Title :
A linearly polarized radial line slot antenna
Author :
Ando, Makoto ; Numata, Tomoyuki ; Takada, Jun-ichi ; Goto, Naohisa
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Japan
Abstract :
A design for linearly polarized radial line slot antenna (RLSA) is proposed. A novel slot arrangement is presented which couples to the rotationally symmetric guided waves to produce a uniform aperture distribution with linear polarization. Basic characteristics were measured in the 12-GHz band on a model antenna. The radiation patterns indicate a reasonable cross-polarization level more than 15 dB below the copolarization. The poor VSWR response is typical for waveguide broadside arrays. A technique to suppress this reflection is to tilt the beam from the boresight.<>
Keywords :
antenna radiation patterns; microwave antennas; receiving antennas; television antennas; waveguide antennas; 12 GHz; VSWR; cross-polarization level; linear polarization; radial line slot antenna; radiation patterns; rotationally symmetric guided waves; uniform aperture distribution; waveguide broadside arrays; Antenna measurements; Apertures; Arrayed waveguide gratings; Degradation; Microstrip antennas; Planar arrays; Polarization; Receiving antennas; Satellite broadcasting; Slot antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
