CN201490978U

CN201490978U - Modulatable band-pass diplex filter

Info

Publication number: CN201490978U
Application number: CN2009201760213U
Authority: CN
Inventors: 黄信龙; 潘俊宪
Original assignee: SHUNTAI ELECTRONICS TECHNOLOGY Co Ltd
Current assignee: SHUNTAI ELECTRONICS TECHNOLOGY Co Ltd; Soontai Tech Co Ltd
Priority date: 2009-09-08
Filing date: 2009-09-08
Publication date: 2010-05-26
Anticipated expiration: 2019-09-08

Abstract

The utility model relates to a modulatable band-pass diplex filter, an input connector which is connected in parallel with a filter circuit and a plurality of groups of modulating circuits, wherein the filter circuit consists of an inductor and a capacitor; the output end of the filter circuit is connected with an output connector; the modulating circuits can be formed by matching low-pass filter circuits with high-pass filter circuits or resonant cavity circuits; and the output end and the input end of each modulating circuit are respectively connected with a control switch which simultaneously switches by using different input voltages, therefore, the filter effect of different frequency points can be achieved by the change of different voltages and the practical convenience can be enhanced in the whole implementation and use.

Description

Can modulate band colludes to duplexer filter

Technical field

The utility model relates to a kind of band of modulating and colludes to duplexer filter, relate in particular to and a kind ofly can allow the user utilize different input voltages controls to switch the filter effect that reaches different frequency point, and collude to the duplexer filter innovative design at its whole band modulated that more increases the practical effect characteristic in use of implementing in using.

Background technology

Along with scientific and technological progress, digital product is the development trend of following home network in conjunction with computer and digital multimedia equipment, at present in the home-network linkups Developing Trend in Technology, except existing radio area network (Wireless Local Area Network, WLAN) outside the technology, also comprise hyperfrequency (UWB), power line network (HomePlug) and multimedia over Coax Alliance (Multimedia over CoaxAlliance, network technology MoCA) etc.; Wherein, the network technology of multimedia over Coax Alliance be in January, 2004 by how tame cable television operators, the satellite television dealer, the network equipment vendor is total to the technology alliance of group, mainly be to actively promote to utilize the family expenses coaxial cable to link TV, digital multimedia equipment, to be used for bi-directional multi-medium file and application service, purpose is with phone, network, cable TV (CATV), satellite community antenna system (Satellite Master Antenna Television SystemSMATV) and radio area network (WLAN) etc., the network technology that sees through multimedia over Coax Alliance (MoCA) is incorporated into coaxial cable, to allow the common people more increase practical convenient effect characteristic on life is used.

And the network technology of above-mentioned multimedia over Coax Alliance (MoCA) is on it uses, because various signal via the coaxial cable transmission, after input multimedia router, it is carried out the filtering action in using to go up except need utilize the filter of different filter effects respectively, to obtain outside the required frequency range, still need and intercept the frequency range of 975MHz～1525MHz, to meet the working frequency range of multimedia over Coax Alliance (MoCA), make when described multimedia router desires to be connected to TV or various different digital multimedia equipment, the different filter of all need arranging in pairs or groups, perhaps connect diverter switch in addition, and the dealer conveniently assembles for asking modularization, make when described filter module making is dispatched from the factory, see also shown in the existing structural representation of Fig. 6, it all is to be provided with several low-pass filter circuits 71 according to different filtering frequency ranges respectively in a modular wave filter 7, number bandwidth-limited circuit 72 etc., when different user demand, make on its different low-pass filter circuits 71 or bandwidth-limited circuit 72 that are connected to described modular wave filter 7, to have the filter function of required different frequency point.

Yet, though can reaching, above-mentioned modular wave filter supplies in being connected on its set different low-pass filter circuits or bandwidth-limited circuit, the expection effect that can have different frequency point filtering demand, find but also implement to use in its practical operation, described modular wave filter is because for cooperating the bandpass filtering of different frequency point, need make the array bandwidth-limited circuit, cause bulky, in being applied in different user demands, during the filtering of different frequency point, be connected in the output port of required Frequency point filter circuit again with joint by the user, cause its economic benefit low, the cost waste, and using operational very big inconvenience, cause and make it still have great room for improvement person in integral body.

Therefore, in view of this inventor adheres to for many years the abundant of these relevant industries and designs and develops and the actual fabrication experience, is studied improvement at existing structure and disappearance, provide a kind of band of modulating to collude, in the hope of reaching the purpose person of better practical value to duplexer filter.

Summary of the invention

The utility model can be modulated band and collude to duplexer filter, it lies in input adapter and is parallel with filter circuit and array modulation circuit, this filter circuit is made up of inductance and electric capacity, and the output in filter circuit is connected with out splice going splice, this modulation circuit can be that low-pass filter circuit collocation high-pass filtering circuit is formed or is the resonant cavity circuit, and be connected with control switch all respectively in each modulation circuit output and input, this control switch can utilize the different voltage of input, is carried out synchronous switching; By this,, reach the filter effect of different frequency point, and can more increase practical convenience person its whole execution in the use with change by different voltages.

Description of drawings

Fig. 1 is a circuit box schematic diagram of the present utility model;

Fig. 2 is another embodiment circuit box schematic diagram of the present utility model;

Fig. 3 is a low-pass filter signal performance diagram of the present utility model;

Fig. 4 practices in 1000MHz bandpass filtered signal performance diagram for the utility model;

Fig. 5 practices in 1150MHz bandpass filtered signal performance diagram for the utility model;

The existing structural representation of Fig. 6.

The main element symbol description:

1 input adapter, 2 filter circuits

3 modulation circuits, 4 out splice going splices

5 control switchs, 6 joints

7 modular wave filters, 31 low-pass filter circuits

71 low-pass filter circuits, 72 bandwidth-limited circuits

32 high-pass filtering circuits, 33 resonant cavity circuit

331 electric capacity, 332 electric capacity

333 inductance, 334 electric capacity

Embodiment

For more complete and clearly disclose and make technology contents, goal of the invention that the utility model uses and the effect of reaching, be elaborated below, and see also described accompanying drawing and symbol.

At first, see also shown in Fig. 1 circuit box schematic diagram of the present utility model, the utility model lies in input adapter 1 and is parallel with filter circuit 2 and array modulation circuit 3, this filter circuit 2 is to be low-pass filter circuit or the high-pass filtering circuit of being made up of inductance and electric capacity, and is connected with out splice going splice 4 in the output of filter circuit 2; Wherein:

This modulation circuit 3, it can be the bandwidth-limited circuit that low-pass filter circuit 31 collocation high-pass filtering circuits 32 are formed, and see also shown in Fig. 2 another embodiment circuit box schematic diagram of the present utility model, and modulation circuit 3 also can be resonant cavity circuit 33 and forms, described resonant cavity circuit 33 lies in the two corresponding electric capacity 331 that output and input connect, 332 inductance 333 and electric capacity 334 that are connected with the array parallel connection, and be connected with control switch 5 all respectively in the output of modulation circuit 3 and input and connect, this control switch 5 is an IC wafer, it can utilize the different voltage of input to switch synchronously, to select connecting which group modulation circuit 3, the output in modulation circuit 3 is connected with joint 6 again.

Thus, make when the utility model is installed on the Network Transmission that is applied to (MoCA) standard in the multimedia router, can be to the control switch 5 input different operating voltages of the output that is connected in this modulation circuit 3 and input, by the change of different voltages, can connect the filter effect that reaches different frequency point by these joint 6 places; When this filter circuit 2 is applied to low-pass filtering, the characteristics of signals that it measured, (RF Network Analyzer) inspects by the radio frequency network analyzer, can consult shown in Fig. 3 low-pass filter signal performance diagram of the present utility model, represent the X axis of frequency range in this, Meas1 is 5MHz in Mkr1,-0.014db, Mkr2 is 862MHz, and-1.481db makes that its low frequency signal curve below 862MHz is very smooth, representative has quite good curve characteristic, it can have more stable signal allocation and noiseproof feature when transmitting signal, and is 5MHz in Meas2 at Mkr1,-44.500db, Mkr2 is 862MHz, and on behalf of the utility model ,-22.356db have splendid return loss (Return Loss) characteristic when low-pass filtering.

In addition, in the operating voltage of control switch 5 for input one setting, select one modulation circuit 3 to connect, in the time will being applied to the 1000MHz bandpass filtering, seeing also Fig. 4 the utility model practices in shown in the 1000MHz bandpass filtered signal performance diagram, represent the X axis of frequency range in this, Meas1 is 1000MHz in Mkr3,-3.343db, initial quite steep in the A place by section (Rejection), representative has splendid Signal Spacing degree, makes that its band signal curve characteristic at 1000MHz is quite good, and it is when transmitting signal, more stable signal allocation and noiseproof feature can be arranged, and be 1000MHz in Meas2 at Mkr3, on behalf of the utility model ,-12.823db also have splendid return loss (ReturnLoss) characteristic.

Again, in the time will being applied to the bandpass filtering of another Frequency point, this control switch 5 is the operating voltage of another setting of input, select another modulation circuit 3 to connect, when being applied to the 1150MHz bandpass filtering, seeing also Fig. 5 the utility model is applied to shown in the 1150MHz bandpass filtered signal performance diagram, represent the X axis of frequency range in this, Meas1 is 1150MHz in Mkr4,-3.439db, initial quite steep by section (Rejection) in the B place, representative has splendid Signal Spacing degree, make its band signal representative have quite good curve characteristic at 1150MHz, it can have more stable signal allocation and noiseproof feature when transmitting signal, and is 1150MHz in Meas2 at Mkr4, on behalf of the utility model ,-17.030db also have splendid return loss (Return Loss) characteristic.

By the above, the composition of the utility model structure and use implementation are as can be known, the utility model and existing structure are in comparison, the utility model is owing to lie in each modulation circuit output and input is connected with control switch all respectively, this control switch can utilize the different voltage of input, carried out synchronous switching, change by different operating voltage, can connect the filter effect that reaches different frequency point by this joint, make itself and traditional modular filter in comparison, having volume can significantly dwindle, cost reduces, the selectivity height, characteristics such as economic benefit is good, and can more increase practical convenience its whole execution in the use.

More than a kind of band of modulating provided by the utility model is colluded to duplexer filter and is described in detail; the above only is a specific embodiment of the utility model; and be not used in and limit protection range of the present utility model; for one of ordinary skill in the art; according to the utility model embodiment; all can change to some extent in specific embodiments and applications, but all should be included within the protection range of the present utility model.

Claims

One kind can modulate the band collude to duplexer filter, it lies in input adapter and is parallel with filter circuit and array modulation circuit, described filter circuit is made up of inductance and electric capacity, and the output in filter circuit is connected with out splice going splice, it is characterized in that, the output of each modulation circuit and input are connected with control switch all respectively, and control switch can utilize the different voltage of input to be carried out synchronous switching, and the output in modulation circuit is connected with joint again.
2. the band of modulating as claimed in claim 1 is colluded to duplexer filter, it is characterized in that described filter circuit is a low-pass filter circuit.
3. the band of modulating as claimed in claim 1 is colluded to duplexer filter, it is characterized in that described filter circuit is a high-pass filtering circuit.
4. the band of modulating as claimed in claim 1 is colluded to duplexer filter, it is characterized in that, described modulation circuit is the bandwidth-limited circuit that low-pass filter circuit collocation high-pass filtering circuit is formed.
5. the band of modulating as claimed in claim 1 is colluded to duplexer filter, it is characterized in that, described modulation circuit is formed by the resonant cavity circuit, and described resonant cavity circuit lies in inductance and the electric capacity that is connected with the array parallel connection between the two corresponding electric capacity that output and input connect.