A compact linearly polarized quarter-mode substrate-integrated waveguide (QMSIW) dual-frequency millimeter-wave antenna is presented in this letter. The antenna has two unequal-sized quarter-mode parts of two square substrate-integrated waveguide (SIW) cavities for two operating bands. Each quarter can be tuned independently. The two quarters are realized within one layer of substrate laminate and are placed in a back-to-back configuration, sharing the same row of metalized vias, which makes the structure very simple and compact. For the demonstration, a QMSIW dual-frequency antenna simultaneously operating at 28 and 38 GHz bands was designed for fifth-generation (5G) applications. Compared with a traditional full-mode SIW slot antenna, our element design merits in an antenna footprint miniaturization of 53.5%. A four-element corporate-fed antenna array was also designed, fabricated, and measured. Good agreement between the measured and simulated results is obtained. The measured peak antenna gains of 9.5 dBi and 11.0 dBi are obtained for the lower and upper bands, respectively.

中文翻译：

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用于 5G 应用的紧凑型四分之一模基板集成波导双频毫米波天线阵列

在这封信中介绍了一种紧凑的线性极化四分之一模式基板集成波导 (QMSIW) 双频毫米波天线。该天线具有两个大小不等的四分之一模部件，它们由两个方形基板集成波导 (SIW) 腔组成，用于两个工作频段。每个季度都可以独立调整。这两个四分之一在一层基板层压板内实现，并以背对背配置放置，共享同一排金属化过孔，这使得结构非常简单和紧凑。在演示中，QMSIW 双频天线同时在 28 GHz 和 38 GHz 频段运行，专为第五代 (5G) 应用而设计。与传统的全模式 SIW 缝隙天线相比，我们的元件设计的优点是天线尺寸缩小了 53.5%。还设计、制造和测量了一个四单元公司馈电天线阵列。获得了测量结果和模拟结果之间的良好一致性。分别为低频段和高频段获得了 9.5 dBi 和 11.0 dBi 的测量峰值天线增益。