JPH0243802A - Power distributor - Google Patents

Abstract

PURPOSE:To reduce the length of an output line and to decrease the loss by making one end of an input strip conductor as an open end and forming plural output strip conductors radially to a branch part apart from the opening end by nearly 1/2 wavelength. CONSTITUTION:The opening end 10 is provided to one end of the input strip conductor 4 and a branch part 11 is provided to the input strip conductor 4 at a position from the open end 10 apart by nearly 1/2 wavelength. Four 1/4 wavelength converter 9 are connected to the input line 7 in the branch part 11 and branched radially from the branch part 11 and other output line 8 is connected to each 1/4 wavelength converter 9 respectively. Thus, the power is distributed radially at the arrangement of the output line 8 simply, the length of the output line 8 is decreased and the power loss due to the line is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power divider on a transmission line mainly used in microwaves.

[Conventional technology]

There are the following power dividers that distribute microwaves on transmission lines as necessary.

That is, FIG. 4 shows the 1977-e FiFiK MTT-
8international Microwave
FIG. 2 is a configuration diagram showing, for example, a four-power distributor shown in Elympium Digest.

In the figure, (1) is a flat ground conductor, (2) is a dielectric substrate stacked on this ground conductor (1), (4) is an input strip conductor, and (5) is an output strip conductor. Tsubu conductor,
(6) is a strip conductor of a quarter-wavelength transformer; (7) is an input line consisting of the ground conductor (1), the dielectric substrate (2), and the IJ tube conductor (4); (8)
is an output line consisting of the ground conductor (1), the dielectric substrate (2), and the output strip conductor (5), and (9) is the ground conductor fi+, the dielectric substrate (2), and the strip conductor. (6) A 1/4 wavelength transformer consisting of U) is an isolation resistor.

(110) is a branch.

The strip conductors i4), f5), and (6) are integrally constructed.

Also, the above strip conductor! 41, +5+, +
6+ constitutes a microstrip line together with the ground conductor [1] and the dielectric substrate (2).

The four quarter wavelength transformers (9) are connected to the human power line (7) at the 0 branch (110), and each quarter wavelength transformer (9) has a separate output line (8). It is connected.

The three isolation resistors α2 are 1/4 wavelength transformers (
9) and the output line (8) are connected to each other so as to connect adjacent lines.

The four quarter-wavelength transformers (9) are connected to the 0 branch part (110) of the dielectric substrate (21) toward the end face opposite to the human power line (7)
), and each output line (8) is formed to have approximately the same width as the input line (7). In this way, the input terminal P1 is formed on the end face of the input line (7), and the output terminals P2 to P5 are formed at the tips of each output line (8).

In addition, the 1/4 wavelength transformers (9) are each 1/4 wavelength transformer (9) viewed from the branching part (110) to the output terminals P2 to P5 side.
The input line (
The line width is determined to be equal to the characteristic impedance of 7).

Next, the operation will be explained.

The microwave incident from the input terminal P1 passes through the 0 branch (1
10) to the output terminals P2 to P5 of the four output lines (8) at a distribution ratio according to the input impedance ratio when looking at the output terminals P2 to P5.

At this time, impedance matching seen from the input terminal P1 is obtained by the action of the 1/4 wavelength transformer (9), so
The microwave incident on the input terminal P1 is distributed to the output terminals P2 to P5 without being reflected.

Moreover, each output terminal P2 to Ps (output line (8)) is.

Mutual isolation is obtained by the action of the isolation resistor a2.

[Problem to be solved by the invention]

Since a conventional power divider is configured with one or more 1/4 wavelength transformers, a plurality of 1/4 wavelength transformers extending from the 0 branch to each output line are oriented in almost the same direction, and 1/4 wavelength transformers are arranged radially around the power divider. When distributing force, the layout of the output line becomes complicated and the output line becomes longer, which causes problems such as increased loss.

This invention was made to solve the above problems, and provides a power divider that can distribute power radially with a simple arrangement of output lines, shorten the length of the output lines, and reduce loss. The purpose is to obtain.

[Failure to solve the problem]

In the power divider according to the present invention, the strip conductor is integrally constituted by an input strip conductor and a plurality of output strip conductors branching from the input strip conductor directly or via strip conductors of an impedance transformer, and One end of the input section strip conductor is an open end, and the input section strip conductor is connected directly or via the strip conductor of the impedance transformer to a branch section located approximately 1 A length away from the open end of the IJ tube conductor. , the plurality of output section strip conductors are formed into radial branches.

[Effect]

In the single force distributor of the present invention, one end of the input section strip conductor is an open end, and an impedance transformer is installed directly or at a branch section provided at a position approximately 1/2 length from the open end of the input section strip conductor. By branching multiple output strip conductors radially through the output line, power is distributed radially with a simple output line arrangement, shortening the line length of the output line and reducing power loss due to the line. .

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, (11, (21, (4) to (9),
and P1 to P5 are the same as in the conventional case, G (I is an open end provided at one end of the input section strip conductor (4), a
υ is a branch provided on the input strip conductor (4) at a position approximately 1/2 wavelength away from the open end 01.

Four quarter-wavelength transformers (9) are connected to the input line (7) at one branch αυ and are radially distributed from nine branches αυ. Each quarter-wavelength transformer (9) is connected to an output line (8) according to its type.

Thus, the branch αυ on the input strip conductor (4)
An output line (8) is formed in the normal direction of a circle centered at .

Further, the 1/4 wavelength transformer (9) is the same as in the conventional case.

The line width is determined so that the input impedance of each 1/4 wavelength transformer (9) connected in parallel when viewed from the branch part αυ to the output terminals P2 to P5 is equal to the characteristic impedance of the input line (7). ing.

Next, the operation will be explained.

When microwaves enter from input terminal P1, input line (
Since one end of 7) is an open end a1, the input line (7)
A standing wave is generated.

At this time, the branch part aυ located at a distance of approximately 1 A wavelength from the open end Ql becomes the voltage maximum point. For this reason, the input line (7)
The microwave inside is efficiently coupled and distributed to each output line (8) via a 1/4 wavelength transformer (9) connected to the branch part αυ and distributed radially, and taken out from output terminals P2 to P5. Ru.

What is the ratio of power distributed to each output terminal P2 to P5?

1/4 of each output terminal P2 to P5 side viewed from the branch αυ
The value corresponds to the input impedance ratio of the wavelength transformer (9).

Since the microwave is propagating as a standing wave in the input line (7), the input impedance of each 1/4 wavelength transformer (9) as seen from the 9-branch section aυ should be equal regardless of the direction of the 174-wavelength transformer. Equidistribution is obtained.

In addition, impedance matching seen from the input terminal P1 is obtained by the function of the 1/4 wavelength transformer (9), so that the microwave incident on the input terminal P1 is
It is distributed to P2 to P5 without returning.

FIG. 2 is a block diagram of a power divider according to a second embodiment of the present invention, in which a dielectric plate (2) is layered and bonded on a strip conductor of the same shape as in the first embodiment, and further on this dielectric plate (2). A ground conductor (1a) was bonded to the base to form a triplate line (200). The ground conductors (1) and (1a) and the dielectric plates (2) and (a) arranged from above and below have substantially the same shape and are stacked with a strip conductor in between to form an integral structure. One side invitation 4
A groove is formed in the body plate (1), and the strip conductor is embedded therein.

In addition to having the same operating principle and advantages as the first embodiment, the second embodiment does not radiate the microwaves propagating in the power divider into space, and the upper and lower ground conductors o1, (1
a) It has the advantage of being able to be shielded.

FIG. 3 shows a third embodiment of the invention and shows a suspended line (300). Two parallel ground conductors (
A dielectric substrate (2) is inserted between 1a) and (1b) in parallel with these ground conductors and supported by a spacer, and strips of the same shape as in the first embodiment are placed on both sides of the dielectric substrate (2). The conductor is glued. These strip conductors have approximately the same shape and are bonded to the dielectric substrate (2) so as to overlap each other, and these strip conductors are connected to the ground conductor (1a).
, (1b).

The embodiment of FIG. 3 has the same operating principle and advantages as the embodiment of FIG. 1 and the embodiment of FIG. Since the space between the lines is hollow, there is no dielectric loss, which has the advantage of reducing line transmission loss.

In the above embodiment, the case of a 4-divider was explained, but a 2-3 distribution, or 5 or more distribution may be used, and the same effects as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, in a power divider including a ground conductor and a strip conductor, one end of the input strip conductor is an open end, and approximately 1/2 Since a plurality of output section strip conductors are branched radially at branch sections two wavelengths apart, either directly or via the strip conductor of an impedance transformer, the power can be distributed radially with a simple arrangement of output lines.

This has the effect that the length of the output line can be shortened and low loss can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a power divider according to a first embodiment of the present invention, FIG. 2 is a block diagram showing a power divider according to a second embodiment of the present invention, with some parts missing, and FIG. is the third aspect of this invention.
Partly missing configuration diagram showing the power divider according to the embodiment, No. 4
The figure is a configuration diagram showing a conventional α force distributor. (1) is the ground conductor, (2) is the dielectric substrate, (4) is the input strip conductor, (5) is the output strip conductor, (6
) is the strip conductor of the 1/4 wavelength transformer, and Ql is the open end. (11) is a branch. In addition. In the figure. The same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] It comprises a flat ground conductor and a strip conductor arranged parallel to the ground conductor, and the strip conductor is connected to the input section strip conductor and from the input section strip conductor directly or through the strip conductor of the impedance transformer. In a power divider integrated with a plurality of branching output strip conductors, one end of the input strip conductor is an open end, and an impedance is connected directly to the branch at a position approximately 1/2 wavelength away from the open end. A power divider characterized in that a plurality of the output section strip conductors are provided radially through a strip conductor of a transformer.