Re: [SI-LIST] : Other materials for GHz application

ed_crean@smtplink.spectrian.com
Tue, 02 Dec 97 08:44:49 -0800

FR4 Can be used at 700 MHZ all day long for controlled impedance
applications. I use FR4 to design RF circuits for cellular band (900 MHz)
applications. FR4's limitations prop up when designing circuits that
require a high stability dielectric constant. For example, RF couplers.

Ed Crean

______________________________ Reply Separator _________________________________
Subject: [SI-LIST] : Other materials for GHz application
Author: <csoolan@dso.org.sg> at SMTP
Date: 12/2/97 2:55 PM

Hello,

Does anyone have information on the following:

1. Why and What is the limitation of using FR4 up to 500-700 MHz?

2. Beyond this clock freq, what should be recommended for the PCB and why?

3. Under what circumstances, we should migrate MCM and why?

Thanks in advance.

Best Regards.
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Cheah Soo Lan
DSO NATIONAL LAB.
20 SCIENCE PARK DRIVE
SINGAPORE 118 230

EMAIL: csoolan@dso.org.sg