JPS633202Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a latching circulator.
In particular, in a waveguide-internal magnetic path type latching circulator that is constructed by arranging a ferrimagnetic material at a circuit branch, it is recommended to install a dielectric material on the side surface of the ferrimagnetic material on the extraction side of the ferrimagnetic material excitation conductor. This article relates to a characteristic latching circulator.

Conventionally, a waveguide type latching circulator is constructed by arranging a ferrimagnetic material having a through hole in a waveguide circuit branch part and passing a conductive wire for excitation of the ferrimagnetic material into the ferrimagnetic material. It is widely used as a circuit switching element in the band and sub-millimeter wave frequency bands. FIG. 1 shows an example of a conventional waveguide type latching circulator. Figure 1a is a plan view thereof, Figure 1b is a sectional view,
FIG. 1c is a perspective view of the ferrimagnetic material. In the figure, 1 is a waveguide, 2 is a transformer, and 3 is a waveguide.
is a ferrimagnetic material, 4 is a conductive wire for exciting the ferrimagnetic material,
5 is a waveguide through hole provided in the wall of the waveguide; 6
7 shows the ferrimagnetic material through-hole provided in the ferrimagnetic material, 7 shows the center of gravity of the ferrimagnetic material (that is, the center of gravity of the transformer), and 8 shows the knot of the excitation conductor.
In such a conventional waveguide type latching circulator, the ferrimagnetic excitation wires 4 are wound around the ferrimagnetic body 3 through the ferrimagnetic body through-hole 6 and tied together at the side surface of the ferrimagnetic body.
It is stretched parallel to the waveguide H plane direction and is drawn out to the outside of the waveguide through a waveguide through hole 5 perpendicular to the waveguide E plane. However, since the conductor lead-out section forms a coaxial line with the conductor as the center conductor, when the conductor is drawn out in this way, the electromagnetic waves may leak to the outside of the waveguide due to coupling with the electromagnetic waves inside the waveguide. This problem occurs easily, and since the method of coupling is not uniform, it is difficult to obtain broadband characteristics as a latching circulator.

The purpose of the present invention is to eliminate the above-mentioned drawbacks and to weaken the coupling between the excitation conductor and electromagnetic waves by installing a dielectric material on the side surface of the ferrimagnetic material on the excitation conductor lead-out side, and to improve broadband frequency characteristics. An object of the present invention is to provide a latching circulator having the following features.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 2 shows a waveguide type latching circulator according to an embodiment of the present invention. FIG. 2a is a plan view thereof, FIG. 2b is a sectional view thereof, and FIG. 2c is a perspective view of the ferrimagnetic material. In the case of this embodiment, the difference from the conventional case shown in FIG. 1 is as shown in FIG.
A dielectric material 9 is applied as shown in FIG.

The conductive wire 4 for excitation of the ferrimagnetic material is inserted into the magnetic material through hole 6
are tied at a knot 8 located in the center of the waveguide, stretched parallel to the waveguide H surface direction, and pulled out to the outside of the waveguide through the waveguide through hole 5 perpendicular to the waveguide E surface. There is. FIG. 2c shows a ferrimagnetic material in which a dielectric material is placed near the connection port 8 of the excitation conductor. In this embodiment, by installing a dielectric material 9 near the connection port 8 of the excitation conductor, the coupling state between the ferrimagnetic excitation conductor 4 and the electromagnetic waves in the tube is changed, and the dielectric constant of the dielectric material 9 is By appropriately selecting the size and installation position, it is possible to weaken the coupling between the conducting wire and the electromagnetic waves inside the pipe.
As a result, it is possible to reduce the deterioration of the electrical characteristics of the latching circulator that conventionally occurs due to the above-mentioned coupling, such as unnecessary resonance and leakage of electromagnetic waves in the pipe, and therefore it is also possible to widen the frequency characteristics. . Since the dielectric material 9 acts as an impedance adjustment element, variations in electrical characteristics caused by variations in physical dimensions in the components of the latching circulator, which tend to occur particularly in high frequency regions, can be avoided at high frequencies due to variations in physical dimensions. It is also possible to reduce the influence on the characteristics and achieve uniform and good characteristics.

As explained in detail above, the present invention installs a dielectric material near the knot of the ferrimagnetic excitation conductor, thereby reducing the latching circulator that occurs when the ferrimagnetic excitation conductor couples with electromagnetic waves. Unnecessary resonance and high frequency leakage within the operating frequency band can be reduced, and since the dielectric material also has an impedance adjustment function, it has the effect of ensuring uniform and good characteristics as a latching circulator.

[Brief explanation of the drawing]

Fig. 1a is a sectional view of a conventional latching circulator, Fig. 1b is a longitudinal sectional view taken along line A-A' in Fig. 1a, and Fig. 1c is a sectional view of a conventional latching circulator. FIG. 2a is a plan view of the latching circulator according to the present invention, and FIG. 2b is a perspective view of the ferrimagnetic material shown in FIG. 2a.
FIG. 2c is a perspective view of the ferrimagnetic material used in the latching circulator of the present invention. In the figure, 1... waveguide path, 2... transformer, 3... ferrimagnetic material, 4... ferrimagnetic excitation wire, 5... waveguide through hole, 6... ferrimagnetic material penetration Hole, 7... Center of gravity of ferrimagnetism, 8... Connection for conducting wire, 9...
dielectric material.

Claims (1)

[Scope of utility model registration request] In a latching circulator in which a ferrimagnetic material with an excitation conductor is provided at a waveguide branch,
A latching circulator characterized in that a dielectric material is installed on the side surface of the ferrimagnetic material on the extraction side of the ferrimagnetic material excitation conductor.