ON-CHIP FGCPW LOWPASS AND BANDPASS FILTERS WITH LOW INSERTION LOSS AND HIGH STOPBAND REJECTION FOR V-BAND APPLICATIONS

This paper presents compact on-chip flnite ground coplanar waveguide (FGCPW) lowpass fllter (LPF) and bandpass fllter (BPF) for V-band multi gigabit per second (Gbps) wireless personal area network (WPAN) applications. The equivalent lumped-element circuit of the proposed fllters can be represented by an ABCD matrix which is obtained by consecutively multiplied ABCD matrixes of one T-network impedance and two shunt admittances. The full-wave EM simulators, Ansoft TM HFSS and Agilent TM Momentum, were used to flne tune the desired frequency response. The FGCPW LPF and BPF were implemented in WIN TM semiconductor 0.15"m pHEMT process. The obtained insertion losses are smaller than 0.5dB and 1.5dB with return losses of better than 12dB and 13dB, respectively. The 1-dB bandwidths of the LPF and BPF are 70GHz (0{70GHz) and 11GHz (55{66GHz), respectively. The stopband rejections are better than 20dB from 95 to 120GHz in the LPF, and from 0 to 42GHz and 82 to 120GHz in the BPF. The measured frequency responses show good agreements with the simulations. The chip size is very compact of 0:43 £ 0:45mm 2 .