Analog Devices ADMV49281 Product Info

The ADMV49281 is a silicon on insulator (SOI), 37.0 GHz to 43.5 GHz, mmW 5G beamformer. The RFIC integrated circuit (RFIC) is highly integrated and contains 16 independent transmit and receive channels. The ADMV49281 supports eight horizontal and eight vertical polarized antennas via independent RFC_V and RFC_H inputs and outputs.

In transmit mode, both the RFC_V input and RFC_H input signals feed into separate digital variable gain amplifiers (DVGAs). Each path after the DGVAs splits into eight independent channels via the 1:8 power splitters. In receive mode, input signals pass through either the vertical or horizontal receive channels and combine via two independent 8:1 combiners to separate DVGAs to the common RFC_V pin or RFC_H pin. In either mode, each transmit and receive channel includes a vector modulator to control the phase, and one DVGA to control the amplitude. The vector modulator provides a full 360° phase adjustment range in either transmit or receive mode to provide 6 bits of resolution for 5.625° phase steps. A phase step policy for the transmit and receive vector modulator is provided to ensure optimum phase step performance. The total DVGA dynamic range in transmit mode is 34.5 dB, which provides 6 bits of resolution that results in 0.5 dB amplitude steps and 5 bits of resolution that results in 1 dB amplitude steps. In receive mode, the total dynamic range is 28 dB, which provides 5 bits of resolution that results in 0.5 dB amplitude steps and 5 bits of resolution that results in 1 dB amplitude steps. The DVGAs provide a flat phase response across the full gain range. Each transmit channel contains a power detector to detect either modulated or continuous wave signals to calibrate for each channel gain as well as channel to channel gain mismatch. The ADMV49281 RF ports can be connected directly to a patch antenna to create a dual or single polarization mmW 5G subarray.

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