Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums Thank you for visiting RF Cafe!

Slotted Waveguide Antenna - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


crash66429
 Post subject: Slotted Wavguide Antenna
Posted: Thu Aug 14, 2008 11:31 am 
 
Lieutenant

Joined: Tue Jul 15, 2008 11:35 am
Posts: 2
I have been tasked with building a slotted waveguide antenna for the X-Band. As this would be my first attempt, I would appreciate any words of wisdom, tips, tricks or material recommendations. So far I plan on slotting the WR90 which will be soldered to a choke flange. That will connect to the cover flange WG to SMA connector. Thanks!


 
   
 
nubbage
 Post subject:
Posted: Fri Aug 15, 2008 6:03 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 218
Location: London UK
Hi crash
I was on a Sperry team designing and building these for marine radar at 9375MHz many years ago. The milling of the edge slots (or as well the broadside slots) is quite critical in order to keep the gain up and the sidelobe level low. Also you need to consider the array illumination function most appropriate for your application. This might be Tchebychev, cosine-on-pedestal etc each of which has a specific beamwidth and sidelobe level characteristic.
I have a few designs ready-done (by others) for 10.3GHz.
What are your design criteria, like operating bandwidth, gain, sidelobe level, polarization etc?
Is this a student project or a commercial product?


 
   
 
crash66429
 Post subject:
Posted: Thu Aug 21, 2008 11:12 am 
 
Lieutenant

Joined: Tue Jul 15, 2008 11:35 am
Posts: 2
I am reverse engineering an existing functional antenna. It was done as a student project at the masters level. The student has moved on and left us with only the physical antenna. It is being use for the testing of a commercial airborne SAR prototype. I need to reproduce the antenna and later possibly make improvements.

The operating BW is 500MHz centered at 9.75GHz. I believe the beamwidth is 30 degrees. The configuration is a linear longitudinal shunt slot array. I do not really have all of the other design parameters at hand. That’s what I have been able to determine so far. Thanks for your input!




Posted  11/12/2012

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
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

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !

height-line