Broadband microwave frequency doubler based on left-handed nonlinear transmission lines<xref rid="cpb_26_3_037306fn1" ref-type="fn">*</xref><fn id="cpb_26_3_037306fn1"><label>*</label><p>Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61401373) and the Research Fund for the Doctoral Program of Southwest University, China (Grant No. SWU111030).</p></fn>

Broadband microwave frequency doubler based on left-handed nonlinear transmission lines**

Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61401373) and the Research Fund for the Doctoral Program of Southwest University, China (Grant No. SWU111030).

Huang Jie^{1, †}, Gu Wenwen¹, Zhao Qian²

(color online) (a) Measured and simulated second harmonic output power versus second harmonic frequency of the Ka-band MMIC harmonic generator on CRLH NLTLs fed by 20 dBm input signal at 0 V bias. (b) Measured second harmonic output power versus input power of harmonic generator on CRL NLTLs fed by 13 and 15 GHz input signal.