JPS645485B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high-frequency oscillation circuit that is simple and economical when mass-producing oscillators with arbitrary oscillation frequencies.

Conventional configuration and its problems Generally, an oscillator consists of an active circuit section including an amplifier circuit and a resonator section that determines the oscillation frequency.
In the case of these double-sided copper-clad boards, etching
In the case of ceramic substrates, the circuit section and resonator section are constructed by printing or vapor deposition, or the circuit section is provided on the substrate and independent individual resonators are attached separately. It is being However, the former configuration has the disadvantage that after the circuit components are assembled on the board, if the oscillation frequency or noise characteristics deteriorate due to component variations or dimensional errors in the resonant line, the circuit components must be replaced. On the other hand, the latter method has the disadvantage that it takes time and is not easy to adjust the oscillation frequency etc. after connecting the resonator to the circuit section on the separately configured board and incorporating it into the housing. Ta.

Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and provides an economical high-frequency oscillation circuit that is easy to control the oscillation frequency, easy to replace circuit components, and suitable for mass production. be.

Structure of the Invention In order to achieve the above object, the present invention holds the circuit board on which the active circuit portion is formed inside, and connects the coaxial resonator from the outside of the casing in which a through groove is formed in a part. The center conductor of the coaxial resonator, which is inserted into the through groove and protrudes from the outer conductor, is soldered to the active circuit part of the circuit board at a position corresponding to the oscillation frequency, and fixed from the screw groove provided in the housing. The present invention provides a high frequency oscillation circuit in which the coaxial resonator is fixed inside the through groove by pressing the side surface of the outer body of the coaxial resonator into the through groove with a screw.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below. FIG. 1 is a sectional view of the main parts of the high frequency oscillation circuit.

In the figure, 1 is a substrate on which a circuit section is formed in advance, and 2 is a coaxial resonator, the detailed structure of which will be described later. This coaxial resonator 2 is inserted into a groove 4a provided in a housing 4 and fixed with fixing screws 5.

The feature of this embodiment is that the substrate 1 on which the active circuit section is configured in advance and the coaxial resonator 2 are configured separately.
The coaxial resonator 2 is inserted into a resonator-shaped groove 4a provided in the housing 4, and the center conductor 3 of the coaxial resonator 2 is inserted into the opening 6 provided in the substrate 1, and the desired oscillation frequency and Coaxial resonator 2 to match the characteristics
After adjusting the position of the coaxial resonator 2, tighten the fixing screw 5.
Finally, the substrate 1 and the center conductor 3 are fixed with solder 6. That is, the oscillation frequency of the coaxial resonator 2 is determined by the outer conductor 12 in FIG.
The desired oscillation frequency and its characteristics can be obtained by determining where on the protruding center conductor 13 it is soldered to the active circuit section of the board 1. I can do it.

With this configuration, the resonator can be freely replaced, the oscillation frequency and characteristics can be easily controlled, and devices with desired characteristics can be mass-produced.

FIG. 2 shows an example of a coaxial resonator 2 used in the high frequency oscillation circuit of the present invention. a is a side sectional view, b
is a cross-sectional view taken along line A-A' in figure a.

In the figure, 10 is a ground conductor, 11 is a dielectric material having a step on its outer peripheral surface, 12 is an outer conductor, and 13 is a center conductor.

In the figure, a conductor rod is used as the center conductor 13, but the same applies even if a conductor coating is provided on the inner peripheral surface of the dielectric 11 and this conductor coating is in contact with the center conductor 13. .

Further, in the present invention, the coaxial resonator may have any shape, and the dielectric 11 may be cylindrical with no steps, or may be a hollow type without the dielectric 11. Of course.

FIG. 3 shows another embodiment of the high frequency oscillation circuit of the present invention, and the same components in FIG. 3 as in FIG. 1 are given the same numbers. In the embodiment shown in FIG. 1, the coaxial resonator 2 is attached to the bottom surface of the casing 4, whereas in this embodiment, the coaxial resonator 2 is installed in a groove 4a provided on the side surface of the casing 4. It is installed. This also provides the same effect as that of the first embodiment, and in addition, the coaxial resonator 2 does not fall under its own weight, making adjustment work easy and suitable for fine adjustment.

Effects of the Invention As described above, the present invention includes holding a substrate that constitutes an active circuit section in a housing, inserting a coaxial resonator into a groove provided in the housing, and fixing the coaxial resonator with a fixing screw. The device is fixed to the housing by the fixing means used, and this has the advantage that it has a simple structure, makes it easy to replace parts and control the oscillation frequency, and is suitable for mass production.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
Figure a is a side cross-sectional view of a coaxial resonator used in the high-frequency oscillation circuit, Figure 2 b is a cross-sectional view taken along line A-A' in Figure a, and Figure 3 is a cross-sectional view showing another embodiment of the present invention. It is a diagram. 1... Board, 2... Coaxial resonator, 3... Center conductor, 4... Housing, 5... Fixing screw, 6... Solder.

Claims (1)

[Claims] 1. A circuit board on which an active circuit portion is formed, a casing that holds the circuit board inside and has a through groove formed in a part thereof, and an outer conductor that is inserted into the through groove from the outside of the casing. A coaxial resonator whose more protruding center conductor is soldered to the active circuit part of the circuit board at a position corresponding to the oscillation frequency, and a fixing screw from a screw groove provided in the housing, A high frequency oscillation circuit comprising: fixing means for pressing a side surface of an external body into the through groove to fix the coaxial resonator inside the through groove.