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70 GHz Folded Loop Dual-Mode Bandpass Filter Fabricated Using 0.18 \mu m Standard CMOS Technology

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3 Author(s)
Cheng-Ying Hsu ; Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan ; Chu-Yu Chen ; Huey-Ru Chuang

This letter presents the design and implementation of a 70 GHz millimeter-wave compact folded loop dual-mode on-chip bandpass filter (BPF) using a 0.18 mum standard CMOS process. A compact BPF, consisting of such a planar ring resonator structure having dual transmission zeros was fabricated and designed. The size of the designed filter is 650 X 670 mum2. Calculated circuit model, EM simulated and measured results of the proposed filter operating at 70 GHz are shown in a good agreement and have good performance. The filter has a 3-dB bandwidth of about 18 GHz at the center frequency of 70 GHz. The measured insertion loss of the passband is about 3.6 dB and the return loss is better than 10 dB within the passband.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:18 ,  Issue: 9 )

Date of Publication:

Sept. 2008

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