Analysis of μr tan δe and tan δm of magneto dielectric substrates

Abstract

Effect of permeability(μr), dielectric loss tangent (tan δe) and magnetic loss tangent (tan δm) of magneto dielectric (MD) substrates, on the microstrip patch antenna gain and area is presented. A parametrical study has been carried out to analyze the antenna characteristics on the MD substrate. An MD substrate with εr= 7, μr=1.82, tan δe = 0.005, tan δm = 0.02 is realized using commercial grade polypropylene and Y-type hexaferrites (YHF). Effect of permeability on the gain and area of the microstrip patch antenna is analyzed for a range of μΓ from 1 to 15. Microstrip patch antenna on an MD substrate exhibits a gain variation of 2.9dB to 2.08dB for dielectric loss tangent (tan δe) variation from 0.002 to 0.01 and 2.91dB to 0.125dB and magnetic loss tangent (tan δm) variation from 0.02 to 0.05.