scholarly journals A Research on Microstrip Ultrawide Band Filters using Defected Ground Structure Techniques

2019 ◽  
Vol 8 (10) ◽  
pp. 2147-2153
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Ground Plane ◽  
Vital Role ◽  
Ultra Wideband ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Microstrip Filters ◽  
Low Pass ◽  
Defected Ground Structures

In this paper, microstrip ultra-wideband (UWB) filters using various defected ground structures are studied. Miniature microstrip filters employed in transceiver of modern wireless communication systems play vital role in controlling and regulating frequency response. DGS techniques are etched in ground plane to design compact microstrip based low pass, high pass, bandpass and band reject filters used in modern wireless systems. Various modified and hybrid defected ground structure techniques are employed to achieve high return loss, low insertion loss, ultra compactness, good selectivity and linearity in filters. Study reveals that the proper selection and incorporation of DGS techniques while designing microstrip ultra wideband filter optimizes the various vital parameters which enhances its performance and practicability for various modern wireless communication applications.

scholarly journals Parasitic Strip Loaded Dual Band Notch Circular Monopole Antenna with Defected Ground Structure

2016 ◽  
Vol 6 (4) ◽  
pp. 1742
Author(s):  
P Syam Sundar ◽  
Sarat K Kotamraju ◽  
B T P Madhav ◽  
M Sreehari ◽  
K Raghavendra Rao ◽  
...  
Keyword(s):  
Ground Plane ◽  
Substrate Material ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Basic Model ◽  
Radiating Element ◽  
Monopole Antennas ◽  
Defected Ground Structures ◽  
Similar Kind

In this article a parasitic strip loaded monopole antennas are designed to notch dual and triple bands. The designed models are constructed on one side of the substrate material and on the other end defected ground structures are implemented. The basic antenna comprises a tuning stub and a ground plane with tapered shape slot as DGS. Another model is constructed with circular monopole radiating element on front side and similar kind of ground structure used in the basic rectangular tuning stub antenna. To create notched bands with tuning stubs, two symmetrical parasitic slits are placed inside the slot of the ground plane. The basic model is of the rectangular stub notching triple band and the circular tuning stub antenna notching dual band. Dual band notched circular tuning stub antenna is prototyped on FR4 substrate and measured results from vector network analyzer are compared with simulation results of HFSS for validation.

scholarly journals Investigation on Microstrip Filters with CSRR Defected Ground Structure

2016 ◽  
Vol 5 (2) ◽  
pp. 28
Author(s):  
A. Kumar ◽  
R. Patel ◽  
M. V. Kartikeyan
Keyword(s):  
Split Ring Resonator ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Design Studies ◽  
Complementary Split Ring Resonator ◽  
Microstrip Filters ◽  
Low Pass ◽  
Bandstop Filters ◽  
High Rejection

This paper consists the design studies of complementary split ring resonator (CSRR) defected ground structure (DGS) microstrip filter with low insertion loss in the passband and high rejection in stopband with a comparison of various CSRR-DGS structure has been proposed. Various parameters of microstrip filters have been studied with CSRR-DGS such as roll off rate, bandwidth, effective inductance and capacitance. On the basis of these studies, microstrip low-pass, bandpass and dual-band bandstop filters have been designed and realized with enhanced properties of filters.

scholarly journals Design and Research of Miniaturized Micro Strip Slot with and without Defected Ground Structure

2019 ◽  
Vol 8 (2S11) ◽  
pp. 391-398 ◽  
Keyword(s):  
Microstrip Antenna ◽  
Communication Systems ◽  
Return Loss ◽  
Ground Plane ◽  
Broad Band ◽  
Wide Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Multiband Antennas ◽  
Microstrip Feed

In this paper, a compact microstrip patch has a slot associated with the Defected Ground Structure radiator is presented. Instead of semi-infinite ground plane, the proposed antenna adopts the defected ground plane. The Radiating patch mendacity on the FR-4 substrate which is having dielectric constant of 4.4, thereby provides good bandwidth. This microstrip antenna is designed for wide bandwidth applications in range of 5.5GHz to 7.25GHz. Proposed work introduces a methodology wherein reducing of structure’s increase the bandwidth as well as return loss with defected ground structure (DGS).However since communication systems require small size, broad band and multiband antennas, monopoles have to be ensued for fabricating broad-band and wide-band antennas. In the proposed work investigations are carried out to design a new antenna with broad-band properties. Simulations are carried out via An soft HFSS electromagnetic simulator software- fabricated on FR-4 Substrate and tested with Vector network Analyzer. Measurement and Simulation results obtained prove the applicability of proposed antenna in 5.5GHz to 7.25GHz frequency range with a return loss of -31.3dB and 11.5dB etc. Microstrip feed line technique is used to feed the antenna with 50Ω impedance.

An X-shaped fractal antenna with DGS for multiband applications

2016 ◽  
Vol 9 (5) ◽  
pp. 1075-1083 ◽  
Author(s):  
Ankush Gupta ◽  
Hem Dutt Joshi ◽  
Rajesh Khanna
Keyword(s):  
Communication Systems ◽  
Ground Plane ◽  
Line Length ◽  
Size Reduction ◽  
Impedance Bandwidth ◽  
Network Analyzer ◽  
Fractal Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Ieee 802.11A

In this paper, an X-shaped fractal antenna with defected ground structure (DGS) is presented for multiband and wideband applications. The X shape is used due to its simple design and DGS is utilized to achieve size reduction with multiband and wideband features in the frequency range of 1–7 GHz. The proposed structure is fabricated on FR4 substrate with 1.6 mm thickness. We have proposed two different antennas both are having X-shaped fractal patch with a slotted ground plane to have more impedance bandwidth and better return loss. Various parameters like scale factor, width of ground plane, number of slots with their dimensions and feed line length are optimized to have size reduction and for enhancing the performance of antenna. Reflection coefficient shows the multiband and wideband features of proposed antenna. One of the proposed antennas covers various applications like IEEE802.11y at 3.65 and 4.9 GHz, IEEE 802.11a at 5.4 GHz, 802.11P at 5.9 GHz. Other antenna covers applications like IEEE802.16 at 3.5 GHz; 5 cm band for amateur radio and satellite and future 5 G communication systems over 6 GHz. The antenna designing was done using CST software and simulation results were compared with experimental results (using E5071C network analyzer).

Reconfigurable microstrip slot antenna with DGS for UWB applications

2017 ◽  
Vol 9 (7) ◽  
pp. 1517-1522 ◽  
Author(s):  
Mehri Borhani Kakhki ◽  
Pejman Rezaei
Keyword(s):  
Simple Structure ◽  
Ground Plane ◽  
Local Area ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Antenna Structure ◽  
Rectangular Slot ◽  
Uwb Applications

In this paper, a frequency reconfigurable microstrip slot antenna for ultra-wideband applications with switchable band-notch functions is designed and manufactured. To generate a wide usable fractional bandwidth of 3 to over 13.6 GHz, square patch transforms to a fork-shaped patch, also two triangular-shaped strips have been added at above sections of rectangular slot on the ground plane. Band rejections are obtained by adding two inverted L-shaped strips in the fork-shaped patch and one L-shaped defected ground structure. Moreover, by implementation of two PIN diodes within the antenna structure, four switchable frequency responses are achieved. The designed antenna has simple structure and a small size of 20 × 20 × 0.8 mm3 while providing band rejection characteristics at WiMAX (Worldwide Interoperability for Microwave Access) and WLAN (Wireless Local Area Networks) systems.

scholarly journals Design of Compact MIMO Antenna for 5G Mobile Terminal

2020 ◽  
Vol 9 (3) ◽  
pp. 202-207
Keyword(s):  
Wireless Communication ◽  
Ground Plane ◽  
Research Work ◽  
Mobile Terminal ◽  
Frequency Range ◽  
Defected Ground Structure ◽  
Electronic Components ◽  
Ground Structure ◽  
Mimo Antenna ◽  
Compact Size

This report gives the research work carried out for design and analysis of MIMO antenna using two identical Microstrip slot radiators having enhanced isolation. The slot radiators offer compact size in order to accommodate other electronic components for reduction of volume of the wireless communication system. The defected ground structure is formed on the ground plane in between the antenna elements and feed lines to improve the isolation between them. The substrate used for constructing the antenna is FR-4 having the measurements of 26mm x 22mm x 0.8mm and it has the relative permittivity of 4.4. The printed microfilm strip etched on the opposite side of the substratum is used to couple the signal to each antenna. The HFSS software is used in this paper for designing the antenna and for checking the performance of the antenna. The -10dB bandwidth is 1.1GHz in the frequency range of 3.1 GHZ to 4.2GHz. The maximum isolation obtained after simulation is -23.1dB at 3.13GHz. The maximum gain of 2.26dB is obtained. Simulated radiation diagram of the designed antenna indicates that it is a good radiator for 5G applications in the sub 6GHz frequency band.

scholarly journals Frequency Reconfigurable Antenna Array Using Defected Ground Structure for Outdoor Wireless Communication Systems

2019 ◽  
Vol 9 (1) ◽  
pp. 33
Author(s):  
Mohd Aziz Aris ◽  
Mohd Tarmizi Ali ◽  
Nurulhuda Abd Rahman ◽  
Idnin Pasya Ibrahim
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Array Antenna ◽  
Wireless Communication Systems ◽  
Reconfigurable Antenna ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Resonant Frequencies ◽  
Frequency Reconfigurable Antenna ◽  
Good Agreement

This paper proposes frequency reconfigurable antenna for outdoor wireless communication systems, the 4 x 4 array antenna has designed at two resonant frequencies 7.5 GHz and 8.85 GHz. The periodic dumbbell geometry etched on the ground layer newly proposed with dual functionality, to control desired frequency and to couple radiating patches at the top substrate with feeding line at the bottom substrate. The reconfigurability of the patch antenna is controlled by utilizing the copper pad of the feeding network with OPEN and SHORT states. The reconfigurable antenna has been simulated and optimized using Computer Simulation Technology (CST) to get the desired responds. The good agreement between simulation and measured results indicates that the frequency reconfigurable patch array antenna using Periodic Dumbbell Slotted Aperture Structure (FRPDSA) is feasible to support outdoor wireless communication systems.

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