CN105720333A - Filter - Google Patents
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- CN105720333A CN105720333A CN201610056890.7A CN201610056890A CN105720333A CN 105720333 A CN105720333 A CN 105720333A CN 201610056890 A CN201610056890 A CN 201610056890A CN 105720333 A CN105720333 A CN 105720333A
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- minor matters
- matters line
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- wave filter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
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Abstract
The invention provides a filter, which comprises a main transmission line and a branch structure, wherein the main transmission line is made of a conductive material; the branch structure is used for filtering signal components of which the preset frequency points f are within a preset frequency range from signals transmitted in the main transmission line and comprises a first branch line, a second branch line and a third branch line; the first branch line is made of the conductive material and comprises at least two end parts; one end part is arranged on the main transmission line; the second branch line is made of the conductive material and is arranged in striped extension; one end part of the second branch line is arranged on the first branch line and the other end part is grounded; the length L1 of the second branch line is determined according to the preset frequency range; the third branch line is made of the conductive material and is arranged in striped extension; one end part of the third branch line is arranged on the first branch line and the other end part is suspended; and the sum of the length L2 of the third branch line and the length L1 is determined according to the preset frequency, so that steep roll-off characteristics can be easily achieved.
Description
Technical field
The present invention relates to the communications field, and more particularly, to wave filter.
Background technology
Wave filter is a kind of device realizing signal behavior, and basic function is to allow signal in passband, i.e. passing through for the least possible loss of signal that this equipment is useful；Allow the signal outside passband, namely filter out the signal that this equipment is useless is as much as possible.
Desirable wave filter should have a completely flat passband, in passband, such as there is no gain or decay, and all frequencies (that is, stopband) are all fallen by complete attenuation outside passband, additionally, it is desirable that the conversion of passband and stopband completes in minimum frequency range.But, actually and be absent from desirable band filter, namely all frequency complete attenuations outside expected frequency range can not be fallen by wave filter, but does not have segregate scope particularly in also having one to be attenuated outside desired passband, and this is commonly referred to the roll-off characteristic of wave filter.
Generally, the design of wave filter needs as far as possible guarantee to roll-off scope more narrow more good (in other words, roll-off characteristic is more precipitous more good), so that the performance of wave filter and design are more nearly.
Accordingly, it is desirable to provide a kind of wave filter, it is possible to it is easily achieved precipitous roll-off characteristic.
Summary of the invention
The embodiment of the present invention provides a kind of wave filter, it is possible to be easily achieved precipitous roll-off characteristic.
The wave filter of the embodiment of the present invention includes: main transmission line a, is constructed from a material that be electrically conducting；Minor matters structure b, for filtering the component of signal including presetting in the default frequency domain of frequency f from the signal of transmission among this main transmission line a, including: the first minor matters line b1, it is constructed from a material that be electrically conducting, including at least two end, one of them end b1-1It is arranged on this main transmission line a；Second minor matters line b2, it is constructed from a material that be electrically conducting, extends configuration, an end b in banding2-1It is arranged in these first minor matters line b1On, another end b2-2Ground connection configures, wherein, and these second minor matters line b2Length L1 determine according to this default frequency domain；3rd minor matters line b3, it is constructed from a material that be electrically conducting, extends configuration, an end b in banding3-1It is arranged in these first minor matters line b1On, another end b3-2Unsettled configuration；Wherein, the 3rd minor matters line b3Length L2 and this length L1 sum be that the wavelength X corresponding to this predeterminated frequency f is determined.
Wave filter according to embodiments of the present invention, makes the second minor matters line b in minor matters structure b2One end ground connection, make the 3rd minor matters line b3One end unsettled, it is possible to by the second minor matters line b2With the 3rd minor matters line b3Inductance characteristic and capacitance characteristic are provided such that it is able to in the signal of transmission in main transmission line a with the 3rd minor matters line b3Length L2 and the second minor matters line b2The corresponding default frequency domain of length L1 sum in component of signal decay, by changing the second minor matters line b2Length, it is possible to be easily achieved the change to this default frequency domain, i.e. can be easy to realize the control of the frequency range to the conversion for completing passband and stopband, thus, it is possible to be easily achieved precipitous roll-off characteristic.
In the first implementation of the present invention, these second minor matters line b2With the 3rd minor matters line b3The specifically different piece of same strip-shaped conductive material c.
Wave filter according to the first implementation, by being made up of the second minor matters line b same strip-shaped conductive material2With the 3rd minor matters line b3, it is possible to increase the machinability of the wave filter of the present invention and formation efficiency.
In conjunction with above-mentioned implementation, in the second implementation of the present invention, this strip-shaped conductive material c include for these first minor matters line b1The junction point connected, this strip-shaped conductive material c by this junction point position changeable on the length direction of this strip-shaped conductive material c more in the way of, with these first minor matters line b1Connect.
Wave filter according to the second implementation, by making this strip-shaped conductive material c and these first minor matters line b1Junction point position on the length direction of this strip-shaped conductive material c can arbitrarily change, it is capable of tackling the different requirements for completing passband and the frequency range of the conversion of stopband flexibly by same wave filter, improves the practicality of the wave filter of the present invention further.
In conjunction with above-mentioned implementation, in the third implementation of the present invention, the first minor matters line b1Configuration, the first minor matters line b is specifically extended in banding1Length and width determine according to this default frequency domain.
Wave filter according to the third implementation, by based on to the requirement being used for passband and the frequency range of the conversion of stopband, arranging these second minor matters line b2Length L1 and the first minor matters line b1Length and width, it is possible to according to increasing the design flexibility to the filter shape of the present invention.
In conjunction with above-mentioned implementation, in the 4th kind of implementation of the present invention, these minor matters structure b also includes: the 4th minor matters line b4, it is constructed from a material that be electrically conducting, an end b4-1It is arranged in these second minor matters line b2On, another end b4-2Ground connection configures.
Wave filter according to the 4th kind of implementation, by the second minor matters line b2On arrange ground connection configuration the 4th minor matters line b4, it is possible to realize, based on to the requirement being used for passband and the frequency range of the conversion of stopband, arranging these second minor matters line b2Length L1 and the 4th minor matters line b4Length and width, it is possible to according to increasing the design flexibility to the filter shape of the present invention.
In conjunction with above-mentioned implementation, in the 5th kind of implementation of the present invention, the 4th minor matters line b4With these first minor matters line b1The specifically different piece of same strip-shaped conductive material d.
Wave filter according to the 5th kind of implementation, by being made up of the first minor matters line b same strip-shaped conductive material1With the 4th minor matters line b4, it is possible to increase the machinability of the wave filter of the present invention and formation efficiency.
In conjunction with above-mentioned implementation, in the 6th kind of implementation of the present invention, these minor matters structure b also includes: the 5th minor matters line b5, it is constructed from a material that be electrically conducting, an end b5-1It is arranged in the 3rd minor matters line b3On, the 5th minor matters line b5Another end b5-2Unsettled configuration.
Wave filter according to the 6th kind of implementation, by the 3rd minor matters line b3On the 5th minor matters line b of unsettled configuration is set5, it is possible to realize, based on to the requirement being used for passband and the frequency range of the conversion of stopband, arranging these second minor matters line b2Length L1 and the 5th minor matters line b5Length and width, it is possible to according to increasing the design flexibility to the filter shape of the present invention.
In conjunction with above-mentioned implementation, in the 7th kind of implementation of the present invention, the 5th minor matters line b5With these first minor matters line b1The specifically different piece of same strip-shaped conductive material e.
Wave filter according to the 7th kind of implementation, by being made up of the first minor matters line b same strip-shaped conductive material1With the 5th minor matters line b5, it is possible to increase the machinability of the wave filter of the present invention and formation efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in the embodiment of the present invention will be briefly described below, apparently, drawings described below is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of wave filter according to an embodiment of the invention.
Fig. 2 is the schematic diagram of wave filter according to another embodiment of the present invention.
Fig. 3 is the schematic diagram of wave filter according to yet another embodiment of the invention.
Fig. 4 is the schematic diagram of wave filter according to yet another embodiment of the invention.
Fig. 5 is the schematic diagram of wave filter according to yet another embodiment of the invention.
Fig. 6 is the schematic diagram of wave filter according to yet another embodiment of the invention.
Accompanying drawing labelling:
A-main transmission line
B-minor matters structure
b1-the first minor matters line
b1-1One end of the-the first minor matters line
b2-the second minor matters line
b2-1One end of the-the second minor matters line
b2-2Another end of-the second minor matters line
b3-three minor matters line
b3-1One end of-three minor matters line
b3-2Another end of-three minor matters line
C-strip-shaped conductive material
c1-strip-shaped conductive material c is used for and the first minor matters line b1The junction point connected
b4-four minor matters line
b4-1One end of-four minor matters line
b4-2Another end of-four minor matters line
D-strip-shaped conductive material
b5-five minor matters line
b5-1One end of-five minor matters line
b5-2Another end of-five minor matters line
E-strip-shaped conductive material
Detailed description of the invention
Describe multiple embodiment referring now to accompanying drawing, wherein indicate similar elements herein with identical accompanying drawing labelling.In the following description, for ease of explaining, a large amount of detail is given, in order to provide the comprehensive understanding to one or more embodiments.It may be evident, however, that described embodiment can also be practiced without these specific details.In other example, known features and equipment are shown in block diagram form, in order to describe one or more embodiment.
The term " parts " that uses in this manual, " module ", " system " etc. are for representing entity, hardware, firmware, the combination of hardware and software, software or the executory software that computer is relevant.Such as, parts can be but not limited to, process, processor, object, executable file, execution thread, program and/or the computer run on a processor.By illustrating, the application run on the computing device and computing equipment can be parts.One or more parts can reside in process and/or perform in thread, and parts can be located on a computer and/or are distributed between 2 or more computer.Additionally, these parts can have the various computer-readable mediums of various data structure to perform from storage herein above.Parts can such as be communicated by locally and/or remotely process according to the signal with one or more packet (such as from the data of two parts mutual with local system, distributed system and/or another parts internetwork, for instance by the Internet of signal with other system interaction).
The wave filter of the embodiment of the present invention can be arranged at or itself be access terminal.Access terminal and can also be called system, subscriber unit, subscriber station, movement station, mobile platform, remote station, remote terminal, mobile equipment, user terminal, terminal, Wireless Telecom Equipment, user agent, user's set or subscriber equipment (UE, UserEquipment).Accessing terminal can be cell phone, wireless phone, SIP (SessionInitiationProtocol, session initiation protocol) phone, WLL (WirelessLocalLoop, WLL) stand, PDA (PersonalDigitalAssistant, personal digital assistant), there is the handheld device of radio communication function, computing equipment or be connected to other process equipment of radio modem.
Additionally, the wave filter of the embodiment of the present invention can also be arranged at or itself is base station.Base station can be used for and mobile device communication, base station can be WLAN (WLAN, WirelessLocalAreaNetworks) AP (AccessPoint in, WAP), or global system for mobile telecommunications (GSM, or CDMA (CDMA GlobalSystemofMobilecommunication), CodeDivisionMultipleAccess) base station (BTS in, BaseTransceiverStation), can also be WCDMA (WCDMA, WidebandCodeDivisionMultipleAccess) base station (NB in, NodeB), can also is that Long Term Evolution (LTE, LongTermEvolution) evolved base station (eNB/eNodeB in, EvolutionalNodeB), or relay station or access point, or the base station equipment etc. in following 5G network.
Additionally, various aspects of the invention or feature can be implemented as device or use the goods of standard program and/or engineering.Term " goods " used herein is contained can from the computer program of any computer-readable device, carrier or medium access.Such as, computer-readable medium can include, but it is not limited to: magnetic memory device is (such as, hard disk, floppy disk or tape etc.), CD is (such as, CD (CompactDisk, compact disk), DVD (DigitalVersatileDisk, digital universal disc) etc.), smart card and flush memory device are (such as, EPROM (ErasableProgrammableRead-OnlyMemory, Erarable Programmable Read only Memory), card, rod or Keyed actuator etc.).It addition, various storage media described herein can represent the one or more equipment for storing information and/or other machine readable media.Term " machine readable media " may include but be not limited to, wireless channel and can store, comprise and/or carry other media various of instruction and/or data.
The wave filter provided in the embodiment of the present invention can apply to band elimination filter etc., and for the ease of understanding and illustrating, below, structure and design during so that the wave filter of the embodiment of the present invention is applied to band elimination filter are described in detail.
Band elimination filter (BSF, bandstopfilters) refers to by most of frequency components but the frequency component of default frequency domain decays to the wave filter of extremely low level.
Fig. 1 is the schematic diagram of the wave filter of one embodiment of the invention.As it is shown in figure 1, this wave filter includes:
Main transmission line a, is constructed from a material that be electrically conducting；
Minor matters structure b, for filtering the component of signal including presetting in the default frequency domain of frequency f from the signal of transmission among this main transmission line a, including:
First minor matters line b1, it is constructed from a material that be electrically conducting, including at least two end, one of them end b1-1It is arranged on this main transmission line a；
Second minor matters line b2, it is constructed from a material that be electrically conducting, extends configuration, an end b in banding2-1It is arranged in these first minor matters line b1On, another end b2-2Ground connection configures, wherein, and these second minor matters line b2Length L1 determine according to this default frequency domain；
3rd minor matters line b3, it is constructed from a material that be electrically conducting, extends configuration, an end b in banding3-1It is arranged in these first minor matters line b1On, another end b3-2Unsettled configuration；
Wherein, the 3rd minor matters line b3Length L2 and this length L1 sum be that the wavelength X corresponding to this predeterminated frequency f is determined.
Below, configuration and function to parts each in the wave filter of the embodiment of the present invention is described in detail respectively.
Main transmission line a
In embodiments of the present invention, main transmission line a can be formed by conductive material, such as, as shown in Figure 1, main transmission line a can be only fitted in the first plane, prolonging first direction is that banding extends banding, it is configured with signal input port in one end of the main transmission line a of this banding, the other end at the main transmission line a of this banding is configured with signal output port, the echo signal with certain frequency width being filtered processing is needed to input from above-mentioned signal input port, under the effect of minor matters structure b, in the band width of this echo signal, the component of signal in preset range is attenuated (in other words, filter), signal after filtration exports from signal output port.
Should be understood that the shape of the main transmission line a shown in Fig. 1 is merely illustrative, the present invention is also not particularly limited.
Minor matters structure b
For providing resonance circuit, the signal in the preset range made in the echo signal of transmission in main transmission line a is decayed, thus reaching filter effect.
The main devices constituting minor matters structure b below in the wave filter of the embodiment of the present invention is described in detail.
1. the first minor matters line b1
In embodiments of the present invention, the first minor matters line b1Being made of an electrically conducting material, being used for will by aftermentioned second minor matters line b2With the 3rd minor matters line b3Electrically connect with main transmission line a Deng the resonance circuit constituted, with in main transmission line a during transmission objectives signal, via the first minor matters line b1Conduction and produce the resonance signal corresponding with the component of signal being in default frequency domain in this echo signal in a resonant circuit.
Non-limiting as an example, as it is shown in figure 1, these first minor matters line b1Can be only fitted in above-mentioned first plane, prolonging second direction is that banding extends, these first minor matters line (b1) an end (b1-1) be arranged on described main transmission line (a), it addition, this second direction can or near normal vertical with above-mentioned first direction.
Alternatively, the first minor matters line b1Configuration, the first minor matters line b is specifically extended in banding1Length and width determine according to this default frequency domain.
Specifically, as it is shown in figure 1, in embodiments of the present invention, the first minor matters line b1Ribbon can be formed as, and, these first minor matters line b1Following relation can be had with above-mentioned default frequency domain:
These first minor matters line b1More long, this preset range is more little, and namely the roll-off characteristic of wave filter is more precipitous；
These first minor matters line b1More short, this preset range is more big, and namely the roll-off characteristic of wave filter is more mild；
These first minor matters line b1More thin, this preset range is more little, and namely the roll-off characteristic of wave filter is more precipitous；
These first minor matters line b1More wide, this preset range is more big, and namely the roll-off characteristic of wave filter is more mild.
Should be understood that these first minor matters line b listed above1Shape or quantity be merely illustrative, the present invention is not limited to this, for instance, as it is shown in figure 5, these first minor matters line b1Can also be made up of multiple banded conductor materials, or, these first minor matters line b1Can also bend roundabout.
2. the second minor matters line b2
In embodiments of the present invention, the second minor matters line b2It is made of an electrically conducting material, an end b2-1It is arranged in these first minor matters line b1On, another end b2-2Ground connection configures, due to the second minor matters line b2End b2-2Ground connection configures, therefore, it is possible to by the second minor matters line b2There is provided inductance characteristic, i.e. the second minor matters line b can be passed through2Constitute the inductance element in resonance circuit.
Non-limiting as an example, as it is shown in figure 1, these second minor matters line b2Can be only fitted in above-mentioned first plane, prolonging third direction is that banding extends, and wherein, this third direction can or less parallel parallel with this first direction.
It addition, in embodiments of the present invention, these second minor matters line b2Length L1 (specifically, this L1 is from the second minor matters line b2End b2-1To the second minor matters line b2End b2-2Between length) determine according to this default frequency domain.
These second minor matters line b2Length L1 and above-mentioned default frequency domain can have following relation:
This L1 is more long, it is provided that inductance more big, this preset range is more big, and namely the roll-off characteristic of wave filter is more mild；
This L1 is more short, it is provided that inductance more little, this preset range is more little, and namely the roll-off characteristic of wave filter is more precipitous.
Additionally, in embodiments of the present invention, this length L1 and aftermentioned 3rd minor matters line b3Length L2 sum also need to the frequency f (specifically, be the wavelength corresponding to this frequency f) of the component of signal of required decay with echo signal and keep preset relation, subsequently, this preset relation is described in detail.
Non-limiting as an example, these second minor matters line b2End b2-1Can be only fitted to these first minor matters line b1Another end b1-2On.
3. the 4th minor matters line b4
Alternatively, these minor matters structure b also includes:
4th minor matters line b4, it is constructed from a material that be electrically conducting, an end b4-1It is arranged in these second minor matters line b2On, another end b4-2Ground connection configures.
Specifically, in embodiments of the present invention, the 4th minor matters line b4It is made of an electrically conducting material, an end b4-1It is arranged in these second minor matters line b2On, another end b4-2Ground connection configures, due to the 4th minor matters line b4End b4-1Ground connection configures, therefore, and the 4th minor matters line b4Inductance characteristic can be provided, i.e. the second minor matters line b can be passed through2With the 4th minor matters line b4Constitute the inductance element in resonance circuit.
Non-limiting as an example, as it is shown on figure 3, the 4th minor matters line b4Can be only fitted in above-mentioned first plane, prolonging the 5th direction is that banding extends, and wherein, the 5th direction can or near normal vertical with this third direction.Further, the 4th minor matters line b4End b4-1Can be only fitted to the second minor matters line b2End b2-1, in other words, the first minor matters line b1End b1-2。
In embodiments of the present invention, the 4th minor matters line b is being set4After, the 4th minor matters line b4With the second minor matters line b2Be equivalent to the inductance being connected in parallel, thus, and it is separately provided the second minor matters line b2Comparing, the inductance that minor matters structure b provides reduces.Further, the inductance provided due to the minor matters structure b inductance provided is more little, and preset range is more little, and namely the roll-off characteristic of wave filter is more precipitous.Therefore, by arranging the 4th minor matters line b4, it is possible to it is easily achieved precipitous roll-off characteristic further.Further, owing to arranging the 4th minor matters line b4The inductance that rear minor matters structure b provides reduces, therefore, under the premise providing identical inductances, it is possible to suitably increase the second minor matters line b2Length L1, it is possible to according to increasing the design flexibility to the filter shape of the present invention.
Should be understood that the 4th minor matters line b shown in Fig. 34Shape and quantity merely illustrative and non-limiting, the 4th minor matters line b4Shape and quantity as required, can arbitrarily set and change.
Non-limiting as an example, the 4th minor matters line b4End b4-1Concrete configuration is at these second minor matters line b2End b2-1On.
Further, the 4th minor matters line b4Length L3 identical with this length L1 or approximately the same.
It addition, the 4th minor matters line b4With these first minor matters line b1It can be the different piece of same strip-shaped conductive material.
4. the 3rd minor matters line b3
In embodiments of the present invention, the 3rd minor matters line b3It is made of an electrically conducting material, an end b3-1It is arranged in these first minor matters line b1On, another end b3-2Unsettled configuration, due to the 3rd minor matters line b3End b3-2Unsettled configuration, therefore, it is possible to by the 3rd minor matters line b3There is provided capacitance characteristic, i.e. the 3rd minor matters line b can be passed through3Constitute the capacity cell in resonance circuit.
Non-limiting as an example, as it is shown in figure 1, the 3rd minor matters line b3Can be only fitted in described first plane, prolonging fourth direction is that banding extends, and this fourth direction is parallel with described first direction or less parallel.
It addition, in embodiments of the present invention, the 3rd minor matters line b3Length L3 (specifically, this L3 is from the 3rd minor matters line b3End b3-1To the 3rd minor matters line b3End b3-2Between length) can determine according to this default frequency domain.
Additionally, in embodiments of the present invention, above-mentioned length L1 and length L2 sum also need to the frequency f (specifically, be wavelength) corresponding to this frequency f of the component of signal of required decay with echo signal and keep preset relation.
Alternatively, the 3rd minor matters line b3Length L2 and this length L1 sum be equal or approximately equal to 1/4th of the wavelength X corresponding to this predeterminated frequency f.
The relation that should be understood that between the frequency f of the component of signal of length L1 listed above and length L2 sum and required decay is merely illustrative, and the present invention is not limited to this.
Non-limiting as an example, the 3rd minor matters line b3End b3-1Concrete configuration is at these first minor matters line b1Another end b1-2On.
Alternatively, these second minor matters line b2With the 3rd minor matters line b3The specifically different piece of same strip-shaped conductive material c.
Specifically, as it is shown in figure 1, these second minor matters line b2With the 3rd minor matters line b3Can being be made up of same strip-shaped conductive material c, this strip-shaped conductive material c be positioned at these first minor matters line b1End b1-2The part part of configuration (ground connection) of side constitute the second minor matters line b2；This strip-shaped conductive material c is positioned at these first minor matters line b1End b1-2The part (part of unsettled configuration) of side constitute the second minor matters line b2。
By being made up of the second minor matters line b same strip-shaped conductive material2With the 3rd minor matters line b3, it is possible to increase the machinability of the wave filter of the present invention and formation efficiency.
Alternatively, this strip-shaped conductive material c include for these first minor matters line b1The junction point connected, this strip-shaped conductive material c by this junction point position changeable on the length direction of this strip-shaped conductive material c more in the way of, with these first minor matters line b1Connect.
Specifically, in embodiments of the present invention, this strip-shaped conductive material c can longitudinally (such as, above-mentioned third direction or fourth direction) above move, i.e. this strip-shaped conductive material c and these first minor matters line b1Junction point can be upper mobile at the length direction (such as, above-mentioned third direction or fourth direction) of strip-shaped conductive material c, thus, these second minor matters line b2With the 3rd minor matters line b3Length can change according to the movement of above-mentioned junction point.
By making this strip-shaped conductive material c and these first minor matters line b1Junction point position on the length direction of this strip-shaped conductive material c can arbitrarily change, it is capable of tackling the different requirements for completing passband and the frequency range of the conversion of stopband flexibly by same wave filter, improves the practicality of the wave filter of the present invention further.
Should be understood that the second minor matters line b listed above2With the 3rd minor matters line b3Configuration mode be only exemplary and illustrate, the present invention is not limited to this, for instance, as in figure 2 it is shown, the second minor matters line b2With the 3rd minor matters line b3Can not also be parallel to each other, and it is not at same straight line.
5. the 5th minor matters line b5
Alternatively, these minor matters structure b also includes:
5th minor matters line b5, it is constructed from a material that be electrically conducting, an end b5-1It is arranged in the 3rd minor matters line b3On, the 5th minor matters line b5Another end b5-2Unsettled configuration.
Specifically, in embodiments of the present invention, the 5th minor matters line b5It is made of an electrically conducting material, an end b5-1It is arranged in the 3rd minor matters line b3On, another end b5-2Unsettled configuration, due to the 5th minor matters line b5End b5-2Unsettled configuration, therefore, the 5th minor matters line b5Capacitance characteristic can be provided, i.e. the 3rd minor matters line b can be passed through3With the 5th minor matters line b5Constitute the capacity cell in resonance circuit.
Non-limiting as an example, as shown in Figure 4, the 5th minor matters line b5Can be only fitted in above-mentioned first plane, prolonging the 6th direction is that banding extends, and wherein, the 6th direction can or near normal vertical with this fourth direction.Further, the 5th minor matters line b5End b5-1Can be only fitted to the 3rd minor matters line b3End b3-1, in other words, the first minor matters line b1End b1-2。
In embodiments of the present invention, the 5th minor matters line b is being set5After, the 5th minor matters line b5With the 3rd minor matters line b3Be equivalent to the electric capacity being connected in parallel, thus, and it is separately provided the 3rd minor matters line b3Comparing, the electric capacity that minor matters structure b provides increases so that the inductance that minor matters structure b provides reduces.Further, the inductance provided due to the minor matters structure b inductance provided is more little, and preset range is more little, and namely the roll-off characteristic of wave filter is more precipitous, therefore, by arranging the 5th minor matters line b5, it is possible to it is easily achieved precipitous roll-off characteristic further.Further, owing to arranging the 5th minor matters line b5The inductance that rear minor matters structure b provides reduces, therefore, under the premise providing identical inductances, it is possible to suitably increase the second minor matters line b2Length L1, it is possible to according to increasing the design flexibility to the filter shape of the present invention.
Should be understood that in embodiments of the present invention, the 4th minor matters line b4With the 5th minor matters line b5Can configuring simultaneously can also only configure a wherein side, the present invention is also not particularly limited.
Should be understood that the 5th minor matters line b shown in Fig. 45Shape and quantity merely illustrative and non-limiting, the 5th minor matters line b5Shape and quantity as required, can arbitrarily set and change.
Non-limiting as an example, the 5th minor matters line b5End b5-1Concrete configuration is at the 3rd minor matters line b3End b3-1On.
Further, the 5th minor matters line b5Length L5 identical with this length L2 or approximately the same.
It addition, the 5th minor matters line b5With these first minor matters line b1It can be the different piece of same strip-shaped conductive material.
It should be understood that, the structure of the wave filter of the embodiment of the present invention listed above is only exemplary explanation, the present invention is not limited to this, such as, as shown in Figure 6, the wave filter of the present invention can include multiple minor matters structure b, wherein, each minor matters structure b may be used for filtering the component of signal of different frequency domain (in other words, different frequency).
Exemplarily non-limiting, in embodiments of the present invention, for instance, the wave filter shown in Fig. 1 can have following size:
The length of main transmission line a is 40mm；
The width of main transmission line a is 5.5mm；
First minor matters line b1It is 10mm with the distance of an end (such as, signal input part) of the junction point of main transmission line a distance main transmission line a；
First minor matters line b1Length be 5mm；
First minor matters line b1Width be 2mm；
Second minor matters line b2Length L2 be 12.6mm；
Second minor matters line b2Width be 4mm；
3rd minor matters line b3Length L1 be 32.1mm；
3rd minor matters line b3Width be 4mm.
Wave filter according to embodiments of the present invention, makes the second minor matters line b in minor matters structure b2One end ground connection, make the 3rd minor matters line b3One end unsettled, it is possible to by the second minor matters line b2With the 3rd minor matters line b3Inductance characteristic and capacitance characteristic are provided such that it is able to in the signal of transmission in main transmission line a with the 3rd minor matters line b3Length L2 and the second minor matters line b2The corresponding default frequency domain of length L1 sum in component of signal decay, by changing the second minor matters line b2Length, it is possible to be easily achieved the change to this default frequency domain, i.e. can be easy to realize the control of the frequency range to the conversion for completing passband and stopband, thus, it is possible to be easily achieved precipitous roll-off characteristic.
Those of ordinary skill in the art are it is to be appreciated that the unit of each example that describes in conjunction with the embodiments described herein and algorithm steps, it is possible to being implemented in combination in of electronic hardware or computer software and electronic hardware.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel specifically can should be used for using different methods to realize described function to each, but this realization is it is not considered that beyond the scope of this invention.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, and the specific works process of the system of foregoing description, device and unit, it is possible to reference to the corresponding process in preceding method embodiment, do not repeat them here.
It should be understood that, in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, and the execution sequence of each process should be determined with its function and internal logic, and the implementation process of the embodiment of the present invention should not constituted any restriction.
In several embodiments provided herein, it should be understood that disclosed device can realize by another way.Such as, device embodiment described above is merely schematic, such as, the division of described unit, being only a kind of logic function to divide, actual can have other dividing mode when realizing, for instance multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can ignore, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some interfaces, device or unit, it is possible to be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.
If described function is using the form realization of SFU software functional unit and as independent production marketing or use, it is possible to be stored in a computer read/write memory medium.Based on such understanding, part or the part of this technical scheme that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), magnetic disc or CD.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (10)
1. a wave filter, it is characterised in that including:
Main transmission line (a), is constructed from a material that be electrically conducting；
Minor matters structure (b), for filtering the component of signal including presetting in the default frequency domain of frequency f from the signal of transmission described main transmission line (a), including:
First minor matters line (b1), it is constructed from a material that be electrically conducting, including at least two end, one of them end (b1-1) be arranged on described main transmission line (a)；
Second minor matters line (b2), it is constructed from a material that be electrically conducting, extends configuration, an end (b in banding2-1) it is arranged in described first minor matters line (b1) on, another end (b2-2) ground connection configuration, wherein, described second minor matters line (b2) length L1 determine according to described default frequency domain；
3rd minor matters line (b3), it is constructed from a material that be electrically conducting, extends configuration, an end (b in banding3-1) it is arranged in described first minor matters line (b1) on, another end (b3-2) unsettled configuration；
Wherein, described 3rd minor matters line (b3) length L2 and described length L1 sum determine according to described predeterminated frequency f.
2. wave filter according to claim 1, it is characterised in that described 3rd minor matters line (b3) length L2 and described length L1 sum be equal or approximately equal to 1/4th of the wavelength X corresponding to described predeterminated frequency f.
3. wave filter according to claim 1 and 2, it is characterised in that described second minor matters line (b2) and described 3rd minor matters line (b3) different piece of specifically same strip-shaped conductive material (c).
4. wave filter according to claim 3, it is characterised in that described strip-shaped conductive material (c) include for described first minor matters line (b1) junction point that connects, described strip-shaped conductive material (c) by described junction point position changeable on the length direction of described strip-shaped conductive material (c) more in the way of, with described first minor matters line (b1) connect.
5. wave filter according to any one of claim 1 to 4, it is characterised in that the first minor matters line (b1) configuration, the first minor matters line (b is specifically extended in banding1) length and width determine according to described default frequency domain.
6. wave filter according to any one of claim 1 to 5, it is characterised in that described minor matters structure (b) also include:
4th minor matters line (b4), it is constructed from a material that be electrically conducting, an end (b4-1) it is arranged in described second minor matters line (b2) on, another end (b4-2) ground connection configuration.
7. wave filter according to claim 6, it is characterised in that described 4th minor matters line (b4) and described first minor matters line (b1) different piece of specifically same strip-shaped conductive material (d).
8. the wave filter according to claim 6 or 7, it is characterised in that described 4th minor matters line (b4) shape and described second minor matters line (b2) shape identical or approximately the same.
9. wave filter according to any one of claim 1 to 8, it is characterised in that described minor matters structure (b) also include:
5th minor matters line (b5), it is constructed from a material that be electrically conducting, an end (b5-1) it is arranged in described 3rd minor matters line (b3) on, the 5th minor matters line (b5) another end (b5-2) unsettled configuration.
10. wave filter according to claim 9, it is characterised in that described 5th minor matters line (b5) and described first minor matters line (b1) different piece of specifically same strip-shaped conductive material (e).
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| CN201610056890.7A CN105720333A (en) | 2016-01-28 | 2016-01-28 | Filter |
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