WASET
    Yufu Yin and  Tao Lin and  Shanghong Zhao and  Zihang Zhu and  Xuan Li and  Wei Jiang and  Qiurong Zheng and  Hui Wang,  Frequency-Dependent and Full Range Tunable Phase Shifter.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2018, vol. 142(10). 202 - 207
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/10009685.