Abstract
A millimeter-wave (mm-wave) substrate integrated waveguide (SIW)-fed endfire antenna is proposed by using double-faced multiple dielectric patch (DFMDP) resonator, named SIW-fed endfire DFMDP antenna. The DFMDP resonator consists of DFMDPs and the extend substrate of the SIW, where DFMDPs are a number of dielectric patches on both surfaces of the extend substrate of the SIW. The endfire radiation is supported by the DFMDP resonator as well as the open-ended SIW. Multiple TE <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">y</sup> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">n</sub> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> modes and low quality factor can be found in the DFMDP resonator to obtain wideband operation. Four antennas with different number of DFMDPs are studied and compared. The antenna using 3 × 3 DFMDPs is preferred considering both the antenna performance and process capability. A prototype operating at 33.5 GHz is designed, analyzed, and demonstrated. The measured results exhibit the 10 dB impedance matching bandwidth of 19.19 GHz (23.97-43.16 GHz) or 57.14% and the average gain of 9.45 dBi.
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