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Transverse electromagnetic mode dielectric filter, radio frequency module and base station

A dielectric filter and transverse electromagnetic mode technology, applied in the field of communication, can solve the problems of limited application scenarios, poor near-end suppression performance, and inability to apply filters, etc., and achieve the effect of wide use and good near-end suppression performance

Active Publication Date: 2017-11-24
SHANGHAI HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

[0003] However, the near-end rejection performance of the transverse electromagnetic mode dielectric filter provided by the existing technology is not good, so it cannot be applied to positions such as radio frequency front-ends or microwave antenna feeder front-ends that require high filter performance, and the application scenarios are limited.

Method used

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  • Transverse electromagnetic mode dielectric filter, radio frequency module and base station
  • Transverse electromagnetic mode dielectric filter, radio frequency module and base station
  • Transverse electromagnetic mode dielectric filter, radio frequency module and base station

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] Filters are an essential device in equipment such as base stations or radio frequency terminals. Due to the advantages in terms of cost and volume, dielectric filters can be used in places such as the receiving chain of base stations to filter radio frequency signals. Transverse electromagnetic mode dielectric filter is a kind of dielectric filter widely used.

[0023] However, due to the poor radio frequency performance index of the transverse electromagnetic mode dielectric mode filter, it cannot be used in places that require high filter performance, such as the front end of the radio frequency module, that is, between the transmitting antenna and the power amplifier. Among them, the radio frequency of the filter Performance indicator...

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Abstract

Embodiments of the present invention provide a transverse electromagnetic mode dielectric filter. A near-end rejection structure is disposed inside the filter. By flexibly designing a shape, a location, and a size of the near-end rejection structure, a transmission zero or zero cavity function is implemented, and a radio frequency signal on a high-frequency end or a low-frequency end out of a passband of the filter is rejected, thereby achieving good near-end rejection performance. The embodiments of the present invention further provide a radio frequency module and a base station.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communication, and in particular to a transverse electromagnetic mode dielectric filter, a radio frequency module and a base station. Background technique [0002] With the development of wireless communication technology, wireless communication equipment is increasingly pursuing miniaturization and low insertion loss. Compared with the traditional metal cavity filter, the dielectric filter has the advantages of small size, small insertion loss, high power withstand, and low cost. Transverse electromagnetic mode (TEM, transverse electromagnetic mode) dielectric filter is an important type of dielectric filter, which can be applied in wireless base stations, radio frequency terminals, radio frequency or microwave transceiver components and other equipment. [0003] However, the near-end suppression performance of the transverse electromagnetic mode dielectric filter provided by t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/201H04W88/08
CPCH01P1/2056
Inventor 古健张辉董利芳
Owner SHANGHAI HUAWEI TECH CO LTD
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