CMMB antenna and mobile multimedia broadcaster

Abstract

The invention provides a CMMB antenna. The CMMB antenna comprises a radiation unit. The radiation unit comprises a dielectric substrate, a first copper coating and a second copper coating respectively covering the dielectric substrate, a copper strip in the dielectric substrate, and a plurality of plated-through holes in the edge of the dielectric substrate and distributed at the two sides of the copper strip. A plurality of micro groove structures are arranged on the first copper coating. One end of the copper strip is provided with a feeding interface penetrating the dielectric substrate. The first copper layer and the second copper layer are electrically connected through the plated-through holes. The invention further provides a multimedia mobile broadcaster in which the CMMB antenna is applied. The CMMB antenna of the invention uses the microstrip transmission principle. The performance requirement of the CMMB antenna is realized through a simple structure. Combined with the utilized low-loss antenna dielectric substrate, the CMMB antenna arranged in the mobile multimedia broadcaster has an effect basically same with the effect of the existing external CMMB antenna.

Description

technical field [0001] The invention belongs to the field of communication equipment, and in particular relates to a CMMB antenna and a mobile multimedia broadcasting device using the antenna. Background technique [0002] With the development of wireless communication technology, wireless communication equipment has higher and higher requirements. In order to meet the communication requirements, the existing wireless routers basically use external antennas, which greatly limits the industrial design and mechanism design of products. In addition, the external antenna also needs to design adaptive impedance matching connectors and mechanical modules, which account for more than 90% of the cost of the entire antenna. [0003] As the radiating unit and receiving device of the final radio frequency signal, the working characteristics of the antenna will directly affect the working performance of the entire electronic system. The installation of the antenna not only needs to con...

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Problems solved by technology

The installation of the antenna not only needs to consider the shape of the antenna itself, but also needs to consider more electromagnetic radiation generated by the device where the antenna is located, especially the high-frequency work of the central processing unit. The signal will cause adverse effects, and even cause the antenna to fail to work normally. Therefore, the placement of the antenna in the electronic system needs to spend a lot of time to consider and verify

[0004] The CMMB antenna is usually placed outside the device to receive enough signals, which will take up a lot of space and affect the aesthetics of the CMMB device. Therefore, it is necessary to design an antenna that is placed inside the CMMB device and also able to meet its communication requirements

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