The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> RF Design >> UWB bandwidth
https://designers-guide.org/forum/YaBB.pl?num=1226974825

Message started by aaron_do on Nov 17^th, 2008, 6:20pm

Title: UWB bandwidth
Post by aaron_do on Nov 17^th, 2008, 6:20pm

Hi all,

just wondering, for a UWB radio, is there any special need to have a flat response (for an LNA for example) over the whole 3-10 GHz bandwidth? My thinking is flat gain (and group delay) is only needed over the channel bandwidth.

thanks,
Aaron

Title: Re: UWB bandwidth
Post by didac on Nov 18^th, 2008, 1:22am

Hi,
It's just a question of topology election(I assume you are talking of MB-UWB with channels of 528MHz): if you made a broadband LNA that covers all the bandwidth you don't need to do band selection in the LNA, if you prefer to use a "narrowband"(not so narrow after all) you will need to made typically input and output tunable inductors(like for example stacking inductors, but stacking could change the properties of the inductors).
Hope it helps,