Mixer CE | Engee Documentation

Description

Block Mixer CE performs signal frequency conversion and nonlinear amplification.

For a given RF input signal and the LO input signal the mixer multiplies the signals at the input ports:

This mixing converts the frequency of the radio frequency signal into and . In order for the mixer to perform this operation correctly, the frequencies must be switched on or in the simulation frequencies calculated by the block Configuration.

The power gain specification for this unit correlates the power of the single-sideband signal (SSB) with the input signal.

After mixing the RF and LO signals, the mixer unit performs amplification. To simulate linear gain, the mixer scales the signals by a factor of . A Voltage Controlled Voltage Source (VCVS), specified by a polynomial, implements nonlinear amplification. The polynomial automatically turns on saturation and creates additional intermodulation frequencies.

Ports

Conserving

# In+ — RF input signal
electricity

Details

The electrical port connected to the RF input signal.

Program usage name

In+

# In− — RF input signal
electricity

Details

The electrical port connected to the RF input signal.

Program usage name

In-

# LO+ — LO input signal
electricity

Details

The electrical port connected to the input LO signal.

Program usage name

LO+

# LO− — LO input signal
electricity

Details

The electrical port connected to the input LO signal.

Program usage name

LO-

# 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

Main

# Source of conversion gain — parameter of the conversion gain source
Available power gain

Details

The parameter of the conversion gain source, set as

Available power gain — the block uses the parameter value Available power gain, dB to calculate the linear voltage gain the VCVS polynomial. This calculation assumes a consistent load for the mixer.

Values	`Available power gain`
Default value	`Available power gain`
Program usage name	`source_gain`
Tunable	No
Evaluatable	Yes

# Available power gain, dB — linear mixer gain

Details

The linear gain of the mixer, set as a scalar in dB.

Default value	`0.0`
Program usage name	`power_gain_in_db`
Tunable	No
Evaluatable	Yes

# Input impedance, Ohm — mixer input impedance

Details

The input impedance of the mixer, set as a scalar in ohms.

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

# Output impedance, Ohm — mixer output impedance

Details

The output impedance of the mixer, set as a scalar in ohms.

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

# LO impedance, Ohm — impedance at the LO ports of the mixer

Details

The output impedance of the mixer, set as a scalar in ohms.

Default value	`Inf`
Program usage name	`lo_imp`
Tunable	No
Evaluatable	Yes

Nonlinearity

# Nonlinear polynomial type — polynomial nonlinearity
Even and odd order

Details

Polynomial nonlinearity, defined as

Even and odd order — when this value is selected, the amplifier can generate second- and third-order intermodulation frequencies in addition to the linear component.

Values	`Even and odd order`
Default value	`Even and odd order`
Program usage name	`polynomial_type`
Tunable	No
Evaluatable	Yes

# Intercept points convention — the legend of the intersection points
Output | Input

Details

The symbol of the intersection points, defined as Input or Output. Use this specification for intersection points, compression power with gain 1 dB and saturation power.

Values	`Output` \| `Input`
Default value	`Output`
Program usage name	`ip_type`
Tunable	No
Evaluatable	Yes

# IP2, dBm — the intersection point of the second order

Details

The intersection point of the second order, defined as a scalar in dBm. Default value Inf corresponds to an unspecified point.

Default value	`Inf`
Program usage name	`ip2`
Tunable	No
Evaluatable	Yes

# IP3, dBm — the intersection point of the third order

Details

The intersection point of the third order, defined as a scalar in dBm. Default value Inf corresponds to an unspecified point.

Default value	`Inf`
Program usage name	`ip3`
Tunable	No
Evaluatable	Yes

Literature

Razavi, Behzad. RF Microelectronics. Upper Saddle River, NJ: Prentice Hall, 2011.
Pozar, David M. Microwave Engineering, Hoboken NJ: John Wiley & Sons, 2005.