JP2643608B2 - High frequency filter adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting a high frequency filter, and more particularly to an apparatus for adjusting a high frequency filter using a dielectric resonator used as a band pass filter in a microwave band.

[0002]

2. Description of the Related Art As a conventional technique, for example, "Application of microwave dielectric band ceramics (National T
technical Report Vol.30, No
1 Feb. As shown in "1984", there is a method of adjusting a filter characteristic by moving a metal piece such as a screw close to or away from a dielectric resonator while observing a waveform of a measuring instrument.

The conventional high-frequency filter adjustment includes a measuring unit that supplies a high-frequency signal to the high-frequency filter and receives an output high-frequency signal output from the high-frequency filter, and a driver that rotates a screw on the filter to adjust the filter characteristics. Consists of

Next, a conventional high-frequency filter adjustment will be described with reference to the drawings.

FIG. 5 is a block diagram of a conventional high-frequency filter adjusting device.

The high-frequency filter adjustment shown in FIG. 5 is provided on the high-frequency filter 2 with the measuring unit 4 supplying an input high-frequency signal 71 to the high-frequency filter 2 and receiving an output high-frequency signal 72 output from the high-frequency filter 2. And a driver 6 for rotating a screw for adjusting the filter characteristic.

Here, the high frequency filter adjustment is performed by the operator 8
Is performed by selecting one of a plurality of screws provided on the high-frequency filter 2 according to the adjustment knowledge based on the measurement data observed by the measurement unit 4 and rotating the screw using the driver 6.

FIG. 2 is a perspective view showing an example of the high-frequency filter 2 to be adjusted, and FIG. 3 is an exploded perspective view showing the inside of the high-frequency filter 2.

As shown in FIGS. 2 and 3, the high-frequency filter 2 includes dielectric resonators 26 to 3 that resonate at a specific frequency.
0 and frequency screws 21 to 21 for adjusting the filter characteristics.
25 and coupling screws 2a to 2f.

The frequency screws 21 to 25 are connected to the resonators 26 to 3
By approaching 0, each resonance frequency is raised,
In addition, it can be lowered by moving away. By inserting the coupling screws 2a to 2f between the resonators 26 to 30,
The degree of resonance interference between the resonators can be increased. In the actual adjustment, the characteristics of the entire filter, that is, the bandwidth of the frequency and the reflection loss as the band-pass filter are specified while maintaining the harmony of the frequency and the coupling degree by the frequency screws 21 to 25 and the coupling screws 2a to 2f. Do the work of putting in the value.

FIG. 4 is a diagram showing an example of the reflection loss waveform of the high frequency filter observed by the measuring section 4 in the adjustment stage.

FIG. 4A is a diagram showing an initial waveform when all the screws have been cut out, and FIGS.
FIG. 4D is a diagram showing an example of a waveform observed in an intermediate stage of the adjustment. FIG. 4E is a diagram when the filter characteristic satisfies the standard values (bandwidth b and reflection loss p), ie, the end of the adjustment. It is a figure showing a waveform at the time.

In an intermediate stage of the adjustment, FIG.
As shown in (c) and (d), paying attention to the comprehensive line formed by the upper ends of the five resonance peaks, if the comprehensive line is convex as shown in (b), the coupling screw 2c or 2d is inserted. And (c)
If the covering line is flat as shown in the above, the coupling screw 2a or 2f is inserted to reduce the reflection loss. (D)
When the comprehensive battle is at the upper right, the frequency screw 21 or 25 is inserted to flatten the comprehensive line. The adjustment is performed in this way from the state where the comprehensive line is flat and the connecting screw 2a or 2f.
To reduce the level by inserting a certain amount of, and repeat the flattening of the comprehensive line that changed to a shape that is not flat at the same time as the level is lowered by any frequency screw or coupling screw. Obtainable.

[0014]

As described above, in the conventional high-frequency filter adjustment, a human operator recognizes and judges the measurement data of the measurement unit, and determines a large number based on the shape of the comprehensive line of the resonance peak. Since the adjustment screw is used to determine which screw to rotate, the time required for adjustment greatly depends on the skill level of the worker, and adjustments may be made only by experienced workers. There is a drawback that a large number of man-hours are required for worker training because they cannot be performed.

An object of the present invention is to provide a measuring section for inputting a high-frequency signal to a high-frequency filter and measuring a high-frequency signal output from the high-frequency filter, a measurement data processing section for recognizing a measurement result from the measurement section, and a measurement data processing section. The above-mentioned drawbacks are solved by providing a knowledge processing unit for performing inference based on the data recognition result and adjustment knowledge by the unit, a mechanism control unit for rotating a predetermined driver according to an instruction of the knowledge processing unit, and a motor unit. Adjustments can be performed automatically without the need for operators, and the time required for adjustments does not depend on the skill of the operator.
Another object of the present invention is to provide a high-frequency filter adjustment device that can significantly reduce the number of steps for training workers.

[0016]

According to the high frequency filter adjusting apparatus of the present invention, a metal piece such as a screw is rotated around a dielectric resonator.
Adjust the filter characteristics by moving closer or further away
A high-frequency filter adjustment device, which inputs a high-frequency signal to the high-frequency filter and outputs a high-frequency signal output from the high-frequency filter as measurement data , and recognizes a shape of the measurement data of the measurement unit to obtain a data recognition result. Occur
A measurement data processing unit that, adjusting knowledge for adjustment of the metal strip
And the data from the measurement data processing unit
Reasoning is performed based on the recognition result and the knowledge base.
Processing unit for generating an indication, a mechanism control unit for receiving a mechanism control instruction output from the knowledge processing unit, a motor unit for receiving a motor drive signal output from the mechanism control unit, and rotating a metal piece by the motor unit. A driver unit.

[0017]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a high-frequency filter adjusting apparatus according to one embodiment of the present invention, FIG. 2 is a perspective view showing an example of a high-frequency filter 2 to be adjusted, and FIG.
FIG. 4 is a diagram showing an example of a reflection loss waveform of the high-frequency filter observed by the measuring unit 4 in the adjustment stage.

In FIG. 1, a high-frequency filter adjusting apparatus according to the present embodiment includes a measuring unit 4 for inputting an input high-frequency signal 71 to a high-frequency filter 2 and measuring an output high-frequency signal 72 output from the high-frequency filter 2, and a measuring unit. 4, a measurement data processing unit 35 receiving the measurement data 73, a knowledge processing unit 32 receiving the data recognition result 74 from the measurement data processing unit 35, and a mechanism control unit receiving the mechanism control instruction 75 output from the knowledge processing unit 32. 31 and the mechanism control unit 3
A motor unit 5 receiving a motor drive signal 76 output from the motor unit 1 and a driver unit 6 rotated by the motor unit 5
It is composed of

The knowledge processing section 32 is constituted by an expert system including a knowledge base 34 having adjustment knowledge and an inference section 33 for performing inference based on the knowledge base 34.

In the knowledge base 34, for example, the above-mentioned adjustment knowledge is described in the form of rules as follows.

Rule 1: if comprehensive line = convex then The comprehensive line is flattened by inserting 2c shown in FIG.

Next, the operation of the high-frequency filter adjusting apparatus according to the present embodiment will be described.

Here, an example of the high frequency filter 2 is as shown in FIGS. 2 and 3 as described in the description of the prior art.

First, the high frequency filter 2 is
The input high-frequency signal 71 is input to the measuring unit 4 and the output high-frequency signal 72 output from the high-frequency filter 2 is received by the measuring unit 4. The measurement unit 4 transmits the received output high-frequency signal 72 to the measurement data processing unit 35 as measurement data 73. The measurement data processing unit 35 extracts a comprehensive line of the measurement data 73, recognizes the shape of the
“Inclusive line = convex”) is transmitted to the knowledge processing unit 32. The knowledge processing unit 32 makes an inference based on the received data recognition result 74 and the knowledge base 34, obtains the next operation as a conclusion (for example, inserts “2c”), and sends this to the mechanism control unit 31 as a mechanism control instruction 75. introduce.

In accordance with the received mechanism control instruction 75, the mechanism control section 31 supplies a motor drive signal 76 for rotating the specified screw to the motor section 5 to drive the driver section 6.

In the above cycle, the filter characteristics are shown in FIG.
By repeating the procedure up to (e), the adjustment can be performed automatically.

[0028]

As described above, according to the present invention, a measurement section for inputting a high-frequency signal to a high-frequency filter and measuring a high-frequency signal output from the high-frequency filter, and measurement data for recognizing a measurement result from the measurement section. By providing a processing unit, a knowledge processing unit for performing inference based on data recognition results and adjustment knowledge by the measurement data processing unit, and a mechanism control unit and a motor unit for rotating a predetermined driver in accordance with instructions of the knowledge processing unit, The adjustment can be performed automatically without the need for a worker, so that the time required for the adjustment does not depend on the skill of the worker, and the number of steps for training the worker can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of a high-frequency filter adjustment device according to one embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a high-frequency filter 2 to be adjusted.

FIG. 3 is an exploded perspective view showing the inside of the high-frequency filter 2 of FIG. 2;

FIG. 4 is a diagram illustrating an example of a reflection loss waveform of a high-frequency filter observed by a measurement unit 4 in an adjustment stage. FIG. 4A is a diagram showing an initial waveform when all the screws have been cut out. FIGS. 4B to 4D are diagrams illustrating an example of a waveform observed at an intermediate stage of adjustment. FIG. 4E is a diagram showing a waveform when the filter characteristic satisfies standard values (bandwidth b and reflection loss p), that is, at the end of adjustment.

FIG. 5 is a block diagram of a conventional high-frequency filter adjustment device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High frequency filter adjustment apparatus 2 High frequency filter 3 Control part 4 Measurement part 5 Motor part 6 Driver part 8 Worker 21-25 Frequency screw 26-30 Dielectric resonator 2a-2f Coupling screw 31 Mechanism control part 32 Knowledge processing part 33 Inference Section 34 knowledge base 35 measurement data processing section 71 input high frequency signal 72 output high frequency signal 73 measurement data 74 data recognition result 75 mechanism control instruction 76 motor drive signal

Claims (1)

(57) [Claims] 1. A metal piece such as a screw is rotated on a dielectric resonator.
The filter characteristics by moving it closer or farther away.
A high-frequency filter adjusting device for adjusting a high- frequency signal input to the high-frequency filter and outputting the high-frequency signal output from the high-frequency filter as measurement data ; and recognizing a shape of the measurement data of the measurement unit. Shide
A measurement data processing unit for generating over data recognition result, the metal
A knowledge base having adjustment knowledge for adjusting pieces, a data recognition result from the measurement data processing unit and the knowledge base.
A knowledge processing unit that performs a reasoning based on a tool and generates a mechanism control instruction, a mechanism control unit that receives a mechanism control instruction output from the knowledge processing unit, and a motor that receives a motor drive signal output from the mechanism control unit A high-frequency filter adjusting device, comprising: a driver unit configured to rotate the metal piece by the motor unit.