JPH0220003B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coupling rod inserted and fixed into a center hole of a dielectric coaxial resonator, and a method for fixing this coupling rod.

Although the dielectric coaxial resonator itself is well known,
To explain with reference to FIG. 1 just in case, the 1/4 wavelength dielectric coaxial resonator 1 consists of an inner wall surface of a cylindrical (cylindrical, rectangular cylinder, etc.) body 2 made of titanium oxide ceramic dielectric, etc. The inner conductor 3 and outer conductor 4 are formed by baking silver paste on the outer circumferential surface or by electroless copper plating, and an electrode 5 for short-circuiting the inner conductor 3 and outer conductor 4 is similarly formed on the entire bottom surface in the figure. It is formed by a method.

Since the inner conductor 3 is often coupled to an external circuit via a capacitor, conventionally, as shown in FIG. The connecting rod 7 and the inner conductor 3 were inserted into the center hole, and the connecting rod 7 and the inner conductor 3 were bonded together using a conductive adhesive 8 at this time.

Such conventional connecting rod structures and methods of fixing the connecting rods are time-consuming and difficult to reduce the cost of the product because they are time-consuming and the connecting rods themselves are expensive.

The main object of the invention is to provide a coupling rod and a method of fixing the coupling rod that is simple and inexpensive.

The gist of the invention in Item 1 is that a coupling rod for a dielectric coaxial resonator has a stopper part protruding in the width direction midway in the longitudinal direction of a substantially rectangular flat metal plate, and a stopper part protruding in the width direction across the stopper part. It has an external connection part, and the other side is hollowed out leaving the periphery, and this part of the periphery is formed in an arch shape to be slightly larger than the diameter of the through hole in the dielectric material, giving it elastic fixing and connection parts. It is characterized by having the following. The essential point of the invention as set forth in item 2 is that in the method for fixing a coupling rod in a dielectric coaxial resonator, the coupling rod has a stopper portion protruding in the width direction midway in the longitudinal direction of a substantially rectangular flat metal plate; It has an external connection part on one side in the longitudinal direction, and the other side is hollowed out leaving the periphery, and a part of this periphery is formed in an arch shape so that it is slightly larger than the hole diameter of the inserted object. A connecting rod having elastic fixing and connecting parts is prepared, solder plating or paste solder is applied to the fixing and connecting parts in advance, and the rod is inserted into the through hole of the dielectric and heated. It is characterized in that the inner conductor provided in the through hole and the connecting rod are soldered.

The main object and other objects and features of this invention will become clear from the examples described below.

FIG. 2 shows an embodiment of the present invention, and the same parts as in FIG. 1 are given the same numbers and their explanation will be omitted.

Reference numeral 10 denotes a connecting rod according to an embodiment of the present invention, which has stopper portions 11, 11 protruding in the width direction midway in the longitudinal direction of a substantially rectangular metal flat plate, and a connecting rod for external connection on one longitudinal side across the stopper portion. The other side is hollowed out leaving a periphery 13, and a part of this periphery 13 is formed in an arch shape so as to be slightly larger than the center hole diameter of the resonator 1, and has an elastic fixing/connecting part 14. has.

Here, the connecting rods 10 of this embodiment can be manufactured in large numbers very easily and at the same time, for example, by punching out unnecessary parts from a band-shaped metal flat plate by press working.

This coupling rod 10 is inserted into the center hole from the open end of the resonator 1 and soldered to the inner conductor 3. Preferably, thick solder plating or creamy solder is applied to the connecting rod 10 in advance, and after insertion, the connecting rod 10 is heated and soldered.

As is clear from the above embodiments, according to the present invention, the connecting rod is formed simply by punching out a metal plate, so it is inexpensive. In addition, since it is elastic, it will not fall off or shift until it is soldered, and the inner conductor is dug into the inner conductor to ensure a secure connection, and it can also absorb variations in processing accuracy. Furthermore, it has good workability, can reduce manufacturing costs, and is stable and highly reliable against temperature changes.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional example, FIG. 2 is a partially sectional front view of an embodiment of the present invention, and FIG. 3 is a perspective view of a connecting rod. 10 is a connecting rod, 11 is a stopper portion, 12 is an external connection portion, 13 is a periphery, and 14 is a fixing/connection portion.

Claims (1)

[Scope of Claims] 1 The above-mentioned inner features of a dielectric coaxial resonator in which a through hole is formed in a dielectric material, an inner conductor film is formed on the inner peripheral surface of the through hole of the dielectric material, and an outer conductor film is formed on the outer peripheral surface of the dielectric material. A connecting rod for connecting a conductive film to an external circuit, the connecting rod having a stopper portion protruding in the width direction halfway in the longitudinal direction of a substantially rectangular flat metal plate,
It has an external connection part on one longitudinal side of the stopper part, and a fixing/connecting part on the other side, and the fixing/connecting part leaves the periphery of the other side of the flat metal plate. In addition to hollowing out, a part of the periphery is formed into an arch shape slightly larger than the diameter of the through hole of the dielectric, and the arched portion retains an elastic force when inserted into the through hole of the dielectric. A coupling rod for a dielectric coaxial resonator, characterized in that the coupling rod is located in pressure contact with the inner conductor film. 2. A dielectric coaxial resonator in which a through hole is formed in a dielectric material, an inner conductor film is formed on the inner peripheral surface of the through hole, and an outer conductor film is formed on the outer peripheral surface of the dielectric material, and the inner conductor film is connected to an external circuit. A method for fixing a joining rod to be joined, wherein the joining rod has a stopper part protruding in the width direction midway in the longitudinal direction of a substantially rectangular flat metal plate, and a stopper part protruding in the width direction between the stopper parts. It has an external connection part on one side and a fixing/connecting part on the other side, and the fixing/connecting part hollows out the periphery of the other side of the metal flat plate, and also cuts out a part of the periphery. Prepare an arch-shaped piece that is slightly larger than the diameter of the through-hole of the dielectric, and after applying solder plating or paste solder to the fixing/connection part in advance, insert it into the through-hole of the dielectric. A method for fixing a coupling rod in a dielectric coaxial resonator, the method comprising: inserting the coupling rod into a dielectric coaxial resonator, and soldering the inner conductor film of the through hole and the coupling rod by heating.