Radiofrequency filter device structure, formation method and mobile terminal
A technology of radio frequency filtering and device structure, applied in the field of filters, can solve problems such as unsolvable problems, no mention of filter structure settings, etc.
Inactive Publication Date: 2014-12-10
PHICOMM (SHANGHAI) CO LTD
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Problems solved by technology
The specific structural setting of the filter is not mentioned in the above technical solution, which cannot solve the problems existing in the prior art
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[0081] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0082] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0083] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0084] Inside the existing mobile terminal, the filter of the radio frequency part is usually welded on the surf...
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The invention discloses a radiofrequency filter device structure, a formation method and a mobile terminal, and belongs to the technical field of filters. The structure is arranged between at least two metal layers in a PCB. The structure comprises a top layer, a bottom layer and through holes, and divided by the plurality of through holes into at least one resonant cavity. The formation method comprises the following steps that: the structure above is formed in the PCB, the input port of the structure is connected with an input microstrip line through a strip-shaped signal input line and a connection through hole so as to form a signal input channel, the output port is connected with an output microstrip line through a strip-shaped signal output line and a connection through hole so as to form a signal output channel. The technical scheme above has the following beneficial effects that: a component bonding pad space on the surface of the PCB is saved, and the production cost of components can be reduced; routing can also be carried out on the inner layer of the PCB without generating any radiofrequency interface, thus effectively utilizing the space of the inner layer of the board, and alleviating the situation of a tense surface layout space.
Description
technical field [0001] The present invention relates to the technical field of filters, in particular to a structure and a forming method of a radio frequency filter device and a mobile terminal. Background technique [0002] In the radio frequency part inside the existing mobile terminal, the design of the filter is essential, and the filter is an important component to ensure the effective transmission and reception of wireless communication signals. [0003] On the PCB board inside the existing mobile terminal, the space left for the radio frequency components is becoming more and more limited, but the communication modes and frequency bands are more and more, and multiple different modes and different frequency bands need to be laid out in a small space. Components are undoubtedly a big challenge for RF engineers. Only by optimizing the layout of components, the effect is very limited. [0004] The current RF filters on mobile terminals basically use surface acoustic wa...
Claims
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IPC IPC(8): H01P1/208H01P11/00
Inventor 黄劲松
Owner PHICOMM (SHANGHAI) CO LTD