If you want to receive DVB-T or DVB-T2 Signals in your TV then It requires ordinary yagi antenna(Indoor or outdoordepending upon location of yoursite) as used in analogue TV. With the existing TV a Set Top Box is required. Butsome integrated Digital TV (iDTV) sets are available in market, which have in built set top box. If DVB-T2 broadcasting signals in Digital quality then you need a set-top box.
The following picture illustrates the reception method: