Design of dual band patch antenna with bandwidth enhancement using complementary defected ground structure

2016 ◽  
Author(s):  
Jogesh Chandra Dash ◽  
Guru Prasad Mishra ◽  
Biswa Binayak Mangaraj
Keyword(s):  
Patch Antenna ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Bandwidth Enhancement

Compact dual-band truncated patch antenna with fractal defected ground structure for wireless applications

2015 ◽  
Vol 9 (1) ◽  
pp. 163-170 ◽  
Author(s):  
B. Rama Sanjeeva Reddy ◽  
D. Vakula
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Bandwidth Enhancement ◽  
Compact Antenna ◽  
Wireless Applications ◽  
Radiation Properties ◽  
Global Positioning

In this paper, a compact, dual-band patch antenna is proposed over Minkowski fractal defected ground structure (DGS) for bandwidth enhancement of global positioning system (GPS) applications. The proposed design combines the truncated dual L-shaped slits cut on diagonal corners of radiating patch and fractal defect on the metallic ground plane. This concept shifts the frequencies to lower bands with improvement in antenna radiation properties. By deploying symmetrical and asymmetrical boundaries to the structure for the fractal DGS on metallic ground plane, improvement in bandwidth and gain are obtained. Compact antenna size is achieved for dual-band GPS frequencies of L1 (1.575 GHz) and L2 (1.227 GHz). The measured results for antenna prototype are (1.2–1.245 GHz): L2 band and (1.51–1.59 GHz): L1 band for 10 dB return loss bandwidth with better pattern radiation. Gain value with and without DGS is observed for compact antenna overall volume of 0.32λ0 × 0.32λ0 × 0.024λ0.

Dual-Band Proximity Coupled Feed Microstrip Patch Antenna with ‘T’ Slot on the Radiating Patch and ‘Dumbbell’ Shaped Defected Ground Structure

2016 ◽  
Vol 3 (2) ◽  
pp. 435 ◽  
Author(s):  
Dawit Fitsum ◽  
Dilip Mali ◽  
Mohammed Ismail
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Rectangular Microstrip Patch Antenna

<p>This paper presents Dual-Band proximity coupled feed rectangular Microstrip patch antenna with slots on the radiating patch and Defected Ground Structure. Initially a simple proximity coupled feed rectangular Microstrip patch antenna resonating at 2.4 GHz is designed. Etching out a ‘Dumbbell’ shaped defect from the ground plane and ‘T’ shaped slot from the radiating patch of the proximity coupled feed rectangular Microstrip patch antenna, results in a Dual-Band operation, i.e., resonating at 2.4 GHz and 4.5 GHz; with 30.3 % and 18.8% reduction in the overall area of the patch and the ground plane of the reference antenna respectively. The proposed antenna resonates in S-band at frequency of 2.4 GHz with bandwidth of 123.6 MHz and C-band at frequency of 4.5 GHz with bandwidth of 200 MHz, and a very good return loss of -22.1818 dB and -19.0839 dB at resonant frequency of 2.4 GHz and 4.5 GHz respectively is obtained. The proposed antenna is useful for different wireless applications in the S-band and C-band.</p>

Bandwidth Enhancement of Rectangular Microstrip Patch Antenna using Defected Ground Structure

2016 ◽  
Vol 3 (2) ◽  
pp. 428 ◽  
Author(s):  
Dawit Fitsum ◽  
Dilip Mali ◽  
Mohammed Ismail
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Microstrip Patch Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Antenna Structure ◽  
Bandwidth Enhancement ◽  
Microstrip Patch ◽  
Rectangular Microstrip Patch Antenna

<p>This paper presents the bandwidth enhancement of a Proximity Coupled Feed Rectangular Microstrip Patch Antenna using a new Defected Ground Structure - an ‘inverted SHA’ shaped slot on the ground plane of the proximity coupled feed rectangular Microstrip patch antenna. The parameters such as Bandwidth, Return loss, VSWR and Radiation efficiency are improved in the proposed antenna than simple proximity coupled feed rectangular Microstrip patch antenna without Defected Ground Structure. A comparison is also shown for the proposed Microstrip patch antenna with the antenna structure without Defected Ground Structure. The proposed antenna resonates in S-band at frequency of 2.4 GHz with bandwidth of 180 MHz. A very good return loss of -47.9223 dB is obtained for the Microstrip patch antenna with an ’inverted SHA’ shaped Defected Ground Structure. Implementing an ‘inverted SHA’ shaped defect in the ground plane of the proximity coupled feed rectangular Microstrip patch antenna results in 5.3% improvement in bandwidth with 16.01% reduction in the overall area of the ground plane as compared to the Microstrip patch antenna without Defected Ground Structure.</p>

scholarly journals Miniaturized Dual-Band Dual-Mode Microstrip Patch Antenna with Defected Ground Structure for Wearable Applications

2021 ◽  
Vol 2 (2) ◽  
Author(s):  
Nur Azura Shamsudin ◽  
◽  
Shaharil Mohd Shah ◽  
Keyword(s):  
Resonant Frequency ◽  
Radiation Pattern ◽  
Human Tissue ◽  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Dual Mode ◽  
Microstrip Patch

This work presents the performance of a miniaturized dual-band dual-mode microstrip patch antenna with Defected Ground Structure (DGS) at 2.45 GHz and 5.8 GHz on the stacked substrate configuration in the order of FR-4 – PDMS- FR-4. The antenna offers a promising solution for wearable applications in the ISM bands. The first substrate is a flexible Flame Retardant 4 (FR-4) and the other substrate is a highly flexible Polydimethyl Siloxane (PDMS). The size of the antenna was reduced from 50 × 50 mm2 to 30 × 30 mm2, by introducing DGS on the ground plane. A single U-slot on the rectangular radiating patch was introduced to produce the upper resonant frequency of 5.8 GHz while the existing square patch is to generate the lower resonant frequency of 2.45 GHz. The simulations on the dual-band dual-mode microstrip patch antenna shows the reflection coefficient, S11 at 2.45 GHz is -17.848 dB with a bandwidth of 278.8 MHz and -13.779 dB with a bandwidth of 273 MHz at 5.8 GHz. A unidirectional radiation pattern observed in the E-plane shows that the antenna could be applied for off-body communication while an omnidirectional radiation pattern in the H-plane showed that the antenna can be used for on-body communication. Bending investigation were performed for the antenna over a vacuum cylinder with varying diameters of 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm and 120 mm in the CST MWS® software. From the graph of reflection coefficients, the performance of the antenna were not affected in bending condition. The SAR simulations showed that the SAR limits obey the guidelines as stipulated by the Federal Communication Commission (FCC) and the International Commission on Non-Ionizing Radiation Protection (ICNIRP) for 1 mW of input power. The 2.45 GHz SAR limit for 1 g of human tissue is 0.09007 W/kg (FCC standard: < 1.6 W/kg) while for 10 g is 0.01867 W/kg (ICNIRP standard: < 2 W/kg). For 5.8 GHz, the SAR limit for 1 g of human tissue is 0.115 W/kg and for 10 g is 0.03517 W/kg. Based on the performance of the antenna in bending condition and the SAR limits, it is safe to conclude that the antenna can be used for wearable applications at 2.45 GHz and 5.8 GHz of the ISM bands.

scholarly journals Parametric Study and Analysis of Microstrip Patch Antenna with Multiple Slit Positions

2020 ◽  
Vol 13 (3) ◽  
pp. 1-4 ◽  
Author(s):  
V. A. Sankar Ponnapalli ◽  
Kaithi Deepthi Reddy ◽  
Shaik Aqeel
Keyword(s):  
Parametric Study ◽  
Patch Antenna ◽  
Communication Systems ◽  
Substrate Material ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Geometrical Parameters ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Microstrip Patch

AbstractParametric study and analysis of microstrip patch antenna with multiple slit positions is presented in this research contribution. This work is aimed to design a microstrip patch antenna, which can able resonate dual-band frequencies (i.e. 3.5 GHz and 5.3 GHz) with a trade-off between the geometrical parameters. The proposed antenna designed using the multiple slits on the patch, RT Duroid 5880 as substrate material, and with a defected ground structure. Owing to the geometrical miniaturization this antenna will be capable to work at sophisticated communication systems where size of the communication system is a desired parameter.

scholarly journals Design and Analysis of Compact Dual Band U-Slot Microstrip Patch Antenna with Defected Ground Structure for Wireless Application

2018 ◽  
Vol 7 (3.1) ◽  
pp. 17
Author(s):  
S Leo Pauline ◽  
T R Ganesh Babu
Keyword(s):  
Patch Antenna ◽  
Periodic Structures ◽  
Ground Plane ◽  
Wide Band ◽  
Dual Band ◽  
Electromagnetic Signal ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Wireless Application ◽  
Application Requirements

This paper explore about   the micro strip patch antenna design with a defected ground structure (DGS) for dual band operation. The intend of this paper is to design an micro strip antenna, under the frequency at 2.4 GHz and 5.2 GHz that can be utilized for BLUETOOTH and WLAN applications. The feeding technique used here is coaxial feed technique. The above said double band property can be established by etching U-slot in the ground plane. Being periodic structure slot is selected and it is imposed on ground plane. The periodic structures naturally modify the method of propagation of the electromagnetic signal passing on to the antenna. Essentially its core is to vary the parasitic capacitance and inductance of the material through which the substrate is made. This may moreover leads to the reduction in size and progress the performance of the antenna. Micro strip patch antennae are favored due to the fact that these are small in size, inexpensive, consume low power and easy to fabricate and also be designed to meet wide band application requirements.  

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