Zhou Ivan, Pradell Lluís, Villegas José Maria, Vidal Neus, Albert Miquel, Jofre Lluís, Romeu Jordi
School of Telecommunication Engineering, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain.
Department of Electronics and Biomedical Engineering, Universitat de Barcelona, 08028 Barcelona, Spain.
Sensors (Basel). 2022 Jul 16;22(14):5329. doi: 10.3390/s22145329.
A 3D-printed phased array consisting of four H-Sectorial horn antennas of 200 g weight with an ultra-wideband rectangular-waveguide-to-microstrip-line transition operating over the whole LMDS and K bands (24.25-29.5 GHz) is presented. The transition is based on exciting three overlapped transversal patches that radiate into the waveguide. The transition provides very low insertion losses, ranging from 0.30 dB to 0.67 dB over the whole band of operation (23.5-30.4 GHz). The measured fractional bandwidth of the phased array including the transition was 20.8% (24.75-30.3 GHz). The antenna was measured for six different scanning angles corresponding to six different progressive phases α, ranging from 0° to 140° at the central frequency band of operation of 26.5 GHz. The maximum gain was found in the broadside direction α = 0°, with 15.2 dB and efficiency η = 78.5%, while the minimum was found for α = 140°, with 13.7 dB and η = 91.2%.
本文介绍了一种3D打印相控阵，它由四个重量为200克的H扇形喇叭天线组成，带有一个超宽带矩形波导到微带线的过渡结构，工作在整个本地多点分配业务（LMDS）和K波段（24.25 - 29.5吉赫兹）。该过渡结构基于激励三个重叠的横向贴片，这些贴片向波导内辐射。在整个工作频段（23.5 - 30.4吉赫兹）内，该过渡结构的插入损耗非常低，范围从0.30分贝到0.67分贝。包括该过渡结构在内的相控阵的实测分数带宽为20.8%（24.75 - 30.3吉赫兹）。在中心工作频段26.5吉赫兹下，对该天线在对应六个不同渐进相位α（范围从0°到140°）的六个不同扫描角度进行了测量。在α = 0°的宽边方向发现最大增益，为15.2分贝且效率η = 78.5%，而在α = 140°时发现最小增益，为13.7分贝且η = 91.2%。
