JPS635286Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention uses dielectric coaxial using a cylindrical dielectric.
Regarding frequency adjustment structure of TEM resonator.

Conventionally, as shown in FIG. 1, an inner conductor 12 and an outer conductor 13 are formed on the inner and outer circumferential surfaces of a cylindrical dielectric body 11 formed by sintering a titanium oxide ceramic dielectric body into a cylindrical shape. dielectric coax
TEM resonators 14 are generally known.

By the way, in the dielectric resonator 14 as described above, the resonant frequency can be adjusted to the target frequency by cutting the end face of the cylindrical dielectric 11 and adjusting its height h.
Adjustment of the resonant frequency has been very troublesome, since the resonant frequency has been adjusted by changing the resonant frequency or by pasting dielectric pieces 15, 15 on the end face of the cylindrical dielectric 11 with an adhesive or the like.

The present invention was made in view of the above circumstances, and is a dielectric coaxial TEM using a cylindrical dielectric.
In a resonator, a dielectric device in which a frequency adjustment piece made of a metal member provided separately from the terminal member is inserted into the dielectric body so that the desired resonance frequency can be easily obtained by adjusting the position of the frequency adjustment piece. The purpose is to provide a frequency tuning structure for a body-coaxial TEM resonator.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the present invention, for example, as shown in FIG.
A frequency adjustment piece 17 made by bending a metal wire, which is a metal member referred to in the present invention, into a hairpin shape and having a spring property is inserted into the center hole 16 of a dielectric resonator 14 similar to that shown in the figure, and the dielectric resonance The frequency adjusting piece 17 is fixed to the inner conductor 12 of the dielectric resonator 14 with solder or adhesive at a position where the resonant frequency of the resonator 14 becomes a target resonant frequency. Note that the terminal member is provided separately from the frequency adjustment piece 17, but is not shown.

By doing so, the inductance component of the dielectric resonator 14 changes depending on the fixed position of the frequency adjustment piece 17, and the resonant frequency of the dielectric resonator 14 can be easily adjusted to a target frequency.

Next, another embodiment of the present invention is shown in FIG.

In the embodiment shown in FIG. 3, the dielectric resonator 14 includes a wire-shaped conductor 2, as shown in FIG.
1 is inserted into the center hole 16 in the middle part of the U.
A terminal member 25 is provided with a letter-shaped portion 22, and has flat plate portions 23, 23 formed at both ends thereof, and electrodes 24a, 24a of coupling capacitors 24, 24 are soldered to these flat portions 23, 23, respectively. has.

Inside the center hole 16 of the dielectric resonator 14, together with the terminal member 25, is a metal member according to the present invention having a width approximately equal to the diameter of the center hole 16, as shown in FIG. Frequency adjustment pieces 27, 27 made of metal pieces and having protrusions 26, 26 formed in the center thereof are connected to the protrusions 26, 2.
The protruding ends of 6 are butt-jointed and then press-fitted.

The frequency adjustment pieces 27, 27 are the dielectric resonator 1
The resonance frequency of No. 4 is fixed at a position that matches the target frequency.

The same operation and effect as the embodiment shown in FIG. 2 can be obtained even in the above manner.

In the embodiment shown in FIG. 3, instead of the frequency adjustment pieces 27, 27 made of metal pieces, a hairpin-shaped frequency adjustment piece 17 similar to that shown in FIG. 2 is used as shown in FIG. You can.

Furthermore, in the above embodiments, the terminal member 25 and the frequency adjustment pieces 17 and 27 are not limited to the shapes of the above embodiments.

As is clear from the detailed description above, the present invention adjusts the resonant frequency of the dielectric resonator by inserting a frequency adjustment piece made of a metal member provided separately from the terminal member into the cylindrical dielectric. Since the adjustment is made, the desired resonance frequency can be easily obtained by adjusting the position of the frequency adjustment piece.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the frequency adjustment structure of a conventional dielectric coaxial TEM resonator, FIG. 2 is an explanatory diagram of an embodiment of the frequency structure of the dielectric coaxial TEM resonator according to the present invention, and FIG. FIG. 4 is an explanatory diagram of a terminal member of the embodiment of FIG. 3; FIG. 5 is an explanatory diagram of a frequency adjustment member of the embodiment of FIG. 3; FIG. 6 is an explanatory diagram of a modification of FIG. 3. 11... Cylindrical dielectric, 12... Inner conductor, 13
... Outer conductor, 14 ... Dielectric resonator, 16 ... Center hole, 17, 27 ... Frequency adjustment piece, 25 ... Terminal member.

Claims (1)

[Scope of utility model registration request] An inner conductor and an outer conductor are respectively formed on the inner and outer circumferential surfaces of a cylindrical dielectric body having a center hole in its axial center, and the terminal is inserted and fixed into the center hole and electrically connected to the inner conductor. In a dielectric coaxial TEM resonator having a member, a metal member is provided separately from the terminal member and has a spring property in a center hole of the dielectric member and is movable in the axial direction of the dielectric member with respect to the terminal member. Insert a frequency adjustment piece made of a member while pressing it into contact with the inner conductor,
The frequency adjustment piece of the dielectric coaxial TEM resonator is characterized in that the frequency adjustment piece is fixed in the center hole of the dielectric at a position where the resonant frequency of the dielectric coaxial TEM resonator matches a target frequency. Adjustment structure.