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2PCS Maple 5.8Ghz 21dB 17dB High Gain Antenna Directional Patch Antenna with SMA Connector for SIYI HM30 Drone airplane RC Model _ - AliExpress Mobile
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5.8GHz 14dBi Directional Patch Antenna (SMA)
Figure 2 from Design of a quad element patch antenna at 5.8 GHz | Semantic Scholar