CN109755708B - Millimeter wave terahertz quasi-optical beam power synthesis system based on reflection array - Google Patents
Millimeter wave terahertz quasi-optical beam power synthesis system based on reflection array Download PDFInfo
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Abstract
The invention discloses a millimeter wave terahertz quasi-optical beam power synthesis system based on a reflection array, which comprises a Gaussian beam radiation horn array, an ellipsoidal reflector array, a reflection array plate and Gaussian beam receiving horns, wherein coherent electromagnetic waves emitted from a frequency signal source are radiated to form a plurality of Gaussian beams through the radiation horn array, the Gaussian beams are reflected to the reflection array plate through the ellipsoidal reflector array, and the Gaussian beams are directly synthesized through the reflection array plate. The beam power synthesis structure can synthesize up to 12 paths of signals in one step, has the advantages of simple structure, small insertion loss, high bearing power and good stability, can expand to realize power synthesis of more channels, and has high application value in practical engineering application.
Description
Technical Field
The invention relates to the field of reflector array near-field beam forming and millimeter wave terahertz quasi-optical power synthesis, in particular to a reflector array-based millimeter wave terahertz quasi-optical beam power synthesis technology.
Background
In recent years, the technology of the reflectarray has made great progress in the field of millimeter wave terahertz antennas, and can realize the performances of high gain, high efficiency, beam scanning and the like. Meanwhile, a certain breakthrough is made in the aspect of realizing near-field beam forming through the reflection array, especially, many experts at home and abroad make beneficial work on the research of Bessel beams, and the research on the aspect of realizing Gaussian beam forming and power synthesis through the reflection array is less.
In the microwave and millimeter wave frequency band, the power synthesis technology has been extensively studied, and although the technologies have differences, the technologies have a common point that various traditional transmission line structures are used for realizing power synthesis and amplification. In a terahertz frequency band, the waveguide loss is large, and most of the synthesized power is lost; microstrip and other transmission lines have larger loss and cannot be used in a power synthesis circuit. And as the number of devices being combined increases, the circuit length, nodes and losses all increase and eventually offset the advantages of power combining. The higher the frequency, the greater the number of devices, and the greater the loss of the transmission line. According to the analysis of foreign scholars, for the traditional synthesis mode, the output power of the 15-device synthesis and the output power of the 30-device synthesis are the same at 94 GHz. The quasi-optical technology utilizes the characteristic that Gaussian beams are not lost in space bunching and propagation, has the advantage of much smaller loss than a conventional transmission line, and has obvious superiority when being used for terahertz power synthesis. In the terahertz frequency band, the higher the frequency and the shorter the wavelength, the smaller the corresponding quasi-optical power synthesis system is, and the number of channels synthesized at one stage of the system can be from 4 to 12, so that the synthesis efficiency is not reduced along with the increase of the number of channels, and the power synthesis with any number of channels can be realized by continuously expanding upwards.
The invention has the unique characteristics that the quasi-optical technology is combined with the reflection array, and a plurality of beams are directly synthesized into one Gaussian beam through the reflection array by utilizing the advantages of no loss of beam bunching propagation of the Gaussian beam in the space and basic total reflection of a reflection array plate, wherein the beam can be used in a quasi-optical system, and can also be converted into electromagnetic waves in other modes by using a Gaussian beam receiving loudspeaker; or approximately synthesizing a beam after being reflected by a reflecting mirror and then forming a Gaussian beam by a forming receiving horn. The system can realize power synthesis of any number of channels, the efficiency of first-stage synthesis of the system cannot be reduced along with the increase of the number of the channels, and the system has important application value in the millimeter wave terahertz field.
Disclosure of Invention
The invention aims to realize a millimeter wave terahertz wave beam power synthesis system which is low in loss, good in stability, simple in structure and convenient for engineering application.
In order to achieve the purpose, the invention adopts the following technical scheme:
the millimeter wave terahertz wave beam power synthesis system comprises a Gaussian beam radiation horn array, an ellipsoid reflecting mirror array, a reflecting array plate or a reflecting mirror and a receiving horn. Coherent electromagnetic waves emitted from a frequency signal source radiate a plurality of Gaussian beams through a Gaussian beam radiation horn array, the Gaussian beams are reflected to a reflection array plate through an ellipsoidal reflector array, and a Gaussian beam is directly synthesized through the reflection array plate and can be directly used for a quasi-optical system or can be converted into a waveguide mode by using a Gaussian beam receiving horn; or coherent electromagnetic waves emitted from a frequency signal source are converted into a plurality of Gaussian beams through a Gaussian beam radiation loudspeaker, are reflected to a parabolic reflector or a hyperbolic reflector through an ellipsoidal reflector array, are approximately synthesized into a beam after being reflected by the parabolic reflector or the hyperbolic reflector, and are converted into the Gaussian beams through a synthesized beam receiving loudspeaker to be received.
Furthermore, the Gaussian beam radiation horn is in a shaped horn form;
furthermore, the reflection array plate comprises a plurality of phase-shifting units, a single-layer medium substrate and a metal bottom plate;
furthermore, the phase shift units are periodically arranged on the medium substrate at equal intervals;
furthermore, the metal bottom plate is arranged on the bottom surface of the single-layer medium substrate;
further, the reflector is in the form of a parabolic reflector or a hyperboloid reflector;
furthermore, the Gaussian beam receiving horn is in a shaped horn form;
furthermore, the synthesized beam receiving horn is in the form of a shaped horn.
The invention discloses a millimeter wave terahertz quasi-optical beam power synthesis system based on a reflection array, which has the following beneficial effects compared with the prior art:
1) the synthesis efficiency is high and the loss is low; the invention utilizes the characteristics of Gaussian beam bunching propagation in space and the basic total reflection of the reflection array plate or the reflector, uses the reflection array or the reflector to directly synthesize a plurality of beams into one beam, avoids the loss caused by the discontinuity of a transmission line in a power synthesis system formed by the traditional wave guide structure, and has lower loss compared with the power synthesis in the transmission line wave guide mode.
2) The power capacity is high, the number of channels synthesized in the first stage can reach 12, the power of hundreds of watts can be synthesized at one time, and the power capacity is far beyond the first stage synthesized power capacity in the traditional power synthesis structure.
3) The system stability is high; in millimeter wave and terahertz frequency bands, because the wavelength is much shorter than that of microwaves, the size of a transmission line structure is sharply reduced, so that the processing and assembly are difficult, and particularly for tolerance sensitive devices, small deviation can cause strong change of performance; in the invention, a Gaussian beam is directly synthesized by the reflection array plate consisting of a large number of discrete units, and the influence of small deviation on the final synthesis effect is greatly reduced.
4) Any number of paths can be synthesized; the invention can realize the synthesis of the input of the number of 12 paths by the first-stage synthesis by increasing the number of Gaussian beam radiation horns and corresponding ellipsoidal mirrors and adjusting the distribution of discrete units on a reflection array plate or adjusting the parameters of hyperbolic (parabolic) reflectors, and along with the increase of frequency and the same space structure size, the number of paths of the first-stage synthesis can also be increased, and the synthesis efficiency of the invention can not be reduced along with the increase of the number of channels.
5) Universality: the terahertz frequency band synthesis method can be applied to various frequency bands from millimeter bands to terahertz frequency bands, and has obvious superiority in terahertz power synthesis. In the terahertz frequency band, the higher the frequency and the shorter the wavelength, the smaller the corresponding quasi-optical power synthesis system is, and the synthesis effect is not reduced.
6) Simple structure, processing is easy: the Gaussian beam radiation horn and the receiving horn in the invention both use the shaping horn which is easy to process and low in cost, and replace the corrugated horn which is complex to process and high in cost; the core component reflective array plate may be implemented using a PCB printing or photolithography process.
Drawings
FIG. 1 is a schematic structural diagram of a millimeter wave terahertz quasi-optical four-channel beam power synthesis system based on a reflection array in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a millimeter wave terahertz quasi-optical four-channel beam power synthesis system based on a reflection array in the embodiment of the present invention;
FIG. 3 is a schematic diagram of a Gaussian beam radiation horn in a millimeter wave terahertz quasi-optical beam power synthesis system based on a reflection array according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an ellipsoidal mirror design in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a reflection array plate in a millimeter wave terahertz quasi-optical four-channel beam power synthesis system based on a reflection array in the embodiment of the present invention;
FIG. 6 is a schematic diagram of a Gaussian beam receiving horn in the millimeter wave terahertz quasi-optical beam power synthesis system based on the reflective array according to the embodiment of the present invention;
FIG. 7 is a schematic diagram of a synthesized beam receiving horn in a millimeter wave terahertz quasi-optical beam power synthesis system based on a reflection array according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a millimeter wave terahertz quasi-optical four-channel beam power synthesis system (without a receiving horn) based on a reflective array according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a millimeter wave terahertz quasi-optical nine-channel beam power synthesis system based on a reflective array in an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a millimeter wave terahertz quasi-optical twelve-channel beam power synthesis system based on a reflection array in an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a hyperboloid mirror-based millimeter wave terahertz quasi-optical eight-channel beam power synthesis system in an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a millimeter wave terahertz quasi-optical twelve-channel beam power synthesis system based on a parabolic mirror in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further described with reference to the following detailed description and accompanying drawings.
A millimeter wave terahertz quasi-optical beam power synthesis system based on a reflection array, as shown in fig. 1 and 2, includes: n (N =2, 3, 4, 5 …) gaussian beam radiating horns 1, ellipsoidal mirror arrays 2, reflective array panels or mirrors 3 and receiving horns 4; the N Gaussian beam radiating horns are positioned on a circumference C1 and are uniformly distributed, the N ellipsoidal reflectors are aligned with the corresponding Gaussian beam radiating horns one by one, the reflection array plate or the reflectors are positioned at the center of the whole system, the central axis is superposed with the central axis of the circumference C1, the receiving horn is arranged at a distance right in front of the reflection array plate or the reflectors, and the whole system structure is rotationally symmetrical. Coherent electromagnetic waves emitted by a frequency signal source radiate a plurality of Gaussian beams through a Gaussian beam radiation horn array, the Gaussian beams are reflected to a reflection array plate through an ellipsoidal reflector array, and a Gaussian beam is directly synthesized through the reflection array plate and can be directly used for a quasi-optical system or can be converted into a waveguide mode by using a Gaussian beam receiving horn; or coherent electromagnetic waves emitted from a frequency signal source are converted into a plurality of Gaussian beams through a Gaussian beam radiation loudspeaker, are reflected to a parabolic reflector or a hyperbolic reflector through an ellipsoidal reflector array, are approximately synthesized into a beam after being reflected by the parabolic reflector or the hyperbolic reflector, and are converted into the Gaussian beams through a synthesized beam receiving loudspeaker to be received. In this embodiment:
the number N of the Gaussian beam radiation horns 1 can be selected to be an integer larger than 2 at will, the Gaussian beam radiation horns are in a shaped horn form, and the shaped horn mouths face the ellipsoidal mirror array 2 and are aligned with the ellipsoidal mirrors one by one; the reflection array plate 3 comprises a plurality of phase shift units, a single-layer medium substrate and a metal bottom plate, and the reflector 3 is a hyperboloid reflector or a paraboloid reflector; the receiving horn 4 is in the form of a shaped horn.
Taking a 4-path power synthesis system as an example for explanation, the system structure is shown in fig. 1, a schematic diagram is shown in fig. 2, and a region I in fig. 2 is a gaussian beam radiation horn for converting each path of electromagnetic power signals to be synthesized into a gaussian beam and a corresponding ellipsoidal mirror; the area II is a reflection array plate or a reflector; and the area III is a shaped horn for receiving the synthetic power and testing the size of the synthetic power.
The main design steps of the power combining system in fig. 1 are illustrated as follows:
1. a Gaussian beam radiating horn; the Gaussian beam radiation horn is in a shaped horn form and is used for converting electromagnetic waves in the waveguide into the Gaussian beam form, the beam waist is arranged in the horn, and the size of the horn is selected to enable the beam waist size to be larger than the working wavelength, so that the Gaussian beam can be stably propagated in the air.
2. An ellipsoidal mirror array; reflection type devices are widely used, reflection type devices have no dielectric loss and small conductor loss, and particularly for quasi-optical beam transformation systems with high power efficiency requirements, among the reflection type devices, due to good beam control characteristics and no phase difference characteristics, ellipsoidal reflectors are most commonly used, and a gaussian beam radiated by a gaussian beam radiation horn enters from one focus of an ellipsoidal mirror and exits from the other focus after being reflected by the ellipsoidal mirror.
3. A reflective array plate; the reflection array plate, as shown in fig. 5, includes a plurality of phase shift units, a single-layer dielectric substrate and a metal bottom plate, the phase shift units include a pair of circular and annular patches which are concentrically nested together, all the phase shift units are periodically arranged on the dielectric substrate at equal intervals, and the metal bottom plate is disposed on the bottom surface of the single-layer dielectric substrate.
In the invention, a plurality of convergent beams reflected by the ellipsoidal mirror are shaped into a Gaussian beam by the reflection array plate. The phase response of the corresponding point is changed through the specific reflection unit, so that the electric field distribution in a certain area is changed, the electric field distribution is made to accord with the phase distribution of the Gaussian beam to be obtained, and the purpose of Gaussian beam forming is achieved.
The specific design steps of the reflection array plate in the invention are as follows:
(1) Extracting the phase distribution of scattered waves after a plurality of Gaussian beams reflected to the reflection array plate by the ellipsoidal mirror are overlapped;
(2) Calculating the radiation field phase of a specific ideal Gaussian beam on a designated reference surface;
(3) Uniformly compensating the phase of the incident field on each unit obtained by the calculation in the first step into the phase of the Gaussian beam at the corresponding unit obtained in the second step, wherein each unit provides a phase shift quantity;
(4) After the phase compensation of the third step, the phase of the incident field at each unit meets the phase condition of the Gaussian beam, and the effect of Gaussian beam forming can be achieved.
4. The reflecting mirror has two forms of a hyperbolic reflecting mirror and a parabolic reflecting mirror, in a system of the hyperbolic reflecting mirror form, the hyperbolic reflecting surface is arranged at the central position of the whole synthesis network, the mutual coincidence of an imaginary focus of the hyperbolic reflecting surface and the other focus of a preceding stage ellipsoid reflecting surface is ensured, a wave beam reflected by the preceding stage ellipsoid reflecting surface is transmitted to the direction of the imaginary focus of the hyperbolic reflecting surface as a secondary incident wave beam, and according to the light path propagation characteristics of the ellipsoid reflecting surface and the hyperbolic reflecting surface, the position setting can ensure that each finally reflected wave beam is converged at the real focus position of the hyperbolic reflecting surface, and finally, the wave beams are interfered to form a wave beam. In the system in the form of the parabolic reflector, the parabolic reflector is arranged at the central position of the whole synthesis network, the focus of the parabolic reflector is ensured to be coincident with the other focus of the ellipsoidal reflector in the preceding Gaussian beam conversion module, the beam reflected by the ellipsoidal reflector is transmitted to the focus direction of the parabolic reflector as a secondary incident beam, and according to the light path propagation characteristics of the ellipsoidal reflector and the parabolic reflector, the position setting can ensure that each finally reflected beam is emitted along the direction parallel to the central axis of the paraboloid, and finally a plurality of beams are coherently synthesized into one beam.
5. The receiving horn comprises a Gaussian beam receiving horn and a synthesized beam receiving horn; the receiving horn has high receiving efficiency, simple structure and easy processing; the concrete structure is shown in fig. 6 and 7.
Example 1:
a millimeter wave terahertz quasi-optical four-channel beam power synthesis system based on a reflection array is shown in fig. 1, and includes 4 gaussian beam radiation horns and 4 ellipsoidal mirrors, that is: a first radiation horn 11, a second radiation horn 12, a third radiation horn 13, and a fourth radiation horn 14; the device comprises a first ellipsoidal reflector 21, a second ellipsoidal reflector 22, a third ellipsoidal reflector 23, a fourth ellipsoidal reflector 24, a reflection array plate 3 and a Gaussian beam receiving loudspeaker 4. Firstly, 4 Gaussian beam radiation horns are uniformly distributed on a circumference and are horizontally aligned with the ellipsoidal reflectors one by one; then placing the designed reflection array plate at the center of the system; and finally, placing a receiving loudspeaker at a certain distance in front of the reflection array plate. The power signal source to be synthesized is connected with a Gaussian beam radiation horn to be radiated into a Gaussian beam, a plurality of beams are directly converged in the air after being reflected by an ellipsoid, and are directly converted into the Gaussian beam by a reflection array plate, and the synthesized power is received and tested by using the Gaussian beam receiving horn.
Example 2:
a millimeter wave terahertz quasi-optical four-channel beam power synthesis system based on a reflection array is shown in fig. 8, and includes 4 gaussian beam radiation horns and 4 ellipsoidal mirrors, that is: a first radiation horn 11, a second radiation horn 12, a third radiation horn 13, and a fourth radiation horn 14; the device comprises a first ellipsoidal reflector 21, a second ellipsoidal reflector 22, a third ellipsoidal reflector 23, a fourth ellipsoidal reflector 24 and a reflection array plate 3. Firstly, 4 Gaussian beam radiation horns are uniformly distributed on a circumference and are horizontally aligned with the ellipsoidal reflectors one by one; then placing the designed reflection array plate at the center of the system; the power signal source to be synthesized is connected with a Gaussian beam radiation horn to be radiated into a Gaussian beam, a plurality of beams are directly converged in the air after being reflected by an ellipsoid mirror and are directly converted into the Gaussian beam by a reflection array plate, and the Gaussian beam can be directly used in a subsequent quasi-optical system.
Example 3:
a millimeter wave terahertz quasi-optical nine-channel beam power synthesis system based on a reflectarray is shown in fig. 9, and includes 9 gaussian beam radiation horns and 9 ellipsoidal mirrors, that is: a first radiation horn 11, a second radiation horn 12, a third radiation horn 13, a fourth radiation horn 14, a fifth radiation horn 15, a sixth radiation horn 16, a seventh radiation horn 17, an eighth radiation horn 18, and a ninth radiation horn 19; the device comprises a first ellipsoidal reflector 21, a second ellipsoidal reflector 22, a third ellipsoidal reflector 23, a fourth ellipsoidal reflector 24, a fifth ellipsoidal reflector 25, a sixth ellipsoidal reflector 26, a seventh ellipsoidal reflector 27, an eighth ellipsoidal reflector 28, a ninth ellipsoidal reflector 29, a reflection array plate 3 and a Gaussian beam receiving horn 4. Firstly, uniformly distributing 9 Gaussian beam radiation horns on a circumference, and horizontally aligning the Gaussian beam radiation horns with the ellipsoidal reflectors one by one; then placing the designed reflection array plate at the center of the system; and finally, placing a receiving loudspeaker at a certain distance in front of the reflection array plate. The power signal source to be synthesized is connected with a Gaussian beam radiation horn to be radiated into a Gaussian beam, a plurality of beams are directly converged in the air after being reflected by an ellipsoid, and are directly converted into the Gaussian beam by a reflection array plate, and the synthesized power is received and tested by using the Gaussian beam receiving horn.
Example 4:
a millimeter wave terahertz quasi-optical twelve-channel beam power synthesis system based on a reflection array is shown in fig. 10, and includes 12 gaussian beam radiation horns and 12 ellipsoidal mirrors, that is: a first radiation horn 11, a second radiation horn 12, a third radiation horn 13, a fourth radiation horn 14, a fifth radiation horn 15, a sixth radiation horn 16, a seventh radiation horn 17, an eighth radiation horn 18, a ninth radiation horn 19, a tenth radiation horn 110, an eleventh radiation horn 111, and a twelfth radiation horn 112; the device comprises a first ellipsoidal reflector 21, a second ellipsoidal reflector 22, a third ellipsoidal reflector 23, a fourth ellipsoidal reflector 24, a fifth ellipsoidal reflector 25, a sixth ellipsoidal reflector 26, a seventh ellipsoidal reflector 27, an eighth ellipsoidal reflector 28, a ninth ellipsoidal reflector 29, a tenth ellipsoidal reflector 210, an eleventh ellipsoidal reflector 211, a twelfth ellipsoidal reflector 212, a reflection array plate 3 and a Gaussian beam receiving horn 4. Firstly, uniformly distributing 12 Gaussian beam radiation horns on a circumference, and horizontally aligning the 12 Gaussian beam radiation horns with the ellipsoidal reflectors one by one; then placing the designed reflection array plate at the center of the system; and finally, placing a receiving loudspeaker at a certain distance in front of the reflection array plate. The power signal source to be synthesized is connected with a Gaussian beam radiation horn to be radiated into a Gaussian beam, a plurality of beams are directly converged in the air after being reflected by an ellipsoid, and are directly converted into the Gaussian beam by a reflection array plate, and the synthesized power is received and tested by using the Gaussian beam receiving horn.
Example 5:
a hyperbolic mirror-based millimeter wave terahertz quasi-optical eight-channel beam power synthesis system is shown in fig. 11, and includes 8 gaussian beam radiation horns and 8 ellipsoidal mirrors, that is: a first radiation horn 11, a second radiation horn 12, a third radiation horn 13, a fourth radiation horn 14, a fifth radiation horn 15, a sixth radiation horn 16, a seventh radiation horn 17, and an eighth radiation horn 18; a first ellipsoidal reflector 21, a second ellipsoidal reflector 22, a third ellipsoidal reflector 23, a fourth ellipsoidal reflector 24, a fifth ellipsoidal reflector 25, a sixth ellipsoidal reflector 26, a seventh ellipsoidal reflector 27, an eighth ellipsoidal reflector 28, a hyperbolic reflector 3, and a synthetic beam receiving horn 4. Firstly, 8 Gaussian beam radiation horns are uniformly distributed on a circumference and are horizontally aligned with the ellipsoidal reflectors one by one; then the designed hyperbolic reflector is placed at the center of the system, the virtual focus of the hyperbolic reflector is ensured to be overlapped with the other focus of the preceding stage ellipsoid reflector, the wave beam reflected by the preceding stage ellipsoid mirror is transmitted to the direction of the virtual focus of the hyperbolic reflector as a secondary incident wave beam, and finally a receiving horn is placed at a certain distance in front of the hyperbolic reflector. The power signal source to be synthesized is connected with a Gaussian beam radiation horn to be radiated into a Gaussian beam, each beam reflected by the hyperbolic reflector by the power signal carried by the Gaussian beam is converged at the real focus position of the hyperbolic reflector to approximately synthesize a beam, and then the synthesized beam receiving horn is used for forming the Gaussian beam.
Example 6:
a millimeter wave terahertz quasi-optical twelve-channel beam power synthesis system based on a parabolic mirror is shown in fig. 12, and includes 12 gaussian beam radiation horns and 12 ellipsoidal mirrors, that is: a first radiation horn 11, a second radiation horn 12, a third radiation horn 13, a fourth radiation horn 14, a fifth radiation horn 15, a sixth radiation horn 16, a seventh radiation horn 17, an eighth radiation horn 18, a ninth radiation horn 19, a tenth radiation horn 110, an eleventh radiation horn 111, and a twelfth radiation horn 112; the device comprises a first ellipsoidal reflector 21, a second ellipsoidal reflector 22, a third ellipsoidal reflector 23, a fourth ellipsoidal reflector 24, a fifth ellipsoidal reflector 25, a sixth ellipsoidal reflector 26, a seventh ellipsoidal reflector 27, an eighth ellipsoidal reflector 28, a ninth ellipsoidal reflector 29, a tenth ellipsoidal reflector 210, an eleventh ellipsoidal reflector 211, a twelfth ellipsoidal reflector 212, a parabolic reflector 3 and a Gaussian beam receiving horn 4. Firstly, uniformly distributing 12 Gaussian beam radiation horns on a circumference, and horizontally aligning the 12 Gaussian beam radiation horns with the ellipsoidal reflectors one by one; then placing the designed parabolic reflector at the center of the system; and the focus of the parabolic reflecting surface is ensured to be superposed with the other focus of the front ellipsoidal reflecting surface, the beam reflected by the ellipsoidal mirror surface is transmitted to the focus direction of the parabolic reflecting surface as a secondary incident beam, and finally a receiving horn is arranged at a certain distance in front of the parabolic reflecting mirror. A frequency signal source is connected with a Gaussian beam radiation horn to be radiated into a Gaussian beam, power signals carried by the Gaussian beam are emitted along the direction parallel to the central axis of the paraboloid through each beam reflected by the parabolic mirror, finally, a plurality of beams are combined into one beam in a coherent and approximate mode, and then the synthesized beam receiving horn is used for forming the Gaussian beam.
Claims (6)
1. A millimeter wave terahertz quasi-optical beam power synthesis system based on a reflection array is characterized in that: the device comprises N Gaussian beam radiation horns (1), N ellipsoidal reflectors (2), a reflection array plate or reflector (3) and a receiving horn (4), wherein N =2, 3, 4, 5, …; the N Gaussian beam radiation horns (1) are positioned on a circumference C1 and are uniformly distributed, the N ellipsoidal reflectors (2) are positioned right in front of the corresponding Gaussian beam radiation horns and are aligned with the Gaussian beam radiation horns one by one, the reflection array plate or the reflector (3) is positioned in the middle of the whole system, the central axis is superposed with the central axis of the circumference C1, the receiving horn (4) is positioned at a distance right in front of the reflection array plate or the reflector (3), and the structure of the whole system is rotationally symmetrical;
coherent electromagnetic waves emitted from a frequency signal source radiate a plurality of Gaussian beams through a Gaussian beam radiation horn array (1), are reflected to a reflection array plate (3) through an ellipsoidal reflector array (2), are directly synthesized into a Gaussian beam through the reflection array plate (3), and are finally received by a Gaussian beam receiving horn (4);
coherent electromagnetic waves emitted from a frequency signal source are converted into a plurality of Gaussian beams through a Gaussian beam radiation horn array (1), the Gaussian beams are reflected to a parabolic reflector or a hyperbolic reflector (3) through an ellipsoidal reflector array (2), the beams are approximately synthesized into one beam after being reflected by the reflector (3), and then the synthesized beam receiving horn (4) is used for forming the Gaussian beams and receiving the Gaussian beams.
2. The millimeter wave terahertz quasi-optical beam power synthesis system based on the reflect array of claim 1, wherein: the Gaussian beam radiation horn (1) is in a shaped horn form.
3. The millimeter wave terahertz quasi-optical beam power synthesis system based on the reflection array as claimed in claim 1 or 2, wherein: the Gaussian beam radiation horns (1) face the ellipsoidal reflecting mirror surface (2) and are aligned one by one.
4. The millimeter wave terahertz quasi-optical beam power synthesis system based on the reflect array of claim 1, wherein: the reflection array plate (3) comprises a plurality of phase-shifting units, a single-layer medium substrate and a metal bottom plate, wherein the phase-shifting units comprise a pair of circular patches and circular patches which are nested together at a concentric position, all the phase-shifting units are periodically arranged on the medium substrate at equal intervals, and the metal bottom plate is arranged on the bottom surface of the single-layer medium substrate.
5. The millimeter wave terahertz quasi-optical beam power synthesis system based on the reflect array of claim 1, wherein: the reflector (3) is a paraboloid reflector or a hyperboloid reflector.
6. The millimeter wave terahertz quasi-optical beam power synthesis system based on the reflect array of claim 1, wherein: the receiving horn (4) is in a shaped horn form.
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| CN103078162A (en) * | 2013-01-11 | 2013-05-01 | 东南大学 | MMW (millimeter waves) terahertz quasi optical beam power synthesis network |
| CN103762423A (en) * | 2014-01-24 | 2014-04-30 | 中国科学院光电技术研究所 | Reflection array antenna beam scanning antenna based on rotation phase shift surface technology |
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| CN103078162A (en) * | 2013-01-11 | 2013-05-01 | 东南大学 | MMW (millimeter waves) terahertz quasi optical beam power synthesis network |
| CN103762423A (en) * | 2014-01-24 | 2014-04-30 | 中国科学院光电技术研究所 | Reflection array antenna beam scanning antenna based on rotation phase shift surface technology |
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