Design of Broad band Microstrip Patch Antennas using Air Gap in Microwave Frequency

Study on miniaturization and broadband of patch antenna using magneto-dielectric substrate

“…There are many methods for miniaturization and broadband of antennas. Popular methods are using high permittivity substrate, air gap, via hole and so on [1]. But the return loss, bandwidth, impedance and gain of antenna become worse by using high permittivity substrate because efficiency of antenna is decreased.…”