JPH0418802A - Dielectric resonator - Google Patents

Abstract

PURPOSE:To arbitrarily set a resonance frequency and to facilitate the setting by varying the length of an inner conductor in a reentrant dielectric resonator. CONSTITUTION:One end part in a longitudinal direction is set to be an open surface 1 and the other end part to be a short-circuited position adjustment area 10. In the short-circuited position adjustment area 10, an extended conductor 11 and an adjustment conductor piece 9 short-circuiting the extended conductor 11 of the inner conductor and an external conductor 5 are provided for the inner conductor. In such a case, the length of the inner conductor is varied and the arbitrary resonance frequency can be set by varying a short-circuited position by the adjustment conductor piece 9. Thus, manufacture of the dielectric resonators different in resonance frequency for respective frequencies is made unnecessary.

Description

[Detailed Description of the Invention] [Table of Contents]! Important industrial fields of application Prior art (Figure 4) Means for solving the problems to be solved by the invention (No. 115) Working examples (Figure 2) Application examples (Figure 3) Effects of the invention [Summary] Regarding dielectric resonators, the purpose of making it possible to change the resonant frequency arbitrarily in a semi-coaxial type dielectric resonator is to provide an inner conductor and an outer conductor through a dielectric material. In a semi-coaxial type dielectric resonator, one end in the longitudinal direction is an open surface, and the other end is a short-circuit position adjustment area, and the short-circuit position adjustment area has an extension conductor of the inner conductor and this An adjustment conductor piece is provided to short-circuit between the extension conductor of the inner conductor and the outer conductor, and by varying the short circuit position by the adjustment conductor piece, the length of the inner conductor can be varied and an arbitrary resonant frequency can be set.

[Industrial application field]

The present invention relates to a dielectric resonator, and more specifically, to a dielectric resonator used as a main resonator of a high-frequency oscillator, and particularly to a dielectric resonator in which the resonant frequency of a semi-coaxial type dielectric resonator can be varied.

[Conventional technology]

Dielectric resonators, particularly semi-coaxial type dielectric resonators, are commonly used as the main resonator of high frequency oscillators.

FIG. 4 is a diagram showing a conventional dielectric resonator as described above, in which (A) is a perspective view (outside view) and (B) is a side sectional view. In the figure, ■ is an open surface, 2 is a short-circuit surface, 3 is a dielectric,
4 is a connection terminal, 5 is an outer conductor (silver plated part), 6 is a short-circuit conductor (silver plated 7 raw part), 7 is an inner conductor (silver plated part), and 8 is a cavity.

As shown in the figure, the conventional dielectric resonator has a cavity 8 in the longitudinal direction at the center, and around this cavity 8, an inner conductor 7 is provided by plating with silver (Ag). Further, a dielectric material 3 is provided around the inner conductor 7, and a silver (A
g) The outer conductor 5 is provided by plating.

One end in the longitudinal direction is an open surface 1, and the other end is a short-circuit surface 2. On the open surface 1, an inner conductor 7 and
The outer conductor 5 is insulated by the dielectric 3, and the inner conductor 7 is connected to the connection terminal 4. Further, on the short-circuiting surface 2, the inner@conductor 7 and the outer conductor 5 are short-circuited by a short-circuiting conductor 6 formed by plating with silver (Ag).

[Problem to be solved by the invention]

The conventional method described in - has the following drawbacks.

(1) The resonant frequency of a dielectric resonator is determined by the length of the inner conductor. Therefore, in the conventional dielectric resonator as described above, since the length of the inner conductor is fixed, it is difficult to vary the resonant frequency.

(2) In general, in high-frequency circuits that use distributed constants, it is difficult to manufacture a dielectric resonator at a calculated resonant frequency.

Therefore, dielectric resonators having different resonance frequencies must be manufactured for each frequency. Therefore, the cost is high.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such conventional drawbacks and to make it possible to arbitrarily vary the resonant frequency in a semi-coaxial type dielectric resonator.

[Means to solve the problem]

FIG. 1 is a diagram of the principle of the present invention (a plan view of a dielectric resonator), and in the figure, the same symbols as in FIG. 4 indicate the same parts, and
Reference numeral 9 indicates an adjustment conductor piece, 10 indicates a short-circuit position adjustment region, and 11 indicates an extension conductor (1 part silver-plated) of the inner conductor.

In order to achieve the above object, the present invention provides a semi-coaxial type dielectric resonator in which an inner conductor and an outer conductor are provided through a dielectric, in which one end in the long hair direction is an open surface 1 and the other end is an open surface 1. The end of the short-circuit position adjustment area 10 and the short-circuit position adjustment area! 0 is provided with an adjustment conductor piece 9 that short-circuits between the extension conductor 1 of the inner conductor, the extension conductor 11 of the inner conductor, and the outer conductor 5, and by varying the short-circuit position by the adjustment conductor piece 9 described in iii. The length of the inner conductor can be varied to set an arbitrary resonance frequency.

[Function] Since the present invention is constructed as described in ``-'', it has the following effects.

In a semi-coaxial type dielectric resonator, the resonant frequency is determined by the length of the inner conductor.

Therefore, in order to set the resonance frequency, the adjusting conductor piece 9 is moved within the short-circuit position adjusting region 10 and fixed at a position where the inner conductor length becomes a predetermined length to short-circuit.

This short circuit electrically and mechanically connects the extension conductor 11 of the inner conductor to the center of the adjustment conductor piece 9, and also electrically and mechanically connects the outer conductor 5 at both ends of the adjustment conductor piece 9. do.

In this way, an arbitrary resonance frequency can be set simply by varying the short circuit position by the adjustment conductor piece 9.

〔Example〕

Embodiments of the present invention will now be described based on the drawings.

FIG. 2 is a diagram showing a dielectric resonator according to an embodiment of the present invention, in which (A) is a perspective view (outside view), (f3) is a side view, (C) is a side sectional view, ( D) is a cross-sectional view taken along the XY line.

In the figure, the same reference numerals as in FIGS. 1 and 4 indicate the same parts.

In this example, as a semi-coaxial type dielectric resonator,
Make the structure as shown. That is, there is a cavity 8 in the longitudinal direction of the center, and around this cavity 8 there is an inner conductor 7 coated with silver (Ag), and on the outside thereof there is a conductor 7 plated with silver (Ag) via a dielectric 3. An outer conductor 5 is provided by processing.

One end in the longitudinal direction is an open surface I, and the other end is a short circuit position adjustment region 10. In this short circuit position adjustment area 10, the extension conductor 11 of the inner conductor 7 is made of silver (Ag).
The adjustment conductor piece 9 is provided by plating or the like, and is provided so as to be substantially perpendicular to the extension conductor 11.

The inner conductor 7 shown in F and its extension conductor 11 are formed by silver plating or the like, and the two types of bodies are integrated.

The adjustment conductor piece 9 is placed at a position where the length of the inner S conductor matches the resonance frequency to be set, and the extension conductor 1 is placed at the center of the adjustment conductor piece 9.
1 with silver-containing solder, etc., and furthermore, at both ends,
It is connected to the outer conductor 5 using silver-containing solder or the like.

In addition, in the short-circuit position adjustment region 10, the parts other than the extension conductor 11 and the adjustment conductor piece 9 are made of a dielectric material 3, and an outer conductor 5 made of silver plating or the like is formed on the lower side and side surface of the dielectric material 3. has been done. In addition, nothing is provided on the ■-recording area 10 and the type bodies 9 and 11.

FIG. 3 is a diagram showing an application example of the present invention, in which I
2 is a semi-coaxial type dielectric resonator of the present invention, 4 is a connection terminal thereof, 13 is an oscillation transistor, and 14 to 16 are capacitors.

In this application example, the dielectric resonator of the present invention is applied to a high frequency oscillator.

The dielectric resonator 12 connects the connection terminal 4 to the base of the oscillation transistor 13 via the capacitor 14 to form an oscillation circuit.

In order to change the oscillation frequency in this oscillation circuit, the resonant frequency of the dielectric resonator may be changed as shown in the above embodiment.

〔Effect of the invention〕

As explained above, the present invention has the following effects.

(+) Since the length of the inner conductor in the semi-coaxial type dielectric resonator can be varied, the resonant frequency can be set arbitrarily, and the setting is also easy.

(2) Since any resonant frequency can be set with one type of dielectric resonator, there is no need to manufacture dielectric resonators for each frequency as in the past.

Therefore, the cost is reduced.

[Brief explanation of drawings]

1V is a principle diagram of the present invention (a plan view of a dielectric resonator), FIG. 2 is a diagram showing a dielectric resonator according to one embodiment of the present invention, FIG. 3 is a diagram showing an application example of the present invention, FIG. 4 is a diagram showing a conventional dielectric resonator. ■ Open surface 3-Dielectric 4-Connecting conductor 5-Outer conductor 9- Adjustment conductor piece ■ 11 pieces of inner conductor For patent [head person] Fujitsu Limited

Claims (1)

[Claims] In a semi-coaxial type dielectric resonator in which an inner conductor and an outer conductor are provided through a dielectric, one end in the longitudinal direction is an open surface (1) and the other end is an open surface (1). A short circuit position adjustment area (10) is provided, and the short circuit position adjustment area (10) includes an extension conductor (11) of the inner conductor, and a short circuit between the extension conductor (11) of the inner conductor and the outer conductor (5). An adjustment conductor piece (9) is provided, and the adjustment conductor piece (9)
9) A dielectric resonator characterized in that by varying the short circuit position, the length of the inner conductor can be varied and an arbitrary resonant frequency can be set.