A novel wideband circularly-polarized microstrip antenna array based on DGS for wireless power transmission (original) (raw)
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Indonesian Journal of Electrical Engineering and Computer Science
This paper provides a new conception for a microstrip patch antenna array that operates in a circularly polarized manner for wireless power transmission (WPT) at 2.45 GHz. The proposed conception combines four pentagonal patches and the defected ground structure (DGS) method. The antenna array with a dielectric constant of 4.4 and a tangential loss of 0.025 is printed on a FR4 where its thickness is about 1.58 mm. The developed design aims to optimize the antenna array performance. Th e main contribution, to the telecommunications and WPT fields, is to achieve a maximum energy transfer with low losses, while also ensuring adequate adaptation to the excitation port. To prove the effectiveness of this design, simulation results were obtai ned using computer simulation technology microwave studio (CST MWS) software and validated by another solver high - frequency structure simulator (HFSS). Simulation results are presented and compared with those obtained using existing conceptions in ...
In this paper, a design of a microstrip circular patch antenna with Defected Ground Structure (DGS) is presented for a wireless communication application. The proposed antenna has been simulated at 2.45GHz frequency by using a Computer Simulation Tool (CST) Design Environment software. A substrate of Frame Retardant 4 (FR-4) type is applied with parameters of dielectric constant, εr = 4.7 and the thickness, h = 0.8mm. A copper with a thickness of 0.035mm is used as a patch and ground. The DGS with various sizes and shapes are build at the below of the circular patch. The resultant antenna with DGS and without DGS was analyzed in terms of return loss, bandwidth, gain, Voltage Standing Wave Ratio (VSWR), and radiation pattern. The fabricated antenna was then measured by a Vector Network Analyzer (VNA) to produce its S 11 and VSWR result. The results from simulation and measurement are compared.
IEEE Antennas and Wireless Propagation Letters, 2009
Application of defected ground structure (DGS) to suppress cross-polarized (XP) radiation from a microstrip patch antenna has been reinvestigated using a new DGS geometry for much improved characteristics. Arc-shaped defect has been used in pair, symmetrically located under a circular patch. A number of optimization parameters have been examined using simulated results, leading to a design indicating improved XP behavior. A set of identical prototypes, with and without DGS, have been experimentally studied. The presence of the DGS shows as much as 30 dB isolation of the XP level from its peak radiation, and that compared to an identical patch without DGS indicates an improvement by as much as 12 dB. The relative suppression in XP values are found to be around 7-12 dB over 75 elevation around the boresight of the patch.
Radioengineering, 2019
A new approach based on the incorporation of Zshaped defected ground structure (DGS) in microstrip antenna (MSA) for improving impedance matching and cross polarization (XP) performances is proposed in this paper. Through detail analysis of the surface current densities, and input impedance, the proposed DGS is integrated into a rectangular MSA (RMSA) to realize flat relative XP reduction of 22 dB in the H-plane around broadside angular range of ±60°. Further, an equivalent circuit model (ECM) for the proposed antenna is introduced by considering the mutual coupling in between the DGS and patch and the model is verified using circuit-system-EM cosimulation software, Advanced Design System (ADS). A prototype has been fabricated and tested for the validation of simulated results and it shows good agreement with each other. The antenna operates over 2.32-2.58 GHz with good far-field radiation characteristics and a peak gain of 2.8 dBi at the resonating frequency 2.4 GHz. Hence, the proposed design can be useful for the IEEE 802.11b applications.
A Novel Wide Band Microstrip-Line-Fed Antenna with Defected Ground for CP Operation
Progress In Electromagnetics Research C, 2015
A novel wide band microstrip line-fed antenna with defected ground structure is proposed for circularly polarized characteristics. This antenna is suitable for C-band and partially X-band operation. Antenna1 structure consists of microstrip-line-feed, and the square-shaped slot defect is incorporated in the ground plane. Furthermore, rectangular and circular patches are embedded in the square-shaped slot that improves the performance of the radiating Antenna2 and Antenna3 structures, respectively. The proposed Antenna3 is compact in size and shows a good quality of polarization at resonant frequency band. Antenna3 shows the measured impedance bandwidth of 40.72% (6.45-9.75 GHz) and also shows the variations of 3-dB axial ratio bandwidth at the 6.806 GHz and 9.13 GHz frequencies with the simulated results, respectively. The return loss, axial ratio, gain, efficiency and radiation pattern of the proposed Antenna3 remain consistent for resonant frequency band. The antenna is practically fabricated and simulated. Measured result shows a good agreement with simulated and theoretical ones.
IJERT-Analysis and Design of Microstrip Patch Antenna with Defected Ground Structure
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/analysis-and-design-of-microstrip-patch-antenna-with-defected-ground-structure https://www.ijert.org/research/analysis-and-design-of-microstrip-patch-antenna-with-defected-ground-structure-IJERTV3IS060888.pdf An analysis of resonant behavior of a microstrip patch antenna with defected ground structure (DGS) has been presented in this paper. It is observed that a size reduction of 56.68% has been achieved by taking out an 'I' shape slot from both the patch and the ground plane. As a result, this new antenna, exhibits multiband behavior and better resonant characteristics than its original structure. The proposed antenna not only has characteristics of good radiation, but also has an advantage of low cost and small size for S-band, C-band and X-band wireless applications.
E3S Web of Conferences
An innovative design of a circular polarization antenna for wireless power transmission is described. The suggested antenna is simply constructed, which consists of a square radiating patch having a slotted center with feeding via a probe and an L-shaped ground plane. The application of this L-shaped ground allows a short connection of the probe power supply to the square patch while retaining a certain elevation from the ground plane to the square patch while using an air layer substrate, thereby allows a proper adaptation of the impedance and an improvement of the bandwidth. The purpose of utilizing the slot in the center of the square patch is to create a circular polarization with an axial ratio value of under 3dB. By means of a through-hole through the vertical L-shaped ground plane, the patch radiating can be readily excited with a probe feed pointing into the same plane as the patch. This approach allows to further improve the bandwidth of the circular polarization. In this w...
International Journal of Electrical and Computer Engineering (IJECE), 2017
Microwave engineers have been known to designedly created defects in the shape of carved out patterns on the ground plane of microstrip circuits and transmission lines for a long time, although their implementations to the antennas are comparatively new. The term Defected Ground Structure (DGS), precisely means a single or finite number of defects. At the beginning, DGS was employed underneath printed feed lines to suppress higher harmonics. Then DGS was directly integrated with antennas to improve the radiation characteristics, gain and to suppress mutual coupling between adjacent elements. Since then, the DGS techniques have been explored extensively and have led to many possible applications in the communication industry. The objective of this paper is to design and investigate microstrip patch antenna that operates at 2.4 GHz for Wireless Local Area Network WLAN IEEE 802.11b/g/n, ,Zigbee, Wireless HART, Bluetooth and several proprietary technologies that operate in the 2.4 GHz b...
A CPW fed Circular Microstrip Patch Antenna with Defected Ground Structure
This paper reports the gain enhancement over a wide band (12 GHz – 15 GHz) in a CPW fed circular microstrip patch antenna with circular defected ground structure (DGS). Two compact microstrip antennas have been designed and fabricated with and without defected ground structure (DGS) of same volume 18 mm x 20 mm x 1.6 mm, built over FR4-epoxy substrate. Gain enhancement has been achieved by optimizing the current distribution with suitable DGS. Structural designs have been optimized by parametric simulations in HFSS and CST MWS. Both the antennas can perform well in variety of wireless communication including WLAN IEEE 802.11 g/a and X- band applications including short range, tracking, radar communication which ranges roughly from 8.29 GHz to 11.4 GHz. The performance of both antennas is compared in terms of reflection coefficient, radiation characteristics and gain. The antenna with DGS offers impedance bandwidth of 100% with gain improvement by 2.7 dB for 13 GHz and 7 dB for 14 GHz.
A single feed compact rectangular micro strip patch antenna (MSA) for triple band application is presented in this paper. The proposed antenna has Circular slot on the patch and dumble shaped defected ground structure (DGS). To make the proposed antenna more efficient the optimization of the antenna design parameters have been done using HFSS's optometric. For the proposed antenna three resonant frequencies have been obtained at 2.33GHz, 7.60GHz and 8.53GHz with Bandwidth of 102Mz,130MHz and 127MHz return loss of -15.80db ,-18.77db and -36.57db respectively. The characteristics of the designed structure are investigated by using FEM based electromagnetic solver, HFSS. An extensive analysis of the return loss, gain and bandwidth of the proposed antenna is presented. The simple configuration and low profile nature of the proposed antenna leads to easy fabrication and make it suitable for the application in wireless communication systems. Mainly it is developed to operate in the WLAN, WiMAX & RADAR application.