CN210326068U - Cavity filter with working frequency capable of being adjusted rapidly - Google Patents
Cavity filter with working frequency capable of being adjusted rapidly Download PDFInfo
- Publication number
- CN210326068U CN210326068U CN201921847709.XU CN201921847709U CN210326068U CN 210326068 U CN210326068 U CN 210326068U CN 201921847709 U CN201921847709 U CN 201921847709U CN 210326068 U CN210326068 U CN 210326068U
- Authority
- CN
- China
- Prior art keywords
- controllable multi
- way switch
- cavity filter
- switch
- input end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model discloses a quick adjustable cavity filter of operating frequency relates to wave filter technical field, include: the input end of a normally open contact is connected with an alternating current power supply line, the input end of the normally closed contact is connected with a storage battery power supply line, and the output end of the normally closed contact is respectively connected with the power supply end of the first controllable multi-way switch and the power supply end of the second controllable multi-way switch; one input end of the first controllable multi-path switch is connected with a radio frequency input signal, and the multi-path output end of the first controllable multi-path switch is connected with the input end of the cavity filter component; the input ends of the plurality of paths of controllable multi-path switches are connected with the output end of the cavity filter assembly, and one output end of the second controllable multi-path switch outputs a radio frequency output signal; and the control circuit is respectively connected with the first controllable multi-way switch and the second controllable multi-way switch and is used for controlling the gating channels of the first controllable multi-way switch and the second controllable multi-way switch. The utility model has the advantages of but communication transmission reliability is high, operating frequency quick adjustment, outband suppression degree height/interference killing feature is strong, bearing power is big.
Description
Technical Field
The utility model relates to a wave filter technical field, concretely relates to quick adjustable cavity filter of operating frequency.
Background
A filter is a typical frequency selection device, which can effectively suppress unwanted signals from passing through the filter, and only wanted signals pass through the filter. The main function of the method is to solve the interference problem between wireless communication systems with different frequency bands and different standards. The performance of the filter directly affects the quality of the wireless communication system, and the filter becomes more and more important with the more and more complex electromagnetic environment.
The filter generally comprises: the working frequency of the electrically tuned filter can be adjusted, but the power of the electrically tuned filter is small and can only reach the watt level generally. The cavity filter adopts a filter with a resonant cavity structure, and one cavity can be equivalent to an inductor parallel capacitor, so that a resonant level is formed, and the filtering function is realized.
Compared with other microwave filters, the cavity filter has the advantages of firm structure, large bearing power, flat in-band amplitude-frequency characteristic, small insertion loss, high out-of-band rejection degree/strong anti-interference capability, wide working temperature range, stable and reliable performance in the full temperature range and the like. However, the cavity filter can only work in a designed working frequency range, and cannot be applied to an application scenario in which the working frequency is rapidly adjusted.
In order to overcome the above drawbacks, some devices capable of adjusting the working frequency band of the cavity filter are disclosed in the prior art, for example, chinese patent CN202855875U discloses an integrated microwave band switch filter, which includes a main cavity, wherein a first groove and a second groove for installing a first single-pole multi-throw switch and a second single-pole multi-throw switch are respectively formed at the left end and the right end of the main cavity, and a third groove for installing a cavity filter group is formed at the central position of the main cavity. Different cavity filters are communicated through the control of the single-pole multi-throw switch so as to achieve the purpose of adjusting the working frequency. However, the single-pole multi-throw switch of the switch filter cannot normally work when the working power supply is suddenly powered off due to faults, so that signals are interrupted, and the defect of low communication transmission reliability exists.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the present invention provides a technical problem to be solved is that the communication transmission reliability of the frequency-adjustable cavity filter in the prior art is low.
Therefore, the utility model discloses a quick adjustable cavity filter of operating frequency, include: the cavity filter comprises a normally closed switch, a first controllable multi-way switch, a cavity filter assembly, a second controllable multi-way switch and a control circuit;
the input end of a normally open contact of the normally closed switch is connected with an alternating current power supply line, the input end of the normally closed contact is connected with a storage battery power supply line, and the output end of the normally closed contact is respectively connected with the power supply end of the first controllable multi-way switch and the power supply end of the second controllable multi-way switch;
one input end of the first controllable multi-path switch is connected with a radio frequency input signal, and the multi-path output end of the first controllable multi-path switch is connected with the input end of the cavity filter component;
the multi-path input end of the second controllable multi-path switch is connected with the output end of the cavity filter assembly, and one output end of the second controllable multi-path switch outputs a radio frequency output signal;
the control circuit is respectively connected with the first controllable multi-way switch and the second controllable multi-way switch and is used for controlling the gating channels of the first controllable multi-way switch and the second controllable multi-way switch.
Preferably, the first controllable multi-way switch is a single-pole N-throw switch.
Preferably, the second controllable multi-way switch is a single-pole N-throw switch.
Preferably, the cavity filter assembly comprises N cavity filters;
the input end of each cavity filter is connected with one output end of the first controllable multi-way switch, and the output end of each cavity filter is connected with one input end of the second controllable multi-way switch.
Preferably, the cavity filter assembly comprises N-1 cavity filters and 1 through conductor;
the input end of each cavity filter is connected with one output end of the first controllable multi-way switch, and the output end of each cavity filter is connected with one input end of the second controllable multi-way switch;
one end of the through wire is connected with one output end of the first controllable multi-way switch, and the other end of the through wire is connected with one input end of the second controllable multi-way switch.
Preferably, the control circuit comprises an FPGA logic chip.
The technical scheme of the embodiment of the utility model, following advantage has:
1. the embodiment of the utility model provides a quick adjustable cavity filter of operating frequency through setting up the normally closed switch, has a power failure suddenly or unexpected under the power failure condition at the commercial power, through the battery powered to also can normally work, avoid the interrupt of communication, communication transmission reliability is high.
2. The embodiment of the utility model provides a quick adjustable cavity filter of operating frequency switches through the gating that realizes multichannel cavity filter, has realized cavity filter operating frequency fast speed adjusting, has improved the governing speed greatly, can realize microsecond level frequency switch, can satisfy operating frequency fast speed adjusting, the outband suppression degree is high/the interference killing feature is strong, power is born is big, the application scene that the reliability is high.
3. The embodiment of the utility model provides a quick adjustable cavity filter of operating frequency through set up direct route all the way in cavity filter subassembly, works as under the circumstances such as cavity filter trouble/work malfunction, all can gate direct wire to also can normally work, avoid the interrupt of communication, further improved communication transmission's reliability. In addition, the flexibility of frequency allocation is also improved through gating switching and through switching of the multipath cavity filter.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a specific example of a cavity filter with a fast adjustable operating frequency according to an embodiment of the present invention.
Reference numerals: 01-a normally closed switch, 02-a first controllable multi-way switch, 03-a cavity filter component, 04-a second controllable multi-way switch and 05-a control circuit.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In describing the present invention, it is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and/or "comprising," when used in this specification, are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The term "and/or" includes any and all combinations of one or more of the associated listed items. The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "connected" and "coupled" are to be construed broadly and may, for example, be mechanical or electrical; the two elements can be directly connected, indirectly connected through an intermediate medium, or communicated with each other inside; either a wireless or a wired connection. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is to be understood that the term controller/control circuitry refers to a hardware device that includes a memory and a processor. The memory is configured as a memory module and the processor is specifically configured to execute the processes stored in the memory module to thereby execute one or more processes.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Examples
This embodiment provides a quick adjustable cavity filter of operating frequency, can be applied to the sending end and the receiving end of equipment such as radio communication, radar, as shown in fig. 1, include: the device comprises a normally closed switch 01, a first controllable multi-way switch 02, a cavity filter component 03, a second controllable multi-way switch 04 and a control circuit 05.
The normally open contact input end of the normally closed switch 01 is connected with an alternating current power supply line, the normally closed contact input end is connected with a storage battery power supply line, and the output end is respectively connected with the power supply end of the first controllable multi-way switch 02 and the power supply end of the second controllable multi-way switch 04. Under the condition that the commercial power alternating-current power supply line supplies power normally, the normally open contact of the normally closed switch 01 is closed, and the first controllable multi-way switch 02 and the second controllable multi-way switch 04 supply power normally. Under the condition that the mains supply is suddenly powered off or is powered off accidentally, the normally closed contact of the normally closed switch 01 is closed, and the first controllable multi-way switch 02 and the second controllable multi-way switch 04 are powered by the storage battery, so that the intelligent power supply can normally work, communication interruption is avoided, and communication transmission reliability is high.
One input end of the first controllable multi-way switch 02 is connected with a radio frequency input signal, and the multi-way output end is connected with the input end of the cavity filter component 03.
The multi-path input end of the second controllable multi-path switch 04 is connected with the output end of the cavity filter component 03, and one output end outputs a radio frequency output signal.
The control circuit 05 is connected to the first controllable multi-way switch 02 and the second controllable multi-way switch 04, respectively, and is configured to control the gating channels of the first controllable multi-way switch 02 and the second controllable multi-way switch 04. Preferably, the control circuit 05 comprises an FPGA logic chip. The control and conduction of the cavity filter component 03 are realized through an FPGA logic chip.
Preferably, the first controllable multi-way switch 02 is a single-pole N-throw switch. The second controllable multi-way switch 04 is a single-pole N-throw switch.
In a preferred mode, the cavity filter assembly 03 includes N cavity filters; the input end of each cavity filter is connected with one output end of the first controllable multi-way switch 02, and the output end of each cavity filter is connected with one input end of the second controllable multi-way switch 04. Each cavity filter is different, mainly the working frequency band is not completely the same, can design according to the demand. The N cavity filter frequency bands may overlap. Through realizing the gating switching of the multipath cavity filter, the working frequency of the cavity filter is quickly adjusted, the adjusting speed is greatly improved, microsecond-level frequency switching can be realized, and the application scenes of quick adjustment of the working frequency, high out-of-band rejection degree/strong anti-interference capability, high bearing power and high reliability can be met.
In another preferred mode, the cavity filter assembly 03 comprises N-1 cavity filters and 1 through wire; the input end of each cavity filter is connected with one output end of the first controllable multi-way switch 02, and the output end of each cavity filter is connected with one input end of the second controllable multi-way switch 04; one end of the through conductor is connected with one output end of the first controllable multi-way switch 02, and the other end of the through conductor is connected with one input end of the second controllable multi-way switch 04. By arranging one path of through passage in the cavity filter component 03, the through wire can be gated under the conditions of cavity filter failure/working disorder and the like, so that the cavity filter can work normally, communication interruption is avoided, and the reliability of communication transmission is further improved. In addition, the flexibility of frequency allocation is also improved through gating switching and through switching of the multipath cavity filter.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (6)
1. A cavity filter with a rapidly adjustable working frequency is characterized by comprising: the device comprises a normally closed switch (01), a first controllable multi-way switch (02), a cavity filter component (03), a second controllable multi-way switch (04) and a control circuit (05);
the input end of a normally open contact of the normally closed switch (01) is connected with an alternating current power supply line, the input end of the normally closed contact is connected with a storage battery power supply line, and the output end of the normally closed contact is respectively connected with the power supply end of the first controllable multi-way switch (02) and the power supply end of the second controllable multi-way switch (04);
one input end of the first controllable multi-way switch (02) is connected with a radio frequency input signal, and the multi-way output end of the first controllable multi-way switch is connected with the input end of the cavity filter component (03);
the multi-channel input end of the second controllable multi-channel switch (04) is connected with the output end of the cavity filter component (03), and one output end outputs a radio frequency output signal;
the control circuit (05) is respectively connected with the first controllable multi-way switch (02) and the second controllable multi-way switch (04) and is used for controlling gating channels of the first controllable multi-way switch (02) and the second controllable multi-way switch (04).
2. The cavity filter according to claim 1, wherein the first controllable multi-way switch (02) is a single-pole N-throw switch.
3. The cavity filter according to claim 2, wherein the second controllable multi-way switch (04) is a single-pole N-throw switch.
4. The cavity filter according to claim 3, wherein the cavity filter assembly (03) comprises N cavity filters;
the input end of each cavity filter is connected with one output end of the first controllable multi-way switch (02), and the output end of each cavity filter is connected with one input end of the second controllable multi-way switch (04).
5. The cavity filter according to claim 3, wherein the cavity filter assembly (03) comprises N-1 cavity filters and 1 through conductor;
the input end of each cavity filter is connected with one output end of the first controllable multi-way switch (02), and the output end of each cavity filter is connected with one input end of the second controllable multi-way switch (04);
one end of the straight-through lead is connected with one output end of the first controllable multi-way switch (02), and the other end of the straight-through lead is connected with one input end of the second controllable multi-way switch (04).
6. The cavity filter according to claim 3, wherein the control circuit (05) comprises an FPGA logic chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921847709.XU CN210326068U (en) | 2019-10-30 | 2019-10-30 | Cavity filter with working frequency capable of being adjusted rapidly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921847709.XU CN210326068U (en) | 2019-10-30 | 2019-10-30 | Cavity filter with working frequency capable of being adjusted rapidly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210326068U true CN210326068U (en) | 2020-04-14 |
Family
ID=70134656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921847709.XU Active CN210326068U (en) | 2019-10-30 | 2019-10-30 | Cavity filter with working frequency capable of being adjusted rapidly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210326068U (en) |
-
2019
- 2019-10-30 CN CN201921847709.XU patent/CN210326068U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5668029B2 (en) | Radio circuit, frequency pair determination method | |
| CN110011721A (en) | Power amplifying device and power amplification system in satellite communication system | |
| CN211830765U (en) | Radio frequency structure and electronic equipment | |
| CN210326068U (en) | Cavity filter with working frequency capable of being adjusted rapidly | |
| EP2991223B1 (en) | Harmonic suppression system | |
| AU2007351736A1 (en) | Method and device for signal combination and different-system same-band antenna-sharing system | |
| CN112737628A (en) | Radio frequency circuit and electronic device | |
| US20200235760A1 (en) | Radio frequency module and communication device | |
| KR20160062833A (en) | A Combiner for Use in a Multiband Base Station System and a Method for Controlling the Combiner | |
| KR20130070144A (en) | Combiner and multi-band base station system using the combiner | |
| EP3091666B1 (en) | Portable electronic device with circuit for antenna frequency switching | |
| CN210839556U (en) | Electronic equipment | |
| CN114097177B (en) | Circuit arrangement for transmitting radio signals and method for operating a circuit arrangement | |
| CN103095361A (en) | Time division duplex tower mounted amplifier | |
| CN212257637U (en) | Band-pass filter based on high-frequency communication | |
| CN110416675B (en) | High-low pass combiner | |
| CN114301492A (en) | Multi-path selection device, control method, radio frequency system and wireless communication equipment | |
| CN208539898U (en) | The switching device of module reuse in TDD system | |
| RU2784458C1 (en) | Radio-frequency input circuit and mobile terminal | |
| CN219420759U (en) | Antenna tuning circuit and terminal equipment | |
| CN216649684U (en) | Multi-channel communication system simplification control circuit | |
| CN219875719U (en) | Multi-system multiplexing signal shaping device | |
| CN213484843U (en) | Radio frequency signal frequency converter | |
| CN218586314U (en) | Radio frequency coupler | |
| CN214544264U (en) | High-power electronic transceiving switch circuit and switch module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |