Decoupling stub-loaded parallel dipole array with orthogonal polarization

Orthogonal Polarization Agile Planar Array Antenna

Acknowledgement I would especially like to express my most sincere thanks to my advisor, Professor Masayoshi Aikawa, for his invaluable guidance, advice, encouragement and support throughout the completion of my study and this thesis. I would also like to express my appreciation to the members of my thesis committee, Professor Kohei Arai, Professor Tatsuya Furukawa, Associate Professor Sumio Fu...

Spatial Polarization Characteristic of orthogonal polarization binary array antenna

CPW-Fed Stub-Loaded Slot Dipole Antenna Design for Dual-Band Operation

A novel uniplanar slot dipole antenna fed by a coplanar waveguide (CPW) is proposed for dual-band operation. The frequency ratio between the first spurious and fundamental modes of the slot dipole antenna can be conveniently adjusted with the use of four slot stubs introduced on its two arms. Furthermore, the radiation patterns at the first spurious mode are modified by adding four parasitic sl...

A New Design of Log-Periodic Dipole Array (LPDA) Antenna

This paper presents a new approach for design of the log-periodic dipole array antenna (LPDA) based on using of different design parameters in the LPDA elements to control the antenna behavior. In the proposed procedure, the design parameters can control the value of forward gain over the operating frequency range, and also adjust the gain flatness. Furthermore, this design procedure can decrea...

Leakage Properties of Stub-Loaded Ridge-Rectangular Waveguides

1. Introduction A leaky-wave line-source antenna is basically an open waveguide that supports a leaky mode (instead of a bound mode) and that therefore radiates all along its length. For use at millimeter wavelengths, various novel leaky-wave antennas were proposed, analyzed, and measured based on some low loss open waveguide designed specifically. Since these waveguides are already open, a phy...