The Australian mobile market is mirroring that of the US in several important ways this year. There is a potentially disruptive broadband provider buying spectrum and looking to shake up the incumbents; calls for an incentive auction to open up broadcast airwaves for mobile operators; and arguments over how, and whether, the 3.5 GHz band should be shared. The new entrant is TPG, a fixed broadband provider which acquired 700 MHz spectrum in a recent auction of licences which were left on the table in a previous sale. The company has now announced that it has raised AU$320m through an institutional entitlement offer, to help fund the build-out of its mobile network. The bulk of the financing (AU$238m) came from…