JPS58123202A - Triplate line type microwave circuit - Google Patents

Abstract

PURPOSE:To improve reliability by superposing internal conductor on each other widely and making electric connection with input/output terminals led out in the opposite directions. CONSTITUTION:On the triplate line consisting of external conductors 2a and 2b, dielectric substrates 1a and 1b, and internal conductors 4a and 4b, input/output terminals 3a and 3b are formed at right angles to the adhered surfaces of the external conductors 2a and 2b to constitute a triplate line type microwave circuit. In this case, the input/output terminals 3a and 3b formed on the dielectric substrates 1a and 1b where the internal conductors 4a and 4b are adhered are connected directly to one-side terminals of the internal conductors 4a and 4b through through-hole conductors and the input/output terminals 3a and 3b led out in the opposite directions are connected electrically by superposing on the internal conductor 4b at the other terminal where the input/output terminals 3a and 3b are not connected directly so that the width is increased in a prescribed section. Consequently, the reliability of the connection between the input/ output terminals 3a and 3b by the face contacting between the internal conductors 4a and 4b is improved.

Description

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

FIGS. 1(a) and 1(b) show the configuration of a conventional triplate line type microwave circuit, and FIG. b) is a cross-sectional view of the same, in which (la) and (lb) are dielectric substrates.

(2a) (2b) are external conductors, (8a) (8b
) are input/output terminals.

(4a) (4b) is the internal conductor. Here, the input/output terminals (8a) (8b) are shown as through-hole conductors realized by chemical machining technology, and the internal conductors (4a) (4b) are shown only as transmission lines to simplify the explanation.

This conventional triplate line type microphone A-wave circuit will be briefly described below. Conventionally, external conductors (2a) (2b)
, dielectric substrates (la) (lb) and internal conductors (4a)
) (4b) to the input/output terminal (
In the case of a triplate line type microwave circuit in which 8a) (8b) is formed perpendicularly to the surface to which the outer conductors (2a) and (2b) are attached, the dielectric wire to which the inner conductors (4a and 4b) are attached The input/output terminals (8a) (8b) formed on the body substrate (la) (, 1b) are connected to internal conductors (4a) (4
The electrical connection between the input/output terminal (8a) and the input/output terminal (8b), which are directly connected to one end of b) with a through-hole conductor and taken out in the opposite direction, is the input/output terminal (8a) (8b).
This was realized by overlapping a predetermined section of the inner conductor (4a) and the inner conductor (4b) at the other end, which are not directly connected to each other.

However, in this conventional triplate line type microwave circuit, the connection between the input/output terminal (8a) and the input/output terminal (3b) was realized through contact by overlapping the internal conductors (4a) and (4b). 1. Dielectric substrate (LA) is used when the frequency is high or when weight reduction is required.
The thickness of the internal conductor (lb) must be reduced, and in this case, in order to satisfy the matching between the connector, cable, etc. and the triplate A-type microphone wave circuit, the internal conductor (lb) must be made thinner.
4a) The width dimension of (4b) becomes narrower, and the inner conductor (4a
(4b) It has often been observed that the electrical connection between the overlapping portions of the same, that is, the input/output terminals (8a) and (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. 2(a) and 2(b) are configuration diagrams showing an embodiment of a triplate line type microwave circuit according to the present invention, and FIG. (b) shows a cross-sectional view of the same. In the figure, (la) and (1b) are dielectric substrates, (2a) and (2b) are external conductors,
(8a) (8b) are input/output terminals, (4a) (4
b) is an internal conductor. Here, input/output terminal (8ai
(8b) is shown as a through-hole conductor realized by chemical machining technology, and internal conductors (4a) and (4b) are shown only as transmission lines to simplify the explanation.

Hereinafter, the triplate line type microwave circuit according to this explanation will be explained in detail. In this invention, the outer conductor 1
2a) (2b) - Trigray 11 consisting of dielectric substrate (la) (11)) and internal conductor (4a) (4b)
・In the case of a tri-rate line type microwave circuit in which input/output terminals (8t4.7 (8b) are formed perpendicularly to the adhering surfaces of the outer conductors (2a) and (12b)), the inner conductor (4
a) Dielectric substrate (la) (l) coated with (4b)
The input/output terminals (8a) (8b) formed in b) are directly connected to one end of the internal conductor (4a) (t4o) by a through-hole conductor, and the input/output terminal (8a) is taken out in the reflection direction. The electrical connection between the input/output terminal (8b) and the input/output terminal (8b) is made by overlapping the internal conductor (4b) at the other end to which the input/output terminal (8a) and (8b) are not directly connected, with a predetermined section width widened. It has been realized. For this reason, the input/output terminal (
There is no disadvantage that the reliability of the connection between 8a) and (8b) depends on the thickness of the dielectric substrates (la) and (lb) as in the past, and the width of the overlapping portion of the internal conductors (4g) and (4b) Since the dimensions are wide, the internal conductor (4a) 14b
) The reliability of the connection between the input and output terminals (8a) and (8b) by surface contact is increasing. In this case, the matching between the triplate line made up of 9 non-overlapping internal conductors (4a) (4b) and the triplate line made up of 9 overlapping internal conductors (4a) (4b) is as follows: The length of the internal conductor (4ai (4b)) is 2ai2 (2g
FIG. 8(a) is a block diagram showing another embodiment of the triplate line type microwave circuit according to the present invention, and FIG. 3(a)
1 is a plan view showing a main part cut away, and FIG. 8 6) is a sectional view thereof. In this figure, input/output terminals are omitted to simplify the explanation, and the internal conductors (4a+ (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 internal conductors (4a) and (4b) are formed in a stepped shape. This is one overlapping inner conductor (
4a) (When the impedance converter is configured with the narrow part of 4bi and the frequency is high or the transmission
This is effective when you want to widen the bandwidth.

As described above, in the triple-plate entwined microwave circuit according to the present invention, the internal conductors (4a) (4b) are widened and the input/output terminals (8) are brought out in the opposite direction.
a) Since the electrical connection of (8b) is achieved, it is effective in improving scratch resistance. In addition.

In this invention, the case where K through-hole conductors are used for the input/output terminals f8a) (8b) has been described, but the present invention is not limited to this, and can also be used when commercially available connectors are used.

[Brief explanation of drawings]

Figures 1(a) and 1(b) are from a book showing the configuration of a conventional metric plate line type microwave circuit. 2(a) and 2(b) show the configuration of the triplate line type microwave circuit according to the present invention, and FIG. b) is its cross-sectional view, No. 8
Figures (a) and (b) show configuration diagrams of a triplate line type microwave circuit according to another embodiment of the present invention. (b)
is a sectional view thereof. In the figure, (fla) (lb) is a dielectric ridge substrate, (2
a) (2b) is the outer conductor, (8a) and (8b) are the input/output terminals, and (4a) and (4b) are the inner conductors. In FIG. 1, the same or corresponding parts are designated by the same reference numerals. Agent Makoto Kuzuno - Figure 1 (1≧・nlb (b) Figure 2 (cL) lb (bn)

Claims (2)

[Claims] (1) Using two dielectric substrates with inner conductor and outer conductor adhered to opposing surfaces, these two dielectric substrates are stacked with the outer conductor on the outside, and one outer conductor is adhered to the other side. The input/output terminals are installed vertically, 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 formed so as to overlap in a predetermined section. In a triplate line type microwave circuit consisting of 9
A triplate line type microwave circuit characterized in that the width of the overlapping internal conductors is wider than the width of the internal conductor connected to the input/output terminals. (2) The triplate line type microwave circuit described in item (1) of the patent document *, characterized in that the overlapping internal conductors are formed in a stepped shape.