Li, J.Q. Chen, Q.S. Fan, K. Tang, K. Tian, P. JACoW Publishing Geneva, Switzerland 978-3-95450-201-1 10.18429/JACoW-IBIC2018-TUPB10 English 281-283 TUPB10 coupling impedance proton dipole electron Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-IBIC2018-TUPB10 http://jacow.org/ibic2018/papers/tupb10.pdf Proton beams used in Huazhong University of Science and Technology Proton Therapy Facility（HUST-PTF）have extreme low currents of the order of nanoampere，which is a great challenge to beam diagnostics due to low signal level. Conventional destructive beam diagnostic devices will affect the quality of the beam and cannot work online during the patient treatment, so a non-destructive stripline beam position monitor (BPM) is designed. This study will introduce some analysis and simulation results of the stripline BPM, such as the coupling between the electrodes, impedance matching, signal response, etc. We also discussed how to increase the output signal by geometry optimization.