ADRF6720-27-EVALZ

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This article will discuss the application fields and working principles of the ADRF6720-27-EVALZ, which is classified as a RF Evaluation and Development Kit, Board. This evaluation board is an advanced 4G LTE Envelope Tracking RF Evaluation Board that adjusts the RF supply voltage and transmitter amplifier in order to maximize efficiency and reduce power dissipation.

This board is designed to evaluate the ADRF6720-27 as an envelope tracking system to support 4G LTE waves that operates within the 690MHz to 2700MHz frequency range. This board provides a platform to observe and analyse AC and DC performance of the RF signal under all LTE operation conditions.

This evaluation board includes an XMC-4500 Cortex M4 microcontroller as a host control unit, a PMB8703 envelope tracking power module along with a PMB7722-E VC-compensated power amplifier. The ADRF6720-27-EVALZ board is connected to a 4G USB dongle antenna that is required to communicate wirelessly. It also features two debugging headers, one for generic JTAG with Aux pins and one for the extended debug port support.

In application to 5G, this board could be used for beamforming. This is a process where multiple antennas in the form of a 5G array are used to send and receive signals at different angles. This allows 5G to increase data rates and distances of transmissions while still being effective. Beamforming can also be used to reduce interference in a crowded area.

The operating principles of the ADRF6720-27-EVALZ board are straightforward. The XMC-4500 microcontroller continually monitors and collects data on the input power detector, transmission power amplifier, envelope tracking circuit, VPWM signal, bias control and the PLL. This information is determined and received by the XMC-4500 to control the ADRF6720- 27-EVALZ board.

The power amplifier is the key component of the system due to its influence on the overall system performance. It amplifies the low level RF signal from a transmitter\'s antenna to a signal level that is suitable for transmission. The voltage on the envelope tracking circuit adjusts with the input power signal in order to maximize the power amplifier efficiency, reduce the power dissipation, and keep the linearity in a better way. The PWM signal from the XMC-4500 controller is monitored and used to control the envelope tracking power module. The bias control circuit manages the amount of current granted to the power amplifiers to adjust the output power of the system accordingly. The transmission power amplifier operates with a fixed supply voltage obtained from the PMB8703 power supply module.

The ADRF6720-27-EVALZ Board provides several features and functions to aid in the development of high performance designs. These include: RF signal performance optimization through envelope tracking, extended debug port and generic JTAG headers for debugging and analysis, a 4G USB dongle antenna for wireless communication, and a PMB8703 power module and PMB7722-E VC-compensated power amplifier to adjust the supply voltage and transmitter amplifier.

All in all, the ADRF6720-27-EVALZ board is considered a powerful RF Evaluation and Development Kit for 4G LTE applications. Its application fields include 5G beamforming, while its principles of operation involve the XMC-4500 microcontroller continuously monitoring and collecting data in order to adjust the ADRF6720-27-EVALZ board. The board also features features and functions to aid in the development of high performance designs.

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