低噪声放大器Paper阅读中公式推导求助

回到原点1994

在阅读文章《A 140 GHz, 4 dB Noise-Figure Low-Noise Amplifier Design with the Compensation of Parasitic Capacitance Cgs》推导公式的时候（具体见附件），按照图3写出S点的KCL和KVL的方程，利用Wolfram软件得到的结果，分子能够跟文章对上，但分母中还有几项不太明白是怎么消去的。求助大佬帮个忙啦


文章引用：D. Wei et al., "A 140 GHz, 4 dB Noise-Figure Low-Noise Amplifier Design with the Compensation of Parasitic Capacitance CGS," 2019 IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS), 2019, pp. 299-302, doi: 10.1109/MWSCAS.2019.8884937.


引文链接：https://ieeexplore.ieee.org/document/8884937

dannymu

谢谢