Design of a Microstrip-Fed Printed-Slot Antenna Using Defected Ground Structures for Multiband Applications (original) (raw)
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Analysis of Slotted Microstrip Antenna with Partial Substrate Removal and Defected Ground Structure
2016
This article presents the design and analysis of a slotted microstrip antenna on defected ground structure. The proposed antenna consisting of defected ground structure at lower part and defected substrate on the upper part of the design. Parametric analysis with change in dimensional characteristics of the antenna is done using HFSS tool to optimize the antenna model for prototyping. The antenna performance is analyzed with respect to the reflection coefficient, bandwidth, radiation pattern and current distribution and presented in this work. The proposed antenna is resonating at dual band and meeting the requirements of the communication systems with considerable gain in L, S and C-Band.
Microstrip V Slot Patch Antenna Using An H –Slot Defected Ground Structure (DGS
This paper presents the Microstrip patch antenna for WLAN applications with planar geometry and it consists of a defected ground (DGS), a feed, a substrate, and a patch. The design with DGS has been analyzed taking different dimensions of H Slot and achieve optimized dimensions with the help of CST, Microwave Studio commercial software for WLAN band at 5.20 GHz frequency with corresponding bandwidth of 310 MHz to optimize antenna's properties. Results show that the final designed antenna has favorable characteristics at this frequency. General Terms: Microstrip Antenna. DGS, WLAN, CST.
A Printed Antenna Design with Defected Ground Structure for Multiband Applications
European Journal of Science and Technology, 2021
In this paper, the design and analysis of a printed antenna based on a defected ground structure for multiband applications is introduced. The proposed antenna consists of two rectangular slots like an inverted stair. Different five strip lengths are in the area of an inverted stair slot. Four strips are equal in width and horizontally located inside the main two rectangular slots. The fifth strip is the smallest one in the middle of the structure in the ground plane. The microstrip line exists only on the front side plane and parallel to the fifth strip. The antenna is printed on a hydrocarbon ceramic substrate with a dielectric constant of 3.55 and a size (40 × 45 × 1.524) mm 3. The proposed antenna is designed by using an electromagnetic simulator based on the finite element method. To verify the suggested approach, the multiband antenna is fabricated and tested. The simulation and measurement results indicate that the antenna has good input-impedance bandwidths (S11 ≤ −10 dB) that extend in the range of 2 to 14 GHz. The six operating frequencies are (2.58, 6.03, 6.25, 7.89, 11.64, and 12.24) GHz. This antenna has good gains and high efficiencies at all resonance frequencies.
This paper proposes a design of multiband Double I-shape slot microstrip patch antenna with dumbbell shape DGS (Defected Ground Structure). The antenna structure comprises double I-shape slotted antenna with Dumbbell shape DGS for wireless applications. The antenna is designed by using FR-4 epoxy (Fire Retardent-4) as a substrate and obtained the multiband results at 2.45 GHz, 3.58 GHz and 5.50 GHz. This antenna structure is further modified by incorporating parasitic elements parallel at the radiating edge of patch. This modified antenna is resonated at four frequencies at 2.45 GHz, 3.60 GHz, 4.68 GHz and 5.50 GHz respectively and analyzed for the antenna parameter like VSWR, antenna gain, bandwidth and radiation pattern. HFSS simulation software has been used for designing and simulation of the proposed antenna. HFSS software is used for simulating microwave passive components.
This paper proposes a design of multiband Double I-shape slot microstrip patch antenna with dumbbell shape DGS (Defected Ground Structure). The antenna structure comprises double I-shape slotted antenna with Dumbbell shape DGS for wireless applications. The antenna is designed by using FR-4 epoxy (Fire Retardent-4) as a substrate and obtained the multiband results at 2.45 GHz, 3.58 GHz, and 5.50 GHz. This antenna structure is further modified by incorporating parasitic elements parallel to the radiating edge of the patch. This modified antenna is resonated at four frequencies at 2.45 GHz, 3.60 GHz, 4.68 GHz and 5.50 GHz respectively and analyzed for the antenna parameter like VSWR, antenna gain, bandwidth, and radiation pattern. HFSS simulation software has been used for designing and simulation of the proposed antenna. HFSS software is used for simulating microwave passive components.
Design of DGS slot microstrip patch antenna
This paper presents an accurate design analysis of three configurations of microstrip feed antenna . My first design is a simple patch antenna and the last two designs employs the rectangular slotted ground plane which works as defected ground plane structure. The area of slots is kept small in designs to avoid excessive radiation beneath the ground. The substrate used for the design purpose is fr4 epoxy of value 4.4. Ansoft HFSS tool is used for result analysis of all the three designs. Firstly a simple design is presented without slot which is accurately designed at 5 GHz. Second design is with a single slot this resonates at 4.8 GHz and third design is with two slots this resonates at 4.85 GHz thus proving a slight frequency shift without much affecting the gain of antenna. IEEE 802.11 is a set of standards for implementing wireless local area network (WLAN) computer communication in the 2.4, 3.6 and 5 GHz frequency bands. Therefore 5 GHz designed patch antenna is applicable for WLAN which can implemented for Wi-Fi applications. The results for Gain, Radiation pattern and return loss are presented in the report.
A multiband microstrip patch antenna with defected ground structure for its applications
Microwave and Optical Technology Letters, 2016
In this letter, a new design of SWB antenna by cutting out double U-slots on the radiating patch with inverted double U-slot on the ground plane is introduced in order to produce broad operating bandwidth without altered the optimized size of antenna. A triangular slit is inserted on the ground plane to minimize the size of ground plane. Therefore, reduce the ground plane effects. The effects of those concepts of slot and slit towards performance of antenna are clarified for both simulation and experimental methods. The proposed antenna is a potential candidate for SWB application as it yields super wideband bandwidth from 2.43 GHz to 32.93 GHz.
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...
Variations of Compact Rectangular Microstrip Antennas Using Defected Ground Plane Structure
Journal of Microwaves, Optoelectronics and Electromagnetic Applications
The defects in the form of slots have been employed in microstrip antenna either on the patch or the ground plane to yield frequency reduction. However, the reported work does not provide any comparative study that highlight upon the frequency and crosspolar level reduction achieved using these various shape slot/defects. This paper provides a thorough comparative study for different compact variations of microstrip antennas obtained using various shape slots on the ground plane. Amongst all, the optimum results are obtained for the bowtie-shaped slot on the ground plane, which offers cross-polar level reduction by 30 dB with a frequency reduction of 21%. The study also reveals that the slot on the ground plane offers better results against the slot on the patch in terms of frequency and cross-polar reduction. This kind of comparative study is not available in the literature and thus this is the novelty in the present work. An empirical formulation for the resonant length at the fundamental mode frequency for different shapes of slot/defect is proposed. The frequency calculated using them closely matches with those obtained using the simulation.
BANDWIDTH ENHANCEMENT OF RECTANGULAR MICROSTRIP ANTENNA USING SLOTS AND DEFECTIVE GROUND STRUCTURE
This paper presents the simulation investigations carried out for enhancing the bandwidth of Rectangular Microstrip Antenna by using slots and defective ground structure. By incorporating two I-type slots on the conventional patch, the antenna resonates for single band with a bandwidth of 3.522%. Adding four I-type slots on the patch the bandwidth is enhanced to 3.613%. Further by incorporating defective ground structures (DGS) in the ground plane of conventional microstrip antenna, the bandwidth has been enhanced from 4.964% to 7.461%. The Glass-Epoxy with relative permittivity í µí¼ í µí± = 4.2 is used as substrate material. The proposed antenna may find applications in the communication systems operating at C-band (4GHz-8GHz). Design concept of the proposed antennas is described and their simulation results are discussed. HFSS software is used for the simulation.