JPS5941606Y2 - variable power divider - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a variable power divider that is mainly used in the microwave band to the millimeter wave band and is capable of dividing input power into two output terminals at an arbitrary ratio.

Recently, phased array antennas have been frequently used, which can achieve a desired directivity or change the directivity by changing the excitation amplitude and excitation phase of several radiating elements.

In this case, each radiating element receives electromagnetic wave power (hereinafter referred to as "power").

) is needed in an arbitrary ratio.

Conventional variable power dividers using waveguides in the microwave band or millimeter wave band include those using magic T, bend, etc.

However, such conventional variable power dividers have drawbacks in that they cannot necessarily meet the demands for smaller size, lighter weight, and higher reliability.

The present invention improves this point by making it smaller, lighter, and lighter.
The purpose of the present invention is to provide a variable power divider that can achieve high reliability and can be applied as a feeder circuit element for radar and phased array antennas mounted on satellite towers.

The present invention consists of a three-terminal power divider that divides the short side of a rectangular waveguide into two, and two variable phase shifters connected to each of the two short sides of this power divider. and one branch guide coupler connected to the output end of the variable phase shifter.

This will be explained in detail based on the drawings.

FIG. 1 is a structural diagram of a conventional example.

1 is a magic T, 2 is an H branch terminal of this magic T1, and 3 is an E branch terminal of this magic T1.

This magic T1 is connected to variable transfer devices 6, 6' via H-bends 5, 5'.

This variable phase shifter6. C is connected to the short slot hybrid 7 via H bends 5, 5'.

8 and 9 are output terminals of the short slot hybrid.

With this structure, the power of the input wave input from the H branch terminal 2 is divided into two by the magic T1.

Each of the divided signal waves is transferred to a variable transfer device 6,
6', H-bends 5, 5', are combined at short slot hybrid 7, and output to output terminals 8, 9.

At this time, by appropriately varying the amount of phase shift of the variable transfer devices 6, 6', the input power from the H branch terminal 2 can be distributed to the output terminals 8.9 at an arbitrary ratio.

The reason why the H branch of Magic T1 is used as the input terminal is that the relative phase of the output waves of output terminals 8 and 9 in this case is determined by the variable phase shifter 6, no matter how the phase shift amount of the variable phase shifter 6 is set. This is because they will be the same.

It is desirable to always keep the phases of the output terminals 8 and 9 equal in this way from the viewpoint of designing the phase characteristics of the entire phased array power supply system.

In this example, in addition to magic T1, H bend 5, 5'
, a conventional example circuit system using the short slot hybrid 7 has been described.

However, using E bend instead of H bend 5°5',
The same applies to the conventional circuit system that uses a branch guide coupler instead of the short slot hybrid 7.

Since these variable power dividers use a magic T1 bend or the like, they have disadvantages such as (1) large size, (2) heavy weight, and (3) increased number of parts.

Due to these drawbacks, it is inconvenient to use it as a variable power divider for radars or satellites, which require small size, light weight, high reliability, etc.

FIG. 2 is a cross-sectional structural diagram of the main part of the present invention-an embodiment.

Compared to the conventional structure explained in Figure 1, the feature is that it uses a three-terminal power divider that divides the short side (E wall surface) of the rectangular waveguide into two, eliminating the need for magic T and bends. There is.

3 is a left side view of FIG. 2, and FIG. 4 is a right side view of FIG. 2.

In other words, the short side (E wall surface) of the rectangular waveguide is divided into 3 parts.
The structure is characterized in that variable phase shifters 6 and 6' are connected to the terminal power divider 11, respectively, and one branch guide coupler 12 is connected to the variable phase shifter 6.6'.

13 is an input terminal of the power divider 11, and 14 and 15 are output terminals of the branch guide coupler 12.

Arrow 16 indicates the polarization direction of the input wave.

With this structure, when a signal wave with polarization in the direction of arrow 16 is input from the input terminal 13, its power is divided into two vertically by the power divider 11, and the power is divided into two by the power divider 11, and the power is divided into two by the variable phase shifter 6.
．． It passes through v and is again combined by branch guide coupler 12 and output to output terminals 14 and 15.

The power ratio of the output can be changed arbitrarily by variable phase shifters 6, 6'.

At this time, the phases of the signal waves divided vertically into two by the power divider 11 are in phase with each other, so the output terminal 1
The signal waves outputted at 4.15 are also in phase with each other regardless of the amount of phase shift of the variable phase shifters 6 and 6'.

Here, when comparing the above-mentioned embodiment of the present invention with the conventional variable power divider illustrated in FIG.
1 has a simpler structure than Magic T1, and can be made smaller and lighter.

Further, since the branch guide coupler 12 can achieve a large coupling per unit length, it can be made smaller than the short slot vibe knot 1.

Furthermore, since no bends are used, the variable power divider can be made smaller and lighter.

In the above example, a three-terminal power divider with E-plane bending is used, which divides the short side of the rectangular waveguide into two. Similar implementation is possible using a 2-divider.

As explained above, according to the present invention, a three-terminal power divider in which the short side of a lightweight rectangular waveguide is divided into two is used without using a heavy magic tee, so the structure of a variable power divider is can be made simple, compact and lightweight.

Furthermore, since the number of parts can be reduced, accuracy can be improved.

Moreover, since the two divided output waves are in phase with each other, it has an excellent effect especially when applied as a feeder circuit element for radars and phased array antennas mounted on satellite towers, which need to be small and lightweight. .

[Brief explanation of drawings]

FIG. 1 is a structural diagram of a conventional example. FIG. 2 is a cross-sectional structural diagram of the main part of the present invention - an embodiment. Figure 3 is a left side view of Figure 2. Figure 4 is a right side view of Figure 2. 1...Magic T12...H branch terminal, 3...EE branch terminal, 5.5'...
H-bend, 6, 6'...variable phase shifter, 7...
...Short slot hybrid, 8.9,14,
15... Output terminal, 11... Power 2 divider, 12... Branch combiner, 13...
...Input terminal, 16...Arrow.

Claims (1)

[Scope of utility model registration request] A three-terminal power divider that divides the short side of the rectangular waveguide into two, two variable phase shifters connected to each of the two short sides of this power divider, and this variable transfer. a branch guide coupler connected to the output end of the variable power divider.