Indra Sistemas, S.A., 28850 Torrejon de Ardoz, Spain.
Signal Theory and Communications Department, Universidad Carlos III de Madrid, 28911 Leganes, Spain.
Sensors (Basel). 2021 Oct 2;21(19):6590. doi: 10.3390/s21196590.
This paper presents some considerations on the design of a novel antenna consisting of the combination of a transverse stubs (TS) array excited by Ridge Gap Waveguides (RGWs), as well as a discussion of the experimental results obtained from a prototype that was manufactured and measured. A combination of Continuous Transverse Stubs (CTSs) is used as the starting point. Subsequently, the CTSs are modified to include some metallic blockers that split each CTS into a combination (array) of shorter TSs. This is performed in order to excite each individual TS column using a different RGW; thus, ensuring a close to uniform field distribution in the transverse plane of the TS arrays. Hence, the directivity of the antenna is increased. As a series-feed configuration is considered, the antenna keeps a resonant behaviour, having a narrow-band response. A Corporate Feeding Network (CFN) using the aforementioned RGW technology placed in the same layer as the rest of the antenna is included in the design. The radiating area of the antenna is, finally, 5.88λ0×7.12λ0 with a simulated peak gain of 26.2 dBi and a Side Lobe Level (SLL) below -13 dB. A prototype is manufactured and tested. The simulated and measured radiation patterns maintain similar shapes to those of the simulations, with very similar angular widths in both main planes, although the frequency corresponding to the highest directivity changes to 31.8 GHz. A matching bandwidth of 517 MHz and a gain of 24.5 is, finally, achieved at that frequency.
本文提出了一种新型天线的设计考虑因素，该天线由横向短截线（TS）阵列与脊间隙波导（RGW）组合而成，并讨论了从制造和测量的原型中获得的实验结果。连续横向短截线（CTS）的组合被用作起点。随后，对 CTS 进行修改，在其中包含一些金属阻挡器，将每个 CTS 分成较短的 TS 组合（阵列）。这样做是为了使用不同的 RGW 来激励每个单独的 TS 列，从而确保在 TS 阵列的横向平面上实现接近均匀的场分布。因此，增加了天线的方向性。由于考虑了串联馈电配置，天线保持谐振行为，具有窄带响应。在设计中包含了使用上述 RGW 技术的共面馈电网络（CFN），放置在天线的其余部分所在的同一层。天线的辐射面积最终为 5.88λ0×7.12λ0，模拟峰值增益为 26.2 dBi，旁瓣电平（SLL）低于-13 dB。制造并测试了原型。模拟和测量的辐射图保持与模拟相似的形状，在两个主平面中具有非常相似的角宽度，尽管与最高方向性对应的频率变化为 31.8 GHz。最终，在该频率下实现了 517 MHz 的匹配带宽和 24.5 的增益。
