Comments on: Draper Fellow http://www.garum.net/blog/2006/03/22/draper-fellow/ and his minions Thu, 16 Apr 2009 02:28:30 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: gva http://www.garum.net/blog/2006/03/22/draper-fellow/comment-page-1/#comment-11 gva Thu, 23 Mar 2006 07:17:44 +0000 http://www.garum.net/blog/2006/03/22/draper-fellow/#comment-11 The reason why they had to use the transmission line structures in the Class E is because the GaAs FETs they're using have non-linear parasitic capacitances, which apparently means second harmonics get all over the place. Although Doug did mention they were using a Class F at lower frequencies... Austin? Probably summer of 2007. No clue. I'm definitely not going for my Ph.D., so it's whenever I get done with my M.Eng. Although I'm not sure where exactly in the country I want to be yet... The reason why they had to use the transmission line structures in the Class E is because the GaAs FETs they’re using have non-linear parasitic capacitances, which apparently means second harmonics get all over the place. Although Doug did mention they were using a Class F at lower frequencies…

Austin? Probably summer of 2007. No clue. I’m definitely not going for my Ph.D., so it’s whenever I get done with my M.Eng. Although I’m not sure where exactly in the country I want to be yet…

]]> By: rsw http://www.garum.net/blog/2006/03/22/draper-fellow/comment-page-1/#comment-9 rsw Thu, 23 Mar 2006 07:04:54 +0000 http://www.garum.net/blog/2006/03/22/draper-fellow/#comment-9 Hot! my thesis was on class E stuff too. Those crazy Sokal brothers... LMK if you want pointers towards books. Also, Dave Perreault knows everything there is to know about class E, and then some, as does Juan Rivas (the Ph. D. student I worked with). A nit to pick: usually if you're using transmission lines in the way you've described it's class F; generally class E just has one resonance. Oh, yeah, if you're actually doing class F, get Guilleman's book, Synthesis of Passive Networks (or something along those lines... I'll look it up when I get to my office tomorrow). Also, when are you available to move to Austin? -rsw Hot! my thesis was on class E stuff too. Those crazy Sokal brothers…

LMK if you want pointers towards books. Also, Dave Perreault knows everything there is to know about class E, and then some, as does Juan Rivas (the Ph. D. student I worked with).

A nit to pick: usually if you’re using transmission lines in the way you’ve described it’s class F; generally class E just has one resonance.

Oh, yeah, if you’re actually doing class F, get Guilleman’s book, Synthesis of Passive Networks (or something along those lines… I’ll look it up when I get to my office tomorrow).

Also, when are you available to move to Austin?

-rsw

]]> By: gva http://www.garum.net/blog/2006/03/22/draper-fellow/comment-page-1/#comment-8 gva Wed, 22 Mar 2006 23:08:20 +0000 http://www.garum.net/blog/2006/03/22/draper-fellow/#comment-8 Thanks dude. Thanks dude.

]]> By: JW Holloway http://www.garum.net/blog/2006/03/22/draper-fellow/comment-page-1/#comment-5 JW Holloway Wed, 22 Mar 2006 11:34:24 +0000 http://www.garum.net/blog/2006/03/22/draper-fellow/#comment-5 Congrats on the grad school deal. -JW Congrats on the grad school deal.

-JW

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