JPS59202A - Variable electric power distributor - Google Patents

Abstract

PURPOSE:To obtain a prescribed electric power distribution ratio, by accumulating a triplate line type branch coupler whose dielectric is air so as to use in common an external electric conductor, and setting the length of a connecting cable between two branch lines to prescribed length. CONSTITUTION:Branch couplers 2a, 2b consist of a triplate line structure constituted of external electric conductors 5a, 5b, an internal electric conductor 3a, external electric conductors 5b, 5c and an internal electric conductor 3b, respectively, and in this case, the external electric conductor 5b is used in common by two branch line couplers 2a, 2b. Air layers 4a, 4b correspond to a dielectric layer, thickness of the air layers 4a, 4b is compensated by a spacer 11, and the whole is constituted by being clamped with a clamping screw 10. Connectors 6a-6h fitted to the branch line coupler 2a are an input, an output, an unbalance component output, and a phase shifting cable connecting terminal, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a variable power divider used in communication, broadcasting, radar, etc. First, a conventional variable power divider of this type will be explained with reference to FIG. In the figure, (1) is a variable power divider, and (2) is a branch line Kagura.

(3) is a strip conductor, (4) Fi, dielectric plate, (5
) is a metal ground plate, (6) is a /fi connector, (7) is a u phase shifter, (8) is a non-reflective termination, and (9) is a drive circuit. This type of variable power divider is called Variable Power
It is called a Divider (abbreviated as V, P, D) and divides the input high frequency power into two, and the distribution ratio can be arbitrarily selected. Branch line couplers (2a) and (2b) are respectively) IJ tube conductor (8a), dielectric plate (4), metal ground plate (6), strip conductor (8b), dielectric plate (4), metal ground plate (5)
It is a micro-strip line type signal divider that consists of a 90° phase difference when high frequency power is supplied to one of the four terminals, and half of each terminal is applied to the other two terminals, if loss is ignored. A signal with 1 is output, and an unbalanced component is output from the remaining l terminal. The phase shifters (7a) and (?b) are, for example, bin diode type phase shifters, and the drive circuit (9
) is driven by Now, connect the l to connector (6a).
Suppose that a certain amount of power is supplied. −ψ to phase shifter r7a)
If a phase shift amount of c is given, the connector (6h) has c
The output ns'ψ is also output to the connector (6a).
An output of n″ψ can be obtained. Therefore, phase shift amount ψ
If it is selected so as to obtain a predetermined power distribution ratio, it will function as a variable power divider. Note that the non-reflection termination (8) absorbs the unbalanced side component.

As explained above, conventional variable power dividers can change the power distribution ratio between the two output terminals, but they have drawbacks such as large losses and large 1gI outputs. , D in combination, it could not be said to be electrically or economically effective.

In order to eliminate these drawbacks, this invention stacks tri-plate line type branch line couplers using air as a dielectric so that they share the outer conductor, and increases the length of the connection cable between two branch lines to a predetermined length. By making it.

This has been improved to obtain a predetermined power distribution ratio, and will be explained in detail below using the following two drawings.

Figure 2 is an assembly diagram showing an embodiment of the variable power divider of the present invention. In Figure 1, (1) is the variable power divider, (2) is the branch line coupler, (3) is the inner conductor, (4 ) is the air layer, (5) is the outer conductor, and (6) is the connector.

(7) is a phase shifter cable, (8) tIi non-reflection termination,
(10 is a tightening screw, 09 is a spacer. Branch line couplers (2a) and (2b) are respectively,
Outer conductor (5a), (5h), inner conductor (aa)
, outer conductor r5h), (5c), and inner conductor r8h). In this case, outer conductor r5h) connects two branch line couplers (2a
), (2b). Air layer (4a), (4
h) corresponds to the dielectric layer, and the spacer (b)
The thickness of (4a) and (4b) is compensated for, and the whole is tightened with a tightening screw O (I).A connector (6a) attached to a branch line coupler (2a),
(6h), (6c), (6d), the connector also attached to the branch line coupler (2b) (
6e), (6F), (6g), and (6h) are input, output, unbalanced component output, and phase shift cable connection terminals, respectively. now.

Connector (6a) is used as an input terminal, connector r6c)-
(6e) Phase shifter cable (7
In case a), a phase shifter cable (7h) having a phase shift of 1 ψ is connected between the connectors (6d) and (6r).

If loss is ignored, an output of cos"ψ can be obtained from the connector (6g), and an output of sin"ψ can be obtained from the connector (6h). Therefore, connector' (6g), (6h
) Phase shift cable (7a) corresponding to the output taken out from
, (7b) in various numbers, it is possible to provide a function as a variable power divider. The non-reflection termination (8) is for absorbing unbalanced component output,
It is attached to the connector (6b).

In addition, in Figure 9, one V, P,
Example D was shown.

Similar effects of the invention can be obtained even when using a branch line coupler composed of rectangular inner conductors, or when using a power supply network composed of a plurality of V, P, and D stacked. can get.

As explained above, the variable power divider according to the present invention can achieve low loss and low cost by using a triplate line type branch line coupler configured to eliminate dielectric loss and share the outer conductor. By setting the length of the connecting cable between the branch line and the coupler to a predetermined length, a predetermined distribution ratio can be obtained as the output.

[Brief explanation of drawings]

FIG. 1 is an external view illustrating an embodiment of a conventional variable power divider, and FIG. 2 is an assembly diagram illustrating an embodiment of the variable power divider of the present invention. In the figure, (1) is a variable power divider, (2) is a branch line coupler, (3) TI inner conductor or strip conductor, (431' is a rusted conductor plate, (6) is an outer conductor or metal ground plate, (6) is the connector, (7) is the phase shifter or phase shift cable, (8) is the non-reflective termination, (9) is the drive circuit, 00 is the tightening screw, and ■ is the spacer. , Identical or equivalent parts are indicated with the same reference numeral. Agent Shin Kuzuno - Lllllffi iz Sen

Claims (1)

[Claims] A variable power divider that divides high-frequency power fed to an input end into two parts at a required distribution ratio and can arbitrarily change the distribution ratio. A metal plate bent to the width of is used as one side plate for attaching the outer conductor and connector of the tri-plate line, and the inner conductor is placed on the metal plate, and two parts are stacked. It consists of two branch line couplers with a structure in which a metal tab is attached to the above-mentioned parts on the top stage and the whole thing is tightened with screws, two phase shifting high frequency cables, and one non-reflection termination. A variable power divider featuring: