CN107248619A - A kind of single groove depth C/Ku two-bands differential mode tracking feed and its design method - Google Patents
A kind of single groove depth C/Ku two-bands differential mode tracking feed and its design method Download PDFInfo
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- H—ELECTRICITY
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- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
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- H—ELECTRICITY
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
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Abstract
The invention discloses a kind of single groove depth C/Ku two-bands differential mode tracking feed, belong to communication antenna technical field.Feed of the present invention includes single slot structure corrugated horn and differential mode feeder line synthesis network, single slot structure corrugated horn is made up of changeover portion, modular transformation section, change frequency range, angular-varying section and radiant section, the single slot structure form for becoming frequency range to be made up of multiple groove cycles, the angle for locating uniformly to offer successively on the circumference of corresponding corrugated horn in an anterior groove cycle of angular-varying section between first to the 8th totally eight coupling apertures, two neighboring coupling aperture is 45 degree.The present invention can realize that two-band communication, two-band single-pulse track and two-band are shared, have the advantages that directional diagram is rotationally symmetrical, sidelobe level is low, reflection loss is small, high gain, poor directional diagram it is rotationally symmetrical.
Description
Technical Field
The invention relates to the technical field of communication antennas, in particular to a single-groove-depth C/Ku dual-band differential mode tracking feed source and a design method thereof.
Background
With the development of society, the demand for satellite communication is rapidly increased, and the navigation measurement and control technology is rapidly developed, in order to improve the utilization rate of satellite resources, more and more satellite operating frequency bands are developed into dual-frequency and multi-frequency bands, for example, the dual-frequency satellites such as C/Ku, L/C, S/C, X/Ka and S/X which are used more at present are developed into the multi-frequency bands, which is a great trend in the future. The satellite ground station antenna system also has the advantages of keeping up with the increasing demand of satellite communication traffic, increasing the communication capacity of the satellite ground station antenna and improving the utilization rate of the satellite ground station antenna. The antenna for the satellite ground station can work on two frequency bands or more frequency bands simultaneously. In order to improve the utilization rate of resources, the requirement of a large-caliber ground station antenna for working above dual-frequency bands is increased, so that the technical research on a dual-frequency band or multi-frequency band antenna feed system is more and more urgent.
In order to meet the requirements of more and more medium and low satellite ground station antennas and ensure that the satellite ground station antennas can track the satellite in real time in communication with the satellite, the capability of quickly tracking the satellite is provided for most earth station antennas.The current fast tracking mode of satellite earth station antenna mainly adopts: the method comprises program-guided tracking and single-pulse tracking, wherein the satellite orbit data needs to be predicted in advance in the program-guided tracking, the tracking is easy to deviate from the center, but the manufacturing cost is low, and the single-pulse tracking has the characteristics of high tracking precision, high speed, real-time performance, high cost and the like. Currently, the single pulse tracking method is mainly divided into the following four methods: the first mode is multi-horn synthesis, which is mainly applied to tracking radar antennas at present, has clear principle and more sensitive captured signals, but has the defects of low irradiation efficiency of the antenna, poor beam pointing consistency between frequency bands and the like in the application of dual-band or multi-band feed source satellite communication antennas; the second mode is the circular waveguide over-mode coupling TE21Mode, which is a mode of high radiation efficiency of the antenna and good uniformity of poor beam, but has a disadvantage of TE21The mode coupler and the synthesis network are relatively complex, so that the requirement on the processing precision is relatively high, and the mode is suitable for a single-band tracking network, so that the tracking mode is not suitable for a dual-band or multi-band tracking network; the third mode is that the circular waveguide is coupled with the TM in the mode of passing through the mode01The mode has simple structure and low cost, but the tracking mode has the defects of narrow working frequency band and can only track the circularly polarized beacon satellite; the fourth mode is that the bottom of the corrugated horn slot is coupled with HE21The mode is suitable for multi-band real-time tracking, and has the advantages of compact structure size, low cost and the like.
Chinese patent with application number CN20131016745.6 discloses a dual-slot deep three-band differential mode tracking feed source and a design method thereof, and relates to a dual-slot structure three-band common corrugated horn feed source and an L-band tracking technology thereof.
The Chinese patent with application number of CN90203857.5 discloses an antenna feed network device, which mainly comprises a corrugated horn and a TM01The mode coupler is not used for coupling out the differential mode HE from the corrugated groove21A mold, andand the function of tracking the linearly polarized beacon satellite by a single pulse cannot be realized.
The Chinese patent with the application number of CN01119333.6 discloses a corrugated horn feed source for improving the cross polarization characteristic of an offset parabolic antenna, which adds a section of light wall circular straight waveguide at the front end of a corrugated horn, the light wall circular straight waveguide does not belong to the corrugated horn, 5 TE (transverse electric potential) excitation devices are arranged on the inner wall of the straight waveguide21The resonant coupling cavity of the higher order mode, which is not the coupling port, does not extract the TE21The main function of the high-order mode signal, which opens 5 resonant coupling cavities, helps to improve the cross polarization performance of the offset parabolic antenna, and the functions to be realized by the two are completely different.
Disclosure of Invention
In view of this, the present invention is to provide a single-slot deep C/Ku dual-band differential mode tracking feed source and a design method thereof, which can implement dual-band communication, dual-band single-pulse tracking and dual-band sharing, and have the advantages of rotationally symmetric directional diagram, low side lobe level, small reflection loss, high gain, rotationally symmetric differential directional diagram, and the like.
Based on the above purpose, the technical scheme provided by the invention is as follows:
the utility model provides a feed is trailed to dark C of single groove Ku dual-band differential mode, it includes single groove structure ripple loudspeaker and differential mode feeder synthetic network, single groove structure ripple loudspeaker comprises changeover portion, the mode transform section, the variable frequency range, variable angle section and radiation section, the variable angle section is the single groove structural style of constituteing by a plurality of groove cycles, first to eight total coupling mouths have evenly been seted up in proper order on the circumference of the ripple loudspeaker that the anterior groove cycle department of variable angle section is corresponding, the contained angle between two adjacent coupling mouths is 45 degrees.
Optionally, the coupling port is a rectangular port radially opened at the bottom of the corrugated groove.
Optionally, the differential-mode feeder line combining network includes eight low-pass filters, eight waveguide coaxial converters, a ten-port microstrip differential-mode combiner, and a coaxial cable; signals output by the first coupling port and the fifth coupling port respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a first input port and a second input port of the ten-port microstrip differential mode synthesizer; signals output by the third coupling port and the seventh coupling port respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a third input port and a fourth input port of the ten-port microstrip differential mode synthesizer; signals output by the second coupling port and the sixth coupling port respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a fifth input port and a sixth input port of the ten-port microstrip differential mode synthesizer; signals output by the fourth coupling port and the eighth coupling port respectively pass through a low-pass filter and a waveguide coaxial converter and then enter a seventh input port and an eighth input port of the ten-port microstrip differential mode synthesizer; the first output port and the second output port of the ten-port microstrip differential mode synthesizer output a left-hand polarization antenna self-tracking signal and a right-hand polarization antenna self-tracking signal respectively.
Optionally, the coupling port is opened at the 10 th slot period in the direction from the mode conversion section to the radiation section on the angle conversion section.
Optionally, the variable angle section adopts a single groove deep structure form with one groove period formed by one straight groove and one groove tooth.
Optionally, the groove depth at the coupling port is 1.6 to 2.1 times the normal groove depth.
Optionally, the coupling port location of the differential mode signal is at an anti-node of the differential mode signal echo.
In addition, the invention also provides a design method of the single-groove-depth C/Ku dual-band differential mode tracking feed source, which comprises the following steps:
(1) designing a single-groove deep structure C/Ku dual-band shared corrugated horn feed source; wherein, the parameter of the single groove depth is designed according to the requirement of the C frequency band signal, and the admittance absolute value of the Ku frequency band is close to 1 to the maximum extent;
(2) according to the C/Ku double frequency of the single-groove deep structureThe equivalent admittance Y of the C frequency band differential mode signal is solved respectively by the groove parameters of the corrugated horn feed source shared by the segmentsDifference (D)；
Wherein, the mode conversion section of the C/Ku dual-band shared corrugated horn feed source consists of a ring loading groove, and a differential mode signal HE in the mode conversion section21Equivalent admittance Y of1 Difference (D)Comprises the following steps:
where p is the slot period and d1 is the slot width of the first slot loaded by the ring; wherein,
wherein d is the groove width, BdLoading the ring with additional admittance;
in the above formulae, E0～E6For intermediate variables, the calculation formula is as follows:
in the formula, J2Is a first 2-order Bessel function, J'2Is J2K is the free space propagation constant, N2Is a second class 2-order Bessel function or a Newman function, N'2Is N2The derivative of (a) is the groove inner diameter, B is the groove outer diameter, and B' is the dimension of the groove inner diameter plus one third of the groove depth;
the C/Ku dual-band shared corrugated horn feed source consists of straight grooves in the variable-angle section and the radiation section, and the equivalent admittance Y of the differential mode of the straight grooves2 Difference (D)Comprises the following steps:
(3) substituting the equivalent admittance of the C-band differential-mode signal into a corrugated waveguide characteristic equation derived by a surface impedance method to solve the HE of the C-band differential-mode signal under the conditions that m is 2 and n is 1mnA characteristic value of (d);
in the formula,Jm(k0a)、J'm(k0a) respectively an m-th order Bessel function and a derivative, k, of the m-th order Bessel function0a is the characteristic value of the C frequency band differential mode signal, and a is the radius of the inner wall of the corrugated groove;
(4) the characteristic value k of the C-band differential mode signal is measured0Substituting a into the following formula to solve the propagation constant β of the C-band differential mode signalDifference (D)：
(5) Propagation constant β according to C-band differential mode signalDifference (D)And judging the position of a critical cut-off point of the C-band differential mode signal in the following manner:
when βDifference (D)When the real number is positive, the C frequency band differential mode can be propagated in the corrugated groove;
when βDifference (D)When the difference mode is an imaginary number, the difference mode of the C frequency band cannot be transmitted in the corrugated groove;
when βDifference (D)When the frequency band difference mode is equal to 0, the frequency band difference mode in the corrugated groove is a critical cut-off point;
(6) according to the position of the critical cut-off point of the C-band differential mode signal and the propagation constant β of the C-band differential mode signalDifference (D)Calculating the antinode point of the C-band differential mode signalThe calculation formula is as follows:
wherein T is the Tth groove counted from the critical cut-off point, n is the nth antinode counted from the critical cut-off point, lambda is the free space wavelength, and pi is the circumferential rate;
(7) first to eighth coupling ports are uniformly and sequentially arranged on the circumference of the bottom of the corrugated horn groove at the antinode point of the C-band differential mode signal, the included angle between every two adjacent coupling ports is 45 degrees, and the coupling ports couple out the differential mode signal of the C-band, namely the HE21A modulus signal;
(8) according to HE21And designing a ten-port microstrip differential mode synthesizer according to the field pattern distribution diagram of the mode.
Optionally, the port design manner of the ten-port microstrip differential mode synthesizer in step (8) is as follows:
signals of first to fourth input ports in the ten-port microstrip differential mode synthesizer are added to output one linear polarization, signals of fifth to eighth input ports are added to output the other linear polarization, and the first and second output ports respectively output left-hand and right-hand circularly polarized C-band differential mode signals.
As can be seen from the above description, the beneficial effects of the present invention are:
1. the angle-variable section corrugated groove of the C/Ku dual-band corrugated horn is adopted, the angle-variable section is used as a separator of a frequency transition section of a dual-band main mode signal and a differential mode signal, the C-band main mode signal, the Ku-band main mode signal and the Ku-band differential mode signal can be transmitted, and the problem of separation of the C-band differential mode signal from the C-band main mode signal, the Ku-band main mode signal and the Ku-band differential mode signal is solved.
2. The invention adopts the groove period mode of the single groove structure, not only solves the problem that the working frequency band of the main mode signal is wide, and a C-band difference signal coupling port is arranged in one wide straight groove of a single straight groove in the groove period, but also successfully overcomes the influence of the coupling port arranged at the bottom of the corrugated groove on the working frequency band main mode signal and the Ku-band difference mode signal of the whole corrugated horn.
3. The C/Ku dual-band antenna can be arranged on the antenna to realize self-tracking of the circularly polarized signal of the C-band line and the circularly polarized signal of the Ku-band line, and has the excellent performances of high gain, low side lobe, low cross polarization, low axial ratio and the like.
4. The invention realizes the transmission of sum and difference signals of the antenna in two frequency bands of C/Ku by synthesizing the circular transition section, the mode conversion section, the variable frequency band, the variable angle section, the radiation section, the ten-port microstrip differential mode synthesizer, the cable, the low pass filter and the waveguide coaxial converter, thereby reducing the size of the antenna feed source, having compact structure and low processing cost.
5. The invention realizes the double-frequency-band double self-tracking function on the antenna, and can meet the performance requirement of the consistency of the electric axes between two self-tracking frequency bands, namely, the switching between the two self-energy tracking frequency bands is realized without tracking and losing the satellite.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a transition section of the mold of FIG. 1;
FIG. 3 is a schematic diagram of the structure of the transform band of FIG. 1;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a signal schematic block diagram of an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a ten-port microstrip differential mode synthesizer in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings in conjunction with specific embodiments.
As shown in fig. 1 to 6, a single-slot deep C/Ku dual-band differential mode tracking feed source comprises a single-slot structure corrugated horn and a differential mode feeder line synthesis network, wherein the single-slot structure corrugated horn is composed of a transition section 1, a mode conversion section 2, a frequency conversion section 3, an angle change section 4 and a radiation section 5, the angle change section 4 is in a single-slot structure form composed of a plurality of slot cycles, first to eighth coupling ports (4-1 to 4-8) are uniformly and sequentially arranged on the circumference of the corrugated horn corresponding to one slot cycle at the front part of the angle change section, and an included angle between every two adjacent coupling ports is 45 degrees.
In the embodiment, the circular transition section 1, the mode conversion section 2, the frequency conversion section 3, the variable angle section 4, the radiation section 5, the ten-port microstrip differential mode synthesizer 6, the cable 7, the low pass filter 8 and the waveguide coaxial converter 9 are synthesized, so that the sum and difference signals of the antenna in two frequency bands of C/Ku can be transmitted, the size of the antenna feed source is reduced, the structure is compact, and the processing cost is low.
Optionally, the coupling port radially opens a rectangular coupling port at the bottom of the corrugated groove.
Optionally, the differential-mode feeder line combining network includes eight low-pass filters, eight waveguide coaxial converters, a ten-port microstrip differential-mode combiner, and a coaxial cable; signals output by the first coupling port 4-1 and the fifth coupling port 4-5 respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a first input port IN1 and a second input port IN2 of the ten-port microstrip differential mode synthesizer; signals output by the third coupling port 4-3 and the seventh coupling port 4-7 respectively pass through a low-pass filter and a waveguide coaxial converter and then enter a third input port IN3 and a fourth input port IN4 of the ten-port microstrip differential mode synthesizer, signals output by the second coupling port 4-2 and the sixth coupling port 4-6 respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a fifth input port IN5 and a sixth input port IN6 of the ten-port microstrip differential mode synthesizer, and signals output by the fourth coupling port 4-4 and the eighth coupling port 4-8 respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a seventh input port IN7 and an eighth input port IN8 of the ten-port microstrip differential mode synthesizer; the first output port OUT1 and the second output port OUT2 of the ten-port microstrip differential mode synthesizer output a left-hand polarization antenna self-tracking signal and a right-hand polarization antenna self-tracking signal respectively.
Optionally, the coupling port is opened at the 10 th slot period in the direction from the mode conversion section to the radiation section on the angle conversion section.
Optionally, the variable angle section adopts a single groove deep structure form with one groove period formed by one straight groove and one groove tooth.
Optionally, the coupling port has a groove depth 1.6 to 2.1 times the normal groove depth.
Optionally, the coupling port location of the differential mode signal is at an anti-node of the differential mode signal echo.
The method for designing the single-slot-depth C/Ku dual-band differential mode tracking feed source comprises the following steps:
(1) designing a single-groove deep structure C/Ku dual-band shared corrugated horn feed source; the parameter of the single groove depth is designed according to the requirement of the C frequency band signal, and simultaneously, the admittance absolute value of the Ku frequency band is considered to be close to 1 as much as possible;
(2) respectively solving the equivalent admittance Y of the C-band differential-mode signal according to the slot parameters of the single-slot deep structure C/Ku dual-band shared corrugated horn feed sourceDifference (D)；
Wherein, the mode conversion section of the C/Ku dual-band shared corrugated horn feed source consists of a ring loading groove, and a differential mode signal HE in the mode conversion section21Equivalent admittance Y of1 Difference (D)Comprises the following steps:
where p is the slot period and d1 is the slot width of the first slot loaded by the ring; wherein,
wherein d is the groove width, BdLoading the ring with additional admittance (which has a small value and can be ignored);
in the above formulae, E0～E6For intermediate variables, the calculation formula is as follows:
in the formula, J2Is a first 2-order Bessel function, J'2Is J2K is the free space propagation constant, N2Is a second class 2-order Bessel function or a Newman function, N'2Is N2The derivative of (a) is the groove inner diameter, B is the groove outer diameter, and B' is the dimension of the groove inner diameter plus one third of the groove depth;
the C/Ku dual-band shared corrugated horn feed source consists of straight grooves in the variable-angle section and the radiation section, and the equivalent admittance Y of the differential mode of the straight grooves2 Difference (D)Comprises the following steps:
(3) substituting the equivalent admittance of the C-band differential-mode signal into the surfaceThe corrugated waveguide characteristic equation derived by the impedance method is used for solving the C-band differential mode signal HE under the conditions that m is 2 and n is 1mnA characteristic value of (d);
in the formula,Jm(k0a)、J'm(k0a) respectively an m-th order Bessel function and a derivative, k, of the m-th order Bessel function0a is the characteristic value of the C frequency band differential mode signal, and a is the radius of the inner wall of the corrugated groove; y isDifference (D)Can be taken Y1 Difference (D)And Y2 Difference (D)Respectively corresponding to HE in the mode conversion section, angle-changing section and radiation sectionmnA characteristic value of (d);
(4) the characteristic value k of the C-band differential mode signal is measured0Substituting a into the following formula to solve the propagation constant β of the C-band differential mode signalDifference (D)：
(5) Propagation constant β according to C-band differential mode signalDifference (D)And judging the position of a critical cut-off point of the C-band differential mode signal in the following manner:
when βDifference (D)When the real number is positive, the C frequency band differential mode can be propagated in the corrugated groove;
when βDifference (D)When the difference mode is an imaginary number, the difference mode of the C frequency band cannot be transmitted in the corrugated groove;
when βDifference (D)When the frequency band difference mode is equal to 0, the frequency band difference mode in the corrugated groove is a critical cut-off point;
(6) according to the position of the critical cut-off point of the C-band differential mode signal and the propagation constant β of the C-band differential mode signalDifference (D)CalculatingAnd (3) outputting an antinode point of the C-band differential mode signal, wherein the calculation formula is as follows:
wherein T is the Tth groove counted from the critical cut-off point, n is the nth antinode counted from the critical cut-off point, lambda is the free space wavelength, and pi is the circumferential rate;
(7) first to eighth coupling ports are uniformly and sequentially arranged on the circumference of the bottom of the corrugated horn groove at the antinode point of the C-band differential mode signal, the included angle between every two adjacent coupling ports is 45 degrees, and the coupling ports couple out the differential mode signal of the C-band, namely the HE21A modulus signal;
(8) according to HE21And designing a ten-port microstrip differential mode synthesizer according to the field pattern distribution diagram of the mode.
Optionally, the design method of the ten-port microstrip differential mode synthesizer in step (8) includes: signals of first to fourth input ports (IN1, IN2, IN3 and IN4) IN the ten-port microstrip differential mode synthesizer are added and then one path of linear polarization is output; signals of fifth to eighth input ports (IN5, IN6, IN7 and IN8) IN the ten-port microstrip differential mode synthesizer are added and then another linear polarization is output; the first output port OUT1 and the second output port OUT2 of the ten-port microstrip differential mode synthesizer output left-right circular polarization C-band differential mode signals.
The C/Ku dual-band common feed source for the 13-meter antenna is designed and manufactured by applying the design method of the single-groove deep dual-band differential mode tracking feed source, and the actual measurement result shows that the C/Ku dual-band common feed source not only realizes the frequency transmission of C/Ku dual-band main mode signals, but also realizes the separation of C-band differential mode signals, and also transmits Ku-band differential mode signals. A radiation directional diagram with rotational symmetry of a directional diagram of a main mode is generated in two frequency bands of C and Ku (the frequency band of C is 3.625-4.2 GHz for receiving and 5.85-6.425 GHz for transmitting, the frequency band of Ku is 12.25-12.75 GHz for receiving and 14-14.5 GHz for transmitting), the cross polarization level is less than-30 dB, and the reflection loss is superior to 17 dB. The radiation pattern with the rotationally symmetric directional pattern of the differential mode tracking frequency (the C frequency band: 3.625-4.2 GHz, the Ku frequency band: 12.25-12.75 GHz) realizes the monopulse tracking function and meets the tracking precision performance requirement of 1/20 beam width in a C/Ku dual-frequency band as a feed source of a 16-meter antenna.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples. Any omissions, modifications, substitutions, improvements and the like in the foregoing embodiments are intended to be included within the scope of the present invention within the spirit and principle of the present invention.
Claims (9)
1. The utility model provides a feed is trailed to dark C of single groove Ku dual-band differential mode, a serial communication port, including single groove structure ripple loudspeaker and differential mode feeder synthetic network, single groove structure ripple loudspeaker comprises changeover portion, mode changeover portion, variable frequency section, variable angle section and radiation section, the variable angle section is the single groove structural style of constituteing by a plurality of groove periods, evenly has seted up eight coupling mouths altogether of first to eighth in proper order on the circumference of the corresponding ripple loudspeaker of the anterior groove period department of variable angle section, and the contained angle between two adjacent coupling mouths is 45 degrees.
2. The single-slot-depth C/Ku dual-band differential mode tracking feed source of claim 1, wherein the coupling port is a rectangular port formed in the bottom of the corrugated slot in the radial direction.
3. The single-slot deep C/Ku dual-band differential mode tracking feed source according to claim 1, wherein the differential mode feed line combining network comprises eight low pass filters, eight waveguide coaxial converters, a ten-port microstrip differential mode combiner, and a coaxial cable; signals output by the first coupling port and the fifth coupling port respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a first input port and a second input port of the ten-port microstrip differential mode synthesizer; signals output by the third coupling port and the seventh coupling port respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a third input port and a fourth input port of the ten-port microstrip differential mode synthesizer; signals output by the second coupling port and the sixth coupling port respectively pass through the low-pass filter and the waveguide coaxial converter and then enter a fifth input port and a sixth input port of the ten-port microstrip differential mode synthesizer; signals output by the fourth coupling port and the eighth coupling port respectively pass through a low-pass filter and a waveguide coaxial converter and then enter a seventh input port and an eighth input port of the ten-port microstrip differential mode synthesizer; the first output port and the second output port of the ten-port microstrip differential mode synthesizer output a left-hand polarization antenna self-tracking signal and a right-hand polarization antenna self-tracking signal respectively.
4. The single-slot deep C/Ku dual-band differential mode tracking feed source according to claim 1, wherein the coupling port is opened at the 10 th slot period from the mode conversion section to the radiation section on the angle-variable section.
5. The single-slot-depth C/Ku dual-band differential mode tracking feed source of claim 1, wherein the variable-angle segment is in a single-slot-depth structural form with one slot period formed by one straight concave slot and one slot tooth.
6. The single-slot-depth C/Ku dual-band differential mode tracking feed source according to claim 1, wherein the slot depth at the coupling port is 1.6 to 2.1 times the normal slot depth.
7. The single-slot deep C/Ku dual-band differential mode tracking feed source according to claim 1, wherein the coupling port of the differential mode signal is located at an anti-node of an echo of the differential mode signal.
8. A design method of a single-slot-depth C/Ku dual-band differential mode tracking feed source according to any one of claims 1 to 7, characterized by comprising the following steps:
(1) designing a single-groove deep structure C/Ku dual-band shared corrugated horn feed source; wherein, the parameter of the single groove depth is designed according to the requirement of the C frequency band signal, and the admittance absolute value of the Ku frequency band is close to 1 to the maximum extent;
(2) respectively solving the equivalent admittance Y of the C-band differential-mode signal according to the slot parameters of the single-slot deep structure C/Ku dual-band shared corrugated horn feed sourceDifference (D)；
The mode conversion section of the C/Ku dual-band shared corrugated horn feed source consists of a ring loading groove, and a differential mode signal HE in the mode conversion section21Equivalent admittance Y of1 Difference (D)Comprises the following steps:
where p is the slot period and d1 is the slot width of the first slot loaded by the ring; wherein,
<mrow> <msub> <mi>E</mi> <mn>0</mn> </msub> <mo>=</mo> <mfrac> <mrow> <mi>d</mi> <mn>1</mn> </mrow> <mi>d</mi> </mfrac> <mrow> <mo>(</mo> <mfrac> <msub> <mi>E</mi> <mn>5</mn> </msub> <msub> <mi>E</mi> <mn>6</mn> </msub> </mfrac> <mo>+</mo> <msub> <mi>B</mi> <mi>d</mi> </msub> <mo>)</mo> </mrow> <mo>,</mo> </mrow>1
wherein d is the groove width, BdLoading the ring with additional admittance;
in the above formulae, E0～E6For intermediate variables, the calculation formula is as follows:
<mrow> <mfenced open = "" close = "}"> <mtable> <mtr> <mtd> <mrow> <msub> <mi>E</mi> <mn>1</mn> </msub> <mo>=</mo> <msubsup> <mi>J</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> <msubsup> <mi>N</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <mi>k</mi> <mi>A</mi> <mo>)</mo> </mrow> <mo>-</mo> <msubsup> <mi>J</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <mi>k</mi> <mi>A</mi> <mo>)</mo> </mrow> <msubsup> <mi>N</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>E</mi> <mn>2</mn> </msub> <mo>=</mo> <msubsup> <mi>J</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> <msub> <mi>N</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mi>A</mi> <mo>)</mo> </mrow> <mo>-</mo> <msub> <mi>J</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mi>A</mi> <mo>)</mo> </mrow> <msubsup> <mi>N</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>E</mi> <mn>3</mn> </msub> <mo>=</mo> <msubsup> <mi>J</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <mi>k</mi> <mi>A</mi> <mo>)</mo> </mrow> <msub> <mi>N</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> <mo>-</mo> <msub> <mi>J</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> <msubsup> <mi>N</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <mi>k</mi> <mi>A</mi> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>E</mi> <mn>4</mn> </msub> <mo>=</mo> <msub> <mi>J</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mi>A</mi> <mo>)</mo> </mrow> <msub> <mi>N</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> <mo>-</mo> <msub> <mi>J</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> <msub> <mi>N</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mi>A</mi> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>E</mi> <mn>5</mn> </msub> <mo>=</mo> <msubsup> <mi>J</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> <msub> <mi>N</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mi>B</mi> <mo>)</mo> </mrow> <mo>-</mo> <msub> <mi>J</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mi>B</mi> <mo>)</mo> </mrow> <msubsup> <mi>N</mi> <mn>2</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>E</mi> <mn>6</mn> </msub> <mo>=</mo> <msub> <mi>J</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> <msub> <mi>N</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mi>B</mi> <mo>)</mo> </mrow> <mo>-</mo> <msub> <mi>J</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mi>B</mi> <mo>)</mo> </mrow> <msub> <mi>N</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <msup> <mi>kB</mi> <mo>&prime;</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>,</mo> </mrow>
in the formula, J2Is a first 2-order Bessel function, J'2Is J2K is the free space propagation constant, N2Is a second class 2-order Bessel function or a Newman function, N'2Is N2The derivative of (a) is the groove inner diameter, B is the groove outer diameter, and B' is the dimension of the groove inner diameter plus one third of the groove depth;
the C/Ku dual-band shared corrugated horn feed source consists of straight grooves in the variable-angle section and the radiation section, and the equivalent admittance Y of the differential mode of the straight grooves2 Difference (D)Comprises the following steps:
(3) substituting the equivalent admittance of the C-band differential-mode signal into a corrugated waveguide characteristic equation derived by a surface impedance method to solve the HE of the C-band differential-mode signal under the conditions that m is 2 and n is 1mnA characteristic value of (d);
in the formula,Jm(k0a)、J'm(k0a) respectively an m-th order Bessel function and a derivative, k, of the m-th order Bessel function0a is the characteristic value of C frequency band differential mode signal, a is waveThe radius of the inner wall of the groove;
(4) the characteristic value k of the C-band differential mode signal is measured0Substituting a into the following formula to solve the propagation constant β of the C-band differential mode signalDifference (D)：
(5) Propagation constant β according to C-band differential mode signalDifference (D)And judging the position of a critical cut-off point of the C-band differential mode signal in the following manner:
when βDifference (D)When the real number is positive, the C frequency band differential mode can be propagated in the corrugated groove;
when βDifference (D)When the difference mode is an imaginary number, the difference mode of the C frequency band cannot be transmitted in the corrugated groove;
when βDifference (D)When the frequency band difference mode is equal to 0, the frequency band difference mode in the corrugated groove is a critical cut-off point;
(6) according to the position of the critical cut-off point of the C-band differential mode signal and the propagation constant β of the C-band differential mode signalDifference (D)And calculating the anti-node of the C frequency band differential mode signal, wherein the calculation formula is as follows:
wherein T is the Tth groove counted from the critical cut-off point, n is the nth antinode counted from the critical cut-off point, lambda is the free space wavelength, and pi is the circumferential rate;
(7) first to eighth coupling ports are uniformly and sequentially arranged on the circumference of the bottom of the corrugated horn groove at the antinode point of the C-band differential mode signal, the included angle between every two adjacent coupling ports is 45 degrees, and the coupling ports couple out the differential mode signal of the C-band, namely the HE21A modulus signal;
(8) according to HE21And designing a ten-port microstrip differential mode synthesizer according to the field pattern distribution diagram of the mode.
9. The design method according to claim 8, wherein the port design manner of the ten-port microstrip differential mode synthesizer in the step (8) is as follows:
signals of first to fourth input ports in the ten-port microstrip differential mode synthesizer are added to output one linear polarization, signals of fifth to eighth input ports are added to output the other linear polarization, and the first and second output ports respectively output left-hand and right-hand circularly polarized C-band differential mode signals.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039583A (en) * | 2017-10-31 | 2018-05-15 | 安徽四创电子股份有限公司 | A kind of high band millimeter wave feed |
| CN112492891A (en) * | 2018-04-27 | 2021-03-12 | 上海诺基亚贝尔股份有限公司 | Multi-band antenna feed |
| CN112599980A (en) * | 2020-11-13 | 2021-04-02 | 中国人民解放军63699部队 | Dual-band multi-mode combined feed source loudspeaker |
| CN113690623A (en) * | 2021-08-30 | 2021-11-23 | 合肥工业大学 | Double-frequency circular polarization hexagonal horn antenna for improving aperture efficiency of array surface |
| US12132245B2 (en) | 2018-04-27 | 2024-10-29 | Nokia Shanghai Bell Co., Ltd. | Apparatus comprising an inner waveguide and a coaxial waveguide configured to be fed with first and second frequency signals through a tunable coaxial turnstile junction |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337707A (en) * | 2013-05-10 | 2013-10-02 | 中国电子科技集团公司第五十四研究所 | Double-slot-depth tri-band differential mode tracking feed source and design method thereof |
| US20160134004A1 (en) * | 2014-11-12 | 2016-05-12 | Ayecka Communication Systems | Dual band antenna configuration |
| CN106450780A (en) * | 2016-11-21 | 2017-02-22 | 中国科学院国家空间科学中心 | Dual-band corrugated horn antenna with single groove-deep structure |
-
2017
- 2017-06-01 CN CN201710403769.1A patent/CN107248619B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337707A (en) * | 2013-05-10 | 2013-10-02 | 中国电子科技集团公司第五十四研究所 | Double-slot-depth tri-band differential mode tracking feed source and design method thereof |
| US20160134004A1 (en) * | 2014-11-12 | 2016-05-12 | Ayecka Communication Systems | Dual band antenna configuration |
| CN106450780A (en) * | 2016-11-21 | 2017-02-22 | 中国科学院国家空间科学中心 | Dual-band corrugated horn antenna with single groove-deep structure |
Non-Patent Citations (1)
| Title |
|---|
| 邓智勇，张文静，阮云国，王垒: "X/Ka双频波纹喇叭耦合X频段差模的研究", 《电磁场与微波》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039583A (en) * | 2017-10-31 | 2018-05-15 | 安徽四创电子股份有限公司 | A kind of high band millimeter wave feed |
| CN108039583B (en) * | 2017-10-31 | 2020-12-22 | 安徽四创电子股份有限公司 | High-frequency-band millimeter wave feed source |
| CN112492891A (en) * | 2018-04-27 | 2021-03-12 | 上海诺基亚贝尔股份有限公司 | Multi-band antenna feed |
| CN112492891B (en) * | 2018-04-27 | 2022-06-10 | 上海诺基亚贝尔股份有限公司 | Multi-band antenna feed |
| US12132245B2 (en) | 2018-04-27 | 2024-10-29 | Nokia Shanghai Bell Co., Ltd. | Apparatus comprising an inner waveguide and a coaxial waveguide configured to be fed with first and second frequency signals through a tunable coaxial turnstile junction |
| CN112599980A (en) * | 2020-11-13 | 2021-04-02 | 中国人民解放军63699部队 | Dual-band multi-mode combined feed source loudspeaker |
| CN113690623A (en) * | 2021-08-30 | 2021-11-23 | 合肥工业大学 | Double-frequency circular polarization hexagonal horn antenna for improving aperture efficiency of array surface |
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