Small-Size Modified Meander Line Antenna for Dual-Band (433.92MHz and 2.45GHz) Operation

Abstract

A miniatured dual-band meander line monopole antenna with a size of 60 × 20 mm2 and a considerably short ground plane been proposed for the operations in both 433.92MHz and 2.45GHz bands. The proposed antenna exhibits quite acceptable radiation characteristics at two such resonance frequencies which are not only harmonically unrelated but also are separated by a large band gap. An unconventional non-parodically meandered conductor, two rectangular conductor patches and a short size ground plane were used in the realization of required dual resonance on a FR4 substrate. The proposed conductor meandering scheme is responsible of producing a non-periodic resonance spectrum while the addition of stub like rectangular conductor patches provide the required parasitic impedance to obtain resonances at desired frequencies. The position and size of conductor patches are used to tune and match the required resonance frequencies. The proposed antenna was simulated in ANSYS and provides about -20dB return loss at both frequencies along with a peak total gain of 1.91dB and 4.67dB at 433.92MHz and 2.45GHz respectively.