JPS63190405A - Packing method for coaxial type dielectric resonator - Google Patents

Abstract

PURPOSE:To simplify the packing work by fitting a dielectric resonator to a notch provided corresponding to the circuit pattern of a circuit board till the step provided to its outside and soldering them directly. CONSTITUTION:The coaxial type dielectric resonator 5 provided with the step to its outside is fitted to the notch 2 provided to the circuit board 1 up to the step 6 and the circuit pattern 3 in press contact onto the circuit board 1, the outer shape of the coaxial dielectric resonator 3 and an inner conductor 7 are soldered directly. Thus, the fixation and connection of the coaxial dielectric resonator 5 onto the circuit board 1 are executed accurately without using a jumper, the simplicity of word is attained, the dispersion in the circuit characteristic is eliminated and the stability is improved.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a microwave integrated circuit such as a wireless communication device,
This is a mounting method in which a dielectric resonator is fitted into a notch made in accordance with the circuit pattern of the circuit board, up to the stepped part provided on its outer shape, and it can be placed in a consistent and accurate position without using connection wires, etc. It can be connected and fixed, simplifying the mounting work, improving the variation and stability of electrical characteristics, and contributing to high connection (δ conversion) and miniaturization.

[Industrial application field]

The present invention relates to a microwave integrated circuit such as a wireless communication device,
In particular, the present invention relates to a method for mounting a coaxial dielectric resonator in which the dielectric resonator is accurately and uniformly mounted on a circuit board to improve circuit characteristics.

BACKGROUND ART Coaxial dielectric resonators are often used in oscillation circuits, filters, and the like of ultra-high frequency band wireless communication devices.

This coaxial dielectric resonator is much smaller than a cavity resonator, and is mounted directly on a circuit board and connected to the circuit, but it is easy and reliable to mount and has stable characteristics. required.

[Conventional technology]

FIG. 3(a) is a perspective view of an example of a conventional coaxial dielectric resonator, and FIG. 3(a) is a perspective view of its implementation.

The coaxial dielectric resonator 51 is, for example, a rectangular parallelepiped made of a ceramic material, etc., and has a through hole 71 coaxially provided along the central axis in the longitudinal direction, and the entire outer surface and inner surface of the hole except for one end surface of the through hole 71 are tUt. The outer surface is made of gold, and the ground side terminal is used as the ground side terminal, and the inner conductor 7 is formed on the inner surface of the end of the unplated end surface side through hole 71.

In the ultra-high frequency band circuit configuration, a circuit board 1 having a circuit pattern 3 made of a conductor on a ceramic board is closely fixed to the surface of a metal ground board 11, and a microstrip line or slit line is formed. and further mounted components 4 on top of the circuit pattern 3 on the surface to configure the circuit.
A microwave integrated circuit is used, and this coaxial dielectric resonator 5■ is also mounted on the circuit board 1, and its outer surface is fixed by soldering to the circuit pattern 3 on the ground side or by gluing it with a conductive adhesive. and connect the inner conductor 7 and the circuit pattern 3 with the connecting wire 31
Alternatively, they are connected by soldering conductor metal fittings.

[Problem that the invention seeks to solve]

However, (1) the connection wire 31 is used to connect the inner conductor 7 and the circuit board 1;
etc., its length and form are difficult.

(2) Furthermore, the fixed position shift of the coaxial dielectric resonator on the circuit board 1 is added 50 times.

(3) The above-mentioned variations in the connection between the inner conductor 7 and the circuit board 1 affect variations in electrical characteristics and stability.

(4) Furthermore, the reliability of the connection via the connection line 31 etc. is impaired accordingly.

There are other problems.

In order to solve the above-mentioned problems, the present invention proposes a new method for mounting a coaxial dielectric resonator, which improves the precision of the fixing position of the coaxial dielectric resonator and connects the inner conductor without using connection wires. It is something to do.

Measures for Solving Problem c] As shown in Fig. 1, in a method for mounting a dielectric resonator in a microwave integrated circuit, a step is formed in the notch 2 provided in the circuit board 1. 6 is fitted into the coaxial dielectric resonator 5 up to the stepped portion 6, and the abutting circuit pattern 3 on the circuit board l is directly soldered to the outer shape and inner conductor 7 of the coaxial dielectric resonator 5. This problem is solved by the coaxial dielectric resonator mounting method of the present invention, which is characterized by the following.

[For production]

In other words, the coaxial dielectric resonator is precisely placed at a predetermined position on the circuit board and is directly connected to the circuit pattern in contact with the external shape by soldering without using connection wires, so the purpose can be achieved. .

The circuit board 1 is provided with a notch 2 (or a notch) into which the coaxial dielectric resonator 5 is fitted, in alignment with the circuit pattern 3.

As shown in the figure, the outer shape of the coaxial dielectric resonator 5 is provided with stepped portions 6 having L-shaped cuts at both side corner portions.

If this coaxial dielectric resonator 5 is fitted into the notch 2 provided in the circuit board 1 up to the step 6, the circuit pattern 3 on the circuit board 1 that is in contact with the periphery of the outer shape and the circuit pattern 3 on the circuit board 1 can be directly soldered. can be connected to each other.

As described above, the coaxial dielectric resonator 5 can be fixed and connected to the circuit board l accurately without any variation without using connection wires, etc., which simplifies the work and eliminates variations in circuit characteristics, making it stable. You can improve your sexual performance.

Furthermore, the height and mounting dimensions of the coaxial dielectric resonator 5 on the circuit board 1 are reduced (the height of the microwave integrated circuit can be reduced).

〔Example〕

The present invention will be specifically described below with reference to embodiments shown in the drawings.

Like numbers refer to like objects throughout the design.

FIG. 1(a) is a perspective view of a coaxial dielectric resonator according to an embodiment of the present invention. 1 is a perspective view of a coaxial dielectric resonator according to another embodiment of the present invention, and bl is a sectional view of the same mounting.

The coaxial dielectric resonator 5 of one embodiment is a rectangular parallelepiped made of a ceramic material or the like, with a through hole 71 having a diameter of 2 times coaxially provided along the central axis in the longitudinal direction, and the longitudinal corners are cut into an L shape. The entire outer surface of the through hole 71 and the inner surface of the hole are plated with silver except for one end surface of the through hole 71, and the outer surface is the ground terminal, and the inner surface of the end of the through hole 71 on the unplated end surface is the inner conductor 7. becomes.

At this time, the level of the stepped portion 6 and the level of the inner conductor 7 are set to be the same.

A circuit board 1 made of a ceramic plate constituting a microwave integrated circuit is provided with a square hole of a notch 2 into which the coaxial dielectric resonator 5 is fitted in accordance with a circuit pattern 3.

When the coaxial dielectric resonator 5 is fitted into the notch 2, the step 6 contacts the top surface of the circuit board l, and the notch 2
The surrounding circuit pattern 3 is also brought into contact.

Therefore, the external portion of the coaxial dielectric resonator 5 and the predetermined circuit pattern 3 are connected by soldering to effect fixation and circuit connection.

At this time, the circuit pattern 3 connected to the inner conductor 7 is at the same level and comes into contact with the inner conductor 7, so that the connection can be made only by soldering.

Furthermore, when the coaxial dielectric resonator 5 is mounted on the circuit board l, when the ground board 11 under the circuit board 1 hits,
Dig into approximately the same shape.

As another example, as shown in FIG. 2, the step portion provided on the coaxial dielectric resonator 8 is provided as a U-shaped groove 9 on both sides, and the notch portion 2 provided on the circuit board 1 is opened on one side. The groove 9 is fitted into the notch 2 of the circuit board 1 from the opening side and is slid into the notch 2 of the circuit board 1.

In the above embodiment, the outer shape of the coaxial dielectric resonator was a rectangular parallelepiped, but it could also have a circular shape or a topographic shape.
It is possible to fit it into a notch on a circuit board and fix and connect it by soldering to the circuit pattern.

Further, although the level of the stepped portion and the level of the inner conductor 7 are made the same, there is no problem even if there is a difference in level.

〔Effect of the invention〕

As described above, according to the present invention, connection and fixing can be performed at accurate positions without variation with respect to the circuit pattern without using connection wires, etc., simplifying the mounting work, and eliminating variation in electrical characteristics and making it stable. This has a significant effect in that it also improves the performance and contributes to higher reliability and miniaturization of the connection.

[Brief explanation of the drawing]

FIG. 1 shows one embodiment of the present invention, FIG. 2 shows another embodiment of the present invention, and FIG. 3 shows a conventional example. In the figure, 1 is a circuit board, 2 is a notch, 3 is a circuit pattern, 4 is a component, 5.8.51 is a coaxial dielectric resonator, 6 is a step, 7 is an inner conductor, 9 is a groove, 11 is a grounding board, 31 is a connecting wire,
71 is a through hole.

Claims (1)

[Claims] In a method for mounting a dielectric resonator in a microwave integrated circuit, there is provided a coaxial dielectric resonator in which a notch (2) provided in a circuit board (1) is provided with a stepped portion (6) in its outer shape. A body resonator (5) is fitted up to the stepped portion (6), and the abutting circuit pattern (3) on the circuit board (1);
Outer shape and inner conductor (7) of the coaxial dielectric resonator (5)
A method for mounting a coaxial dielectric resonator, which is characterized by directly soldering a coaxial dielectric resonator.