You rang? (remember Lurch from the Adams family?)
It isn't clear if the OP wants to design a receiver, a transmitter or a transceiver.
I will assume a receiver, but the answer will be different if this is a wrong assumption. It would also be useful to know if the antenna must be attached to the receiver in some convenient way (for example, if it is a portable receiver) or if the antenna can be separate. Roff's link is a good one for a separate antenna. For an attached antenna, the most common variety is a short monopole made from telescoping sections. The length is important both electrically and for mechanical convenience, but a practical length is usually about 0.2 wavelengths, or about 60 cm. Most commonly the base of such an antenna is directly connected to a high impedance (greater than 100 ohms input Z) preamplifier which provides some gain. This direct connection eliminates the concern about impedance matching through a transmission line. Using a high impedance amp like this also allows you to vary the length of the antenna quite a lot and still get reasonable performance.