Analysis of Dual Band Response of Slot Loaded Rectangular Microstrip Antenna Using Defected Ground Structure

2019 ◽  
pp. 215-224
Author(s):  
Aarti G. Ambekar ◽  
Amit A. Deshmukh ◽  
K. P. Ray
Keyword(s):  
Microstrip Antenna ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Rectangular Microstrip Antenna

A multilayer dual wideband circularly polarized microstrip antenna with DGS for WLAN/Bluetooth/ZigBee/Wi-Max/ IMT band applications

2015 ◽  
Vol 9 (2) ◽  
pp. 317-325 ◽  
Author(s):  
Amanpreet Kaur ◽  
Rajesh Khanna ◽  
Machavaram Kartikeyan
Keyword(s):  
Dielectric Constant ◽  
Surface Area ◽  
Microstrip Antenna ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Mobile Telecommunications ◽  
Ieee 802.11B ◽  
Ground Structure ◽  
Circularly Polarized ◽  
Feed Network

In this paper, a three layered stacked circularly polarized rectangular dual band microstrip antenna with a defected ground structure (DGS) and a feed network with stub (showing dual wideband characteristic) is designed, fabricated, and tested for WLAN, Zig bee, Wi-Max, and IMT band applications. The proposed antenna is fabricated on an FR4 substrate with dielectric constant (εr) of 4.4; tanδ of 0.0024 and a height of 1.57 mm.The antenna has a surface area of 4.8 × 4.1 cm2and a total height of 5.1 mm. The designed antenna covers two wireless bands from 2.39 to 2.64GHz and 3.39–3.76 GHZ with impedance bandwidths (VSWR < 2) of 250 MHz (9% bandwidth centered at 2.515 GHz) and 370 MHz (10% bandwidth centered at 3.57 GHz), respectively. This antenna is capable of covering IEEE 802.11b/g/n standards of WLAN from 2.4 to 2.485 GHz, bluetooth applications from 2.4 to 2.483 GHz, ZigBee applications from 2.4 to 2.485 GHz, IEEE 802.16/ Wi-MaX applications from 3.4 to 3.69 GHz and international mobile telecommunications (IMT) band from 3.4 to 3.6 GHz. As the antenna is circularly polarized, the misalignment of the receiver with transmitter does not affect the performance of the system. The antenna designing was done using CST MWS V'10 and the prototype of the designed antenna was tested for the validation of S11(dB) and gain results against the simulated ones experimentally. The proposed antenna shows a gain of 4.08 dBi at 2.5 GHz and a gain of 5.024 dBi at 3.51 GHz.

Arc-cornered microstrip antenna with defected ground structure for broad banding and improved cross-polarization suppression over whole skew planes

2015 ◽  
Vol 9 (2) ◽  
pp. 437-446 ◽  
Author(s):  
Subhradeep Chakraborty ◽  
Sudipta Chattopadhyay
Keyword(s):  
Microstrip Antenna ◽  
Dominant Mode ◽  
Impedance Bandwidth ◽  
Cross Polarization ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Rectangular Microstrip Antenna ◽  
Opposite Manner ◽  
Sharp Corners ◽  
Polarized Radiation

Defected ground structure (DGS)-integrated arc-cornered rectangular microstrip antenna (RMA) has been investigated to achieve broadband along with high co-polarized to cross-polarized radiation (CP–XP) isolation over principal as well as over skew planes without affecting the dominant mode co-polarized (CP) radiation pattern. The present arc-cornered RMA on circular and rectangular dot-type DGS is thoroughly studied and compared with the conventional rectangular microstrip antenna. In the present paper, a crucial emphasis is given to improve CP–XP isolation in all the skew planes and by employing circular dot-type DGS around 20 dB CP–XP isolation is achieved over whole skew planes as well as in the H-plane with the proposed structure with 20% impedance bandwidth. On the contrary, the CP–XP isolation and impedance bandwidth vary in opposite manner in case of the rectangular dot-type DGS. Around 25 and 10 dB CP–XP isolation with 9 and 22% impedance bandwidth have been obtained with thin and thick rectangular dot-type DGS, respectively. The corners of the patch surface are rounded in such a way to reduce spurious radiations from the sharp corners, which are generally attributed for high XP radiation along the diagonal directions.

Application of Defected Ground Structure for Augmenting High-Gain Ultra-Wide Bandwidth from Rectangular Microstrip Antenna

2018 ◽  
Vol 38 (2) ◽  
pp. 123-133 ◽  
Author(s):  
Pawar Umesh Ankush ◽  
Subhradeep Chakraborty ◽  
L. Lolit Kumar Singh ◽  
Sudipta Chattopadhyay
Keyword(s):  
Microstrip Antenna ◽  
High Gain ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Wide Bandwidth ◽  
Rectangular Microstrip Antenna
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