Visit RFCafe.com Thanks for visiting RFCafe.net Thanks for visiting the RF Cafe Archives Thank you for visiting RF Cafe Thank you for visiting the RF Cafe Archives!

11.1m Vertex antenna pattern cuts - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues - primarily having to spend time purging garbage posts from the board. At some point I might start the RF Cafe Forums again if the phpBB software gets better at filtering spam.

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

-- Amateur Radio
-- Anecdotes, Gripes & Humor
-- Antennas
-- CAE, CAD, & Software
-- Circuits & Components
-- Employment & Interviews
-- Miscellany
-- Swap Shop
-- Systems
-- Test & Measurement
-- Webmaster

Koos
 Post subject: 11.1m Vertex antenna pattern cuts
Posted: Thu Feb 25, 2010 9:35 am 
 
Captain

Joined: Wed Sep 30, 2009 2:26 am
Posts: 6
How do I determine if the pattern cuts that I did are withinn specs for this antenna. How do I calculate the sidelobe gain, and is there any mask that I can use.

Thanks


 
   
 
Paul Chriss
 Post subject: Re: 11.1m Vertex antenna pattern cuts
Posted: Fri Feb 26, 2010 12:41 pm 
 
Captain

Joined: Sat Mar 04, 2006 10:12 am
Posts: 11
Are you talking about simulation or actual field measurements? My suggestion would be to contact the antenna manufacturer (or one that makes similar antennas) and ask them for a recommended procedure. They had to make the measurements in an OATS for something that size so you should be able to duplicate their setup without a lot of sophisticated equipment. A calibrate measurement antenna and a spectrum analyzer should let you do reasonable relative power measurements around the antenna field.

Here is a nice collection of satellite system calculators for you. They happened to be posted here on RF Cafe this morning (not by RF Cafe but a link to somebody's website). There's lots of great stuff there.

http://www.satellite-calculations.com/




Posted  11/12/2012
RF Stencils for Visio v3.1 by RF Cafe
RF Cascade Workbook 2018 (GS) - RF Cafe
About RF Cafe Archives
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:  AirplanesAndRockets.com

spacer