Double frequency antenna

Abstract

The invention provides a double frequency antenna, which is used for receiving and sending electromagnetic wave signals. The double frequency antenna comprises an antenna body, a feed-in terminal and an earth terminal, wherein the antenna body comprises a matching part, a high frequency part and a low frequency part which are arranged in the same plane, the matching part is used for regulating impedance matching of the double frequency antenna and comprises a first connecting end and a second connecting end, the high frequency part is connected with the first connecting end of the matching part, a first groove is arranged between the high frequency part and the matching part, the low frequency part is connected with the second connecting end of the matching part, a second groove is arranged among the low frequency part, the matching part and the high frequency part, and the feed-in terminal and the earth terminal are both arranged on the matching part.

Description

technical field [0001] The invention relates to an antenna, in particular to a dual-frequency antenna. Background technique [0002] In mobile phones, personal digital assistants (Personal Digital Assistant, PDA) and other wireless communication devices, the antenna, as a component used to transmit and receive radio waves to transmit and exchange radio signals, is undoubtedly one of the most important components in wireless communication devices one. At present, wireless communication devices generally need to have the function of communicating in dual-frequency or more frequency bands, so their antenna devices generally use dual-frequency or multi-frequency antennas. [0003] see figure 1 , an existing dual-frequency antenna 80 includes a first radiating arm 82 and a second radiating arm 84, the first radiating arm 82 and the second radiating arm 84 are elongated structures, and when both Only when the lengths are a quarter of the wavelength corresponding to the signal t...

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Problems solved by technology

[0003] see figure 1 , an existing dual-frequency antenna 80 includes a first radiating arm 82 and a second radiating arm 84, the first radiating arm 82 and the second radiating arm 84 are elongated structures, and when both Only when the lengths are a quarter of the wavelength corresponding to the signal to be transmitted can it be used to receive signals of different frequency bands, such that the space occupied by the dual-frequency antenna 80 is too large, which is not conducive to reducing the portable electronic device. The size and development cost are also contrary to the development trend of today's portable electronic devices, which are light, thin and small

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