CSM4T17

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RF mixers are devices that are used in the radio frequency (RF) domain, which are typically used for the generation, reception, or conversion of radio frequency signals. The CSM4T17 is a RF mixer from a portfolio of CSM4T00 series products developed by WZT, and is designed with extremely low local oscillator (LO) leakage, wide spurious free dynamic range (SFDR), high power handling capability, and excellent reverse isolation between ports. In this paper, we discuss the application fields of the CSM4T17 Mixer and its working principle.

Application of CSM4T17 RF Mixer

CSM4T17 RF Mixers are used for a wide variety of applications, ranging from communication and military to test & measurement and medical. The CSM4T17 is designed with a high power handling capability and extremely low LO leakage to ensure a flatter frequency response. This allows it to be used in various applications, such as wireless infrastructure and broadcasting, 4G base station applications, and aerospace & defense. Additionally, its wide spurious free dynamic range (SFDR) and reverse isolation make it a great choice for test & measurement and medical applications.

CSM4T17 RF Mixers are designed with features that reduce non-linear distortion, enabling wider bandwidths and improved signal-to-noise ratios. These mixers are particularly useful for communication applications, such as wireless local area networks (WLANs), cellular radio, and digital television broadcast. Also, its SFDR and reverse isolation make it suitable for medical imaging, spectroscopy, and other sensitive applications requiring high linearity performance.

Working Principle of CSM4T17 RF Mixer

A RF Mixer (also known as a frequency mixer) is a passive nonlinear device that converts signals from one frequency to another. When two signals of different frequencies are mixed together, the result is a pair of output signals at the sum and difference of the two frequencies. The CSM4T17 is a passive diode-based RF mixer, consisting of series and shunt diodes configured to create a four-port network. The RF and LO signals are applied to two ports (ports 1 and 2), and the two modulated signals (sum and difference frequencies) are obtained at the other two ports (ports 3 and 4).

The CSM4T17 mixer are designed with a 50 Ω single-ended input and output impedance and can be operated up to 18 GHz. This mixer uses a triple-balanced diode topology to achieve low conversion loss, high isolation, and a wide dynamic range, which makes it ideal for applications in various communication fields. Additionally, the series and shunt diodes in the mixer are configured using bias control and feedback loops to optimize performance.

The CSM4T17 mixer are designed with a high dynamic range (up to 85 dBc) and low conversion loss (under 6 dB) between the RF (input) and LO (local oscillator) ports. Additionally, it has reverse isolation of 30 dB or higher between the two ports. This significantly reduces the level of undesired LO leakage between the two ports, improving signal quality and accuracy.

Conclusion

The CSM4T17 RF Mixer from WZT is a versatile and highly capable device designed for a variety of applications, including wireless infrastructure and broadcast, communication, medical imaging, spectroscopy, aerospace & defense, and test & measurement. The CSM4T17 is designed with low conversion loss, high isolation and a wide dynamic range, which makes it well-suited for a range of applications. Furthermore, its low LO leakage levels and reverse isolation make it a great choice for sensitive applications.

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