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.

Do SMT component leads have to be the same size as the microstrip?

Status
Not open for further replies.

skatefast08

Full Member level 3
Joined
Jan 24, 2018
Messages
189
Helped
2
Reputation
4
Reaction score
2
Trophy points
18
Activity points
1,779
Do SMT component leads have to be the same width as the transmission line?

Do SMT component leads have to be the same width as the microstrip transmission line at 2.4 GHz?
 
Last edited:

Re: Do SMT component leads have to be the same width as the transmission line?

Do SMT component leads have to be the same width as the microstrip transmission line at 2.4 GHz?

No. There is a discontinuity at the component anyway, because the current flow inside the component is not at the "bottom" of the component, and the component dielectric material is different from erel=1 above your microstrip line.

In many cases, having a physically small component (small in width & length) reduces the parasitics and results in better RF performance.
 

In other words as an example, if you interrupt a straight microstrip line with a 0 ohm resistor having the same width of the line, the performances of the microstrip line (as loss, impedance, and phase) will change, due to reasons mentioned above.
Of course, this influence can be seen better at high microwave frequencies.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top