Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Comments on Low loss impedance matching without a transformer

Parent

Low loss impedance matching without a transformer

+2
−0

I have a signal at 10 MHz produced from a 50 Ω source. How can I match that to a 300 Ω load with low losses without using an RF transformer (space constraints)? Are there any circuits and formulas that can help me achieve this?

History
Why does this post require moderator attention?
You might want to add some details to your flag.
Why should this post be closed?

0 comment threads

Post
+0
−0

As an alternative to doing the math, as detailed in Andy's answer, you can use a graphical aid called a Smith chart:

Image alt text

These were used routinely before computers to match transmitters to antennas. The math behind them is what Andy described. See the Wikipedia page for details, which is where the image above was copied from.

History
Why does this post require moderator attention?
You might want to add some details to your flag.

1 comment thread

General comments (6 comments)
General comments
Andy aka‭ wrote almost 4 years ago · edited almost 4 years ago

@Olin your image is not showing. I am going to add more sections to this answer so it might be that your answer "what Andy described" might not hit the mark in terms of the fullness of what I hope to complete!

Olin Lathrop‭ wrote almost 4 years ago

@Andy: Strange. I see it in my browser. I'm using Edge on Win 10, and also just tested it with IE on Win 10. Both showed the image correctly. What browser and OS are you using?

Andy aka‭ wrote almost 4 years ago · edited almost 4 years ago

@Olin I'm using google chrome and I still can't see it - bug alert!!!

manassehkatz‭ wrote almost 4 years ago

And I can't see it Firefox on Android

Skipping 1 deleted comment.

Olin Lathrop‭ wrote almost 4 years ago

@Andy: See the main meta question https://meta.codidact.com/questions/276272 and let them know which images you see.

Olin Lathrop‭ wrote almost 4 years ago

@Andy: I changed the TIFF image to JPEG. Can you see it now?