JPH02224501A - Power distributer - Google Patents

Abstract

PURPOSE:To obtain a power distributer whose in-phase and unequal distribution is made attainable and whose impedance of input and output terminals is balanced by varying the characteristic admittance of 6 1/4 wavelength lines and 5 terminals in specific function. CONSTITUTION:A wave made incident from an input terminal 7 is distributed into two at a connecting point Q3 and summed at a point Q6 in a ring circuit comprising 1/4 wavelength lines 1-6 and terminals 7-11, no current flows and the input terminal is regarded as an open terminal. Assume that the characteristic admittance of lines 2-5 be Y2-Y5, the characteristic of the input terminal 7, output terminals 8-9 and isolation terminals 10-11 be Y7, Y8-Y9, Y10-Y11 respectively, and they be varied in a prescribed relation shown in equation I (m/n is distribution ratio). Then, the power distributer in which in-phase unequal distribution is attained and whose input and output terminal impedance is matched is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power divider often used in the UHF band and microwave band.

[Conventional technology]

Conventionally, there has been a device of this type as shown in Fig. 3. This figure is shown in Japanese Unexamined Patent Publication No. 511-10901 and is as follows. In figure 1, (7) is an input terminal, (8
) j191 is the output terminal, 111 and 11υ are isolation terminals, a'a and us are matching terminators, (
14 is the ring track.

a! 9 is the axis of symmetry, Ql, Q5 is the point where the eye region terminals a, al branch from the ring line α◆, Q2,
Q4 is the point where the output terminals +81 and 191 branch from the ring line I, and Q3 is the point where the ring line (I41 and the input terminal (7)
) is the point where it diverges.

Each of the above terminals ill, (81, (71, 191, al
1 are sequentially connected to the ring line I at intervals of 176 times the circumference of the ring line IO. For terminal α1 and terminal αυ,
Matched terminator α3. Ql is connected.

Now, if the length of one circumference of the ring S path α is selected to be 1.5 wavelengths at the center frequency fO, the nine waves incident from the input terminal (7) will be divided into two equal parts at the point Q3, clockwise and counterclockwise, respectively. These two waves move in the direction of point Q2 and point Q4.
Then, they are added in the same phase, and at one point Q1 and Q5, they are in opposite phase and cancel each other out. Therefore, the output is changed to the output terminal (8) and the output terminal (9), but no output is output to the isolation terminal a1 and the cover. Ring line 114 (D characteristic admittance is 1 of characteristic admittance YQ of each terminal (7) to (9)
/C is selected twice.

The incident wave from the terminal (7) enters the ring line I without reflection and is distributed to the output terminal (8) and the output terminal (9) with the same phase and 9 equal amplitudes.

Next, at frequencies other than 2 frequencies fo, the input terminal (7)
The waves incident from the point Q1 and Q5 are no longer completely canceled out, and outputs also appear at the isolation terminals α and I. However, since the ring line I shown in this figure has a symmetrical structure with respect to the axis of symmetry aS, even at frequencies other than the two frequencies fO, the output terminal (8
) and the output terminal (9) provide in-phase and nine equal amplitude outputs.

Note that in this ring circuit, the output terminal (8).

Matching terminator 0 connected to isolation terminals an and am, which does not reflect waves incident on the output terminal (9) in reverse phase.
3.

The ninth terminal that absorbs into the circle is the isolation terminal α.

It is necessary to choose the characteristic admittance of fiυ to be YO/2.

[Problem to be solved by the invention]

As described above, a method of in-phase uniform distribution using such a ring circuit has been proposed in the past.

A specific method for obtaining an arbitrary distribution ratio is not shown.

There was a problem that an arbitrary distribution ratio could not be obtained.

The present invention was made in order to solve the above-mentioned problems, and aims to provide a power divider in which in-phase and unequal distribution can be obtained and impedance matching between input and output terminals can be achieved.

[Means to solve the problem]

The power divider according to the present invention sequentially connects six quarter-wavelength lines in a ring shape, and determines the characteristic admittance value of five terminals branched from each connection point of the 174-wavelength line and the characteristic of the 174-wavelength line. The admittance value is changed in a fixed relationship.

[Effect]

In this invention, six 1/2
By changing the characteristic admittance values of the four-wavelength line and five terminals in a fixed relationship.

In-phase and unequal distribution can be obtained, and impedance matching of input and output terminals can be achieved.

[Embodiments of the invention]

FIG. 1 shows an embodiment of the present invention. 1st
In the figure, (l] to (6) are the first to sixth 174-wavelength lines, (7) is the input terminal, (81, +91 is the output terminal, 01, al is the isolation terminal, αa,
t+3 is a matched terminator, Ql to Q6 are 1/4 wavelength lines 11
The connection points of 1 to (6), Yl to Y6 are 174 wavelength lines (1
) to (6), Y7 is the input terminal (7)
Characteristic admittance of, Y8 and Y9 are output terminals (8)
, +9), and Ylo and Yll are the characteristic admittances of the isolation terminals an and al.

The 174 wavelength lines (11 to (6) are connected sequentially in an IJ ring shape.The input terminal (7) is the connection between the third 174 wavelength line (3) and the fourth 1/4 wavelength line (4). The output terminal (81, 19) is provided at the point Q3.
It is provided at the connection point Q2° between the 74-wavelength line (2) and the third 1/4-wavelength line (3) and at the connection point Q4 between the fourth 174-wavelength line (4) and the fifth 174-wavelength line (5). ing.

Itlesion terminal +II, tll is the connection point Ql of the first 174-wavelength line) 1) and the second quarter-wavelength line (2), and the connection point Ql of the fifth quarter-wavelength line (5) and the sixth quarter-wavelength line (5).
It is provided at the connection point Q5 of the 174-wavelength line (6). Isolation terminals αO and aυ are each connected to a matching terminator [+3].

0 is connected.

Next, the operation will be explained.

First, the operation of 9 distribution will be explained. The wave incident from the input terminal (7) is divided into two at one point Q3.

At point Q6, they are added in phase. Therefore 1 point.

6, no current flows and can be considered as an open end. Therefore, the point is 1/2 wavelength away from the 9th point Q6. 2 and point Q
Admittance seen from 4 to 1 point Q6 is 0, 1/4
The wavelength lines (1), +21, +51, and (6) can be considered as open and removed. If the distribution ratio is m to n (m and n are positive real numbers), then Y
3 / Y 4 = Y 2 / Y 5 m, m/
It becomes n. Also.

Impedance matching condition G) Y3/Y7-m15-
.

ys, "y T-m, Y4/Y7-n/r
, Y9/Y7-n. Furthermore, from the isolation condition, Y 2 / Y 8 = Y I Q / Y
8- Y5 / Y9 = Y11 / Y
The score became 9-1. The above relational expressions can be summarized as follows.

Y2-mY7 l1lY 3-
(m / 5 τ) Y 7 (21Y 4
= (n / 5 pieces]) Y 7 (3) y
5-n Y 7
(4JY 8-m Y 7
(5)Y9-nY7
(61YIO-mY7
(71Y11=nY7
(8) Here, the admittance Yin1 seen from point Q3 to point Q2 and the admittance Yin2 seen from point Q3 to point Q4 are the admittance Y8 or Y9 connected to the end of the 1/4 wavelength transformer of the characteristic admittance Y3 or Y4, respectively. Since it is equivalent to
inl −Y3 /Y8 jYin2−Y4 /ys.

Therefore, equations (2), (3), (5), and (6) become as follows: Yinl-(m/(m+n))y7 +9)y
in2-(n/(m+n))y7 +lfl+
91, The wave incident on the H-type input terminal (7) is
It can be seen that the output terminals +81, +9) are distributed m to n in the same phase, and the impedance matching of the input terminals is also achieved.

Next, we will explain how Q isolation is achieved between the output terminals (81 and +91).For this explanation, we will explain the even mode operation in which waves enter the output terminals (81 and 191 in the same phase) and the wave in the opposite phase. We will consider the operation separately in the odd mode where is incident, and later consider these operations in combination.

First, the even mode operation will be explained. In the case of even mode, 1/
4-wavelength line fi+ , +21 , +51 , (6
1 can be considered by removing the opening. At this time, impedance matching of the output terminals (81, 19) is also achieved.

Next, the operation in odd mode will be explained. In the case of the odd mode, waves are incident on the output terminals (8), +9) in opposite phases, so at point 9 Q3 and point q6, the waves cancel each other out in opposite phases, and the voltage becomes O. Therefore, from point Q2 and point q4, which are 1/4 wavelength away from one point Q3.

Admittance looking at point Q3 and 1/4 from point Q6
The admittance seen from point Q1 and point Q5, which are 9 points apart from each other by a wave member, is 0. therefore.

The 1/4 wavelength lines H1, +31, (41, +61 can be considered as open and removed. At this time, they remain without being removed.

The characteristic admittance of the 1/4 wavelength line (2), output terminal (8), and isolation terminal decoy is m y y , 1/
The characteristic admittance of the four-wavelength line (5), the output terminal (9), and the isolation terminal riυ is nY7, so the output terminal (8).

It can be seen that the impedance matching (9) is achieved.

When even-mode operation and odd-mode operation are superimposed, the waves incident on one output terminal are added in the same phase, and the waves incident on the other output terminal are in opposite phase and cancel each other out. When a wave is incident on .

A wave comes out to the other output terminal, output terminal (8) j (
9) It can be seen that the isolation between

At this time, impedance matching of the output terminal is also achieved.

FIG. 2 shows an example of calculating the characteristics in the case of m-+33, n-0, and 67. In the figure, (7) to Q3 are the same as shown in FIG. (14, Q'9 is the output terminal (8).

(9) and 1/ to match the line with characteristic admittance Y7.
It is a 4 wavelength transformer. σe and αη are output terminals of the quarter wavelength transformer. Figure 10% rainbow ratio band.

It can be seen that when the input V8WR1, OIt or less, the isolation between the output terminals is -4Q, 0 (1B or less), the frequency dependence of the 9-distribution characteristic is expressed, and good characteristics are obtained.

〔Effect of the invention〕

As described above, according to the present invention, the first to sixth 174-wavelength lines sequentially connected in a ring shape, and the third and fourth 174-wavelength lines connected sequentially in a ring shape.
A nine-input terminal branched from the connection point of the 74-wavelength line, a first output terminal branched from the connection point of the second and third 174-wavelength lines, and a branched from the connection point of the fourth and fifth 174-wavelength lines. a second output terminal branched from the connection point of the first and second 174-wavelength lines, and a second isolation terminal branched from the connection point of the fifth and sixth 174-wavelength lines. In the specific power divider, the characteristic admittance of the second to fifth 174-wavelength lines, the characteristic admittance of the input terminal, the characteristic admittance of the output terminal, and the characteristic admittance of the isolation terminal are changed in a fixed relationship This has the effect of obtaining an in-phase, unequal distribution power divider.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an inner conductor according to an embodiment of the present invention. FIG. 2 is a characteristic diagram showing the operating characteristics of the embodiment, and FIG. 3 is a diagram showing the inner conductor of a conventional power divider. In the figure, (l) to (6) are 174-wavelength lines, and (7) is an input terminal. (8) , ! 9) is the output terminal, (II, lυ is the isolation terminal, as, as is the matching termination 5
．． (14), Q! 9 is a 174 wavelength transformer, (II9.
Qη is the output terminal of the quarter wavelength transformer. In addition, in FIG. 1, the same or corresponding parts are given the same reference numerals.

Claims (1)

[Claims] The first to sixth quarter-wavelength lines are sequentially connected in a ring shape, and an input terminal branched from the connection point of the third and fourth quarter-wavelength lines and the second and a first output terminal branched from the connection point of the fourth and third 1/4 wavelength lines, and the fourth and fifth first output terminals.
a second output terminal branched from the connection point of the /4 wavelength line;
A first isolation terminal branched from the connection point of the first and second 1/4 wavelength lines, and a first isolation terminal branched from the connection point of the first and second 1/4 wavelength lines;
and a second isolation terminal branched from the connection point of the four-wavelength line, with characteristic admittances Y2 to Y5 of the second to fifth quarter-wavelength lines, characteristic admittance Y7 of the input terminal, and the above output. Terminal characteristic admittance Y8
, Y9, and characteristic admittances Y10 and Y11 of the isolation terminals have the following relationship. Y2-mY7 (1) Y3={m/√(m+n)}Y7 (2) Y4={n/√(m+n)}Y7 (3) Y5=nY7 (4) Y8=mY7 (5) Y9=nY7 ( 6) Y10=mY7 (7) Y11=nY7 (8) However, m and n are positive real numbers, and the distribution ratio of the power divider is m:n.