Simulation, design and integration of 60 GHz Gallium Nitride transceiver into nano-ferrite circulator on-silicon CMOS substrate
In this work the design and integration of 60 GHz monolithic microwave integrated circuit (MMIC) transceiver using 0.15 um Gallium Nitride (GaN) Qorvo process that will support the Wireless Gigabit Alliance (WiGig)/802.11ad radio specifications will be presented. The wideband GaN Power Amplifier (PA) can operate at 60–65 GHz with output power of 27 dBm and large signal gain of 23.5 dB. The wideband Low Noise Amplifier (LNA) has a small signal gain of 16 dB with a noise figure (NF) of 1 dB. The GaN PA and LNA are integrated to a nano-ferrite on-silicon CMOS circulator to construct a single front-end transceiver module.
Millimeter wave hexagonal nano-ferrite circulator on silicon CMOS substrate
Hexagonal ferrites such as BaFe12O19 have very strong uniaxial anisotropic magnetic field and remanent magnetism. By employing these properties, magnetic devices can work in the tens of GHz frequency range without strong external magnetic field. The micro- and nano-sized hexagonal ferrite can be conveniently utilized to fabricate magnetic components integrated in CMOS integrated circuits. A circulator working at 60 GHz is designed and integrated into the commercial CMOS process.
Yig Thin Film used to Miniaturize a Coplanar Junction Circulator
The preparation of Yttrium Iron Garnet films (YIG) presenting controlled magnetic properties is of great interest for miniaturization of RF passive components. The present work deals with the integration of YIG ferrite sputtered films for coplanar circulators. These components must work at frequencies above 10 GHz, and they must be compatible with mass-production and low-cost process. The YIG films (of thickness 15 μm) are deposited on an alumina substrate by RF magnetron sputtering. Their structural mechanical and magnetic properties in the millimetre wave range are optimised to enable the film's integration. A circulator is fabricated using such prepared film, and its properties in the microwave range are characterised using a network analyzer and a probing system.