An S-/Ka- band shared-aperture antenna with frequency switching function for 5G applications is proposed in this letter. The proposed antenna comprises a thick patch containing a slotted cavity array (TPCSCA), S- band feeding structure, and coaxial cables for Ka- band. The TPCSCA is designed using 16 Ka -band slotted cavity antennas inside an S- band thick patch. Half of these Ka -band antenna elements radiate a +45° slanted polarization wave, whereas the others radiate a −45° SP wave. These elements are arranged in the form of a checkerboard and fed by coaxial cables. The S- band feeding structure is designed as a microstrip-fed slot and operates the TPCSCA as a $\text {T}{\text {M}_{010}}$ mode patch antenna in S- band. The measurement results show realized gains of 4.06–5.35 and 12.0–14.5 dBi over the S- band (3.44–3.56 GHz) and the Ka- band (27.54–28.46 GHz), respectively. The −3 dB beam steering coverage for the Ka -band is more than $ \pm $ 40° for both polarizations.

中文翻译：

---

5G 双 (秒-/K a-) 使用包含开槽腔阵列的厚贴片的频带天线

一个 S-/Ka- 这封信中提出了用于 5G 应用的具有频率切换功能的频段共享孔径天线。建议的天线包括一个厚贴片，其中包含一个开槽腔阵列（TPCSCA），S- 带式馈电结构和同轴电缆用于 K a- 乐队。TPCSCA 的设计使用了 16K a -带槽腔天线内部 S- 带厚补丁。其中一半K a -band 天线元件辐射 +45° 倾斜极化波，而其他天线元件辐射 -45° SP 波。这些元件以棋盘格的形式排列并由同轴电缆供电。这S- 频带馈电结构设计为微带馈电槽，并将 TPCSCA 作为 $\text {T}{\text {M}_{010}}$ 模式贴片天线 S- 乐队。测量结果显示实现的增益为 4.06–5.35 和 12.0–14.5 dBiS- 频带 (3.44–3.56 GHz) 和 K a- 频带（27.54–28.46 GHz），分别。-3 dB 波束控制覆盖范围K a -band 超过 $ \下午 $ 两种极化均为 40°。