Wideband mm-Wave CMOS Slow Wave Coupler

Research output: Contribution to journalArticle


Research units


In this letter, we have presented a design of on-chip millimeter-wave 3-dB quadrature coupler that utilizes the coupled slow wave coplanar waveguide. The designed CMOS coupler covers the whole E- and W-band and occupies a silicon area of only 0.0115 mm 2 , which is significantly smaller compared to the conventional microstrip-line-based Lange couplers. Measurement of the quadrature coupler shows a -3.5 dB through and a -4.4-dB coupling at 90 GHz. A less than ±1-dB amplitude and a ±4° phase errors from 55 to 110 GHz are recorded.


Original languageEnglish
Article number8627920
Pages (from-to)210-212
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number3
Publication statusPublished - 1 Mar 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • 3 dB, CMOS, coupled line, coupled slow wave coplanar waveguide (CS-CPW), coupler, E-band, Lange coupler, millimeter-wave (mm-wave), quadrature, SiGe, slow wave, W-band

Download statistics

No data available

ID: 32820578