JPS5816242Y2 - Faraday-swirling waveform reversible phase shifter - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a Faraday rotary waveform type reversible phase shifter which is intended to simplify the manufacturing method and reduce the cost.

First, the structure and operation of a conventional Faraday rotating waveform type reversible phase shifter will be explained, and then this invention will be explained in detail.

Figures 1a, b, c, and d are cross-sectional views of the structure of a Faraday rotary waveform reversible phase shifter;
They are AA', BB', and CC' cross-sectional views.

A resistor 3 having a predetermined resistance value is deposited on the wide side surface of a dielectric material 2 having a dielectric constant almost equal to that of the ferrimagnetic material 1,
Then, two dielectric materials 2 are pasted together so as to sandwich the resistor 3 therebetween.

After this dielectric material and the ferrimagnetic material 1 are bonded and integrated, the entire surface other than the two ends is plated with copper to an appropriate thickness by a technique such as electroless plating to form a coated waveguide 4. .

Then, a permanent magnet 5, a coil 6, and a ferrimagnetic yoke 7 are arranged on this Menki waveguide as shown in the figure.

The phase shifter is then assembled by mounting the whole on a waveguide 8 and gluing matching dielectrics 9 to both ends.

FIG. 2 is a diagram for explaining the operating principle of a phase shifter, which includes an impedance matching device, a linear polarizer, a circularly polarized wave generator, and a Faraday rotator.

Now, in the figure (・, linearly polarized input wave 'x E
In, the output wave to the right side is Eout, and assuming no loss 4, Eout=Ein-e-J(θF+θv) ---
−・−(1) θF 6, A, (u + −
K ) 1/2 --・----・I2) 02 °to 1. -γ°4"Mr9909091.The relationship (3) holds (・ru).

Here, θF is the fixed phase amount of the part other than θF (the phase amount of the Faraday rotator part), A is a constant determined by the ferrimagnetic material constant and the waveguide dimensions, and γ is the gyromagnetic
tic rati.

(28MHz10e) yf is the operating frequency, 4
πMr is the strength of residual magnetization within the ferrimagnetic body.

Since 4πMr changes depending on the value and direction of the current flowing through the coil, θF can be changed.

Trying to obtain the phase shift amount by changing θF is
This is the operating principle of this phase shifter.

By the way, as can be seen from the structural diagram shown in FIG. 1, this phase shifter was relatively expensive due to the large number of component parts and high processing costs.

In particular, the linear polarizer required the most trouble because it had a structure in which two dielectrics were pasted together.

This invention is a modification of the manufacturing method of the linear polarizer in order to solve this drawback, and will be explained in detail below.

FIG. 3 shows a conventional linear polarizer, and FIG. 4 shows a linear polarizer according to this invention.

As can be seen from Fig. 4, according to this invention, the dielectric material can be
Instead of being divided, the structure is such that a slintler is cut and, for example, a liquid resistor is poured into the slit and solidified.

If such a structure is adopted, the dielectric processing cost will be reduced to about 1/2, and the labor involved in assembling the phase shifter will also be reduced.

As described above, according to this invention, by changing the manufacturing method of the linear polarizer, the processing cost can be reduced and the number of manufacturing steps can be reduced, so that the cost of the phase shifter can be reduced.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the structure of a conventional Faraday rotary wave element type reversible phase shifter, Figure 2 is for explaining the operation, Figure 3 is a diagram of a linear polarizer with a conventional configuration, and Figure 4 is based on this invention. FIG. 2 is a diagram of a linear polarizer. In the figure, 1 is a ferrimagnetic material, 2 is a dielectric material, 3 is a resistor, and 4
1 is a Menki waveguide, 5 is a permanent magnet, 6 is a coil, 7 is a ferrimagnetic yoke, 8 is a waveguide, 9 is a matching dielectric, and 10 is a slit. Note that in the figures, the same parts are denoted by the same reference numerals.

Claims (1)

[Scope of utility model registration request] A Faraday rotary waveform reversible phase shifter consists of a ferrimagnetic material, a dielectric material, a resistor, a permanent magnet, a ferrimagnetic yoke, a coil, a Mönkki waveguide, and a matching dielectric material.
A Faraday rotary wave element type reversible phase shifter characterized in that a linear polarizer is constructed by providing a slit of an appropriate size in the dielectric and inserting a resistor into the slit.