JPH098515A - Dielectric resonator - Google Patents

Abstract

PURPOSE: To realize the excellent resonance characteristics with a low loss by decreasing a difference from the sensitivity of frequency adjustment so as to ensure a range of the frequency adjustment widely. CONSTITUTION: A cylindrical dielectric resonator 1 is arranged in a metal-made shield case 2. A metal-made frequency adjustment plate 6 is arranged to an upper part of the shield case 2 in opposition to the dielectric resonator 1. The frequency adjustment plate 6 is close to or apart from the dielectric resonator 1 by turning a frequency adjustment knob 5 provided to the outside of the upper face of the shield case 2. The frequency adjustment plate 6 is formed to be a disk having a larger diameter than an outer diameter of the dielectric resonator 1. A metal-made frequency adjustment cylinder 7 is fitted to the periphery of the frequency adjustment plate 6 protrudingly downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric resonator used in a base station combiner for mobile communication.

[0002]

2. Description of the Related Art In recent years, with the development of the field of mobile communication, the demand for high-performance filters used in communication base stations has increased. As a high-performance filter, recently, a dielectric resonance device has been widely used for miniaturization.

An example of a conventional dielectric resonance device will be described below.
This will be described with reference to the drawings. FIG. 16 is a sectional view showing an example of a conventional dielectric resonator device. As shown in FIG. 16, on the lower surface of the metal shield case 29,
The dielectric resonator 28 is arranged via a dielectric resonator support 30. The dielectric resonator 28, the dielectric resonator support 30 and the shield case 29 are coaxially provided with a through hole, and the dielectric resonator 28 is made of polytetrafluoroethylene inserted into the through hole. Fixing bolt 31a
And is fixed to the lower surface of the shield case 29 using nuts 31b. Further, a loop-shaped input / output electrode as the input / output terminal 34 is arranged on the lower surface of the shield case 29 so that the present dielectric resonator can be operated as a bandpass filter. Further, the dielectric resonator 28 is provided on the shield case 29.
The frequency adjusting plate 33 is disposed so as to face the frequency adjusting plate 33, and the frequency adjusting plate 33 is adjusted by rotating the frequency adjusting knob 32 provided on the outer surface of the shield case 29. Here, the frequency adjusting knob 32 is formed with a screw thread that is screwed into a screw groove formed on the upper surface of the shield case 29.

The operation of the conventional dielectric resonance device having the above-mentioned structure will be described below. The dielectric resonator 28 resonates at a specific frequency determined by the relative permittivity and shape of the resonator and the resonance mode used.

The resonance frequency is adjusted by controlling either the magnetic field energy or the electric field energy of the electromagnetic field generated near the dielectric resonator. Generally, a movable metal plate is used to change the magnetic field energy, and a movable dielectric is used to change the electric field energy.

To adjust the resonance frequency of the conventional dielectric resonator, the frequency adjusting knob 32 is rotated to bring the frequency adjusting plate 33 close to the dielectric resonator 28, or the frequency adjusting plate 33 is moved to the dielectric resonator 28. It was performed by changing the magnetic field energy by moving away from it. The resonance frequency increases when the frequency adjusting plate 33 approaches the dielectric resonator 28, and the frequency adjusting plate 33 causes the dielectric resonator 2 to move.
It gets lower when moving away from 8.

[0007]

However, the conventional structure as described above has the following problems. That is, when the gap between the frequency adjusting plate 33 and the dielectric resonator 28 is large, the magnetic field energy distribution in the vicinity of the frequency adjusting plate 33 is in a sparse state, so that the frequency change with respect to the displacement of the frequency adjusting plate 33. Is less sensitive. On the other hand, conversely, when the gap between the frequency adjusting plate 33 and the dielectric resonator 28 is small, the magnetic field energy distribution in the vicinity of the frequency adjusting plate 33 is in a dense state. Higher sensitivity to frequency changes. As described above, the conventional configuration as described above has a problem that the sensitivity of frequency adjustment is not constant.

In order to solve the above problems in the prior art, the present invention reduces the difference in sensitivity of frequency adjustment, and
An object of the present invention is to provide a dielectric resonance device which can secure a wide range of frequency adjustment and which has excellent resonance characteristics with low loss.

[0009]

In order to achieve the above object, the first structure of the dielectric resonator device according to the present invention is a shield case, a dielectric resonator arranged in the shield case, and A dielectric resonator device including a frequency adjusting device arranged inside the shield case so as to face the dielectric resonator, and means for displacing the position of the frequency adjusting device provided so as to project outside the shield case. The frequency adjusting device comprises a frequency adjusting plate and a frequency adjusting cylinder provided on the frequency adjusting plate so as to project toward the dielectric resonator.

In the first structure of the present invention, it is preferable that the frequency adjusting plate and the frequency adjusting cylinder are made of metal. Further, in the first configuration of the present invention,
It is preferable that the dielectric resonator is formed in a cylindrical shape, and the frequency adjusting cylinder has a diameter larger than the diameter of the dielectric resonator.

Further, in the first configuration of the present invention, it is preferable that at least three frequency adjusting tubes are connected. Further, in this case, it is preferable that the diameter of each frequency adjusting cylinder becomes larger as it approaches the dielectric resonator.

Further, in the first structure of the present invention, it is preferable that the diameter of the frequency adjusting cylinder is different between the frequency adjusting plate side and the dielectric resonator side. Further, in this case, it is preferable that the diameter of the frequency adjusting cylinder on the side of the dielectric resonator is larger than the diameter of the dielectric resonator.

In the first structure of the present invention, it is preferable that the frequency adjusting plate has holes.
Further, in this case, it is preferable that at least three holes are opened. In this case, it is further preferable that the number of fan-shaped holes is an even number of 4 or more.

In the first structure of the present invention, it is preferable that the frequency adjusting plate is made of mesh metal. Further, in the first configuration of the present invention, it is preferable that a portion of the frequency adjusting plate excluding the peripheral edge is made of a dielectric.

A second aspect of the dielectric resonant device according to the present invention.
The configuration of a shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged in the shield case so as to face the dielectric resonator, and outside the shield case. A dielectric resonance device having means for displacing the position of the frequency adjusting device provided in a projecting manner, wherein the frequency adjusting device is a bowl-shaped or hollow conical shape without a bottom surface. It is characterized by consisting of.

In the second structure of the present invention, it is preferable that the frequency adjusting plate is made of metal. Also,
In the second configuration of the present invention, the dielectric resonator is formed in a cylindrical shape, and the bowl-shaped frequency adjusting plate or the cavity-shaped conical frequency adjusting plate having no bottom surface is larger than the diameter of the dielectric resonator. It preferably has a large diameter.

A third aspect of the dielectric resonant device according to the present invention.
The configuration of a shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged in the shield case so as to face the dielectric resonator, and outside the shield case. A dielectric resonance device comprising means for displacing the position of the frequency adjusting device provided in a projecting manner, wherein the frequency adjusting device is composed of a plurality of metal plates arranged at predetermined intervals. And

In the third structure of the present invention, it is preferable that the area of each metal plate becomes smaller as it approaches the dielectric resonator. Further, in the third structure of the present invention, it is preferable that the dielectric is filled between the metal plates.

In the third structure of the present invention, it is preferable that a spring is interposed between the metal plates.
A fourth configuration of the dielectric resonator device according to the present invention is a shield case, a dielectric resonator arranged in the shield case, and a dielectric resonator opposed to the dielectric resonator in the shield case. A frequency adjusting device and a means for displacing the position of the frequency adjusting device provided so as to project outside the shield case, wherein the frequency adjusting device is a convex frequency adjusting device. Characterized by being composed of a body.

In the fourth structure of the present invention, it is preferable that the frequency adjuster is made of metal. Also,
In the fourth configuration of the present invention, it is preferable that the frequency adjusting device has a multistage structure including a plurality of frequency adjusting bodies.

Further, in the first, second, third or fourth configuration of the present invention, the means for displacing the position of the frequency adjusting device adjusts the position of the frequency adjusting device by rotating operation. It is preferably a knob.

Further, in the first, second, third or fourth structure of the present invention, it is preferable that the dielectric resonator is fixed to the shield case via the dielectric substrate.

[0023]

According to the first aspect of the present invention, the shield case, the dielectric resonator arranged in the shield case, and the frequency arranged in the shield case so as to face the dielectric resonator. A dielectric resonance device comprising an adjusting device and means for displacing the position of the frequency adjusting device provided so as to project outside the shield case, wherein the frequency adjusting device comprises a frequency adjusting plate and the frequency. Since the adjusting plate comprises the frequency adjusting tube provided so as to project toward the dielectric resonator, the following operation can be achieved. That is, if the means for displacing the position of the frequency adjusting device is operated to displace the frequency adjusting cylinder together with the frequency adjusting plate in the coaxial direction, the inner wall of the frequency adjusting device moves parallel to the distribution curve of the magnetic field energy. Therefore, since the magnetic field energy pushed inward by the frequency adjusting device constantly changes, the change of the magnetic field energy distributed around the dielectric resonator is controlled to be constant. That is, the sensitivity of frequency adjustment is linearly controlled with respect to the operation amount of the means for displacing the position of the frequency adjusting device.

In the first structure of the present invention,
According to the preferable example in which at least three frequency adjusting tubes are connected, the linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is further improved. Further, in this case, according to a preferable example in which the diameter of each frequency adjusting cylinder increases as it approaches the dielectric resonator, the range of frequency adjustment is widened.

In the first structure of the present invention,
According to the preferable example in which the diameter of the frequency adjusting cylinder is different between the frequency adjusting plate side and the dielectric resonator side, the linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is further improved. . Further, in this case, according to a preferable example in which the diameter of the frequency adjusting cylinder on the side of the dielectric resonator is larger than the diameter of the dielectric resonator, the range of frequency adjustment is widened.

In the first structure of the present invention,
According to the preferable example in which the hole is opened in the frequency adjusting plate, when the frequency adjusting plate approaches the dielectric resonator, a part of the magnetic field energy passes through the hole formed in the frequency adjusting plate. Therefore, the excitation in the TM mode can be suppressed. As a result, the linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is maintained over a wide range. Further, in this case, according to the preferable example in which at least three holes are opened, the metal portion of the frequency adjusting plate is increased, so that the deterioration of the strength of the frequency adjusting plate due to the opening of the fan-shaped holes is prevented. It In this case, further, it is preferable that the frequency adjusting plate is formed in a disk shape, and that the frequency adjusting plate is provided with an even number of four or more fan-shaped holes that require a portion to which the frequency adjusting knob is connected. According to the example, the TM in the portion for connecting the means for displacing the position of the frequency adjusting device with respect to the input / output terminal and the metal portion for attaching the frequency adjusting tube
Excitation by mode is equalized.

Further, in the first configuration of the present invention,
According to the preferable example in which the frequency adjusting plate is made of a mesh-shaped metal, it is not necessary to open a hole in the frequency adjusting plate, so that the deterioration of the strength of the frequency adjusting plate is prevented.

In the first configuration of the present invention,
According to the preferable example in which the portion of the frequency adjusting plate excluding the peripheral edge is made of a dielectric material, the TM mode excitation is eliminated, and the linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is improved. .

According to the second configuration of the present invention,
A shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged in the shield case so as to face the dielectric resonator, and provided outside the shield case. A dielectric resonance device having means for displacing the position of the frequency adjusting device, wherein the frequency adjusting device comprises a frequency adjusting plate formed in a bowl-like or hollow conical shape without a bottom surface. Since it is characterized, the following effects can be achieved. That is, since the shape of the inner wall of the frequency adjusting device comes closer to the distribution curve of the magnetic field energy, the linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is improved.

In the second structure of the present invention,
According to a preferred example in which the dielectric resonator is formed in a columnar shape, the bowl-shaped frequency adjusting plate or the conical frequency adjusting plate without a bottom in the cavity has a diameter larger than the diameter of the dielectric resonator, Wider range of frequency adjustment.

According to the third aspect of the present invention,
A shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged in the shield case so as to face the dielectric resonator, and provided outside the shield case. A dielectric resonance device having means for displacing the position of the frequency adjusting device, wherein the frequency adjusting device is composed of a plurality of metal plates arranged at a predetermined interval,
The following effects can be achieved. That is, when the means for displacing the position of the frequency adjusting device is operated to bring the frequency adjusting device closer to the dielectric resonator, the metal plate near the dielectric resonator controls the magnetic field energy and the resonance frequency becomes higher. The resonance frequency adjustment sensitivity increases. When the means for displacing the position of the frequency adjusting device is further operated, the control of the magnetic field energy by the metal plate close to the means for displacing the position of the frequency adjusting device becomes more dominant, and the adjustment sensitivity once increased becomes smaller. Therefore, the sensitivity of frequency adjustment is averaged over a wide range. In particular, if the number of metal plates is three or more, the number of times that the adjustment sensitivity that has once increased becomes smaller increases, so the linearity of the change in the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device improves. .

Further, in the third configuration of the present invention,
According to the preferable example in which the area of each metal plate becomes smaller as it approaches the dielectric resonator, the linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is further improved.

In the third structure of the present invention,
According to the preferable example in which the dielectric is filled between the metal plates, the strength of the frequency adjusting plate and the frequency adjusting knob is increased, and stability is improved with respect to the operation of the means for displacing the position of the frequency adjusting device. .

In the third structure of the present invention,
According to the preferable example in which the spring is interposed between the metal plates, the position of the frequency adjusting device is displaced even after the metal plate comes into contact with the dielectric resonator by operating the means for displacing the position of the frequency adjusting device. Since it becomes possible to operate the means for making the frequency adjustment range wide.

According to the fourth aspect of the present invention,
A shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged in the shield case so as to face the dielectric resonator, and provided outside the shield case. And a means for displacing the position of the frequency adjusting device, which is characterized in that the frequency adjusting device comprises a convex frequency adjusting body, so that the following action is achieved. be able to. That is, when the frequency adjusting device is moved closer to the dielectric resonator by operating the means for displacing the position of the frequency adjusting device, the frequency adjusting body controls the magnetic field energy and the resonance frequency becomes higher. The adjustment sensitivity of becomes larger. When the means for displacing the position of the frequency adjusting device is further operated, the part that controls the control of the magnetic field energy shifts from the bottom surface side to the side surface side of the frequency adjustment body. Therefore, the density of the controlled magnetic field energy does not increase any more, and the sensitivity of frequency adjustment is kept constant.

In the fourth structure of the present invention,
According to a preferred example in which the frequency adjusting device has a multi-stage structure composed of a plurality of frequency adjusting bodies, the frequency adjusting device is a part that controls the magnetic field energy as the frequency adjusting body near the dielectric resonator approaches the dielectric resonator. The frequency adjustment body located on the side of the means for displacing the position is moved to the frequency adjustment body, and the sensitivity of the frequency adjustment once increased becomes small. As a result, the linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is improved. In particular, if the number of frequency adjusting bodies is three or more, the frequency adjustment sensitivity, which has been increased once, will be decreased more frequently. The linearity of change is improved.

Further, in the first, second, third or fourth structure of the present invention, the means for displacing the position of the frequency adjusting device is for adjusting the frequency for displacing the position of the frequency adjusting device by a rotating operation. According to the preferable example of the knob, the sensitivity of the frequency adjustment is linearly controlled with respect to the rotation speed of the frequency adjustment knob.

Further, in the first, second, third or fourth structure of the present invention, according to a preferable example, the dielectric resonator is fixed to the shield case via the dielectric substrate. Since the heat generated in the dielectric resonator is easily radiated through the dielectric substrate, the temperature characteristic of the dielectric resonator is improved.

[0039]

EXAMPLES The present invention will be described in more detail below with reference to examples. <First Embodiment> FIG. 1 is a sectional view showing a first embodiment of the dielectric resonator device according to the present invention. As shown in FIG.
On the lower surface of the metallic shield case 2, a dielectric resonator 1 is arranged in the center thereof via a dielectric resonator support base 3 made of alumina. Through holes are coaxially provided in the lower surfaces of the dielectric resonator 1, the dielectric resonator support base 3, and the shield case 2, and the dielectric resonator 1 and the dielectric resonator support base 3 are provided in the through holes. It is fixed to the lower surface of the shield case 2 by using the inserted fixing bolts 4a and nuts 4b. Here, the dielectric resonator 1 is formed in a cylindrical shape. Further, the fixing bolt 4a is formed of polytetrafluoroethylene as a material, has excellent heat resistance, has a small loss in a high frequency electromagnetic field, and has a large strength. Further, on the lower surface of the shield case 2, two loop-shaped electrodes as the input / output terminals 8 are provided. On the other hand, a frequency adjusting plate 6 is arranged above the shield case 2 so as to face the dielectric resonator 1. The frequency adjustment plate 6 is formed by rotating the metal frequency adjustment knob 5 provided on the outer side of the upper surface of the shield case 2,
Close to the dielectric resonator 1 or the dielectric resonator 1
Be kept away from. Here, the frequency adjusting plate 6 is formed in a disk shape having a diameter larger than the outer diameter of the dielectric resonator 1. In addition, a through hole is provided in the center of the upper surface of the shield case 2, and a screw groove that is screwed into the thread of the frequency adjusting knob 5 is formed in this through hole.

As shown in FIGS. 1 and 5 (a), a metallic frequency adjusting cylinder 7 is attached to the periphery of the frequency adjusting plate 6 so as to project downward. Various methods can be considered for attaching the frequency adjusting plate 6 and the frequency adjusting cylinder 7. For example, it may be attached by using screws or solder, and the frequency adjusting knob 5, the frequency adjusting plate 6, and the frequency adjusting cylinder 7 may be integrally formed.

The operation of the dielectric resonance device configured as described above will be described below. According to the perturbation theory, W _m , W
_{When e} is the time average value of the magnetic field energy, the time average value of the electric field energy, and W _t is the total reactive energy in the resonance system, the change in the resonance frequency in the dielectric resonator of the present embodiment is as follows (Equation 1) ) Is written.

[0042]

[Equation 1]

The above (Equation 1) shows that when δW _m > δW _e ,
That is, when the dominant region of the magnetic field energy W _m is pushed inward, the resonance frequency increases, and when δW _m <δW _e , that is, when the dominant region of the electric field energy W _e is pushed inward. It shows that the resonance frequency becomes low.

Further, the electromagnetic field component in the dielectric resonance device of the present embodiment has four regions (a), (b),
When divided into (c) and (d), they are expressed as a linear combination of trigonometric functions by the eigenfunction expansion method for the TE ₀₁ δ mode, which is the fundamental wave of a cylindrical dielectric resonator, as shown in the following (Equation 2). become.

[0045]

[Equation 2]

Where β _1p = X _p / L, β _2p = Y _p /
M, β _3q = qπ / h, A ₁ , A ₂ , B, C and D are arbitrary real numbers, β ₁ , β ₂ and β _3q are phase constants in the z direction for each region, and k ₁ and k _3q are each region With respect to (in the regions (a), (b), and (d), the radial wavelength constants are assumed to be equal), J ₀ (x) is a Bessel function of the first kind, H ₀ ⁽²⁾ (X) is the Hankel function of the second kind.

From the above formula, the TE ₀₁ δ mode electromagnetic field distribution is as shown in FIG. As shown in FIG. 3, in the region other than the dielectric resonator 1 in the shield case 2, the electric field energy W _e hardly propagates and the magnetic field energy W _m becomes dominant. Further, as shown in FIG. 4, the density of the magnetic field energy W _m is highest at the center of the dielectric resonator 1. Then, it becomes exponentially smaller with increasing distance from the dielectric resonator 1 in the vertical direction, and decreases with increasing distance from the central portion of the plane of the dielectric resonator 1 in the radial direction in the horizontal direction.

When the frequency adjusting knob 5 is rotated to bring the frequency adjusting device including the frequency adjusting plate 6 and the frequency adjusting cylinder 7 closer to the dielectric resonator 1, the frequency adjusting device controls the magnetic field energy W _m . Since this pushes the area inward, the resonance frequency becomes high. At this time, FIG.
As can be seen from FIG. 4, the inner wall of the frequency adjusting device moves parallel to the distribution curve of the magnetic field energy W _m . For this reason,
Because we constantly changing constant magnetic field energy W _m is pushed inwardly by the frequency adjusting device, the dielectric resonator 1
The change of the magnetic field energy W _m distributed around is controlled to be constant. That is, the sensitivity of the frequency adjustment is linearly controlled with respect to the rotation speed of the frequency adjustment knob 5.

In this embodiment, the frequency adjusting knob 5 is made of metal, but the frequency adjusting knob 5 is not limited to metal, and a dielectric is used as the material of the frequency adjusting knob. You may use. When the dielectric is used as the material of the frequency adjusting knob in this manner, deterioration of the resonator Q of the dielectric resonator device is prevented. In this case, it is preferable to use polytetrafluoroethylene with 20% glass fiber added as the dielectric. When polytetrafluoroethylene containing 20% of glass fiber is used as the dielectric material, the heat resistance of the frequency adjusting knob is improved.

Further, in this embodiment, the frequency adjusting device is composed of the disk-shaped frequency adjusting plate 6 and the frequency adjusting cylinder 7, but it is not necessarily limited to this configuration. For example, as shown in FIG. 5B, a second frequency adjusting plate 9 having a hole at the tip of the frequency adjusting cylinder 7 is formed.
Alternatively, the second frequency adjustment cylinder 10 may be attached. If the frequency adjusting device is configured as described above, the inner wall of the frequency adjusting device approaches the distribution curve of the magnetic field energy W _m shown in FIG. 4, and the change of the magnetic field energy W _m distributed around the dielectric resonator 1 is further increased. It is controlled to be constant. Therefore, the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is improved. Further, it is preferable that the number of frequency adjusting cylinders is three or more. When the number of frequency adjusting cylinders is three or more as described above, the linearity of the change of the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is further improved. Further, in this case, it is preferable that the diameter of each frequency adjusting cylinder is configured to increase as it approaches the dielectric resonator 1. If the diameter of each frequency adjusting cylinder is increased as it approaches the dielectric resonator 1, the range of frequency adjustment becomes wider.

Further, in the present embodiment, the diameter of the frequency adjusting cylinder 7 is constant, but it is not necessarily limited to this shape. For example, as shown in FIG. 5C, the diameter of the frequency adjusting cylinder 7 may be different between the frequency adjusting plate 6 side and the dielectric resonator 1 side. If the diameter of the frequency adjusting cylinder 7 is different between the frequency adjusting plate 6 side and the dielectric resonator 1 side, the linearity of the change of the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is further improved. To do. Further, in this case, it is preferable that the diameter of the tip of the frequency adjusting cylinder 7 is larger than the diameter of the dielectric resonator 1. If the diameter of the tip of the frequency adjusting cylinder 7 is larger than the diameter of the dielectric resonator 1 in this way, the range of frequency adjustment is widened.

Further, in the present embodiment, the dielectric resonator 1 uses the fixing bolt 4a made of polytetrafluoroethylene to which 20% of glass fiber is added through the dielectric resonator support 3 made of alumina. Although it is fixed to the metal shield case 2, it is not necessarily limited to this configuration. For example, the configuration shown in FIG. 6 may be used. That is, as shown in FIG. 6, an alumina substrate 11 is interposed between the dielectric resonator 1 and the dielectric resonator support 3, and the substrate 11 uses metal bolts 12. Fixed to the shield case 2. Other configurations are shown in FIG.
Therefore, the same members are designated by the same reference numerals and the description thereof will be omitted. By adopting the above-mentioned configuration, the heat generated in the dielectric resonator 1 is easily radiated through the alumina substrate 11 and the metal bolts 12, so that the temperature characteristic of the dielectric resonator device is improved. This structure is also applicable to the dielectric resonance devices in the second to fifth embodiments described later.

<Second Embodiment> Next, a second embodiment of the dielectric resonator of the present invention will be described with reference to the drawings.

FIG. 7 shows a second embodiment of the dielectric resonance device according to the present invention.
FIG. 8A is a cross-sectional view showing the embodiment of FIG. 8A, and FIG. 8A is a plan view of a frequency adjusting plate used in the dielectric resonator device of FIG. 7 and 8
As shown in (a), the metal frequency adjustment plate 13 has
A pair of fan-shaped holes 14 that require a portion to which the frequency adjusting knob 5 is connected are opened. Since other configurations are the same as those in FIG. 1, the same members are designated by the same reference numerals and the description thereof will be omitted.

The operation of the dielectric resonance device having the above structure will be described below. In the dielectric resonator of the first embodiment, the resonance point excited by the TM mode appears as the gap between the frequency adjusting plate 6 and the dielectric resonator 1 becomes smaller. Contrary to the operation of the resonance frequency excited by the TE ₀₁ δ mode, the resonance frequency becomes lower as the gap between the frequency adjusting plate 6 and the dielectric resonator 1 becomes smaller. Finally, the two resonance points become one, and the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 deteriorates.

On the other hand, in the dielectric resonator of this embodiment, when the frequency adjusting plate 13 approaches the dielectric resonator 1, a part of the magnetic field energy passes through the fan-shaped hole 14, so that the TM mode is used. Excitation is suppressed. As a result, the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is maintained over a wide range.

As an example, in FIG. 9, the outer diameter of the frequency adjusting plate 13 is 95 mm, the diameter of the fan-shaped hole 14 is 65 mm, the diameter of the portion connected to the frequency adjusting knob 5 is 10 mm, and the center and the outer periphery are connected. Width is 5mm, plate thickness is 2
mm, the frequency adjusting cylinder 7 has an inner diameter of 84 mm and an outer diameter of 85 m.
m, knob for frequency adjustment when the length of the cylinder is 30 mm 5
7 shows how the resonance frequency changes with respect to the rotation speed. FIG.
As is clear from the above, the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is maintained over a wide range, as compared with the conventional example.

In this embodiment, two fan-shaped holes 14 are opened, but the number is not necessarily limited to this number. For example, as shown in FIG. 8B, the number of fan-shaped holes 14 may be one. If the number of the fan-shaped holes 14 is set to one as described above, the metal portion is reduced in the frequency adjusting plate 13 and the excitation in the TM mode is further suppressed. The linearity of is maintained over a wider range. Further, the number of fan-shaped holes 14 may be three or more. If the number of the fan-shaped holes 14 is three or more as described above, the metal portion of the frequency adjusting plate 13 is increased, and therefore the frequency adjusting plate 1 is formed by opening the fan-shaped holes 14.
3 is prevented from being deteriorated. In addition, the frequency adjustment plate 13
Of the magnetic field energy is prevented from deviating from the rotational axis of the frequency adjusting knob 5, and the nonuniformity of the change in the magnetic field energy is prevented. In this case, it is further preferable that the number of the fan-shaped holes 14 is an even number of 4 or more, as shown in FIG. In this way, if the number of fan-shaped holes 14 is an even number of four or more, the excitation by the TM mode is uniform in the part where the frequency adjusting knob 5 is connected to the input / output terminal 8 and the metal part where the frequency adjusting cylinder 7 is attached. Be converted.

Further, in this embodiment, the fan-shaped hole 14 is opened in the frequency adjusting plate 13, but the shape of the hole is not necessarily limited to the fan-shaped. In addition, although the frequency adjusting plate 13 is made of a metal plate in the present embodiment, the frequency adjusting plate 13 is not necessarily limited to this structure. For example, as shown in FIG. 8D, a mesh metal may be used as the frequency adjusting plate 13. As described above, when the mesh metal is used as the frequency adjusting plate 13, it is not necessary to open the holes, and therefore the deterioration of the strength of the frequency adjusting plate 13 is prevented. Further, as shown in FIG. 8E, the portion of the frequency adjusting plate 13 other than the peripheral edge may be formed of the dielectric 15. If the portion of the frequency adjusting plate 13 excluding the peripheral edge is made of the dielectric material 15, the TM mode excitation is eliminated, and the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is improved. In this case, it is preferable to use polytetrafluoroethylene with 20% glass fiber added as the dielectric 15. When polytetrafluoroethylene containing 20% of glass fiber is used as the dielectric material 15, the heat resistance of the frequency adjusting plate 13 is improved.

<Third Embodiment> Next, a third embodiment of the dielectric resonator device of the present invention will be described with reference to the drawings.

FIG. 10 is a sectional view showing a third embodiment of the dielectric resonant device according to the present invention, and FIG. 11A is a perspective view showing a frequency adjusting plate used in the dielectric resonant device of FIG. .
As shown in FIGS. 10 and 11A, the shield case 2
A frequency adjusting plate 16 formed in a bowl shape is attached to the tip of the frequency adjusting knob 5 on the inner side of the frequency adjusting knob, and a frequency adjusting device is constituted by this. Since other configurations are the same as those in FIG. 1, the same members are designated by the same reference numerals and the description thereof will be omitted.

The operation of the dielectric resonance device having the above structure will be described below. In the dielectric resonance device of the first embodiment, the frequency adjusting device is composed of the frequency adjusting plate 6 and the frequency adjusting cylinder 7, and the inner wall of the frequency adjusting device has a distribution of the magnetic field energy W _m shown in FIG. The magnetic field energy W _m is controlled by approximating the curve. However, in the connecting portion of the frequency adjusting plate 6 and the frequency adjusting cylinder 7, the deviation from the distribution curve of the magnetic field energy becomes large, and the linearity of the change of the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 deteriorates.

On the other hand, in the dielectric resonator of the present embodiment, the shape of the inner wall of the frequency adjusting plate 16 comes closer to the distribution curve of the magnetic field energy W _m shown in FIG. The linearity of the change of the resonance frequency with respect to the rotation speed is improved. The diameter of the bowl-shaped frequency adjusting plate 16 is preferably larger than the diameter of the dielectric resonator 1. Thus, the diameter of the bowl-shaped frequency adjusting plate 16 is equal to that of the dielectric resonator 1.
If it is larger than the diameter of, the range of frequency adjustment becomes wider.
The curvature of the inner wall of the bowl-shaped frequency adjusting plate 16 is δW _m
It is preferably equal to the electromagnetic field distribution described by> δW _e . If the curvature of the inner wall of the bowl-shaped frequency adjusting plate 16 is equal to the electromagnetic field distribution expressed by δW _m > δW _e , the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is further improved. To do.

In this embodiment, the frequency adjusting device is constructed by using a bowl-shaped metal plate, but it is not necessarily limited to this configuration. For example, in FIG.
As shown in (b), the frequency adjusting device has a conical metal 1 having a hollow bottom and a circular edge directed toward the dielectric resonator 1.
7 may be used. As described above, even if the frequency adjusting device is configured by using the conical metal 17 having a hollow shape and no bottom and the circular edge of which faces the dielectric resonator 1, the resonance with respect to the rotation speed of the frequency adjusting knob 5 is similarly performed. The linearity of the frequency change is improved. In this case, the diameter of the cone is preferably larger than the diameter of the dielectric resonator 1. In this way, if the diameter of the cone is larger than the diameter of the dielectric resonator 1, the range of frequency adjustment becomes wider. Further, the frequency adjusting cylinder 7 shown in the first embodiment may be attached to the bowl-shaped frequency adjusting plate 16 described above. Even if the frequency adjusting cylinder 7 is attached to the bowl-shaped frequency adjusting plate 16 as described above, the frequency adjusting knob 5 is similarly provided.
The linearity of the change of the resonance frequency with respect to the number of rotations is improved.

<Fourth Embodiment> Next, a fourth embodiment of the dielectric resonator of the present invention will be described with reference to the drawings.

FIG. 12 is a sectional view showing a fourth embodiment of the dielectric resonance device according to the present invention, and FIG. 13 (a) is a plan view showing a frequency adjusting plate used in the dielectric resonance device of FIG. .
As shown in FIGS. 12 and 13 (a), the frequency adjusting knob 5 inside the metal shield case 2 has a metal first metal having a diameter larger than that of the dielectric resonator 1 in the middle thereof. The frequency adjusting plate 18 of No. 1 is attached. Also,
A second metal frequency adjusting plate 19 having a diameter smaller than that of the dielectric resonator 1 is attached to the tip of the frequency adjusting knob 5 inside the metal shield case 2. Various methods are conceivable for attaching the first and second frequency adjusting plates 18 and 19. For example, screws or solder may be used for attachment, or the frequency adjusting knob 5, the first frequency adjusting plate 18, and the second frequency adjusting plate 19 may be integrally formed. Since the other structure is the same as that of the first embodiment shown in FIG. 1, the same members are designated by the same reference numerals and the description thereof is omitted. The operation of the dielectric resonance device configured as described above will be described below.

When the frequency adjusting knob 5 is rotated, the first
Then, the frequency adjusting device including the second frequency adjusting plates 18 and 19 is brought closer to the dielectric resonator 1. At this time, the second
Frequency adjusting plate 19 controls the magnetic field energy W _m ,
The resonance frequency becomes higher and the adjustment sensitivity of the resonance frequency becomes higher. When the frequency adjusting knob 5 is further rotated, the control of the magnetic field energy W _m by the first frequency adjusting plate 18 becomes dominant, and the adjustment sensitivity, which has once increased, decreases. Therefore, the sensitivity of frequency adjustment is averaged over a wide range.

Although the number of frequency adjusting plates fixed to the frequency adjusting knob 5 is two in this embodiment, the number is not limited to this. For example, as shown in FIG. 13B, the number of frequency adjusting plates attached to the frequency adjusting knob 5 may be three or more. If the number of frequency adjusting plates attached to the frequency adjusting knob 5 is 3 or more, the number of times the once-increased adjustment sensitivity decreases will increase, so that the resonance frequency changes with respect to the rotation speed of the frequency adjusting knob 5. Improves the linearity of. Further, in this case, it is preferable that the diameter of each frequency adjusting plate is configured to become smaller as it approaches the dielectric resonator 1. If the diameter of each frequency adjusting plate is made smaller as it gets closer to the dielectric resonator 1, the linearity of the change of the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is further improved.

Further, in this embodiment, the first and second
The frequency adjusting plates 18 and 19 are only attached to the frequency adjusting knob 5, but are not necessarily limited to this configuration. For example, as shown in FIG. 13C, the dielectric 20 is provided between the two frequency adjusting plates 18 and 19.
May be filled. If the dielectric 20 is filled between the two frequency adjusting plates 18 and 19 as described above, the strength of the frequency adjusting plate and the frequency adjusting knob 5 is increased, and the rotating operation of the frequency adjusting knob 5 is prevented. And stability is improved. In this case, it is preferable to use polytetrafluoroethylene containing 20% glass fiber as the dielectric 20. As described above, when polytetrafluoroethylene containing 20% of glass fiber is used as the dielectric 20, the heat resistance of the frequency adjusting device is improved.

In this embodiment, the second frequency adjusting plate 19 is attached to the tip of the frequency adjusting knob 5, but the present invention is not limited to this structure. For example, as shown in FIG. 13D, the first frequency adjusting plate 18 is attached to the tip of the frequency adjusting knob 5, and the second frequency adjusting plate is attached to the first frequency adjusting plate 18 via the spring 21. 19 may be attached. Second like this
If the frequency adjusting plate 19 is attached to the first frequency adjusting plate 18 via the spring 21, the second frequency adjusting plate 19 causes the dielectric resonance when the frequency adjusting knob 5 is rotated. Even after the contact with the child 1, it is possible to rotate the frequency adjusting knob 5, so that
The range of frequency adjustment is expanded.

<Fifth Embodiment> Next, a fifth embodiment of the dielectric resonator of the present invention will be described with reference to the drawings.

FIG. 14 is an internal perspective sectional view showing a fifth embodiment of the dielectric resonant device according to the present invention, and FIG.
It is a perspective view of the frequency adjusting body used for the dielectric resonance device of FIG. As shown in FIGS. 14 and 15 (a), the metal frequency adjustment knob 5 inside the metal shield case 2 has a cylindrical frequency adjustment body 2 made of metal at its tip.
2 is attached to form a frequency adjusting device. Various methods can be considered as a method of attaching the frequency adjusting body 22. For example, it may be attached using screws or solder, or the frequency adjusting knob 5 and the frequency adjusting body 22 may be integrally formed. Since the other structure is the same as that of the first embodiment shown in FIG. 1, the same members are designated by the same reference numerals and the description thereof is omitted.

The operation of the dielectric resonance device configured as described above will be described below. The frequency adjusting knob 5 is rotated to bring the frequency adjusting body 22 closer to the dielectric resonator 1. At this time, the frequency adjuster 22 sets the magnetic field energy W
By controlling _m , the resonance frequency becomes higher and the resonance frequency adjustment sensitivity becomes higher. When the frequency adjusting knob 5 is further rotated, the portion that controls the control of the magnetic field energy W _m moves from the bottom surface side of the frequency adjusting body 22 to the side surface side. Therefore, the magnetic field energy W to be controlled
The density of _m does not increase any more, and the sensitivity of frequency adjustment is kept constant.

Although the frequency adjusting knob 5 is made of metal in this embodiment, the frequency adjusting knob 5 is not limited to metal. For example, a frequency adjusting knob made of a dielectric material may be used. By using the frequency adjusting knob made of a dielectric material as described above, deterioration of the resonator Q of the dielectric resonator device can be prevented. In this case, it is preferable to use polytetrafluoroethylene with 20% glass fiber added as the dielectric. As described above, when polytetrafluoroethylene to which 20% of glass fiber is added is used as the dielectric, the heat resistance of the frequency adjusting knob is improved.

Further, in the present embodiment, the frequency adjusting body 22 is formed in a cylindrical shape, but it is not necessarily limited to this shape. For example, a frustoconical frequency adjuster in which the diameter on the frequency adjusting knob 5 side and the diameter on the dielectric resonator 1 side are different may be used. By using the frustoconical frequency adjusting body in this way, the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is improved. In this case, as shown in FIG. 15B, the frequency adjustment knob 5
It is preferable to use the frequency adjuster 23 whose diameter on the side is larger than that on the side of the dielectric resonator 1. By using the frequency adjuster 23 whose diameter on the frequency adjusting knob 5 side is larger than that on the dielectric resonator 1 side, the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is further improved. To do.

Further, in the present embodiment, the frequency adjusting body 22 is composed of one cylinder, but it is not necessarily limited to this shape. For example, FIG.
As shown in (c), a cylindrical first frequency adjuster 24
It is also possible to adopt a structure in which a cylindrical second frequency adjusting body 25 having a smaller diameter is connected to the tip of the. If the frequency adjusting device having the two-stage structure is used as described above, the second frequency adjusting body 25
Is closer to the dielectric resonator 1, the magnetic field energy W _m
The part for controlling the frequency shifts from the second frequency adjusting body 25 to the first frequency adjusting body 24, and the sensitivity of the frequency adjustment which has once increased becomes small. As a result, the frequency adjustment knob 5
The linearity of the change of the resonance frequency with respect to the number of rotations is improved. In this case, the number of frequency adjusting bodies may be three or more. As described above, when the number of frequency adjusting bodies is three or more, the number of times the once-increased adjustment sensitivity becomes smaller increases, so that the linearity of the resonance frequency change with respect to the rotation speed of the frequency adjusting knob 5 is further improved. . Further, in this case, it is preferable that each frequency adjuster is formed so that its diameter becomes smaller as it approaches the dielectric resonator 1. Also in this case, similarly, the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is improved.

In addition, in the present embodiment, the frequency adjusting body 22 is formed of a metal cylinder, but it is not necessarily limited to this. For example, FIG.
As shown in (d), the frequency adjusting body 26 may be configured by a cone whose apex faces the dielectric resonator 1 side. When the frequency adjusting body 26 is formed by the cone whose apex faces the dielectric resonator 1 side in this way, the linearity of the change of the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is similarly improved. Further, as shown in FIG. 15E, the frequency adjusting body 27 may be formed of a hemispherical metal whose plane faces the frequency adjusting knob 5 side. Also in this case, similarly, the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is improved.

Further, the above-mentioned frequency adjusting body may have a structure in which the inside is hollowed out. If the frequency adjusting body having the hollowed-out structure is used, the weight of the frequency adjusting device is reduced, and the load on the rotating operation of the frequency adjusting knob 5 is reduced.

In this case, the columnar frequency adjuster 2
The flat surface portion 2 or the apex portions of the frustoconical frequency adjusting body 23 and the hemispherical frequency adjusting body 27 may have a structure in which holes are opened, as described with reference to FIG. 8 in the second embodiment. . In this case, similarly to the second embodiment, the excitation in the TM mode is suppressed, and the linearity of the change in the resonance frequency with respect to the rotation speed of the frequency adjusting knob 5 is maintained over a wide range.

Further, in the above-mentioned first to fifth embodiments, the frequency adjusting knob 5 for displacing the position of the frequency adjusting device by the rotating operation is used as the means for displacing the position of the frequency adjusting device. The configuration is not necessarily limited to this, and, for example, a unit that slides to displace the position of the frequency adjusting device may be used.

[0081]

As described above, according to the first structure of the dielectric resonator device of the present invention, the following effects can be obtained. That is, if the means for displacing the position of the frequency adjusting device is operated to displace the frequency adjusting cylinder together with the frequency adjusting plate in the coaxial direction, the inner wall of the frequency adjusting device moves parallel to the distribution curve of the magnetic field energy. Therefore, since the magnetic field energy pushed inward by the frequency adjusting device constantly changes, the change of the magnetic field energy distributed around the dielectric resonator is controlled to be constant. That is, the sensitivity of frequency adjustment is linearly controlled with respect to the operation amount of the means for displacing the position of the frequency adjusting device.

The second dielectric resonance device according to the present invention is also provided.
According to the configuration, the following effects can be obtained. That is, since the shape of the inner wall of the frequency adjusting device comes closer to the distribution curve of the magnetic field energy, the linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is improved.

In addition, the dielectric resonator device according to the third aspect of the present invention.
According to the configuration, the following effects can be obtained. That is, when the means for displacing the position of the frequency adjusting device is operated to bring the frequency adjusting device closer to the dielectric resonator, the metal plate near the dielectric resonator controls the magnetic field energy and the resonance frequency becomes higher. The resonance frequency adjustment sensitivity increases. When the means for displacing the position of the frequency adjusting device is further operated, the control of the magnetic field energy by the metal plate close to the means for displacing the position of the frequency adjusting device becomes more dominant, and the adjustment sensitivity once increased becomes smaller. Therefore, the sensitivity of frequency adjustment is averaged over a wide range. In particular, if the number of metal plates is 3 or more, the number of times the adjustment sensitivity once increased becomes smaller,
The linearity of the change of the resonance frequency with respect to the operation amount of the means for displacing the position of the frequency adjusting device is improved.

Further, the fourth dielectric resonance device according to the present invention
According to the configuration, the following effects can be obtained. That is, when the frequency adjusting device is moved closer to the dielectric resonator by operating the means for displacing the position of the frequency adjusting device, the frequency adjusting body controls the magnetic field energy and the resonance frequency becomes higher. The adjustment sensitivity of becomes larger. When the means for displacing the position of the frequency adjusting device is further operated, the part that controls the control of the magnetic field energy shifts from the bottom surface side to the side surface side of the frequency adjustment body. Therefore, the density of the controlled magnetic field energy does not increase any more, and the sensitivity of frequency adjustment is kept constant.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of a dielectric resonator device according to the present invention.

FIG. 2 is a configuration diagram of a cylindrical dielectric resonator device according to the first embodiment of the present invention.

FIG. 3 is an electromagnetic field distribution diagram in the dielectric resonator device according to the first embodiment of the present invention.

FIG. 4 is a magnetic field distribution diagram in the dielectric resonator device according to the first embodiment of the present invention.

FIG. 5 is a perspective view of the frequency adjusting device according to the first embodiment of the present invention.

FIG. 6 is a sectional view showing another example of the first embodiment of the dielectric resonator device according to the present invention.

FIG. 7 is a sectional view showing a second embodiment of the dielectric resonator device according to the present invention.

FIG. 8 is a plan view of a frequency adjusting device according to a second embodiment of the present invention.

FIG. 9 is a characteristic diagram of the resonance frequency with respect to the rotation speed of the frequency adjusting knob in the second embodiment of the present invention.

FIG. 10 is a sectional view showing a third embodiment of the dielectric resonator device according to the present invention.

FIG. 11 is a perspective view of a frequency adjusting device according to a third embodiment of the present invention.

FIG. 12 is a sectional view showing a fourth embodiment of the dielectric resonant device according to the present invention.

FIG. 13 is a perspective view of a frequency adjusting device according to a fourth embodiment of the present invention.

FIG. 14 is a sectional view showing a fifth embodiment of the dielectric resonant device according to the present invention.

FIG. 15 is a perspective view of a frequency adjusting device according to a fifth embodiment of the present invention.

FIG. 16 is a cross-sectional view showing a conventional dielectric resonator device.

[Explanation of symbols]

 1 Dielectric Resonator 2 Shield Case 3 Dielectric Resonator Support 4a Fixing Bolt 4b Nut 5 Frequency Adjustment Knob 6, 13, 16 Frequency Adjustment Plate 7 Frequency Adjustment Tube 8 Input / Output Terminal 9 Second Frequency Adjustment Plate 10 Second frequency adjusting cylinder 11 Substrate 12 Bolt 14 Holes 15, 20 Dielectric 17 Conical metal 18 First frequency adjusting plate 19 Second frequency adjusting plate 21 Spring 22, 23, 26, 27 Frequency adjusting body 24 Fourth 1 frequency adjuster 25 second frequency adjuster

Claims (24)

[Claims] 1. A shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged so as to face the dielectric resonator in the shield case, and an outer side of the shield case. And a means for displacing the position of the frequency adjusting device provided so as to protrude, wherein the frequency adjusting device includes a frequency adjusting plate and the frequency adjusting plate of the dielectric resonator. A dielectric resonance device, comprising: a frequency adjusting cylinder provided so as to project in one direction. 2. The dielectric resonance device according to claim 1, wherein the frequency adjusting plate and the frequency adjusting cylinder are made of metal. 3. The dielectric resonator device according to claim 1, wherein the dielectric resonator is formed in a cylindrical shape, and the frequency adjusting cylinder has a diameter larger than a diameter of the dielectric resonator. 4. The dielectric resonator device according to claim 1, wherein at least three frequency adjusting cylinders are connected. 5. The dielectric resonator device according to claim 4, wherein the diameter of each frequency adjusting cylinder increases as it approaches the dielectric resonator. 6. The dielectric resonator device according to claim 1, wherein the frequency adjusting cylinder has a different diameter on the frequency adjusting plate side and on the dielectric resonator side. 7. The dielectric resonator device according to claim 6, wherein a diameter of the frequency adjusting cylinder on the dielectric resonator side is larger than a diameter of the dielectric resonator. 8. The frequency adjusting plate is provided with a hole.
2. The dielectric resonator device according to. 9. The method according to claim 8, wherein at least three holes are opened.
2. The dielectric resonator device according to. 10. The dielectric resonator device according to claim 9, wherein the number of holes is an even number of four or more. 11. The dielectric resonance device according to claim 1, wherein the frequency adjusting plate is made of a mesh metal. 12. The dielectric resonator device according to claim 1, wherein a portion of the frequency adjusting plate excluding the peripheral edge is made of a dielectric material. 13. A shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged so as to face the dielectric resonator in the shield case, and an outer side of the shield case. A dielectric resonance device comprising: means for displacing the position of the frequency adjusting device provided so as to protrude, wherein the frequency adjusting device is a bowl-shaped or hollow conical shape without a bottom surface. A dielectric resonance device comprising a plate. 14. The frequency adjusting plate is made of metal.
3. The dielectric resonator device according to item 3. 15. The dielectric resonator is formed in a cylindrical shape, and the bowl-shaped frequency adjusting plate or the conical frequency adjusting plate having no cavity and a bottom surface has a diameter larger than the diameter of the dielectric resonator. 13. The dielectric resonator device according to item 13. 16. A shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged in the shield case so as to face the dielectric resonator, and an outer side of the shield case. A dielectric resonance device having means for displacing the position of the frequency adjusting device provided so as to protrude, wherein the frequency adjusting device is composed of a plurality of metal plates arranged at predetermined intervals. A characteristic dielectric resonance device. 17. The dielectric resonator device according to claim 16, wherein the area of each metal plate becomes smaller as it approaches the dielectric resonator. 18. The dielectric resonator device according to claim 16, wherein a dielectric is filled between the metal plates. 19. The dielectric resonator device according to claim 16, wherein a spring is interposed between the metal plates. 20. A shield case, a dielectric resonator arranged in the shield case, a frequency adjusting device arranged so as to face the dielectric resonator in the shield case, and an outer side of the shield case. And a means for displacing the position of the frequency adjusting device protrudingly provided in the dielectric resonator device, wherein the frequency adjusting device comprises a convex frequency adjusting body. . 21. The frequency adjusting body is made of metal.
0. The dielectric resonator device according to item 0. 22. The dielectric resonance device according to claim 20, wherein the frequency adjusting device has a multi-stage structure including a plurality of frequency adjusting bodies. 23. The frequency adjusting knob for displacing the position of the frequency adjusting device is a frequency adjusting knob for displacing the position of the frequency adjusting device by a rotating operation.
21. The dielectric resonant device according to either 6 or 20. 24. The dielectric resonator is fixed to a shield case via a dielectric substrate.
21. The dielectric resonance device according to any one of 20.