CN100595594C

CN100595594C - High-power microwave water load

Info

Publication number: CN100595594C
Application number: CN200810100561A
Authority: CN
Inventors: 刘亮; 王茂; 刘甫坤; 单家方; 匡光力
Original assignee: Institute of Plasma Physics of CAS
Current assignee: Institute of Plasma Physics of CAS
Priority date: 2008-05-12
Filing date: 2008-05-12
Publication date: 2010-03-24
Anticipated expiration: 2028-05-12
Also published as: CN101281221A

Abstract

The invention discloses a high-power microwave water load, which includes a small section wave-guide, a transition wave-guide and a large section wave-guide connected in sequence. The invention is characterized in that the large sectional wave-guide end is inclinedly mounted on the right side wall of the high-pressure water tank, ceramic chips are mounted therein, intake channels circulate aroundthe upper and lower lateral walls and rear lateral wall of the high-pressure water tank, inlet openings are open on the upper and lower lateral walls of the high-pressure water tank to communicate with the intake channel, water inlet pipes are communicated with the intake channel on the rear lateral wall of the high-pressure water tank, and outlet pipes are provided on the left lateral wall off the high-pressure water tank. The liquid body current mode adopted by the invention can quickly lead-out the microwave power from the high-pressure water tank, avoids vaporization caused by excessive heating generated in the dead zone with non-smooth current, and can realize high average power, long pulse and high power density microwave matching and power measurement.

Description

High-power microwave water load

Technical field

The invention belongs to microwave technical field, specifically is a kind of high-power microwave water load.

Background technology

Matched load is a kind of port element that can all absorb power input.It is the waveguide or the coaxial cable of a section termination short circuit, wherein is placed with absorbing material.It is commonly used for match-on criterion in microwave measurement; When adjusting instrument and machine (for example television transmitter, broadcast transmitter, radar etc.), utilize it in transmission system, to set up traveling-wave mode, be commonly used for antenna eliminator.Its major technology index is working band, input vswr and power capacity.

Water load is a kind of of matched load, and it is that profit uses water as absorbing material, and by the mobile end device of carrying heat outside of water, temperature raise after the water that flows to absorbed microwave power, can draw measured microwave power value according to the flow of water and the temperature difference of turnover saliva.

Prior art has a kind of water load, by high-pressure water tank and side thereof heavy in section waveguide, transition waceguide, small bore waveguide being installed forms, there is potsherd to separate between heavy in section waveguide and the high-pressure water tank sidewall, high-pressure water tank one side is connected with water inlet pipe, opposite side is equipped with rising pipe, though water energy thermally equivalent in its high-pressure water tank of the water load of this structure, but it is not enough that water body inside is stirred the degree of closing automatically, and can not guarantee has sufficient low temperature current that this a large amount of microwave deposition power in zone is effectively derived in the most key potsherd center.

Summary of the invention

The purpose of this invention is to provide a kind of high-power microwave water load, the water body in the high-pressure water tank can fully stir, and can in time microwave power almost completely be absorbed and derive.

Technical scheme of the present invention is as follows:

High-power microwave water load, include the small bore waveguide, transition waceguide, the heavy in section waveguide that connect successively, it is characterized in that: described heavy in section waveguide end tilts to be installed in the high-pressure water tank right side wall, potsherd is installed between it, be surrounded with intake chamber on the upper and lower sidewall of high-pressure water tank and the rear wall, have inlet opening and intake chamber UNICOM on the upper and lower sidewall of high-pressure water tank, be linked with water inlet pipe on the intake chamber of described high-pressure water tank rear wall, on the left side wall of described high-pressure water tank rising pipe arranged.

Described high-power microwave water load is characterized in that the inlet opening on the upper and lower sidewall of described high-pressure water tank all is symmetrical arranged.

Described high-power microwave water load is characterized in that described potsherd is clipped between heavy in section waveguide end and the high-pressure water tank right side wall, has O-ring seal between potsherd and the high-pressure water tank right flank.

Described high-power microwave water load is characterized in that described potsherd has passed through polishing towards the plane of heavy in section waveguide.

When microwave energy after the waveguide feed-in water load on right side, through the transition waveguide its power density is suitably reduced earlier, with the high-pressure water tank that is positioned at the load rear portion huge power is close to completely then and absorbs, there is a water inlet pipe that deionized water is fed high-pressure water tank simultaneously, on high-pressure water tank, the lower end, symmetry have a circular hole that several directions have nothing in common with each other, after water flows into intake chamber, enter the inlet opening on the high-pressure water tank sidewall, inject high-pressure water tank with very high speed then, flow out from the square exit that is positioned at the casing rear wall again, thereby microwave energy is derived water tank, and the not smooth dead band of avoiding flowing takes place overheated and vaporizes, and can accomplish high-average power, long pulse, high power density microwave matching and power measurement.

The thickness of potsherd and inclination angle need to determine according to coupling, and its plane towards the heavy in section waveguide passed through polishing, in order to reduce the sparking probability.When imposed load on the potsherd is 10 atmospheric pressures, suffered maximum pressure appears at the heavy in section waveguide and supports center, potsherd border on the potsherd, also be in fully in the physical strength scope of potsherd, under so high pressure, the boiling point of water is brought up to 190 ℃, suppose that inflow temperature is 20 ℃, both temperature difference are 170 ℃ of allowed temperature rises that improve water, thereby have improved power capacity greatly.

This high-power water load relates to microwave, fluid dynamics and structural mechanics three aspects, and these three aspects interact, and condition each other, and need take all factors into consideration just to draw best design.The easier device that makes of the potsherd of thin thickness mates in broadband, but its ability of bearing water body pressure in the high-pressure water tank a little less than; And the use of Taper no doubt can reduce Microwave Power Density, but also can make the area of terminal potsherd become big, under the constant situation of thickness, also can impact its ability of bearing pressure.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 distributes near the water velocity vector at the maximum 0.1mm place of potsherd of microwave power deposition.

The inner water body of Fig. 3 high-pressure water tank is along the velocity distribution plan in two cross sections of central axis subdivision.

Fig. 4 high-pressure water tank sectional view.

Embodiment

High-power microwave water load, include the small bore waveguide 2 that connects successively, transition waceguide 3, heavy in section waveguide 4, waveguide 4 sloped-end in heavy in section are installed in high-pressure water tank 7 right side walls, clamped potsherd 5 between it, between potsherd 5 and the big flange 11 O-ring seal 6 is installed, on the high-pressure water tank 7, be surrounded with intake chamber 12 on lower wall and the rear wall, on the high-pressure water tank 7, have inlet opening 10 and intake chamber 12 UNICOMs on the lower wall, be linked with water inlet pipe 8 on the intake chamber 12 of described high-pressure water tank 7 rear walls, rising pipe 9 is arranged on the left side wall of described high-pressure water tank 7.Small bore waveguide 2 ends are connected with flange 1, and potsherd has passed through polishing towards the plane of heavy in section waveguide.

The water velocity vector that microwave power deposits near the 0.1mm place of maximum potsherd distributes, as shown in Figure 2, and its approximate motion state that has characterized near the current of potsherd.

As can be seen from Figure 2: two whirlpools are on two diagonal angles of potsherd, and in this zone, microwave is also little in the power deposition on potsherd surface; And the central area of power deposition maximum, through after the crossing of above-below direction current, rapidly to flowing out perpendicular to potsherd direction direction.

Fig. 3 is the velocity distribution plan of the inner water body of high-pressure water tank along two cross sections of central axis subdivision, as can be seen: the current that penetrate from high-pressure water tank is lateral opening are with after potsherd contacts at a high speed, will heat be taken out of from rising pipe with very high speed, not have flow dead in the inside of water tank.

Fig. 4 is the high-pressure water tank sectional view, at the upper and lower end of high-pressure water tank, symmetry have a circular hole that several directions have nothing in common with each other.

Claims

1. high-power microwave water load, include the small bore waveguide, transition waceguide, the heavy in section waveguide that connect successively, it is characterized in that: described heavy in section waveguide end tilts to be installed in the high-pressure water tank right side wall, potsherd is installed between it, be surrounded with intake chamber on the upper and lower sidewall of high-pressure water tank and the rear wall, have inlet opening and intake chamber UNICOM on the upper and lower sidewall of high-pressure water tank, be linked with water inlet pipe on the intake chamber of described high-pressure water tank rear wall, on the left side wall of described high-pressure water tank rising pipe arranged; Inlet opening on the upper and lower sidewall of described high-pressure water tank all is symmetrical arranged; Described potsherd is clipped between heavy in section waveguide end and the high-pressure water tank right side wall, between potsherd and the high-pressure water tank right flank O-ring seal is arranged; Described potsherd has passed through polishing towards the plane of heavy in section waveguide.