This paper presents the design of 6dB directional coupler in C-band. A defected ground structure is used underneath the coupled region in order to relax the requirement for a narrow slot between the coupled lines. The simulated results show that the designed coupler exhibits a coupling of 6±0.1dB across the band 4.0 GHz to 4.5 GHz, when the spacing between the coupled lines is larger than 0.1 m...

A novel compact microstrip lowpass filter (LPF) is proposed in this paper, which consists of the complementary rectangle split ring defected microstrip structure (CRSR-DMS), open stubs, spurline and the dumbbell-shaped defected ground structure (DGS). Due to the unique response of the presented CRSR-DMS, a low passband insertion loss and a sharp transition of the proposed LPF was achieved. Mean...

This paper <span>discusses the design of a monopole antenna with various types defected ground structures (DGS) for ultra-wideband (UWB) applications. The DGSs are designed and acted as layer antenna. bandwidth each is then compared without existence DGS. Conventional has 88.6% operates in frequency range 3.1 to 8 GHz. According simulation results, V-shaped DGS was highest, which at 133.3...

This paper presents design of a defected ground structure coupled miniaturized dual-mode bandpass filter realized using a square patch. Two slots orthogonal to each other are cut on the patch to increase the path length of the fundamental mode while keeping the second mode current path almost unaffected. An inclined aperture cut on the ground plane right beneath the center of the patch is used ...

This paper propose a new generation of antenna that applies Metamaterial properties at ground Plane. Paper also analyzed the performance of Microstrip Patch Antenna with and without using the Metamaterial structure. The works mainly include Metamaterial as Defected ground plane. All antenna parameters such as Return Loss, Gain, VSWR and Band width were measured. The main focus of this paper was...