JPH02277302A - Magnetic field coupling loop - Google Patents

Abstract

PURPOSE:To change the distance between a magnetic field coupling loop and a dielectric resonator without moving the position of the dielectric resonator by using a conductor wire with an optional length so as to vary the coupling with the dielectric resonator. CONSTITUTION:One terminal of a conductor wire 5 is soldered to a fixture 4 and the other terminal is soldered to center conductor of a connector 3. The magnetic field coupling loop is formed by the center conductor 6, the conductor wire 5 and the fixture 4 and applies magnetic coupling to an electromagnetic wave inputted/outputted through the connector 3 to the dielectric resonator 2. In this case, when the conductor wire 5 with a long length is employed, the size of the magnetic field coupling loop is increased and the coupling is strengthened and when the conductor wire 5 with a short length is employed, the coupling is decreased. Thus, the coupling of the electromagnetic wave inputted/outputted through the connector 3 with the dielectric resonator 2 is varied optionally in any case by varying the length of the conductor wire 5.

Description

[Detailed Description of the Invention] [Summary] Regarding the magnetic field coupling loop of a device that magnetically couples electromagnetic waves input and output from a connector to a dielectric resonator built in a metal case such as a dielectric filter, the position of the dielectric resonator is determined. A connector that inputs and outputs electromagnetic waves is designed for the purpose of a magnetic coupling loop with a structure that allows the distance between the magnetic coupling loop and the dielectric resonator to be easily changed without moving it, and is not affected by external vibrations. One end of a conductor wire of any length is soldered to a metal fitting that can be soldered to fix it to a metal case containing a dielectric resonator, and the other end is soldered to the center conductor of the connector. .

[Industrial application field]

The present invention relates to a dielectric filter and the like that perform magnetic field coupling, and particularly to a magnetic field coupling loop that magnetically couples electromagnetic waves input and output from a connector to a dielectric resonator such as a dielectric filter.

In recent years, with the miniaturization of microwave communication devices, microwave resonators have shifted from cavity resonators to dielectric resonators, and filters composed of multiple resonators have also changed to dielectric resonators using dielectric resonators. Filters are becoming popular. In dielectric filters, it is necessary to couple electromagnetic waves input and output from input and output connectors to dielectric resonators, so a magnetic coupling loop is used. The structure must be such that the size of the coupling loop can be changed in order to adjust the

[Conventional technology]

As shown in FIG. 3, this magnetic field coupling loop conventionally connects electromagnetic waves input and output from a connector 3 attached to a metal case 1 to a center conductor 6 of the connector and a metal rod connecting the tip of the center conductor to the metal case 1. The dielectric resonator 2 is magnetically coupled to the dielectric resonator 2 by a magnetic coupling loop consisting of 7 and 7.

However, since the metal rod 7 of the magnetic field coupling loop is screwed to the metal case 1, the size of the magnetic field coupling loop is fixed, and it is difficult to change the size of the coupling loop. As a result, in order to change the distance between the magnetic field coupling loop and the dielectric resonator 2 in order to adjust the characteristics of the dielectric filter, it is possible to change the position of the dielectric resonator 2. It has a structure in which multiple dielectric resonators are lined up, and the mutual spacing between these multiple dielectric resonators is also an important element in terms of filter characteristics, so it must be changed. In fact, it is not possible to change the position of the dielectric resonator 2, including the mutual spacing of the resonators, to change the spacing from the magnetic coupling loop.

In addition, in order to create a magnetic field coupling loop structure in which the distance between the magnetic field coupling loop and the dielectric resonator 2 can be changed, a thin conductor wire (not shown) is used instead of the metal rod 7, and one end of the conductor wire is connected to a connector. There is also a structure in which the center conductor 6 of 3 is soldered and the other end is not fixed and can move freely.
A magnetic field coupling loop having such a structure has a problem in that it is easily influenced by external vibrations and its characteristics are unstable.

[Problem to be solved by the invention]

The present invention provides a magnetic field structure that allows the distance between the magnetic field coupling loop and the dielectric resonator to be easily changed without moving the position of the dielectric resonator, and that is not affected by external vibrations. The challenge is to provide a bonding loop.

[Means to solve the problem]

As shown in FIG. 1, this problem involves fixing a connector 3 to a metal case 1 with a metal fitting 4 that can be soldered, and attaching the negative end of a conductor wire 5 of an arbitrary length to the metal fitting 4. This is solved by the magnetic field coupling loop of the invention, which is configured to be soldered and the other end soldered to the center conductor 6 of the connector.

In the principle diagram of FIG. 1 showing the configuration of the magnetic field coupling loop of the present invention, 1 is a metal case that has a dielectric resonator 2 inside and has a connector 3 for outputting electromagnetic waves.

Reference numeral 2 denotes a dielectric resonator that is installed inside the metal gate 1, magnetically coupled with the electromagnetic waves input and output from the connector 3 through a loop, and resonates.

Reference numeral 3 denotes a connector which is fixed to the metal case 1 and inputs and outputs electromagnetic waves that are magnetically coupled to the dielectric resonator 2.

Reference numeral 4 denotes a solderable metal fitting for fixing the connector 3 to the metal case 1.

5 has one end soldered to the center conductor 6 of the connector 3,
It is a conductor wire whose length is arbitrarily set and whose other end is soldered to the metal fitting 4.

6 is the center conductor of the connector 3 to which one end of the conductor wire 5 is soldered.

[Effect]

The length of the conductor wire 5 is arbitrarily set, and one end of the conductor wire 5 is soldered to the center conductor 6 of the connector 3, and the other end is soldered to the metal fitting 4, so that the electromagnetic waves input and output from the connector 3 are transferred to the dielectric. For strong coupling to the resonator 2, the length of the conductor wire 5 is increased to increase the size of the conductor wire loop formed between the center conductor 6 of the connector 3 and the metal fitting 4. Conversely, in order to weaken the coupling with the dielectric resonator 2, the length of the conductor wire 5 is shortened to reduce the size of the conductor wire loop formed between the center conductor 6 of the connector 3 and the metal fitting 4.

In any case, the coupling of the electromagnetic waves input and output from the connector 3 to the hexaplex resonator 2 can be changed arbitrarily without moving the dielectric resonator 2, and since both ends are fixed with half-rII connections, it is possible to control the connection from the outside. The problem is solved because the influence of vibration is small.

〔Example〕

The principle diagram in FIG. 1 is a sectional view showing the configuration of a magnetic field coupling loop according to an embodiment of the present invention, and FIG. 2 is a side view thereof.

In the figure, the same parts as those shown in FIG. 3 of the conventional example are indicated by the same symbols, and ■ is a metal case, 2 is a dielectric resonator, and 3 is a connector, such as a small SMA type. The coaxial connector includes a metal fitting 4 that can be soldered, a conductor wire 5 whose length can be arbitrarily set, and a center conductor 6 of the connector 3.

The connector 3 is screwed to the metal fitting 4 from inside the metal case 1, and one end of a conductor wire 5 is soldered to the metal fitting 4. The other end of the conductor wire 5 is soldered to the center conductor 6 of the connector 3.

A magnetic field coupling loop is formed by the center conductor 6, the conductor wire 5, and the metal fitting 4, and the electromagnetic waves input and output through the connector 3 are magnetically coupled to the dielectric resonator 2 bonded to the metal case 1 with adhesive or the like. It works to make things happen.

At this time, if a long wire is used as the conductor wire 5, the magnetic field coupling loop will be large and it will come closer to the dielectric resonator 2, so the coupling will be stronger; conversely, if a wire with a short length is used as the conductor wire 5. If used, the magnetic field coupling loop becomes smaller and moves away from the dielectric resonator 2, so that the coupling becomes weaker.

In any case, the coupling of electromagnetic waves input and output from the connector 3 to the dielectric resonator 2 can be changed arbitrarily by changing the length of the conductor wire 5 without moving the dielectric resonator 2. Since both ends are fixed by soldering, there is no problem because it is less affected by external vibrations and the characteristics are stable.

〔Effect of the invention〕

As explained above, according to the present invention, the coupling of input and output electromagnetic waves to the dielectric resonator can be easily changed by soldering conductor wires of arbitrary length without moving the dielectric resonator. It is easy to adjust the dielectric filter using a dielectric resonator to the required characteristics, and both ends of the conductor wire are
Since it is made of a lunar metal, it is resistant to external vibrations, which improves the characteristics of the dielectric filter and reduces manufacturing costs.

[Brief explanation of drawings]

Figure 1 is a principle diagram showing the configuration of the magnetic field coupling loop of the present invention, Figure 2 is a side view showing the configuration of the magnetic field coupling loop of the embodiment of the present invention, and Figure 3 is a diagram showing the configuration of the conventional magnetic field coupling loop. FIG. In the figure, 1 is a metal case, 2 is a dielectric resonator, 3 is a connector, and 4
5 is a metal fitting, 5 is a conductor wire, 6 is a center conductor, and 7 is a metal rod. (Between cross-sections) Boar 1 Mouth (I-law surface M of the 10th menawakai cohesive sol loop) Magnetic field signature of the 1st subtenth Suga loop me configuration friend T cross-sectional view part 3

Claims (1)

[Claims] A dielectric resonator (
2) In a device that magnetically couples electromagnetic waves input and output from a connector (3), a conductor wire (5) of any length is attached to a solderable metal fitting (4) that fixes the connector to the metal case. A magnetic coupling loop characterized in that one end is soldered and the other end is soldered to the central conductor (6) of the connector.