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.

S parameters in HFSS

Status
Not open for further replies.

chenfire

Member level 3
Joined
Aug 18, 2016
Messages
62
Helped
1
Reputation
2
Reaction score
1
Trophy points
8
Activity points
451
hey there,

I built a simulation in hfss, and want to view a graph of S11 vs freq.

The simulation contains two floquet ports (1 and 2).

I can't understnad the meaning of (S(FloquetPort1:1,FloquetPort1:1)?

I would expect to see somthing like S(FloquetPort1:1) which means the wave returnd from port 1.
Why do I see 2 times Floquet Port1:1?
For instance, I can select S( FloquetPort1:1,FloquetPort1:2)). I don't understand its meaning.

thanks a lot picture.png
 

By_Delly

Newbie level 4
Joined
Oct 21, 2016
Messages
5
Helped
1
Reputation
2
Reaction score
1
Trophy points
3
Activity points
29
Hi, I think (S(FloquetPort1:1,FloquetPort1:1) means S11 parameter. That two 1 1 numbers are used for naming the S parameter. If you select S( FloquetPort1:1,FloquetPort1:2)) that will be the S12 parameter. S11 and S12 are different parameters from each other.
 

sv1437

Full Member level 6
Joined
Sep 5, 2008
Messages
350
Helped
103
Reputation
204
Reaction score
99
Trophy points
1,308
Location
US
Activity points
3,110
You have two ports: FloquetPort1 and FloquetPort2 and each port has two modes
So FloquetPort1 - mode 1 ; FloquetPort1 - mode 2 ; FloquetPort2 - mode 1 ; FloquetPort1 - mode 2

" For wave returned from port 1 " - In general, you need to plot S(FloquetPort1,FloquetPort1). But since you have modes present, if you want to look at the reflection coefficient when FloquetPort1 is excited with mode 1, then plot S(FloquetPort1:1,FloquetPort1:1)

The meaning for this parameter is S(FloquetPort1:1,FloquetPort1:2) - You excited FloquetPort1 with mode 2 and measuring mode 1 at the same port

For Transmission S21 or S(FloquetPort2,FloquetPort1) - You need to plot S(FloquetPort2 : 1 ,FloquetPort1: 1) or S(FloquetPort2 : 2 ,FloquetPort1: 2) - Mode number should be the same.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top