Isolation Enhancement of Antenna Pair for Implantable Application

A compact two element implantable antenna operating in 2.4 GHz ISM band with enhanced isolation is presented. The reduction of coupling between two implanted radiating elements in a human body environment is realized by placing a Meander line resonator as a decoupling element. Moreover, the mutual coupling between two antennas is studied and quantified by using a circuit model analysis. The proposed antenna features a very good miniaturization with the dimensions of 0.06λ
0
× 0.14λ
0
× 0.01λ
0
where λ
0
is the free-space wavelength at operating frequency.