CN206698194U - Bandpass filter - Google Patents

Abstract

It the utility model is related to wireless communication technology field, and in particular to bandpass filter.Medium body including a cuboid or cube structure, two opposite faces are provided with three through holes side by side in the medium body, three through holes are circular hole, either side provided with through hole is provided with metal feed layer, and the medium body with provided with being respectively equipped with input and output electrode on the perpendicular side in that face of metal feed layer, the metal feed layer includes three rectangle feed tabs and the feed tab of a Contraband font, two of which rectangle feed tab is separately positioned on through hole both sides up and down, another rectangle feed tab is arranged on the side of three through hole one end, the Contraband font feed tab is arranged on the side of three through hole other ends.The utility model improves the filter quality of wave filter, and is effectively improved the antijamming capability of wave filter.

Description

Bandpass filter

Technical field

It the utility model is related to wireless communication technology field, and in particular to bandpass filter.

Background technology

As wireless communication technology develops, increasing electronic equipment employs wireless transmission function.In radio wave In by electric wave carrier wave load data, film data, then launched by transmission equipment or be received back to Lai then transmit process has Many different frequencies exist simultaneously, and relative interference effect is caused for connecing equipment, to ensure number or data in the process Frequency channels can be led to by identical to receive and maintain the good quality of reception, a kind of filtering is put into wireless transmission or receiving circuit Component be called wave filter (Filter), the wave filter of main flow can divide LTCC, SAW, dielectric filter, ceramic filtering according to processing procedure at present Ripple device, quartz filter etc., and ceramic filter is using porous structural made of ceramics.

Existing ceramic filter is because its wave frequency wavelength is short, easily with peripheral material or autologous generation resonance effects to filter Ripple device passage, which produces, to be disturbed, the signal attenuation ability being easily affected outside band channels in its filtering, and filter quality is big It is big to reduce.

The content of the invention

For this reason, it may be necessary to provide a kind of bandpass filter, pass through the structure to medium body and the metal electrode layer of coating Design improves, and so as to greatly improve the filter quality of wave filter, and is effectively improved the antijamming capability of wave filter.

To achieve the above object, the utility model provides bandpass filter, including a cuboid or cube structure Medium body, two opposite faces are provided with three through holes side by side in the medium body, and three through holes are circular hole, provided with through hole Either side be provided with metal feed layer, and the medium body with provided with the perpendicular side in that face of metal feed layer respectively Provided with input and output electrode, the metal feed layer includes three rectangle feed tabs and the feed tab of a Contraband font, wherein two Individual rectangle feed tab is separately positioned on through hole, and both sides, another rectangle feed tab are arranged on three through holes one up and down The side at end, the Contraband font feed tab are arranged on the side of three through hole other ends.

Further, the center of circle of three through holes is on same straight line and is provided with being somebody's turn to do for through hole with medium body The long edge in face is parallel.

Further, in three through holes, the diameter of two through holes on both sides is more than a middle through hole Diameter.

Further, the Contraband font feed tab is close to three edges setting of one side of medium body.

Further, input electrode is at right angles arranged in the two-phase vertical side of medium body, and output electrode is rectangular It is arranged in the two-phase vertical side of medium body.

Prior art is different from, above-mentioned technical proposal is by designing a bandpass filter, by being set in medium body Three through holes are counted, and the one side with through hole sets metal conductor layer wherein, and the medium body provided with metal with presenting Input and output electrode is respectively equipped with the perpendicular side in that face of electric layer, the metal feed layer includes three rectangle feed tabs With the feed tab of a Contraband font, two of which rectangle feed tab is separately positioned on through hole both sides up and down, makes its capacitive character shape Into the concatenation coupled capacitor in equivalent circuit, set the feed tab of Contraband font to be total to ground electrode using it and increase close to making its capacitive character Reduction property forms the inductive couplings of equivalent circuit, sets another rectangle feed tab to be arranged on three through hole one end Side, the shadow of equivalent filter circuit is adjusted to the frequency of resonant cavity using its capacitive character, so that whole filter construction Design possesses efficient band-pass function filtering characteristic.

Brief description of the drawings

Fig. 1 is the dimensional structure diagram of the present embodiment.

Fig. 2 is the dimensional structure diagram of the present embodiment（Band broken section）.

Fig. 3 is another dimensional structure diagram of the present embodiment.

Fig. 4 is the equivalent circuit diagram of the present embodiment.

Fig. 5 is the structure electrical performance characteristics of the present embodiment.

Embodiment

To describe the technology contents of technical scheme, construction feature, the objects and the effects in detail, below in conjunction with specific reality Apply example and coordinate accompanying drawing to be explained in detail.

Refer to the medium sheet of Fig. 1 to Fig. 3, the bandpass filter of the present embodiment, including a cuboid or cube structure Body 1, shown medium body 1 have six faces, respectively upper side 11, downside 12, leading flank 13, trailing flank 14, right flank 15, left surface 16, in the present embodiment, the leading flank 13 of medium body 1 and relative trailing flank 14 pass through provided with three side by side Perforation 21,22,23, that is to say, that three through holes 21,22,23 are leading flank 13 and the trailing flank for penetrating whole medium body 1 Space between 14, three through holes 21,22,23 are circular hole.The center of circle of three through holes 21,22,23 is in same straight The long edge in the face that through hole is provided with line and with medium body is parallel.Further, in three through holes, the two of both sides The diameter of individual through hole 21,23 is more than the diameter of a middle through hole 22.

In the present embodiment, leading flank 13 is provided with metal feed layer 3, in an other embodiment, the metal feed layer 3 Trailing flank 14 can also be arranged on, that is to say, that metal feed layer 3 is may be provided with the either side provided with through hole.

In the present embodiment, right flank 15, left surface 16 and the downside 12 of the medium body 1 are provided with input and output electricity Pole, and right flank 15, left surface 16 and downside 12 are perpendicular with the leading flank 13 provided with metal feed layer 3, input electricity Pole 41 is at right angles arranged on the downside 12 and left surface 16 of medium body 1, and output electrode 42 is at right angles arranged on medium sheet On the downside 12 and right flank 15 of body 1, downside 12 is two-phase vertical side, downside 12 and right flank 15 with left surface 16 For two-phase vertical side.The developed surface of input electrode 41 and output electrode 42 is in frame-type respectively.

The metal feed layer 3 includes three rectangle feed tabs 31,31,33 and the feed tab 34 of a Contraband font, wherein Two rectangle feed tabs 32,33 are separately positioned on through hole 21, about 22 both sides, and two rectangle feed tabs 32,33 are presented It is horizontally disposed, parallel to through hole 21,22.Two rectangle feed tabs 32,33 are set its capacitive character is formed in equivalent circuit Concatenation coupled capacitor.

Another rectangle feed tab 31 is arranged on the side of three one end of through hole 21,22,23, in the present embodiment In, the rectangle feed tab 31 is arranged on the side of through hole 21, and rectangle feed tab 31 is presented vertical direction and set.Length is set Square feed tab 31 adjusts the shadow of equivalent filter circuit to the frequency of resonant cavity using its capacitive character.

The Contraband font feed tab 34 is arranged on the side of three other ends of through hole 21,22,23.In the present embodiment, The semi-surrounding of Contraband font feed tab 34 through hole 22,23, the Contraband font feed tab 34 are close to one side of medium body Three edges set, that is to say, that the outer ledge of the Contraband font feed tab 34 and the right edge of medium body leading flank 13 It is all overlapping, partly overlapped with the upper edge of leading flank, it is overlapping with the lower edge portions of leading flank.The feedback of Contraband font is set Electric piece is total to ground electrode using it and increased close to the inductive couplings for making its capacitive character reduction property form equivalent circuit.

Through hole, metal feed layer and its feed tab, the knot of input and output electrode in the whole medium body of the present embodiment Structure designs, and mutual matching relationship so that the design of the whole filter construction of the present embodiment possesses efficient band Logical function filtering characteristic.

With reference to shown in figure 4, the equivalent circuit diagram of the present embodiment is shown in the figure, and the equivalent circuit includes electric capacity C1, electricity Hold C2, electric capacity C4, electric capacity C21, electric capacity C65, electric capacity C29, electric capacity C30, inductance L2, inductance L4, inductance L59, two of which length Square feed tab 32,33 is separately positioned on through hole 21, about 22 both sides, and two rectangle feed tabs 32,33 presentation levels are set Put, parallel to through hole 21,22.Using make its into capacitive character formed this equivalent circuit C65 concatenate coupled capacitor;

The Contraband font feed tab 34 is arranged on the side of three other ends of through hole 21,22,23.In the present embodiment, The semi-surrounding of Contraband font feed tab 34 through hole 22,23, the Contraband font feed tab 34 are close to one side of medium body Three edges set, that is to say, that the outer ledge of the Contraband font feed tab 34 and the right edge of medium body leading flank 13 It is all overlapping, partly overlapped with the upper edge of leading flank, it is overlapping with the lower edge portions of leading flank.Ground electrode is total to using it Increase the inductive couplings close to the L59 for making its capacitive character reduction property form this equivalent circuit;

Another rectangle feed tab 31 is arranged on the side of three one end of through hole 21,22,23, in the present embodiment In, the rectangle feed tab 31 is arranged on the side of through hole 21, and rectangle feed tab 31 is presented vertical direction and set.Utilize it The C21 of shape equivalent circuit electric capacity, can change the frequency of C2 and L2 regulation resonant cavities, and completion possesses band-pass function filtering characteristic.

With reference to shown in figure 5, the figure illustrates the structure electrical performance characteristics of the present embodiment, and the figure illustrates the knot of the present embodiment Structure electrical performance characteristics, it can be seen that the structure design of the present embodiment can realize standby band-pass function filtering work(well Can, whole indicatrix smooth steady, and noiseproof feature is good, substantially increases the filter quality of wave filter.

Sign curve represents that wave filter crosses band and Out-of-band rejection characteristic in Figure 5, and 8,9,10,11 numerical value of sign point are very low to be It is to have to suppress index well.

In the present embodiment, the making of the feed tab of the feed layer can use typography or etch process complete Into.Its flow is as follows when making feed tab using typography：

Web plate is set in the medium body of printing, and web plate is from gap 2mm between medium body, using scraper by under web plate Metal material is printed in medium body by pressure.After drying, feed tab then prints completion.

Then the design of designed feed tab is covered on photographic plate through overexposure when making feed tab using etch process, Then it is disposed in medium body, feed tab is etched in medium body using etching machine.

It should be noted that herein, such as first and second or the like relational terms are used merely to a reality Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to Nonexcludability includes, so that process, method, article or terminal device including a series of elements not only include those Key element, but also the other element including being not expressly set out, or it is this process, method, article or end also to include The intrinsic key element of end equipment.In the absence of more restrictions, limited by sentence " including ... " or " including ... " Key element, it is not excluded that other key element in the process including the key element, method, article or terminal device also be present.This Outside, herein, " being more than ", " being less than ", " exceeding " etc. are interpreted as not including this number；" more than ", " following ", " within " etc. understand It is to include this number.

Although the various embodiments described above are described, those skilled in the art once know basic wound The property made concept, then other change and modification can be made to these embodiments, so the foregoing is only reality of the present utility model Example is applied, not thereby limits scope of patent protection of the present utility model, it is every to utilize the utility model specification and accompanying drawing content The equivalent structure or equivalent flow conversion made, or other related technical areas are directly or indirectly used in, similarly include Within scope of patent protection of the present utility model.

Claims (5)

1. bandpass filter, it is characterised in that：Medium body including a cuboid or cube structure, in the medium body Two opposite faces are provided with three through holes side by side, and three through holes are circular hole, and the either side provided with through hole is presented provided with metal Electric layer, and the medium body with provided with being respectively equipped with input and output electrode on the perpendicular side in that face of metal feed layer, it is described Metal feed layer includes three rectangle feed tabs and the feed tab of a Contraband font, and two of which rectangle feed tab is set respectively The both sides above and below through hole, another rectangle feed tab are arranged on the side of three through hole one end, the Contraband font feedback Electric piece is arranged on the side of three through hole other ends.

2. bandpass filter according to claim 1, it is characterised in that：The center of circle of three through holes is in same straight The long edge in the face that through hole is provided with line and with medium body is parallel.

3. bandpass filter according to claim 1, it is characterised in that：In three through holes, two of both sides are passed through The diameter of perforation is more than the diameter of a middle through hole.

4. bandpass filter according to claim 1, it is characterised in that：The Contraband font feed tab is close to medium body one Three edges of individual side are set.

5. bandpass filter according to claim 1, it is characterised in that：Input electrode is at right angles arranged on medium body In two-phase vertical side, output electrode is at right angles arranged in the two-phase vertical side of medium body.