antenna-theory.com Forum Index antenna-theory.com
Antenna Theory
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Search found 7 matches
antenna-theory.com Forum Index
Author Message
  Topic: Frustrated
dbvanhorn

Replies: 8
Views: 18565

PostForum: Questions Related to Antenna Theory   Posted: Fri Sep 11, 2015 2:14 pm   Subject: Frustrated
[quote="helix"]How can you be "not a huge fan" of sims when they get you "pretty close"?!

Somehow, the computer lends an air of infallibility. It's been a problem sin ...
  Topic: Mobile phone Antennas
dbvanhorn

Replies: 2
Views: 6597

PostForum: Questions Related to Antenna Theory   Posted: Wed Aug 05, 2015 3:36 pm   Subject: Mobile phone Antennas
Those miracle stickers are coming back!

I recently saw some for sale, same old thing, stick them to the battery and it magically increases your antenna.

There's one on kickstarter for charging y ...
  Topic: Frequency measurement and antenna selection
dbvanhorn

Replies: 3
Views: 9559

PostForum: Questions Related to Antenna Theory   Posted: Tue Aug 04, 2015 3:34 pm   Subject: Frequency measurement and antenna selection
You might get some useful energy from vibration.. Smile

I had some persistent sales engineers trying to sell me their energy harvesting chip for a military sensor device I was designing. The device d ...
  Topic: Frustrated
dbvanhorn

Replies: 8
Views: 18565

PostForum: Questions Related to Antenna Theory   Posted: Tue Aug 04, 2015 3:29 pm   Subject: Frustrated
I hear ya on sims. I'm not a huge fan, but it does let me get pretty close before I commit to hardware, and the results seem to track pretty well with built hardware.

I can filter out harmonics, b ...
  Topic: Frustrated
dbvanhorn

Replies: 8
Views: 18565

PostForum: Questions Related to Antenna Theory   Posted: Fri Jul 31, 2015 8:33 pm   Subject: Frustrated
So am I right in thinking that the most practical answer to reduce sensitivity to the objects below my device, is to flood the entire bottom layer with copper, and then to use some antenna structure s ...
  Topic: Frustrated
dbvanhorn

Replies: 8
Views: 18565

PostForum: Questions Related to Antenna Theory   Posted: Fri Jul 31, 2015 7:01 pm   Subject: Frustrated
Board size is 96x96mm with large rounded corners.

Experience with this chip is that if the return loss gets worse than 12dB, the harmonics rise fast. We don't have any real data on how fast, but i ...
  Topic: Frustrated
dbvanhorn

Replies: 8
Views: 18565

PostForum: Questions Related to Antenna Theory   Posted: Fri Jul 31, 2015 3:20 pm   Subject: Frustrated
Ah the fun of real life antenna design. No dipoles in vacuum here, messy real world stuff.

Here's my conundrum:

I have a four layer PCB, in plastic enclosure, with about 12mm free above the PCB ...
 
Page 1 of 1
All times are GMT
Jump to:  


Powered by phpBB © 2001, 2005 phpBB Group