CN201204583Y - Electrically tunable filter device with frequency calibration function - Google Patents

Abstract

The utility model discloses an electrically tunable filter device with frequency calibration function, which relates to processing unit for setting and calibrating automatically frequency of an electrically tunable filter in the communication field. The filter is composed of a coupler, an electrically tunable filter, a frequency synthesizer, a monitoring module, an amplitude detection module, a drive module, and a power-supply module. The utility model has the function of setting frequency of the electrically tunable filter, and can implement auto-calibration after frequency drifting of the filter due to various reasons. The filter device has the advantage of high integration degree, simple circuit, easy operation, stable and reliable performance, and the like. The utility model is especially suitable for a device for tuning and automatically calibrating frequency of an electrically tunable filter.

Description

Electrically regulated filtering apparatus with frequency calibration function

Technical field

The utility model relates to a kind of electrically regulated filtering apparatus with frequency calibration function in the communications field.It is the tuner that is specially adapted to do electrically tunable filter frequency tuning and automatic calibration.

Background technology

Electrically tunable filter has obtained extensive use in the communications field, must accurately if deviation appears in frequency configuration, can reduce the performance of communication system even cause systemic breakdown its frequency configuration.The method that adopts is to come tuning by the step number of importing the motor rotation in advance at present, the method of this change frequency is stronger to the dependence of mechanical zero, because vibration or other reasons cause the drift of filter center frequency probably, need re-enter step number, otherwise equipment work will be undesired, even damage equipment, so can not guarantee electrically tunable filter the entirely true of frequency is set, manipulate inconvenience in addition.

Summary of the invention

The purpose of this utility model is to avoid the weak point in the above-mentioned background technology and provides a kind of electrically tunable filter to have the frequency configuration function, and can finish at electrically tunable filter because the electrically regulated filtering apparatus of calibrating automatically after the drift of a variety of causes frequency of occurrences with frequency calibration function.And the utility model also has advantages such as integrated degree height, circuit be simple, easy to use, stable and reliable for performance.Use the utility model can guarantee effectively that electrically tunable filter is provided with the entirely true of frequency, and can finish at electrically tunable filter owing to calibrate automatically after the drift of a variety of causes frequency of occurrences.

Order of the present utility model is achieved in that the utility model is made up of coupler 1, electrically tunable filter 2, coupler 3, frequency synthesizer 4, monitoring module 5, amplitude detection module 6, driver module 7, power module 8.Wherein the input port 1 of coupler 1 connects outside input signal device, and input port 3 goes out end with frequency synthesizer 4 and is connected for 1 mouthful, and output port 2 is connected with the input port 1 of electrically tunable filter 2; Electrically tunable filter 2 output ports 2 are connected with coupler 3 input ports 1, and inbound port 3 is connected with driver module 7 outbound ports 1; The output port 2 of coupler 3 connects outside output signal device, and output port 3 is connected with the inbound port 2 of amplitude detection module 6; Monitoring module 5 output ports 1 are connected with the input port 2 of frequency synthesizer 4, and input port 2 is connected with the outbound port 1 of amplitude detection module 6, and output port 3 is connected with driver module 7 inbound ports 2; End+V the voltage end that goes out of power module 8 is connected with each modular power source port respectively.

The utility model monitoring module 5 comprises frequency synthesizer control module 9, step number and direction control module 10, human-machine interface module 11, amplitude detection and comparison module 12, message processing module 13, wherein message processing module 13 is come in and gone out and is held 1 pin to connect frequency synthesizer control module 9 discrepancy ends 2 pin, message processing module 13 is come in and gone out, and end 2 pin connect amplitude detection and 2 pin are held in comparison module 12 discrepancy, the discrepancy of message processing module 13 holds 3 pin to connect step number and direction control module 10 discrepancy ends 1 pin, and message processing module 13 is come in and gone out and held 4 pin to connect human-machine interface module 11 discrepancy ends 1 pin; End 1 pin that goes out of frequency synthesizer control module 9 connects frequency synthesizer 4 inbound ports 2; 1 pin of going into to hold of amplitude detection and comparison module 12 is connected the outbound port 1 of amplitude detection module 6; 2 pin that go out to hold of step number and direction control module 10 are connected the inbound port 2 of driver module 7; Frequency synthesizer control module 9, step number and direction control module 10, human-machine interface module 11, amplitude detection and comparison module 12, message processing module 13 each input 7 pin go out with power module 8 that end+V voltage end links to each other, each input 8 pin is held with ground and is connected.

The utility model is compared background technology following advantage:

1. the utility model is owing to adopt frequency synthesizer 4, amplitude detection module 6, realize that electrically tunable filter is provided with the correctness of frequency, and can finish after electrically tunable filter is owing to the drift of a variety of causes frequency of occurrences and calibrate automatically, guaranteed to use the Performance And Reliability of the system of electrically tunable filter.

2. each parts of the utility model adopt extensive programmable integrated circuit to make, and have integrated degree height, also have advantages such as circuit is simple, volume is little, with low cost, stable and reliable for performance simultaneously, and are practical in engineering.

Description of drawings

Fig. 1 is the electric functional-block diagram of the utility model embodiment.

Fig. 2 is the electrical schematic diagram of the embodiment of the utility model monitoring module 5.

Embodiment

With reference to Fig. 1, Fig. 2, the utility model is made up of coupler 1, electrically tunable filter 2, coupler 3, frequency synthesizer 4, monitoring module 5, amplitude detection module 6, driver module 7, power module 8, Fig. 1 is the electric functional-block diagram of the utility model embodiment, and embodiment presses Fig. 1 connection line.4 effects of Fig. 1 medium frequency synthesizer are to produce the frequency tuning signal to be input to coupler 1, coupler 1 is sent to electrically tunable filter 2 to the frequency tuning signal, coupler 3 effects output to amplitude detection module 6 to the frequency tuning signal by electrically tunable filter 2,6 pairs of frequency tuning signals of amplitude detection module carry out detection, the signal controlling electrically tunable filter that driver module 7 provides according to monitoring direction and step number on request carried out tuningly, and power module 8 provides power supply for each module.Embodiment coupler 1, coupler 3 adopt homemade waveguide coupler to make, the A3977 type step motor drive module making that driver module 7 adopts ALLEGRO company to produce, and power module 8 adopts general integrated regulated power supply to make.

5 its effects of the utility model monitoring module are: the one, and whether control frequency synthesizer 4 output frequency harmonic ringing and output signal frequency, the 2nd, judge direction and the step number that electrically tunable filter rotates by the signal that detected amplitude detection module 6 is sent here, the 3rd, thus control and driving module 7 is rotated the direction and the step number of electrically tunable filter rotation on request.Monitoring module 5 is made up of frequency synthesizer control module 9, step number and direction control module 10, human-machine interface module 11, amplitude detection and comparison module 12, message processing module 13.Fig. 2 is the electrical schematic diagram of the embodiment of the utility model monitoring module 5, and embodiment presses Fig. 2 connection line.Fig. 2 medium frequency synthesizer control module 9 effect is the whether amplitude of output frequency harmonic ringing and output signal of control frequency synthesizer 4, step number and direction control module 10 provide electrically tunable filter 2 to rotate step number and direction, the direct current signal that 12 pairs of amplitude detection modules 6 of amplitude detection and comparison module are sent here detects and compares, signal after detection and the comparison is inputed to message processing module 13, the effect of human-machine interface module 11 is to accept operating personnel's instruction and show the information that needs, message processing module 13 is according to the instruction of human-machine interface module 11, the information of amplitude detection and comparison module 12, control frequency synthesizer control module 9, step number and direction control module 10, human-machine interface module 11 input signals such as grade are finished various Signal Processing, reach frequency tuning and automatic calibration function.

The concise and to the point operation principle of the utility model is as follows: the utility model has two kinds of mode of operations, and the one, operating state, the 2nd, be provided with or calibration electrically tunable filter 2 operating frequency states.In working order down, electrically tunable filter 2 frequencies have been provided with correctly, input signal is by coupler 1 input electrically tunable filter 2, through electrically tunable filter 2 filtering unwanted signals useful signal is exported by coupler 3, this moment frequency synthesizer 4 no-outputs, electrically tunable filter 2 keeps the frequency state work that has been provided with.Be provided with or calibrate under the electrically tunable filter 2 operating frequency states, monitoring module 5 is at first accepted to be provided with or calibration electrically tunable filter control command, control frequency synthesizer 4 produces the correspondent frequency harmonic ringing, this signal is by coupler 1, electrically tunable filter 2, coupler 3 becomes voltage signal after sending into amplitude detection module 6, monitoring module 5 detects the amplitude of this voltage, size according to voltage amplitude rotates electrically tunable filter 2 direction and step number on request by control and driving module 7, monitoring module 5 voltage signal of detected amplitude detection module 6 outputs ceaselessly when electrically tunable filter 2 rotates, satisfy step number and the directions that the frequency needs rotate be set by the electrically tunable filter 2 relatively found out voltage signal, thus the frequency configuration of electrically tunable filter on the frequency that requires.After frequency configuration or calibration were finished, monitoring unit 5 made the utility model work in the operating state pattern.

The utility model mounting structure is as follows: monitoring module among the utility model Fig. 1, Fig. 25 and power module 8 are installed in front panel, frequency synthesizer 4, amplitude detection module 6 are installed in the shielding box and are installed on the base plate with driver module 7, all circuit blocks are installed in, and long * wide * height is in 694mm * 562.5mm * 690mm rack, the assembly cost utility model.

Claims (2)

1. electrically regulated filtering apparatus with frequency calibration function, it comprises coupler (1), electrically tunable filter (2), coupler (3), frequency synthesizer (4), amplitude detection module (6), driver module (7), power module (8), it is characterized in that: also comprise monitoring module (5), wherein the input port 1 of coupler (1) connects outside input signal device, input port 3 goes out end with frequency synthesizer (4) and is connected for 1 mouthful, and output port 2 is connected with the input port 1 of electrically tunable filter (2); Electrically tunable filter (2) output port 2 is connected with coupler (3) input port 1, and inbound port 3 is connected with driver module (7) outbound port 1; The output port 2 of coupler (3) connects outside output signal device, and output port 3 is connected with the inbound port 2 of amplitude detection module (6); Monitoring module (5) output port 1 is connected with the input port 2 of frequency synthesizer (4), and input port 2 is connected with the outbound port 1 of amplitude detection module (6), and output port 3 is connected with driver module (7) inbound port 2; End+V the voltage end that goes out of power module (8) is connected with each modular power source port respectively.

2. the electrically regulated filtering apparatus with frequency calibration function according to claim 1, it is characterized in that: monitoring module (5) comprises frequency synthesizer control module (9), step number and direction control module (10), human-machine interface module (11), amplitude detection and comparison module (12), message processing module (13), wherein message processing module (13) is come in and gone out and is held 1 pin to connect frequency synthesizer control module (9) discrepancy end 2 pin, message processing module (13) is come in and gone out, and end 2 pin connect amplitude detection and 2 pin are held in comparison module (12) discrepancy, the discrepancy of message processing module (13) holds 3 pin to connect step number and direction control module (10) discrepancy end 1 pin, and message processing module (13) is come in and gone out and held 4 pin to connect human-machine interface module (11) discrepancy end 1 pin; End 1 pin that goes out of frequency synthesizer control module (9) connects frequency synthesizer (4) inbound port 2; 1 pin of going into to hold of amplitude detection and comparison module (12) is connected the outbound port 1 of amplitude detection module (6); 2 pin that go out to hold of step number and direction control module (10) are connected the inbound port 2 of driver module (7); Frequency synthesizer control module (9), step number and direction control module (10), human-machine interface module (11), amplitude detection and comparison module (12), each input 7 pin of message processing module (13) go out with power module (8) that end+V voltage end links to each other, each input 8 pin is held with ground and is connected.

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