| 摘要 |
A dual-band antenna arrangement comprises an antenna (102,104) connected to a first feed conductor (106a) for signals in a first frequency band, a second feed conductor (106b) for signals in a second frequency band and a ground conductor (108). First and second transmission lines are formed by the ground conductor and a respective one of the feed conductors, and each of the transmission lines has its length optimised to be used in conjunction with a respective complementary circuit element thereby enabling a good match to the antenna to be achieved in each of the frequency bands. In one embodiment the antenna is a PIFA, and the lengths of the transmission lines are optimised by the addition of a linking conductor (910) between the feed and ground conductors, thereby enabling the use of larger shunt capacitances as the circuit elements, improving bandwidth and Q. |
