Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Single-Stub Impedance Matching

Status
Not open for further replies.
I

imranshoaib

Junior Member level 2
Joined
Nov 23, 2007
Messages
20
Helped
3
Reputation
4
Reaction score
1
Trophy points
1,283
Activity points
1,428
Hi,

I'm little confused with the stub position in stub tuning process. Let's say we have been given to match a load using single-stub whether short or open. I did both as an exercise and where I got myself stuck was the position of the stub. The query is: whatever the stub is? whether short or open, the stub position is not going to change; only length vary while switching from short to open or open to short stub.

Thanks in anticipation!
 

Funny question, a had never really thought of that.
But yes, you're right, the only parameter that counts is the length of the stub, regardless of its own load (0 or inf).
The distance from the stub to the load depends only of the circuit load itself.
 

Hi,

You should use the shorter stub length of the two possibilities although they seem to be equivalent.

For an example, if short stub gives the required matching impedance, theoretically, you can add quarterwave length to the line and leave it open, it will be the same but only on one frequency. In other words, the bandwidth of this open stub matching will be narrower compared to the shorted stub.

flyhigh
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top