Micro-Power Antenna With Adjustable Q-Factor and Radiation Distribution

This paper has designed a micro-power antenna architecture in which a component-based flexible ferromagnetic core is integrated into a coaxial diameter-distributed coil with twisted loop antenna (DDC-TLA). A stereo-crossed distributed winding method is introduced to reduce the paradise capacitance in the DDC-TLA. The magnetic-core components are made of the mixture of Fe/Citrate nanoparticle composite and polydimethylsiloxane solution, they are filled in a flexible rubber substrate to achieve adjustable permeability and wearable flexibility. Based on the above architecture, an optimized algorithm is proposed to reduce power loss while determining the preferable structure of the DDC-TLA and the suitable ingredients of the magnetic core. Finally, simulations and experiments are conducted to confirm its performance in terms of higher quality factor, lower heat loss, and better signal waveform.