Dielectric Microwave Components with Magnetic Films for Communications

Thick films of $\mathbf{Ni}_{1\text{-}\mathbf{x}}\mathbf{Zn}_{\mathbf{x}}\mathbf{Fe}_{2}\mathbf{O}_{4}$ ferrites were polymerized on the dielectric $\mathbf{BaTi}_{4}\mathbf{O}_{9}\text{-}\mathbf{ZnO}$ substrates using suspensions consisting of photopolymer and weakly agglomerated ferrimagnetic particles. Structures including magnetic and nonmagnetic components make it possible to control the energy transfer and operating frequencies while maintaining the relatively high quality factor of the structure. The optimal composition of film and other features of film obtaining were revealed. The maximal controlled by magnetic field change in resonance frequency for obtained elements was around 71 MHz. The value of the decoupling was around 60 dB. Such elements can operate as microwave valves, phase shifters, and resonators and be used in GSM, 5G networks.