In this paper, a comparative performance of microstrip filters loaded with various dumbbellshaped defected ground structures (DB-DGS) has been studied in terms of their bandstop characteristics. During this course, a new dumbbell shaped DGS having transmetal slit in the connecting slot of the square head in the ground plane has been proposed. This proposed design provides an improved bandstop r...

A compact ultra-wide-band (UWB) band-pass filter (BPF) with dual notch bands is presented using novel defected ground structures (DGS). A couple of triangle-ring resonators with four open-stubs fed by a couple of inter-digital coupled structures is developed to meet the UWB requirement of a uniform 3.1GHz to 10.6GHz full-band transmission response. Dual notch bands are generated for filtering o...

New coplanar waveguide (CPW) filters with a forkshaped defected ground structure (DGS) are proposed for radio-frequency (RF) and microwave applications. The miniature CPW DGS filters developed are based on the silicon technology. The filters are able to provide the bandstop characteristics with high attenuation in the stop band and low insertion loss in the pass band. A typical filter designed ...

Due to their smaller size and light weighted structures patch antennas are accustomed in modern communication Technology. With additional size in reduction, micro strip antennas are commonly used in handsets, GPS receivers etc. This paper presents a novel design of fractal shape patch antenna using U-slot on patch and defected ground structure. Due to slots on patch and ground, tri-band resonat...

A novel Defected Ground Structure (DGS) is proposed to miniaturize a 2×2 Modified Corporate Feed Planar Antenna Array (M-CFPA) with modified corporate feeding network. The DGS altered the surface current distribution and shifted resonance frequency lower side. After running parametric sweep of length width patch antenna element, achieved miniaturized array resonating at 2.4 GHz frequency. desig...

In this Letter, a dumbbell-shaped patch loaded slotline(PLS) is proposed. Like the conventional defected ground structure(DGS) for a microstrip line, we show that the proposed PLS can provide a wide bandstop characteristic in some frequency bands with only one or small number of unit cells. Also, the equivalent circuit model for a unit section is derived from the analysis of the field distribut...

In this paper, a novel design of CPW-Fed defected substrate microstrip antenna is presented. The proposed antenna shows wideband applications by choosing suitable defected crown shape substrate. Defected shape substrate also reduces the size of the antenna. The radiating patch of proposed antenna is taken in the form of extended U-shape. The space around the radiator is utilized by extending th...

Xuehui Guan et al. 953 A novel dual-mode bandpass filter (BPF) using a dual spiral-shaped defected ground waveguide (DGW) resonator is proposed in this letter. The dual-mode characteristic of this filter is achieved by loading a defected T-shaped stub at the midline of the spiral-shaped DGW resonator. Also, nonorthogonal input and output feed-lines are adopted in the filter. Based on the compac...