SA58641DK,118 RF/IF and RFID

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RF Mixers

SA58641DK,118 application field and working principle

A RF mixer is a three-port device that can be used to convert a signal from one frequency to another. It is widely used in radio frequency (RF) systems to manipulate signals—including frequency conversion of a modulated signal, combining signals, mixing signals and/or separating signals. Mixers are used in a range of applications such as communications, radar, and test instrumentation.

The SA58641DK,118 is a high-performance, double-balanced mixer designed for a wide range of applications in the frequency range from 0.1 GHz to 18.0 GHz. The double-balanced architecture provides superior low noise and high linearity performance, making it ideal for cellular infrastructure, military radar, and microwave point-to-point links. The device features a low insertioin loss of 3.5 dB and a good harmonic rejection of -22 dBc.

Working principle: To understand how RF mixers work, we must first understand the concept of modulation. Modulation is the process of taking a signal of one frequency (the input signal) and combining it with another frequency (the local oscillator) to produce a new signal with a different frequency (the output signal). In this way, an RF mixer can be used to “translate” an input signal to the output signal.

RF mixers operate by using two external components: an input signal and a local oscillator signal. The two signals are combined and sent to a diode, which produces an output signal with a frequency equal to the difference between the two input signals. In the case of the SA58641DK,118, the local oscillator is 18 GHz, and the input signal can be in the range of 0.1 GHz to 18 GHz. Thus, the mixer can “translate” the input signal to the frequency of the local oscillator.

The SA58641DK,118 is a high-performance RF mixer that offers a wide range of features and applications. It can be used for frequency conversion of a modulated signal, combining signals, mixing signals and/or separating signals. It has a low insertion loss and a good harmonic rejection, making it suitable for a variety of applications.

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