JPS6319081B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a triplate line type microwave circuit that transmits and processes microwaves using a triplate line.

Figures 1a and 1b show the configuration of a conventional triplate line type microwave circuit. Figure 1a is a plan view showing the main parts cut away, and Figure 1b is a cross-sectional view. , in the figure, 1a and 1b are dielectric substrates, 2
a, 2b are external conductors, 3a, 3b are input/output terminals,
4a and 4b are internal conductors. Here, the input/output terminals 3a and 3b are shown as through-hole conductors realized by chemical machining technology, and the internal conductors 4a and 4b are shown only as transmission lines to simplify the explanation.

This conventional triplate line type microwave circuit will be briefly described below. Conventionally, outer conductor 2
a, 2b, dielectric substrates 1a, 1b and internal conductor 4
In the case of a triplate line type microwave circuit in which the input/output terminals 3a and 3b are formed perpendicular to the surface to which the outer conductors 2a and 2b are attached, the inner conductors 4a and 4b are attached. Input/output terminals 3a, formed on dielectric substrates 1a, 1b,
3b is directly connected to one end of the internal conductor 4a, 4b by a through-hole conductor, and the electrical connection between the input/output terminal 3a and the input/output terminal 3b taken out in the opposite direction is that the input/output terminal 3a, 3b is directly connected. Internal conductor 4a and internal conductor 4b at the other end
This was realized by overlapping predetermined sections.

However, in this conventional triplate line type microwave circuit, the connection between the input/output terminal 3a and the input/output terminal 3b was realized by contacting by overlapping the internal conductors 4a and 4b. If the dielectric substrates 1a and 1b are required to be thinner, the thickness of the dielectric substrates 1a and 1b must be made thinner. As a result, the width of the internal conductors 4a, 4b becomes narrower, and it is often observed that the connection between the overlapped portions of the internal conductors 4a, 4b, that is, the electrical connection between the input/output terminals 3a, 3b cannot be made sufficiently. .

The triplate line type microwave circuit according to the invention eliminates the above-mentioned drawbacks and its purpose is to improve reliability.

FIGS. 2a and 2b are configuration diagrams showing an embodiment of the triplate line type microwave circuit according to the present invention, and FIG.
Figure b shows its cross-sectional view. In the figure, 1a and 1b are dielectric substrates, 2a and 2b are external conductors, 3a and 3b are input/output terminals, and 4a and 4b are internal conductors. Here, the input/output terminals 3a, 3b are shown as through-hole conductors realized by chemical machining technology, and the internal conductors 4a, 4b are shown as through-hole conductors.
For simplicity of explanation, only the transmission line is shown.

Hereinafter, the triplate line type microwave circuit according to this explanation will be explained in detail. In this invention, the outer conductors 2a, 2b, the dielectric substrates 1a, 1b
Input/output terminals 3a, 3b are connected to external conductors 2a, 2b on a triplate line consisting of internal conductors 4a, 4b.
In the case of a triplate line type microwave circuit formed perpendicularly to the surface to which internal conductors 4a and 4b are adhered, input/output terminals 3a and 3b formed on dielectric substrates 1a and 1b on which internal conductors 4a and 4b are adhered are connected to the internal conductors 4a and 4b, respectively. Conductor 4a, 4
The electrical connection between the input/output terminals 3a and 3b taken out in the reflection direction is directly connected to one end of b via a through-hole conductor.
Internal conductor 4 at the other end where b is not directly connected
This is realized by overlapping the above and b by increasing the width of the predetermined section. For this reason, the reliability of the connection between the input and output terminals 3a and 3b is lower than that of the conventional dielectric substrate 1a,
There is no disadvantage that it depends on the thickness of the internal conductors 1b, and since the width of the overlapping part of the internal conductors 4a and 4b is widened, the connection of the input/output terminals 3a and 3b by surface contact between the internal conductors 4a and 4b is reliable. sexuality is on the rise. In this case, the internal conductors 4a, 4 that do not overlap
Matching between the tri-plate line composed of the overlapping wide internal conductors 4a and 4b and the tri-plate line composed of the overlapping internal conductors 4a and 4b is achieved by
If the length of 4b is selected to be λg/2 (λg is the equivalent wavelength), no problem will occur.

3a and 3b are configuration diagrams showing other embodiments of the triplate line type microwave circuit according to the present invention, FIG. 3a is a plan view showing the main part cut away, and FIG. FIG. Here, in this figure, input/output terminals are omitted to simplify the explanation, and the internal conductors 4a and 4b are also shown only as transmission lines.

Hereinafter, a triplate line type microwave circuit according to another embodiment of the present invention will be described.

In this invention, the overlapping inner conductors 4a and 4b are formed in a step-like manner. This constitutes an impedance converter using the narrow portions of the overlapping internal conductors 4a and 4b, and is effective when the frequency is high or when it is desired to widen the band of the transmission line.

As described above, in the triplate line type microwave circuit according to the present invention, the internal conductors 4a and 4b are widened and overlapped to realize electrical connection of the input and output terminals 3a and 3b taken out in opposite directions. , which is effective in improving reliability. Although this invention has been described with reference to the case where through-hole conductors are used for the input/output terminals 3a and 3b, the present invention is not limited to this.
It can also be used when using commercially available connectors.

[Brief explanation of the drawing]

Figures 1a and 1b show the configuration of a conventional triplate line type microwave circuit, in which figure a is a plan view showing the main parts cut away, figure b is a cross-sectional view,
Figures 2a and 2b show configuration diagrams of a triplate line type microwave circuit according to the present invention. Figures a and b show configuration diagrams of a triplate line type microwave circuit according to another embodiment of the present invention. It is. In the figure, 1a, 1b are dielectric substrates, 2a, 2b are external conductors, 3a, 3b are input/output terminals, 4a, 4b
is the inner conductor. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

Claims (1)

[Claims] 1. Using two dielectric substrates with inner conductors and outer conductors adhered to opposing surfaces, these two dielectric substrates are stacked with the outer conductors on the outside, and the outer conductors of both outer conductors are The input/output terminals are attached perpendicular to the surface to which they are attached, and each input/output terminal is directly connected to one end of the internal conductor attached to the board on the side of each input/output terminal, and the other end of the internal conductor is connected to a predetermined section weight. A triplate line type microwave circuit formed to match each other, characterized in that the width of the overlapping internal conductor is wider than the width of the internal conductor to which input/output terminals are connected. wave circuit. 2. The triplate line type microwave circuit according to claim 1, wherein the overlapping internal conductors are formed in a step-like manner.