Antenna array of waveguide elements with dielectric phasing sections

Yuri G. Pasternak, Vladimir A. Pendiurin, D.K. Proskurin, K. S. Safonov
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Abstract

Background. The need to develop and continuously improve mobile and on–board high-speed satellite communication terminals, as well as satellite communication equipment with high secrecy of operation, emitting ultra-wideband signals, the spectral power density of which, measured at the input of receiving devices of radio monitoring complexes, should be significantly lower than the spectral power density of noise, is due to the following circumstances: ensuring reliable and high-quality communication military and civilian users; the development of the domestic element and technological base, import substitution; the need for rescue services in small-sized information transmission and reception systems; the need to develop satellite control systems for military and civilian equipment; the development of precision agriculture programs. An antenna array made of waveguide elements with dielectric phasing sections can serve as one such example. Aim. The model of the antenna element is considered, and its main characteristics are also given. A model of a linear antenna array consisting of 32 waveguide elements with phasing sections has been developed. Linear and flat antenna arrays based on a common-mode and equal-amplitude 1:32 power divider and antenna elements are considered. A model of a flat antenna array composed of 16 linear antenna arrays is also constructed and its main characteristics are given. Methods. The antenna element model is based on a circular waveguide with an internal diameter of 18 mm and a dielectric plate, the plane of which is oriented at an angle of 45° to the lines of force of the electric field intensity vector. The linear antenna array is powered by an equal amplitude and common-mode power divider, and the linear and flat antenna arrays are based on square waveguides with internal dimensions of 14×14 mm2 with beveled internal corners. Results. It is shown that the gain at a frequency of 10,95 GHz is 32,5 dB (normal) and 31,2 dB when the beam is deflected by ±37,5° in the angular plane. The gain at a frequency of 11,7 GHz is 33,8 dB (normal) and 32,5 dB when the beam is deflected by ±37,5° in the angular plane. With the maximum deviation of the main lobe from the normal, the level of the side lobes in the vertical increases to the level of -11,4 dB, which slightly exceeds the UBL with in-phase and equal amplitude field distribution in the headlight aperture (-13,2 dB). Conclusion. In the considered headlight design, the positioning of the main lobe of the radiation pattern in the azimuthal plane is carried out by mechanical rotation of the antenna system. The rejection of two–coordinate electronic scanning was chosen based on considerations of reducing phase shifters (or high-frequency switches) and reducing the cost of headlights.
带介质相位段的波导元件天线阵
背景。由于以下情况,需要开发和不断改进移动和星载高速卫星通信终端,以及具有高保密性的卫星通信设备,发射超宽带信号,其频谱功率密度在无线电监测综合体接收设备的输入端测量应明显低于噪声的频谱功率密度:确保军事和民用用户可靠和高质量的通信;发展国内要素和技术基础,进口替代;小型信息传输和接收系统的救援服务需要;发展军事和民用设备卫星控制系统的需要;精准农业计划的发展。由带介质相位段的波导元件组成的天线阵列就是这样一个例子。目标考虑天线元件的模型,并给出其主要特征。建立了一个由 32 个带相位段的波导元件组成的线性天线阵列模型。考虑了基于共模和等幅 1:32 功率分压器和天线元件的线性和平面天线阵列。还构建了一个由 16 个线性天线阵列组成的平面天线阵列模型,并给出了其主要特征。研究方法天线元件模型基于内径为 18 毫米的圆形波导和介质板,介质板的平面与电场强度矢量的力线成 45° 角。线性天线阵列由等幅共模功率分配器供电,线性和平面天线阵列基于内部尺寸为 14×14 平方毫米的方形波导,内角为斜面。结果结果表明,频率为 10.95 GHz 时的增益为 32.5 dB(正常),当波束在角度平面上偏转 ±37.5° 时的增益为 31.2 dB。频率为 11.7 GHz 时的增益为 33.8 dB(正常值),当光束在角度平面上偏转 ±37.5° 时为 32.5 dB。当主叶偏离法线达到最大值时,垂直方向上的边叶增益为-11.4 dB,略高于前照灯孔径内同相、等幅场分布的 UBL(-13.2 dB)。结论在所考虑的前照灯设计中,方位面上辐射图案主叶的定位是通过天线系统的机械旋转来实现的。基于减少移相器(或高频开关)和降低前照灯成本的考虑,选择了摒弃双坐标电子扫描。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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