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antenna feed points?? - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: antenna feed points??
Posted: Thu Jun 17, 2004 3:51 pm 
 
Captain

Joined: Fri Jun 11, 2004 2:17 pm
Posts: 5
I was measuring atthe feed point on a printed circuit board antenna and the impedance was supposed to be seeing about 200 ohms for 2.4GHz application. But when I measured it was about 20 ohms (this is from a previous engineer here). I am new to antenna and when I measured the antenna without the feed point, it measures about 180 ohms but as stated above, the with the feed point it is 20 ohms, any insight??


 
   
 
 Post subject:
Posted: Fri Jun 18, 2004 11:48 am 
 
Captain
 

Joined: Mon Apr 12, 2004 4:50 pm
Posts: 20
Location: South Florida
What instrument are you measuring the impeadance?

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 Post subject:
Posted: Fri Jun 18, 2004 12:21 pm 
 
Captain

Joined: Fri Jun 11, 2004 2:17 pm
Posts: 5
I was using a agilent VNA. But I am mistated, it was not the feed point, it was a transmission line to the feed point, sorry for the confusion, I am new to some of the terminology,


 
   
 
 Post subject: Antenna design books
Posted: Tue Jun 22, 2004 8:13 am 
Hi:

There are a lot of books out with good information on designing and testing patch (printed circuit) antennas, particularly for data communications. You can look at places like Amazon.com.

Kirt has a good list on RF Cafe where (he claims) the ones listed are 4-star rating or above. Of course, ratings can be slewed by biased reviewers, but in general they are probably pretty reliable.

http://www.rfcafe.com/business/bookstore/antennas.htm

You should check them out. Most are around $120, but get free shipping, and that's a small price to pay for taking the guesswork out of your effort.

Cheers!



Posted  11/12/2012
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