Wireless Communication systems operate in the microwave frequency range. In order for the communication system to achieve tunability across the frequency range, the bandpass filters of the transreceiver are made to achieve tunability by tuning both the capacitors and inductors which are the major components of the filters. This thesis is focused on the design of the tunable solenoid magnetic core inductors which involves modelling the solenoid magnetic core inductor to achieve substantial inductance, minimum resistance and a high-quality factor at the microwave frequency range. This thesis also proposes a potential fabrication process for the magnetic solenoid inductor. Two different magnetic cores with high and low permeabilities are used in the modelling to compare results, however the low permeability material, which is a synthetic antiferromagnet (CoFe/Ru/CoFe) is better suited for the filter application because it has a higher ferromagnetic resonance frequency, and therefore higher bandwidth, than the high permeability material (CoFeB).