Sorry for the delay in responding I do appreciate the responses. I am looking at a number of very space constrained designs, each with different PCB layouts and different packaging. Over the years I had come to appreciate tuning for resonance then matching impedance. I am aware though that techniques that work at lower frequencies may not express so well at higher ones. FWIW, I am using XFdtd to take enclosures modeled in Solidworks and NX(.step), and pull those together with PCBs modeled in Altium (ODBii) and evaluate the effects of the entire PCB on itself, and the enclosure including other metallic elements not on the PCB. Very compute intensive, the sim I'm running at the moment isn't highly detailed, and it will take a total of about 16 hours to execute using my Nvidia Titan card. The whole chain works pretty nicely, other than the gridding and meshing in XF which is a bit hard to get used to. One other thing I will pass on, is a great smith chart calculator that I found on the web, JJSmith. Very easy to use and very intuitive. I did get to an inverted F antenna on one design that has about 16dB return loss and is nicely resonant at 2.4-2.5 GHz. So far I have only modeled it on Rogers 4350, and I want to try it ASAP on the extremes of FR-4 to see if the cost buys enough to be worth it. I have several more to do once I have this one dialed in. On Sun, Jun 1, 2014 at 7:47 PM, Harold Hallikainen wrote: > > > ...an avid contra dancer... > > > > Alright Harold! Who knew... > > Well, slightly off topic, but here's our local dance info... > > Harold > > -- > FCC Rules Updated Daily at http://www.hallikainen.com - Advertising > opportunities available! > Not sent from an iPhone. > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .