CN210201815U

CN210201815U - Tunable filter

Info

Publication number: CN210201815U
Application number: CN201921613044.6U
Authority: CN
Inventors: Jie Hu; 胡杰; Xiaolong Hu; 胡小龙; Lin Wang; 王淋
Original assignee: Shenzhen Global Test Service Co Ltd
Current assignee: Shenzhen Global Test Service Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-03-27
Anticipated expiration: 2029-09-25

Abstract

The utility model relates to an adjustable filter, including cavity, controller and a plurality of sub-filter of working at different frequency channels, it is a plurality of sub-filter locates in the cavity, be equipped with the moving part in the cavity, it is a plurality of sub-filter is mobile to be located on the moving part, adjustable filter still has the signal port and is used for input and output signal, and is a plurality of sub-filter with the signal port passes through the moving part is connected, the controller is used for selecting required frequency channel sub-filter, the controller with the moving part is connected for control this moving part is in remove in the cavity and connect with required sub-filter. In the working process, the application requirement of the wireless communication system on the multiband can be met only by connecting the adjustable filter without replacing the filter again.

Description

Tunable filter

Technical Field

The utility model relates to a radio frequency electromechanical system technical field, concretely relates to tunable filter.

Background

A filter is a core component of a communication system, and a band-stop filter (BSF) refers to a filter that passes most frequency components but attenuates certain ranges of frequency components to an extremely low level. In the present application of wireless communication systems, a filter plays a crucial role as one of the main components, and during the transmission process of signals, the filter performs necessary selection and filtering processing on the transmission signals through its own frequency characteristics to obtain the required frequency band signals, and simultaneously avoids the interference of signals of other frequency bands and external signals.

Along with wireless application range is wider and wider, and the frequency band of use is more and more, when testing to wireless product function in the earlier stage, often need to use different wave filters to satisfy the test demand to lead to the test procedure loaded down with trivial details, the test is more troublesome.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a tunable filter capable of dynamically setting a center frequency of a filter, so as to meet the application requirements of a wireless communication system for multiple frequency bands.

The utility model provides an adjustable filter, its includes cavity, controller and a plurality of sub-filter of working at different frequency channels, and is a plurality of sub-filter locates in the cavity, be equipped with the moving part in the cavity, it is a plurality of sub-filter is mobile to be located on the moving part, adjustable filter still has signal port and is used for input and output signal, and is a plurality of sub-filter with signal port passes through the moving part is connected, the controller is used for selecting required frequency channel sub-filter, the controller with the moving part is connected for control this moving part is in remove in the cavity with required sub-filter connects.

Preferably, the movable part comprises a movable bottom groove and a connector, the connector is movably arranged in the movable bottom groove, the plurality of sub-filters are arranged on the movable bottom groove, and the sub-filters are electrically connected with the signal port through the connector.

Preferably, the movable member further comprises a driving member, the driving member is respectively connected to the controller and the connector, and the driving member is configured to drive the connector to move to a desired sub-filter position to connect the desired sub-filter to the signal port.

Preferably, the tunable filter is provided with a control panel, the control panel is electrically connected to the controller, and the control panel is used for controlling the controller to select the sub-filters in the required frequency band and simultaneously disconnect the sub-filters which are not required.

Preferably, the control panel has a plurality of keys for selecting a sub-filter of a desired frequency band and controlling the function of the tunable filter.

Preferably, the control panel has a display screen, the display screen is connected to the signal port, and the display screen is used for displaying data of the tunable filter.

In the adjustable filter, the sub-filters working at different frequency bands are arranged in one cavity, the controller is arranged for selecting the sub-filters in the required frequency bands, and the controller controls the moving part to move in the cavity so as to be connected with the required sub-filters, so that the sub-filters in different working frequency bands can be selected according to different requirements in working or testing, the adjustable filter is only required to be connected in the working process, the filter does not need to be replaced again, the working steps are simplified, and the adjustable filter has a wide application prospect.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of the tunable filter according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a control panel structure of the tunable filter according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the following embodiments and drawings.

Referring to fig. 1, a tunable filter according to an embodiment of the present invention is shown, which includes a cavity 1, a controller, and a plurality of sub-filters 2 operating in different frequency bands. Preferably, a plurality of the sub-filters 2 are arranged in the cavity 1, a movable member is arranged in the cavity 1, the plurality of the sub-filters 2 are movably arranged on the movable member, the tunable filter has a signal port 3 for inputting and outputting signals, the plurality of the sub-filters 2 are connected with the signal port 3 through the movable member to output or receive signals, the controller is connected with the movable member, and the controller is used for selecting one of the sub-filters 2 working at a required frequency band as required and controlling the movable member to move in the cavity 1 to select and connect with the required sub-filter 2.

Preferably, the movable member includes a movable bottom groove 41 and a connector 42, the connector 42 is movably disposed in the movable bottom groove 41, the plurality of sub-filters 2 are disposed on the movable bottom groove 41, and the sub-filters 2 are electrically connected to the signal port 3 through the connector 42.

Preferably, the movable element further comprises a driving element, the driving element is respectively connected with the controller and the connector 42, and the driving element is used for driving the connector 42 to move to the position of the required sub-filter 2 so as to connect the required sub-filter 2 with the signal port 3 and disconnect the other sub-filters 2 at the same time.

Referring to fig. 2, the tunable filter has a control panel 5, the control panel 5 is electrically connected to the controller, and the control panel 5 is used for controlling the controller to select the sub-filters 2 in the required frequency band and simultaneously disconnect the sub-filters 2 not required.

Preferably, the control panel 5 has a plurality of keys 51, and the plurality of keys 51 are used for selecting the sub-filters 2 of the desired frequency band and controlling the functions of the tunable filter, such as setting parameters, such as the filter center frequency, of each of the sub-filters 2, controlling the tunable filter to start or end working, and the like.

Preferably, the control panel 5 has a display screen 52, the display screen 52 is connected to the signal port 3, and the display screen 52 is used for displaying data, operating status, and the like of the tunable filter.

Among the above-mentioned tunable filter, be equipped with a plurality of center frequency adjustable sub-filter 2 in cavity 1, control panel 5 control the required sub-filter 2 of controller selection is in order to satisfy different frequency channel demands and set up every the specific parameter value of sub-filter 2 makes tunable filter can satisfy multiple frequency channel demand, in concrete application, need not change the wave filter because of the frequency channel demand that adapts to the difference, simplifies work step, improves work efficiency. The adjustable filter can dynamically set the filtering center frequency, is suitable for the radio frequency front end of a receiving and transmitting system with various frequency band selection functions, meets the application requirements of a wireless communication system on multiple frequency bands, multiple functions and multiple modes, and has wide application prospects.

It should be noted that the present invention is not limited to the above embodiments, and other changes can be made by those skilled in the art according to the spirit of the present invention, and all the changes made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an adjustable filter, includes cavity, controller and a plurality of sub-filter of working at different frequency channels, its characterized in that, and is a plurality of sub-filter locates in the cavity, be equipped with the moving part in the cavity, it is a plurality of sub-filter is mobile to be located on the moving part, adjustable filter still has signal port and is used for input and output signal, and is a plurality of sub-filter with signal port passes through the moving part is connected, the controller is used for selecting required frequency channel sub-filter, the controller with the moving part is connected for control this moving part is in the cavity removes with required sub-filter connects.

2. The tunable filter according to claim 1, wherein the movable member includes a movable bottom groove and a connector, the connector is movably disposed in the movable bottom groove, the plurality of sub-filters are disposed in the movable bottom groove, and the sub-filters are electrically connected to the signal port through the connector.

3. A tunable filter according to claim 2, wherein the movable member further comprises an actuating member, the actuating member being connected to the controller and the connector, respectively, the actuating member being adapted to actuate the connector to move to a desired sub-filter position to connect a desired sub-filter to the signal port.

4. The tunable filter of claim 1, wherein the tunable filter is provided with a control panel, the control panel being electrically connected to the controller, the control panel being configured to control the controller to select the sub-filters of the desired frequency band while disconnecting the undesired sub-filters.

5. The tunable filter of claim 4, wherein the control panel has a plurality of keys for selecting a sub-filter of a desired frequency band and controlling the function of the tunable filter.

6. The tunable filter of claim 5, wherein the control panel has a display screen, the display screen being coupled to the signal port, the display screen being configured to display data for the tunable filter.