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A versatile leaky-wave antenna based on stub-loaded rectangular waveguide .I. Theory

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5 Author(s)
Lampariello, P. ; Dept. of Electron. Eng., La Sapienza Univ. of Rome, Italy ; Frezza, F. ; Shigesawa, H. ; Tsuji, M.
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A new leaky-wave antenna is presented that possesses many desirable features and is suitable for application to both the millimeter-wave and microwave ranges. These desirable features, some of which are unusual, include a simple configuration, a wide flexibility in the range of available beamwidths, the ability to control the beamwidth and the direction of the beam essentially independently, and negligible cross polarization at all scan angles. The antenna structure consists of a parallel-plate stub guide of small height, less than a half wavelength, located off center on the top of rectangular waveguide. The beamwidth is easily controlled from very wide to very narrow by adjusting the stub width or location. The article presents the principle of operation and the theory, employing a new transverse equivalent network that is accurate, but also simple, so that it permits rapid and inexpensive numerical calculations

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Antennas and Propagation, IEEE Transactions on  (Volume:46 ,  Issue: 7 )