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In this paper, a compact and broadband microstrip-fed antenna using the antisymmetric tapered probe with the triangular element is proposed. As compared with the antipodal Vivaldi antenna, the size can be reduced from one wavelength to 0.85 of a wavelength. Besides, the antenna has a broadband response in which the −10 dB bandwidth covers from 9.24 GHz to 18.14 GHz. Furthermore, the antenna maintains...
A compact and UWB microstrip-fed antenna using three monopoles is proposed. The wideband frequency response of the UWB antenna can be achieved by simply determining the resonance frequencies of the three monopoles. The simulated reflection coefficient is smaller than −10 dB from 3.2 to 10.6 GHz, corresponding to fractional bandwidth of 105.7%. Besides, the antenna shows an omni-directional radiation...
A coplanar-to-rectangular waveguide transition using a dipole slot antenna is proposed in this paper. The advantage of this transition is that no intermediate transition and vias are needed in this direct transition. Parameter studies of this transition demonstrate that a transition having a fractional bandwidth of 22.85%, for which the return loss is larger than 15 dB, is achieved in the X-band (8...
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