mobile network gsm 2g 3g 4g 5g repeater tower

antena antenas antenna bandwidth blue broadcast broadcasting cell cellphone cellular communicate communication connect connection copenhagen coverage danish data denmark denmarknscandinavia digital equipment europe europen2021 frequency global gsm industrial industry internet metal mobile network operator phone radiation radio reapeter receive repeater resending signal sky station structure technology telecommunication telecommunications telephone tower towerninternet transceiver transmission transmit transmiter transmiting transmitter wave wireless