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Asymmetrical trough waveguide antennas

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2 Author(s)
Rotman, W. ; H.G. Hanscom Field, Bedford, MA, USA ; Oliner, A.A.

Line source radiators of the leaky wave type may be constructed readily with trough waveguide, which consists of a rectangular trough containing a symmetrically located center fin. Two types of such radiators are investigated: a continuously asymmetrical form suitable for near endfire radiation, and a periodically asymmetrical design permitting radiation through broadside. The propagation characteristics of the leaky wave on the continuously asymmetrical structure are determined theoretically by means of a transverse resonance procedure, and comparison is made with measured values. The influence of finite center fin thickness is also accounted for. Designs and radiation patterns are presented for a typical antenna of each type.

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Antennas and Propagation, IRE Transactions on  (Volume:7 ,  Issue: 2 )