What is double balanced mixer?

The double balanced mixer is a diode bridge mixer that uses two single-ended to differential transformers, or baluns, to create the multiplication of two input frequencies and cancel many of the unwanted harmonics and signals.

What is a single balanced mixer?

A single balanced mixer is arranged with one of its inputs applied to a balanced (differential) circuit so that either the local oscillator (LO) or signal input (RF) is suppressed at the output, but not both.

What is the purpose of the transformer in the diode mixer circuit?

The matching of the transformers and the individual legs are important in determining the balance of the RF mixer. The transformer also plays an important role in determining the conversion loss and drive level of the RF mixer.

What is difference between mixer and modulator?

Mixer is used to transfer frequency from one to another. Modulator means it will modulate the signal with information from one to another.

What are the benefits of using a double balanced mixer over an unbalanced mixer?

Double-balanced Switching Mixers The advantages of a double-balanced design over a single balanced design are increased linearity, improved suppression of spurious products (all even order products of the LO and/or the RF are suppressed) and inherent isolation between all ports.

What is the output in a balanced mixer?

The inputs to the balanced mixer are the received spectrum and a local oscillator. The output of the mixer consists of the sum and differences of the input frequencies.

What is an image reject mixer?

An image rejection mixer is often used to eliminate one sideband from converting to the IF frequency. The typical reason for this is noise figure: image noise from the unwanted sideband can easily pollute the noise figure of your receiver by 3 dB.

What is diode ring mixer?

Operation. The diodes used in the diode ring modulator can either be silicon, silicon Schottky-barrier or gallium-arsenide. They serve as switches that control whether the input signal is passed with or without a 180° phase reversal. The carrier signal is the one that sets the diodes on and off at a high rate of speed.