The small-sizewide-bandantenna (103) furtherincludesa stubconductor (17) as animpedancematchingunit for matching the impedance between theradiationelementandthe powersupply means.
While we were never fans of external aerials, the T28 features what's probably the most attractive and distinguishable antennastub of any handset, ever.
It can also be removed and replaced with a new stub (if damaged) or with Ericsson's "high performance antenna IAT-10" for an even stronger signal in problem reception areas.