Attenuator (CE)

The attenuator model for the RF circuit.

blockType: SubSystem

Path in the library:

/RF/Circuit Envelope/Elements/Attenuator (CE)

Description

Block Attenuator (CE) attenuates the signal power by a preset factor, known as _ input loss_ in dB. Usually, the unit adjusts the impedance of the RF circuit at the input and output ports. Attenuators can be used to attenuate the power of the incoming signal in order to protect RF circuits.

The block icon Attenuator (CE) It is dynamic and displays the current state of the applied noise parameter. This table shows how the block icon changes depending on the parameter status. Simulate noise.

The flag Simulate noise installed

The flag Simulate noise not installed

attenuator ce

attenuator ce 1

Ports

Conserving

# In+ — The input signal
electricity

Details

The electrical port connected to the input signal.

Program usage name

In+

# In− — The input signal
electricity

Details

The electrical port connected to the input signal.

Program usage name

In−

# Out+ — The output signal
electricity

Details

The electrical port connected to the output signal.

Program usage name

Out+

# Out− — The output signal
electricity

Details

The electrical port connected to the output signal.

Program usage name

Out−

Parameters

# Attenuation, db — the level of insertion loss or attenuation

Details

The level of insertion loss or attenuation applied to the signal, given as a scalar, in dB.

Default value	`3.0`
Program usage name	`att`
Tunable	No
Evaluatable	Yes

# Input impedance, Ohm — input impedance

Details

The input impedance of the attenuator, given as a scalar, in Ohms.

Default value	`50.0`
Program usage name	`input_imp`
Tunable	No
Evaluatable	Yes

# Output Impedance, Ohm — Output impedance

Details

The output impedance of the attenuator, given as a scalar, in ohms.

Default value	`50.0`
Program usage name	`output_imp`
Tunable	No
Evaluatable	Yes

# Simulate noise — thermal noise simulation

Details

Check this box to simulate thermal noise in the attenuator. Then in the block Configuration (CE) also check the box Simulate noise. Both checkboxes are set By default.

This parameter defines a current noise source with a one-sided power density equal to in A²/Hz, where

— Boltzmann constant;
— parameter value Temperature, K in the block Configuration (CE).

Default value	`true (switched on)`
Program usage name	`simulate_local_noise`
Tunable	No
Evaluatable	Yes