Transient Analysis of Microstrip €“ Like Interconnections Guarded by Ground Tracks

Abstract

Abstract-Guarded ground tracks are extensively used in high density routing for mitigation of crosstalk. However, these ground tracks can influence the electrical properties of the interconnect line also. We present a novel analytical model for extraction of line parameters of high-speed interconnect lines guarded by ground tracks. Based on the proposed model, transient response of such interconnect structures is presented. It is seen ground tracks can significantly affect the time-domain response of the interconnect lines. The computed interconnect circuit parameters are compared with finite-difference time-domain simulations. The proposed model can be practically used for time-domain analysis of microstrip lines also. The results obtained would be useful in design of high-speed interconnections for MCM, RF and MIC related applications.

Suppression of Crosstalk Using Serpentine Guard Trace Vias

“…To suppress crosstalk even further, some studies have proposed using a guard trace, which is one extra trace without any signal between two coupling signal traces [11,[14][15][16][17]. As the guard trace acts as a transmission line, it cannot remain at ground potential throughout its entire length [23].…”

“…A guard trace that is left unterminated (i.e., open termination) will experience noise and act as a potential source of noise for the victim [11,17]. Two terminators in the guard trace absorb the noise energy and effectively reduce the crosstalk [17] but increase the cost. Therefore, grounded vias on the guard traces are used instead to reduce crosstalk [18].…”

“…However, because the remaining 30% flux boundary can still negatively affect the signal quality in high-speed, high-density, space-limited, low-voltage PCB designs, the addition of a guard trace that carries no signal has been proposed to reduce the noise induced in a victim by the aggressor and avoid crosstalk [11,[14][15][16][17]. A guard trace that is left unterminated (i.e., open termination) will experience noise and act as a potential source of noise for the victim [11,17]. Two terminators in the guard trace absorb the noise energy and effectively reduce the crosstalk [17] but increase the cost.…”

Periodically Corrugated Transmission Line Design for Crosstalk Reduction

“…누화를 줄이는 방법으로는 인접한 선로 간격에 3 W Rule을 적용하는 방법 [5] , 두 선로 사이에 가드 트레 이스(guard trace)를 배치하는 방법 [6]～ [9] , 두 선로 위 상 속도의 차이를 발생시키는 방법 [10] , 계단(step) 형 태의 전송 선로를 적용하는 방법 [11] 등이 있다. [11] .…”

Electromagnetic Isolation of a Microstrip by Embedding in a Spatially Variant Anisotropic Metamaterial

“…Many solutions have been proposed to reduce coupling and cross talk including via hole fences [6,7], guarded ground tracks [8], step shaped transmission lines [9], and even faraday cages [10]. All of these approaches, however, use metals and can produce even more problems in the framework of a 3D system because the isolation structures themselves occupy space and limit how closely components can be placed.…”