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Vehicle Car Integrated 9dbi Antenna Reader Windshield Tag Card Rfid Long Range Rfid Card Reader Wiegand For Door Gate Controller - Access Control Card Reader - AliExpress
![GSM Antenna 9dBi High Gain RG174 2 M Extension Cable SMA Male 2G 3G 700-1800MHz Omni Direction with Magnetic Base | Walmart Canada GSM Antenna 9dBi High Gain RG174 2 M Extension Cable SMA Male 2G 3G 700-1800MHz Omni Direction with Magnetic Base | Walmart Canada](https://i5.walmartimages.com/asr/1ea2cccb-f20f-462a-81b7-dec76df41feb.c3627eef8b220465341f9c38774702b8.jpeg?odnHeight=2000&odnWidth=2000&odnBg=ffffff)
GSM Antenna 9dBi High Gain RG174 2 M Extension Cable SMA Male 2G 3G 700-1800MHz Omni Direction with Magnetic Base | Walmart Canada
![Question: how can someone achieve this kind of coverage? What kind of antenna, dbi need to reach that far from the purple point to the others is about 25 to 30 kilometers? : Question: how can someone achieve this kind of coverage? What kind of antenna, dbi need to reach that far from the purple point to the others is about 25 to 30 kilometers? :](https://preview.redd.it/xgl8e44h6c171.jpg?width=640&crop=smart&auto=webp&s=aaf127a73cc228ea52c8c106967ebde943c9e71a)
Question: how can someone achieve this kind of coverage? What kind of antenna, dbi need to reach that far from the purple point to the others is about 25 to 30 kilometers? :
![What is Antenna Gain? Is Higher Antenna Gain Better? - Edge Routers | Cellular Routers & Gateways | IoT Solutions | 5G | InHand Networks What is Antenna Gain? Is Higher Antenna Gain Better? - Edge Routers | Cellular Routers & Gateways | IoT Solutions | 5G | InHand Networks](https://www.inhandnetworks.com/upload/image/202108/30/0142278354.jpg)