Broadband planar dipole array Antenna with double C-shaped slit elements for digital TV broadcasting transmission

Abstract

This research has proposed a planar rectangular dipole antenna enclosed in double C-shaped parasitically slit elements (i.e., radiator element) on a double-cornered reflector for bandwidth enhancement. In the study, simulations were first carried out to determine the optimal parameters of the radiator element and then a radiator element prototype was fabricated and mounted onto a double-cornered aluminum reflector. The simulated and measured |S 11 |<-10 dB of the antenna element covered the frequency ranges of 451-901 MHz (66.6%) and 455-886 MHz (64.3%), respectively. The gain was enhanced by the subsequent deployment of multiple radiator elements to fabricate a four-element vertically array antenna on an elongated double-cornered reflector. The simulated and measured |S 11 |<210 dB of the array antenna, respectively, covered the 410-991 MHz (82.9%) and 415-886 MHz (72.4%) frequency ranges. The proposed array antenna radiates unidirectionally across the DTV frequency band with a measured front-to-back ratio and cross polarization >20 and <223 dB, respectively. The simulated and measured half-power beam widths in the E and H planes were respectively 568 6 138 and 208 6 68; and 578 6 138 and 218 6 68. In addition, the simulated and measured gains of the array antenna were 12.8-16.4 dBi and 11.3-15.8 dBi along the 470-862 MHz frequency range. This proposed array antenna is thus suitable for DTV broadcasting transmission. V C 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:466-478, 2016.

On the multi‐resonant antennas: Theory, history, and new development

“…These works have well confirmed that the multi‐resonant concept should exhibit good robusty and potential for antenna designs in extremely critical installing environments, like all‐metal mobile handsets, or other compact consumer electronic devices. More recently, multi‐resonant dipole antenna array for digital TV transmission has been developed by using dipoles loaded with parasitic C‐shaped elements …”