Monolithic integrated fully differential antenna diplexer for UWB applications

A monolithic integrated UWB diplexer design and measurements will be presented. This diplexer is fabricated on high ohmic silicon substrate. The diplexer is based on two 4^th order inverse Chebyschev filters, one for each band. The effects of bonding pads and wires are included in the design. The simulated designed diplexer achieves insertion loss as low as 2.5 dB in the band from 3 to 5 GHz and 3.5 dB in the band from 7 to 9 GHz and occupies an area of 2.25 mm² (1.5 mm times 1.5 mm).