Novel triangular‐type electromagnetic bandgap structure for ultra‐broadband suppression of simultaneous switching noise

Abstract

in Figure 4, dual bandpass characteristics are obtained at the centre frequencies of 860 and 1810 MHz, which is applicable for personal wireless communication systems. CONCLUSIONSThe nonlinear phase characteristic of the proposed IDGS is analyzed using the equivalent circuit model and experimentally demonstrated. This IDGS is acted as a short-ended dual-band stub circuit with a controllable phase characteristic. The nonlinear phase of the proposed IDGS can be controllable and mainly affected on the DGS width. This IDGS is applicable for multiband operating components. REFERENCES 1. A. Lai, C. Caloz, and T. Itoh, Composite right/left-handed transmission line metamaterials, Microwave Mag 5 (2004), 34 -50. 2. H.-M. Kim and B.-S. Kim, Bandgap and slow/fast-wave characteristics of defected ground structures (DGSs) including left-handed features,ABSTRACT: To build a stable power distribution network for highspeed digital systems, simultaneous switching noise (SSN) in multilayer PCBs and packages needs to be sufficiently suppressed. In this article, a novel triangular-type uniplanar compact electromagnetic band-gap with different bridges designed for power/ground planes is proposed for the ultra-broadband suppression of SSN. The SSN suppression performance of the proposed structure is validated both numerically and experimentally. A Ϫ30 dB suppression bandwidth for SSN is achieved starting at 800 MHz and extending to 15 GHz and beyond, that is, almost the entire noise band.Figure 1 SI/PI and EMI problems generating mechanism due to SSN in the PDN of multilayer structures 1356 ABSTRACT: In this article, resonant characteristics of novel microstrip resonators based on the Sierpinski carpet fractal geometries are proposed in detail.With increasing the iteration order of the Sierpinskibased fractal resonators, the resonant frequency is decreased but the unloaded quality factor is slightly enhanced. The resonant properties are discussed using the RLC equivalent circuit. Additional, the design guide for bandpass filter using the nth order resonator is also developed. Using these fractal resonators, several dual-mode bandpass filters using different order resonators can be designed and fabricated to verify the advantages of the size and insertion loss reduction. It is also found good agreement between the simulation and measurement is achieved.

Comparison of network analysis methods for computing complex propagation coefficients of dispersive transmission lines

“…which is derived from the ABCD matrix of the transmission line. S 11 and S 21 are the complex S-parameters S 11 5jS 11 je ju 11 and S 21 5jS 21 je ju 21 (2) and / 11 and / 21 are the reflection phase and the insertion phase, in radians, measured directly from the VNA with full two-port calibration. L is the physical length between the ports of the transmission line.…”

“…Their capabilities of switching bands, changing communication standards, and handling jammers, among others, make them a very attractive choice for RF frontends [1]. Yet, the flexibility of tunable filters comes at the cost of being potentially vulnerable to variations in terms of frequency drift caused by aging or environmental effects [2]. Also, tuning those filters may become a costly and time-consuming process.…”

“…Dispersion, which can result from resonance in a device's transmission characteristics, can be harnessed in the case of metamaterials , and needs to be modeled, measured, and controlled in the case of high‐speed signal transmission. Highly dispersive transmission lines have been shown to effectively control simultaneous switching noise in high clock speed circuits . Transmission lines with discontinuities are highly dispersive with complex dispersion diagrams that need to be quickly measured with a vector network analyzer (VNA) or modeled with an electromagnetic field simulator.…”

Broadband suppression of simultaneous switch noise (SSN) using Z-Bridge Planar Electromagnetic Bandgap power distribution network for Ultra Wide Band (UWB) application

“…The most common drawback of these methods is the limited frequency bandwidth that they can cover. Recently, a new idea for eliminating the SSN was introduced by using uniplanar compact electromagnetic bandgap (UC-EBG) structures [8] [9][10] [11].…”

“…The improved version of the ZP-EBG is started at approximately 280MHz and extending to 15GHz. Compared with the EBG structure proposed in [8][9][10][11], HFSS simulation and measurement of the magnitude of S21 for the novel ZP-EBG, improve vision ZP-EBG proposed in this paper and for the reference solid power plane…”