HMC363 RF/IF and RFID

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HMC363 is a high-performance wideband active mixer from Analog Devices that combines a GaAs MESFET input stage with an integrated LO buffer and output buffer amplifiers. This active mixer is carefully matched to achieve conversion gains of better than 15 dB and typical conversion gains of better than 18 dB. It is suitable for a wide range of applications such as wireless communication systems, base stations, test instruments, and wireless infrastructure applications.

The main features of the HMC363 are its ability to handle very high input power levels and wide dynamic range. It has a voltage-controlled distortion (VCD) control, and it is designed to provide excellent third-order harmonic distortion and low intermodulation distortion. Its excellent performance is further bolstered by a low noise figure and low power consumption.

The HMC363 is designed to work in conjunction with other RF ICs and modules. It can be used as a part of design chains, combining with other mixers, amplifiers, filters, and in some cases active antennas. It also has applications in RF baseband systems, where it is used as a VCD control component in order to minimize overall system distortion.

The HMC363 is available in a small, low profile, RoHS compliant package. Its higher power handling capability combined with low distortion and noise figure makes it an ideal choice for space-constrained designs. It also has a wide operating temperature range, excellent phase stability, and an integrated LO buffer. All of these features make the HMC363 an ideal choice for a wide range of applications.

The working principle of the HMC363 is based on the concept of using a nonlinear device in combination with appropriate bias voltages and resistors to create a mixer with good linearity, isolation, dynamic performance, and power handling. The mixer is designed to be biased in the linear region using a gate bias/tail current configuration, rather than with a voltage follower/source follower configuration. This allows the mixer to remain in the linear region, enhancing its linearity, isolation, and dynamic range performance.

The input signal passes through a high-frequency preamplifier prior to entering the mixer core. This preamplifier amplifies the signal to a voltage level suitable for the gate of the MESFET and allows a very wide range of input signals to be handled. The LO signal is then applied to the gate of the MESFET, which then modulates the current flowing through the device. The resulting output of the mixer is the sum and difference frequencies derived from the mix. This output is then amplified, filtered, and signaled to the desired device.

The HMC363 active mixer is a perfect choice for a wide range of applications. It has a high-performance conversion gain and excellent third-order harmonic distortionperformance, and it is suitable for use in a variety of RF ICs and modules. Its integrated LO buffer, wide dynamic range, low noise figure, and power handling capabilities make it an ideal choice for a number of applications, particularly those requiring high performance in a space-constrained design.

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