Thank you for visiting RF Cafe! 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 RF Cafe Homepage Thank you for visiting RF Cafe!

Antenna Design Question... Please Help - 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

 Post subject: Antenna design question... please help
Posted: Thu Nov 11, 2004 11:47 pm 
Can someone please help me with these questions?

1.Design a pyramidal horn antenna at 5775 MHz to offer a gain of 20 dB. You may assume any appropriate value for the wave guide dimensions.

2.For a gigabit wireless backhaul link ( LOS ), the data rate is 2Gbps. The frequency of operation is 11GHz. Suggest an appropriate antenna and substantiate your choice based on a comparison with other possible antenna structures.

3.Design a matching section ( patch / transmission line ) to match a 50 ohm source to 75 ohm load . You may use any of the freeware available on-line such as “AppCad” or “SMITH ” to do the matching.

 Post subject:
Posted: Fri Nov 12, 2004 9:20 am 
Sounds like a student assignment.

Now, if you were in a fraternity, you could just search the files for last year's solutions from your borthers. Fortunately for you, you're probably not a frat boy, so do yourself an even bigger service and figure these out on your own.

You might be asked something similar on an interview one day and it sure would be nice to know how to come up with the answers on your own.

Good luck - seriously. :)

 Post subject:
Posted: Wed Nov 17, 2004 11:11 am 

Joined: Mon Nov 15, 2004 4:08 pm
Posts: 3
Regarding the third one - try looking it up in Microwave engineering by Pozar, this and many other problems are solved and explained there.

2 - check some we sites of companies that produce antennas and substrats (like Rogers). Simply type "Wi-Fi" in the browser and you should find thousands of solutions.

3. The gain and frequency of a horn antenna depends on the dimensions of the aperture and the lenght of the horn. That should be your start point.

Best wishes and good luck

 Post subject: Antenna Design
Posted: Tue Nov 23, 2004 3:26 pm 
1) 6x8 inch aperture, 12 inches long.
2) Frequency scale the above antenna, or search google
3) incomplete question, no bandwidth, no spec.
Sounds like a homework assignment.

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
Kirt Blattenberger,

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:

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