Self-Biased Magnetic Pendulum Array (SBMPA) is an efficient and portable transmitter in ultralow frequency (ULF). The resonance frequency of SBMPA is affected by the magnetic field of the radially magnetized cylindrical permanent magnets. In order to calculate the resonance frequency. the magnetic field model of a single radially magnetized cylindrical permanent magnet is derived base... https://lockdownsecuritycanada.shop/product-category/side-view-camera-bundle/