CN115498381B

CN115498381B - Differential phase shift ferrite lock type switch series excitation method

Info

Publication number: CN115498381B
Application number: CN202210998185.4A
Authority: CN
Inventors: 赵勇; 张芦; 张志红; 王檠; 张远; 唐宝权; 毛亮海
Original assignee: CETC 9 Research Institute
Current assignee: CETC 9 Research Institute
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2024-01-16
Anticipated expiration: 2042-08-19
Also published as: CN115498381A

Abstract

The invention discloses a differential phase shift ferrite lock type switch serial excitation method, belonging to the field of microwave devices, wherein the excitation method is to serially excite a phase shift section A (2) and a phase shift section B (3), excitation currents are the same in magnitude and opposite in direction, forward excite the phase shift section A (2), and reversely excite the phase shift section B (3), so that the differential phase shift switch is excited to a port P1→P2; exciting the phase shift section A (2) reversely, and exciting the phase shift section B (3) positively, so as to excite the differential phase shift switch to ports P1→P3; the differential phase shift ferrite lock type switch excitation method can realize the accurate control of the output phases of two parallel phase shift sections, and has the advantages of simple control, stable excitation and high speed.

Description

Differential phase shift ferrite lock type switch series excitation method

Technical Field

The invention relates to the field of microwave devices, in particular to a differential phase shift ferrite lock type switch series excitation method.

Background

The ferrite lock switch plays a role of channel switching in the microwave system and is a weight-closing part in the microwave system. With the increasing power capacity and operating frequency bands of microwave systems, conventional microwave switches or components, which may be implemented by semiconductor or other means, have failed to meet the application needs. The high power differential phase shifting ferrite lock switch combines the advantages of small loss, high power withstand capability and microsecond switching speed, and is a unique choice in many high power applications. Differential phase shifting ferrite lock switches are becoming increasingly important in the art as one of the key components in high power microwave systems.

The typical structure of the differential phase shift ferrite lock switch is shown in fig. 1, and mainly comprises a magic T power divider 1, two parallel phase shift sections, namely a phase shift section A2 and phase shift sections B3 and 3DB bridges 4. The signal is input from the P1 port, power is divided by the magic T power divider 1, the signals enter the phase shift section A2 and the phase shift section B3 respectively, and the 3DB bridge 4 determines the signal to output from the P2 port or the P3 port according to the phase relation of the output signals of the phase shift section A2 and the phase shift section B3. The phase shift sections A2 and B3 need an external driver to perform current excitation, and the excitation current determines the output phase difference of the phase shift sections A2 and B3 and finally influences the electrical performance index of the whole phase difference phase shift switch.

Specifically, as described above, the differential phase-shifting ferrite lock switch includes two parallel ferrite phase-shifting sections therein, and in order to obtain an optimal electrical performance index for the differential phase-shifting switch, the outputs of the two parallel ferrite phase-shifting sections are required to differ by ±90 degrees in operation. Therefore, the method has high requirements on the consistency of the insertion phases of the two parallel phase shifting sections and also on the control accuracy of the excitation current.

The current differential phase shift ferrite lock switch is mainly applied to high-speed switching occasions of high-power microwave channels, belongs to special custom products, and is not reported in related excitation methods.

Disclosure of Invention

The invention aims to provide a differential phase shift ferrite lock type switch series excitation method for solving the problems.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a differential phase shift ferrite lock switch serial excitation method comprises a phase shift section A and a phase shift section B, wherein the phase shift section A and the phase shift section B are serially excited, and excitation currents are the same in magnitude and opposite in direction.

As a preferable technical scheme: exciting the phase shifting section A in the forward direction and exciting the phase shifting section B in the reverse direction, so as to excite the differential phase shifting switch to the port P1→P2; and (3) reversely exciting the phase-shifting section A, and positively exciting the phase-shifting section B so as to excite the differential phase-shifting switch to the port P1-P3, wherein the forward excitation means that excitation current enters and exits from the left side of the phase-shifting section, and the reverse excitation means that excitation current enters and exits from the right side of the phase-shifting section.

In order to ensure that the output phases of two parallel phase shifting sections in a differential phase shifting ferrite lock switch are within +/-90 degrees and obtain the optimal electric performance index, the invention provides a differential phase shifting ferrite lock switch excitation method which can realize the accurate control of the output phases of the two parallel phase shifting sections,

first,: as shown in fig. 2, the magnetization curve of the lock-type ferrite phase-shifting segment is shown, wherein the insertion phase range corresponding to the phase-shifting segment a from the reverse saturation magnetization-Br to the forward saturation magnetization +br is defined as being from 1 to 2, and the insertion phase range corresponding to the phase-shifting segment B from the reverse saturation magnetization-Br to the forward saturation magnetization +br is defined as being from 3 to 4, as shown in fig. 3;

then: in order to meet the condition that the output phases of the phase shifting section A and the phase shifting section B meet the relation of +/-90 degrees, the total temperature range is required to be 1-less than or equal to 3-less than or equal to 2-less than or equal to 4-less than or equal to 2-less than or equal to 3-less than or equal to 90 degrees, two phase shifting sections with better insertion phase consistency, namely 1-less than or equal to 3 and 2-less than or equal to 4 are preferably selected;

and the excitation current is defined to be forward excitation from the left in and the right out of the phase shift section, and the excitation current is defined to be reverse excitation from the right in and the left out of the phase shift section, as shown in fig. 4.

By adopting the series excitation method, only one group of excitation circuits is needed, the excitation circuits are simple, the excitation time is long, and the phase-shifting section A and the phase-shifting section B can work in an unsaturated state. Whether phase shift section a, phase shift section B operates in saturation depends on the phase difference of 2, 3: if 2-, 3=90°, the phase shift sections a and B in the direction are in saturation; if 2-and 3 > 90 DEG, at least one phase shift section in this direction is operated in the unsaturated state.

Compared with the prior art, the invention has the advantages that: the differential phase shift ferrite lock type switch excitation method can realize the accurate control of the output phases of two parallel phase shift sections, only needs one group of excitation circuits, and has the advantages of simple control, stable excitation and high speed.

Drawings

FIG. 1 is a structural composition of a typical differential phase shifting ferrite lock switch;

FIG. 2 is a plot of the magnetization of a phase shift section of a lock ferrite;

fig. 3 shows the insertion phases of phase shift section a and phase shift B;

FIG. 4 is a schematic diagram of the excitation direction of the phase shift section;

FIG. 5 is a diagram of the current waveform and the excitation pattern (left diagram) of the differential phase shift switch to the ports P1→P2 in embodiment 1 of the present invention;

fig. 6 is a diagram of the excitation pattern (left diagram) and the current waveform (right diagram) of the differential phase shift switch excited to the ports p1→p3 in embodiment 1 of the present invention.

In the figure: 1. a magic T power divider; 2. a phase shift section A; 3. a phase shift section B; 4. 3DB bridge.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

Example 1:

the differential phase shift ferrite lock type switch series excitation method comprises a phase shift section A2 and a phase shift section B3, wherein the phase shift section A2 and the phase shift section B3 are excited in series, excitation currents are the same in magnitude and opposite in direction, and the phase shift section A2 and the phase shift section B3 can be excited until the output phase is +/-90 degrees;

in this embodiment, as shown in fig. 5, the phase shift section a is excited in the forward direction and the phase shift section B is excited in the reverse direction, so as to excite the differential phase shift switch to the ports p1→p2; as shown in fig. 6, the phase shift section a is excited reversely, the phase shift section B is excited positively, so that the differential phase shift switch is excited to the port p1→p3, wherein the forward excitation means that the excitation current enters from the left to the right of the phase shift section, and the reverse excitation means that the excitation current enters from the right to the left of the phase shift section, as shown in fig. 4.

Excitation effect test:

first,: a complete Ku band difference phase shift ferrite lock type switch is manufactured by adopting a brand X8HA11 ferrite material, and the structure is shown in figure 1;

then: the method of the embodiment 1 is adopted to excite two parallel phase shifting sections of the differential phase shifting ferrite lock switch, and an oscilloscope is used for testing excitation time in the excitation process; after excitation is completed, the electrical performance indexes including standing waves, isolation, loss and the like are measured by using a vector network analyzer, and the results are shown in table 1:

TABLE 1 Electrical performance data obtained by the excitation method of example 1 at ambient temperature

As can be seen from Table 1, the method of the invention can realize the excitation of the differential phase shift ferrite lock switch, and has the advantages of good electrical performance index after excitation, stable excitation and short excitation time.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. A differential phase shift ferrite lock type switch serial excitation method is provided, wherein the differential phase shift ferrite lock type switch comprises a phase shift section A (2) and a phase shift section B (3), and is characterized in that: the excitation method is that the phase-shifting section A (2) and the phase-shifting section B (3) are excited in series, and excitation currents have the same magnitude and opposite directions;

the phase shift section A (2) is excited in the forward direction, and the phase shift section B (3) is excited in the reverse direction, so that a differential phase shift switch is excited to ports P1-P2; and (3) exciting the phase-shifting section A (2) reversely, and exciting the phase-shifting section B (3) positively, so as to excite the differential phase-shifting switch to the port P1-P3, wherein the forward excitation means that exciting current enters and exits from the left side of the phase-shifting section, and the reverse excitation means that exciting current enters and exits from the right side of the phase-shifting section.

2. The differential phase shifting ferrite lock switch series excitation method of claim 1, wherein: the phase shift section A (2) has an insertion phase range of 1 to 2 corresponding to the range from reverse saturation magnetization-Br to forward saturation magnetization +Br, and the phase shift section B (3) has an insertion phase range of 3 to 4 corresponding to the range from reverse saturation magnetization-Br to forward saturation magnetization +Br, wherein 1 is approximately equal to 3, 2 is approximately equal to 4, and the insertion phase range is approximately equal to 3.