HMC641ALC4TR RF/IF and RFID

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RF switches regulate and control signal paths to enable integration of different radio frequency (RF) circuits. HMC641ALC4TR is a high linearity SPDT absorptive switch operating from DC to 4 GHz. It has a low insertion loss and is optimized for the mobile infrastructure, gapfiller and satellite receiver operating frequency. This article will discuss the application fields and working principles of HMC641ALC4TR.

Application Field of HMC641ALC4TR

HMC641ALC4TR is an absorptive switch, suitable for applications that require low insertion loss, high linearity, and DC electrical isolation between ports. It is ideal for applications such as cellular and Wi-Fi mobile communication, W-CDMA third-generation systems, LTE fourth-generation systems, GSM base station transceivers, VSAT systems, receiver/transmitters, gapfiller systems, WLANs, amplifiers, mixers, frequency converters and antennas. The switch is in a compact surface mount 4 x 4 mm quad flat package, making it suitable for integration into existing circuit designs. The switch is also very power efficient and can be used in battery powered devices, such as smartphones.

Working Principle of HMC641ALC4TR

The HMC641ALC4TR uses PIN diodes to switch the RF signals from one port to the other. The switch is designed to be low power (it is operated with a single control voltage between 0 and 3 VDC) and is therefore suitable for battery-powered devices. The PIN diodes are biased in the off-state, meaning that it does not pass any RF signals when the control voltage is 0V. When the control voltage is applied, the PIN diode will be biased in its on-state, allowing signals to pass through. In addition, the switch has internal ESD protection to ensure that it is not damaged by electrical overloads caused by static electricity or lightning.

The HMC641ALC4TR is designed so that the on-state insertion loss is minimized while still maintaining a high isolation level between the ports. Additionally, it is designed to have a high linearity, meaning that it will perform without distortion even in applications where the signal swing is large.

Conclusion

The HMC641ALC4TR is a low power, high linearity SPDT absorptive switch suitable for applications ranging from cellular and Wi-Fi communication to VSAT systems and antenna reception. It is capable of passing signals from DC to 4 GHz while maintaining a low insertion loss and high linearity. It is also suitable for integration into existing circuit designs due to its small form factor and has internal ESD protection to prevent damage from static electricity and lightning.

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