JPH03201602A - Structure for fixing dielectric resonator - Google Patents

Abstract

PURPOSE:To directly fit a dielectric resonator to a microwave circuit board and to reduce cost by arranging the dielectric resonator in a certain direction so that a plane part can not be faced to the surface of the microwave circuit board but an axial line through the mutually faced plane part can cross a microstrip line. CONSTITUTION:Since a dielectric resonator 1 is arranged in the direction so that the mutually faced plane part can not be faced to one surface of a microwave circuit board 2 but the axial line through the mutually faced plane part can cross a microstrip line 3, a magnetic flux in contact with a ground conductor is not conventionally increased even when the dielectric resonator 1 is made close to the microwave circuit board 2. Thus, a resonance circuit can be formed without lowering a Q value so much and the dielectric resonator 1 can be directly fitted to the microwave circuit board 2 without using a supporting stand. Then, the cost can be reduced concerning manufacture and further, processes can be simplified.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a microelectronic dielectric resonator that resonates in the δ mode, which has planar portions that face each other and an outer peripheral portion that connects the planar portions. The present invention relates to a fixing structure for a dielectric resonator that is attached to a microwave circuit board so as to be magnetically coupled to a strip line.

(Prior Art) Conventionally, this type of TEO dielectric resonator that resonates in the δ mode has been attached to a microwave circuit board with a configuration as shown in FIG.

In this figure, the dielectric resonator 11 is made of a dielectric material, and has an outer circumference f'J l 1 that connects opposing plane parts 11a and 1Ib and those plane parts 11a and 1lb.
It is formed in a cylindrical shape with c. The direction of the axis passing through the opposing plane portions 11a and 1lb is the direction of propagation of the microwave. The support stand 12 is made of an insulating material, and is fixed to one plane part 11b of the dielectric resonator II with an adhesive or the like, and is attached to the upper surface of the microwave circuit board 13 with an adhesive or the like. It is fixed in place.

The dielectric resonator +1 is attached so that its flat portions 11a and Ilb face the surface of the microwave circuit board 13.

The microwave circuit board 13 is made of a dielectric material, and has a microstrip line 14 formed on its upper surface and a ground conductor 15 formed on its lower surface. The dielectric resonator 11 is a microstrip line 14
is installed near the

In the dielectric resonator fixing structure as described above, the opposing planar portions 11a of the dielectric resonator 11.

A magnetic field is formed in the axial direction passing through 11b, and the magnetic flux F forming the magnetic field interlinks with the microstrip line 14, as shown in FIG.

In this way, the dielectric resonator 11 is magnetically coupled to the microstrip line 14 to form a resonant circuit. Therefore, by adjusting the distance M(l) between the dielectric resonator 11 and the microstrip line 14, the degree of coupling of rain sound is adjusted, and as a result, the characteristics of the resonant circuit are adjusted.

(Problems to be Solved by the Invention) As described above, in the conventional dielectric resonator fixing structure, the dielectric resonator 11 is floated to a predetermined height using the support t2. If the planar parts 11a, llb of the body resonator 11 are too close to the ground conductor 15 of the microwave circuit board 13, the proportion of magnetic flux in contact with the ground conductor 15 will increase, and loss due to eddy current will increase.
This is because the Q value of the resonant circuit decreases.

Therefore, since the support stand 12 is essential,
There are problems in that the number of components increases, leading to an increase in manufacturing costs, and it also becomes necessary to work to secure the support base 12 to the dielectric resonator 11, complicating the manufacturing process.

Therefore, in the present invention, when attaching a dielectric resonator to a microwave circuit board, manufacturing costs can be reduced by eliminating the need for a conventional support stand, and the manufacturing process can be simplified. The purpose is to do so.

(Means for Solving the Problems) In order to achieve such an object, the dielectric resonator fixing structure of the present invention includes a dielectric resonator, a microwave circuit board, and a microstrip line, The dielectric resonator resonates in the T E o +δ mode and includes opposing plane parts and an outer periphery connecting these plane parts, and the microwave circuit board is made of a dielectric material. , and a microstrip line is formed on one side and a ground conductor is formed on the other side, and the microstrip line is magnetically coupled to a dielectric resonator, and the dielectric resonator is formed on opposing planes. The surface of the dielectric resonator is not opposed to the one surface of the microwave circuit board, and the axis passing through both surfaces is arranged in a direction that intersects the microstrip line. It is characterized in that it is directly attached to the one surface of the circuit board.

(Function) In the dielectric resonator, the opposing plane parts do not face one side of the microwave circuit board, and the axis passing through the opposing plane parts is in a direction that intersects the microstrip line. Even if the dielectric resonator is brought close to the microwave circuit board, the magnetic flux in contact with the ground conductor does not increase as in the conventional case. Therefore, a resonant circuit can be formed without significantly lowering the Q value, and the dielectric resonator can be directly attached to the microwave circuit board without using a conventional support.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 3.

In these figures, the dielectric resonator l is T E o +
It resonates in the δ mode and is formed into a cylindrical shape with opposing planar portions 1a and 1b and an outer peripheral portion 1c connecting these planar portions 1a and lb. In this dielectric resonator l, one plane part 1a faces toward the microstrip line 3 on the microwave circuit board 2, and the outer peripheral part IC is located near the microstrip line 3 on the microwave circuit board 2. It is fixed with a suitable adhesive. The microwave circuit board 2 has the same configuration as the conventional one, and has a ground conductor 4 formed on its lower surface.

In the dielectric resonator fixing structure of the present invention having such a configuration, a magnetic field is formed in the axial direction passing through the planar portions la and 1b of the dielectric resonator l. The magnetic flux F forming this magnetic field interlinks with the microstrip line 3 as shown in FIG.

In this case, the flat parts 1a and lb are the microwave circuit board 2
Since the dielectric resonator 1 does not face the surface, even if the dielectric resonator 1 is close to the microwave circuit board 2, the Q value of the resonant circuit does not decrease much.

In this way, the dielectric resonator 1 is magnetically coupled to the microstrip line 3 to form a resonant circuit. Therefore, by adjusting the distance Q between the dielectric resonator 1 and the microstrip line 3 in the same manner as in the prior art, the degree of coupling between the two is adjusted, and as a result, the characteristics of the resonant circuit are adjusted.

Note that the dielectric resonator l may be arranged obliquely at an angle θ with respect to the microstrip line 3, as shown in FIG. In short, the plane parts 1a and lb of the dielectric resonator 1 do not face the surface of the microwave circuit board 2, and the direction in which the axis passing through the opposing plane parts 1a and 1b intersects the microstrip line 3. By arranging the dielectric resonator l between the two, magnetic coupling between the two can be maintained. When the dielectric resonator l is arranged obliquely in this way, the characteristics of the resonant circuit can also be adjusted by adjusting the angle θ.

Further, the dielectric resonator l does not necessarily have to have a cylindrical outer shape as in the above embodiment, but may have a prismatic shape, a cylindrical shape, or other shapes. Furthermore, the dielectric resonator l may be arranged so as to overlap the microstrip line 3.

(Effects of the Invention) As is clear from the above explanation, according to the present invention,
Since the dielectric resonator's flat part does not face the surface of the microwave circuit board and the dielectric resonator is arranged in a direction in which the axis passing through the opposing flat parts intersects the microstrip line, the dielectric resonator It is now possible to directly attach the resonator to the microwave circuit board, eliminating the need for a conventional support stand, reducing manufacturing costs and simplifying the work process.

[Brief explanation of drawings]

1 to 3 relate to an embodiment of the present invention, in which FIG. 1 is a perspective view of a main part of a microwave circuit board showing a fixing structure of a dielectric resonator of the same embodiment, and FIG. 2 is a side view thereof. , FIG. 3 is a plan view of a main part of a microwave circuit board showing a fixing structure for a dielectric resonator according to another embodiment of the present invention. 4 and 5 relate to a conventional example. FIG. 4 is a perspective view of a main part of a microwave circuit board showing a fixing structure of a dielectric resonator, and FIG. 5 is a side view thereof. 1... Dielectric material (oscillator, 2... Microwave circuit board, 3... Microstrip line, 4... Earth conductor. Dai Murata Manufacturing Co., Ltd.

Claims (1)

[Claims] (1) Dielectric resonator (1), microwave circuit board (2)
, and a microstrip line (3), the dielectric resonator (1) resonates in the TE_0_1δ mode, and has opposing plane parts (1a, 1b),
and an outer peripheral portion (
1c), the microwave circuit board (2) is made of a dielectric material, and has a microstrip line (3) formed on one side and a ground conductor (4) on the other side. Line (3) is dielectric resonator (1)
The dielectric resonator (1) has opposing planar parts (1a, 1b
) does not face the one surface of the microwave circuit board (2),
In addition, the axis passing through both the plane parts (1a, 1b) is arranged in a direction that intersects the microstrip line (3), and the dielectric resonator (1) is arranged in a direction that allows the microwave circuit board (2) to intersect with the microstrip line (3). ), wherein the dielectric resonator fixing structure is directly attached to the one surface of the dielectric resonator.