A compact high gain microstrip antenna for wireless applications (original) (raw)
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Design of slotted ground hexagonal microstrip patch antenna and gain improve-ment with fss screen
2013
Three hexagonal patch antennas are designed for circular polarization and experimentally validated. These antennas are labeled; simple hexagonal patch, hexagonal patch with slotted ground and hexagonal patch with parasitic element. The measured impedance bandwidths of the three antennas are 2% for the simple patch, 5.2% for the patch with slotted ground and 6.35% for the antenna with parasitic element. The axial ratio (measured) obtained is 4.73% for the patch with slotted ground and 3.33% for the hexagonal patch antenna with parasitic element. The measured radiation patterns of these antennas are found to be in good agreement with the simulated radiation patterns. The average gain of all the three antennas is also evaluated. A frequency selective surface (FSS) is proposed with dimensions smaller than that of a conventional FSS structure. The measured gain improvement with the proposed FSS is around 3 dB in the operating band.
Modified Triangular Patch Microstrip Antenna with Enhanced Radiation Properties
2011
This research presents a hexagonal shape Defected Ground Structure (DGS) implemented on two- element triangular patch microstrip antenna array. The radiation performance of the antenna is characterized by varying the geometry and dimension of the DGS and also by locating the DGS at specific position, which were simulated. Simulation and measurement results have verified that the antenna with DGS had improved the antenna without DGS. Measurement results of the hexagonal DGS have axial ratio bandwidth enhancement of 10 MHz, return loss improvement of 35%, mutual coupling reduction of 3 dB and gain enhancement of 1 dB.
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.
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.
Progress in Electromagnetics Research M, 2008
This paper presents a hexagonal shape defected ground structure (DGS) implemented on two element triangular patch microstrip antenna array. The radiation performance of the antenna is characterized by varying the geometry and dimension of the DGS and also by locating the DGS at specific position which were simulated. Simulation and measurement results have verified that the antenna with DGS had improved the antenna without DGS. Measurement results of the hexagonal DGS have axial ratio bandwidth enhancement of 10 MHz, return loss improvement of 35%, mutual coupling reduction of 3 dB and gain enhancement of 1 dB.
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...
Microstrip Patch Antenna with Defected Ground Structure for Bandwidth Enhancement
International journal of computer applications, 2013
In this paper, a new Defected Ground Structure (DGS) consisting of I-shape slot in ground has been presented to enhance the bandwidth of the Microstrip Patch Antenna (MPA). The parameters such as Bandwidth, Return loss and VSWR are much improved in proposed antenna than simple MPA without defected ground structure. Finite Element Machine (FEM) based High Frequency Structure Simulator (HFSS) software Version-13.0 is used to obtain the performance parameters of the proposed antenna. A comparison is also shown for the proposed antenna with the antenna structure without defect. The proposed antenna resonates in C-band at frequency of 6.0718 GHz with bandwidth of 132.3 MHz. A very good return loss of-46.75 dB is obtained for I-Shaped Defected Ground Structure (DGS). Also I-shaped DGS in the ground plane found to give a size reduction of about 5%.
DUAL BAND COMPACT MICROSTRIP PATCH ANTENNA WITH DEFECTED GROUND STRUCTURE
In this paper, a compact dual band rectangular microstrip patch antenna is proposed with the defects integrated in metallic ground plane. Initially a regular rectangular shape patch antenna is designed which resonates at 5.2 GHz. With the introduction of DGS in the metallic ground plane, the microstrip antenna is found to be resonant at 3.5 GHz and 5.2 GHz simultaneously, suitable for WiMAX and WLAN application. Thus the proposed antenna behaves as a compact as well as dual frequency band operated antenna. The antenna was fabricated with the RT-Duriod substrate with dielectric constant of 2.2 and height of 0.762mm. This technique is validated experimentally and measured results were in good agreement with simulated results.
Microstrip X-band Antenna with Improvement in Performance Using DGS
Electrical and Electronic Engineering, 2014
Simple and new microstrip patch (MSP) antenna for dual operation in X-band using Defective Ground Structure (DGS) is proposed here. DGS structure is used for improving the performance of microstrip patch antenna. By using four rectangular slots in patch we achieved two frequency bands one (9.24-9.68GHz) and other band (11.63-11.87GHz) both are in X-band. And for improving parameter like return loss, bandwidth, gain and directivity of MSP antenna one rectangular slot is cut in ground plane. The proposed antenna is compact in size with dimension 10 x 10 x 1 mm 3 with the ground plane. For designing and fabrication of this structure FR-4 substrate of thickness 1 mm with Dielectric constant 4.9 is used. The parameters of proposed antenna like return loss; Voltage Standing Wave Ratio (VSWR), radiation pattern; gain and directivity are simulated and analyzed using commercial computer simulation technology microwave studio (CST MWS). A good agreement between simulated and measured results is obtained. The designed antenna structure is very simple, compact and occupies less space all these qualities make this antenna suitable for practical applications. The main application of proposed antenna is to make compatible with radiolocation, radio navigation and fixed satellite applications in X-band (8-12GHz).
Efficiency enhancement of microstrip patch antenna with defected ground structure
2008
Defected ground structures (DGS) have been developed to improve characteristics of many microwave devices. Although the DGS has advantages in the area of the microwave filter design, microstrip antenna design for different applications such as cross polarization reduction and mutual coupling reduction etc., it can also be used for the antenna size reduction. The etching of a defect in the ground plane is a unique technique for the antenna size reduction. The DGS is easy to be an equivalent LC resonator circuit. The value of the inductance and capacitance depends on the area and size of the defect. By varying the various dimensions of the defect, the desired resonance frequency can be achieved. In this paper the effect of dumbbell shaped DGS, to the size reduction of a microstrip patch antenna is investigated. Then a cavity backed structure is used to increase the efficiency of the microstrip patch antenna, in which the electric walls are placed surrounding the patch. The simulation is carried out with IE3D full wave EM simulator.