A novel wide band-gap structure for improved signal integrity

Abstract

In this paper, a simple and novel electromagnetic band gap (EBG) structure is proposed which offers a wide band gap and improved signal integrity. The unit cell of the structure consists of three square patches arranged in a particular fashion and connected by L-shaped bridges. Two of the square patches are shorted to the ground plane using vias. The unit-cell dimensions were taken to be less than half the operating wavelength at 2 and 2.5 GHz, at which the structure has been analyzed for signal integrity. A single unit cell of the proposed EBG structure is analyzed using IE3D, a method of moments based simulation tool. A single unit cell provides a band gap of 20 GHz starting from 10 MHz to 20 GHz. The prototype model for the unit cell is developed. A comparison between the simulation and measured results shows a good agreement. The improved signal integrity of the proposed structure is demonstrated both in terms of S-parameters and the eye diagram.

Genetic Algorithm Optimized X-Band Absorber Using Metamaterials

“…Metamaterials [1] are artificially engineered materials and have several unusual electromagnetic properties that are not found in ordinary materials such as negative refractive index, and artificial magnetism. They have myriad applications [2][3][4], and one of them is the design of Xband absorbers or radar absorbing material [5,6]. Several X-band absorbers have been proposed in the literature [7][8][9][10][11][12][13][14][15][16] that can be broadly classified into two categories: polarization dependent absorbers [7,8] and polarization independent absorbers [9][10][11][12][13][14][15][16].…”

Genetic Algorithm Optimized Electromagnetic Band Gap Structure for Wide Band Noise Suppression

“…In [11] a wide band EBG with a band gap of 40 GHz was presented; however, analysis of SI was not dealt with. Recently, in [12] a single cell wide band gap structure has been proposed and analyzed for its SI. The structure had three patches, two of which are shorted to the ground plane using vias.…”

“…The band gap characteristics can be depicted from dispersion diagram, reflection phase or transmission characteristics. The transmission characteristics are sufficient to determine the suppression band characteristics [8][9][10][11][12]. Exact details of the band gap characteristics can be obtained from dispersion diagram analysis.…”

“…Generally, 4-5 unit cells are needed to provide good isolation characteristics [15], which increase the physical size of the EBG structure. In this paper, a single cell EBG [12] structure is proposed that offers an isolation of 30 dB for 20 GHz bandwidth and an isolation of 40 dB for 17.4 GHz bandwidth. The structure is also analyzed for its Signal Integrity.…”