# Questions tagged [scattering]

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### Direct ABCD matrix calculation from incident and reflected currents and voltages (i.e. obtained by 2 port FDTD simulation results)

Usual method for transmission (ABCD) matrix construction, from 2 ports EM simulation results, is to first calculate S parameters for each port i.e.: ...
169 views

### Antenna impedance (one port network), represented as ABCD (transfer) matrix?

I guess that ABCD matrices are not intended for one port, but, in this case, for the purpose of cascading two networks, 2 port (impedance transformer) and 1 port (antenna), by ABCD matrix ...
30 views

### Calculation of scattering parameter

I am not able to calculate the scattering matrix of a pi-circuit although I have calculated its Y matrix. The needed scattering matrix is referred to 50Ω. Could someone help me on calculating the ...
75 views

### Do scattering parameters change with velocity?

I'm using the HFSS SBR+ solution type. I have one PEC sphere and two parametric beam antennas. I am trying to find out how much S parameters change with the Doppler effect. Configuration: ...
• 208
39 views

### Avoiding thermal noise to enter low temperature while not using dissipative element

Let's assume that we want to interact with a circuit at very low temperature $T2$ to avoid any source of noise. The voltage interacting with this circuit must have a specific target value $V0$. ...
• 167
98 views

### Scattering matrix in microwave amplifier

What exactly is the scattering matrix in a microwave amplifier. I tried to deduce from lectures what it is used for in a microwave amplifier, but all I found were the formulas corresponding to the ...
• 41
40 views

### Is RF propagation path loss symmetrical and independent of clutter location?

Scenario: Consider two measurement points, point one is about 3m above ground level within a cluster of buildings (such as within an office park), and point two is about 1km away with an elevation ...
982 views

### How is Wilkinson power divider lossy?

In an ideal Wilkinson power divider(because in practical there will always be resistive loss), the scattering parameters, or S matrix is given as: From the condition that checks if network is loss-...