INTERNAL ANTENNA FOR TERRESTRIAL DIGITAL MULTIMEDIA BROADCASTING WITH RETRACTABLE ANTENNA

摘要

An internal antenna for terrestrial DMB(Digital Multimedia Broadcasting) is provided to improve a radiation characteristic by using the retractable antenna. An internal antenna(100) for terrestrial digital multimedia broadcasting includes a retractable antenna(110), a first matching circuit(120), and a second matching circuit(130). The internal antenna for the terrestrial digital multimedia broadcasting is incorporated in a terminal. The retractable antenna is connected to the internal antenna for the terrestrial digital multimedia broadcasting and receives a terrestrial digital multimedia broadcasting signal when the retractable antenna retracts to the terminal. The retractable is separated from the internal antenna and receives the terrestrial digital multimedia broadcasting signal when the retractable antenna extends to an outside of the terminal. The first matching circuit matches the internal antenna for the DMB antenna with the retractable antenna. The second matching circuit is connected to the retractable antenna and matches the retractable antenna.