A Unidrectional Antenna Comprising a Dipole and a Loop
A Unidrectional Antenna Comprising a Dipole and a Loop
Some handheld electronic devices that require a directional pattern are equipped with directional printed antennas, along with a large ground plane. However, such an arrangement is cumbersome and expensive for small devices. The drawback inspires the invention of this novel unidirectional antenna for transmitting and receiving radio frequency waves. The antenna comprises a dipole antenna and a rectangular loop antenna connected by a metallic connecting element. The dipole antenna, loop antenna and the metallic connecting element are formed on a substrate. A unidirectional radiation pattern with front-to-back ratio of 20dB can be generated. The antenna operates at the range of 2.4 GHz, and the peak measured gain is 4.2dbi at 2.44 GHz.
• For use in small devices that require a unidirectional radiation pattern
23/10/2008
12/257,111
香港
