CN103094650B - Resonant cavity filter and microwave circuit - Google Patents
Resonant cavity filter and microwave circuit Download PDFInfo
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- CN103094650B CN103094650B CN201110337843.7A CN201110337843A CN103094650B CN 103094650 B CN103094650 B CN 103094650B CN 201110337843 A CN201110337843 A CN 201110337843A CN 103094650 B CN103094650 B CN 103094650B
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Abstract
The waveguide mouth, the multiple through hole be connected through body one side surface and with resonant cavity and the Meta Materials be filled in resonant cavity that the invention discloses a kind of resonant cavity filter, this resonant cavity filter comprises body, is arranged on intrinsic resonant cavity, be coupled through body two opposing end surface and with resonant cavity.The present invention further discloses a kind of microwave circuit.By with upper type, technical scheme provided by the invention keeping reducing size under the constant prerequisite of original operating frequency, can meet the demand of device miniaturization.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of resonant cavity filter and microwave circuit.
Background technology
Along with the high development of semiconductor technology, propose more and more higher requirement to current electronic system integrated level, the miniaturization of device becomes the technical problem that whole industry is paid special attention to.But, be different from the development that IC chip follows " Moore's Law ", as the other important composition-radio-frequency devices of electronic system, be but faced with the highly difficult technological challenge of device miniaturization, how reduce the size of radio-frequency devices and improve radio-frequency devices performance and become key issue.
Resonant cavity filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication, in a base station, resonant cavity filter for selecting signal of communication, the clutter outside filtering communication signal frequency or interference signal.
The structure of resonant cavity filter of the prior art as shown in Figure 1, the resonant cavity filter of prior art comprises multiple resonant cavity 11, 12, 13, 14, 15, 16, 17 and screw rod 21, 27, screw rod 21 is inserted in resonant cavity 11 respectively, screw rod 27 is inserted in resonant cavity 17, resonant cavity 11 is utilized to be coupled with screw rod 21, resonant cavity 17 is coupled with screw rod 27, regulate the insertion depth of resonant cavity screw rod, with regard to adjustable S parameter and abruptness, but, in microwave circuit various Metal cavity due to volume and weight too large, be difficult to mutually integrated with microstrip circuit, therefore, need badly and a kind of resonant cavity filter and microwave circuit are provided, with reduction of device volume, meet device miniaturization requirement.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of resonant cavity filter and microwave circuit, to utilize Meta Materials characteristic keeping reducing size under the constant prerequisite of original operating frequency, meets the demand of device miniaturization.
The present invention is the technical scheme that technical solution problem adopts: provide a kind of resonant cavity filter, and this resonant cavity filter comprises body, is arranged on intrinsic resonant cavity, the waveguide mouth, the multiple through hole be connected through described body one side surface and with described resonant cavity and the Meta Materials be filled in resonant cavity that are coupled through body two opposing end surface and with resonant cavity.
Wherein, resonant cavity filter comprises multiple screw rod further, and screw rod coordinates with clear size of opening, and each screw rod is inserted on corresponding through hole respectively.
Wherein, screw rod spiral is inserted in through hole, and screw rod through hole insertion depth adjustable.
Wherein, resonant cavity is rectangle or cylindrical cavity.
Wherein, the dielectric constant of Meta Materials is not less than 2500.
The present invention is the technical scheme that technical solution problem adopts: provide a kind of microwave circuit, this microwave circuit comprises resonant cavity filter, and this resonant cavity filter comprises body, is arranged on intrinsic resonant cavity, the waveguide mouth, the multiple through hole be connected through body one side surface and with resonant cavity and the Meta Materials be filled in resonant cavity that are coupled through body two opposing end surface and with resonant cavity.
Wherein, resonant cavity filter comprises multiple screw rod further, and screw rod coordinates with clear size of opening, and each screw rod is inserted on corresponding through hole respectively.
Wherein, screw rod spiral is inserted in through hole, and screw rod through hole insertion depth adjustable.
Wherein, resonant cavity is rectangle or cylindrical cavity.
Wherein, the dielectric constant of Meta Materials is not less than 2500.
The invention has the beneficial effects as follows: the situation being different from prior art, in disclosed technical scheme, Meta Materials is arranged in the resonant cavity of resonant cavity filter, because Meta Materials has high-k characteristic, therefore disclosed resonant cavity filter and microwave circuit can keep reducing size under the constant prerequisite of original operating frequency, thus meet the demand of device miniaturization.
Accompanying drawing explanation
Fig. 1 is the perspective view of resonant cavity filter of the prior art;
Fig. 2 is the three-dimensional structure diagram of resonant cavity filter according to an embodiment of the invention;
Fig. 3 is the perspective view of the resonant cavity filter shown in Fig. 2;
Fig. 4 is the performance diagram of the resonant cavity filter shown in Fig. 2.
Embodiment
Please also refer to Fig. 2 and Fig. 3, Fig. 2 is the three-dimensional structure diagram of resonant cavity filter according to an embodiment of the invention, Fig. 3 is the perspective view of the resonant cavity filter shown in Fig. 2, as shown in Figures 2 and 3, resonant cavity filter of the present invention comprise body 32, the resonant cavity 33 be arranged in body 32, the waveguide mouth 34 be connected through body 32 liang of opposing end surfaces and with resonant cavity 33, the multiple through holes 31 be connected through body 32 1 side surface and with resonant cavity 33 and the Meta Materials (not shown) be filled in resonant cavity 33.In the present invention, Meta Materials Technology design is utilized to go out to have the Meta Materials of ultra-high dielectric coefficient, and with Meta Materials as the resonator in cavity body filter, cavity body filter is after putting into this resonator, because Meta Materials has ultra-high dielectric coefficient, therefore, when keeping original operating frequency constant, the volume of resonant cavity 33 can be made at least to reduce three-to-four-fold, and then the volume of resonant cavity filter also can be reduced accordingly.Wherein, the dielectric constant of Meta Materials is high, and specifically, its dielectric constant is not less than 2500.
Further, because resonant cavity 33 is single resonance cavity, and Meta Materials is adopted to fill this single resonance cavity, therefore can effectively frequency reducing, and effectively improve S parameter performance.
Wherein, cavity body filter comprises multiple screw rod (not shown) further, screw rod and through hole 31 dimensional fits, each screw rod is inserted on corresponding through hole 31 respectively, further, screw rod can be inserted in through hole 31 by spiral, screw rod through hole 31 insertion depth adjustable, through hole 31 is coupled with the Meta Materials as resonator, by adjusting the degree of coupling of screw rod and resonant cavity 33 thus can reaching best low-loss high q-factor and best attenuation outside a channel steepness.
Adopt the low-loss composite base material of high-k at Meta Materials of the present invention, through hole 31 is coupled with the resonant cavity 33 being added with Meta Materials, reaches best low-loss high q-factor, attenuation outside a channel steepness by the degree of coupling of adjustment screw rod and resonant cavity 33.
In addition, by adding Meta Materials dielectric material at resonant cavity, frequency reducing object can be reached, thus make resonant cavity volume-diminished.Further, add the dielectric material conductance that Meta Materials more can improve resonant cavity, to reach low-loss object, thus improve performance of filter.
In embodiments of the present invention, Meta Materials yaw is filled in resonant cavity 33, and the resonant cavity 33 being filled with Meta Materials is except can realizing effective frequency reducing, also by arrange the size of Meta Materials in resonant cavity 33, distribution and base material dielectric constant to adjust cavity body filter resonance frequency, and adjustment excitation coupled modes, Insertion Loss in band, band passband are wide, attenuation outside a channel steepness, extreme value parameter at zero point.
It should be noted that the resonant cavity 33 shown in Fig. 3 is rectangular cavity, but in actual applications, also can be set to cylindrical cavity.
In addition, because Meta Materials is originally as the structural material with Super Hi-Index, its Super Hi-Index is conducive to the miniaturization of microwave dielectric filter, filter can be made to realize microwave circuit hybrid integrated with microwave tube, microstrip line, device size is made to reach a millimeter magnitude, its price is also cheaper than the resonant cavity being filled with metal, can reduce costs further.
Fig. 4 is the performance diagram of the resonant cavity filter shown in Fig. 2.Specifically, Fig. 4 is S11 Parameter Map, and display filter bandwidht and filtering performance, transverse axis is frequency, and the longitudinal axis is db value, and wherein m8 is S11 minimum point, and m6, m7 represent a bandwidth respectively, and the bandpass value in this bandwidth.As shown in Figure 4, filter emulates the result drawn, and finds that S parameter is improved, filter becomes an excellent narrow band filter, and wherein, centre frequency 2.5G return loss can reach-60db, the effective bandwidth of m6 and m7 point all can reach about-50db, and attenuation outside a channel abruptness is good.Visible, by adding Meta Materials at resonant cavity 33, frequency reducing object can be reached, thus make resonant cavity volume-diminished and improve the performance of filter.
The present invention discloses a kind of microwave circuit further, and it comprises the resonant cavity filter of above-mentioned announcement.
In sum, in disclosed technical scheme, Meta Materials is arranged in the resonant cavity 33 of resonant cavity filter, because Meta Materials has high-k characteristic, therefore disclosed resonant cavity filter and microwave circuit can keep reducing size under the constant prerequisite of original operating frequency, thus meet the demand of device miniaturization.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a resonant cavity filter, it is characterized in that, described resonant cavity filter comprises body, is arranged on intrinsic resonant cavity, be coupled through described body two opposing end surface and with described resonant cavity waveguide mouth, the multiple through hole be connected through described body one side surface and with described resonant cavity and the Meta Materials with ultra-high dielectric coefficient be filled in described resonant cavity, the dielectric constant of described Meta Materials is not less than 2500, and described multiple through hole is coupled with described Meta Materials.
2. resonant cavity filter according to claim 1, is characterized in that, described resonant cavity filter comprises multiple screw rod further, and described screw rod coordinates with described clear size of opening, and screw rod described in each is inserted on corresponding described through hole respectively.
3. resonant cavity filter according to claim 2, is characterized in that, described screw rod is inserted in described through hole, and described screw rod is adjustable in the insertion depth of described through hole.
4. resonant cavity filter according to claim 1, is characterized in that, described resonant cavity is rectangle or cylindrical cavity.
5. a microwave circuit, it is characterized in that, described microwave circuit comprises resonant cavity filter, described resonant cavity filter comprises body, is arranged on intrinsic resonant cavity, be coupled through described body two opposing end surface and with described resonant cavity waveguide mouth, the multiple through hole be connected through described body one side surface and with described resonant cavity and the Meta Materials with ultra-high dielectric coefficient be filled in described resonant cavity, the dielectric constant of described Meta Materials is not less than 2500, and described multiple through hole is coupled with described Meta Materials.
6. microwave circuit according to claim 5, is characterized in that, described resonant cavity filter comprises multiple screw rod further, and described screw rod coordinates with described clear size of opening, and screw rod described in each is inserted on corresponding described through hole respectively.
7. microwave circuit according to claim 6, is characterized in that, described screw rod is inserted in described through hole, and described screw rod is adjustable in the insertion depth of described through hole.
8. microwave circuit according to claim 5, is characterized in that, described resonant cavity is rectangle or cylindrical cavity.
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| CN201110337843.7A CN103094650B (en) | 2011-10-31 | 2011-10-31 | Resonant cavity filter and microwave circuit |
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| CN201110337843.7A CN103094650B (en) | 2011-10-31 | 2011-10-31 | Resonant cavity filter and microwave circuit |
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| CN103094650A CN103094650A (en) | 2013-05-08 |
| CN103094650B true CN103094650B (en) | 2016-03-23 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026257A (en) * | 2007-02-09 | 2007-08-29 | 哈尔滨工业大学 | Super-small resonant cavity |
| CN201608261U (en) * | 2010-02-09 | 2010-10-13 | 安徽省大富机电技术有限公司 | Cavity filter and resonant column |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005341350A (en) * | 2004-05-28 | 2005-12-08 | New Japan Radio Co Ltd | Filter |
| CN1913220B (en) * | 2006-08-28 | 2010-05-12 | 同济大学 | Three-D resonant cavity capable of reducing cut-off frequency |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026257A (en) * | 2007-02-09 | 2007-08-29 | 哈尔滨工业大学 | Super-small resonant cavity |
| CN201608261U (en) * | 2010-02-09 | 2010-10-13 | 安徽省大富机电技术有限公司 | Cavity filter and resonant column |
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