Zhongwu Yu

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In this paper, a broadband planar monopulse antenna of S band is presented. The wideband planar magic-T as the feed network and the multilayer antenna element as the radiation part have been designed. The proposed monopulse antenna can obtain one dimensional monopulse performance. The monopulse antenna considered here can realize sum-and-difference(More)
In this paper, a compact wideband planar 180° hybrid ring is presented. The proposed 180° hybrid ring is composed of a wideband branch-line coupler and a wideband 90° phase shifter. On the basis of the composite right/left-handed transmission line theory, one wideband 90° phase shifter can be realized by adopting lumped(More)
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