Mnohopocetny open resonator

 

(57) Abstract:

Use: engineering of millimeter and submillimeter ranges. The inventive mnogodolny open cavity contains a first mirror with a generatrix in the form of a system defocusing ellipses and a second mirror with a straight generatrix passing through the foci of the first mirror. The first and second mirrors are made in the form of bodies of rotation around the first and second axes oriented parallel to a rectilinear generatrix profile of the second mirror and located each side opposite the mirror outside the volume enclosed between the first and second mirrors. At the ends of the mirrors installed additional mirror elements, the phase center of which is aligned with the nearest focus of the first mirror and the surface formed by the rotation of their forming around the first axis. 3 C.p. f-crystals, 4 Il.

The invention relates to the field of microwave engineering of millimeter and submillimeter wavelengths, namely resonant systems microwave ranges, and is intended primarily for use in the generator-amplifier devices that use quasi-resonant system.

In the development of some quasi) mnogotochechnymi systems with cascading focusing of microwave energy in local zones of resonance volume - wave tricks of the PR. The presence of such zones can accommodate in-phase resonant field of high intensity, several nonlinear elements and to carry out, for example, in the diffraction radiation generator (GDI) and quasi-optical semiconductor generators resonant sum capacity of multiple microwave sources, which increases the power output of the device as a whole. However, a further increase in output power of such devices is limited by the disadvantages of their PR, having no more than two or three focal zones, which can be placed nonlinear elements. Other known mnogofotonnye patterns have a sufficient number of wave tricks, but do not have the necessary quality. No structures mnogofotonnykh EOS, in which the possible excitation of sustainable good vibrations with a large number of wave tricks, hinders the development of generator devices with high output power. Therefore, the establishment of mnogofotonnykh resonance structures for the generator-amplifier device of the microwave range is an important task which will accelerate the development and creation of new microwave devices, important for the national economy.

Famous outdoor PE the two defocusing ellipses and flat mirror. The disadvantage of this EO is the reduction of the quality factor and the deterioration of the resonance properties when the number of wave foci [1].

Closest to the technical essence and the achieved positive effect to the proposed technical solution is mnogopolnoe quasi-optical device formed by the system defocusing elliptical mirrors and flat - mi mirrors, placed at the foci of the elliptical. In this structure ensures that the concentration phase field of the microwave in a large number of wave focal zones in the propagation of energy along the structure in the forward direction from the focus of the source-to-focus receiver. However, using this structure as a resonance is significantly complicated by the fact that it cannot be repeated cyclic crawls wave (radial) flow stable spatial trajectories passing through the same kind of tricks structure, but in reverse order. It is known that this requirement is necessary for the formation of stable solid oscillations in quasi-resonant structures, as the waves corresponding to the rays, repeatedly synthesis cycle, have enough directory analysis of the process of propagation of rays in mnogofotonnoi the structure of the prototype suggests, after its direct passage with a consistent focus in each peripheral focus of the elliptical mirror forms a reverse energy flow, converging don't end peripheral its focus, and in the interior, previous peripheral (as similar). Since the sizes of all internal elliptical mirrors in the propagation direction does not exceed the focal length 2A (and is the semimajor axis, eccentricity), the angles of arrival in this internal focus "reverse" of the rays relative to the line connecting the foci patterns are such that after reflection from which the focus of flat mirrors of "reverse" rays fall on the inner surface of the elliptical mirror, which this focus does not belong. So subsequent reflections "backward" radiation flows do not converge periodically in each of the focus structure of the prototype, as in case of direct distribution, common in the direction of focus of the source becomes chaotic in nature and occurs along paths that do not contain points of foci patterns and does not substantially coincide with the trajectories of direct distribution. For this reason, in such structures, with a number of tricks p > 3 energy obratny waves does not occur, because of what decreases the quality factor of the oscillations with the wave tricks, relevant geometric tricks structure.

The aim of the invention is to improve the quality mnogofotonnoi quasi-optical structure.

This is achieved by the fact that in Mnogotochie open cavity containing a first mirror with a profile in the form of a system defocusing ellipses and a second mirror with a straight profile, passing through the foci of the first mirror, the mirror is made with surfaces of the rotation profiles respectively around first and second axes oriented parallel to the generatrix of the second mirror and passing each side opposite the mirror outside the scope of the resonator, and at the ends of the latter, outside misfocusing areas, the additional mirror elements with profiles with phase centers. When this surface is introduced mirror elements formed by the rotation of their profiles around the first axis, and themselves, these elements are mounted so that the phase center of each profile combined with its nearest peripheral focus of the profile of the first mirror.

In Mnogotochie open resonator, at least one more is him and perpendicular to the generatrix of the profile of the second mirror.

In addition, at least one additional mirror elements can be made with a profile of an arc of a circle whose center is aligned with the nearest peripheral focus of the first mirror.

For the implementation of frequency tuning one of the additional mirror elements or its part can be mounted for movement along a generatrix of the profile of the second mirror.

Comparative analysis of the prototype and similar shows that the proposed device has new features that build a sustainable good vibrations with a large number of wave tricks. Therefore, it meets the criteria of the invention of "novelty."

Analysis of patent and scientific and technical sources indicates that the distinctive features of the proposed technical solution is not known, indicating its compliance with the criterion of "Significant differences".

In Fig.1-3 depict p-focal PR (p=1,2,3,...), with an additional mirror elements elliptical and linear profile of Fig.4 - 5 - focal PR (p= 5) with an additional mirror elements circular profile.

Direct ray paths (to the left of naprorochili, closed in focus-the source of f1indicated by double arrows.

Mnohopocetny open cavity contains the first mirror 1 profile 2 in the form of a system defocusing ellipses and the second mirror 3 profile 4 in the form of a straight line passing through the foci of the mirror 1. Mirrors 1,3 made with surfaces of the rotation profiles 2, 4 around the respective axes 010'1and 020'2oriented parallel to the generatrix of the profile 4 mirror 3, with both axes are outside the scope of the resonator: the axis 010'1- side mirror 3, and the axis 020'2- side mirror 1. Typical cross-section of the resonator in planes perpendicular to the axes of rotation, shown in Fig.1-3. At the ends of the resonator, outside mezhduvagonnyh areas f1...fpintroduced additional mirror elements 5 profiles 6 with phase centers. The surface of the additional mirror elements 5 are made in the shape of the rotation profiles 6 around the axis 010'1mirror 1, and do additional mirror elements 5 are set so that the phase center of each combined with its nearest peripheral focus f1or fpprofile 2 mirrors 1.

Dopolnitelnye this ellipse and perpendicular to the generatrix of the profile 4 mirror 3 (see Fig.1-3). In addition, the mirror elements 5 can be done with profiles 6 in the form of an arc of a circle (see Fig.4), the center of curvature (phase center) which is combined with a peripheral focus of the profile 2 mirrors 1. You can also use structurally different additional mirror elements 5 in one Mnogotochie OP.

One or both of the additional mirror element 5 can be mounted for movement in the direction of the generatrix of the profile 4 mirrors 3.

Works proposed mnohopocetny the PR as follows. Diverging from the focus of the source of f1the flow of wave energy hits the surface of the mirror 1. One of the beams diverging flow out of focus at some initial angle1nthe profile 4 mirror 3, passes all mnogopikselnoy structure from left to right, sequentially reflected at the points of foci fi(i = 1,2,..., R-1, R) from the mirror 3, because every time he reflected the elliptical portion of the surface of the mirror 1, the focus of which he came. After reflecting mirror 3 in the peripheral focus fpmirror 1 beam hits the surface of the right mirror element 5, the phase center of the profile 6 which are aligned with Penta beam changes the direction of propagation in the structure on the back so, which again falls into the same peripheral focus fpmirror 1, because it combined the phase center for the mirror element 5. After reflection from the mirror 3 in the focus fpthe return beam falls on the peripheral surface of the elliptic section of the mirror 1, which belongs to the focus fp. This elliptical section of the beam is reflected in the focus fp-1on the surface of the mirror 3, and then, alternately reflected from the elliptical mirror surfaces 1 and tricks on the surface of the mirror 3, the beam in the reverse sequence passes all the tricks mnogofotonnoi patterns. After reflection from the mirror 3 in the focus point f1the beam hits the surface of the left additional mirror element 5, the phase center of which is aligned with the left peripheral focus f1mirror 1. Similarly, the right-left mirror element 5 changes the propagation direction of the beam so that it again passes through its phase center - focus f1mirror 1, and the angle1tojoining him in the point f1is associated with an initial angle1nexit it from the same point at the beginning of the cycle ratio1to= 180about-1n(justice the C point f1corresponding to the beginning of the second cycle traversal patterns, occurs at an angle2n=1nand for an arbitrary number n of cycles of crawling identity n+1n=nn.

Thus, the cyclic path of each beam geocentricism beam characterizing the pattern (DN) of the excitation source, samovosproizvoditsja in each cyclic traversal mnogofotonnoi patterns of this type, which gives it stability and provides a concentration of wave energy in all its tricks. Multiple rounds of such structure on the stable spatial trajectories and provides multiple interference wave flows on significant parts of the spatial-developed circular trajectory that determines the increase of the quality factor of the structure and thereby the possibility of using it as a resonance with a large number of wave tricks. The reduction of losses in the plane perpendicular to the plane of the profile mirror 1, is provided by the introduction in this direction quadratic phase correction by performing surface mirrors 1.3 in the form of rotation about their respective axes located on the profile of the ellipse and straight, combined with its minor axis and perpendicular to the line of profile 4 mirror 3 (see Fig.1-3) reflected elliptical surface element 5, the beam moves to its second focus (right cross). His coming in this focus prevents the mirror 7, straight profile, part of the General profile 6 additional mirror element 5, is aligned with the minor axis of the elliptical part of the profile of the element 5. Since the minor axis of the ellipse has its axis of mirror symmetry, then reflected by the mirror 7, the beam comes to the internal focus of the elliptical arc element 5 - phase cents last, combined with peripheral focus fpmnogofotonnoi patterns. After reflection from the mirror 3 in the focus fpray in reverse sequence passes all the tricks of the structure. Similarly, there are multiple reflections of the beam at the end of the cycle on the left additional mirror element 5.

When performing additional mirror elements (or at least one of them) with a profile in the form of an arc of a circle (see Fig.2), the center of curvature of which (phase center) combined with peripheral focus mnogofotonnoi patterns which, for example, from the focus f5the beam is reflected by the surface of the right element 5 is on the opposite trajectory, coinciding with a straight trajectory, falls on the surface of the left mirror element 5, which similarly changes the propagation direction and comes into focus is the source of f1. The second and all subsequent cycles of reflections of the beam also occur along paths that coincide spatially with the trajectory of the first cycle, since the conditionn+1n=nn. Therefore, in Mnogotochie HOR, in which additional mirror elements have a profile of an arc of a circle, formed good vibrations with wave tricks all geometric points of structure.

Frequency adjustment in the proposed Mnogotochie'OR, in addition to the known method of changing the distance between the mirrors 1 and 3, may also be moving additional mirror element or part in the direction of the generatrix of the profile 4 mirrors 3, because this changes the length of the circular trajectory. For option PR Fig.1 frequency tuning should be performed by the moving mirror 7 relative to the elliptic part of the element 5, as the latter is technologically easier to make simultaneously with elliptical mirror surfaces 1.

1. MNOHOPOCETNY OPEN CAVITY containing a first mirror with a generatrix in the form of a system defocusing ellipses and a second mirror with a straight generatrix passing through the foci of the first mirror, wherein, to improve the figure of merit, first and second mirrors are made in the form of bodies of rotation around the first and second axes oriented parallel to a rectilinear generatrix profile of the second mirror and located each side opposite the mirror outside the volume enclosed between the first and second mirrors, and to the ends of the mirrors installed additional mirror elements, the phase center of which is aligned with the nearest focus of the first mirror, and the surface formed by the rotation of their forming around the first axis.

2. The resonator under item 1, characterized in that at least one of the additional pendicular generatrix of the second mirror.

3. The resonator under item 1, characterized in that at least one additional mirror elements has a generatrix in the form of an arc of a circle, the center of curvature of which is combined with the nearest to it is the focus of the first mirror.

4. The resonator on the PP.1 to 3, characterized in that order of frequency adjustment, at least one additional mirror elements or a part mounted for movement along a rectilinear generatrix of the second mirror.

 

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