Built-in active digital mobile television antenna

Abstract

The invention relates to the technical field of mobile device antennae. The invention provides a digital mobile television antenna, comprising a multi-layer PCB (printed circuit board) substrate as well as a radiating unit and an active circuit unit which are arranged on the substrate, wherein the radiating unit comprises a plurality of metal radiating unit layers which are respectively arranged on different layers of the PCB substrate, at least one metal radiating unit layer and the active circuit unit are arranged in the same layer of the PCB substrate, and the metal radiating unit layers are respectively electrically connected by virtue of metalized through holes; and the active circuit unit comprises an antenna matching circuit and a low noise amplifier circuit and is electrically connected with any radiating unit by virtue of the metalized through hole. The antenna adopts a multi-layer PCB structure, the size of the antenna is small, the antenna is convenient to be integrated and built in, and the antenna is applicable to other common mobile communication terminal equipment; and compared with an external telescopic antenna, the service life of the antenna provided by the invention is long, and the antenna provided by the invention is convenient to use.

Description

technical field [0001] The invention relates to the technical field of mobile equipment antennas, in particular to a built-in active digital mobile TV antenna. Background technique [0002] Driven by the national "triple play" policy, domestic digital mobile TV will develop rapidly. According to China Broadcasting, the target number of CMMB mobile TV users in 2010 is 10 million, and the number of end users is expected to exceed 50 million in the next three years. As far as the coverage of the CMMB digital mobile TV network is concerned, the signal has been opened in 253 cities across the country, and it has been fully operational since January 28, 2010. After more than two years of network construction and market warm-up, CMMB mobile digital TV has become increasingly mature in terms of technology, content, service and business operation mode, which has greatly protected the interests of upstream and downstream manufacturers in the entire industry chain. Emerging Markets. ...

AI Technical Summary

Problems solved by technology

On the one hand, compared with the built-in antennas of high-frequency bands such as GSM, the size of the antenna is obviously larger, but the antenna with a larger size is not suitable for built-in mobile communication terminal equipment; on the other hand, the frequency band of the antenna is required to be wider, generally It is difficult for the built-in antenna to meet such a large bandwidth requirement

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