Abstract —This paper presents an omnidirectional high-gain
dual-mode dipole antenna design with simple architecture. The
proposed antenna system was composed of a rectangular antenna
main body and a reflective ground plane. The antennas was "H"
shaped and fabricated on a single-sided FR4 substrate. The area
of the antenna system was 53 x 31 mm2, and a 50Ω micro-strip
was used as a feeding pin at the center of the rectangular antenna
main body. This antenna design included two frequency band
ranges. For the Global Positioning System (GPS), the 1.57542
GHz frequency band was used. For WLAN, the 2.4 – 2.485 GHz
frequency band was used. In the GPS frequency band the
proposed antenna exhibited good omnidirectional properties and
gain of 1.6–1.7 dBi. In the WLAN frequency band the proposed
antenna exhibited good directional properties and gain of 6.2–6.3
dBi. This antenna design showed excellent performance when
used for GPS and WLAN.
Index Terms —Dipole, WLAN, directivity, GPS, omni
directivity.