JPH0677710A - Variable quarternary phase shift distributor - Google Patents

Abstract

PURPOSE:To obtain a simple and highly reliable structure, to perform quarternary distribution of electric power, and to continuously vary phase differences of the distributed signals by coupling strip conductors through arcuate conductors. CONSTITUTION:The high-frequency signal from the input terminal A of an input-side strip conductor 1 is divided into two at the coupling part for an arcuate conductor 11 and coupled with the arcuate slide conductor 14 of a rotator 7 through an insulator plate 6. Then the signals are passed through infinite conductors 17 and 18 and further divided into two at coupling parts for slide conductors 15 and 16, and they are coupled with two output-side strip conductors 2 and 3 of a stator 5 through the insulator plate 6 to obtain outputs from respective four end parts of the strip conductors 15 and 16. The phase differences of those four outputs are obtained in proportional to the angle of rotation of the rotor 7. Consequently, the distributed signals have the phase difference at equal intervals and the phase differences can continuously be varied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of distributing power of a high frequency signal into four parts, and the phase difference of the distributed signals is -3.
The present invention relates to a variable phase shifter / four divider which appears at regular intervals of δ, −δ, δ, 3δ and can continuously change the phase difference δ. Using this variable phase shifter / divider, it is possible to configure a variable phase power supply device capable of continuously changing the beam tilt angle (directivity) of the array antenna.

[0002]

2. Description of the Related Art Conventionally, in order to change the beam tilt angle of an array antenna, the length of a cable for feeding a high frequency signal distributed by a power distributor to each array antenna element is changed so that the array antenna is supplied with power. The taper of the phase distribution of the high frequency current is changed.

A cable having the same length and a phase shifter inserted between a power distributor and an array antenna is also used in a phased array antenna or the like.

[0004]

When it is attempted to change the amount of phase shift by changing the length of the cable, for example, when the power feeding device is installed outdoors, the waterproof treatment section is removed and the cable is removed from the connector. , Had to replace the cable with a different length or cut the cable itself to shorten it, and then perform the laborious work of mounting the connector and waterproofing again.

Further, in the power feeding device using the phase shifter,
If the phase is changed continuously or at a fine pitch, a large number of switches and cables are required, the size becomes large and the cost becomes high. Moreover, since the switch has a mechanical contact, it may cause contact failure due to aging, which causes intermodulation and noise.

Therefore, an object of the present invention is to solve the above-mentioned technical problems and to provide a power supply of 4 by a simple and highly reliable structure.
An object of the present invention is to provide a variable phase shifter / four divider which can perform distribution and can continuously change the phase difference of distributed signals.

[0007]

A variable phase shift four-distributor according to claim 1 for achieving the above object comprises a stator and a rotor, wherein the stator is (a). It is composed of an arcuate conductor having a radius a with a point O as a center and a finite length conductor extending from the center of the arc to the outside or inside of the arc along a normal line passing through the center. An input side strip conductor having an end of the long conductor as an input end; and (b) a radius a of an arc of the input side strip conductor which is arranged line-symmetrically with respect to the normal line and whose center is the one point O. It has arcs with a small radius b, and two output side strip conductors with both ends of each arc as output ends are arranged on the substrate. The rotor is (c) centered on one point O '. A semi-circular arc-shaped first strip conductor having a radius a
(d) Radius b is arranged symmetrically with respect to the normal line passing through the central portion of the arc of the first strip conductor and has a point O ′ as the center.
Arc-shaped second and third strip conductors, and (e) two finite length conductors extending in the center direction from both ends of the first strip conductor and intersecting the second and third strip conductors It is formed so that the one point O and the one point O ′ are aligned with each other, and the rotor is rotatable while an insulator is interposed between the stator and the rotor.

[0008]

According to the structure of the first aspect, the high-frequency signal input from the input end of the input side strip conductor is distributed to the arc-shaped conductor, and the first strip conductor of the rotor is interposed via the insulator. Be combined with. Then, from both ends of the first strip conductor are distributed in both directions of the second and third strip conductors through the finite length conductors respectively, and through the insulator,
Since the output ends of the two output-side strip conductors of the stator are reached, the power can be distributed in four.

When the rotor is rotated, the distance from the input end of the input side strip conductor to each output end of the two output side strip conductors changes at equal intervals, and the distance difference is proportional to the rotation angle. To do. Therefore, the phase difference of the distributed signals can be made equal, and the phase difference can be continuously changed.

[0010]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 1 is an exploded perspective view of a variable phase shifter 4 divider according to an embodiment. The variable phase shifter 4 has a stator 5 in which an input side strip conductor 1 and two output side strip conductors 2 and 3 are arranged on a printed circuit board 4, and an insulator plate 6 is provided on the stator 5. And a rotor 7 that slides through.

The input-side strip conductor 1 of the stator 5 comprises an arc-shaped conductor 11 and a finite-length conductor 12 connected to the conductor 11 at the center of the arc and extending in the normal direction. The end of the conductor 12 is the input end A. The finite-length conductor 12 has some inductance and resonates with the capacitance of the insulator plate 6 for impedance matching.

The output side strip conductors 2 and 3 have a radius b which is approximately half the radius a of the arc of the input side strip conductor 1.
Is an arc-shaped conductor having a line shape and is arranged line-symmetrically with respect to the normal line X along the finite-length conductor 12. The arc of the input side strip conductor 1 and the output side strip conductor 2,
The arc of 3 shares the center O. Further, both ends of each arc of the output side strip conductors 2 and 3 are output ends B,
It is C, D, E.

Finite length conductor 12 of input side strip conductor 1
Has a width selected so that the characteristic impedance is 50Ω, and the arc-shaped conductor 11 has a characteristic impedance of 100.
The width is chosen to be Ω. Therefore, impedance matching can be achieved in the arrangement of the embodiment in which the arc-shaped conductors 11 are connected in parallel to the left and right of the finite-length conductor 12. The widths of the output side strip conductors 2 and 3 are selected so that the characteristic impedance is 200Ω.

On the other hand, the rotor 7 is composed of a high-dielectric-constant insulator plate 6 made of a general high-frequency electric wire insulating material such as polyfluorinated ethylene, an arc-shaped first sliding conductor 14 having a radius a, and a radius. b arc-shaped second and third sliding conductors 15 and 16 and a central portion of the second and third sliding conductors 15 and 16 extending in the normal direction from both ends of the first sliding conductor 14. And two finite conductors 1 connected to these second and third sliding conductors 15 and 16.
7 and 18 are arranged, and the first sliding conductor 14 and the second and third sliding conductors 15 and 16 share the center O'of an arc.

The center O of the arc of the strip conductor of the stator 5 and the center O'of the arc of the rotor 7 coincide with each other,
The rotor 7 is rotatable about this center. An arc-shaped first sliding conductor 14 and a finite length conductor 17,
The width of 18 is selected so that the characteristic impedance is 100Ω, and the second and third arcuate sliding conductors 15 and 16 are formed.
Has a width selected so that the characteristic impedance is 200Ω. Therefore, impedance matching can be obtained in the arrangement of the embodiment in which the arc-shaped conductors 15 and 16 are connected to the left and right to the finite-length conductors 17 and 18, respectively.

According to the above-mentioned structure, the high frequency signal input from the input end A of the input side strip conductor 1 is divided into two parts at the joint with the arc-shaped conductor 11, and the rotor 7 via the insulator plate 6. Is connected to the arc-shaped first sliding conductor 14. Then, it is bisected again at the joint with the second and third sliding conductors 15 and 16 through the finite length conductors 17 and 18. Further, they are respectively coupled to the two output side strip conductors 2 and 3 of the stator 5 through the insulator plate 6 and taken out from the output ends B, C, D and E (see FIG. 2).

When the rotor 7 is rotated by the rotation angle θ (see FIG. 3), from the input end A of the input side strip conductor 1 to the output ends B, C, D and E of the arc-shaped conductors 15 and 16. The distances are L- (3/2) ΔL, L- (1/2) ΔL and L +, respectively.
(1/2) ΔL, L + (3/2) ΔL. Here, L is the distance from the input end A to the output ends B, C, D, and E when the rotation angle θ = 0, and ΔL = aθ. However, a = 2b. Therefore, the outputs appearing at the output terminals B, C, D, and E have a certain difference, and the difference appears in proportion to the rotation angle θ of the rotor 7.

As a result, phase differences appear in the distributed signals at equal intervals, and the phase differences can be continuously changed.
Next, the impedance matching method will be described. The impedance of the input terminal A of the variable phase shift quad divider is 50
Ω, impedance of output terminals B, C, D, E is 200Ω
(See FIG. 4), but the input terminal A, the output terminals B, C,
If D and E are also desired to match 50Ω, it is necessary to provide the strip conductor with a quarter wavelength impedance transformer. Therefore, as shown in FIG.
It is preferable to set the characteristic impedance of the first sliding conductor 14 to 25Ω, and to provide a quarter wavelength impedance transformer of √ (50 × 12.5) Ω in the middle of the finite length conductor 12. This makes it possible to compensate for the capacitance that the strip conductor has with the ground and to achieve impedance matching.
The loss of distribution can be prevented. Further, as shown in FIG. 6, the characteristic impedance of the arc-shaped conductor 11 is 100Ω.
And √ (100 × 25) in the middle of the first sliding conductor 14.
A quarter wavelength impedance transformer of Ω may be provided. Further, as shown in FIG. 7, quarter wave impedance transformers of √ (200 × 50) Ω may be provided in the middle of the output side strip conductors 2 and 3, respectively.

[0019]

As described above, the variable phase shifter 4 according to claim 1 is as described above.
According to the distributor, the phase of the output high frequency signal can be tapered and the phase difference can be continuously changed while the power 4 of the input high frequency signal is distributed. Thereby, the beam tilt angle of the linear antenna array can be continuously changed.

Also, since the strip conductor of the stator and the strip conductor of the rotor slide with the insulator interposed therebetween, noise is generated by the sliding, noise is generated due to poor contact between the conductors due to aging, and mutual noise occurs. It is possible to prevent the occurrence of modulation. Further, since the variable phase shifter 4 distributor can be configured by using a strip line or the like, it is possible to reduce the size and weight,
And manufacturing becomes easy.

Furthermore, since the four-power distributor and the phase shifter are integrally formed, the number of parts is small, the reliability is high, and the device can be made compact. Therefore, it is extremely effective when used as an antenna power feeding device when it is necessary to change the service area at any time, such as an antenna of a mobile communication base station.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a variable phase shifter 4 divider according to an embodiment.

FIG. 2 is a circuit diagram of a variable phase shift quad divider.

FIG. 3 is a circuit diagram when the rotor is rotated by an angle θ.

FIG. 4 is a diagram showing a characteristic impedance of each conductor of the variable phase shifter / distributor.

FIG. 5 is a circuit diagram of a variable phase shift quad divider in which impedance on the output side is matched by using an impedance transformer.

FIG. 6 is a circuit diagram of a variable phase shift quad divider in which impedance on the output side is matched by using an impedance transformer.

FIG. 7 is a circuit diagram of a variable phase shifter / quadruprator in which impedance on the output side is matched by using an impedance transformer.

[Explanation of symbols]

 1 Input-side strip conductor 2 Output-side strip conductor 3 Output-side strip conductor 4 Substrate 5 Stator 6 Insulator 7 Rotor 11 Arc-shaped conductor 12 Finite length conductor 14 First strip conductor 15, 16 Second, third Strip conductor 17, 18 Finite length conductor A Input end B, C, D, E Output end

Claims (1)

[Claims] 1. A variable phase-shifting 4-distributor comprising a stator and a rotor, wherein the stator is an arcuate conductor having a radius a with a point O as a center, and a normal line from the center of the arc. An input side strip conductor having an end of the finite length conductor as an input end, and a finite length conductor extending toward the outside or the inside of an arc along the On the substrate, there are two output-side strip conductors having an arc with a radius b smaller than the radius a of the input-side strip conductor centering on a point O, with both ends of each arc being output ends. The rotor is arranged such that the rotor is a semi-circular arc-shaped first strip conductor with a radius a centered at a point O ′ and a line with respect to a normal line passing through the center of the arc of the first strip conductor. Arranged symmetrically, with an arc-shaped first point O'as a center and radius b The second and third strip conductors and the two finite-length conductors extending in the center direction from both ends of the first strip conductor and intersecting with the second and third strip conductors are integrally formed. A variable phase-shifting four-distributor, characterized in that one point O and one point O ′ are made coincident with each other and the rotor is rotatable while an insulator is interposed between the stator and the rotor.