CN202839909U - Communication radio frequency device and filter thereof - Google Patents
Communication radio frequency device and filter thereof Download PDFInfo
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- CN202839909U CN202839909U CN 201220286607 CN201220286607U CN202839909U CN 202839909 U CN202839909 U CN 202839909U CN 201220286607 CN201220286607 CN 201220286607 CN 201220286607 U CN201220286607 U CN 201220286607U CN 202839909 U CN202839909 U CN 202839909U
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Abstract
The utility model discloses a communication radio frequency device and a filter thereof. The filter comprises a first chamber, a second chamber and a coupling window and further comprises a first material resonator arranged in the first chamber and a second material resonator arranged in the second chamber, a coupling part comprises a first coupling portion arranged in the first chamber, a second coupling portion arranged in the second coupling chamber and a connection portion, the first coupling portion and the first chamber are matched to form a first equivalent magnetic flux window, a first magnetic field generated by the first material resonator penetrates through the first equivalent magnetic flux window, the second coupling portion and the second chamber are matched to form a second equivalent magnetic flux window, a second magnetic field generated by the second material resonator penetrates through the second equivalent magnetic flux window, and coupling of the first material resonator and the second material resonator is realized through the coupling part. The filter effectively reduces production cost.
Description
Technical field
The utility model embodiment relates to the signal process field, specifically relates to a kind of communication radio frequency device and filter thereof.
Background technology
As everyone knows, filter is applied in the signal transmission system, for example microwave communication, radar navigation, electronic countermeasures, satellite relay, missile guidance, test instrumentation etc., be used for extracting useful signal by filter, suppress useless interference signal, make communication equipment keep normal work.The performance of filter is mainly reflected in self subsidiary loss and to the inhibition degree of useless or interference signal, and the quality factor by resonator self determines, quality factor has another name called the Q value, and the Q value of filter determines that the loss of filter self reaches the inhibition degree to interference signal.
Metal material is because being easy to obtain, be easy to machine-shaping and the innate advantage such as cheap, during the design that the metal resonators of being made by metal material is used in microwave filter is the earliest used, and along with the development of microwave communication obtains to use widely.But the quality factor of metal resonators is relatively limited, and the Q value is relatively low, and is difficult to increase the Q value under the certain condition of resonant cavity volume.In order to address this problem, most of filter gradually adopts various ceramic materials with superior temperature stability and high Q value to come the alternative metals material, furthermore, in order to obtain higher quality factor, tend to add at ceramic material the material of high value, such as high rare earth material of price etc., other also relative complex of the related process such as sinter molding that relate to of ceramic material, cause ceramic dielectric resonator to hold at high price, but because ceramic dielectric resonator has higher Q value, and loss is lower, and it is little to the small product size of filter easily to satisfy present technical development, many demands such as the outer clutter inhibition of band that loss is low and higher, therefore, ceramic dielectric resonator has become most important and modal filter element.
In specific design, ceramic dielectric resonator usually adopts transverse electric mode ceramic resonator (or claiming TE mould ceramic resonator), but often needs to use a plurality of TE mould ceramic resonator common combinations to form the TE mode filter; Therefore, under the prerequisite that can't change the resonator use amount, because material and production technology former thereby cause its production cost further higher.
How outside satisfying the band that small product size is little, loss is low, higher clutter suppress and the prerequisite that can realize being coupled under, the resonator material that changes filter is replaced the TE mould ceramic resonator of ceramic material, with the use amount that reduces ceramic material and then reduce production costs, it is the difficult problem that the art personnel need solution badly.
The utility model content
The technical problem that the utility model mainly solves provides a kind of communication radio frequency device and filter thereof, so that realize coupling in the filter between the resonator of different materials.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of filter is provided, and this filter comprises the first cavity and the second cavity, is provided with the coupling window that is coupled be used to being communicated with between this first cavity and this second cavity.This filter also comprises the first material resonances device, the second material resonances device and male part.This first material resonances device is located in this first cavity; This second material resonances device is located in this second cavity; This male part comprises the first coupling part of being located in this first cavity, is located at the second coupling part in this second cavity and the convergence part that connects this first coupling part and this second coupling part.Wherein, this first coupling part cooperates to form the first equivalent magnetic flux window with this first cavity, this the first equivalent magnetic flux window is passed in the first magnetic field that this first material resonances device produces, this second coupling part cooperates to form the second equivalent magnetic flux window with this second cavity, this the second equivalent magnetic flux window is passed in the second magnetic field that this second material resonances device produces, so that this first material resonances device and this second material resonances device are realized coupling via this male part.
Wherein, this first material resonances device is metal resonators, and this second material resonances device is ceramic resonator.
For solving the problems of the technologies described above, another technical scheme that the utility model adopts is: a kind of communication radio frequency device is provided, this communication radio frequency device comprises above-mentioned filter, this filter is located at the transceiver circuit part of this communication radio frequency device, be used for signal is selected, this communication radio frequency device is single multiplexer, duplexer, splitter, mixer or tower amplifier.
The communication radio frequency device of the utility model embodiment and filter thereof be the mixed resonator of putting different materials of setting up in two cavitys of the adjacent setting of same filter, then, utilize male part to be coupled, wherein, the structure of this male part arranges according to the magnetic field characteristics of the resonator of different materials, pass the equivalent magnetic flux window that male part forms and make resonator produce magnetic field, thereby realize the coupling between the resonator of the different materials in two cavitys.The utility model satisfies under the prerequisite of the requirements such as the outer clutter inhibition of band that small product size is little, loss is low and higher, and the mixed resonator of having taken different materials also can be realized coupling effectively having reduced production cost in filter.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the mixed structural representation of taking the resonator part of the utility model embodiment filter;
Fig. 2 is the male part structural representation of filter shown in Figure 1;
Fig. 3 is another structural representation of male part of the utility model embodiment filter;
Fig. 4 is the mixed schematic flow sheet of taking coupling process of the resonator of the utility model embodiment filter;
Fig. 5 is that the utility model embodiment filter is in the anti-interference index test oscillogram of a certain frequency;
Fig. 6 is the transmission response oscillogram of filter shown in Fig. 1 embodiment;
Fig. 7 is the filter construction schematic diagram that all adopts ceramic resonator in the prior art;
Fig. 8 is that the Q value of the ceramic resonator of filter shown in Figure 7 is 15000 o'clock transmission response curve chart;
Fig. 9 is that the Q value of the ceramic resonator of filter shown in Figure 7 is 7000 o'clock transmission response curve chart;
Figure 10 is the structural representation of the utility model embodiment filter one preferred embodiment; And
Figure 11 is the transmission response curve chart of filter shown in Figure 10.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides a kind of filter, and this filter comprises the first cavity and the second cavity, is provided be used to the coupling window that is communicated with coupling between this first cavity and this second cavity.This filter also comprises the first material resonances device, the second material resonances device and male part.This first material resonances device is located in this first cavity; This second material resonances device is located in this second cavity; This male part comprises the first coupling part of being located in this first cavity, is located at the second coupling part in this second cavity and the convergence part that connects this first coupling part and this second coupling part.
In the specific works process, this first coupling part cooperates to form the first equivalent magnetic flux window with this first cavity, this the first equivalent magnetic flux window is passed in the first magnetic field that this first material resonances device produces, this second coupling part cooperates to form the second equivalent magnetic flux window with this second cavity, this the second equivalent magnetic flux window is passed in the second magnetic field that this second material resonances device produces, so that this first material resonances device and this second material resonances device are realized coupling via this male part.
It needs to be noted: this first material resonances device is metal resonators, and this second material resonances device is ceramic resonator.
The utility model embodiment forms respectively the mode of equivalent magnetic flux window at the first cavity and the second cavity by this male part, make and realize coupling between the resonator of filter different materials, thereby realized the mixed different resonator of use of taking of filter, effectively reduced production cost.Furthermore, the utility model embodiment adopts metal resonators to replace ceramic resonator, thereby has effectively reduced the production cost of filter.
The utility model embodiment also provides a kind of resonator of filter the mixed coupling process of taking, this filter comprises the first cavity and the second cavity, be provided with the first material resonances device in this first cavity, be provided with the second material resonances device in this second cavity, this resonator is mixed to be taken coupling process and comprises: offer the coupling window that is coupled be used to being communicated with between this first cavity and this second cavity; Male part is set, and this male part comprises the first coupling part of being located in this first cavity, is located at the second coupling part in this second cavity and the convergence part that connects this first coupling part and this second coupling part; Wherein, this first coupling part cooperates to form the first equivalent magnetic flux window with this first cavity, this the first equivalent magnetic flux window is passed with the first angle in the first magnetic field that this first material resonances device produces, this second coupling part cooperates to form the second equivalent magnetic flux window with this second cavity, this the second equivalent magnetic flux window is passed with the second angle in the second magnetic field that this second material resonances device produces, so that this first material resonances device and this second material resonances device are realized coupling via this male part.
As previously mentioned, preferably, this first material resonances device is metal resonators, and this second material resonances device is ceramic resonator.
The utility model embodiment forms respectively the mode of equivalent magnetic flux window at the first cavity and the second cavity by this male part, make and realize coupling between the resonator of filter different materials, thereby realized the mixed different resonator of use of taking of filter, furthermore, replace ceramic resonator by the employing metal resonators, thereby effectively reduced the production cost of filter.
The utility model embodiment also provides a kind of communication radio frequency device, this communication radio frequency device comprises above-mentioned filter, this filter is located at the transceiver circuit part of this communication radio frequency device, be used for signal is selected, this communication radio frequency device is single multiplexer, duplexer, splitter, mixer or tower amplifier.
That is to say, this communication radio frequency device is by adopting the method for male part, the first cavity and the second cavity at filter form respectively equivalent magnetic flux window, make and realize coupling between the resonator of filter different materials, especially can adopt metal resonators to replace original ceramic resonator, and effectively reduce the production cost of filter.
Below in conjunction with accompanying drawing the utility model embodiment is further described.
Embodiment one, see also Fig. 1, it is the mixed structural representation of taking the resonator part of the utility model embodiment filter, this filter is the TE mode filter, it includes but not limited to the first cavity 10, the second cavity 20, coupling window 30, male part 31, the first material resonances device 11 and the second material resonances device 21, wherein, for making things convenient for subsequent descriptions explanation, a plurality of semi-circular a plurality of arrows shown in respectively represent among Fig. 1 is the direction in the magnetic field that produces separately of this first material resonances device 11 and the second material resonances device 21 at a time.
In the present embodiment, the first cavity 10 and the second cavity 20 all can adopt electric conducting material to make, and are preferably metal.Be pointed out that, be the interval setting between the first cavity 10 and the second cavity 20, and can be equipped with in filter for cavity like many categories for example the 3rd cavity, the 4th cavity and sequentially " it " type setting of the 5th cavity.
The first material resonances device 11 is located in the first cavity 10, the second material resonances device 21 is located in the second cavity 20, and it should be noted that, material inequality between the first material resonances device 11 and the second material resonances device 21, the combination of two resonators that it can make for any two kinds of different materials in this area.In addition, any two kinds of the first material resonances device 11 and second material resonances devices 21 that different combination of materials becomes, the situations such as the direction in the magnetic field of its formation, intensity size and Distribution of Magnetic Field are the property of there are differences generally, male part 31 is then adjusted according to the situations such as direction, intensity size and Distribution of Magnetic Field in its corresponding magnetic field, thereby further improves its coupling effect.
During work:
The first equivalent magnetic flux window A is passed in the first magnetic field that the first material resonances device 11 produces, the second equivalent magnetic flux window B is passed in the second magnetic field that the second material resonances device 21 produces, so that the first material resonances device 11 and the second material resonances device 21 are realized coupling via male part 31;
Wherein, in the situation that direction, intensity size and the Distribution of Magnetic Field in the first magnetic field and the second magnetic field are fixed substantially, can adjust the first equivalent magnetic flux window A and the second equivalent magnetic flux window B, make the first magnetic field by the first magnetic flux (being magnetic field energy) of the first equivalent magnetic flux window A, be complementary with second magnetic flux (being magnetic field energy) of the second magnetic field by the second equivalent magnetic flux window B, thus the transmission of realization microwave energy.
The utility model embodiment forms respectively the first equivalent magnetic flux window A and the second equivalent magnetic flux window B by male part 31 at the first cavity 10 and the second cavity 20, when the resonator of different materials is set in the filter, effect by male part 31 makes realization coupling between the mixed resonator of taking, thereby has effectively reduced the production cost of filter.
Embodiment two, please consult Fig. 2 in conjunction with Fig. 1, Fig. 2 is the male part structural representation of filter shown in Figure 1, and this filter includes but not limited to the first cavity 10, the second cavity 20, coupling window 30, male part 31, the first material resonances device 11 and the second material resonances device 21.
In the present embodiment, it should be noted that, the first material resonances device 11 is metal resonators, the second material resonances device 21 is ceramic resonator, please further consult Fig. 1, be not difficult to find out: the first material resonances device 11 is located in the first cavity 10, and the first magnetic field of its generation is mutually vertical with the direction in the second magnetic field of generation of the second material resonances device 21 in being located at the second cavity 20.And made on the basis of moulding at the first material resonances device 11 and the second material resonances device 21, in order to obtain as much as possible maximum magnetic flux to carry out the transmission of microwave energy, the first equivalent magnetic flux window A is mutually vertical with the plane at the second equivalent magnetic flux window B place.
Particularly, the bottom surface of the first coupling part 311 and the first cavity 10 is electrically connected, the main body 3111 of the first coupling part 311 and the setting of the first material resonances device 11 intervals and the straight line at its place and the axial line of the first material resonances device 11 are parallel to each other, and cooperate formation the first equivalent magnetic flux window A by the bottom surface of convergence part 313, the first coupling part 311, the first cavity 10 and the sidewall of the first cavity 10; And in the second cavity 20, the bottom surface electric connection of the different end in the second coupling part 312 and convergence part 313 and coupling window 30, the main body 3121 of the second coupling part 312 is mutually vertical with the axial line of the second material resonances device 21 with the straight line at the setting of the second material resonances device 21 intervals and its place, by the bottom surface cooperation formation second equivalent magnetic flux window B of convergence part 313, the second coupling part 312 and coupling window 30.
Wherein, the first coupling part 311 can by be spirally connected, riveted joint or clamping and the first cavity 10 be electrically connected, and the second coupling part 312 also can by be spirally connected, the bottom surface of riveted joint or clamping and coupling window 30 or with the sidewall electric connection of described the second cavity 20.
In addition, what need special instruction is, filter generally comprises signal input part and signal output part to carry out the transmission of signal and microwave energy, and metal resonators is at least two, and be located at respectively signal input part and signal output part place, that is to say, utilize metal resonators to substitute the ceramic resonator that originally was positioned at signal input part and signal output part place, further to reduce production costs.
During work:
The first material resonances device 11(is metal resonators) the first magnetic field of producing passes the first equivalent magnetic flux window A, the second material resonances device 21(is ceramic resonator) the second magnetic field of producing passes the second equivalent magnetic flux window B, so that metal resonators and ceramic resonator are realized coupling via male part 31.
The utility model embodiment forms respectively the first equivalent magnetic flux window A and the second equivalent magnetic flux window B by male part 31 at the first cavity 10 and the second cavity 20, when metal resonators being set when replacing original ceramic resonator in the filter, effect by male part 31 makes realization coupling between mixed metal resonators of taking and the ceramic resonator, reduced the use to ceramic resonator, thereby effectively reduced the production cost of filter, and metal resonators is because its volume is little and reliability is high, thereby improved the unfailing performance of filter and realized light littleization of product.
Embodiment three, see also Fig. 3, are another structural representations of male part of the utility model embodiment filter.
Be with embodiment two differences, guaranteeing under the prerequisite that the first material resonances device 11 and the second material resonances device 21 are realized being coupled:
The first coupling part 311 comprises the first kink 3112 and the second kink 3113, the bottom surface direction of the first kink 3,112 313 past first cavitys 10 from the convergence part is extended and is connected with an end of the second kink 3113, the sidewall of the other end of the second kink 3113 and the first cavity 10 is electrically connected to realize the electric connection of the first coupling part 311 and the first cavity 10, and finally the sidewall by convergence part 313, the first kink 3112, the second kink 3113 and the first cavity 10 cooperates formation the first equivalent magnetic flux window A; And in the second cavity 20, the second coupling part 312 comprises the 3rd kink 3122, the 4th kink 3123 and connecting portion 3124, the bottom surface direction of the 3rd kink 3,122 313 past second cavitys 20 from the convergence part is extended and is connected with an end of the 4th kink 3123, the other end of the 4th kink 3123 is electrically connected to realize the electric connection of the second coupling part 312 and the second cavity 20 by the sidewall of connecting portion 3124 and the second cavity 20, finally by convergence part 313, the 3rd kink 3122, the sidewall of the 4th kink 3123 and the second cavity 20 cooperates formation the second equivalent magnetic flux window B.
It is described that the specific works process of the utility model embodiment also sees also Fig. 2 embodiment, and therefore not to repeat here.
The utility model embodiment forms respectively the first equivalent magnetic flux window A and the second equivalent magnetic flux window B by male part 31 at the first cavity 10 and the second cavity 20, when metal resonators being set when replacing original ceramic resonator in the filter, effect by male part 31 makes realization coupling between mixed metal resonators of taking and the ceramic resonator, reduce the use to ceramic resonator, thereby effectively reduced the production cost of filter.In addition, because the reliability of metal resonators is high and its volume is less than normal, so that the reliability of filter also is improved, volume is realized light littleization.
Embodiment four, see also Fig. 4, it is the mixed schematic flow sheet of taking coupling process of resonator of the utility model embodiment filter, in the present embodiment, this filter includes but not limited to the first cavity and the second cavity, be provided with the first material resonances device in the first cavity, be provided with the second material resonances device in the second cavity, the resonator of filter is mixed to be taken coupling process and comprises:
Step S400 offers between the first cavity and the second cavity be used to the coupling window that is communicated with coupling;
Step S401 arranges male part, and this male part comprises to be located at the first interior coupling part of the first cavity, to be located at the second coupling part in the second cavity and to connect the first coupling part and the convergence part of the second coupling part.
The course of work of the present embodiment comprises:
The first coupling part cooperates to form the first equivalent magnetic flux window with the first cavity, and the first equivalent magnetic flux window is passed with the first angle in the first magnetic field that the first material resonances device produces;
And the second coupling part cooperates to form the second equivalent magnetic flux window with the second cavity, the second equivalent magnetic flux window is passed with the second angle in the second magnetic field that the second material resonances device produces, so that the first material resonances device and the second material resonances device are realized coupling via male part.
In step S401, specifically also comprise: the bottom surface of the first coupling part and the first cavity is electrically connected, and the main body that makes the first coupling part and the setting of the first material resonances device interval and the straight line at its place and the axial line of the first material resonances device are parallel to each other; The end that the second coupling part and convergence part is different and the bottom surface of coupling window are electrically connected, and make the main body of the second coupling part mutually vertical with the axial line of the second material resonances device with the straight line at the setting of the second material resonances device interval and its place.
What deserves to be explained is, the first material resonances device is metal resonators, and the second material resonances device is ceramic resonator, and in other embodiments, the combination between the resonator that also can make for other dissimilar materials is not construed as limiting at this.Wherein, metal resonators is at least two, and the material of male part is electric conducting material such as metal etc.Furthermore, the convergence part needs unsettled through coupling window, cooperate with the sidewall of the bottom surface by convergence part, the first coupling part, the first cavity and the second cavity to form the first equivalent magnetic flux window, and the bottom surface by convergence part, the second coupling part and coupling window cooperates and forms the second equivalent magnetic flux window.
The utility model embodiment forms respectively the first equivalent magnetic flux window and the second equivalent magnetic flux window by male part at the first cavity and the second cavity, when metal resonators being set when replacing original ceramic resonator in the filter, effect by male part makes realization coupling between mixed metal resonators of taking and the ceramic resonator, reduce the use to ceramic resonator, thereby effectively reduced the production cost of filter; Furthermore, because the reliability of metal resonators is high and its volume is less than normal, so that the reliability of filter also is improved, and its volume realizes light littleization, and the filter of the utility model embodiment has more practicality.
Embodiment five, the utility model embodiment also provides a kind of communication radio frequency device that adopts above-mentioned filter, wherein this filter is located at the transceiver circuit part of communication radio frequency device, be used for signal is selected, particularly, communication radio frequency device can be single multiplexer, duplexer, splitter, mixer or tower amplifier etc., in the scope that the art personnel understand, is not construed as limiting.
Seeing also Fig. 5, is that the utility model embodiment filter is in the anti-interference index test oscillogram of a certain frequency.
Wherein, take frequency 2335MHz as example, communication radio frequency device and filter thereof are carried out separately the test of anti-interference filter product index, be not difficult to find out from Fig. 5, the communication radio frequency device of the utility model embodiment and the insertion loss of filter is little, the inhibition of the outer clutter of band is larger, thus higher quality factor possessed.
Below in conjunction with different application and test data so that the front described filter of a plurality of embodiment is described.
Use one, please consult Fig. 6 in conjunction with Fig. 1, in the filter that only adopts the first cavity 10 shown in Figure 1 and the second cavity 20, in this metal resonators 11 of the first cavity 10 interior installations, at the second cavity 20 interior installation ceramic resonators 21, then between the first cavity 10 and the second cavity 20, offer coupling window 30 and the described male part of the arbitrary embodiment in front is set, the centre frequency of this filter is 2335MHz, about bandwidth 10MHz, during test, regulate the coupling amount intensity between two resonators, its regulative mode sees also noted earlier, in the scope that the art personnel understand, does not give unnecessary details.At this moment, can obtain transmission response oscillogram shown in Figure 6.
Use two, see also Fig. 7 to Fig. 9, in the prior art, in order to satisfy the requirement of signal transmission high-fidelity, production one filter as shown in Figure 7, wherein, this application adopts nine cavitys, and carries out coupled transfer by increasing transmission zero between several cavitys therein, such as the position of the structure that is similar to electric capacity among Fig. 7.Generally speaking, the performance index of filter require as shown in Table 1:
Table one
Filter shown in Figure 7 is tested, it obtains transmission response curve shown in Figure 8, wherein, the Q value of each resonator is 15000, M1 point in the curve and M2 point are that passband insertion loss, M3 point and the M4 point of filter suppresses for the outer clutter of the passband of filter and the M5 point is the return loss of filter, be not difficult to find out, filter construction shown in Figure 7 satisfies the index request of low-loss, the outer clutter inhibition of high-band.In addition, when the Q value is 7000, the transmission response curve that then obtains as shown in Figure 9, at this moment, M3 point and M4 point for the outer clutter of the passband of filter suppress to be about-102dB about, filter construction shown in Figure 7 still satisfies the index request that low-loss, the outer clutter of high-band suppress.
Be not difficult to find out from Fig. 8, the insertion loss value of emulation when the Q value is 15000 is to the maximum about 2.1223dB, and the index request in the table one is not more than 3.5dB, see also Figure 10 and Figure 11, in this application embodiment, this filter comprises the first material resonances device 41, the second material resonances device 42, signal input part and signal output part, the first material resonances device is that metal resonators and its can be three, five or more, be eight and arrange alternately with the first material resonances device and the second material resonances device is ceramic resonator and its number, as shown in figure 10, wherein two the first material resonances devices 41 are positioned at signal input part and signal output part.
Particularly, the first straight line that forms between the first material resonances device 41 of signal input part and the first material resonances device 41 at signal output part is provided with five the second material resonances devices 42 that are interconnected, and remaining three the first material resonances devices 41 and three the second material resonances devices 42 arrange and form the second straight line alternately, wherein, the first straight line parallel is in the second straight line, its concrete connected mode sees also shown in Figure 10, in the scope that the art personnel understand, does not give unnecessary details.
Wherein, the Q value of the metal resonators of the first material resonances device 41 is that the Q value of the ceramic resonator of 7000, the second material resonances devices 42 is 15000.When testing, can obtain transmission curve response diagram shown in Figure 11, as previously mentioned, the M1 point in the curve and M2 point are that passband insertion loss, M3 point and the M4 point of filter suppresses for the outer clutter of the passband of filter and the M5 point is the return loss of filter.Be not difficult to find out from Figure 11, by the effect of the described male part of the utility model embodiment, can use the ceramic resonator in the metal resonators place of filters, and it still satisfies the requirements such as index request of low-loss and the outer clutter inhibition of high-band.
The utility model satisfies under the prerequisite of the requirements such as the outer clutter inhibition of band that small product size is little, loss is low and higher, reduced the use to ceramic resonator, thereby effectively reduced the production cost of filter, and because the reliability of metal resonators is high and its volume is less than normal, so that the reliability of filter also is improved, and its volume is realized light littleization, and the filter of the utility model embodiment has more practicality.
Used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand core concept of the present utility model; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. a filter is characterized in that, comprises the first cavity and the second cavity, is provided be used to the coupling window that is communicated with coupling between described the first cavity and described the second cavity, and described filter also comprises:
The first material resonances device is located in described the first cavity;
The second material resonances device is located in described the second cavity;
Male part, described male part comprise the first coupling part of being located in described the first cavity, are located at the second coupling part in described the second cavity and the convergence part that connects described the first coupling part and described the second coupling part;
Wherein, described the first coupling part cooperates to form the first equivalent magnetic flux window with described the first cavity, the described first equivalent magnetic flux window is passed in the first magnetic field that described the first material resonances device produces, described the second coupling part cooperates to form the second equivalent magnetic flux window with described the second cavity, the described second equivalent magnetic flux window is passed in the second magnetic field that described the second material resonances device produces, so that described the first material resonances device and described the second material resonances device are realized coupling via described male part.
2. filter according to claim 1 is characterized in that, described the first material resonances device is metal resonators, and described the second material resonances device is ceramic resonator.
3. filter according to claim 2, it is characterized in that, the first magnetic field that described the first material resonances device produces is mutually vertical with the direction in the second magnetic field of the generation of described the second material resonances device, and the described first equivalent magnetic flux window is mutually vertical with the plane at the described second equivalent magnetic flux window place.
4. filter according to claim 3 is characterized in that, the material of described male part is electric conducting material, and described convergence part is unsettled through described coupling window:
The bottom surface of described the first coupling part and described the first cavity is electrically connected, the main body of described the first coupling part and the setting of described the first material resonances device interval and the straight line at its place and the axial line of described the first material resonances device are parallel to each other, and cooperate formation the described first equivalent magnetic flux window by the bottom surface of described convergence part, described the first coupling part, described the first cavity and the sidewall of described the first cavity;
The end that described the second coupling part and described convergence part are different and the bottom surface of described coupling window are electrically connected, the main body of described the second coupling part is mutually vertical with the axial line of described the second material resonances device with the straight line at the setting of described the second material resonances device interval and its place, by the bottom surface cooperation formation described second equivalent magnetic flux window of described convergence part, described the second coupling part and described coupling window.
5. filter according to claim 3 is characterized in that, the material of described male part is electric conducting material, and described convergence part is unsettled through described coupling window:
Described the first coupling part comprises the first kink and the second kink, described the first kink is connected toward the bottom surface direction extension of described the first cavity and with an end of described the second kink from described convergence part, the sidewall of the other end of described the second kink and described the first cavity is electrically connected to realize the electric connection of described the first coupling part and described the first cavity, and cooperates formation the described first equivalent magnetic flux window by the sidewall of described convergence part, described the first kink, described the second kink and described the first cavity;
Described the second coupling part comprises the 3rd kink and the 4th kink, described the 3rd kink is connected toward the bottom surface direction extension of described the second cavity and with an end of described the 4th kink from described convergence part, the sidewall of the other end of described the 4th kink and described the second cavity is electrically connected to realize the electric connection of described the second coupling part and described the second cavity, and cooperates formation the described second equivalent magnetic flux window by the sidewall of described convergence part, described the 3rd kink, described the 4th kink and described the second cavity.
6. according to claim 4 or 5 described filters, it is characterized in that, described the first coupling part by be spirally connected, riveted joint or clamping and described the first cavity be electrically connected, described the second coupling part by be spirally connected, the bottom surface of riveted joint or clamping and described coupling window or with the sidewall electric connection of described the second cavity.
7. according to claim 4 or 5 described filters, it is characterized in that, the material of described male part is metal.
8. filter according to claim 3, it is characterized in that, described filter comprises signal input part and signal output part, and described the first material resonances device is at least two, and described the first material resonances device is located at respectively described signal input part and described signal output part.
9. filter according to claim 3, it is characterized in that, described filter comprises signal input part and signal output part, described the first material resonances device is at least three, described the second material resonances device is a plurality of and arranges alternately with described the first material resonances device, is located at respectively described signal input part and described signal output part for two in three described the first material resonances devices.
10. communication radio frequency device, it is characterized in that, described communication radio frequency device comprises according to claim 1～9 each described filters, described filter is located at the transceiver circuit part of described communication radio frequency device, be used for signal is selected, described communication radio frequency device is single multiplexer, duplexer, splitter, mixer or tower amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220286607 CN202839909U (en) | 2012-06-18 | 2012-06-18 | Communication radio frequency device and filter thereof |
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| CN 201220286607 CN202839909U (en) | 2012-06-18 | 2012-06-18 | Communication radio frequency device and filter thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760922A (en) * | 2012-06-18 | 2012-10-31 | 深圳市大富科技股份有限公司 | Communication radio-frequency device, as well as filter and resonator overlapped coupling method of filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760922A (en) * | 2012-06-18 | 2012-10-31 | 深圳市大富科技股份有限公司 | Communication radio-frequency device, as well as filter and resonator overlapped coupling method of filter |
| CN102760922B (en) * | 2012-06-18 | 2015-03-18 | 深圳市大富科技股份有限公司 | Communication radio-frequency device, as well as filter and resonator overlapped coupling method of filter |
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