High-power waveguide limiter

Abstract

The present invention discloses a high-power waveguide limiter, which comprises a waveguide box body, a rectangular waveguide integrated in the waveguide box body, a coupling detection device and a height-reducing waveguide connected to the rectangular waveguide; a PIN switch diode assembly, a first-stage PIN limiter diode assembly and a second-stage PIN limiter diode assembly are sequentially arranged in a stepped manner on the height-reducing waveguide, and the PIN limiter diodes in the first-stage PIN limiter diode assembly and the second-stage PIN limiter diode assembly are arranged in opposite directions. This high-power waveguide limiter not only improves the power capacity of the limiter, reduces the peak leakage, but also speeds up the recovery time of the limiter, and has a smaller limiting level and a faster recovery time.

Description

Technical Field

[0001] The present invention relates to the field of power electronics technology, and particularly relates to a high-power waveguide limiter. Background Art

[0002] Waveguide components refer to components that use waveguides to control or process electromagnetic waves, and can be respectively used for directional transmission, matching, attenuation or absorption, power distribution, mode (waveform) transformation, isolation, filtering, phase shift and amplification, mixing, detection, frequency multiplication, oscillation, switching, etc. Currently, existing waveguide limiters use discharge tubes. However, the discharge tubes have low reliability and a service life, and new discharge tubes need to be replaced after several years of use. The efficiency is low, the stability and reliability are poor, and the long-term cost is high. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-power waveguide limiter to solve the above-mentioned problems.

[0004] To solve the above technical problems, the present invention provides a high-power waveguide limiter, which includes a waveguide box body, a rectangular waveguide integrated in the waveguide box body, and a coupling detection device and a height-reducing waveguide connected to the rectangular waveguide; a PIN switch diode assembly, a first-stage PIN limiter diode assembly, and a second-stage PIN limiter diode assembly are sequentially and stepwise arranged on the height-reducing waveguide, and the PIN limiter diodes in the first-stage PIN limiter diode assembly and the second-stage PIN limiter diode assembly are arranged in opposite directions.

[0005] Further, the coupling detection device includes a pair of inner conductors supported by a polytetrafluoroethylene block, and both ends of a pair of inner conductors are directly connected to both ends of a detection diode through coupling rods; one of the inner conductors is connected to the rectangular waveguide, and the other inner conductor is connected to the PIN switch diode assembly through a wire.

[0006] Further, the coupling rod connected to the other inner conductor is also connected to a DC loop inductor.

[0007] Further, the PIN switch diode assembly includes a coaxial plug, a short circuit block arranged at one end of the coaxial plug, and the short circuit block is connected to the coupling detection device through a wire; a PIN switch diode is arranged in the coaxial plug, and both ends of the PIN switch diode are connected to a tuning rod through a coupling rod.

[0008] Further, the first-stage PIN limiter diode assembly includes a coaxial plug and a short circuit block arranged at one end of the coaxial plug; a PIN limiter diode is arranged in the coaxial plug, and both ends of the PIN switch diode are connected to a tuning rod through a coupling rod.

[0009] Further, the secondary PIN limiter diode assembly includes a plug and a short circuit block disposed at one end of the plug. A PIN limiter diode is provided in the plug, and the direction of the PIN limiter diode is opposite to that of the PIN limiter diode in the primary PIN limiter diode assembly. Both ends of the PIN switch diode are connected to the tuning rod through a coupling rod. The plug of the primary PIN limiter diode assembly is connected to the plug of the secondary PIN limiter diode assembly through a wire.

[0010] The beneficial effects of the present invention are as follows: When the high-power waveguide limiter detects a signal of a certain power, the switch diode is accelerated to conduct after detection, which not only improves the power capacity of the limiter, reduces the peak leakage, but also speeds up the recovery time of the limiter. Moreover, the PIN limiter diodes of the primary PIN limiter diode assembly and the secondary PIN limiter diode assembly are arranged in a form of one forward and one reverse, which reduces the peak leakage and speeds up the recovery time of the limiter. This solution uses a PIN passive limiter to improve the power capacity. A self-biased limiter circuit can also be used, and PIN diodes with different layer thicknesses are adaptively and hierarchically adjusted and used for stepped matching, having a smaller limiting level and a faster recovery time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The structural schematic diagram of the high-power waveguide limiter is schematically shown.

[0012] Figure 2 The circuit schematic diagram of the high-power waveguide limiter is schematically shown.

[0013] Wherein: 1. waveguide box body; 2. rectangular waveguide; 3. coupling detection device; 4. height-reducing waveguide; 5. PIN switch diode assembly; 6. primary PIN limiter diode assembly; 7. secondary PIN limiter diode assembly; 8. PIN limiter diode; 9. polytetrafluoroethylene block; 10. tuning rod; 11. coupling rod; 12. DC loop inductor; 13. short circuit block; 14. plug; 15. wire; 16. matching rod; 17. PIN switch diode; 18. inner conductor; 19. detection diode. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0017] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0018] See also Figure 1 and Figure 2 The following is a detailed description with reference to the embodiments, and for the sake of simplicity, the following content omits the technical common sense known to technicians in this technical field.

[0019] The design purpose of the present invention is mainly to address the technical defects that the current waveguide limiter adopts a discharge tube, but the discharge tube has low reliability and needs to be replaced with a new discharge tube after a few years of use.

[0020] Therefore, a high-power waveguide limiter of the present application includes a waveguide box 1 , a rectangular waveguide 2 integrated in the waveguide box 1 , and a coupling detection device 3 and a height-reducing waveguide 4 connected to the rectangular waveguide 2 .

[0021] A PIN switch diode assembly 5, a first-level PIN limiter diode assembly 6 and a second-level PIN limiter diode assembly 7 are sequentially arranged on the height-reducing waveguide 4; wherein the PIN switch diode assembly 5, the first-level PIN limiter diode assembly 6 and the second-level PIN limiter diode assembly 7 are arranged in a stepped manner.

[0022] At the same time, the PIN limiter diodes 8 in the primary PIN limiter diode assembly 6 and the secondary PIN limiter diode assembly 7 are arranged in opposite directions. Specifically, the PIN limiter diodes 8 in the primary PIN limiter diode assembly 6 and the secondary PIN limiter diode assembly 7 are connected in a forward direction and a reverse direction, which reduces spike leakage and speeds up the recovery time of the limiter.

[0023] The coupled detection device 3 of the high-power waveguide limiter includes a pair of inner conductors 18 supported by a polytetrafluoroethylene block 9. The ends of the inner conductors 18 can be clamped and supported by the polytetrafluoroethylene block 9. The pair of inner conductors 18 are directly connected to the ends of a detector diode 19 through a coupling rod 11.

[0024] One inner conductor 18 is connected to the rectangular waveguide 2, and the other inner conductor 18 is connected to the PIN switch diode assembly 5 via a wire 15. The output end of the detector diode 19 is connected to the coupling rod 11 connected to the other inner conductor 18, and the coupling rod 11 connected to the other inner conductor 18 is also connected to a DC link inductor 12.

[0025] The PIN switch diode assembly 5 includes a plug 14 and a short-circuit block 13 at one end of the plug 14. The short-circuit block 13 and the plug 14 are insulated, that is, an insulating layer is provided between the short-circuit block 13 and the plug 14. The short-circuit block 13 is connected to the coupling detector 3 via a conductor 15, specifically to another inner conductor 18 of the coupling detector 3. A PIN switch diode 17 is located within the plug 14, and its two ends are connected to the tuning rod 10 via a coupling rod 11.

[0026] The overall setting of the PIN switch diode assembly 5 is perpendicular to the height reduction waveguide 4, the tuning rod 10 is perpendicular to the height reduction waveguide 4, the tuning rod 10 connected to the cathode of the PIN switch diode 17 passes through the height reduction waveguide 4 and is connected to the grounding movable block, and a slot body for accommodating the grounding movable block is correspondingly provided on the other side of the height reduction waveguide 4.

[0027] The first-stage PIN limiting diode assembly 6 and the PIN switch diode assembly 5 of the high-power waveguide limiter are arranged in parallel and at intervals, and have similar structures.

[0028] The primary PIN limiter diode assembly 6 includes a plug 14 and a short-circuit block 13 at one end of the plug 14. The short-circuit block 13 and the plug 14 are insulated, i.e., an insulating layer is provided between the short-circuit block 13 and the plug 14. A PIN limiter diode 8 is located within the plug 14. The two ends of a PIN switching diode 17 are connected to a tuning rod 10 via a coupling rod 11. The tuning rod 10, connected to the cathode of the PIN limiter diode, passes through a step-down waveguide 4 and connects to a grounding block. A corresponding slot for accommodating the grounding block is located on the other side of the step-down waveguide 4.

[0029] Similarly, the secondary PIN limiter diode assembly 7 is provided with a plug 14 and a shorting block 13 disposed at one end of the plug 14. Of course, insulation is provided between the shorting block 13 and the plug 14, that is, an insulating layer is provided between the shorting block 13 and the plug 14. A PIN limiter diode 8 is provided inside the plug 14, and the PIN limiter diode 8 is opposite in direction to the PIN limiter diode 8 inside the primary PIN limiter diode assembly 6. Both ends of the PIN switch diode 17 are connected to the tuning rod 10 through the coupling rod 11.

[0030] That is, the tuning rod 10 connected to the anode end of the PIN limiter diode 8 inside the secondary PIN limiter diode assembly 7 passes through the height-reducing waveguide 4 and is connected to the grounded movable block, and a groove for accommodating the grounded movable block is correspondingly provided on the other side of the height-reducing waveguide 4.

[0031] Meanwhile, the plug 14 of the primary PIN limiter diode assembly 6 is connected to the plug 14 of the secondary PIN limiter diode assembly 7 through the wire 15. Of course, matching rods 16 can also be correspondingly and adaptively provided on both sides of the PIN switch diode 17 and the PIN limiter diode 8 and the PIN switch diode 17.

[0032] See Figure 2 , Figure 2 which gives the circuit schematic diagram of the high-power waveguide limiter.

[0033] In actual operation, when a signal of a certain power is detected, the acceleration switch diode is turned on after detection, which not only improves the power capacity of the limiter, but also reduces the peak leakage and speeds up the recovery time of the limiter.

[0034] The PIN limiter diode 8 of the primary PIN limiter diode assembly 6 and the PIN limiter diode 8 of the secondary PIN limiter diode assembly 7 are connected in a form of one forward and one reverse, which reduces the peak leakage and speeds up the recovery time of the limiter.

[0035] This solution uses a PIN passive limiter. To improve the power capacity, a self-biased limiter circuit can also be used. Different layer thicknesses of PIN diodes are used for stepped matching at different levels, which has a smaller limiting level and a faster recovery time.

[0036] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-power waveguide limiter, characterized in that: It includes a waveguide housing, a rectangular waveguide integrated in the waveguide housing, a coupling and detection device connected to the rectangular waveguide, and a height-reducing waveguide; on the height-reducing waveguide, a PIN switch diode assembly, a first-stage PIN limiter diode assembly, and a second-stage PIN limiter diode assembly are sequentially stacked in a stepped manner, and the PIN limiter diodes in the first-stage PIN limiter diode assembly and the second-stage PIN limiter diode assembly are arranged in opposite directions; The coupling and detection device includes a pair of inner conductors supported by a polytetrafluoroethylene block, and the two ends of the detection diode are connected by a coupling rod; one of the inner conductors is connected to the rectangular waveguide, and the other inner conductor is connected to the short-circuit block of the PIN switch diode assembly through a wire; The PIN switch diode assembly includes a coaxial plug, a short-circuit block provided at one end of the coaxial plug, and the short-circuit block is connected to the coupling and detection device through a wire; a PIN switch diode is provided in the coaxial plug, and the two ends of the PIN switch diode are connected to a tuning rod through a coupling rod; The first-stage PIN limiter diode assembly includes a coaxial plug, a short-circuit block provided at one end of the coaxial plug; a PIN limiter diode is provided in the coaxial plug, and the two ends of the PIN switch diode are connected to a tuning rod through a coupling rod; The second-stage PIN limiter diode assembly includes a coaxial plug, a short-circuit block provided at one end of the coaxial plug; a PIN limiter diode is provided in the coaxial plug, and the PIN limiter diode is in the opposite direction to the PIN limiter diode in the first-stage PIN limiter diode assembly, and the two ends of the PIN switch diode are connected to a tuning rod through a coupling rod, and the coaxial plug of the first-stage PIN limiter diode assembly is connected to the coaxial plug of the second-stage PIN limiter diode assembly through a wire; The coaxial plug of the first-stage PIN limiter diode assembly is connected to the coaxial plug of the second-stage PIN limiter diode assembly through a wire.

2. The high-power waveguide limiter according to claim 1, wherein: The coupling rod connected to the other inner conductor is also connected to a DC loop inductor.

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