JPS6148202A - Microwave power distributor - Google Patents

Abstract

PURPOSE:To decrease the lateral width to half of a conventional width by utilizing a waveguide type power distributor distributing equally an incident wave into the direction of an electric field to form a microwave power distributor. CONSTITUTION:A 3db power distributor 14 consists a conductor plate 18 having a plane vertical to an electric field, a hole 19 provided to the conductor plate 18 and a radio wave absorbing plate 20 provided at both sides of the hole 19. Then an electromagnetic wave of the TE10 mode is distributed equally in the direction of the electric field (directions in solid lines and broken lines) by the conductor plate 18 of the distributor 14. The electromagnetic wave distributed equally is fed respectively to phase shifters 15, 16 stacked in the direction of the electric field and the phase is shifted. The electromagnetic wave subjected to phase shift is fed to a 3db directional coupler 17 comprising plural branching waveguide 21, and power is distributed from terminals F, G and outputted. Since the microwave power distributed in this way, the lateral width is halved to a conventional width.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a microwave power divider used in the senna meter wave and millimeter wave bands.

[Prior art]

FIG. 1 is a perspective view showing the configuration of a conventional microwave power divider. In the figure, (1) is a waveguide lid (lid) constituting the tube wall of the waveguide, and FIG. 1 shows the state with the lid (1) removed. (2) is 3 using Magic T.
dB (decibel) power divider, (3) is the first phase shifter, (41 is the fang 2 phase shifter, these phase shifters are waveguide type ferrimagnetic mate
(real) phase shifter, and (5) is a 3 dB directional coupler using a waveguide short slot.

Electromagnetic waves in TE1o mode are input from terminal A shown in FIG. 1, and are output after being distributed to terminals B and C shown in FIG. 1 at a desired power ratio. The part of the waveguide up to terminal A is the first rectangular waveguide, 3
3 from the dB power divider (2) via the first phase shifter (3)
dB directional coupler (the part up to 51 is connected to the second rectangular waveguide, and the 3dB power divider passes through the second phase shifter +41 to 3dB
B directional coupler (the part reaching 51 is a third rectangular waveguide,
The part of the waveguide connected to terminal B is a fourth rectangular waveguide,
The portion of the waveguide connected to the terminal CK will be referred to as a fifth rectangular waveguide.

In Fig. 1, (6) is the waveguide housing, (7) is the metal post for matching of the 3dB power divider + 2), and 8) is the metal post for absorbing the negative phase component of the 3dB power divider + 2). A reflective terminator, (9) is a toroidal ferrimagnetic material, 1101 is a matching dielectric, (old) is an excitation conductor, +12 is a conductor plate parallel to the direction of the electric field, and (13) is a slot.

The electromagnetic waves from the first rectangular waveguide are equally distributed by a 3 dB' power divider (2) and enter the second and third rectangular waveguides, where the ferrimagnetic wave (9
), and phase-shifts the electromagnetic waves in the second and third rectangular waveguides, respectively.
The phase shifter (3) shifts the phase by θ, and the second phase shifter (4) shifts the phase by θ.
Now, if the phase is shifted by 90°-〇, the power input to the fourth rectangular waveguide via the 3 dB directional coupler (5) and the power input to the rectangular waveguide of fang 5 will be Power ratio Fi
, cos2θ: 5in2θ. Excitation conductor t11
By changing the current of 1, the power distribution ratio e08θ:
slnθ can be changed.

By the way, in a waveguide that transmits electromagnetic waves in the TE1o mode, the cutoff frequency is determined by the width (waveguide width) K in the direction perpendicular to the electric field on the inner wall of the waveguide and the direction of propagation of the electromagnetic waves. The widths of the second, third, fourth, and fifth rectangular waveguides must be set equal to or larger than a predetermined value determined according to the wavelength to be transmitted, and When the waveguides are arranged in the width direction, there is a drawback that the combined width becomes about twice the width of the first rectangular waveguide.

[Summary of the invention]

This invention has been made in order to eliminate the drawbacks of the conventional ones as described above, and in this invention, the second and third waveguides are arranged stacked in the direction of the electric field, so that it can be used as a 3 dB force divider. By using a waveguide type power divider that distributes power equally in the direction of the electric field and a 3 dB branching waveguide type directional coupler, the width can be made smaller than that of a conventional IA. A microwave power divider is provided.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view and a sectional view showing an embodiment of the first invention of this application, and the same reference numerals as in FIG. 1 indicate the same or corresponding parts. However, FIG. 2(a) is a perspective view, and a sectional view taken along line 1)-D in FIG. 2 (bl is FIG. 2FA).

E. In Figure 2, CI4 is a 3dB power divider, 0υ, O
Q are the first and second phase shifters corresponding to +31 and +41 in FIG. 1, respectively. However, the phase shifter (1 →, OQ is stacked in the direction of the electric field. (1, 7+ is 3 dB
It is a directional coupler. The electromagnetic wave in the TE1o mode inputted to the E terminal shown in FIG. 2 fbl is electrically distributed to the F and G terminals and output. As in the case of Fig. 1, the waveguide up to terminal E is a 2'1 rectangular waveguide and a 3dB power divider (b).
from the first phase shifter 0!3 to the 3dB directional coupler (1
The part up to 71 is a second rectangular waveguide, 3dB?
11 force distributor 0→ to second phase shifter (IQ 'e via 3
dB directional coupler (the part in the trench leading to I71 is the third rectangular waveguide, the waveguide after the G terminal is the 2nd and 4th waveguide, and the equal wave tube after the F terminal is the 5th rectangular waveguide) It is called a rectangular waveguide.

11'D is a partitioning conductor plate provided on a plane perpendicular to the electric field,
The waveguide walls of the armrests of the second and third rectangular waveguides are configured. 09] is a hole provided in the conductor plate f18), ■ is a hole t
19) Radio wave absorber plates attached to both sides of (2)) Vi
It is a branch waveguide.

Figure 2 (as shown in bl, TE1 incident from terminal E
The 0 mode electromagnetic wave is equally distributed by the conductor plate +181 in the direction of the solid line arrow and the broken line arrow, and enters the second and third rectangular waveguides, respectively.
I-type body Sugi phase generator 0″3. Phase shift σ by a*.

As explained with reference to FIG. 1, if the first and second phase shifters perform phase shifts of θ and 90°-σ, respectively, the electromagnetic waves input to the fourth and fifth rectangular waveguides The power ratio is cosθ and sinθ.

In this case, the 3 dB directional coupler includes a plurality of branch waveguides (
2)). Further, the radio wave absorber plate (2Q) is installed to prevent the negative phase components of the reflected waves from the first and second phase shifters 0→,H from having an adverse effect on the power distribution characteristics.

FIG. 3 is a perspective view and a sectional view showing an embodiment of the second invention of this application.
3(a) is a sectional view taken along line 1)-D in FIG. 3(a). In FIG. 3, the same reference numerals as in FIG. 2 indicate the same or corresponding parts, and (22) is a coupling hole. 3dB power divider 04,
The structure and operation of the first phase shifter 09 and the second phase shifter 0O are the same as in the case of Fig. 2, and the 3 dB directional coupler (17) shown in Fig. 3 is stacked in the electric field direction. The coupling holes (22
), but its directional coupling characteristics are the same as in the case of FIG. The second phase shifter (IQ,
(When the amount of phase shift at 1G is θ, 90°−〇 as explained with reference to FIG. 2, the power ratio of the electromagnetic waves input to the fourth and fifth rectangular waveguides is C082θ:5in2θ.

In the microwave power divider configured as described above, the waveguides are stacked in the direction of the electric field, so the width can be reduced to IA compared to the conventional power divider.

In addition, TE1o mode electromagnetic waves are propagating inside the waveguide, and the electromagnetic field distribution in the electric field direction is uniform, so
The turning section allows miniaturization in the electric field direction (waveguide height direction) without changing the cutoff frequency, and it is possible to avoid increasing the size in the height direction due to stacking waveguides.

〔Effect of the invention〕

As described above, according to the present invention, a conductor plate (18) having a plane perpendicular to the electric field is used, and a waveguide-type power divider that equally distributes the incident wave in the direction of the electric field is used. Since the force distributor is configured, its width can be reduced to μ of the conventional one.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the configuration of a conventional microwave force distributor, FIG. 2 is a perspective view and a sectional view showing an embodiment of the invention 1.1 of this application, and FIG. 3 is a perspective view showing the configuration of a conventional microwave force distributor. It is a perspective view and a sectional view showing an example of the second invention. tl+...Waveguide lid, 16)...Waveguide housing, (9
)... Ferrimagnetic material, (10)... Matching dielectric material,
Old)...Excitation conductor, 04...3dB power divider,
09...First phase shifter, 00...Second phase shifter, Plane...3dB directional coupler, 181...Conductor plate, 11
Sickle...hole, Ka...radio wave absorber plate, (2)...branch waveguide, (22)...coupling hole. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A 3 dB power divider that distributes the electromagnetic waves transmitted in the TE_1_0 mode in the first rectangular waveguide to the second and third rectangular waveguides; a first phase shifter for shifting the phase of the electromagnetic wave distributed to the third rectangular waveguide in relation to the phase shift amount of the first phase shifter; a second phase shifter for phase shifting, and a 3 decibel direction for combining the electromagnetic waves phase-shifted by the first and second phase shifters and coupling them to the fourth and fifth rectangular waveguides, respectively. the second and third rectangular waveguides are configured of rectangular waveguides stacked on top of each other in the direction of the electric field; The conductor plate constituting the waveguide wall of the stacked portion of rectangular waveguides in No. 3 is located in a plane perpendicular to the direction of the electric field of the first rectangular waveguide, and is provided between the conductor plate and this conductor plate. The above-mentioned 3 decibel power divider is constituted by a hole provided in the hole and radio wave absorber plates provided on both sides of this hole, and the above-mentioned first phase shifter is a waveguide type inserted into the above-mentioned second rectangular waveguide. The second phase shifter is composed of a ferrimagnetic phase shifter and its excitation circuit, and the second phase shifter includes a waveguide-type ferrimagnetic phase shifter inserted into the third rectangular waveguide and its excitation circuit. The 3 dB directional coupler couples the surfaces perpendicular to the electric field of the second and third rectangular waveguides with a plurality of branch waveguides to form the fourth and fifth rectangular waveguides. A microwave power divider characterized in that it is coupled to a tube. (2) A 3 dB power divider that distributes the electromagnetic waves transmitted in the TE_1_0 mode in the first rectangular waveguide to the second and third rectangular waveguides; a first phase shifter for shifting the phase of the electromagnetic wave distributed to the third rectangular waveguide in relation to the phase shift amount of the first phase shifter; a second phase shifter for phase shifting, and a 3 decibel direction for combining the electromagnetic waves phase-shifted by the first and second phase shifters and coupling them to the fourth and fifth rectangular waveguides, respectively. the second and third rectangular waveguides are composed of rectangular waveguides stacked on top of each other in the direction of the electric field; The conductor plate constituting the waveguide wall of the stacked portion of rectangular waveguides in No. 3 is located in a plane perpendicular to the direction of the electric field of the first rectangular waveguide, and is provided between the conductor plate and this conductor plate. The above-mentioned 3 decibel power divider is constituted by a hole provided in the hole and radio wave absorber plates provided on both sides of this hole, and the above-mentioned first phase shifter is a waveguide type inserted into the above-mentioned second rectangular waveguide. The second phase shifter is composed of a ferrimagnetic phase shifter and its excitation circuit, and the second phase shifter includes a waveguide-type ferrimagnetic phase shifter inserted into the third rectangular waveguide and its excitation circuit. The 3 dB directional coupler is configured such that the second and third rectangular waveguides are connected to each other by a coupling hole penetrating the waveguide wall of the stacked portion of the second and third rectangular waveguides. A microwave power divider characterized in that a plane perpendicular to the electric field is connected to the fourth and fifth rectangular waveguides.