A K-Band Frequency Doubler With 35-dB Fundamental Rejection Based on Novel Transformer Balun in 0.13-mu m SiGe Technology

作者：Chakraborty Sudipta^*; Milner Leigh E; Zhu Xi; Hall Leonard T; Sevimli Oya; Heimlich Michael C

来源：IEEE Electron Device Letters, 2016, 37(11): 1375-1378.

DOI：10.1109/LED.2016.2611535

• Frequency doubler
• transformer balun
• SiGe
• bandwidth

A compact balanced frequency doubler with more than 35 dB odd-harmonic rejection and fractional bandwidth of 73% is presented in this letter. Wide bandwidth and high odd-harmonic suppression is achieved by adopting a new technique for the transformer balun design, resulting in a very low magnitude imbalance of 0.13 dB and a phase imbalance of 0.4 degrees over 7-15 GHz. The balun performance is improved by offsetting the radius of the primary and secondary coils, which reduces the parasitic coupling capacitance. The input and output frequency ranges for the doubler are 7-15 GHz and 14-30 GHz respectively. The circuit was fabricated in 0.13-mu m SiGe technology. The chip size is 0.6 mm x 0.4 mm.

• 出版日期2016-11