Title :
Fractal-shaped switched-beam antenna with reduced size and broadside beam
Author :
Chen, Wei-Ling ; Wang, Guang-Ming ; Zhang, C.-X.
Author_Institution :
Inst. of Missile, Air Force Eng. Univ., Xi´an
Abstract :
A switched-beam antenna with reduced size and broadside beam based on the fractal Butler feeding network and fractal patch antenna array is proposed. The circuit sizes of the fractal-shaped branch-line couplers, 0 dB crossovers, and patch antennas, are 43.7, 50.1 and 74% smaller than their conventional counterparts, respectively. A four-beam prototype has been constructed. Measurement indicates that broadside beams with sidelobes below -10 dB are achieved.
Keywords :
adaptive antenna arrays; antenna feeds; array signal processing; fractal antennas; microstrip antenna arrays; microstrip couplers; Butler feeding network; beamforming network; broadside beam; four-beam prototype; fractal-shaped branch-line coupler; patch antenna array; smart antenna technology; switched-beam antenna;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20081502
