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A mechanically reconfigurable waveguide-slot single radiating element is presented. The tuning mechanism consists on three metallic screws introduced through the bottom wall of the feeding waveguide. The insertion length of the tuning screws and the distance to the slot are used to control the radiated signal as well as to maintain a good input matching response. Several prototypes with different...
This paper presents results of a study of the feasibility of Ka band slot arrays for an interferometric radar for the purpose of topographic mapping of the outer planets such as Jupiter and its moons. A small array is designed, built and tested.
Slotted-waveguide array antennas are attractive because of their low-loss characteristics in high frequencies. Several types of slotted arrays whose polarization angles are inclined to the waveguide axis have been reported. In this paper, we propose a new type of slot array antennas on a rectangular coaxial line for minimizing the waveguide width. As opposed to a conventional waveguide, there is no...
This paper presents the radiation characteristics of two-slot array antenna on a concentric sectoral cylindrical resonator excited by a coupling slot. The magnetic fields inside the sectoral cylindrical resonator for the first few modes are presented with sectoral angle of 60 degrees. It shows that the appropriate mode for a slot array antenna on a concentric sectoral cylindrical resonator is the...
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