Cellular modules are one of multiple components on a Printed Circuit Board (PCB) that enable computing and communications. One side of a cellular module is connected to antenna components for transmission and reception of data to/from the cellular network. 

Cellular Modules G2, G3, G4, 5G (all counties support) Cellular modules G3 (GSM), LTE, 5G SOM (Socket on Module) MCU + Cellular modules + WIFI/BLE/GPS SOM android system support 

Website: https://en.meigsmart.com/

RF Antennas, RF connectors and Coax cable assembly.

Website: https://www.tekfun.com.tw/category-2/