For PCB via, the antipad is the clearance hole between barrel and no-connect metal layer

# SMA launch optimization

Hi Experts,When I do SMA launch optimization, my SMA has characteristic impedance50ohm, but the trac......

asked by zhangjun5960 lastest answer by scott

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votes# Anti Pads in Differential Pairs

Hello Experts,The benefits of antipads in high speed differential pairs signals are known.But I see ......

asked by sergio lastest answer by Chris.Cotton

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votes# 1

answers# the impedance of via

Hi Dear experts,For the same size of vias (10mils) and antipads (40mils), When it connectsto 100ohm ......

asked by zhangjun5960 lastest answer by shlepnev

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votes# 2

answers# 100ohm via model

Hi Experts,I'm designing a 100 ohm via model with 5% tolerance for 15 gbps lane (260mil thick board ......

asked by sureshkumar.ayyavu lastest answer by sureshkumar.ayyavu

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votes# 4

answers# Common mode perfornace of Serdes Channel

Hi ExpertIn the case of optimizing channel IL and RL, most time we only consider the differential mo......

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votes# 1

answers# Optimizing differential vias for high speed serde......

I have been doing some 3D simulations of differential vias usingHyperlynx.3D EM solver. I have found......

asked by joel lastest answer by bertsimonovich

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votes# 3

answers# common antipad

Hi,What is the advantage of using common antipad for the differential via inhigh frequency design?In......

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votes# 2

answers# effects of stitching vias last attempt- without a......

Hello Experts,I would like to start out by saying thank you all for the wealth ofinformation availab......

asked by Matthew.Severini lastest answer by weirsi

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votes# 9

answers# Differential via optimization

Hi,I optimizated a differential via on PCB using 3d EM software. The main goal is to make SDD11 as s......

asked by emcesd lastest answer by istvan.novak

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votes# 7

answers# Via insertion loss

Hi all,I'm trying to find via insertion loss in a RF path that has a antennaconnector on one end, fo......

asked by praveenkumardr lastest answer by jory_mckinley

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votes# 2

answers# SV: Re: Effects of anti-pad diameter on SDD11 for......

Hi Pehr,Normally the return loss should become better at both high and low frequencies when increasi......

asked by peter.siljehov

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answers# VIA STUB and ANTIPAD

Hi All,I have two questions for you all,1) Instead of backdrilling can we reduce the via stub by cha......

asked by pugal8686 lastest answer by istvan.novak

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votes# 3

answers# Package Geometries.

Hello Gurus;Trying to get a general idea of package buildup and geometries. If I imagine a package a......

asked by surita.chandani lastest answer by jory_mckinley

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votes# 6

answers# Antipad dimensions

Hello all,What would you consider to be the most important factors that would have animpact on antip......

asked by karthik.guruchandran lastest answer by bertsimonovich

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votes# 3

answers# Re: [Possible SPAM] BGA Breakout.

Surita,Now lets get to solving your 2 between math problem. I assume at this point you've read and g......

asked by mhumphreys

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votes# 0

answers# 2D vs 3D EM based signal integrity simulators

Hi experts,I would like to ask your opinions about the following:Which one is "better", using 2D or ......

asked by buenos lastest answer by Gert.Havermann

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votes# 16

answers# BGA Breakout.

Hello Gurus;I am doing some preliminary calculations on the breakout ofa 1,400+ Ball , BGA. Roughl......

asked by surita.chandani lastest answer by jory_mckinley

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votes# 33

answers# PCB modelling wizard ?

Hi,I wonder how everyone here creates the model when you try to do a 3D EMsimulation of PCB related ......

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votes# 7

answers# impedance controlled vias

Guys,Is there any good literature on impedance controlled vias? All I could findis the EDN paper by ......

asked by qazi lastest answer by wolfgang.maichen

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votes# 2

answers# Matching within 1 mil is just plain sillyness, IM......

Several points I'd like to make. Even though the software says that there is a 1 mil delta, that do......

asked by scott

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