HMC507LP5TR

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Radar Frequency(RF) amplifiers are an essential part of modern communication systems, providing the needed amplification of signals and additional gain so that they would not be lost in propagation. HMC507LP5TR is arguably the most popular active amplifier in the RF world. This article looks at the applications of HMC507LP5TR in addition to the underlying working principles.

Applications

HMC507LP5TR is capable of operating in a frequency range as wide as 1.6 to 2.5GHz; this means it can be applied to many RF amplification applications including satellite communications, television, radar, mobile communication systems, and more. The HMC507LP5TR offers excellent noise performance, with a Voltage Noise Figure of 1.2 dB at 1.9GHz and low linearity voltage noise. Additionally, its small size and its low power consumption makes it an excellent choice for portable devices and handheld equipment.

Another great aspect of this amplifier is its low distortion characteristics, with third-order intercept point (IP3) of +36dBm — providing excellent linearity while at the same time delivering low intermodulation distortion when used in a 3rd order system.

HMC507LP5TR is also capable of working with an input signal of up to +20dBm, which means that it can handle higher power levels than its competitors, making it ideal for use in more demanding applications such as base-stations.

Working principle

At the core of the HMC507LP5TR lies a double balanced mixer — consisting of two balanced mixers, each with its own gain-controlled amplifier — which is used to control the gain of the device. A gain control loop is also used to maintain a constant power output regardless of the input signal level.

The signal first enters the mixer and is split into two sides, and the signal gains from each side are then adjusted separately. The amount of gain on each side can be adjusted to adjust the overall gain of the signal, and this is done by adjusting the gate voltage of the MESFET transistors. The adjusted signals are then combined together to form one amplified signal.

The resulting amplified signal is then fed into a power amplifier which is designed to provide high power output — up to 80 watts. The power amplifier is also equipped with an integrated low pass filter which helps reduce noise and clipping, making the final output signal more reliable and consistent.

The HMC507LP5TR also includes an integrated (PI) control loop, which ensures that the output signal remains stable and that any changes in the input signal do not affect the power output.

Conclusion

The HMC507LP5TR is a great choice for RF amplification applications, especially in satellite communications, television, radar, mobile communication systems and more. Its excellent noise performance, low power consumption, low distortion characteristics, and high power output makes it a great choice for use in demanding applications. Moreover, its integrated gain control loop and low pass filter set it apart from its competitors.

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