JPH03214904A - Trimming device for adjusting resonance frequency of dielectric resonator - Google Patents

Abstract

PURPOSE:To reduce a trimming time remarkably and to prevent a read error of a measuring device through automation by implementing the frequency adjustment trimming and measurement simultaneously so as to improve the resolution of luter control. CONSTITUTION:A seat block 13 integrated with a measuring terminal 12 is advanced and the measuring terminal 12 is set to a dielectric resonator 18 in a grounded form. After the end of set, the luter 9 is advanced up to this side of the dielectric resonator 18 and the resonance frequency is measured through the measuring terminal 16. Whether or not the trimming is enabled is judged depending on the difference between the measured value and the resonance frequency limit and the luter 9 and a grind stone 8 are used to trim the dielectric resonator 18.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention measures the resonant frequency of a dielectric resonator used in a dielectric filter, etc., and determines whether frequency trimming is unnecessary or whether frequency trimming is possible or not. The present invention relates to a trimming device for adjusting the resonant frequency of a dielectric resonator, which performs trimming if possible, measures the resonant frequency after trimming, and determines and selects good products and defective products.

Conventional technology Conventional trimming for adjusting the resonant frequency of a dielectric resonator is
This is done using a grindstone such as a conductive diamond.
While measuring the resonant frequency, it is necessary to keep the grinding wheel away from the dielectric resonator. Therefore, after measuring the resonant frequency, the power source of the dielectric resonator was cut with a grindstone, and the frequency was measured again after moving the grindstone away, which was a repeated manual process.

Problems to be Solved by the Invention In such conventional trimming for frequency adjustment, the trimming whetstone was formed of a conductive material, so when it came close to the dielectric resonator, the frequency detection part and the dielectric resonator could not be connected to each other. It is necessary to move the grinding wheel away each time the measurement is made to affect the binding capacity, which is inefficient.Also, because it was done by hand, the cutting amount adjustment varies depending on the skill level of the operator, and the reading error of the measuring instrument etc. Accurate trimming for frequency adjustment was not possible due to these factors. Additionally, the time required for trimming each piece varied greatly depending on the operator. The present invention solves the above-mentioned problems, and significantly shortens the trimming time by performing frequency adjustment trimming and measurement at the same time, prevents reading errors of measuring instruments through automation, and improves the resolution of router control. The present invention provides a trimming device for adjusting the resonant frequency of a dielectric resonator that allows adjustment.

Means for Solving the Problems In order to solve the above problems, the present invention uses a router using a non-conductive diamond grinding wheel, an X-table drive mechanism that can control the amount of movement according to the number of drive pulses, and a frequency measurement value. The structure includes an arithmetic processing section that controls the amount of cutting, a channel section that holds the dielectric resonator and measures the resonance frequency, a frequency measurement terminal, and a measuring device.

Effect In the above configuration, the chuck part has the function of holding the dielectric resonator during trimming and stabilizing the coupling state between the dielectric resonator and the frequency measurement terminal, and the frequency measurement terminal has the function of measuring the resonance frequency. It stabilizes the coupling state between the dielectric resonator and the measuring instrument, and the diamond grinding wheel is non-conductive, making it possible to measure the resonant frequency while cutting the dielectric resonator. The amount of cutting is controlled by the X-table drive mechanism, which is driven by the It has a function of giving control commands to the mechanism, and by organically combining the above functions, stable trimming for frequency adjustment becomes possible.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 4 is a schematic diagram showing the entire trimming device for adjusting the resonant frequency of a dielectric resonator according to the present invention. In FIG. 4, reference numeral 1 denotes a main body, and a chuck portion 2 is attached to the main body 1 to an index table 3 that rotates intermittently. This main body 1 has a dielectric resonator input part 4, from which a dielectric resonator l8 to be trimmed is supplied. Around this index table 3, a router 9 having a take-out part 6 for non-defective products, a take-out guide 7, and a grindstone 8 at its tip is installed. Apart from this zero body 1, a measuring instrument 1O and an arithmetic processing section 11 are installed. FIG. 1 shows a trimming section in an embodiment of a trimming device for adjusting the resonant frequency of a dielectric resonator according to the present invention. In Fig. 1, 9 is a router, 8 is a grindstone, and l2 is a dielectric resonator l8.
(GND side), l3 is a seating block that connects the measurement terminal l2 with the measurement terminal l2 of the dielectric resonator l8 and prevents the dielectric resonator 1B from retreating, l4 is the measurement terminal 1
6 (measuring instrument input/output side); 15 is a connector for fixing the measuring terminal l6 to the measuring terminal block l4; 16 is the measuring terminal for the human output of the measuring instrument 10; 2 is the dielectric a chuck portion that holds the body resonator 18;
18 is a dielectric resonator, and B is a position where dielectric resonator 18 is trimmed.

In FIG. 2, 19 is a pressure spring that brings the seating block 13 into pressure contact with the dielectric resonator 18, 20 is a support column for the measurement terminal (GND side) 12, and 2l is a pressure spring between the seating block 13 and the measurement terminal (
GND side) This is a movable bearing that maintains contact with 12. In FIGS. 3(a) and 3(b), 22 is a magazine for storing the dielectric resonator 18 before trimming, 23 is a holding channel for waiting before mounting the dielectric resonator 18 on the chuck part 2; 24 is a transfer pin for transferring the dielectric resonator 18 from the holding chuck 23 to the chuck section 2; 25 is a transfer bin for transferring the dielectric resonator 18 from the chunk section 2 to the holding chuck 26. Also, to show the roles of the four chasok parts 2 at each position, at position 8, the resonator l8
At position B, trimming is performed, at position C, defective products are taken out, and at position D, good products are taken out.

Next, the operation of the present invention will be explained. As shown in Fig. 4, the chuck part 2 is integrated with the index table 3, and is intermittently rotated by power (not shown).
) is indexed to trimming position B. After indexing, as shown in FIG. 2, the seating block 13 integrated with the measurement terminal 12 moves forward, and the measurement terminal 12 is set in the dielectric resonator 18 in a grounded manner. After completing the setting, the router 9 moves forward to the front of the dielectric resonator l8, and the fourth
The resonance frequency is measured using the measuring device 1O shown in the figure through the measurement terminal 16 shown in FIG. Depending on the difference between the measured value and the resonance frequency limit value, it is determined whether trimming is possible or not.

If trimming is not possible, the router 9 retreats to the standby position.

Next, the diamond grindstone 8 will be explained. In Fig. 5, 27 is a rotating shaft, 28 is a ceramic grindstone made by vitrifying ceramic particles, and 29 is a diamond grindstone made by vitrifying diamond particles, which is bonded to the tip of the ceramic grindstone 28 for cutting. In addition to increasing the force, the conductivity is lowered by moving it away from the rotating shaft 27, and the cutting surface 30 trims the dielectric resonator l8. Next, Figure 6 shows an electrical block diagram of this device. The resonant frequency of the dielectric resonator l8 is measured by the measuring device 10, and based on the measured value, the calculation processing unit l1 calculates whether or not trimming is possible and the amount of trimming, and the pulse motor control unit 3l and the pulse motor dryer 32, X
The trimming amount is commanded to the table drive mechanism 33, and the dielectric resonator 18 is trimmed using the router 9 and the grindstone 8. This method concerns the internal software of the arithmetic processing unit 1l, and its flowchart is shown in FIG. After performing peak search with the measuring device 10 and measuring the resonant frequency, if trimming is possible, measure the transmission level at the resonant point,
The end of trimming is determined when the transmission level at the trimming target frequency reaches the transmission level at the resonance point. Further, as shown in the flowchart of FIG. 8, cutting can be performed by moving the router forward by the number of pulses determined by calculation. An example of the calculation formula is shown below.

Pulse feed amount = target frequency - measured frequency / coefficient (target frequency - number of measured cycles) × number of trimmings The coefficient used is a value determined through experiments.
In addition, in order to prevent excessive cutting, we have devised a method to reduce the amount of pulses as the number of trimming increases.As shown in Figure 1, at trimming position B, we cut the corner to reduce the amount of cutting. Prevents overdoing.

Effects of the Invention As described above, according to the trimming device for adjusting the resonant frequency of a dielectric resonator of the present invention, the chuck part that holds the dielectric resonator, the measurement terminal and the measurement device that measure the frequency of this dielectric resonator are provided. By having a router with a grinding wheel for trimming, an X-table drive mechanism that can control the amount of movement according to the number of drive pulses, and an arithmetic processing unit, the grinding wheel can be moved away from the dielectric resonator every time a measurement is made, unlike conventional methods. There is no need for trimming, and trimming can be done in about half the time compared to manual trimming. Furthermore, since the measurement is performed automatically, there is no variation in the amount of cutting, there is no reading error, and the quality is stable and reliable trimming is possible. The effect will be huge.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a trimming section in an embodiment of a trimming device for adjusting the resonant frequency of a dielectric resonator of the present invention;
Figure 2 is a sectional view of the seating block at the same trimming section, Figure 3
Figures (a) and (b) are explanatory diagrams showing the method of transporting the dielectric resonator, Figure 4 is a schematic diagram of the entire device, Figure 5 is an explanatory diagram showing the structure of the grinding wheel of the device, and Figure 6 Figure 7 is a system block diagram of the same device. FIG. 8 is a flowchart showing a method for controlling the cutting amount of a resonator. 2...Chuck part, 8...Whetstone, 9.
...Reuter, l2...Measurement terminal, 13
... Seating block, l4 ... Measurement terminal block, l5 ... Connector, 16 ...
・Measurement terminal, I8...Dielectric resonator, B...
...Trimming position.

Claims (4)

[Claims] (1) A chuck part that holds the dielectric resonator, a measurement terminal that penetrates the center hole of the dielectric resonator and protrudes to the open end of the dielectric resonator, and a measurement terminal that is placed close to the protruding part of the measurement terminal for measurement. an input/output measurement terminal connected to the instrument, a router with a grindstone for trimming the electrode part of the dielectric resonator, an X-table drive mechanism that can control the amount of movement according to the number of drive pulses, and measurement of resonance frequency. A trimming device for adjusting the resonant frequency of a dielectric resonator, which is equipped with an arithmetic processing unit that calculates the amount of movement of the control router and performs drive control. (2) A dielectric resonator cutting wheel made of a non-conductive material that does not affect the measurement of the resonant frequency even if it comes into contact with the dielectric resonator, and can cut dielectric ceramics at high speed. A trimming device for adjusting the resonant frequency of a dielectric resonator according to claim 1. (3) Claim 1 further comprising an arithmetic processing unit that controls the cutting amount of the dielectric resonator by measuring the resonance transmission level of the dielectric resonator in advance and then monitoring the transmission level at a single target frequency. A trimming device for adjusting the resonant frequency of the dielectric resonator described above. (4) Based on the results of experimentally determining the relationship between the amount of cutting and the amount of change in frequency, first measure the resonance frequency, and calculate the amount of cutting of the dielectric resonator based on the difference from the target frequency. The trimming device for adjusting the resonant frequency of a dielectric resonator according to claim 1, further comprising an arithmetic processing section for controlling the amount.