JPS5810901A - Ring circuit - Google Patents

Abstract

PURPOSE:To realize power distribution over a wide zone, by providing 5 terminals on a ring line and connecting a matching terminator for the two terminals. CONSTITUTION:Terminals P1, P2, P3, P4 and P5 are provided in the interval of 1/6 of ring line length. When the length of one circumference is selected as 1.5 wavelength, a wave incident from the terminal P3 is divided to two at a point Q3 and propagates in the left and right directions. The two waves are added at points Q2 and Q4 because of inphase and cancelled at points Q1 and Q5 in opposite phase. When the characteristic impedance of the ring line is taken as 2<1/2> times the characteristic imprdance of the terminals P2-P4, the incident wave from the terminal P3 enters the ring line without reflection and is distributed to the terminals P2 and P4 with inphase and equal amplitude. Since the terminals P2 and P4 are disposed symmetrically to the terminal P3, the equal distribution can be made for other frequencies.

Description

[Detailed Description of the Invention] This invention is based on UHP? This relates to ring circuits commonly used in the L and microphone A-wave bands.

Unlike a two-branch line type coupler or a distributed coupling type directional coupler, a ring circuit is a coupler with in-phase distribution, so it can be used in a power feeding system such as an array antenna that requires in-phase distribution.

Ring circuits are mainly composed of strip lines and coaxial lines, and different distribution ratios can be obtained by changing the impedance of the 1 m line.
For convenience of explanation, an equally distributed ring circuit constructed of strip lines will be explained.

Figure 1 shows the inner conductor of a conventional ring circuit, where (1) is the ring line that closes at the eye, Pl
, P4 is a terminal, and Ql-Q4 is a point where terminals P1 to P4 branch from the ring line mountain.

The circumference of the terminals P1 to P4Fi, ring line 41)
They are provided on the ring line (1) at intervals of .

Next, the operation of this ring circuit will be briefly explained.

If the circumference of the ring line (1) is selected to be 1.5 wavelengths at vh and 1 frequency fo, the wave incident from @i child P2 is divided into two equal parts at point Q1, and the waves are divided into two parts, clockwise and counterclockwise, respectively. However, these two waves are in phase and additive A at points Q1 and Q4, and cancel each other out in opposite phases at point Q4. Therefore, output is obtained at terminal P1 and terminal P8, but output is obtained at terminal P4.
There is no output.

Characteristic impedance t of ring line (1) - terminal P1 ~
If you choose the characteristic impedance of P2 to be twice that,
Incoming tfI#'i from terminal P2 without reflection/ground line (
1) and is distributed to terminals P1 and Pl with the same phase and equal amplitude.

However, at frequencies other than one frequency fo.

Since the electrical length of the interval between the terminals P1 to P4 is different from that in the case of the frequency fo, the incident wave to the eA element P2 is not completely canceled out at the point Q4, and an output is also output to the terminal P4.

At this time, the terminal P4 has a different positional relationship with respect to the terminal P1 and the terminal Ps, so they have different effects. Therefore, the outputs to the terminals P* and Pz do not have equal amplitude and the two-phase relationship is not in phase.

Therefore, the conventional ring circuit has a drawback that the frequency band that can be distributed in the same phase and with nine equal amplitudes is narrow.

This invention aims to eliminate these drawbacks.

Five terminal metals are provided on the ring line 11), of which 02
A matched terminator is connected to two terminals.

The meat side will be explained in detail below.

The second part is an embodiment of the present invention, (l; is a ring line, +21. +31 is a matching terminator, +41H is an axis of symmetry.

pl~p5h terminal t Ql"QSh terminal terminal -1~Ps
This is the point where it branches from the jE97 ground line il+.

Terminal P! ~Ps are sequentially connected to the ring line (1) at intervals of -the circumference of the ring line (1). Terminal P1
Matched terminators 121 and 131 are connected to and Ps, respectively.

vh, if we choose the length of one circumference of the ring line to be 1.5 wavelengths at the center frequency fo, the wave from terminal P3 will be at point Q.
s bisects fL, moving in the clockwise and counterclockwise directions, respectively, but these two tfI are added in the same phase at points Q2 and Q4, and cancel each other out in opposite phases at the 9 points Ql and Qs. Therefore, outputs are obtained at the terminals P2 and P4, but no outputs are obtained at the terminals P1 and Ps. The characteristic impedance of the ring line is the characteristic impedance Zo of terminals P2 to P4.
If π times 2 is selected, the incident wave from the @child Ps enters the ring line (1) without reflection and is distributed to the terminals P2 and P4 with the same phase and 9 equal amplitudes.

Next, for frequencies other than one frequency fo, two points Q1 and a point Qs
, the terminals PI and Ps
There will also be output. but.

Since the ring circuit of the present invention has a symmetrical structure with respect to the axis of symmetry (4), even at frequencies other than one frequency fo, one equal-oscillation in-phase one force oscillation can be obtained between the terminal P2 and the terminal ptGcti.

In this ring circuit, the characteristic impedance of the terminal PIPg must be set to 2 in order to reflect the waves incident on the terminals Px and P4 in the opposite phase (terminal P1. Zo needs to choose.

3rd meat/fi, 0.0 in another embodiment of this invention. il
l~131. P1 to Ps are the same as the second prisoner, (5
) is the outer conductor. In the ring circuit of this embodiment, rectangular coaxial lines in which the inner conductor and the outer conductor (5) have a rectangular cross section are used as the terminals P1 to Pg.

In addition, the ring line fllFi connects both ends of two parallel rectangular coaxial lines with a circular coaxial line with a circular cross section *
a! I'll do it.

The ring circuit of this invention has an input terminal P3 and an output terminal Pz
, P4 are connected in opposite directions, making it suitable for connecting in multiple stages to configure a power multi-distributor.

Note that although the above description has been made regarding a ring circuit with equal distribution, the present invention is not limited to this and may be used in a ring circuit with unequal distribution. Furthermore, the lines constituting the ring circuit are not limited to strip lines and coaxial lines.

As described above, in the ring circuit according to the present invention, five terminals are provided in the ring portion, and matching terminations are connected to two of the terminals.

There is an advantage t5 that power can be distributed over a wide band with the same phase and an amplitude ratio of one foot.

[Brief explanation of the drawing]

Figure 1 shows the inner conductor of a conventional 977 circuit. @2 Figure is a diagram showing an inner conductor of an embodiment of the present invention. FIG. 3 is a partially omitted schematic diagram of another embodiment of the present invention. In the figure, the mountain is the ring line, +21. +3+1j matching terminator. P1 to Ps are terminals. In the figures, corresponding parts are indicated by the same reference numerals. Agent Shin Kuzuno −! 112m! 1

Claims (1)

[Scope of Claims] A first ring line provided on the ring line with an interval of - of the circumference of the upper distribution line and the ring line that closes itself at h.
with five terminals from the fifth. *FR is performed by a matching terminator connected to the first terminal and the fifth terminal; 77 circuit characterized in that the characteristic impedance of the terminal and the fifth terminal is five times the characteristic impedance of the ring line.