×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

impedance matching of a coaxial cable and a microstrip patch

impedance matching of a coaxial cable and a microstrip patch

impedance matching of a coaxial cable and a microstrip patch

(OP)
how can I make a match between the microstrip patch antenna and the coaxial cable using the HFFS  program
need help plz

RE: impedance matching of a coaxial cable and a microstrip patch

You have to move the location of the coaxial input along the patch center line to match to 50 ohms for a standard half wave (in the dielectric) patch antenna.

If the patch is thin, the coax. needs to be closer to the center of the patch.
 
The thicker patch requires the coax. to be nearer the edge.

Start half way between the center and the edge, then move the coax. and see if it gets better, adjust accordingly.

The coax. has to come from under the ground plane of course.

kchiggins

RE: impedance matching of a coaxial cable and a microstrip patch

(OP)
I am sorry my question is how to fabricate the coaxial cable to feed a microstrip anteena using the HFFS program , any one can help plz

RE: impedance matching of a coaxial cable and a microstrip patch

fabricate means to build something, HFSS means computer analysis. If you are asking how to input this into HFSS, that's;

Center conductor to top patch, outer conductor to patch ground plane. Make sure the length of the input cable is 1/4 wavelength or longer or HFSS gives you erroneous S11. Add a radiation boundary keeping it outside the antenna by ? half wavelength.

HFSS is a complicated beast, lots of errant outputs.
The HFSS latest revisions Rev. 9.5 & 10 added so little to rev 8.5, a friend of mine sold all his stock in Ansoft instantly. Sounds like IE3D and CST Microwave Studio will catch up and pass Ansoft in the coming years. It's still a good program, but it seems the management thinks so much of it that not improving it is adequate.

kch

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close