Microwave phase manipulator

 

(57) Abstract:

Usage: in electronics as a phase manipulator microwave signal transmitter. The inventive microwave phase manipulator containing the input divider and the output of the adder, between which enabled channels equal electrical length with controllable attenuators, the design of the input divider is made with mirror symmetry output shoulders. This quality has the divider output whose shoulders are made in the form of twisting +90 and -90 for rectangular waveguides, as well as the magnetron with the number of resonators that are multiples of 4, and with two orthogonal planes of symmetry. 2 C.p. f-crystals, 6 ill.

The invention relates to electronics and is aimed at improving devices for phase manipulation signals of the UHF transmitter.

The known device for phase manipulation of the signals, which are intended to generate an appropriate signal (known as a complex signal at the intermediate frequency with the further multiplication or frequency conversion or for the formation of a complex signal for further modulation of the microwave generator. The processes of multiplication, conversion or modulation Priene in phase manipulation. The struggle with the latter is quite complex.

Use as managed elements electrically controlled attenuators (e.g., ferrite) dramatically increases the signal strength. Typically, in such devices is used, the input power divider operating on two channels, and an output adder that combines the signals of these channels. Manipulation (control) is implemented by the attenuators in the channels [1], and the phase shift is achieved by the introduction of the phase-shifting elements [2].

Closest to the present invention is microwave phase manipulator [3], which contains the output of the adder, to the two input shoulders which is connected channels of equal electrical length, in each of which series-connected controlled attenuator, and as the input of the divider is applied to the magnetron with two terminals, a synchronized input signal.

The disadvantage of the prototype, as all mice containing controlled attenuators is not a high precision phase manipulation especially in the frequency band. For example, the phase shift between the individual cells of the vibrating system of the magnetron is guaranteed for only one nondegenerate type of oscillation, provided that coreelements connection with the load (conclusions energy). Introduction recent fixes the rotary axis of symmetry and, therefore, the phase shift can be sustained only approximately.

The aim of the invention is to improve the accuracy of the phase shift (the phase accuracy of the manipulation).

The invention consists in a better use of the electrodynamic properties of the devices, having mirror symmetry plane.

From the point of view of theory of symmetry of the considered device has two private fields. For one field, the ratio of the component at the symmetric points is equal to plus 1, for the other minus 1. This is equivalent to the phase shift of 0 or component fields in symmetric points, in particular the symmetric points selected in the layout area of the conclusions of the energy.

Compared with the prototype of the most significant is that the last property is completed accurately and strictly proved theoretically. The presence of symmetric conclusions energy does not the specified value fields in symmetric points made approximately. Error the specified phase shift in the ideal case equal to zero. Compared to the ideal, in practice it is necessary to consider the difference between the system from symmetric and can be excited in addition to the R marked the phase shift is 0 or . Known circuits adders designed for a phase difference of 0 or on their inputs. If the adder is applied in the phase diagram of the manipulator, this phase difference must be equal to or 0, respectively. The device is a prototype designed only on the phase difference .

In Fig.1 presents a block diagram SHF phase of the manipulator of Fig. 2-4 - divisors with mirror symmetry output shoulders; Fig.5 - input divider in the form of a magnetron of Fig.6 shows a magnetron activated in the device.

Microwave phase manipulator contains the input divider 1, the outputs of which are connected to channels 2 and 3 are equal electrical length, each of which is enabled by controlled attenuator 4 and 5. Through the adder 6 channels 2 and 3 are connected with the load. If the phase manipulation required common-mode signals at the inputs 7 and 8 of the waveguide adder, suitable power splitter shown in Fig.2. The arrows show the direction of force lines of the electric field at a fixed point in time for wave N01rectangular waveguide. In this design there is a mirror plane of symmetry 0-0, which is the electric cooling wall. This divider can be considered LASS="ptx2">

The divider can be made in the form shown in Fig.3, if the phase manipulation required phase difference at the inputs 7 and 8 of the waveguide adder 6. Compared with the divider shown in Fig.2, in this case, the output waveguides are twisted 90aboutpreserving a mirror plane of symmetry 0-0.

The divider can be made in the form shown in Fig.4, if the adder has a coaxial input and they need to get out-of-phase signals. Compared with the divider in Fig.2 there are additional coaxial-waveguide transitions. To obtain in-phase signals have one of the transitions rotate 180aboutaround the axis of the corresponding waveguide (i.e., set to the opposite wall of the waveguide).

In the above examples of possible reflections from discontinuities waveguides (bends, joints), but the phase difference of the signals at the identical characteristics of the inputs of the adder necessarily equal to 0 or in the band of operating frequencies of the waveguide elements. At least the phase-frequency range of additional restrictions not.

The divider can be made in the form of a magnetron with two conclusions energy, the number of resonators that are multiples of 4, and orthogonal planes seminal, synchronizing the magnetron 14 (Fig. 6). The accuracy of the phasing is provided by the arrangement of the conclusions of the energy in the opposite symmetric resonators and excitation only operating mode of the oscillations of a system of electronic spokes (spokes of the electron cloud of the magnetron), symmetric with respect to the Central axis (the line of intersection of the first and second planes of symmetry 0-0 and 1-1 in Fig.5). This axis is projected on the plane of the drawing in the form of a point, which is the center of inversion. It is easy to see that if such an inversion center for the entire structure of the magnetron and electron cloud of the latter excites only one type of oscillations corresponding to the electrical wall in the planes of symmetry. The inversion center has a cloud with an even number of spokes. The number of resonators of the magnetron for the kind of fluctuations should be twice as much, i.e., multiples of 4. For the operating mode of the oscillations of the notion of the form of oscillations becomes approximate, since the phase shift per cell in slowing down the system with the conclusions of the energy is not exactly equal , but the phase difference in the symmetric points is carried out accurately.

Formulated the condition of symmetry of the whole structure of the magnetron applies to Travers mounting cathode (Fig.5 they conventionally Phnom block ligaments are attached at two points 11 and 12, posted on radius. The intersection of the conductors of the ligaments is performed as usual, without galvanic contact between them, for example by bending the conductors at the intersection and their location in this place, at different distances from the slats. Violation of the geometrical symmetry cannot be avoided only at the intersection of the ligaments of the above-mentioned plane of symmetry. This asymmetry is insignificant for the currents on the ligaments and does not violate the symmetry of the field in the interaction region of the electron flow with this field. The latter refers to the possible variations of the location of the loops coaxial conclusions depending on the required with these findings, a phase difference of 0 or . In Fig.5 shows only the waveguide conclusions.

Microwave phase manipulator behaves the same as the prototype.

The signal from the input of the divider is fed into the channels 2 and 3, is equal to the electrical length (Fig.1). With appropriate management of attenuation of the attenuators 4 and 5 variations on the output of the adder 6 are characterized by a two phase States differing to that required for phase manipulation. Dependence coefficient n of the deceleration near the form of oscillations of wavelength can be approximated by the expression

n = 4 - 20, (1) where - Glinka; the phase shift per cell of the unperturbed system; - additional phase shift in the cell under the influence of perturbations (output energy); 2 (/2) - additional phase shift in the two cells adjacent to the cell that has an output energy. The latter is observed in the experiment, the greatest impact of energy extraction on the parameters of the output and its neighboring cells. This effect is taken into account in the linear approximation. The factor 2 before the brackets takes into account the presence of two conclusions energy.

In the absence of perturbation = 0 and = . In the presence of the conclusions of the energy 0 and . Under the influence of a hinge connection with the load is, for example, reducing their own wavelength kinds of fluctuations of 1.5%. The frequency offset under the influence of two loops of communication can be considered to be twice as large as the field structure in the cells are the same, and the offset is determined by the amplitude of the field. Differentiating (1) we have

= 4 = 4(-0,03)= -0,12.

Given that

= +

get

= - = -0,12+0,03= -0,09.

Similarly, differentiating (2), have

N +4 = 0

Hence for jasminesantana magnetron

== - =20,09=of 0.565 (rad.)=32,4< / BR>
The error of the phase manipulation device prototype is evaluated, thus, dozens of whom I (the accuracy of manufacture of the divider). Such error in geometric dimensions can be considered a value at least an order of magnitude lower compared to the output power, and to estimate the error of the phase manipulation proposed device a few degrees.

The specific implementation of the proposed microwave phase manipulator is a standard engineering task of designing microwave devices.

The main effect of using the proposed device is that the use of a sufficiently powerful vibration source (either standard or specially designed symmetrical magnetron with two conclusions energy) to receive the signal with high precision manipulation phase and a sufficiently large capacity. Itself phase shift keying is to manage the attenuation of the attenuators without loss of accuracy.

1. Microwave PHASE MANIPULATOR containing the input divider, the output shoulders which is connected channels of equal electrical length, including controlled attenuators and is connected to the output of the adder, wherein, to improve the accuracy of the phase shift, the design of the input divider is made with mirror symmetry output shoulders.

2. UP> rectangular waveguides.

3. The manipulator under item 1, characterized in that the output divider is made in the form of a magnetron with the number of resonators that are multiples of 4, diametrically opposite cavities located on the first plane of symmetry, are the outputs of the input divider, and the input divider is made with mirror symmetry about a second plane of symmetry orthogonal to the first, with adjacent slats anode block are connected by ligaments, adjacent connection points which are spaced along the radius.

 

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