
M. Jaleel Akhtar
Keyword(s):  
Return Loss ◽  
Wide Band ◽  
Point Of View ◽  
Ultra Wide Band ◽  
Network Analyzer ◽  
Frequency Range ◽  
Radiation Characteristics ◽  
Rf Components ◽  
Vivaldi Antenna ◽  
Good Agreement

Abstract The conventional tapered slot Vivaldi antenna is well known for its ultra-wide band characteristics with low directivity. To improve the directivity of the conventional Vivaldi antenna, a four-slot Vivaldi antenna (FSVA) is proposed here to operate in the frequency range of 2–11 GHz. For feeding the FSVA, a binomial three-section V-shaped even mode power divider with progressing T-junctions is also designed and tested here, which is then integrated with the antenna. The proposed antenna prototype is designed and fabricated on a 1-mm thick FR-4 substrate (ɛr=4.3, tanδ=0.025), and the return loss and radiation characteristics are investigated in the anechoic environment. The measured result shows a good agreement with the numerical simulation performed using the EM Simulator i. e. CST MWS-2015. It is found that the directivity of FSVA is approximately doubled as compared to that of the conventional Vivaldi antenna having the same dimensions. From the application point of view, the fabricated antenna is used to image various metallic objects hidden inside the sand using a vector network analyzer and associated RF components. The obtained 2D microwave images of the test media successfully show that the hidden objects can effectively be located and detected using the proposed FSVA in conjunction with a simple imaging scheme.

scholarly journals Compact Ultra-Wide Band MIMO Antenna System for Lower 5G Bands

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Haitham AL-Saif ◽  
Muhammad Usman ◽  
Muhammad Tajammal Chughtai ◽  
Jamal Nasir
Keyword(s):  
Mutual Coupling ◽  
Return Loss ◽  
Wide Band ◽  
Antenna System ◽  
Ultra Wide Band ◽  
Center Frequency ◽  
Mimo Antenna ◽  
Total Structure ◽  
Good Agreement ◽  
Array Geometry

This paper presents a novel compact 2 × 2 planar MIMO antenna system with ultra-wide band capability. Antenna system is specifically designed to target lower 5th generation operating bands ranging from 2 GHz to 12 GHz. This band also covers the IEEE 802.11 a/b/g/n/ac. The antenna array geometry has been simulated using CST MWS. The design is extremely miniaturized with total structure size of 13×25×0.254 mm3. The simulated and measured results have been presented. Measured and simulated return loss values for designed antenna are less than −10 dB over the operating band and lowest values of −35 dB and −32.5 dB can been seen at 5.2 GHz and 9.2 GHz, respectively, whereas at the center frequency the return loss is −25.2 dB. The mutual coupling between both elements is less than −20 dB over the transmission bandwidth. Simulated and measured radiation patterns in E and H planes at center frequency show nearly isotropic far fields. The maximum gain is measured as 4.8 dB. Promising results of Envelope Correlation Coefficient and gain diversity of the design have been achieved. Simulated and measured results are found in good agreement. The fractional bandwidth of antenna is measured as 143.2% which satisfies its ultra-wide band response.

scholarly journals Design and Research of Miniaturized Micro Strip Slot with and without Defected Ground Structure

2019 ◽  
Vol 8 (2S11) ◽  
pp. 391-398 ◽  
Keyword(s):  
Microstrip Antenna ◽  
Communication Systems ◽  
Return Loss ◽  
Ground Plane ◽  
Broad Band ◽  
Wide Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Multiband Antennas ◽  
Microstrip Feed

In this paper, a compact microstrip patch has a slot associated with the Defected Ground Structure radiator is presented. Instead of semi-infinite ground plane, the proposed antenna adopts the defected ground plane. The Radiating patch mendacity on the FR-4 substrate which is having dielectric constant of 4.4, thereby provides good bandwidth. This microstrip antenna is designed for wide bandwidth applications in range of 5.5GHz to 7.25GHz. Proposed work introduces a methodology wherein reducing of structure’s increase the bandwidth as well as return loss with defected ground structure (DGS).However since communication systems require small size, broad band and multiband antennas, monopoles have to be ensued for fabricating broad-band and wide-band antennas. In the proposed work investigations are carried out to design a new antenna with broad-band properties. Simulations are carried out via An soft HFSS electromagnetic simulator software- fabricated on FR-4 Substrate and tested with Vector network Analyzer. Measurement and Simulation results obtained prove the applicability of proposed antenna in 5.5GHz to 7.25GHz frequency range with a return loss of -31.3dB and 11.5dB etc. Microstrip feed line technique is used to feed the antenna with 50Ω impedance.

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