標題: Comparison on mHEMT Q-Band Sub-Harmonic Mixers With/Without Delay Compensation
作者: Syu, Jin-Siang
Meng, Chinchun
Su, Jen-Yi
Huang, Guo-Wei
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Q band;metamorphic high electron mobility transistor (mHEMT);sub-harmonic mixer (SHM)
公開日期: 2010
摘要: Q-band sub-harmonic mixers (SHMs) with and without delay compensation are demonstrated in this paper using 0.15-mu m metamorphic high electron mobility transistor (mHEMT) technology. A conventional stacked-LO sub-harmonic mixing cell consists of two Gilbert cells in cascode with quadrature LO inputs. The proposed compensation core in parallel with the stacked-LO core improves the port-to-port isolation. A Marchand balun is employed at the RF port to generate wideband differential signals. As a result, SHMs w/ and w/o compensation achieve the conversion gain of 1/0.5 dB and noise figure of 23/20 dB when 2f(LO)=39/42 GHz. However, the compensation circuit improves the 2LO-to-RF isolation by 12 dB, 2LO-to-IF isolation by 5 dB and RF-to-IF isolation by 5 dB without additional power consumption.
URI: http://hdl.handle.net/11536/25754
ISBN: 978-2-87487-017-0
期刊: 2010 EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE (EUMIC)
起始頁: 194
結束頁: 197
Appears in Collections:Conferences Paper