Design of the Wide Dual-Band Rectangular Souvenir Dielectric Resonator Antenna

Design of the wide dual-band rectangular souvenir dielectric resonator antenna (DRA) is discussed. The proposed wide dual-band rectangular DRA was excited by using a U-slot. The $TE_{111}{<<^>>{\mathrm {y}}}$ mode of the rectangular DRA and the slot resonator were employed to design the lower band, while the higher-order $TE_{113}{<<^>>{\mathrm {y}}}$ and $TE_{311}{<<^>>{\mathrm {y}}}$ modes were utilized to design the upper band. By merging two pairs of modes in each band, the impedance bandwidth of the lower and upper bands were enhanced simultaneously. New design formulas that determine the dimensions of the wide dual-band rectangular DRA were obtained. Design guideline was also given to facilitate the design. To demonstrate the usefulness of the formulas, a wide dual-band rectangular DRA fabricated using K-9 glass was designed for 2.4/5.2-GHz WLAN applications. To upgrade the antenna as the souvenir-DRA, the word LOVE was carved on the sidewall of the glass DRA by using the sandblasting machine, and it was found that the content and position of the word has little effect on the antenna performance. The impedance bandwidths of the proposed wide dual-band DRA can be achieved as 25 for the lower band and 13 for the upper band.