This paper presents two monolithic transformer structures exhibiting high self resonance frequencies(fSR). Effect of positive and negative coupling factor on self resonance frequency is investigated. The transformer turn ratio and structure is selected to improve design and ease layout of a high frequency LNA and VCO. Measurement results of a transformer show good agreement with simulated values and demonstrate a coupling factor of 0.7 at 20 GHz.
|Title of host publication||IEEE Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, 2009 : SiRF '09 ; San Diego, CA, USA, 19 - 21 Jan. 2009|
|Editors||William J. Chappell|
|Place of Publication||Piscataway|
|Publisher||Institute of Electrical and Electronics Engineers|
|Publication status||Published - 2009|