CN115498381A

CN115498381A - Series excitation method for differential phase shift ferrite lock type switch

Info

Publication number: CN115498381A
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: 2022-12-20
Anticipated expiration: 2042-08-19
Also published as: CN115498381B

Abstract

The invention discloses a series excitation method of a differential phase shift ferrite lock-type switch, which belongs to the field of microwave devices, and comprises the steps of exciting a phase shift section A (2) and a phase shift section B (3) in series, wherein the excitation currents have the same magnitude and opposite directions, exciting the phase shift section A (2) in a forward direction, and exciting the phase shift section B (3) in a reverse direction, so that the differential phase shift switch is excited to a port P1 → P2; reverse-actuating the phase-shifted segment A (2) and forward-actuating the phase-shifted segment B (3) to actuate a differential phase-shifting switch to port P1 → P3; the differential phase shift ferrite lock-type switch excitation method can realize the accurate control of the output phases of the two parallel phase shift sections, and has the advantages of simple control, stable excitation and high speed.

Description

Series excitation method for differential phase shift ferrite lock type switch

Technical Field

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

Background

The ferrite lock switch plays a role in channel switching in a microwave system and is a key part in the microwave system. With the increasing power capacity and operating frequency band of microwave systems, microwave switches or modules, which can be conventionally implemented by semiconductors or other means, have been unable to meet the application requirements. High power differential phase shift ferrite latching switches combine the advantages of low loss, high power capability and switching speeds in the microsecond range, and are combined as the only option in many high power applications. Differential phase shift ferrite lock switches are gaining increasing attention in the art as one of the key components in high power microwave systems.

The typical structure of the differential phase-shift ferrite lock-type 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, a phase-shift section B3 and a 3DB bridge 4. A signal is input from a port P1, power is evenly divided through the magic T power divider 1, the signal respectively enters the phase-shifting section A2 and the phase-shifting section B3, and the 3DB bridge 4 determines the signal to be output from the port P2 or the port P3 according to the phase relation of output signals of the phase-shifting section A2 and the phase-shifting section B3. The phase shift section A2 and the phase shift section B3 need an external driver to carry out current excitation, and the excitation current determines the output phase difference of the phase shift section A2 and the phase shift section B3 and finally influences the electrical performance index of the whole differential phase shift switch.

Specifically, as mentioned above, the differential phase shift ferrite lock switch includes two parallel ferrite phase shift sections inside, and in order to obtain the optimal electrical performance index for the differential phase shift switch, the output phase difference of the two parallel ferrite phase shift sections is required to be ± 90 degrees during operation. Therefore, higher requirements are put forward on the insertion phase consistency of the two parallel phase-shifting sections, and simultaneously higher requirements are put forward on the control precision of the excitation current.

At present, the differential phase shift ferrite lock-type switch is mainly applied to high-speed switching occasions of high-power microwave channels, belongs to special customized products, and has no report of related excitation methods.

Disclosure of Invention

The invention aims to provide a series excitation method of a differential phase shift ferrite lock switch, so as to solve the problems.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a differential phase shift ferrite lock-type switch series excitation method comprises a phase shift section A and a phase shift section B, wherein the excitation method is to excite the phase shift section A and the phase shift section B in series, and excitation currents are identical in magnitude and opposite in direction.

As a preferable technical scheme: actuating the phase shift section A in a forward direction and the phase shift section B in a reverse direction to actuate a differential phase shift switch to port P1 → P2; and reversely exciting the phase-shifting section A, and positively exciting the phase-shifting section B to excite the differential phase-shifting switch to a port P1 → P3, wherein the positive excitation means that the excitation current enters from the left side of the phase-shifting section and goes out from the right side of the phase-shifting section, and the reverse excitation means that the excitation current enters from the right side of the phase-shifting section and goes out from the left side of the phase-shifting section.

In order to ensure that the output phases of two parallel phase shift sections in the differential phase shift ferrite lock-type switch are different by +/-90 degrees and obtain the optimal electrical performance index, the invention provides an excitation method of the differential phase shift ferrite lock-type switch, which can realize the accurate control of the output phases of the two parallel phase shift sections,

firstly: as shown in fig. 2, a magnetization curve of the phase shift section of the locking-type ferrite is shown, where the corresponding insertion phase range of the phase shift section a from the reverse saturation magnetization-Br to the forward saturation magnetization + Br is defined as being in the middle of 1 to in the middle of 2, and the corresponding insertion phase range of the phase shift section B from the reverse saturation magnetization-Br to the forward saturation magnetization + Br is defined as being in the middle of 3 to in the middle of 4, as shown in fig. 3;

then: for satisfying phase shift section A, phase shift section B output phase place satisfies 90 relation, require the full temperature range in the front 1 be less than or equal to in the front 3 < in the front 2 be less than or equal to in the front 4 and 90 be less than or equal to in the front 2 in the front 3, therefore this place preferably choose two insert phase consistency better phase shift section, in the front 1 be more than or equal to in the front 3, in the front 2 be more than or equal to in the front 4;

and defining the excitation current to enter and exit from the left side of the phase shift section as forward excitation, and defining the excitation current to enter and exit from the right side of the phase shift section as reverse excitation, 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 a non-saturated state. Move the phase place section A, move the phase place section B and whether work in the saturation state, depend in 2, in 3 phase difference: if the front and back shafts are 2 to 3 to 90 degrees, the phase shifting section A and the phase shifting section B in the direction work in a saturated state; if the angle between the front and the back is more than 90 degrees, at least one phase shift section in the direction works in an 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 component of a typical differential phase shift ferrite lock switch;

FIG. 2 is a magnetization curve of a locking-type ferrite phase-shifting section;

FIG. 3 shows the phase shift section A and the phase shift section B inserting phase;

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

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

fig. 6 is a diagram (left diagram) of an excitation pattern and a current waveform for exciting the differential phase shift switch to the port P1 → P3 in embodiment 1 of the present invention.

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

Detailed Description

The invention will be further explained with reference to the drawings.

Example 1:

a differential phase shift ferrite lock-type switch series excitation method comprises a phase shift section A2 and a phase shift section B3, the excitation method is characterized in that 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 that the differential phase shift switch is excited to the port P1 → P2; as shown in FIG. 6, phase-shifted segment A is reverse-excited and phase-shifted segment B is forward-excited to excite the differential phase-shifted switch to port P1 → P3, wherein the forward excitation refers to excitation current going in and out from the left side of the phase-shifted segment, and the reverse excitation refers to excitation current going in and out from the right side of the phase-shifted segment, as shown in FIG. 4.

And (3) testing the excitation effect:

firstly: a complete Ku waveband 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: exciting two parallel phase-shifting sections of the differential phase-shifting ferrite lock-type switch by adopting the method of the embodiment 1, and testing the excitation time by using an oscilloscope in the excitation process; after excitation was complete, the vector network analyzer was used to measure electrical performance indicators including standing waves, isolation, loss, etc., with the results shown in table 1:

table 1 electrical property data obtained using the excitation method of example 1 at room 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 the electrical performance index is better after the excitation, the excitation is stable, and the excitation time is shorter.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A method of series excitation of a differential phase shift ferrite lock switch comprising a phase shift section a (2) and a phase shift section B (3), characterized by: the excitation method is characterized in that the phase-shifting section A (2) and the phase-shifting section B (3) are excited in series, and excitation currents are identical in magnitude and opposite in direction.

2. The differential phase shift ferrite lock-switch series excitation method of claim 1, wherein: energizing the phase-shifted segment A (2) in a forward direction and the phase-shifted segment B (3) in a reverse direction, thereby energizing the differential phase-shifted switch to port P1 → P2; the phase-shifting section A (2) is reversely excited, and the phase-shifting section B (3) is forwardly excited, so that the differential phase-shifting switch is excited to a port P1 → P3, wherein the forward excitation means that the excitation current enters from the left side and exits from the right side of the phase-shifting section, and the reverse excitation means that the excitation current enters from the right side and exits from the left side of the phase-shifting section.

3. The differential phase shift ferrite lock switch series excitation method of claim 1, wherein: the corresponding insertion phase range of the phase shift section A (2) from the reverse saturation magnetization-Br to the forward saturation magnetization + Br is from the middle to the middle of 1 to 2, the phase shift section B (3) is from reverse saturation magnetization-Br to forward saturation magnetization + Br within range corresponding insertion phase range for in the middle 3 to in the middle 4, wherein, in the middle 1 ≈ in the middle 3, in the middle 2 ≈ in the middle 4.