JPS6334322Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a microwave circuit such as a transistor amplifier, an attenuator, and a frequency converter using an isolator.

As shown in the first front view, the structure of a conventional microwave transistor amplifier includes input and output terminals at both ends of a unit amplifier 2 housed in a metal container (case). The structure was such that a unit amplifier 2 was sandwiched between 3 parts. Note that 11 and 12 are input/output connectors, 13 and 14 are terminators, and isolators 1 and 3 are circulators having three branches, with a terminator provided in one branch, or the like. For this reason, when replacing the unit amplifier 2, the two isolators 1 and 3 and the unit amplifier 2 must be removed, resulting in a disadvantage that they cannot be easily replaced. In addition, when connecting this amplifier 2 in multiple stages, the second
As shown in the block diagram in the figure, two isolators 3 and 1 are required between the unit amplifier 2 and the unit amplifier, which has the disadvantage of not only being very uneconomical but also increasing the size.

The purpose of this invention is to eliminate the drawbacks of the conventional devices and create a structure in which the bias electrodes and signal input/output terminals supplied to the functional elements can be attached and removed using sockets, thereby making it easier to replace the functional elements and improving the functionality. An object of the present invention is to provide a microwave circuit in which elements can be connected in multiple stages through one isolator.

The microwave circuit of the present invention is configured to include at least a circuit unit having the function of amplifying, attenuating or converting the frequency of microwaves and having input and output terminals protruding from one mounting surface, and first and second isolators assembled side by side facing the mounting surface of the circuit unit, and is characterized in that the input terminal of the circuit unit is connected to the output terminal of the first isolator, and the output terminal of the circuit unit is connected to the input terminal of the second isolator via a socket through which the isolators and the circuit unit are assembled.

The present invention will be explained in detail below with reference to the drawings.

3 is a front view of an embodiment of the present invention, FIG. 4 is a perspective view of FIG. 3, and FIG. 5 is a partially exploded front view of FIG. 3. In the figure, an input isolator 1 and an output isolator 3 of a unit amplifier 2 are connected, and the connection terminal of each isolator to the amplifier is fitted into one surface of a socket 5. On the opposite side of the socket 5 from the isolator, a unit amplifier 2 having connection terminals protruding in only one direction is attached by a holding plate 20 and a fixing screw 21.

As shown in FIG. 5, this socket 5 is provided with a socket 8 connected to the center conductor 9 of the isolators 1 and 3, and a bias supply socket 6 supported by an insulator 7. Connected to the connecting pin.

With such a structure, the unit amplifier 2 can be easily replaced by simply removing the holding plate 20 and the mounting screw 21. Furthermore, in the case of multi-stage connection of amplifiers 2 as shown in FIG. 6, only one isolator 4 between unit amplifiers is required. That is, as shown by the dotted line in FIG. 4, in the case of multi-stage connection, it is possible to use an inter-stage isolator 4 in which sockets 5 connected to unit amplifiers 2 are provided before and after the input/output terminals. As shown in the figure, one isolator can be saved.

In addition, in this embodiment, the unit amplifier 2 is connected to the holding plate 2.
Although the isolator 1 is assembled with the screws 21 using the unit amplifier 2, it is clear that the holding plate 20 may be omitted if the unit amplifier 2 has sufficient strength.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional transistor amplifier, Fig. 2 is a block diagram when two stages of conventional amplifiers are connected, and Fig. 3 is a front view of an embodiment of the present invention.
4 is an exploded perspective view of FIG. 3, FIG. 5 is a partially exploded front view of FIG. 3, and FIG. 6 is a block diagram of a two-stage connection according to an embodiment of the present invention. In the figure, 1...input isolator, 2...unit amplifier,
3... Output isolator, 4... Interstage isolator, 5... Socket, 6... Unit amplifier bias supply socket, 7... Insulator, 8... Signal supply socket, 9... Isolator center conductor, 1
1, 12... Input/output connector, 13, 14... Termination device, 20... Unit amplifier holding plate, 21...
This is the set screw for the holding plate.

Claims (1)

[Scope of utility model registration request] A circuit unit having the function of amplifying, attenuating, or converting the frequency of microwaves and provided with an input terminal and an output terminal protruding from one mounting surface, and a first circuit unit assembled in line opposite the mounting surface of this circuit unit. and a second isolator, an input terminal of the circuit unit is connected to an output terminal of the first isolator, and an output terminal of the circuit unit is connected to an input terminal of the second isolator. A microwave circuit, characterized in that each of the isolators and the circuit unit are assembled via.