The Design of a Plastic Packaged Front-end IC for mmWave 5G

The presentation will start by reviewing semiconductor technology choices and SMT packaging options for mmWave ICs. It will then describe the development of a front-end mmWave IC containing LNA, PA, RF power detector, transmit/receive switch and associated control logic. The IC was designed for 28GHz (27.5 to 28.35GHz) time division duplex (TDD) 5G applications. It was developed on a 4V, 0.15µm enhancement mode GaAs pHEMT process and so only positive supply voltages are required. It has been packaged in a standard, low-cost 5mm x 5mm overmoulded plastic QFN package making it suitable for the high volume, low cost manufacturing. The transmit path was optimized for high efficiency when backed-off from compression to provide linear amplification and preserve modulation fidelity. When driven at 1dB gain compression it produces an output power of around 20dBm at a PAE of 20%. When backed off for linear operation, to an IMD3 point of -35dBc, the measured PAE is 6.5%. The receive path has a measured gain of 13.5dB with a noise figure of around 3.3dB from a supply current of just 10mA. The receive path also demonstrates impressive linearity of +20dBm IP3 for a modest power consumption of just 40mW. Details of the design approach, the IC layout and the incorporation of packaging parasitics to provide optimised performance of the packaged part on a representative PCB will be presented.

Subscribe to the CW newsletter

This site uses cookies.

We use cookies to help us to improve our site and they enable us to deliver the best possible service and customer experience. By clicking accept or continuing to use this site you are agreeing to our cookies policy. Learn more

Start typing and press enter or the magnifying glass to search

Sign up to our newsletter
Stay in touch with CW

Choosing to join an existing organisation means that you'll need to be approved before your registration is complete. You'll be notified by email when your request has been accepted.

Your password must be at least 8 characters long and contain at least 1 uppercase character, 1 lowercase character and at least 1 number.

I would like to subscribe to

Select at least one option*