A Dual-Band Dipole Array Antenna With Fan-Beam Characteristics for C- and X-Band Applications.

A dual-functionality printed dipole array antenna is proposed in this study with a fan-beam property. An integrated balun structure cooperation with the dipole arms creates a resonance in the X-band for the antenna. Adding Single-Ring Split-Ring Resonator (SR-SRR) next to the feed line allows another resonance in the C-band. This way, a dual-band dipole array antenna with identical radiation properties is accomplished. Considering the distance between the two resonances of the antenna, the main contribution of this work is the similar radiation pattern in the two frequency bands of the antenna. According to the experimental results, the introduced antenna can cover the frequency band of 4.52-5.83 GHz for C-band applications (such as; satellite communication and microwave relay) and 9.08-9.66 GHz for X-band applications (such as; weather mapping and detecting and long-range tracking radar) with peak gains of 9.05 dBi and 11.30 dBi respectively and similar fan-beam radiation patterns in two frequency bands.