“Design Narrow-Band Frequency Amplifier (1.5GHz -1.6GHz) Based on InGaP Heterojunction Bipolar Transistor (HBT) and GaAs HBT”. Journal of Engineering 27, no. 2 (February 1, 2021): 13–26. Accessed May 12, 2024. https://joe.uobaghdad.edu.iq/index.php/main/article/view/1275.