Design of a Dual-Band Slot Antenna with a Large Frequency Ratio

This article proposes and studies a dual-band slot antenna based on a band gap waveguide(BGW) with a large frequency ratio. The dual-band antenna is designed based on the theory of waveguide slot design. The waveguide slot design theory was used to create the dual-band antenna with a frequency ratio of up to 5.6. The experimental results show good impedance matchings are achieved from 11.02GHz to 11.19GHz for low frequency(LF) and from 60.8GHz to 63.4GHz for high frequency(HF), respectively. The gains are 7.5 dBi and 11.6dBi.