JPS61174801A - High frequency electronic equipment - Google Patents

Abstract

PURPOSE:To improve impedance matching by transmitting a signal through a connecting piece between a center conductor of a plug seat and a terminal part of an electronic circuit and adjusting the interval between a projecting piece of the connecting piece and an external conductor of the plug seat. CONSTITUTION:An input terminal 11 is attached to a case. A connecting piece 24 is so placed that the tip of a center conductor 14 is inserted into a through hole 27 of the piece 24, and the center conductor 14 and the connecting piece 24 are connected. Meanwhile, a base part 21 of an earth body 20 is connected to an earth conductor 9 of a circuit board 5 by soldering. Next, the circuit board 5 is inserted into the case and is fixed so that an external conductor 12 of the input terminal 11 is inserted to an open part 23 of the earth body 20 and a base part 25 of the connecting piece 24 is put on a terminal part 6a of a filter 6. The external conductor 12 and rising parts 22 are soldered. The capacitance component is varied by deforming the projecting piece 28 to vary the distance to the external conductor 12.

Description

[Detailed description of the invention] The present invention aims to solve the following problems.

(Industrial Application Field) This invention relates to electronic equipment that handles high-frequency signals, and specifically relates to the structure of the connecting portion between a plug seat and an electronic circuit in such equipment.

(Prior Art) In a conventional high-frequency electronic device, a center conductor of a connector seat attached to a case and a terminal portion of an electronic circuit provided in the case at a position apart from the center conductor are connected. Those that connect with a connecting piece tend to have poor impedance matching between the valve socket and the electronic circuit, which has the problem of causing loss in signal transmission between the valve socket and the electronic circuit. .

(Problems to be Solved by the Invention) This invention eliminates the above-mentioned conventional problems and can easily adjust the impedance matching characteristics between the two to improve the impedance matching characteristics, thereby transmitting high-frequency signals with less loss. The aim is to provide high-frequency electronic equipment that can

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) A signal is transmitted through the connection piece between the center conductor in the valve seat and the terminal part in the electronic circuit. By moving the overhanging piece closer to or away from the external conductor on the socket, the capacitance between the external conductor and the overhanging piece changes, and the impedance between the socket and the electronic circuit changes. . Therefore, by appropriately adjusting the distance between the external conductor and the overhanging piece, it is possible to improve the impedance matching between the plug seat and the electronic circuit.

(Example) Below, drawings showing examples of the present application will be described. In FIGS. 1 to 7, in the converse 1 for satellite transmission and reception shown as an example of high-frequency electronic equipment,
Reference numeral 2 denotes a case, which is made of a conductive material such as aluminum alloy, but may also be made of synthetic resin.

In the drawing, only the intermediate frame of the case 2 is shown, excluding the lid covering the front and back sides, respectively. 3 indicates a partition frame, and 4 indicates an electronic circuit housed within the case.

In this, 5 is a circuit board, and on its negative side there is a filter 6 formed of a microstrip circuit, a mixing circuit 7,
An intermediate frequency amplification circuit 8 and the like are provided at 6jη, and a ground conductor 9 is provided over the entire surface of the other side. 10 indicates a local oscillation circuit.

The electronic circuit 4 may be a lumped constant type circuit. Next 11
is an input terminal, which has an outer conductor 12, an insulator 13, and a center conductor 1.
4, and a mounting screw 15.
It is fixed to the case 2 by screwing it into the mounting hole 16 of the case 2. Reference numeral 17 denotes an output terminal attached to the case 2, which similarly uses a plug seat. Next, 20 is a grounding body formed by bending a conductive plate, 21 is a base, 22 is a rising part, and 23 is a missing part. Next, 24 is a connecting piece formed by bending a conductive plate such as a copper plate or a brass plate, 25 is a base, 26 is a rising part, 27 is a through hole, and 28 is a projecting piece. Incidentally, the length of the overhang piece 28 is formed to be shorter than the wavelength A of the signal to be handled.

Next, the assembly order of the above structure will be explained. First, case 2
Attach input terminal 11 to. Next, position the connecting piece 24 so that the tip of the center conductor 14 enters the through hole 27,
The center conductor 14 and the connecting piece 24 are connected (soldering the tip of the center conductor 14 and the edge of the through hole 27), while the base 21 of the grounding body 20 is connected to the grounding conductor 9 of the circuit board 5 by soldering. Connect the circuit board Fi5 so that the external conductor 12 of the input terminal 11 enters into the missing part 23 of the grounding body 20 to be connected, and the base 25 of the connecting piece 24 overlaps the terminal part 6a of the filter 6. Insert it into case 2 and fix it. Next, the external conductor 12 and the rising portion 22 are connected by soldering, and the terminal portion 6a and the base portion 25 are connected by soldering. This completes the assembly work.

In the case of the above configuration, the 3 input to the input terminal 11
, 7 to 4.2 GIIz is input to the terminal portion 6a of the filter 6 through the connecting piece 24 from the center conductor 14. The signal passes through the filter 6 and is mixed with the signal from the local oscillator circuit 10 in the mixing circuit 7 to approximately IGII.
z intermediate frequency No. 13, and the signal is amplified by the amplifier circuit 8 and output from the output terminal 17.

An isometric circuit diagram between the input terminal 11 and the filter 6 in the above configuration is shown in FIG. In this figure, 3o is the inductance of the center conductor 14, 3o
1 represents the inductance of the rising portion 26 of the connecting conductor 24, and 32 represents the capacitance formed between the overhang piece 28 and the external λi#12 and a portion electrically connected thereto (case, etc.). The size of the capacitance 32 can be changed by deforming the overhanging piece 28 to move it closer to or farther away from the outer conductor 12, and as a result, the impedance can be changed.

Therefore, in the case where the above assembly is completed, the input terminal 11
If the impedance matching between the filter 6 and the filter 6 is poor, the impedance matching between the two can be improved by adjusting the overhanging piece 28 as described above.

As is well known, the adjustment is performed by connecting a measuring device to a predetermined location and deforming the overhanging piece 28 to move it closer to or away from the external conductor 12, so that the characteristics read by the measuring device are the best. I will make it happen.

Next, FIG. 7 shows an example of the change in characteristics caused by operating the overhang piece 28 as described above.

In FIG. 7, A shows the characteristics when the overhanging piece 28 is separated from the outer conductor 12, and B shows the characteristics when it is brought closer.

Next, FIG. 8 shows a different embodiment of the present application, in which the overhanging piece 28e is moved to the left in the drawing (or to the right as shown by the two-dot chain line).
This shows an example in which the material is lifted in an overhanging manner.

In addition, for parts that are considered to have the same or equivalent configuration as those in the previous figure in terms of functionality, the same reference numerals as in the previous figure are appended with an alpha e and a m? J [Explanation omitted.

(Also, in the case after the mouthpiece, r, g, and h of the alpha vent are given in order based on the same idea, and redundant explanations are omitted.) Next, FIGS. 9 and 10 show further different embodiments of the present application. A stepped portion 34 is provided at the tip of the center conductor 14f so that the connection piece 24r can be positioned with respect to the outer conductor 12f when the connection piece 2.1 is attached to the center conductor 14''. This is an example.

Next, FIGS. 11 and 12 show one of the central donor bodies with a stepped portion.
Each of the 11 structures shows a different example.

(Effects of the Invention) As described above, the present invention has the advantage that when transmitting a signal between the valve seat 11 and the electronic circuit 4, the signal can be transmitted through the connecting piece 24.

Furthermore, in the present invention, when the electronic circuit 4 is removed from the case 2 for repair and then reattached to the case 2 and connected to the connector seat 11, the connector seat 11 is damaged due to poor assembly accuracy. Even if the impedance matching characteristics between 11 and the electronic circuit 4 deteriorate, the above-mentioned impedance matching characteristics can be improved by deforming the projecting piece 28 and moving it closer to or away from the outer conductor 12 in the plug seat 11. As a result, the signal can be transmitted again with less loss.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a front view with the lid removed, FIG. 2 is a perspective view of the main part, and FIG. 3 is a view in the direction of the ■ arrow in FIG. 2. Figure 4 is a sectional view taken along the line IV-IV (the plug seat is only partially cut away) Figure 5 is an exploded perspective view of Figure 2, Figure 6 is an equivalent circuit diagram, and Figure 7 is frequency and return loss. FIG. 8 is a graph showing the relationship between FIG. 8 and FIG. 3, which shows a different embodiment, FIG. The perspective view showing the end of the center conductor, FIGS. 11 and 12, shows the center conductor 0.
:;; A perspective view showing a further different example of the shape of the part. 2... Case, 4... Electronic circuit, 11... Junction seat, 24... Connection piece, 28... Overhang piece. -1 Preview ζ Mouth illusion 6 Figure S Figure 9 Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] In a high-frequency electronic device, an electronic circuit is housed in a case, a connector seat is attached to the case, and the terminal part of the electronic circuit and the center conductor of the connector seat are connected by a connecting piece. The connecting piece shall be provided with an overhanging piece made of a flexible conductive material and extending from the connecting part of the connecting piece with the center conductor so as to face the outer conductor of the plug seat. High-frequency electronic equipment featuring