zzz Posted February 27, 2023 Report Share Posted February 27, 2023 Does anyone know what these antennas are used for? I see them all over town. Quote Link to comment Share on other sites More sharing options...
jbkalla Posted February 27, 2023 Report Share Posted February 27, 2023 Cell phone antennas, right? https://dgtlinfra.com/cell-tower-locations-4g-lte-5g-towers/ kmcdonaugh 1 Quote Link to comment Share on other sites More sharing options...
SteveShannon Posted February 27, 2023 Report Share Posted February 27, 2023 Yup, cell phone antennas. gortex2 and kmcdonaugh 2 Quote Link to comment Share on other sites More sharing options...
nokones Posted February 28, 2023 Report Share Posted February 28, 2023 What about a 700/800 MHz Smart Zone Trunking System? Wouldn't the said trunking system use an antenna array like that? Quote Link to comment Share on other sites More sharing options...
SteveShannon Posted February 28, 2023 Report Share Posted February 28, 2023 21 minutes ago, nokones said: What about a 700/800 MHz Smart Zone Trunking System? Wouldn't the said trunking system use an antenna array like that? I’m not sure. The trunking systems around here don’t use that kind of antenna. Quote Link to comment Share on other sites More sharing options...
KAF6045 Posted February 28, 2023 Report Share Posted February 28, 2023 I wouldn't expect trunking systems to need such. Cell phone towers perform triangulation (especially in the days before every phone had GPS capability) to optimize signals to phones, so having an array provides TDOA capability. Quote Link to comment Share on other sites More sharing options...
buttholejim Posted February 28, 2023 Report Share Posted February 28, 2023 36 minutes ago, nokones said: What about a 700/800 MHz Smart Zone Trunking System? Wouldn't the said trunking system use an antenna array like that? Trunked public safety (fire/police) systems typically use radio towers separate from cell network towers. But, there's some exceptions. Private networks using PTT radios that use cellular phone networks is one. Most police departments use a combination of radio technology in their cruisers. Conventional trunked/repeater systems and cellular networks (for data). I'm no expert in the subject, but I suspect the reason is for redundancy, reliability, and security. In Colorado for example, the state operates a statewide trunked radio system for all public safety organizations. Remember that the cell phone networks (and their equipment/towers) are privately owned companies. Where public safety trunked systems are are owned and operated by various government agencies. Quote Link to comment Share on other sites More sharing options...
kmcdonaugh Posted March 1, 2023 Report Share Posted March 1, 2023 Cell phone towers, specifically new 5G towers. Probably still has 4G as well. But 5G has much higher bandwidth, but does not have as much range Quote Link to comment Share on other sites More sharing options...
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