In this article, we present two efficient leaky-wave antennas (LWAs) with stable radiation pattern, operating at 60 GHz. Both antennas exhibit attractive properties such as significantly reduced beam-squint, low loss, low sidelobes, high directivity, and simple manufacturing. The beam-squint of conventional LWAs is reduced by refracting the leaked waves in a dispersive lens and the low sidelobe levels are achieved by tapering the leakage rate along the aperture. Since the antennas are implemented in groove gap waveguide technology, the losses are low. The two antennas are different in terms of their asymmetric/symmetric leakage tapering with respect to the broadside direction. Both designs are optimized for low sidelobes, but since symmetry is enforced in one, the resulting performance in terms of sidelobes is suboptimal. However, in the symmetric design, multiple stable beams can be obtained, simultaneously or independently. Twenty percent bandwidth is obtained with less than ±0.5° beam-squint. In this frequency range, the gain is stable at 17 and 15 dBi for the asymmetric and symmetric designs, respectively. The designs are intended for point-to-point links in mmWave communication networks where low losses, directive beams, and low sidelobes are expected to be key features.

中文翻译：

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用于毫米波点对点高吞吐量通信的低色散漏波天线

在本文中，我们介绍了两种工作频率为 60 GHz、辐射模式稳定的高效漏波天线 (LWA)。两种天线都表现出吸引人的特性，例如显着减少波束倾斜、低损耗、低旁瓣、高方向性和简单制造。通过在色散透镜中折射泄漏的波来减少传统 LWA 的光束倾斜，并且通过沿孔径逐渐减小泄漏率来实现低旁瓣水平。由于天线采用槽隙波导技术，因此损耗很低。两个天线的不同之处在于它们相对于宽边方向的非对称/对称泄漏锥形。两种设计都针对低旁瓣进行了优化，但由于在一种设计中强制执行对称性，因此在旁瓣方面的最终性能并不理想。然而，在对称设计中，可以同时或独立地获得多个稳定的光束。20% 的带宽是通过小于 ±0.5° 的光束斜视获得的。在此频率范围内，非对称和对称设计的增益分别稳定在 17 和 15 dBi。这些设计旨在用于毫米波通信网络中的点对点链路，其中预计低损耗、定向波束和低旁瓣是关键特性。