RF 8-bit Digital Phase Shifter For Active Antenna Applications


A new full-range RF 8-bit digital phase shifter for active antenna applications is recently launched by Peregrine Semiconductor. The UltraCMOS PE44820 is a monolithic, digitally controlled digital phase shifter in a 32-lead 5mm x 5mm x 0.85mm QFN package and covers a 358.6° phase range.

With a frequency range of 1.7-2.2GHz, the device is intended to optimize the transmission phase angle in the wireless infrastructure and radar markets, providing repeatable RF performance to applications such as antenna beam-forming, distributed antenna systems (DAS) and phased-array antennas.

“The demonstrates a core capability that Peregrine is now incorporating into fully integrated solutions such as our monolithic phase and amplitude controller (MPAC) product family. This full-range digital phase shifter offers many advantages over discrete implementation. It is easy to design-in, requires little PCB space and has flexible programming”, says director of marketing Kinana Hussain.

Compared to competing solutions, the PE44820 digital phase shifter offers a fuller phase range, better phase accuracy, lower root mean square (RMS) phase and amplitude error, higher linearity and a larger temperature range, claims the company.

Covering a phase range of 358.6° in 1.4° steps, the device has a phase accuracy of +3°, RMS phase error of just 1°, and RMS amplitude error of 0.1dB. Linearity of 60dBm IIP3 ensures that the phase shifter does not degrade the array transceiver’s linearity. An integrated digital control interface supports both serial and parallel programming of the phase setting.

Fabricated using Peregrine’s UltraCMOS technology, the PE44820 has an extended temperature range from -40°C up to 105°C and a wide power supply range of 2.3-5.5V. The PE44820 is also capable of extended frequency operation of 1.1-3.0GHz for narrow-band applications. An application note ‘Optimising the Phase Accuracy of the PE44820 Phase Shifter’ explains this capability.


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