JPH04323902A - Resonance frequency adjustment method for dielectric resonator - Google Patents

Abstract

PURPOSE:To revise an elevating angle of a raised upright piece even after a resonator is made complete, to make the measurement highly efficient and to make the product stable and uniform by varying the resonance frequency in response to the elevating angle of the raised upright piece of a notch provided to a dielectric block. CONSTITUTION:A metal-inserted laminated plate 14 provided with a channel shaped notch 15 having a raised part in the vertical direction is provided to the dielectric resonator in the lengthwise direction of a dielectric block 20. A metal-inserted laminated plate 17 provided with a projection 18 is provided in press contact with the dielectric blocks 20 arranged side by side at other side walls of the outer circumference each having a throughhole 12 in the center and a conductor layer 13 on the circumferential wall and the outer circumferential wall. After assembling the blocks as the resonator and the channel shaped notch 15 of the metal-inserted laminated plate 14 on the outer surface is raised at an optional elevating angle theta, and the raised upright piece 16 is raised and while the measuring device is used to observe the center value of a resonance frequency, the piece 16 is set. Thus, the metal- inserted laminated plates 14, 18 form finally components as the assembly frame and the electrode of the resonator, and after the end of adjustment of the resonance frequency, they are used as they are without being removed from the dielectric block 20.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously and accurately adjusting the resonant frequency of a filter using a dielectric resonator in an ultra-high frequency mobile communication device such as a cellular car telephone system using a simple structure.

0002

[Prior Art] Recently, filters using dielectric resonators in communication equipment used in ultra-high frequency bands, such as cellular car phones and mobile phones, have been significantly miniaturized. Due to the reduction in its overall dimensions,
When adjusting the resonant frequency, for example, in the manufacturing stage of the filter, a conductive layer formed on the outer periphery, center through hole, and open end surface of the dielectric block constituting the dielectric resonator, especially on one of the outer peripheral wall surface and the open end surface, is used. Work is being carried out to remove the conductive layer that is present.

On the other hand, as shown in FIG.
A conductive layer 3 is formed on the outer periphery of and the inner periphery of the central through hole 4,
A plurality of these unit blocks were closely arranged side by side to form a resonator 10, and these unit blocks were placed on the mutually opposing outer peripheral surfaces of the dielectric blocks connected in parallel so as to be closely sandwiched between metal covers 5-1 and 6-1. Rear, the metal cover 5-1 on the top side
A method has been implemented in which a portion of the conductive layer formed on the outer periphery of the dielectric block is removed by applying a laser beam through a trimming opening 5-2 formed in the dielectric block.

0004

[Problems with the Prior Art] By the way, the adjustment of the resonant frequency of the dielectric resonator itself, which has been adopted in the past, is done during the manufacturing process of the resonator or at the stage of semi-finished products. Since this method involved removing layers, the amount of peeling varied, and if too much was removed, repair became troublesome, and from the viewpoint of frequency adjustment and device configuration, it was inefficient due to unstable factors.

[0005]

[Means for Solving the Problems] In order to eliminate the above-mentioned conventional obstacles, an upright piece is provided on the metal clamping plate constituting the electrode of the dielectric resonator, and by varying the upright angle, the constituent members of the device can be adjusted. This method involves adjusting the center frequency of the resonator and incorporating it into the process as an assembled component, thereby making it possible to continuously and efficiently adjust the frequency of a high-performance high-frequency electronic device.

[0006]

EMBODIMENTS The frequency adjustment method of the present invention will be explained in detail below with reference to FIGS. 1 and 2. First, FIG. 1 is an exploded perspective view of a dielectric resonator for carrying out the present invention, and FIG. (B) has a through hole 1 in the center.
2, a conductive layer 13 is applied to this peripheral wall and an outer peripheral wall, and a protruding piece 18 that comes into contact with the dielectric block with other side walls of the outer periphery connected in parallel is shown. There is.

Each component (A), (B) of the above-mentioned resonance device
, (C) are integrated into one body as shown in the perspective view of FIG. The center value of the resonant frequency is set while visually checking it using a device (not shown).

[0008] Here, the metal sandwich plates 14 and 18 will ultimately form constituent members as the assembly frame and electrodes of the device.
After the resonant frequency has been adjusted, it can be used as is without being removed from the dielectric block.

[0009]

Thus, according to the present invention, the resonant frequency is not adjusted by scraping off the conductive layer that adheres to the dielectric block during the manufacturing of the resonator, but instead the resonant frequency is adjusted by scraping off the conductive layer that adheres to the dielectric block during the manufacturing of the resonator. The resonance frequency can be continuously and stably adjusted by simply adjusting the elevation angle of the upright piece provided on one side, so the elevation angle of the upright piece can be changed even after the resonator is completed, making manufacturing and measurement processes highly efficient. can be converted into

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a dielectric resonator for carrying out the method of the present invention, in which (A) shows a metal sandwich plate, (B) shows a dielectric block, and (C) shows another metal sandwich plate.

FIG. 2 shows the completed assembled product of FIG. 1, with a plurality of upright pieces standing up at arbitrary elevation angles to adjust the resonance frequency.

FIG. 3 is a completed perspective view of a conventional dielectric resonator.

[Explanation of symbols]

11 Dielectric fabric 12
Through hole 13 Conductive layers 14, 17 Metal sandwiching plate 16 Standing piece 20 Dielectric block θ
elevation angle

Claims (1)

[Claims] 1. A method for adjusting the resonant frequency of a resonator formed by connecting in parallel a plurality of cylindrical dielectric blocks each having a through hole in the center and having a conductor layer formed on the outer peripheral wall surface and the peripheral wall of the through hole. At least the vicinity of the open end surface of at least one of the outer peripheral wall surfaces exposed to the outside is exposed as a dielectric fabric, and then metal sandwiching plates that can be fitted to both surfaces of the dielectric blocks are provided over the entire area of the connected dielectric blocks. At the same time, a U-shaped cut having an origin perpendicular to the length direction of the dielectric block is provided in one of the metal sandwiching plates corresponding to the dielectric fabric, and the origin of the cut is made to stand up. 1. A method for adjusting the resonant frequency of a dielectric resonator, characterized in that the center frequency of resonance can be continuously varied according to the elevation angle of the dielectric resonator.