An analysis and design of a novel planar antenna in corporation with fractal shaped defected ground structure (DGS) for emergency management has been presented in this paper. The conventional ground plane can be replaced by a Fractal DGS ground plane to get miniaturization and better resonating characteristics. Particle swarm optimization (PSO) has been used to identify the geometrical descript...

Most communication system contains an RF front end which performs signal processing with RF filters. Micro strip filters are a low cost means of doing this. Micro strip filters play various roles in wireless or mobile communication systems. There is an increasing demand for newer microwave and millimetre-wave systems to meet the emerging telecommunication challenges with respect to size, perfor...

A frequency agile triple band microstrip antenna using defected ground structure for WLAN/WiMAX application is presented, in which frequency agility is electronically achieved by changing the bias voltage of varactor diode. A defected ground structure rectangular patch with dual inverted L-shaped fed with a cross shaped strip line is used to achieve multiple bands. Simulated results are validat...

Manuscript Received 26-February-2013 and revised 23-June-2013 ISSN 2322-3936 Accepted on 2July-2013 Abstract— This paper proposes a two way L and S band Gysel power divider/combiner that uses line to ground resistors. Step by step methods to obtain a wide isolation and transmission bandwidth are presented. A design that uses five resistors is selected and optimized based on Quasi Newton method....

This paper presents a compact tunable bandpass filter that is based on open split ring resonator to achieve high out-of-band rejection. Exact equations and design procedures are given based on strict theoretical analysis. By loading the varactor diodes, the center frequency and bandwidth of the bandpass filter could realize reconfigurable. Then defected ground structure was adopted in the input...

In this article, we present a novel application of glide symmetry to differential lines with common-mode (CM) rejection filter properties. Two different topologies are investigated. First, is applied pair where ground-connected mushrooms employed as CM structure. The same idea also used in defective ground structures introduced stop the propagation. It demonstrated that bandwidth drastically in...

In this study the effects of using defected ground structures (DGS) composed a complementary split ring resonator (CSRR) and CSRR with dumbbell (CSRR-D) for rectangular microstrip antennas are investigated. On aim, two different antennas, which Antenna B having etched DGS C CSRR-D designed fabricated in comparison ordinary patch antenna, is A. both Antennas C, same position planes. other hand, ...

A novel design of multiband microstrip antenna array with dumbbell shape defected ground structure (DGS) is presented. The DGS is inserted into the ground plane between the two elements of the antenna array in order to suppress mutual coupling. Both simulation and measurement results verified that the DGS improved the radiation properties of the antenna array. Measurement results of the DGS ant...