CN115764205A - High-frequency discrete dielectric filter with 1/4 wavelength and 1/2 wavelength for increasing dielectric width dimension - Google Patents
High-frequency discrete dielectric filter with 1/4 wavelength and 1/2 wavelength for increasing dielectric width dimension Download PDFInfo
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Abstract
The application discloses 1/4 wavelength adopts 1/2 wavelength to increase high frequency discrete dielectric filter of medium width size, including a plurality of dielectric resonator that set up side by side, every dielectric resonator's terminal surface center is formed with the resonance through-hole that is parallel to each other respectively, every the terminal surface at dielectric resonator's both ends is open the road surface, every dielectric resonator's lateral surface and the first conducting layer of coating respectively in the resonance through-hole, every dielectric resonator's both ends open the road surface respectively in the outside of resonance through-hole is formed with the second conducting layer, the resonant frequency of the size adjusting filter of second conducting layer. The invention has the advantages that the width is increased when the frequency is relative, and the invention is suitable for the design of a high-frequency narrow-passband discrete structure dielectric filter.
Description
Technical Field
The application belongs to the technical field of communication, and particularly relates to a high-frequency discrete dielectric filter with 1/4 wavelength and 1/2 wavelength for increasing the width of a medium.
Background
The width dimension L of the 1/4 wavelength TEM mode dielectric resonator is in inverse proportion to the frequency fo and the dielectric constant Er, namely the frequency is higher, the low dielectric constant material is usually selected for manufacturing, the currently used low dielectric constant material is about 9, the width dimension L of the resonator is smaller when the frequency is higher than the frequency of 3-4 mm when the frequency reaches 6000MHz, the design of a high-frequency filter is limited, the processing difficulty of the device is increased as the width dimension L of the dielectric resonator is smaller, such as dielectric grinding, the arrangement of a coupling groove, the manufacture of an input/output electrode and the difficulty of debugging of assembly are increased, and in addition, the grounding effect of the filter is also influenced by the width dimension L of the dielectric resonator which is too small.
Disclosure of Invention
The invention aims to provide a high-frequency discrete dielectric filter which adopts 1/2 wavelength to increase the width of a medium with 1/4 wavelength, has larger width when the frequency is relatively equal, and is suitable for designing a high-frequency narrow-passband discrete structure dielectric filter.
In order to achieve the purpose, the invention provides the following technical scheme:
the embodiment of the application discloses 1/4 wavelength adopts 1/2 wavelength to increase high frequency discrete dielectric filter of medium width size, including a plurality of dielectric resonator that set up side by side, every dielectric resonator's terminal surface center is formed with the resonance through-hole that is parallel to each other respectively, every the terminal surface at dielectric resonator's both ends is open the road surface, every dielectric resonator's lateral surface and the first conducting layer of coating respectively in the resonance through-hole, every dielectric resonator's both ends open the road surface respectively in the outside of resonance through-hole is formed with the second conducting layer, the resonant frequency of the size regulation filter of second conducting layer.
Preferably, in the high-frequency discrete dielectric filter in which the dielectric width is increased by 1/2 wavelength for 1/4 wavelength, the open surface is square, and the outer periphery of the second conductive layer is square or circular.
Preferably, in the above-mentioned high-frequency discrete dielectric filter in which the dielectric width is increased by 1/2 wavelength for 1/4 wavelength, a plurality of the dielectric resonators are provided.
Preferably, in the high-frequency discrete dielectric filter in which the dielectric width is increased by 1/2 wavelength for 1/4 wavelength, input/output electrodes are formed on outer side surfaces of the dielectric resonators on both sides, and the input/output electrodes extend to the other outer side surface of the dielectric resonator.
Preferably, in the high-frequency discrete dielectric filter in which the dielectric width is increased by 1/2 wavelength for 1/4 wavelength, a coupling groove perpendicular to the resonance via hole is formed on a side surface of each of two adjacent dielectric resonators.
Preferably, in the high-frequency discrete dielectric filter in which the dielectric width is increased by 1/2 wavelength for 1/4 wavelength, a metal shield case is provided on one side.
Compared with the prior art, the invention has the advantages that: when the frequency is relative, the width is increased, and the method is suitable for designing a high-frequency narrow-passband discrete structure dielectric filter.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a perspective view of a 1/4 wavelength high frequency discrete dielectric filter according to an embodiment of the present invention;
FIG. 2 is a perspective view of a high frequency discrete dielectric filter with 1/2 wavelength increased by the dielectric width in accordance with an embodiment of the present invention;
FIG. 3 is a simulation diagram of a 1/4 wavelength high frequency discrete dielectric filter according to an embodiment of the present invention;
fig. 4 is a simulation diagram of the high-frequency discrete dielectric filter with 1/2 wavelength increased by the dielectric width according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the 1/4 wavelength high frequency discrete dielectric filter 200 includes a plurality of dielectric resonators 201 arranged side by side, a resonance through hole 202 parallel to each other is formed at the center of an end face of each dielectric resonator 201, one end face of each dielectric resonator 201 is a short circuit face 207, the other end face is an open circuit face, and the outer side face of each dielectric resonator 201 and the inside of the resonance through hole 202 are coated with a first conductive layer 203. The input/output electrode 204 is formed on the outer side surface of the dielectric resonator 201 on both sides, and the input/output electrode 204 extends to the other outer side surface of the dielectric resonator 201. The side surfaces of two adjacent dielectric resonators 201 are formed with coupling grooves 205 perpendicular to the resonance via holes 202. A metal shield case 206 is provided on one side of the filter.
As shown in fig. 2, the high-frequency discrete dielectric filter 100 with 1/2 wavelength increased by the dielectric width dimension includes a plurality of dielectric resonators 101 arranged side by side, the center of the end face of each dielectric resonator 101 is respectively formed with a resonance through hole 102 parallel to each other, the end faces of both ends of each dielectric resonator 101 are open faces 107, the outer side face of each dielectric resonator 101 and the resonance through hole 102 are respectively coated with a first conductive layer 103, the open faces 107 of both ends of each dielectric resonator 101 are respectively formed with a second conductive layer 108 outside the resonance through hole 102, and the size of the second conductive layer 108 adjusts the resonance frequency of the filter. The input/output electrodes 104 are formed on the outer side surfaces of the dielectric resonators 101 on both sides, and the input/output electrodes 104 extend to the other outer side surface of the dielectric resonator 101. The side surfaces of two adjacent dielectric resonators 101 are formed with coupling grooves 105 perpendicular to the resonance via holes 102. A metal shield case 106 is provided at one side of the filter. The open surface 107 is square, and the outer periphery of the second conductive layer 108 is square or circular.
The 1/2 wavelength dielectric resonator is characterized in that two ends of the resonator are open-circuited, the other four rectangular surfaces and the inside of the resonant through hole are required to be metallized, the effect that the width dimension L is equal to the 1/4 wavelength but the frequency is increased by 2 times or the dimension L of the dielectric resonator with the same resonant frequency of 1/4 wavelength is only half of the 1/2 wavelength can be realized, and a silver surface can be added on the periphery of the resonant through hole of the open-circuited surface to adjust the frequency during actual manufacturing.
The 3-cavity dielectric filter is used for specific description, and two schemes of 1/4 wavelength and 1/2 wavelength are respectively adopted for simulation comparison.
1. 1/4 wavelength scheme: center frequency fo: around 7500MHz, passband BW: around 100MHz, the structure is adopted: the discrete built-in coupling medium filter. The dielectric resonator size W = H =3mm, and the width L = 75000/(√ ε r × fo) =3.3mm.
2. 1/2 wavelength scheme: center frequency fo: around 7500MHz, passband BW: around 100MHz, the structure is adopted: the discrete built-in coupling medium filter. The dielectric resonator size W = H =3mm, and the width L = 75000/(√ ε r fo) = 2=6.6mm.
With reference to fig. 3 and 4, through the comparison of the two sets of simulations, the higher the frequency of the 1/4 wavelength dielectric filter is, the smaller the corresponding width L is, and the greater the processing difficulty is, the 1/2 wavelength scheme can be adopted to increase the width of the dielectric filter for manufacturing, so that the processing is convenient, and the scheme is suitable for designing the high-frequency narrow-passband discrete structure dielectric filter.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is illustrative of the present disclosure and it will be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles of the disclosure, the scope of which is defined by the appended claims.
Claims (6)
1. A high-frequency discrete dielectric filter with 1/4 wavelength and 1/2 wavelength for increasing the width of a medium is characterized by comprising a plurality of dielectric resonators arranged side by side, wherein the center of the end face of each dielectric resonator is respectively provided with a resonance through hole which is parallel to each other, the end faces of two ends of each dielectric resonator are open faces, the outer side face of each dielectric resonator and the inside of each resonance through hole are respectively coated with a first conducting layer, the open faces of two ends of each dielectric resonator are respectively provided with a second conducting layer on the outer side of the resonance through hole, and the size of the second conducting layer adjusts the resonance frequency of the filter.
2. The high-frequency discrete dielectric filter according to claim 1, wherein the open surface is square, and the outer periphery of the second conductive layer is square or circular.
3. The high frequency discrete dielectric filter according to claim 1, wherein the dielectric resonator is plural in number, and the dielectric width dimension is increased by 1/2 wavelength at 1/4 wavelength.
4. The high-frequency discrete dielectric filter according to claim 1, wherein the dielectric width dimension is increased by 1/2 wavelength for 1/4 wavelength, and input/output electrodes are formed on outer side surfaces of the dielectric resonators on both sides, and the input/output electrodes extend to the other outer side surface of the dielectric resonator.
5. The 1/4 wavelength adopts 1/2 wavelength to increase the high frequency discrete dielectric filter of the medium width size according to claim 1, characterized in that, the side of two adjacent dielectric resonators is formed with the coupling slot perpendicular to the resonance through hole.
6. The high frequency discrete dielectric filter according to claim 1, wherein a metal shield is provided on one side of the filter, and the width of the dielectric filter is increased by 1/2 wavelength.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211531273.XA CN115764205A (en) | 2022-12-01 | 2022-12-01 | High-frequency discrete dielectric filter with 1/4 wavelength and 1/2 wavelength for increasing dielectric width dimension |
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| CN202211531273.XA CN115764205A (en) | 2022-12-01 | 2022-12-01 | High-frequency discrete dielectric filter with 1/4 wavelength and 1/2 wavelength for increasing dielectric width dimension |
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