Learning Forum

[ancan9360]

Hello all,

I have a three question can someone help ? 

 

1) In microstrip lines I use lumped port. But not in the substrate, I use it on the surface of substrate. I work on beam steering so that phase is very important to me. And I did some simulation with these two way excitation and there was two different results in terms of the dB and Angle. Which one is true ? 

 

2) Let's say I have 4 antenna. But I want only one of them active by the time the others should be equal to 50ohm but not with the lumped port. I want only 1 port and the others should be 50ohm terminated. How can I do that ? Should I draw a rectangle then assign lumped RLC - series - 50ohm or is there any different way to do that. I don't want to assign 4 lumped port and go to edit sources because Scattering matrices is become 4x4 and it takes a lot of time to simulate especially for a big structures. 

 

3) When I assign a lumped RLC I have to draw a rectangle right, but does the width or length or thickness of the sheet matter ? 

[Takeshi Itadani]

1) The actual power supply method for the microstrip line must be reproduced in the simulation model. Which is the actual power supply method? Set the one that is closest to the actual power supply method.

 

2) If you do not want to increase the size of the matrix, set Lumped Port only for the antenna you want to activate, and set the Lumped RLC boundary condition to 50Ω for the other three antennas.

 

3) A sheet with a Lumped RLC boundary condition is treated like a conductor, so the length of the sheet will affect parasitic inductance. There will also be parasitic capacitance effects between adjacent parallel conductors.