JPH01181202A - Waveguide switch - Google Patents

Abstract

PURPOSE:To improve the rotating position accuracy of a rotor and to improve the electric performance and thermal performance by providing a permanent magnet fixed to a rotor, three sets of electromagnet magnetic poles fitted to a waveguide stator and a mechanism hindering the rotor from being driven by >=+ or -45 deg. with respect to the waveguide stator. CONSTITUTION:The permanent magnet 1 is fixed to the rotor 3 orthogonally to a rotor rotary shaft and the electromagnets 2a1-2a2-2c1-2c2 are fixed to the waveguide stator 4 at an interval of nearly 60 deg. respectively. The rotor 3 of the switching states A, C is turned by + or -45 deg. from the rotor position of the switching state B, an arcuate slot 41 is provided on the bottom face of the waveguide stator 4, a pin 31 fitted to the slot 41 is projected from the rotor 3 so as not to allow the rotor 3 to be turned by >=+ or -45 deg.. The changeover from the state A to B is implemented by giving a pulse current to the electromagnets 2a1-2a2 and 2b1-2b2 to cause the N pole to the electromagnets 2a1, 2b2 and the S pole to the electromagnets 2a2, 2b1 thereby causing repulsion and attraction with the permanent magnet 1. It is not required for the further current flowing after the permanent magnet 1 is once driven.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a waveguide switch used in microwave and millimeter wave bands.

[Conventional technology]

Conventionally, this type of waveguide switch uses a step motor to rotate and hold the rotor. When a switching signal is input, the rotor is normally rotated 45° to move to the next switching state, and three switching states can be selected in 45° steps. As an example is shown in FIG. 5, the four openings of the waveguide stator 6 in mutually orthogonal directions are
.

γ, δ, and the switching states in FIG. , α-1 in switching state B
In switching state C, conduction occurs between α-6 and β-1.

[Problem that the invention seeks to solve]

The conventional waveguide switch described above is convenient for application to communication equipment because it can obtain three switching states. It is difficult to connect the waveguide path between the rotor 5 and the rotor 5, which has the drawback that the VSWR tends to deteriorate.Also, since the rotor 5 is held by bearings, the amount of heat generated in the rotor 5 is transferred to the waveguide stator. It has the disadvantage that it is difficult to dissipate heat to the 6 side, making it unsuitable for high power applications.

[Means for solving problems]

The waveguide switch of the present invention accommodates a rotor having three waveguide paths inside a waveguide stator having four openings whose directions are orthogonal to each other, and this rotor is arranged mutually with respect to the waveguide stator. In the waveguide switch, the connection between the four openings is switched depending on which of three rotational positions spaced at 45 degree intervals is taken, and a permanent magnet fixed to the rotor perpendicular to the rotation axis of the rotor; , three sets of electromagnetic poles fixed to the waveguide stator while facing each other at intervals of about 60 degrees to the permanent magnet, and a mechanism for preventing the rotor from rotating more than ±45 degrees with respect to the waveguide stator. Contains.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIGS. 1 to 4 are drawings for explaining one embodiment of the present invention. FIG. 1 is an explanatory diagram showing the positional relationship between a permanent magnet and three sets of electromagnets, and FIG. FIG. 3 is a cross-sectional view of the wave tube stator, FIG. 3 is a bottom view, and FIG. 4 is an explanatory diagram showing the relationship between the magnetic pole directions of the permanent magnets and the magnetic pole directions of three sets of electromagnets. In Figures 1, 2, and 4, (a), (b)
.

(C) corresponds to three switching states A, B, and C.

In Fig. 1, 1 is a permanent magnet fixed to the rotor perpendicular to the rotor rotation axis, 2al-2a2.2bl-2b
2.2cl-2c2 each have approximately 60
This is a set of electromagnets fixed at an interval of .degree. and facing the permanent magnet 1. In FIG. 2, 3 is a rotor, and 4 is a waveguide stator. Here, the rotor 3 in the switching states A, C is tilted by ±45° from the rotor position in the switching state B, and the rotor 3
Since it is sufficient to rotate within this range, an arcuate groove 41 is provided on the bottom surface of the waveguide stator 4, as shown in FIG.
A pin 31 that fits into a groove 41 is made to protrude from the rotor 3 to prevent the rotor 3 from rotating more than ±45°.

As shown in FIG. 4, in the switching state A, the permanent magnet 1 and the electromagnets 2al-2a2 try to stabilize with minimum magnetic loss, so a rotational torque t1 acts on the rotor 3 in the counterclockwise direction.
45 by the pin 31 contacting one end of the groove 41.
° is maintained.

In switching state C, clockwise rotation torque t2 acts on rotor 3, contrary to switching state A, and in switching state B, permanent magnet 1 acts on rotor 3.
A stable state is obtained by minimizing the magnetic loss between the magnets 2bl and 2b2 and the electromagnets 2bl-2b2.

Switching from switching state iA to switching state QB is performed using electromagnet 2al-
A pulsed current is passed through 2a2 and 2bl-2b2, and 2
This is done by generating N poles at al, 2b2 and S poles at 2a2°2bl, repelling the permanent magnet 1 from the electromagnets 2al-2a2, and attracting it to the electromagnets 2b1-2b2.

After the permanent magnet 1 rotates in the direction of the electromagnets 2bl-2b2, as mentioned above, it is held at the position where the minimum magnetic resistance is achieved due to the characteristics of the magnetic circuit, so there is no need to apply current.Similarly, switching state B A letter of change! You can switch to C, or switch in the opposite direction.

The rotor 3 and the waveguide stator 4 are positioned by mechanical contact between the pin 31 and the end of the groove 41 in switching state A and switching state Bc, and in switching state B, the magnetic resistance is minimized. Since it can be set, the three states can be adjusted and fixed independently, with extremely high accuracy. In addition, in switching state A and switching state C in which two waveguide paths can be set, there is mechanical contact between the rotor 3 and the waveguide stator 4 via the pin 31 and the groove 41, so that heat dissipation is improved. This is also a significant improvement over the conventional example, which relied solely on bearings.

〔Effect of the invention〕

As explained above, the present invention has the effect of providing a waveguide switch that has better rotor rotational position accuracy than conventional waveguide switches, and therefore has superior electrical performance and thermal performance. be.

[Brief explanation of the drawing]

FIGS. 1 to 4 are drawings for explaining one embodiment of the present invention. FIG. 1 is an explanatory diagram showing the positional relationship between a permanent magnet and three sets of electromagnets, and FIG. Figure 3 is a cross-sectional view of the wave tube stator, Figure 3 is a bottom view, Figure 4 is an explanatory diagram showing the relationship between the magnetic pole direction of the permanent magnet and the magnetic pole direction of three sets of electromagnets, and Figure 5 is a conventional waveguide. It is an explanatory view showing a switching state of an example of a switch. 1... Permanent magnet, 2al, 2a2, 2bl, 2b2.
2C1, 2C2... Electromagnet, 3... Rotor, 4...
・Waveguide stator, 31...pin, 41...groove. Agent: Patent Attorney Nai M Susumu/, Ei1 I; G Zat, Zazt2bb2b2.
Zcr, 2cz: tμ easy M 1 time, arrow 2 times

Claims (1)

[Claims] A rotor having three waveguide paths is housed inside a waveguide stator having four openings whose directions are orthogonal to each other, and the rotor has three openings spaced apart from each other by 45 degrees with respect to the waveguide stator.
In the waveguide switch, the mutual connection of the four openings is switched depending on which of the four rotational positions the permanent magnets are fixed to the rotor perpendicularly to the rotational axis of the rotor; The invention is characterized in that it includes three sets of electromagnetic magnetic poles that are fixed to the waveguide stator and face each other at a degree interval, and a mechanism that prevents the rotor from rotating more than ±45 degrees with respect to the waveguide stator. waveguide switch.