Defected Ground Structure toward Cross Polarization Reduction of Microstrip Patch Antenna with Improved Impedance Matching (original) (raw)
Related papers
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.
Design and Improvement of Microstrip Patch Antenna Parameters Using Defected Ground Structure
In this paper simple RMPA is designed and its performance parameters are compared with RMPA having defected ground plane. The antenna is simulated at 2.4 GHz using CAD-FEKO simulation software .This work mainly includes modification of antenna ground plane called as Defected Ground Structure (DGS). The parameters of antenna such as Reflection coefficient, Gain, VSWR and Band width, with and without DGS are measured. The main focus of this paper is to improve band width so that patch antenna is used for wide band applications and study effect of DGS on antenna parameters.
International journal of electrical & electronics research, 2024
In this paper a comprehensive comparative study of three distinct microstrip patch antenna (MPA) designs, each optimized for the sub-6 GHz applications, is presented. The initial design phase utilized a Rogers RT 5880 substrate with a permittivity (εr1) of 2.2 and a thickness(H1) of 1.42 mm. The proposed model achieved a resonance band ranging from 4.8 to 7 GHz, with a bandwidth of 2.2 GHz and a return loss (S11) of-20 dB. Subsequent enhancements involved integrating a Barium Strontium Titanate (BST) thin film (εr2 = 250, thickness(H2) = 0.005 mm), effectively shifting the operational band to 3.5-5.3 GHz. The final design iteration, which incorporated both BST and a Defective Ground Structure (DGS), represented a substantial advancement, achieving wideband operation from 1.8 to 6 GHz, expanding the bandwidth to 4.2 GHz, and improving the S11 to-25 dB. This integration also resulted in a compact antenna size of 30 x 26.5 x 1.42 mm³. These findings underscore the synergistic impact of BST and DGS in enhancing MPA design, marking a significant progression in antenna technology, vital for a range of wireless communication.
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...
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.
Microstrip Patch Antenna With Defected Ground Structure for Cross Polarization Suppression
IEEE Antennas and Wireless Propagation Letters, 2005
A defected ground structure (DGS) is proposed to reduce the cross-polarized (XP) radiation of a microstrip patch antenna. The proposed DGS pattern is simple and easy to etch on a commercial microstrip substrate. This will only reduce the XP radiation field without affecting the dominant mode input impedance and co-polarized radiation patterns of a conventional antenna. The new concept has been examined and verified experimentally for a particular DGS pattern employing a circular patch as the radiator. Both simulation and experimental results are presented. Index Terms-Circular microstrip antenna, defected ground structure (DGS), low cross polarization, microstrip antenna.
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.
Journal of Electromagnetic Waves and Applications, 2017
A simple cross type defected ground structure (CDGS) integrated rectangular microstrip antenna (RMA) has been proposed to achieve broad bandwidth along with augmented (improved) co-polarized to cross-polarized radiation (CP-XP) isolation over principal and diagonal planes. In this design, a crucial emphasis is given for concurrent improvement of both bandwidth and polarization purity of microstrip antenna without hampering dominant mode fields. Around 25-28 dB CP-XP isolation is achieved over wide elevation angle with the proposed structure with 25% impedance bandwidth. The simulated and measured results show a close resemblance with each other. The proposed geometry is very simple, easy to fabricate and therefore helps in effortlessness manufacturing process. Therefore, the present structure appears to be ideal in numerous applications where polarization purity is the key issue over the wide bandwidth.
2014
In this paper, we present a novel planar rectangular microstrip-fed patch antenna for 2.4 GHz and 5.5 GHz. This configuration radiates at 2.43GHZ (2.27‐2.55 GHz) and 5.52 GHz (5.14‐5.90 GHz) for 2.4, 5.2 and 5.8GHz WLAN bands adopting IEEE 802.11b, IEEE 802.11e and IEEE 802.11a WLAN standards, respectively. The proposed antenna is designed and simulated using CST Microwave Studio 2012 electromagnetic solver based on Finite Integration Technique. The antenna utilizes an H‐shaped defected ground structure (HSDGS) cell on the ground plane which has a triangular cut on one side for dual-band properties. The effect of different dimensions of HSDGS on return loss is also studied. The condensed size, low cost, ease of fabrication, large bandwidth and excellent radiation parameters in comparison with earlier reported designs are the advantages of the proposed antenna. Further the simulated parameters like gain, bandwidth, VSWR, and return loss are in good conformity with ISM (Industrial Sci...
2014
In this paper, we present a novel planar rectangular microstrip-fed patch antenna for 2.4 GHz and 5.5 GHz. This configuration radiates at 2.43GHZ (2.27‐2.55 GHz) and 5.52 GHz (5.14‐5.90 GHz) for 2.4, 5.2 and 5.8GHz WLAN bands adopting IEEE 802.11b, IEEE 802.11e and IEEE 802.11a WLAN standards, respectively. The proposed antenna is designed and simulated using CST Microwave Studio 2012 electromagnetic solver based on Finite Integration Technique. The antenna utilizes an H‐shaped defected ground structure (HSDGS) cell on the ground plane which has a triangular cut on one side for dualband properties. The effect of different dimensions of HSDGS on return loss is also studied. The condensed size, low cost, ease of fabrication, large bandwidth and excellent radiation parameters in comparison with earlier reported designs are the advantages of the proposed antenna. Further the simulated parameters like gain, bandwidth, VSWR, and return loss are in good conformity with ISM (Industrial Scie...