JPH0611602Y2 - Circuit device having dielectric resonator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a circuit device having a dielectric resonator.

[Prior Art] As shown in FIG. 7, the inner conductor 6 is formed on the inner peripheral surface of the cylindrical dielectric 5b.
b, the outer conductor 7b is provided on the outer peripheral surface, and the outer conductor 7b is attached to the circuit board in order to attach the 1/4 wavelength distributed constant type coaxial dielectric resonator formed by connecting the outer conductor 7b to the end surface conductor. The soldering to the wiring conductor (earth land) is disclosed in, for example, Japanese Utility Model Laid-Open No. Sho 60-9301 and Japanese Patent Laid-Open No. 60-260.
No. 203 is disclosed.

[Problems to be Solved by the Invention] By the way, if both the inner conductor 6b and the outer conductor 7b of the coaxial dielectric resonator are connected to the circuit board, the circuit board inevitably becomes large. Become. Also, the outer conductor 7b
It has been difficult to connect the to the ground wiring conductor of the circuit board with high reliability.

Therefore, an object of the present invention is to provide a circuit device which can easily and reliably achieve the connection of the dielectric resonators and can be downsized.

[Means for Solving the Problems] The present invention for achieving the above object will be described with reference to the reference numerals of the drawings showing an embodiment. A circuit board 1 and an electric circuit provided on the circuit board 1 will be described. And a dielectric resonator 2 connected to the electric circuit, and a metal case 3 for accommodating the circuit board 1, the electric circuit and the dielectric resonator 2. Having a groove 9 and having a substantially U-shaped cross section (including one having an inner peripheral surface and an outer peripheral surface having a curvature), and the groove 9
The inner conductor 6 provided on the wall surface of the dielectric body 5 and the outer conductor 7 provided on the outer peripheral surface of the dielectric body 5, and the edge of the circuit board 1 is inserted into the groove 9 so that the inner conductor 6 is It is electrically and mechanically coupled to the wiring conductor 4 of the circuit board 1 by the solder 16, and the outer conductor 7 of the dielectric resonator 2 is electrically and mechanically coupled to the metal case by the solder 17. And a circuit device having a dielectric resonator.

[Operation and Effect of Invention] The present invention has the following operation and effect.

(A) The circuit board 1 is placed in the groove 9 of the dielectric 5 having a substantially U-shaped cross section.
Since the inner conductor 6 is electrically and mechanically coupled to the wiring conductor 4 of the circuit board 11 with the solder 16, the inner conductor 6 is electrically connected and the dielectric resonator is fixed to the circuit board 1. Can be achieved easily and reliably.

(B) Since the edge of the circuit board 1 is inserted into the groove 9 of the dielectric 5, the size reduction of the circuit device is achieved.

[Embodiment] Next, a circuit device having a dielectric resonator according to an embodiment of the present invention will be described with reference to FIGS. This circuit device includes a voltage controlled oscillator (VCO)
A circuit board 1 provided with an O circuit, a dielectric resonator 2,
The metal case 3 is provided. VC on the circuit board 1
An O circuit (not shown) and an inner conductor connecting wiring conductor 4 of the dielectric resonator 2 are provided.

As shown in FIG. 3, the dielectric resonator 2 has a U-shaped cross-section dielectric 5 made of a dielectric porcelain, an inner conductor 6 (inner circumferential electrode) provided on the inner circumferential surface, and an outer circumferential surface on the outer circumferential surface. The outer conductor (outer peripheral electrode) is provided, and the end face conductor 8 that connects the inner conductor 6 and the outer conductor 7 at the end face. The inner conductor 6, the outer conductor 7, and the end surface conductor 8 are formed by applying Ag conductor paste and firing it. The inner conductor 6 is provided on the wall surface of the trough-shaped groove 9 of the dielectric body 5, the outer conductor 7 is provided on the remaining three side surfaces except the one side surface 10 having the groove 9, and the end surface conductor 8
Is provided only on one end surface 14 of the dielectric 5. Therefore, the inner conductor 6 and the outer conductor 7 are separated via the dielectric 5 except the end face 14 and face each other, and the other end face 15 of the dielectric 5 is separated.
Is open. Dielectric resonator 2 configured in this way
Operates on the same principle as that of the coaxial dielectric resonator constituted by the cylindrical dielectric 5b as shown in FIG.

The edge of the circuit board 1 is inserted into the groove 9 of the dielectric resonator 2, and the inner conductor 6 is electrically and mechanically coupled to the wiring conductor 4 by the solder 16.

The metal case 3 is formed to accommodate the circuit board 1 and the dielectric resonator 2 and has an inner height substantially equal to the outer diameter of the dielectric resonator 2.

As is apparent from FIG. 1, the dielectric resonator 2 is arranged at a position surrounded by the upper surface 3a, the lower surface 3b, and the side surface 3c of the metal case 3, and the outer conductor 7 is soldered to the upper surface 3a and the lower surface of the metal case 3. 3b is electrically and mechanically coupled to the side surface 3c.

This embodiment has the following advantages:

(1) Since the dielectric resonator 2 is arranged between the end surface of the circuit board 1 and the side surface 3c of the metal case 3, and the circuit board 1 is further inserted into the groove 9, the dielectric resonator 2 of the circuit board 1 is It is not necessary to provide a mounting portion, and the circuit board 1 can be downsized.

(2) Since the outer conductor 7 of the dielectric resonator 2 is directly connected to the metal case 3 by the solder 17, the dielectric resonator 2 can be mechanically and electrically coupled with high reliability.

(3) Since the dielectric 5 is formed in a U shape, the circuit board 1 is inserted into the groove 9, and the inner conductor 6 is connected to the wiring conductor 4 with the solder 16, the inner conductor 6 can be easily connected. Can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a circuit device according to an embodiment of the present invention, FIG. 2 is a plan view showing a part of the circuit device of FIG. 1, and FIG. It is a perspective view of a dielectric resonator. 1 ... Circuit board, 2 ... Dielectric resonator, 3 ... Metal case, 4 ... Wiring conductor, 5 ... Dielectric material, 6 ... Inner conductor, 7
…… Outer conductor, 16, 17 …… Solder.

Claims (1)

[Scope of utility model registration request] 1. A circuit board (1), an electric circuit provided on the circuit board (1), a dielectric resonator (2) connected to the electric circuit, the circuit board (1), and In a circuit device comprising an electric circuit and a metal case (3) accommodating the dielectric resonator 2, the dielectric resonator (2) has a groove (9) and is formed into a substantially U-shaped cross section. A dielectric (5), an inner conductor (6) provided on a wall surface of the groove (9), and an outer conductor (7) provided on an outer peripheral surface of the dielectric (5), The edge of the circuit board 1 is inserted into the groove (9), and the inner conductor (6) is electrically and mechanically coupled to the wiring conductor (4) of the circuit board (1) by solder (16), The outer conductor (7) of the dielectric resonator (2) is electrically and mechanically coupled to the metal case (3) with solder (17). Circuit device having a dielectric resonator according to claim Rukoto.