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Author

J Vijayakrishnan

Bio: J Vijayakrishnan is an academic researcher from VIT University. The author has contributed to research in topics: Microstrip & Band-pass filter. The author has an hindex of 2, co-authored 5 publications receiving 7 citations.

Papers
More filters
Proceedings ArticleDOI
26 Mar 2015
TL;DR: A compact size ultra-wide band pass and bandstop filter using composite right/left-handed transmission line loaded with complementary split ring resonators (CSRRs) in planar technology is presented and using resonant type CSRR metamaterial is implemented to convert the dual band to wide band.
Abstract: In this paper, a compact size ultra-wide band pass and bandstop filter using composite right/left-handed (CRLH) transmission line loaded with complementary split ring resonators (CSRRs) in planar technology is presented. The bandpass filter resonating at two resonant frequency band is designed with transmission line loaded with short circuited stub is presented. The using resonant type CSRR metamaterial is implemented to convert the dual band to wide band is shown. Also a comparative study of different types of CSRR metamaterial with their equivalent circuit and their effect on the results is briefly discussed. The total dimension of Compact filter is 9.6×6.5 mm with microstrip line which is above the Roger 3010 substrate gives the passband from 5 GHz to 12 GHz with the return loss of 15dB which is 3GHz improvement in bandwidth comparing with the reference paper. Such small device with wide bandwidth can be easily integrated into the communication systems requiring high data rates.

3 citations

01 Jan 2015
TL;DR: In this paper, the study of different shapes of defected microstrip structure is made with standard 50-ohm transmission line is perturbed with to generate rejection band at S and C-band that is beneficial to higher order harmonic suppression.
Abstract: In this paper the study of different shapes of defected microstrip structure is made with standard 50-ohm transmission line is perturbed with to generate rejection band at S and C-Band that is beneficial to higher order harmonic suppression. A comparison of G shaped, T shaped and Hash shaped Defected microstip structure has been evaluated and a comparative study is made.

2 citations

Proceedings ArticleDOI
26 Mar 2015
TL;DR: This paper presents design of antenna for worldwide interoperability for microwave access and Wireless Local area network and uses inset feed for achieving a good impedance matching with compactness.
Abstract: This paper presents design of antenna for worldwide interoperability for microwave access (2.3–2.4GHz and 2.5–2.69GHz) and Wireless Local area network (2.4–2.484GHz & 5.15 GHz). The proposed design uses inset feed for achieving a good impedance matching with compactness. The fundamental frequency of the design is 2.6 GHz; Implementing defected ground structure provides additional frequency at 5.15 GHz and shifts the fundamental frequency to 2.5GHz. Different lengths of DGS and its effect on antenna performance and resonance frequency are analyzed. High Frequency Structure simulator is used to analyze the design.

1 citations

Proceedings ArticleDOI
02 Apr 2015
TL;DR: The novel technique of developing Chebyshev Dumbbell DGS low pass filters (LPFs) with compensated microstrip line has better rejection bandwidth at the X-band frequency.
Abstract: The novel technique of developing Chebyshev Dumbbell DGS low pass filters (LPFs) is presented in this paper. The ground plane of a standard 50-ohm transmission line is perturbed by Dumbbell called defected ground structure (DGS) to generate ultra-rejection band at X-Band that is beneficial to higher order harmonic suppression. A comparison of Meander shaped, circular complementary split ring resonator (CSRR) and Dumbbell DGS has been evaluated. An improved Chebyshev Dumbbell DGS LPF with compensated microstrip line has better rejection bandwidth at the X-band frequency.

1 citations

Proceedings ArticleDOI
10 Sep 2015
TL;DR: In this article, a modified defected ground structure (DGS) with compensated microstrip line is investigated for band pass filter (BPF) for uplink frequency at X-band.
Abstract: A X-Band microstrip filter for the reduction of size, to improve the rejection in band using modified defected ground structure (DGS) is proposed. Here different types of uniform and non-uniform DGS and its equivalent lumped L-C circuit model are presented for the parametric relationship and the comparison of pass-band in-between the rejection bands. Then an improved defected ground structure (DGS) with compensated microstrip line is investigated for band pass filter (BPF) for the uplink frequency at X-band.

Cited by
More filters
Journal ArticleDOI
01 Jan 2017
TL;DR: In this paper, a triple notched band band pass filter (BPF) is proposed to pass the UWB signals between 3.1 GHz to 10.6 GHz and to eliminate INSAT signal (4.5 GHz) and satellite communication signal (8.0 GHz) by using U-shaped defected microstrip structures in the feed line.
Abstract: This paper presents design, simulation, fabrication and electrical analysis of a triple notched band UWB band pass filter. Short circuit stubs and microstrip line defected structures are used to design a triple notched band UWB filter. The proposed UWB BPF consists of five short circuited stubs of quarter wavelength attached to the feed line. The notched bands are created by introducing three U-shaped defected microstrip structures in the feed line. The proposed structure of the filter is designed, simulated on CST MSW and fabricated using conventional photolithography process. This band pass filter is designed to pass the UWB signals between 3.1 GHz to 10.6 GHz and to eliminate INSAT signal (4.6 GHz), WLAN signal (5.6 GHz) and satellite communication signal (8.0 GHz). The experimental results of this fabricated filter are compared with the simulated results and they are found to be in close agreement to each other. The Electrical equivalent circuit of this triple notched band filter is also presented in this paper and verified mathematically. This filter is compact in size and better in performance. It can be incorporated in UWB communication system to efficiently increase the interference protection from undesired signals. The physical dimension of this filter is about 30x10.5 mm2.

10 citations

Journal ArticleDOI
TL;DR: In this paper, the authors proposed a compact wideband band-stop filter using complementary split ring resonators (CSRRs) as the fundamental element, and the relation between the geometry and resonances of the CSRR were studied analytically along with their field distribution to determine the factors governing coupling between the rings of the SRR.
Abstract: The objective of this work is to achieve a compact wideband band-stop filter using complementary split ring resonators (CSRR) as the fundamental element. The relation between the geometry and resonances of the CSRR were studied analytically along with their field distribution to determine the factors governing coupling between the rings of the CSRR. The effects of the inner-outer ring orientation on resonances of the CSRR has been studied and the resulting properties have been used to design the proposed compact wideband band-stop filter prototype operating with a center frequency of 2.5 GHz and a bandwidth of 1 GHz. The area of the proposed filter is 0.078 λg2 with a fractional bandwidth of 39.76%. This structure has following advantages: more compact, wide bandwidth and occupies less area. The fabricated prototype was tested and the results were promising representing this works potential.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a unit cell metamaterial structure is proposed, which consists of four compact bend triangular resonators (CBTRs) that offer wideband frequency rejection for the WLAN 5 GHz band.
Abstract: The current wireless technology demands wide frequency operation, like WLAN 5 GHz band, which requires 12.75% frequency bandwidth. In this paper, a unit cell metamaterial structure is proposed, which consists of 4 compact bend triangular resonators (CBTRs) that offer wideband frequency rejection. The single negative metamaterial based resonators give band rejection response, but it is generally bandwidth limited. With the proposed unit cell, rejection bandwidth of 16.78% for rejection level of −12 dB is achieved. It can be further increased by increasing the order of unit cells. The proposed unit cell structure is analyzed for the resonant frequency of 5.5 GHz, and the design is suitable for the application where 15% or more rejection band is required.

4 citations