Application of Magnetic Biasing to improve bandwidth in DRA coupled Patch antenna using PBG substrate

The paper presents the DRA-Patch hybrid structure on photonic band gap substrate for bandwidth improvement. The DRA-Patch pair Structure is aperture coupled by micro strip excitation. EM fields to DRA are magnetically coupled by the slot fed by microstrip line. DRA of high permittivity material provided less loss EM fields. These fields have been coupled to microstrip patch placed above the DRA through air gap. Magnetic Biasing has been implemented to effect enhancement of bandwidth. Magnetic Bias impacts dipole moments of ferrite material in DRA and thus alters permittivity of DRA material which shows frequency shifts as per chosen magnetic bias. Since almost all the structures available in nature are resonant due to its inherent capacitance and inductances. Combined effect of resonance enhances bandwidth. Optimisation has been carried out, to increase bandwidth and has been enhanced to almost 100% FB incorporating partitioning technique. Application of such antenna can be implemented in 802.11 Bluetooth or wi-fi communications.