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Thread: Old CDMA antennas broadcasting HSPA and LTE???

  1. #1
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    Old CDMA antennas broadcasting HSPA and LTE???

    There’s an old Bell CDMA flagpole site on the south-east corner of Jane and Major Mac in Vaughan (GTA, ON). From what I can see, the only antenna sectors mounted to it are still the old ones from the CDMA days, yet according to the IC database (and my own experience having full B2 LTE signal on my Telus phone in the area including all surrounding indoor locations), the site also has B2 HSPA and B2 LTE. The pole itself is far too narrow/thin to have any equipment inside (i.e. it doesn’t look like a shrouded monopole). Is it even possible for Bell to allow their old CDMA sectors to broadcast HSPA and LTE? Could they do so by just installing new radios without new antennas?

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  2. #2
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    Sure, why not? Antennas are tuned for frequency only. They don’t care how the signal is encoded. There are design considerations to minimize interference though.

  3. #3
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    Hmmmm. Interesting, thanks. The antennas are tiny compared to other sites that have upgraded HSPA and LTE antennas. I wonder why they haven’t done the same thing for many of their hydro sites (where they have CDMA antennas mounted to hydro line towers)...they could easily install new radios in the base stations to get HSPA and LTE on those sites too but many (all?) are still just CDMA...

  4. #4
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    My guess would be interference / tuning issues. Odds are the old antennas are wide beam and would create issues

    Sent from my VS996 using HoFo mobile app

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    Those look like newer style antennas that support multiple bands/MIMO. CDMA antennas were thin. It could be they upgraded the antennas some time ago while still using them for CDMA.

    The equipment does not have to be near the antennas, it can be further away from the actual antennas.

    Sent from my Pixel 2 using HoFo mobile app

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