JPH07288406A - Connecting structure for band pass filter - Google Patents

Abstract

PURPOSE:To simplify and miniaturize the device by connecting each band pass filter to a conductor arranged over an almost full length in a lengthwise direction inside a conductor case. CONSTITUTION:A conductor 21 is arranged over the almost full length in the lengthwise direction inside a conductor case 11. A pin 22 is fixed and connected to this conductor 21 corresponding to a band pass filter 1 to be connected, and the top end of this pin 22 is protruded from the conductor case 11 toward a joint part direction on one terminal side of the band pass filter 1. On the other hand, a contact 23 to touch the pin 22 is provided at each band pass filter 1 while being protruded from one terminal side joint part toward the direction of the pin 22. By touching these pin 22 and contact 23, the band pass filter 1 and the conductor 21 are connected, and a central conductor is constituted. Thus, signals to be inputted/outputted from the case 11 are respectively connected through the conductor 21, pin 22 and contact 23 to the plural band pass filters 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of a filter used for a waveguide line of a microwave communication device or the like, and more particularly to a bandpass filter having a simple and small size and a small connection loss. Signal connection structure

[0002]

2. Description of the Related Art Conventionally, when connecting a plurality of band pass filters used in a waveguide line of a microwave communication device or the like, as shown in FIG. A circulator 3 for adjusting the signal reflectance is provided at each connection.
This is carried out by connecting 0s and connecting the circulators 30 with the intermediate connection parts 31 respectively.

[0003]

However, in this conventional band-pass filter connection structure, since each band-pass filter is connected by independent parts, each connection part, especially the intermediate part, is connected. There has been a problem that an intermediate loss is likely to occur in the connecting portion (connector portion) of the connecting component. Further, in this conventional band-pass filter connection structure,
Since independent connecting parts, that is, a circulator and an intermediate connecting part for connecting the circulator and the circulator, are required, there is a problem that the entire apparatus becomes large in size and high in cost. further,
In the conventional connection structure of the band pass filter, the mounting space of the circulator must be taken into consideration, and there are problems such as mounting restrictions when constructing the demultiplexing circuit.

Japanese Patent Laid-Open No. 220501/1990 proposes a waveguide-converter connection method in which a converter and a waveguide are connected by a power supply pin connected to a stripline of a substrate. . However, the technique described in this publication relates to the connection between a normal waveguide and a converter, and does not provide any solution to the problems of the prior art that occur when connecting a plurality of bandpass filters with a circulator. It is not mentioned or disclosed.

The present invention has been proposed in order to solve the problems of the prior arts described above, and it is possible to easily and surely achieve efficient signal connection with less connection loss only by using a simple and small structure. An object of the present invention is to provide a connection structure for a bandpass filter that can be obtained.

[0006]

In order to achieve the above object, the band-pass filter connection structure of the present invention is a connection structure for connecting a plurality of band-pass filters arranged in parallel in the same direction. There is a hollow conductor case for signal input / output arranged orthogonally to the upper surface of the joint on one end side of the plurality of band pass filters, and is arranged over substantially the entire length in the longitudinal direction inside the conductor case. A conductor and connected to this conductor, and
Inside the band pass filter, pins whose ends project from the conductor case toward the junction of the band pass filter and are provided in correspondence with the plurality of band pass filters, respectively. And a spacer for holding the pin and the contact. Preferably, the spacer is provided with an insulator. If necessary, a contact that contacts the pin and a spacer that holds the contact may be provided between the conductor and the pin, or the insulator may be formed of polytetrafluoroethylene. is there.

[0007]

According to the band-pass filter connection structure of the present invention having the above-mentioned structure, since each band-pass filter is connected by one conductor, a signal connection without intermediate loss can be obtained. The device can be simplified and downsized. Further, by changing the lengths of the pins and the spacers, the reflectance of the signal can be adjusted and only a specific signal can be passed.
Furthermore, since the pin contact is used to connect the conductor and each band pass filter, the connection work can be performed very easily.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the band-pass filter connection structure of the present invention will be described below with reference to the drawings. 1 is a perspective view showing a first embodiment of a connection structure for a bandpass filter according to the present invention. FIG. 2 shows a partial side sectional view of FIG. In these figures, 1 is a band-pass filter to be connected, and at least a plurality of band-pass filters are arranged in parallel in the same direction. Reference numeral 11 denotes a hollow conductor case for inputting / outputting a signal, which is arranged orthogonal to the upper surface of the joint portion on one end side of the plurality of bandpass filters 1 to be connected.

Reference numeral 21 denotes a conductor, which is arranged over substantially the entire length of the conductor case 11 in the longitudinal direction. A pin 22 is fixedly connected to the conductor 21 in correspondence with a plurality of bandpass filters 1 to be connected, and a tip of the pin 22 extends from the conductor case 11 to one end of the bandpass filter 1. It projects toward the side joint part (downward in the drawing).
Further, each bandpass filter 1 is provided with a contact 23 in contact with the pin 22 so as to project from the one end side joint portion toward the pin 22 direction (upward direction in the drawing). When the pin 22 and the contact 23 come into contact with each other, the bandpass filter 1 and the conductor 21 are connected to each other to form a central conductor.

As a result, the signals input / output from the conductor case 11 as the input / output unit are connected to the plurality of band pass filters 1 via the conductor 21, the pin 22 and the contact 23, respectively. Here, as shown in FIG. 3, the pin 22, the contact 23, and the spacer 12, 1 of the central conductor
By changing the length of 3, the reflectance of the signal can be adjusted and only a specific signal can be passed, and it plays the role of a circulator in the connection structure of the conventional bandpass filter.

The pin 22 and the contact 23 are held from the outside by spacers 12 and 13, respectively. Inside the spacers 12 and 13, insulators 25 and 26 for insulating the signal line of the central conductor from the ground circuit are provided.
Are provided respectively. In this embodiment, the insulators 25 and 26 are made of polytetrafluoroethylene (registered trademark “Teflon” of duPont). By thus forming the insulators 25 and 26 of polytetrafluoroethylene, the center conductor composed of the pin 22 and the contact 23 becomes a coil on the circuit, and the insulator 2
Reference numerals 5 and 26 are capacitors, which form an optimum line of 50Ω. In addition, as the material of the insulator,
Polyethylene may be used instead of polytetrafluoroethylene.

According to the band-pass filter connection structure of this embodiment having such a configuration, since each band-pass filter 1 is connected by the single conductor 21, there is no intermediate loss and reliable. It is possible to obtain various signal connections and to simplify and miniaturize the device. Furthermore, conductor 2
Since pin contacts are used to connect 1 and each band pass filter 1, connection work can be performed very easily.

Next, a second embodiment of the connection structure of the band-pass filter of the present invention will be described with reference to FIG. Figure 4
FIG. 6 is a partial side cross-sectional view showing a second embodiment of the connection structure of the bandpass filter of the present invention. As shown in the figure, in this embodiment, a contact 24 and a spacer 14 for holding the contact 24 via an insulator 27 are provided between the conductor 21 and the pin 22. Thus, the conductor 2
By providing the contact 24 between the pin 1 and the pin 22, it is possible to easily replace the spacer and the pin for adjusting the signal reflectance.

[0014]

As described above, according to the band-pass filter connection structure of the present invention, a plurality of band-pass filters can be connected to a signal only by a simple and compact structure without independent connecting parts. In addition, the cost and size of the device can be reduced, and since there is no intermediate connecting component, connection loss can be reduced and efficient signal connection can be achieved. Furthermore, by using pin contacts for the signal connection lines, signal connection can be easily and reliably obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of a connection structure for a bandpass filter according to the present invention.

FIG. 2 is a partial side sectional view of FIG.

FIG. 3 shows a front view of the first embodiment of the connection structure of the bandpass filter of the present invention.

FIG. 4 is a partial side sectional view of a second embodiment of the connection structure of the bandpass filter of the present invention.

FIG. 5 shows a perspective view of a connection structure of a conventional bandpass filter.

[Explanation of symbols]

 1 ... Band pass filter 11 ... Conductor case 12 ... Spacer 13 ... Spacer 14 ... Spacer 21 ... Conductor 22 ... Pin 23 ... Contact 24 ... Contact 25 ... Insulator 26 ... Insulator 27 ... Insulator 30 ... Circulator 31 ... Intermediate Connection parts

Claims (4)

[Claims] 1. A connection structure for connecting a plurality of band-pass filters, which is used for signal input / output and arranged orthogonally to an upper surface of a joint on one end side of the plurality of band-pass filters. A hollow conductor case, a conductor provided in the conductor case over substantially the entire length in the longitudinal direction, a conductor connected to the conductor case, and a tip protruding from the conductor case toward a joint portion of the bandpass filter. , A pin provided in correspondence with each of the plurality of band pass filters, a contact provided in the band pass filter for making contact with each of these pins, and a spacer for holding the pin and the contact. A connection structure of a bandpass filter characterized by the above. 2. The connection structure for a bandpass filter according to claim 1, wherein a contact that comes into contact with the pin and a spacer that holds the contact are provided between the conductor and the pin. 3. The bandpass filter connection structure according to claim 1, wherein an insulator is provided in the spacer. 4. The bandpass filter connection structure according to claim 3, wherein the insulator is made of polytetrafluoroethylene.