TV coverage could be realised would be to rebroadcast the DVB T or ATSC multiplex via local cellular transmitters or via inbuilding repeaters. Alternatively, TV signals could be piped down from a roof-top aerial and rebroadcast from an indoor femtocell. However, even with signal rebroadcasting, portable receivers would benefit from having improved sensitivity and selectivity. Several factors now make this a more plausible scenario. Cellular base-station transmitters in the 700-MHz (US) and 800-MHz (European) UHF band need to be sufficiently linear to transmit the cellular OFDM signal with minimal dis- tortion. It is therefore not unrealistic to consider adding ATSC or DVB T broadcast to the TX chain. Cellular handsets and portable lap tops will have to add 700- and 800-MHz UHF LTE TX/RX functionality. It is therefore not unrealistic to consider adding DVB T and ATSC receive functionality to these devices. Indeed, it could be argued that extended RF connectivity might be a precondition of mass-market adoption for the emerging crossover form factor devices that combine traditional lap top, net book and smart-phone functionality, of which the iPad is one example. However, there are some practical RF design and performance issues that have to addressed before these products can be realised. Substantially these are determined by the characteristics of the UHF band and the need for these devices to provide cellular connectivity in the 850/900, 1800, 1900, 2100 and 2600 MHz bands. So, for example, it might seem sensible to have an ATSC and DVB T receiver that worked across the whole UHF band from 470 to 862 MHz and a transceiver that could cover the cellular bands from the bottom of the US 700 MHz band at 698 MHz to the top of the proposed European UHF cellular band at 862 MHz. In practice, such a device, even with adaptive matching and tracking filters, would have unacceptable sensitivity and selectivity on the RX path, poor transmission efficiency on the TX path and the dynamic range needed would incur an unacceptable