CN114824753B - Secant square antenna - Google Patents
Secant square antenna Download PDFInfo
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- CN114824753B CN114824753B CN202210275858.3A CN202210275858A CN114824753B CN 114824753 B CN114824753 B CN 114824753B CN 202210275858 A CN202210275858 A CN 202210275858A CN 114824753 B CN114824753 B CN 114824753B
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- 230000005855 radiation Effects 0.000 claims abstract description 63
- 230000005284 excitation Effects 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims description 265
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000000295 complement effect Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000007704 transition Effects 0.000 description 12
- 230000009977 dual effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a complementary square antenna, which comprises a feed network and a radiation network which are laminated in sequence from bottom to top, wherein the feed network is used for transmitting electromagnetic waves with amplitude distribution and phase distribution required by converting an input excitation signal into the complementary square antenna to the radiation network, the radiation network is used for radiating the electromagnetic waves transmitted to the feed network to free space, and the feed network is a hybrid feed network based on a waveguide structure and a coaxial structure; the method has the advantages of wide bandwidth and high efficiency, and can be applied to wide bandwidth and high gain scenes.
Description
Technical Field
The present invention relates to antennas, and more particularly, to a cosecant square antenna.
Background
In the low-altitude slow-reflection unmanned aerial vehicle detection search process, antenna types with narrow beams in the horizontal plane and fan beams in the vertical plane are generally adopted. Since the power density of an electromagnetic wave in the propagation process is inversely proportional to the square of the propagation distance, the intensity of an echo signal received by an antenna often varies with the distance between objects. In order to make the intensities of echo signals received by the antennas are generally used to generate a cosecant square beam directly in a vertical plane. Such antennas are called cosecant square antennas, where the vertical plane is the cosecant square beam and the horizontal plane is the narrow beam. The secant-square antenna may allow the received echo signal strength to vary substantially only with height, independent of target distance. Such as "tacon" (tactical air navigation system) for navigation of carrier-based aircraft, use a secant square antenna. Currently, the secant-square antenna has been widely used in navigation, communication, and radar devices.
The complementary square antennas reported so far are substrate integrated waveguide structures based on microstrip line structures or series feed structures. Both the microstrip line structure and the series feed structure then produce conductor and dielectric losses such that the bandwidth of existing secant-square antennas is typically very narrow and inefficient and cannot be used in wide bandwidth and high gain scenarios.
Disclosure of Invention
The invention aims to solve the technical problem of providing a complementary square antenna which has wider bandwidth and higher efficiency and can be applied to wide bandwidth and high gain scenes.
The technical scheme adopted for solving the technical problems is as follows: the cut square antenna comprises a feed network and a radiation network which are laminated in sequence from bottom to top, wherein the feed network is used for transmitting electromagnetic waves with amplitude distribution and phase distribution required by converting an input excitation signal into the cut square antenna to the radiation network, the radiation network is used for transmitting the electromagnetic waves transmitted to the feed network to the free space, and the feed network is a hybrid feed network based on a waveguide structure and a coaxial structure.
The feed network comprises a first waveguide feed network, a rectangular coaxial feed network and a second waveguide feed network which are arranged in parallel from left to right; the first waveguide feed network comprises a first metal plate, a first magic T, two couplers, two phase shifters, two wave absorbing devices, ten single-ridge waveguide adapters, six double-ridge waveguide adapters and four waveguide channels, wherein the first metal plate is a rectangular plate, in the first waveguide feed network, the first magic T, the two couplers, the two phase shifters, the two wave absorbing devices, the ten single-ridge waveguide adapters, the six double-ridge waveguide adapters and the four waveguide channels are all arranged on the first metal plate, two couplers in the first waveguide feed network are provided with four ports, which are called a first port, a second port, a third port and a fourth port, two couplers in the first waveguide feed network are respectively called a first coupler and a second coupler, the two phase shifters in the first waveguide feed network are respectively provided with two ports, the two ports are called a first port and a second port, the two phase shifters in the first waveguide feed network are respectively called a first phase shifter and a second phase shifter, the two wave absorbing devices in the first waveguide feed network are respectively called a first wave absorbing device and a second wave absorbing device, ten single-ridge waveguide adapters in the first waveguide feed network are respectively provided with two ports, the two ports of each single-ridge waveguide adapter are respectively called a first port and a second port, the ten single-ridge waveguide adapters in the first waveguide feed network are respectively called a first single-ridge waveguide adapter, a second single-ridge waveguide adapter, a third single-ridge waveguide adapter, a fourth single-ridge waveguide adapter, a fifth single-ridge waveguide adapter, the six double-ridge waveguide adapters in the first waveguide feed network are respectively called a first double-ridge waveguide adapter, a second double-ridge waveguide adapter, a third double-ridge waveguide adapter, a fourth double-ridge waveguide adapter, a fifth double-ridge waveguide adapter and a sixth double-ridge waveguide adapter, the four waveguide channels in the first waveguide feed network are respectively provided with two ports, the two ports are respectively called a first waveguide channel, a second waveguide channel, a third waveguide channel and a fourth waveguide channel, the four waveguide channels in the first waveguide feed network are respectively called a first waveguide channel, a third waveguide channel and a fourth waveguide channel, the first waveguide channels are respectively arranged at the center of the first metal plate, the fourth waveguide channels are respectively called a first port and a second port, the four waveguide channels in the first waveguide feed network are respectively called a first waveguide channel, a second waveguide channel, a third waveguide channel and a fourth waveguide channel, the first magic T is arranged at the center of the first metal plate, and the first magic T and the third magic T are respectively provided with a first axial port, a second axial port and a third axial port; the first coupler and the second coupler are axisymmetric about the central axis of the first metal plate, the first phase shifter and the second phase shifter are axisymmetric about the central axis of the first metal plate, the first and the second wave absorbing devices are axisymmetric about the central axis of the first metal plate, the first and the sixth single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the second and the seventh single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the third and the eighth single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the fifth and the ninth single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the fifth and the seventh single-ridge waveguide adapters are axisymmetric about the central axis of the first and the second metal plate, the third and the eighth single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the third and the fourth waveguide adapter are axisymmetric about the central axis of the first metal plate, the fifth and the eighth single-ridge waveguide adapter are axisymmetric about the central axis of the first metal plate, the second waveguide channel and the fourth waveguide channel are axisymmetric with respect to the central axis of the first metal plate; the input port of the first magic T is connected with an external input signal, the first output port of the first magic T is connected with the first port of the first coupler, the second output port of the first magic T is connected with the first port of the second coupler, the second port of the first coupler is connected with the first wave-absorbing device, the third port of the first coupler is connected with the first port of the second single-ridge waveguide adapter, the fourth port of the first coupler is connected with the first port of the third single-ridge waveguide adapter, the second port of the second coupler is connected with the second wave-absorbing device, the third port of the second coupler is connected with the first port of the seventh single-ridge waveguide adapter, the fourth port of the second coupler is connected with the first port of the eighth single-ridge waveguide adapter, the first phase shifter is positioned at the left side of the first coupler, the first port of the first phase shifter is connected with the first port of the second double-ridge waveguide adapter, the second port of the first phase shifter is connected with the first port of the fourth single-ridge waveguide adapter, the first port of the second phase shifter is connected with the first port of the fifth double-ridge waveguide adapter, the second port of the second phase shifter is connected with the first port of the ninth single-ridge waveguide adapter, the first waveguide channel is positioned below the first coupler, the first port of the first waveguide channel is connected with the first port of the first single-ridge waveguide adapter, the second port of the first waveguide channel is connected with the first port of the first double-ridge waveguide adapter, the second waveguide channel is positioned at the left side of the first phase shifter, a first port of the second waveguide channel is connected with a first port of the fifth single-ridge waveguide adapter, and a second port of the second waveguide channel is connected with a first port of the third double-ridge waveguide adapter; the first port of the third waveguide channel is connected with the first port of the sixth single-ridge waveguide adapter, the second port of the third waveguide channel is connected with the first port of the fourth double-ridge waveguide adapter, the fourth waveguide channel is positioned on the right side of the second phase shifter, the first port of the fourth waveguide channel is connected with the first port of the tenth single-ridge waveguide adapter, and the second port of the fourth waveguide channel is connected with the first port of the sixth double-ridge waveguide adapter; the rectangular coaxial feed network comprises a second metal plate, two one-to-two power dividers, two one-to-three power dividers, two one-to-six power dividers, two one-to-nine power dividers, ten single-ridge waveguide adapters, eight double-ridge waveguide adapters and a waveguide channel, wherein the second metal plate is a rectangular plate, the second metal plate is positioned on the right side of the first metal plate, the left end face of the second metal plate is attached to the right end face of the first metal plate, the front end face of the second metal plate is positioned on the same plane as the front end face of the first metal plate, the rear end face of the second metal plate is positioned on the same plane as the rear end face of the first metal plate, the upper end face of the second metal plate is positioned on the same plane as the upper end face of the first metal plate, the lower end face of the second metal plate is positioned on the same plane as the lower end face of the first metal plate, the two one-to-two power dividers, two one-to-three power dividers, two one-to-six power dividers, two one-to-nine power dividers, ten single-ridge waveguide adapters, eight double-ridge waveguide adapters and a waveguide channel of the rectangular coaxial feed network are all arranged on the second metal plate, the two one-to-two power dividers of the rectangular coaxial feed network are provided with an input port and two output ports, the two one-to-two power dividers of the rectangular coaxial feed network are respectively called a first one-to-two power divider and a second one-to-two power divider, the two one-to-three power dividers of the rectangular coaxial feed network are respectively provided with an input port and three output ports, the two one-to-three power dividers of the rectangular coaxial feed network are respectively called a first one-to-three power divider and a second one-to-three power divider, the two one-to-six power dividers of the rectangular coaxial feed network are respectively provided with an input port and six output ports, the two one-to-six power dividers of the rectangular coaxial feed network are respectively called a first one-to-six power divider and a second one-to-six power divider, the two one-to-nine power dividers of the rectangular coaxial feed network are respectively provided with an input port and nine output ports, the two one-to-nine power dividers of the rectangular coaxial feed network are respectively called a first one-to-nine power divider and a second one-to-nine power divider, the ten single-ridge waveguide adapters of the rectangular coaxial feed network are respectively provided with two ports, the two ports are respectively a first port and a second port, the ten single-ridge waveguide adapters of the rectangular coaxial feed network are respectively called an eleventh single-ridge waveguide adapter, a twelfth single-ridge waveguide adapter, a thirteenth single-ridge waveguide adapter, a fourteenth single-ridge waveguide adapter, a fifteenth single-ridge waveguide adapter, a sixteenth single-ridge waveguide adapter, a seventeenth single-ridge waveguide adapter, an eighteenth single-ridge waveguide adapter, a nineteenth single-ridge waveguide adapter and a twenty-first-ridge waveguide adapter, the eight double-ridge waveguide adapters of the rectangular coaxial feed network are respectively called a seventh double-ridge waveguide adapter, an eighth double-ridge waveguide adapter, a ninth double-ridge waveguide adapter, a tenth double-ridge waveguide adapter, an eleventh double-ridge waveguide adapter, a twelfth double-ridge waveguide adapter, a thirteenth double-ridge waveguide adapter and a fourteenth double-ridge waveguide adapter, the eight double-ridge waveguide adapters of the rectangular coaxial feed network are respectively provided with a first port and a second port, the eight double-ridge waveguide adapters of the rectangular coaxial feed network are respectively called a seventh double-ridge waveguide adapter, an eighth double-waveguide adapter of the rectangular coaxial feed network, the fifth waveguide channel is provided with a first port and a second port; the seventh and eleventh double-ridge waveguide adapters are axisymmetric about the second metal plate axis, the eighth and tenth double-ridge waveguide adapters are axisymmetric about the second metal plate axis, the thirteenth and thirteenth double-ridge waveguide adapters are axisymmetric about the second metal plate axis, the tenth and fourteenth double-ridge waveguide adapters are axisymmetric about the second metal plate axis, the thirteenth and thirteenth single-ridge waveguide adapters are axisymmetric about the second metal plate axis, the thirteenth and seventeenth single-ridge waveguide adapters are axisymmetric about the second metal plate axis, the first and second power splitters are axisymmetric about the second metal plate, the first port of the fifth waveguide channel is connected to the third output port of the first magic T, the first port of the eleventh single-ridge waveguide adapter is connected to the second port of the first single-ridge waveguide adapter, the first port of the twelfth single-ridge waveguide adapter is connected to the second port of the second single-ridge waveguide adapter, the first port of the thirteenth single-ridge waveguide adapter is connected to the second port of the third single-ridge waveguide adapter, the first port of the fourteenth single-ridge waveguide adapter is connected to the second port of the fourth single-ridge waveguide adapter, the first port of the fifteenth single-ridge waveguide adapter is connected to the second port of the fifth single-ridge waveguide adapter, the first port of the sixteenth single-waveguide adapter is connected to the first port of the eighth single-ridge waveguide adapter, the seventeenth single-ridge waveguide adapter is connected to the first port of the eighth single-ridge waveguide adapter, the seventeenth single-waveguide adapter is connected to the first port of the eighth single-ridge waveguide adapter, the first port of the eighth double-ridge waveguide adapter is connected with the second port of the first double-ridge waveguide adapter, the second port of the eighth double-ridge waveguide adapter is connected with the input port of the first one-to-three-power splitter, the first port of the ninth double-ridge waveguide adapter is connected with the second port of the second double-ridge waveguide adapter, the second port of the ninth double-ridge waveguide adapter is connected with the input port of the first one-to-one-six-power splitter, the first port of the tenth double-ridge waveguide adapter is connected with the second port of the third double-ridge waveguide adapter, the second port of the tenth double-ridge waveguide adapter is connected with the input port of the first one-to-three-power splitter, the first port of the eleventh double-ridge waveguide adapter is connected with the input port of the second one-to-three-power splitter, the first port of the ninth double-ridge waveguide adapter is connected with the fourth port of the fourth double-ridge waveguide adapter, the second port of the thirteenth double-ridge waveguide adapter is connected with the second one-to-four-power splitter, the thirteenth waveguide is connected with the first one-to-fourth one-to-power splitter, the thirteenth waveguide is connected with the thirteenth one-to-fourth waveguide adapter is connected with the fourth one-to-fourth port of the eighth double-ridge waveguide adapter, the first one-to-three power divider and the first one-to-two power divider are positioned at the left side of the central axis of the second metal plate and are sequentially arranged from left to right, and the second one-to-two power divider, the second one-to-three power divider, the second one-to-six power divider and the second one-to-nine power divider are all positioned at the right side of the central axis of the second metal plate and are sequentially arranged from left to right, and the second one-to-two power divider is positioned at the right side of the first one-to-two power divider; the second waveguide feed network comprises a third metal plate, four couplers, five wave absorbing devices, four phase shifters, one waveguide channel, ten single-ridge waveguide adapters and two double-ridge waveguide adapters, wherein the third metal plate is a rectangular plate, the third metal plate is positioned on the right side of the second metal plate, the left end face of the third metal plate is attached to the right end face of the second metal plate, the front end face of the third metal plate and the front end face of the second metal plate are positioned on the same plane, the rear end face of the third metal plate and the rear end face of the second metal plate are positioned on the same plane, the upper end face of the third metal plate and the upper end face of the second metal plate are positioned on the same plane, the lower end face of the third metal plate and the lower end face of the second metal plate are located on the same plane, four couplers, five wave absorbing devices, four phase shifters, ten single-ridge waveguide adapters and two double-ridge waveguide adapters of the second waveguide feed network are all arranged on the third metal plate, the four couplers of the second waveguide feed network are provided with a first port, a second port, a third port and a fourth port, the four couplers of the second waveguide feed network are respectively called a third coupler, a fourth coupler, a fifth coupler and a sixth coupler, and the five wave absorbing devices of the second waveguide feed network are respectively called a third wave absorbing device, a fourth wave absorbing device, a fifth wave absorbing device, a sixth wave absorbing device and a seventh wave absorbing device; the four phase shifters of the second waveguide feeding network are respectively called a third phase shifter, a fourth phase shifter, a fifth phase shifter and a sixth phase shifter, the waveguide channels of the second waveguide feeding network are respectively provided with a first port and a second port, the waveguide channels of the second waveguide feeding network are respectively called a sixth waveguide channel, the ten single-ridge waveguide switches of the second waveguide feeding network are respectively provided with a first port and a second port, the ten single-ridge waveguide switches of the second waveguide feeding network are respectively called a twenty-first single-ridge waveguide switch, a twenty-second single-ridge waveguide switch, a twenty-third single-ridge waveguide switch, a twenty-fourth single-ridge waveguide switch, a twenty-fifth single-ridge waveguide switch, a twenty-sixteen single-ridge waveguide switch, a twenty-seventeenth single-ridge waveguide switch, a twenty-eighteenth single-ridge waveguide switch, a twenty-ninth single-ridge waveguide switch and a thirty-first single-ridge switch, the two double-ridge waveguide adapters of the second waveguide feeding network are respectively called a fifteenth double-ridge waveguide adapter and a sixteenth double-ridge waveguide adapter, the third coupler and the fifth coupler are symmetrical about the central axis of the third metal plate, the fourth coupler and the sixth coupler are symmetrical about the central axis of the third metal plate, the third wave absorbing device and the fifth wave absorbing device are symmetrical about the central axis of the third metal plate, the fourth and sixth wave absorbing devices are axisymmetric about the central axis of the third metal plate, the third and fifth phase shifters are axisymmetric about the central axis of the third metal plate, the fourth and sixth phase shifters are axisymmetric about the central axis of the third metal plate, the twenty-first and second sixteen-first waveguide adapters are axisymmetric about the central axis of the third metal plate, the twenty-second and second seventeenth-first waveguide adapters are axisymmetric about the central axis of the third metal plate, the twenty-first and second eighteenth-first waveguide adapters are axisymmetric about the central axis of the thirty-first waveguide of the third metal plate, the twenty-first and second eighteenth-first waveguide adapters are axisymmetric about the central axis of the third metal plate, the twenty-first and second nineteenth-first waveguide adapters are axisymmetric about the central axis of the third metal plate, the twenty-first and second waveguide adapters are axisymmetric about the central axis of the thirty-first waveguide of the third metal plate; the first port of the sixth waveguide channel is connected with the seventh wave absorbing device, and the second port of the sixth waveguide channel is connected with the second port of the fifth waveguide channel; the second port of the fifteenth double-ridge waveguide adapter is connected with the second port of the seventh double-ridge waveguide adapter; the second port of the twenty-first single-ridge waveguide adapter is connected with the second port of the eleventh single-ridge waveguide adapter, the second port of the twenty-first single-ridge waveguide adapter is connected with the second port of the twelfth single-ridge waveguide adapter, the second port of the twenty-third single-ridge waveguide adapter is connected with the second port of the thirteenth single-ridge waveguide adapter, the second port of the twenty-fourth single-ridge waveguide adapter is connected with the second port of the fourteenth single-ridge waveguide adapter, the second port of the twenty-fifth single-ridge waveguide adapter is connected with the second port of the fifteenth single-ridge waveguide adapter, and the second port of the sixteenth double-ridge waveguide adapter is connected with the second port of the eleventh double-ridge waveguide adapter; the second port of the twenty-first single-ridge waveguide adapter is connected with the second port of the sixteenth single-ridge waveguide adapter, the second port of the twenty-first single-ridge waveguide adapter is connected with the second port of the seventeenth single-ridge waveguide adapter, the second port of the twenty-eighth single-ridge waveguide adapter is connected with the second port of the eighteenth single-ridge waveguide adapter, the second port of the twenty-ninth single-ridge waveguide adapter is connected with the second port of the nineteenth single-ridge waveguide adapter, the second port of the thirty-first single-ridge waveguide adapter is connected with the second port of the twenty-first single-ridge waveguide adapter, the second port of the third phase shifter is connected with the first port of the fifteenth double-ridge waveguide adapter, the second port of the fourth phase shifter is connected with the first port of the twenty-second single-ridge waveguide adapter, the second port of the fifth phase shifter is connected with the first port of the sixteenth double-ridge waveguide adapter, the second port of the sixth phase shifter is connected with the first port of the seventeenth single-ridge waveguide adapter, the third coupler is positioned at the left side of the central axis of the third metal plate, the first port of the third coupler is connected with the first port of the eleventh single-ridge waveguide adapter, the second port of the third coupler is connected with the first port of the third phase shifter, the third port of the third coupler is connected with the third wave absorbing device, the fourth port of the third coupler is connected with the first port of the fourth phase shifter, the fourth coupler is positioned at the left side of the third coupler, the first port of the fourth coupler is connected with the first port of the thirteenth single-ridge waveguide adapter, the second port of the fourth coupler is connected with the first port of the fourth wave-absorbing device, the third port of the fifth coupler is connected with the first port of the thirteenth single-ridge waveguide adapter, the fourth port of the fourth coupler is connected with the first port of the fifteenth single-ridge waveguide adapter, the fifth coupler is positioned on the right side of the central axis of the third metal plate, the first port of the fifth coupler is connected with the first port of the thirteenth single-ridge waveguide adapter, the second port of the fifth coupler is connected with the first port of a fifth wave-absorbing device, the third port of the fifth coupler is connected with the fifth wave-absorbing device, the fourth port of the fifth coupler is connected with the first port of the sixth phase shifter, the fifth coupler is positioned on the right side of the fifth coupler, the fifth coupler is connected with the fifth port of the fifth wave-absorbing device, the fifth coupler is connected with the fifth port of the fifth single-ridge waveguide adapter, the fifth coupler is connected with the fifth port of the fifth waveguide; the radiation network comprises a fourth metal plate and forty radiation grooves formed in the fourth metal plate, the fourth metal plate is a rectangular plate, the front end face of the fourth metal plate is flush with the front end face of the first metal plate, the rear end face of the fourth metal plate is flush with the rear end face of the first metal plate, the left end face of the fourth metal plate is flush with the left end face of the first metal plate, the right end face of the fourth metal plate is flush with the right end face of the third metal plate, the lower end face of the fourth metal plate is attached to the upper end face of the first metal plate, the upper end face of the second metal plate and the upper end face of the third metal plate, the structures and parameters of the forty radiation grooves are completely consistent, the forty radiation grooves are arranged at equal intervals according to left-to-right sequences, four output ports of the rectangular coaxial feed network, one-to-eight output ports of the four-one-to-eight output ports of the four-to-eight-one-nine-to-one power-to one power-nine power-to one power-to the output ports of the four-to the power-nine-to the power network; when excitation signals are fed in from the input port of the first magic T, the first magic T distributes power of the excitation signals input into the first magic T to obtain three paths of signals, and the three paths of signals are output through three output ports of the three paths of signals, wherein the signals output by the third output port of the first magic T are transmitted to the seventh wave absorbing device through the fifth waveguide channel and the sixth waveguide channel to be absorbed, and the signals output by the first output port of the first magic T enter the first coupler through the first port of the first coupler to be transmitted to the second port, the third port and the fourth port of the first coupler to be output after the power distribution; the signal output by the second output port of the first magic T enters the second coupler through the first port of the second coupler to be transmitted to the second port, the third port and the fourth port of the second coupler to be output after power distribution, wherein the signal output by the second port of the first coupler is transmitted to the first wave absorbing device to be absorbed, the signal output by the third port of the first coupler is transmitted to the fourth phase shifter through the second single-ridge waveguide adapter, the twelfth single-ridge waveguide adapter and the twelfth single-ridge waveguide adapter, the fourth phase shifter outputs three paths of signals obtained after the power distribution of the signal input into the third coupler to the third coupler through the first port, the second port and the third port respectively after the phase distribution of the signal input into the fourth phase shifter, wherein the signal output by the third port of the third coupler is transmitted to the third wave absorbing device to be absorbed, the signal output by the second port of the third coupler enters the third phase shifter to be output at the second port of the third phase shifter after phase conversion, the signal output by the second port of the third phase shifter is transmitted to the input port of the first one-to-two power divider through the fifteenth double-ridge waveguide adapter and the seventh double-ridge waveguide adapter, the signal input into the first one-to-two power divider is output through the two output ports of the first one-to-two power divider after power distribution, the signal output by the two output ports of the first one-to-two power divider is transmitted to free space through the two radiation slots connected with the two radiation slots, the signal output by the first port of the third coupler is transmitted to the first port of the first waveguide channel through the second eleventh single-ridge waveguide adapter, the eleventh single-ridge waveguide adapter and the first single-ridge waveguide adapter, the signal transmitted to the first port of the first waveguide channel is output through the second port of the first waveguide channel, the signal output by the second port of the first waveguide channel is transmitted to the input port of the first one-to-one three-way power divider through the first two-ridge waveguide adapter and the eighth two-ridge waveguide adapter, the signal received by the input port of the first one-to-three-way power divider is transmitted to the three output ports of the first one-to-three-way power divider after being distributed by power, and the signal output by the three output ports of the first one-to-three-way power divider is transmitted to a free space through three radiation slots connected with the first one-to-three radiation slots; the signal output by the fourth port of the first coupler is absorbed by the fourth wave absorbing device, the signal output by the third port of the fourth coupler is transmitted to the second port of the first phase shifter through the second single-ridge waveguide adapter, the thirteenth single-ridge waveguide adapter and the fourth single-ridge waveguide adapter, the signal received by the second port of the fourth coupler is output through the first output port of the fourth phase shifter after being subjected to power distribution, the signal output by the first output port of the first phase shifter is transmitted to the second port of the sixth phase shifter through the second port of the sixth phase shifter after being subjected to power distribution, the signal output by the third port of the fourth coupler is transmitted to the second port of the sixth phase shifter through the second port of the sixth phase shifter after being subjected to power distribution, and the signal output by the third port of the fourth phase shifter is transmitted to the sixth phase shifter after being subjected to the sixth phase conversion, and the signal output by the sixth phase shifter is transmitted to the sixth phase shifter after being subjected to the sixth phase conversion; the signal output by the fourth port of the fourth coupler is transmitted to the first port of the second waveguide channel through the second fifteenth single-ridge waveguide adapter, the fifteenth single-ridge waveguide adapter and the fifth single-ridge waveguide adapter, the signal received by the first port of the second waveguide channel is output at the second port of the second waveguide channel, the signal output by the second port of the second waveguide channel is transmitted to the input port of the first one-to-one nine-power divider through the third double-ridge waveguide adapter and the tenth double-ridge waveguide adapter, the signal received by the input port of the first one-to-one nine-power divider is distributed and then is output at nine output ports of the first one-to-one nine-power divider, and the signal output by the nine output ports of the first one-to-one nine-power divider is transmitted to the free space through nine radiation grooves connected with the first one-to-one nine radiation grooves; the signal output by the second port of the second coupler is transmitted to the second wave absorbing device to be absorbed, the signal output by the third port of the second coupler is transmitted to the second port of the sixth phase shifter through the seventh single-ridge waveguide adapter, the seventeenth single-ridge waveguide adapter and the seventeenth single-ridge waveguide adapter, the phase of the signal input by the sixth phase shifter is converted and then is output at the first port of the sixth phase shifter, the signal output by the first port of the sixth phase shifter is input to the fifth coupler through the fourth port of the fifth coupler, the fifth coupler distributes the power of the signal input by the fifth coupler and then outputs the power of the signal at the first port, the second port and the third port of the fifth coupler, the signal output by the third port of the fifth coupler is transmitted to the fifth wave absorbing device to be absorbed, the signal output by the second port of the fifth coupler is transmitted to the first port of the fifth phase shifter, the signal input by the fifth phase shifter is phase-converted and then output at the second port of the fifth phase shifter, the signal output by the second port of the fifth phase shifter is transmitted to the input port of the second one-to-two power divider through the sixteenth double-ridge waveguide adapter and the eleventh double-ridge waveguide adapter, the signal input by the input port of the second one-to-two power divider is subjected to power distribution, and then is transmitted to free space through two radiation grooves connected with the two output ports of the second one-to-two power divider; the signal output by the first port of the fifth coupler is transmitted to the first port of the third waveguide channel through the second sixteen single-ridge waveguide adapter, the sixteenth single-ridge waveguide adapter and the sixth single-ridge waveguide adapter, the signal received by the first port of the third waveguide channel is output at the second port of the third waveguide channel, the signal output by the second port of the third waveguide channel is transmitted to the input port of the second one-third power divider through the fourth double-ridge waveguide adapter and the twelfth double-ridge waveguide adapter, the signal received by the input port of the second one-third power divider is output at the three output ports of the second one-third power divider through power distribution, and the signal output by the three output ports of the second one-third power divider is transmitted to a free space through three radiation slots connected with the third radiation slots; the signal output by the fourth port of the second coupler is transmitted to the first port of the sixth coupler through the eighth single-ridge waveguide adapter, the eighteenth single-ridge waveguide adapter and the twenty-eighth single-ridge waveguide adapter, the signal received by the first port of the sixth coupler is respectively output at the second port, the third port and the fourth port after being subjected to power distribution, the signal output by the second port of the sixth coupler is absorbed through the sixth wave absorbing device, the signal output by the third port of the sixth coupler is transmitted to the second port of the second phase shifter through the twenty-ninth single-ridge waveguide adapter, the nineteenth single-ridge waveguide adapter and the ninth single-ridge waveguide adapter, the second phase shifter converts the phase of the signal received by the second port and outputs the signal at the first port, the signal output by the first port of the second phase shifter is transmitted to the input port of the second divide-by-six power divider through the fifth double-ridge waveguide adapter and the thirteenth double-ridge waveguide adapter, the second divide-by-six power divider distributes the power of the signal received by the input port and outputs the signal at the six output ports, and the signal output by the six output ports of the second divide-by-six power divider is transmitted to a free space through six radiation slots connected with the six radiation slots; the signal obtained from the fourth port of the sixth coupler is transmitted to the first port of the fourth waveguide channel through the thirty-first ridge waveguide adapter, the twenty-first ridge waveguide adapter and the tenth single ridge waveguide adapter, the signal received by the first port of the fourth waveguide channel is transmitted to the second port of the fourth waveguide channel for output, the signal output by the second port of the fourth waveguide channel is transmitted to the input port of the second ninth power divider through the sixth double ridge waveguide adapter and the fourteenth double ridge waveguide adapter, the signal received by the input port of the second ninth power divider is output at nine output ports of the second power divider after power distribution, and the signal output by the nine output ports of the second power divider is transmitted to free space through nine radiation slots connected with the ninth radiation slots.
Compared with the prior art, the invention has the advantages that the complementary square antenna is formed by the feed network and the radiation network which are laminated in sequence from bottom to top, the feed network is used for transmitting electromagnetic waves with amplitude distribution and phase distribution required by converting an input excitation signal into the complementary square antenna to the radiation network, the radiation network is used for transmitting the electromagnetic waves transmitted by the feed network to the radiation network to free space, and the feed network is a mixed feed network based on a waveguide structure and a coaxial structure, so that the complementary square antenna has wider bandwidth and higher efficiency and can be applied to wide bandwidth and high gain scenes.
Drawings
Fig. 1 is an exploded view of a cut-to-the-square antenna of the present invention;
FIG. 2 is a block diagram of a first waveguide feed network of a cosecant square antenna of the present invention;
FIG. 3 is a block diagram of a rectangular coaxial feed network for a cut-to-square antenna of the present invention;
FIG. 4 is a block diagram of a second waveguide feed network of the cosecant square antenna of the present invention;
FIG. 5 is a simulated gain curve, a true measured gain curve, and an efficiency plot for a cosecant square antenna of the present invention;
fig. 6 is a graph of simulated and truly measured reflection coefficients for a cosecant square antenna of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Examples: a secant square antenna includes a feed network for transmitting electromagnetic waves of amplitude distribution and phase distribution required for converting an input excitation signal into the secant square antenna to a radiation network 1, and a radiation network 1 for radiating the electromagnetic waves transmitted thereto to free space, which are stacked in order from bottom to top, the feed network being a hybrid feed network based on a waveguide structure and a coaxial structure.
As shown in fig. 1 to 4, in the present embodiment, the feed network includes a first waveguide feed network 2, a rectangular coaxial feed network 3, and a second waveguide feed network 4 arranged in parallel from left to right; the first waveguide feed network 2 includes a first metal plate 5, a first magic T6, two couplers, two phase shifters, two wave absorbing devices, ten single-ridge waveguide adapters, six double-ridge waveguide adapters, and four waveguide channels, the first metal plate 5 is a rectangular plate, in the first waveguide feed network 2, the first magic T6, two couplers, two phase shifters, two wave absorbing devices, ten single-ridge waveguide adapters, six double-ridge waveguide adapters, and four waveguide channels are all provided on the first metal plate 5, two couplers in the first waveguide feed network 2 each have four ports, which are referred to as a first port, a second port, a third port, and a fourth port, two couplers in the first waveguide feed network 2 are referred to as a first coupler 7 and a second coupler 8, respectively, two phase shifters in the first waveguide feed network 2 each have two ports, the two ports are called a first port and a second port, the two phase shifters in the first waveguide feed network 2 are called a first phase shifter 9 and a second phase shifter 10 respectively, the two wave absorbing devices in the first waveguide feed network 2 are called a first wave absorbing device 11 and a second wave absorbing device 12 respectively, ten single-ridge waveguide adapters in the first waveguide feed network 2 each have two ports, the two ports of each single-ridge waveguide adapter are called a first port and a second port respectively, the ten single-ridge waveguide adapters in the first waveguide feed network 2 are called a first single-ridge waveguide adapter 13, a second single-ridge waveguide adapter 14, a third single-ridge waveguide adapter 15, a fourth single-ridge waveguide adapter 16, a fifth single-ridge waveguide adapter 17, a sixth single-ridge waveguide adapter 18, a seventh single-ridge waveguide adapter 19, the eighth single-ridge waveguide adapter 20, the ninth single-ridge waveguide adapter 21 and the tenth single-ridge waveguide adapter 22 are provided with two ports, namely a first port and a second port, respectively, the six double-ridge waveguide adapters in the first waveguide feed network 2 are respectively called a first double-ridge waveguide adapter 23, a second double-ridge waveguide adapter 24, a third double-ridge waveguide adapter 25, a fourth double-ridge waveguide adapter 26, a fifth double-ridge waveguide adapter 27 and a sixth double-ridge waveguide adapter 28, the four waveguide channels in the first waveguide feed network 2 are respectively provided with two ports, namely a first port and a second port, the four waveguide channels in the first waveguide feed network 2 are respectively called a first waveguide channel 29, a second waveguide channel 30, a third waveguide channel 31 and a fourth waveguide channel 32, the first magic T6 is arranged at the center of the first metal plate 5, and is provided with a first input port, a third output port and a third magic T6 are respectively, and a first output port and a third input port are respectively; the first coupler 7 and the second coupler 8 are axisymmetric about the central axis of the first metal plate 5, the first phase shifter 9 and the second phase shifter 10 are axisymmetric about the central axis of the first metal plate 5, the first wave absorbing device 11 and the second wave absorbing device 12 are axisymmetric about the central axis of the first metal plate 5, the first single-ridge waveguide adapter 13 and the sixth single-ridge waveguide adapter 18 are axisymmetric about the central axis of the first metal plate 5, the second single-ridge waveguide adapter 14 and the seventh single-ridge waveguide adapter 19 are axisymmetric about the central axis of the first metal plate 5, the third single-ridge waveguide adapter 15 and the eighth single-ridge waveguide adapter 20 are axisymmetric about the central axis of the first metal plate 5, the fourth single-ridge waveguide adapter 16 and the ninth single-ridge waveguide adapter are axisymmetric about the central axis of the first metal plate 5, the fifth single-ridge waveguide adapter 17 and the tenth single-ridge waveguide adapter 22 are axisymmetric about the central axis of the first metal plate 5, the first double-ridge waveguide adapter 23 and the fourth double-ridge waveguide adapter 26 are axisymmetric about the central axis of the first metal plate 5, the third double-ridge waveguide adapter 24 and the fourth double-ridge waveguide adapter 30 are axisymmetric about the central axis of the first metal plate 5, the third double-ridge waveguide adapter 30 and the fourth double-ridge waveguide adapter 30 are axisymmetric about the central axis of the first metal plate 25 and the third double-ridge waveguide adapter 30; the input port 601 of the first magic T6 is connected to an external input signal, the first output port 602 of the first magic T6 is connected to the first port 701 of the first coupler 7, the second output port 603 of the first magic T6 is connected to the first port 801 of the second coupler 8, the second port 702 of the first coupler 7 is connected to the first absorbing device 11, the third port 703 of the first coupler 7 is connected to the first port of the second single-ridge waveguide adapter 14, the fourth port 704 of the first coupler 7 is connected to the first port of the third single-ridge waveguide adapter 15, the second port 802 of the second coupler 8 is connected to the second absorbing device 12, the third port 803 of the second coupler 8 is connected to the first port of the seventh single-ridge waveguide adapter 19, the fourth port 804 of the second coupler 8 is connected to the first port of the eighth single-ridge waveguide adapter 20, the first phase shifter 9 is located on the left side of the first coupler 7, the first port 901 of the first phase shifter 9 is connected to the first port of the second dual-ridge waveguide adapter 24, the second port 902 of the first phase shifter 9 is connected to the first port of the fourth single-ridge waveguide adapter 16, the first port 1001 of the second phase shifter 10 is connected to the first port of the fifth dual-ridge waveguide adapter 27, the second port 1002 of the second phase shifter 10 is connected to the first port of the ninth single-ridge waveguide adapter 21, the first waveguide channel 29 is located below the first coupler 7, the first port 291 of the first waveguide channel 29 is connected to the first port of the first single-ridge waveguide adapter 13, the second port 292 of the first waveguide channel 29 is connected to the first port of the first dual-ridge waveguide adapter 23, the second waveguide channel 30 is located on the left side of the first phase shifter 9, the first port 301 of the second waveguide channel 30 is connected to the first port of the fifth single-ridge waveguide adapter 17, the second port 302 of the second waveguide channel 30 is connected to the first port of the third dual-ridge waveguide adapter 25; the first port 311 of the third waveguide channel 31 is connected to the first port of the sixth single-ridge waveguide adapter 18, the second port 312 of the third waveguide channel 31 is connected to the first port of the fourth double-ridge waveguide adapter 26, the fourth waveguide channel 32 is located on the right side of the second phase shifter 10, the first port 321 of the fourth waveguide channel 32 is connected to the first port of the tenth single-ridge waveguide adapter 22, and the second port 322 of the fourth waveguide channel 32 is connected to the first port of the sixth double-ridge waveguide adapter 28;
The rectangular coaxial feed network 3 comprises a second metal plate 33, two one-to-two power dividers, two one-to-three power dividers, two one-to-six power dividers, two one-to-nine power dividers, ten single-ridge waveguide adapters, eight double-ridge waveguide adapters and a waveguide channel, wherein the second metal plate 33 is a rectangular plate, the second metal plate 33 is positioned on the right side of the first metal plate 5, the left end face of the second metal plate 33 is attached to the right end face of the first metal plate 5, the front end face of the second metal plate 33 is positioned on the same plane as the front end face of the first metal plate 5, the rear end face of the second metal plate 33 is positioned on the same plane as the rear end face of the first metal plate 5, the upper end face of the second metal plate 33 is positioned on the same plane as the upper end face of the first metal plate 5, the lower end face of the second metal plate 33 is positioned on the same plane as the lower end face of the first metal plate 5, the two power dividers of the rectangular coaxial feed network 3, the two power dividers of the rectangular coaxial feed network 3 are respectively called a first power divider 34 and a second power divider 35, the two power dividers of the rectangular coaxial feed network 3 are respectively provided with an input port and three output ports, the two power dividers of the rectangular coaxial feed network 3 are respectively called a first power divider 36 and a second power divider 37, the two power dividers of the rectangular coaxial feed network 3 are respectively called a first power divider 34 and six output ports, the two first and second power splitters of the rectangular coaxial feed network 3 are respectively referred to as a first power splitter 38 and a second power splitter 39, the two first power splitters of the rectangular coaxial feed network 3 each have one input port and nine output ports, the two first power splitters of the rectangular coaxial feed network 3 are respectively referred to as a first power splitter 40 and a second power splitter 41, the ten single-ridge waveguide adapters of the rectangular coaxial feed network 3 each have two ports, the two ports are respectively a first port and a second port, the ten single-ridge waveguide adapters of the rectangular coaxial feed network 3 are respectively referred to as an eleventh single-ridge waveguide adapter 42, a twelfth single-ridge waveguide adapter 43, a thirteenth single-ridge waveguide adapter 44, a fourteenth single-ridge waveguide adapter 45, a fifteenth single-ridge waveguide adapter 46, a sixteenth single-ridge waveguide adapter 47, a seventeenth single-ridge waveguide adapter 48, an eighteenth single-ridge waveguide adapter 49, a nineteenth single-ridge waveguide adapter 50 and a twenty-first double-ridge waveguide adapter 53, a seventeenth double-ridge waveguide adapter 60, a seventeenth double-waveguide adapter 60, a nineteenth double-ridge waveguide adapter 53 and a seventeenth double-waveguide adapter 60, a seventeenth double-ridge waveguide adapter 60, a nineteenth double-waveguide adapter 60, a twenty-ridge waveguide adapter 53 and a twenty-first double-waveguide adapter 53, a seventeenth double-ridge waveguide adapter 60, a seventeenth double-waveguide adapter and a double-waveguide adapter 60 are respectively; seventh double-ridge waveguide adapter 52 and eleventh double-ridge waveguide adapter 56 are axisymmetric about second metal plate 33, eighth double-ridge waveguide adapter 53 and twelfth double-ridge waveguide adapter 57 are axisymmetric about second metal plate 33, ninth double-ridge waveguide adapter 54 and thirteenth double-ridge waveguide adapter 58 are axisymmetric about second metal plate 33, tenth double-ridge waveguide adapter 55 and fourteenth double-ridge waveguide adapter 59 are axisymmetric about second metal plate 33, eleventh single-ridge waveguide adapter 42 and sixteenth single-ridge waveguide adapter 47 are axisymmetric about second metal plate 33, twelfth single-ridge waveguide adapter 43 and seventeenth single-ridge waveguide adapter 48 are axisymmetric about second metal plate 33, thirteenth single-ridge waveguide adapter 44 and thirteenth single-ridge waveguide adapter 49 are axisymmetric about second metal plate 33, fourteenth single-ridge waveguide adapter 45 and thirteenth single-ridge waveguide adapter 50 are axisymmetric about second metal plate 33, fifteenth single-waveguide adapter 46 and twenty-ridge waveguide adapter 59 are axisymmetric about second metal plate 33, fifteenth single-ridge waveguide adapter 46 and twenty-ridge waveguide adapter 46 are axisymmetric about second metal plate 33, first waveguide adapter and seventeenth splitter 35 are axisymmetric about second metal plate 33, first splitter and seventeenth splitter 35 are axisymmetric about second metal plate 35 and third metal splitter 35 are axisymmetric about second metal plate 33, first splitter and third splitter 35 are axisymmetric about second metal plate 33, first splitter 35 and third splitter 60 are axisymmetric about second metal splitter 35 and third metal splitter 60 are axisymmetric about second metal plate 33, first splitter and third splitter 35 is symmetric about second metal splitter 35 and third axial splitter 60 is symmetric about second metal plate 33, the first port of the eleventh single-ridge waveguide adapter 42 is connected to the second port of the first single-ridge waveguide adapter 13, the first port of the twelfth single-ridge waveguide adapter 43 is connected to the second port of the second single-ridge waveguide adapter 14, the first port of the thirteenth single-ridge waveguide adapter 44 is connected to the second port of the third single-ridge waveguide adapter 15, the first port of the fourteenth single-ridge waveguide adapter 45 is connected to the second port of the fourth single-ridge waveguide adapter 16, the first port of the fifteenth single-ridge waveguide adapter 46 is connected to the second port of the fifth single-ridge waveguide adapter 17, the first port of the sixteenth single-ridge waveguide adapter 47 is connected to the second port of the sixth single-ridge waveguide adapter 18, the first port of the seventeenth single-ridge waveguide adapter 48 is connected to the second port of the seventh single-ridge waveguide adapter 19, the first port of the eighteenth single-ridge waveguide adapter 49 is connected to the second port of the eighth single-ridge waveguide adapter 20, the first port of the nineteenth single-ridge waveguide adapter 50 is connected to the second port of the ninth single-ridge waveguide adapter 21, the first port of the twenty-first single-ridge waveguide adapter 51 is connected to the second port of the tenth single-ridge waveguide adapter 22, the first port of the seventh double-ridge waveguide adapter 52 is connected to the input port 340 of the first one-to-two power divider 34, the first port of the eighth double-ridge waveguide adapter 53 is connected to the second port of the first double-ridge waveguide adapter 23, the second port of the eighth double-ridge waveguide adapter 53 is connected to the input port 360 of the first one-to-three power divider 36, the first port of the ninth double-ridge waveguide adapter 54 is connected to the second port of the second double-ridge waveguide adapter 24, the second port of the ninth double-ridge waveguide adapter 54 is connected to the input port 380 of the first one-to-six power divider 38, the first port of the tenth dual ridge waveguide adapter 55 is connected to the second port of the third dual ridge waveguide adapter 25, the second port of the tenth dual ridge waveguide adapter 55 is connected to the input port 400 of the first one-to-one nine-power divider 40, the first port of the eleventh dual ridge waveguide adapter 56 is connected to the input port of the second one-to-two-power divider 35, the first port of the twelfth dual ridge waveguide adapter 57 is connected to the second port of the fourth dual ridge waveguide adapter 26, the second port of the tenth dual ridge waveguide adapter 57 is connected to the input port of the second one-to-three-power divider 37, the first port of the thirteenth dual ridge waveguide adapter 58 is connected to the second port of the fifth dual ridge waveguide adapter 27, the second port of the thirteenth dual ridge waveguide adapter 58 is connected to the input port of the second one-to-six-power divider 39, the first port of the fourteenth double-ridge waveguide adapter 59 is connected with the second port of the sixth double-ridge waveguide adapter 28, the second port of the fourteenth double-ridge waveguide adapter 59 is connected with the input port of the second first power divider/nine-divider 41, the first power divider/nine-divider 40, the first power divider/six-divider 38, the first power divider/three-divider 36 and the first power divider/two-divider 34 are positioned on the left side of the central axis of the second metal plate 33 and are sequentially arranged from left to right, and the second power divider/two-divider 35, the second power divider/three-divider 37, the second power divider/six-divider 39 and the second power divider/nine-divider 41 are positioned on the right side of the central axis of the second metal plate 33 and are sequentially arranged from left to right, and the second power divider/two-divider 35 is positioned on the right side of the first power divider/two-divider 34;
The second waveguide feeding network 4 includes a third metal plate 61, four couplers, five wave-absorbing devices, four phase shifters, one waveguide channel, ten single-ridge waveguide adapters, and two double-ridge waveguide adapters, the third metal plate 61 is a rectangular plate, the third metal plate 61 is located on the right side of the second metal plate 33, the left end face of the third metal plate 61 is bonded to the right end face of the second metal plate 33, the front end face of the third metal plate 61 is located on the same plane as the front end face of the second metal plate 33, the rear end face of the third metal plate 61 is located on the same plane as the rear end face of the second metal plate 33, the upper end face of the third metal plate 61 is located on the same plane as the upper end face of the second metal plate 33, the lower end face of the third metal plate 61 is located on the same plane as the lower end face of the second metal plate 33, four couplers, five wave-absorbing devices, four phase shifters, ten single-ridge waveguide adapters and two double-ridge waveguide adapters of the second waveguide feed network 4 are all arranged on the third metal plate 61, the four couplers of the second waveguide feed network 4 are provided with a first port, a second port, a third port and a fourth port, the four couplers of the second waveguide feed network 4 are respectively called a third coupler 62, a fourth coupler 63, a fifth coupler 64 and a sixth coupler 65, and the five wave-absorbing devices of the second waveguide feed network 4 are respectively called a third wave-absorbing device 66, a fourth wave-absorbing device 67, a fifth wave-absorbing device 68, a sixth wave-absorbing device 69 and a seventh wave-absorbing device 70; the four phase shifters of the second waveguide feed network 4 each have a first port and a second port, the four phase shifters of the second waveguide feed network 4 are referred to as a third phase shifter 71, a fourth phase shifter 72, a fifth phase shifter 73, and a sixth phase shifter 74, the waveguide channels of the second waveguide feed network 4 have a first port and a second port, the waveguide channels of the second waveguide feed network 4 are referred to as a sixth waveguide channel 75, the ten single-ridge waveguide switches of the second waveguide feed network 4 have a first port and a second port, the ten single-ridge waveguide switches of the second waveguide feed network 4 are referred to as a twenty-first single-ridge waveguide switch 76, a twenty-first single-ridge waveguide switch 77, a twenty-third single-ridge waveguide switch 78, a twenty-fourth single-ridge waveguide switch 79, a twenty-fifth single-ridge waveguide switch 80, a twenty-first single-ridge waveguide switch 81, a twenty-seventh single-ridge waveguide switch 82, a twenty-eighth single-ridge waveguide switch 83, a twenty-ninth single-ridge waveguide switch 84, and a thirty-first single-ridge switch 85, the two double-ridge waveguide adapters of the second waveguide feeding network 4 each have a first port and a second port, the two double-ridge waveguide adapters of the second waveguide feeding network 4 are referred to as a fifteenth double-ridge waveguide adapter 86 and a sixteenth double-ridge waveguide adapter 87, respectively, the third coupler 62 and the fifth coupler 64 are axisymmetric about the central axis of the third metal plate 61, the fourth coupler 63 and the sixth coupler 65 are axisymmetric about the central axis of the third metal plate 61, the third absorbing device 66 and the fifth absorbing device 68 are axisymmetric about the central axis of the third metal plate 61, the fourth absorbing device 67 and the sixth absorbing device 69 are axisymmetric about the central axis of the third metal plate 61, the third phase shifter 71 and the fifth phase shifter 73 are axisymmetric about the central axis of the third metal plate 61, the fourth phase shifter 72 and the sixth phase shifter 74 are axisymmetric about the central axis of the third metal plate 61, the twenty-first one-ridge waveguide adapter 76 and the twenty-first one-ridge waveguide adapter 81 are axisymmetric about the central axis of the third metal plate 61, the twenty-second one-ridge waveguide adapter 77 and the twenty-first one-ridge waveguide adapter 82 are axisymmetric about the central axis of the third metal plate 61, the twenty-third one-ridge waveguide adapter 78 and the twenty-first one-ridge waveguide adapter 83 are axisymmetric about the central axis of the third metal plate 61, the twenty-fourth one-ridge waveguide adapter 79 and the twenty-first one-ridge waveguide adapter 84 are axisymmetric about the central axis of the third metal plate 61, the twenty-fifth one-ridge waveguide adapter 80 and the thirty-first one-ridge waveguide adapter 85 are axisymmetric about the central axis of the third metal plate 61, and the twenty-fifth one-second one-ridge waveguide adapter 86 and the sixteenth one-ridge waveguide adapter 87 are axisymmetric about the central axis of the third metal plate 61; the first port of the sixth waveguide channel 75 is connected to the seventh wave-absorbing device 70, and the second port of the sixth waveguide channel 75 is connected to the second port of the fifth waveguide channel 60; a second port of the fifteenth dual-ridge waveguide adapter 86 is connected to a second port of the seventh dual-ridge waveguide adapter 52; a second port of the twenty-first single-ridge waveguide adapter 76 is connected to a second port of the eleventh single-ridge waveguide adapter 42, a second port of the twenty-second single-ridge waveguide adapter 77 is connected to a second port of the twelfth single-ridge waveguide adapter 43, a second port of the twenty-third single-ridge waveguide adapter 78 is connected to a second port of the thirteenth single-ridge waveguide adapter 44, a second port of the twenty-fourth single-ridge waveguide adapter 79 is connected to a second port of the fourteenth single-ridge waveguide adapter 45, a second port of the twenty-fifth single-ridge waveguide adapter 80 is connected to a second port of the fifteenth single-ridge waveguide adapter 46, and a second port of the sixteenth double-ridge waveguide adapter 87 is connected to a second port of the eleventh double-ridge waveguide adapter 56; a second port of the twenty-eighth single-ridge waveguide transition 81 is connected to a second port of the sixteenth single-ridge waveguide transition 47, a second port of the twenty-seventh single-ridge waveguide transition 82 is connected to a second port of the seventeenth single-ridge waveguide transition 48, a second port of the twenty-eighth single-ridge waveguide transition 83 is connected to a second port of the eighteenth single-ridge waveguide transition 49, a second port of the twenty-ninth single-ridge waveguide transition 84 is connected to a second port of the nineteenth single-ridge waveguide transition 50, a second port of the thirty-first single-ridge waveguide transition 85 is connected to a second port of the twenty-first single-ridge waveguide transition 51, a second port 712 of the third phase shifter 71 is connected to a first port of the fifteenth double-ridge waveguide transition 86, a second port 722 of the fourth phase shifter 72 is connected to a first port of the twenty-second single-ridge waveguide transition 77, the second port 732 of the fifth phase shifter 73 is connected to the first port of the sixteenth double-ridge waveguide adapter 87, the second port of the sixth phase shifter 74 is connected to the first port of the twenty-seventh single-ridge waveguide adapter 82, the third coupler 62 is positioned on the left side of the center axis of the third metal plate 61, the first port 621 of the third coupler 62 is connected to the first port of the twenty-first single-ridge waveguide adapter 76, the second port 622 of the third coupler 62 is connected to the first port 711 of the third phase shifter 71, the third port 623 of the third coupler 62 is connected to the third absorbing device 66, the fourth port 624 of the third coupler 62 is connected to the first port 721 of the fourth phase shifter 72, the fourth coupler 63 is positioned on the left side of the third coupler 62, the first port 631 of the fourth coupler 63 is connected to the first port of the twenty-third single-ridge waveguide adapter 78, the second port 632 of the fourth coupler 63 is connected to the fourth absorbing device 67, the third port 633 of the fourth coupler 63 is connected to the first port of the twenty-fourth single-ridge waveguide adapter 79, the fourth port 634 of the fourth coupler 63 is connected to the first port of the twenty-fifth single-ridge waveguide adapter 80, the fifth coupler 64 is located on the right side of the center axis of the third metal plate 61, the first port 641 of the fifth coupler 64 is connected to the first port of the twenty-sixth single-ridge waveguide adapter 81, the second port 642 of the fifth coupler 64 is connected to the first port 731 of the fifth phase shifter 73, the third port 643 of the fifth coupler 64 is connected to the fifth absorbing device 68, the fourth port 644 of the fifth coupler 64 is connected to the first port of the sixth phase shifter 74, the sixth coupler 65 is located on the right side of the fifth coupler 64, the first port 651 of the sixth coupler 65 is connected to the first port 653 of the twenty-eighth single-ridge waveguide adapter 83, the second port 652 of the sixth coupler 65 is connected to the sixth absorbing device 69, the third port 643 of the sixth coupler 65 is connected to the twenty-fifth single-ridge waveguide adapter 85, and the fourth port 654 of the thirty-fifth coupler 64 is connected to the fourth port bridge waveguide adapter 85;
The radiation network 1 comprises a fourth metal plate 88 and forty radiation slots 89 formed on the fourth metal plate 88, the fourth metal plate 88 is a rectangular plate, the front end face of the fourth metal plate 88 is flush with the front end face of the first metal plate 5, the rear end face of the fourth metal plate 88 is flush with the rear end face of the first metal plate 5, the left end face of the fourth metal plate 88 is flush with the left end face of the first metal plate 5, the right end face of the fourth metal plate 88 is flush with the right end face of the third metal plate 61, the lower end face of the fourth metal plate 88 is attached to the upper end face of the first metal plate 5, the upper end face of the second metal plate 33 and the upper end face of the third metal plate 61, the structure and parameters of the forty radiation slots 89 are completely consistent, the forty radiation slots 89 are arranged at equal intervals in sequence from left to right, the four output ports of two one-to-left, six output ports of two one-to-three power splitters, twelve output ports of two one-to six-to one power splitters, twelve output ports of two one-to nine power splitters of the rectangular coaxial feed network 3, and forty output ports of one-to one output ports of the forty-to one power splitters are connected with the forty radiation networks.
When an excitation signal is fed in from the input port 601 of the first magic T6, the first magic T6 distributes power of the excitation signal input therein to obtain three paths of signals, and the three paths of signals are output through three output ports of the three paths of signals respectively, wherein the signals output by the third output port 604 of the first magic T6 are transmitted to the seventh wave absorbing device 70 through the fifth waveguide channel 60 and the sixth waveguide channel 75 to be absorbed, and the signals output by the first output port 602 of the first magic T6 enter the first coupler 7 through the first port 701 of the first coupler 7 to be transmitted to the second port 702, the third port and the fourth port of the first coupler 7 to be output after being distributed; the signal output by the second output port 603 of the first magic T6 enters the second coupler 8 through the first port 801 of the second coupler 8 to be transmitted to the second port 802, the third port and the fourth port of the second coupler 8 for power distribution, wherein the signal output by the second port 702 of the first coupler 7 is transmitted to the first absorbing device 11 for absorption, the signal output by the third port 703 of the first coupler 7 is transmitted to the fourth phase shifter 72 through the second single-ridge waveguide adapter 14, the twelfth single-ridge waveguide adapter 43 and the twenty-second single-ridge waveguide adapter 77, the signal input into the fourth phase shifter 72 is transmitted to the third coupler 62 at the first port thereof after phase conversion, the third coupler 62 outputs three paths of signals obtained after power distribution of the signal input into the third coupler through the first port, the second port and the third port thereof, the signal output by the third port 623 of the third coupler 62 is transmitted to the third absorbing device 66 to be absorbed, the signal output by the second port 622 of the third coupler 62 enters the third phase shifter 71 to be phase-converted and then is output by the second port 712 of the third phase shifter 71, the signal output by the second port 712 of the third phase shifter 71 is transmitted to the input port 340 of the first one-to-two power divider 34 through the fifteenth dual-ridge waveguide adapter 86 and the seventh dual-ridge waveguide adapter 52, the signal input therein is power-distributed by the first one-to-two power divider 34 and then is output through the two output ports thereof, the signals output by the two output ports 341 and 342 of the first one-to-two power divider 34 are transmitted to the free space through the two radiation grooves 89 connected with the two output ports 621 of the first one-to-two power divider, the eleventh single-ridge waveguide adapter and the first single-ridge waveguide adapter transmit to the first port 291 of the first waveguide channel 29, the first waveguide channel 29 outputs the signal transmitted to the first port through the second port thereof, the signal output by the second port 292 of the first waveguide channel 29 is transmitted to the input port 360 of the first three-in-one-three power divider 36 through the first two-ridge waveguide adapter 23 and the eighth two-ridge waveguide adapter 53, the first three-in-one power divider 36 distributes the power of the signal received by the input port thereof and transmits the signal to the three output ports thereof for output, and the signal output by the three output ports 361, 362 and 363 of the first three-in-one-three power divider 36 is transmitted to free space through the three radiation slots 89 connected with the signal; the signal output by the fourth port 704 of the first coupler 7 is transmitted to the first port 631 of the fourth coupler 63 through the third single-ridge waveguide adapter 15, the thirteenth single-ridge waveguide adapter 44 and the thirteenth single-ridge waveguide adapter 78, the signal received by the first port of the fourth coupler 63 is respectively output at the second port, the third port and the fourth port after being subjected to power distribution by the fourth coupler 63, wherein the signal output by the second port 632 of the fourth coupler 63 is absorbed by the fourth wave absorbing device 67, the signal output by the third port 633 of the fourth coupler 63 is transmitted to the second port 902 of the first phase shifter 9 through the second fourteenth single-ridge waveguide adapter 79, the fourteenth single-ridge waveguide adapter 45 and the fourth single-ridge waveguide adapter 16, the first phase shifter 9 converts the phase of the signal received by the second port thereof and outputs the signal through the first output port thereof, the signal outputted by the first output port of the first phase shifter 9 is transmitted to the input port 380 of the first split six-power divider 38 through the second double-ridge waveguide adapter 24 and the ninth double-ridge waveguide adapter 54, the first split six-power divider 38 distributes the power of the signal received by the input port thereof and outputs the signal at the six output ports thereof, and the signals outputted by the six output ports 381, 382, 383, 384, 385 and 386 of the first split six-power divider 38 are transmitted to free space through the six radiation slots 89 connected with the signals; the signal output by the fourth port 634 of the fourth coupler 63 is transmitted to the first port 301 of the second waveguide channel 30 through the second fifteenth single-ridge waveguide adapter 80, the fifteenth single-ridge waveguide adapter 46 and the fifth single-ridge waveguide adapter 17, the signal received by the first port of the second waveguide channel 30 is output at the second port of the second waveguide channel 30, the signal output by the second port 302 of the second waveguide channel 30 is transmitted to the input port 400 of the first one-to-one ninth power divider 40 through the third double-ridge waveguide adapter 25 and the tenth double-ridge waveguide adapter 55, the signal received by the input port of the first one-to-one ninth power divider 40 is distributed and then is output at nine output ports of the first one-to-one ninth power divider 40, and the signals output by the nine output ports 401, 402, 403, 404, 405, 406, 407, 408 and 409 are transmitted to the free space through nine radiation grooves 89 connected with the first one-to-one ninth power divider 40; the signal output by the second port 802 of the second coupler 8 is transmitted to the second wave absorbing device 12 to be absorbed, the signal output by the third port 803 of the second coupler 8 is transmitted to the second port of the sixth phase shifter 74 through the seventh single-ridge waveguide adapter 19, the seventeenth single-ridge waveguide adapter 48 and the seventeenth single-ridge waveguide adapter 82, the signal input by the sixth phase shifter 74 is converted in phase and then is output at the first port thereof, the signal output by the first port of the sixth phase shifter 74 is input to the fifth coupler 64 through the fourth port 644 of the fifth coupler 64, the signal input by the fifth coupler 64 is output at the first port, the second port and the third port thereof after being distributed, the signal output by the third port 643 of the fifth coupler 64 is transmitted to the fifth wave absorbing device 68 to be absorbed, the signal output by the second port 642 of the fifth coupler 64 is transmitted to the first port 731 of the fifth phase shifter 73, the signal input thereto is converted in phase and then is output at the second port thereof, the signal output by the fifth coupler 73 is divided into two parts by the second port thereof after being converted in phase, the second port thereof is output by the fifth coupler 64 is divided into two parts and is output at the second port thereof, the second port thereof is connected with the second port 35 through the second port of the second coupler 35, the signal output by the second port of the fifth coupler 64 is divided into two parts and is output by the two-split to be transmitted through the second port of the waveguide 35; the signal output by the first port 641 of the fifth coupler 64 is transmitted to the first port 311 of the third waveguide channel 31 through the second sixteen single-ridge waveguide adapter, the sixteenth single-ridge waveguide adapter and the sixth single-ridge waveguide adapter, the signal received by the first port of the third waveguide channel 31 is output at the second port of the third waveguide channel 31, the signal output by the second port 312 of the third waveguide channel 31 is transmitted to the input port of the second one-to-three power divider 37 through the fourth double-ridge waveguide adapter 26 and the tenth double-ridge waveguide adapter 57, the signal received by the input port of the second one-to-three power divider 37 is output at the three output ports of the second one-to-three power divider 37 through power distribution, and the signal output by the three output ports of the second one-to-three power divider 37 is transmitted to free space through the three radiation slots 89 connected with the third one-to-three radiation slots; the signal output by the fourth port 804 of the second coupler 8 is transmitted to the first port 651 of the sixth coupler 65 through the eighth single-ridge waveguide adapter 20, the eighteenth single-ridge waveguide adapter 49 and the twenty-eighth single-ridge waveguide adapter 83, the signal received by the first port of the sixth coupler 65 is output at the second port, the third port and the fourth port after being subjected to power distribution by the sixth coupler 65, wherein the signal output by the second port 652 of the sixth coupler 65 is absorbed through the sixth wave absorbing device 69, the signal output by the third port 653 of the sixth coupler 65 is transmitted to the second port 1002 of the second phase shifter 10 through the twenty-ninth single-ridge waveguide adapter 84, the nineteenth single-ridge waveguide adapter 50 and the nineteenth single-ridge waveguide adapter 21, the signal output by the second phase shifter 10 is output at the first port thereof after being subjected to phase conversion by the second phase shifter 10, the signal output by the first port 1001 of the second phase shifter 10 is transmitted to the sixth power divider 39 through the fifth double-ridge waveguide adapter 27 and the thirteenth double-ridge waveguide adapter 58, and the signal output by the sixth phase shifter is transmitted to the sixth power divider 39 after being subjected to the sixth power distribution by the sixth phase divider is transmitted to the sixth power divider 39, and the signal output is freely connected to the sixth power divider output by the sixth power divider; the signal obtained by the fourth port 654 of the sixth coupler 65 is transmitted to the first port 321 of the fourth waveguide channel 32 through the thirty-first single-ridge waveguide adapter 85, the twenty-first-ridge waveguide adapter 51 and the tenth single-ridge waveguide adapter 22, the signal received by the first port of the fourth waveguide channel 32 is transmitted to the second port output of the fourth waveguide channel 32, the signal output by the second port 322 of the fourth waveguide channel 32 is transmitted to the input port of the second ninth power divider 41 through the sixth double-ridge waveguide adapter 28 and the fourteenth double-ridge waveguide adapter 59, the signal received by the input port of the second ninth power divider 41 is output at the nine output ports of the second power divider 41 after being distributed, and the signal output by the nine output ports of the second power divider 41 is transmitted to the free space through the nine radiation slots 89 connected with the signal.
The secant-square antenna of the present invention is designed as a sandwich structure based on a hybrid feed network structure composed of a waveguide structure and a rectangular coaxial structure to further reduce the antenna profile. The method is characterized in that the method comprises the steps of manufacturing the cosecant square antenna, measuring relevant parameters (gain, efficiency and reflection coefficient) of the cosecant square antenna working in an X wave band, simulating the cosecant square antenna based on HFSS software, and testing radiation performance (gain and reflection coefficient) of the cosecant square antenna by adopting a far-field antenna testing system. The simulated gain curve, the true measured gain curve and the efficiency curve of the secant square antenna of the present invention are shown in fig. 5, and the simulated and true measured reflection coefficient curve of the secant square antenna of the present invention are shown in fig. 6. Analysis of fig. 5 and 6 shows that in the frequency range of 6-7.4GHz, the peak gain, both simulated and measured, exceeds 16.5dBi, the reflection coefficient is lower than-12 dB, and the measured antenna efficiency is higher than 80%. It follows that the secant-square antenna of the present invention has broadband and high radiation performance and can be an attractive candidate for radar and base station applications.
Claims (1)
1. The cosecant square antenna is characterized by comprising a feed network and a radiation network which are laminated in sequence from bottom to top, wherein the feed network is used for transmitting electromagnetic waves with amplitude distribution and phase distribution required by converting an input excitation signal into the cosecant square antenna to the radiation network, the radiation network is used for transmitting the electromagnetic waves transmitted to the feed network to the free space, and the feed network is a hybrid feed network based on a waveguide structure and a coaxial structure;
The feed network comprises a first waveguide feed network, a rectangular coaxial feed network and a second waveguide feed network which are arranged in parallel from left to right; the first waveguide feed network comprises a first metal plate, a first magic T, two couplers, two phase shifters, two wave absorbing devices, ten single-ridge waveguide adapters, six double-ridge waveguide adapters and four waveguide channels, wherein the first metal plate is a rectangular plate, in the first waveguide feed network, the first magic T, the two couplers, the two phase shifters, the two wave absorbing devices, the ten single-ridge waveguide adapters, the six double-ridge waveguide adapters and the four waveguide channels are all arranged on the first metal plate, two couplers in the first waveguide feed network are provided with four ports, which are called a first port, a second port, a third port and a fourth port, two couplers in the first waveguide feed network are respectively called a first coupler and a second coupler, the two phase shifters in the first waveguide feed network are respectively provided with two ports, the two ports are called a first port and a second port, the two phase shifters in the first waveguide feed network are respectively called a first phase shifter and a second phase shifter, the two wave absorbing devices in the first waveguide feed network are respectively called a first wave absorbing device and a second wave absorbing device, ten single-ridge waveguide adapters in the first waveguide feed network are respectively provided with two ports, the two ports of each single-ridge waveguide adapter are respectively called a first port and a second port, the ten single-ridge waveguide adapters in the first waveguide feed network are respectively called a first single-ridge waveguide adapter, a second single-ridge waveguide adapter, a third single-ridge waveguide adapter, a fourth single-ridge waveguide adapter, a fifth single-ridge waveguide adapter, the six double-ridge waveguide adapters in the first waveguide feed network are respectively called a first double-ridge waveguide adapter, a second double-ridge waveguide adapter, a third double-ridge waveguide adapter, a fourth double-ridge waveguide adapter, a fifth double-ridge waveguide adapter and a sixth double-ridge waveguide adapter, the four waveguide channels in the first waveguide feed network are respectively provided with two ports, the two ports are respectively called a first waveguide channel, a second waveguide channel, a third waveguide channel and a fourth waveguide channel, the four waveguide channels in the first waveguide feed network are respectively called a first waveguide channel, a third waveguide channel and a fourth waveguide channel, the first waveguide channels are respectively arranged at the center of the first metal plate, the fourth waveguide channels are respectively called a first port and a second port, the four waveguide channels in the first waveguide feed network are respectively called a first waveguide channel, a second waveguide channel, a third waveguide channel and a fourth waveguide channel, the first magic T is arranged at the center of the first metal plate, and the first magic T and the third magic T are respectively provided with a first axial port, a second axial port and a third axial port; the first coupler and the second coupler are axisymmetric about the central axis of the first metal plate, the first phase shifter and the second phase shifter are axisymmetric about the central axis of the first metal plate, the first and the second wave absorbing devices are axisymmetric about the central axis of the first metal plate, the first and the sixth single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the second and the seventh single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the third and the eighth single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the fifth and the ninth single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the fifth and the seventh single-ridge waveguide adapters are axisymmetric about the central axis of the first and the second metal plate, the third and the eighth single-ridge waveguide adapters are axisymmetric about the central axis of the first metal plate, the third and the fourth waveguide adapter are axisymmetric about the central axis of the first metal plate, the fifth and the eighth single-ridge waveguide adapter are axisymmetric about the central axis of the first metal plate, the second waveguide channel and the fourth waveguide channel are axisymmetric with respect to the central axis of the first metal plate; the input port of the first magic T is connected with an external input signal, the first output port of the first magic T is connected with the first port of the first coupler, the second output port of the first magic T is connected with the first port of the second coupler, the second port of the first coupler is connected with the first wave-absorbing device, the third port of the first coupler is connected with the first port of the second single-ridge waveguide adapter, the fourth port of the first coupler is connected with the first port of the third single-ridge waveguide adapter, the second port of the second coupler is connected with the second wave-absorbing device, the third port of the second coupler is connected with the first port of the seventh single-ridge waveguide adapter, the fourth port of the second coupler is connected with the first port of the eighth single-ridge waveguide adapter, the first phase shifter is positioned at the left side of the first coupler, the first port of the first phase shifter is connected with the first port of the second double-ridge waveguide adapter, the second port of the first phase shifter is connected with the first port of the fourth single-ridge waveguide adapter, the first port of the second phase shifter is connected with the first port of the fifth double-ridge waveguide adapter, the second port of the second phase shifter is connected with the first port of the ninth single-ridge waveguide adapter, the first waveguide channel is positioned below the first coupler, the first port of the first waveguide channel is connected with the first port of the first single-ridge waveguide adapter, the second port of the first waveguide channel is connected with the first port of the first double-ridge waveguide adapter, the second waveguide channel is positioned at the left side of the first phase shifter, a first port of the second waveguide channel is connected with a first port of the fifth single-ridge waveguide adapter, and a second port of the second waveguide channel is connected with a first port of the third double-ridge waveguide adapter; the first port of the third waveguide channel is connected with the first port of the sixth single-ridge waveguide adapter, the second port of the third waveguide channel is connected with the first port of the fourth double-ridge waveguide adapter, the fourth waveguide channel is positioned on the right side of the second phase shifter, the first port of the fourth waveguide channel is connected with the first port of the tenth single-ridge waveguide adapter, and the second port of the fourth waveguide channel is connected with the first port of the sixth double-ridge waveguide adapter;
The rectangular coaxial feed network comprises a second metal plate, two one-to-two power dividers, two one-to-three power dividers, two one-to-six power dividers, two one-to-nine power dividers, ten single-ridge waveguide adapters, eight double-ridge waveguide adapters and a waveguide channel, wherein the second metal plate is a rectangular plate, the second metal plate is positioned on the right side of the first metal plate, the left end face of the second metal plate is attached to the right end face of the first metal plate, the front end face of the second metal plate is positioned on the same plane as the front end face of the first metal plate, the rear end face of the second metal plate is positioned on the same plane as the rear end face of the first metal plate, the upper end face of the second metal plate is positioned on the same plane as the upper end face of the first metal plate, the lower end face of the second metal plate is positioned on the same plane as the lower end face of the first metal plate, the two one-to-two power dividers, two one-to-three power dividers, two one-to-six power dividers, two one-to-nine power dividers, ten single-ridge waveguide adapters, eight double-ridge waveguide adapters and a waveguide channel of the rectangular coaxial feed network are all arranged on the second metal plate, the two one-to-two power dividers of the rectangular coaxial feed network are provided with an input port and two output ports, the two one-to-two power dividers of the rectangular coaxial feed network are respectively called a first one-to-two power divider and a second one-to-two power divider, the two one-to-three power dividers of the rectangular coaxial feed network are respectively provided with an input port and three output ports, the two one-to-three power dividers of the rectangular coaxial feed network are respectively called a first one-to-three power divider and a second one-to-three power divider, the two one-to-six power dividers of the rectangular coaxial feed network are respectively provided with an input port and six output ports, the two one-to-six power dividers of the rectangular coaxial feed network are respectively called a first one-to-six power divider and a second one-to-six power divider, the two one-to-nine power dividers of the rectangular coaxial feed network are respectively provided with an input port and nine output ports, the two one-to-nine power dividers of the rectangular coaxial feed network are respectively called a first one-to-nine power divider and a second one-to-nine power divider, the ten single-ridge waveguide adapters of the rectangular coaxial feed network are respectively provided with two ports, the two ports are respectively a first port and a second port, the ten single-ridge waveguide adapters of the rectangular coaxial feed network are respectively called an eleventh single-ridge waveguide adapter, a twelfth single-ridge waveguide adapter, a thirteenth single-ridge waveguide adapter, a fourteenth single-ridge waveguide adapter, a fifteenth single-ridge waveguide adapter, a sixteenth single-ridge waveguide adapter, a seventeenth single-ridge waveguide adapter, an eighteenth single-ridge waveguide adapter, a nineteenth single-ridge waveguide adapter and a twenty-first-ridge waveguide adapter, the eight double-ridge waveguide adapters of the rectangular coaxial feed network are respectively called a seventh double-ridge waveguide adapter, an eighth double-ridge waveguide adapter, a ninth double-ridge waveguide adapter, a tenth double-ridge waveguide adapter, an eleventh double-ridge waveguide adapter, a twelfth double-ridge waveguide adapter, a thirteenth double-ridge waveguide adapter and a fourteenth double-ridge waveguide adapter, the eight double-ridge waveguide adapters of the rectangular coaxial feed network are respectively provided with a first port and a second port, the eight double-ridge waveguide adapters of the rectangular coaxial feed network are respectively called a seventh double-ridge waveguide adapter, an eighth double-waveguide adapter of the rectangular coaxial feed network, the fifth waveguide channel is provided with a first port and a second port; the seventh and eleventh double-ridge waveguide adapters are axisymmetric about the second metal plate axis, the eighth and tenth double-ridge waveguide adapters are axisymmetric about the second metal plate axis, the thirteenth and thirteenth double-ridge waveguide adapters are axisymmetric about the second metal plate axis, the tenth and fourteenth double-ridge waveguide adapters are axisymmetric about the second metal plate axis, the thirteenth and thirteenth single-ridge waveguide adapters are axisymmetric about the second metal plate axis, the thirteenth and seventeenth single-ridge waveguide adapters are axisymmetric about the second metal plate axis, the first and second power splitters are axisymmetric about the second metal plate, the first port of the fifth waveguide channel is connected to the third output port of the first magic T, the first port of the eleventh single-ridge waveguide adapter is connected to the second port of the first single-ridge waveguide adapter, the first port of the twelfth single-ridge waveguide adapter is connected to the second port of the second single-ridge waveguide adapter, the first port of the thirteenth single-ridge waveguide adapter is connected to the second port of the third single-ridge waveguide adapter, the first port of the fourteenth single-ridge waveguide adapter is connected to the second port of the fourth single-ridge waveguide adapter, the first port of the fifteenth single-ridge waveguide adapter is connected to the second port of the fifth single-ridge waveguide adapter, the first port of the sixteenth single-waveguide adapter is connected to the first port of the eighth single-ridge waveguide adapter, the seventeenth single-ridge waveguide adapter is connected to the first port of the eighth single-ridge waveguide adapter, the seventeenth single-waveguide adapter is connected to the first port of the eighth single-ridge waveguide adapter, the first port of the eighth double-ridge waveguide adapter is connected with the second port of the first double-ridge waveguide adapter, the second port of the eighth double-ridge waveguide adapter is connected with the input port of the first one-to-three-power splitter, the first port of the ninth double-ridge waveguide adapter is connected with the second port of the second double-ridge waveguide adapter, the second port of the ninth double-ridge waveguide adapter is connected with the input port of the first one-to-one-six-power splitter, the first port of the tenth double-ridge waveguide adapter is connected with the second port of the third double-ridge waveguide adapter, the second port of the tenth double-ridge waveguide adapter is connected with the input port of the first one-to-three-power splitter, the first port of the eleventh double-ridge waveguide adapter is connected with the input port of the second one-to-three-power splitter, the first port of the ninth double-ridge waveguide adapter is connected with the fourth port of the fourth double-ridge waveguide adapter, the second port of the thirteenth double-ridge waveguide adapter is connected with the second one-to-four-power splitter, the thirteenth waveguide is connected with the first one-to-fourth one-to-power splitter, the thirteenth waveguide is connected with the thirteenth one-to-fourth waveguide adapter is connected with the fourth one-to-fourth port of the eighth double-ridge waveguide adapter, the first one-to-three power divider and the first one-to-two power divider are positioned at the left side of the central axis of the second metal plate and are sequentially arranged from left to right, and the second one-to-two power divider, the second one-to-three power divider, the second one-to-six power divider and the second one-to-nine power divider are all positioned at the right side of the central axis of the second metal plate and are sequentially arranged from left to right, and the second one-to-two power divider is positioned at the right side of the first one-to-two power divider;
The second waveguide feed network comprises a third metal plate, four couplers, five wave absorbing devices, four phase shifters, one waveguide channel, ten single-ridge waveguide adapters and two double-ridge waveguide adapters, wherein the third metal plate is a rectangular plate, the third metal plate is positioned on the right side of the second metal plate, the left end face of the third metal plate is attached to the right end face of the second metal plate, the front end face of the third metal plate and the front end face of the second metal plate are positioned on the same plane, the rear end face of the third metal plate and the rear end face of the second metal plate are positioned on the same plane, the upper end face of the third metal plate and the upper end face of the second metal plate are positioned on the same plane, the lower end face of the third metal plate and the lower end face of the second metal plate are located on the same plane, four couplers, five wave absorbing devices, four phase shifters, ten single-ridge waveguide adapters and two double-ridge waveguide adapters of the second waveguide feed network are all arranged on the third metal plate, the four couplers of the second waveguide feed network are provided with a first port, a second port, a third port and a fourth port, the four couplers of the second waveguide feed network are respectively called a third coupler, a fourth coupler, a fifth coupler and a sixth coupler, and the five wave absorbing devices of the second waveguide feed network are respectively called a third wave absorbing device, a fourth wave absorbing device, a fifth wave absorbing device, a sixth wave absorbing device and a seventh wave absorbing device; the four phase shifters of the second waveguide feeding network are respectively called a third phase shifter, a fourth phase shifter, a fifth phase shifter and a sixth phase shifter, the waveguide channels of the second waveguide feeding network are respectively provided with a first port and a second port, the waveguide channels of the second waveguide feeding network are respectively called a sixth waveguide channel, the ten single-ridge waveguide switches of the second waveguide feeding network are respectively provided with a first port and a second port, the ten single-ridge waveguide switches of the second waveguide feeding network are respectively called a twenty-first single-ridge waveguide switch, a twenty-second single-ridge waveguide switch, a twenty-third single-ridge waveguide switch, a twenty-fourth single-ridge waveguide switch, a twenty-fifth single-ridge waveguide switch, a twenty-sixteen single-ridge waveguide switch, a twenty-seventeenth single-ridge waveguide switch, a twenty-eighteenth single-ridge waveguide switch, a twenty-ninth single-ridge waveguide switch and a thirty-first single-ridge switch, the two double-ridge waveguide adapters of the second waveguide feeding network are respectively called a fifteenth double-ridge waveguide adapter and a sixteenth double-ridge waveguide adapter, the third coupler and the fifth coupler are symmetrical about the central axis of the third metal plate, the fourth coupler and the sixth coupler are symmetrical about the central axis of the third metal plate, the third wave absorbing device and the fifth wave absorbing device are symmetrical about the central axis of the third metal plate, the fourth and sixth wave absorbing devices are axisymmetric about the central axis of the third metal plate, the third and fifth phase shifters are axisymmetric about the central axis of the third metal plate, the fourth and sixth phase shifters are axisymmetric about the central axis of the third metal plate, the twenty-first and second sixteen-first waveguide adapters are axisymmetric about the central axis of the third metal plate, the twenty-second and second seventeenth-first waveguide adapters are axisymmetric about the central axis of the third metal plate, the twenty-first and second eighteenth-first waveguide adapters are axisymmetric about the central axis of the thirty-first waveguide of the third metal plate, the twenty-first and second eighteenth-first waveguide adapters are axisymmetric about the central axis of the third metal plate, the twenty-first and second nineteenth-first waveguide adapters are axisymmetric about the central axis of the third metal plate, the twenty-first and second waveguide adapters are axisymmetric about the central axis of the thirty-first waveguide of the third metal plate; the first port of the sixth waveguide channel is connected with the seventh wave absorbing device, and the second port of the sixth waveguide channel is connected with the second port of the fifth waveguide channel; the second port of the fifteenth double-ridge waveguide adapter is connected with the second port of the seventh double-ridge waveguide adapter; the second port of the twenty-first single-ridge waveguide adapter is connected with the second port of the eleventh single-ridge waveguide adapter, the second port of the twenty-first single-ridge waveguide adapter is connected with the second port of the twelfth single-ridge waveguide adapter, the second port of the twenty-third single-ridge waveguide adapter is connected with the second port of the thirteenth single-ridge waveguide adapter, the second port of the twenty-fourth single-ridge waveguide adapter is connected with the second port of the fourteenth single-ridge waveguide adapter, the second port of the twenty-fifth single-ridge waveguide adapter is connected with the second port of the fifteenth single-ridge waveguide adapter, and the second port of the sixteenth double-ridge waveguide adapter is connected with the second port of the eleventh double-ridge waveguide adapter; the second port of the twenty-first single-ridge waveguide adapter is connected with the second port of the sixteenth single-ridge waveguide adapter, the second port of the twenty-first single-ridge waveguide adapter is connected with the second port of the seventeenth single-ridge waveguide adapter, the second port of the twenty-eighth single-ridge waveguide adapter is connected with the second port of the eighteenth single-ridge waveguide adapter, the second port of the twenty-ninth single-ridge waveguide adapter is connected with the second port of the nineteenth single-ridge waveguide adapter, the second port of the thirty-first single-ridge waveguide adapter is connected with the second port of the twenty-first single-ridge waveguide adapter, the second port of the third phase shifter is connected with the first port of the fifteenth double-ridge waveguide adapter, the second port of the fourth phase shifter is connected with the first port of the twenty-second single-ridge waveguide adapter, the second port of the fifth phase shifter is connected with the first port of the sixteenth double-ridge waveguide adapter, the second port of the sixth phase shifter is connected with the first port of the seventeenth single-ridge waveguide adapter, the third coupler is positioned at the left side of the central axis of the third metal plate, the first port of the third coupler is connected with the first port of the eleventh single-ridge waveguide adapter, the second port of the third coupler is connected with the first port of the third phase shifter, the third port of the third coupler is connected with the third wave absorbing device, the fourth port of the third coupler is connected with the first port of the fourth phase shifter, the fourth coupler is positioned at the left side of the third coupler, the first port of the fourth coupler is connected with the first port of the thirteenth single-ridge waveguide adapter, the second port of the fourth coupler is connected with the first port of the fourth wave-absorbing device, the third port of the fifth coupler is connected with the first port of the thirteenth single-ridge waveguide adapter, the fourth port of the fourth coupler is connected with the first port of the fifteenth single-ridge waveguide adapter, the fifth coupler is positioned on the right side of the central axis of the third metal plate, the first port of the fifth coupler is connected with the first port of the thirteenth single-ridge waveguide adapter, the second port of the fifth coupler is connected with the first port of a fifth wave-absorbing device, the third port of the fifth coupler is connected with the fifth wave-absorbing device, the fourth port of the fifth coupler is connected with the first port of the sixth phase shifter, the fifth coupler is positioned on the right side of the fifth coupler, the fifth coupler is connected with the fifth port of the fifth wave-absorbing device, the fifth coupler is connected with the fifth port of the fifth single-ridge waveguide adapter, the fifth coupler is connected with the fifth port of the fifth waveguide;
The radiation network comprises a fourth metal plate and forty radiation grooves formed in the fourth metal plate, the fourth metal plate is a rectangular plate, the front end face of the fourth metal plate is flush with the front end face of the first metal plate, the rear end face of the fourth metal plate is flush with the rear end face of the first metal plate, the left end face of the fourth metal plate is flush with the left end face of the first metal plate, the right end face of the fourth metal plate is flush with the right end face of the third metal plate, the lower end face of the fourth metal plate is attached to the upper end face of the first metal plate, the upper end face of the second metal plate and the upper end face of the third metal plate, the structures and parameters of the forty radiation grooves are completely consistent, the forty radiation grooves are arranged at equal intervals according to left-to-right sequences, four output ports of the rectangular coaxial feed network, one-to-eight output ports of the four-one-to-eight output ports of the four-to-eight-one-nine-to-one power-to one power-nine power-to one power-to the output ports of the four-to the power-nine-to the power network;
When excitation signals are fed in from the input port of the first magic T, the first magic T distributes power of the excitation signals input into the first magic T to obtain three paths of signals, and the three paths of signals are output through three output ports of the three paths of signals, wherein the signals output by the third output port of the first magic T are transmitted to the seventh wave absorbing device through the fifth waveguide channel and the sixth waveguide channel to be absorbed, and the signals output by the first output port of the first magic T enter the first coupler through the first port of the first coupler to be transmitted to the second port, the third port and the fourth port of the first coupler to be output after the power distribution; the signal output by the second output port of the first magic T enters the second coupler through the first port of the second coupler to be transmitted to the second port, the third port and the fourth port of the second coupler to be output after power distribution, wherein the signal output by the second port of the first coupler is transmitted to the first wave absorbing device to be absorbed, the signal output by the third port of the first coupler is transmitted to the fourth phase shifter through the second single-ridge waveguide adapter, the twelfth single-ridge waveguide adapter and the twelfth single-ridge waveguide adapter, the fourth phase shifter outputs three paths of signals obtained after the power distribution of the signal input into the third coupler to the third coupler through the first port, the second port and the third port respectively after the phase distribution of the signal input into the fourth phase shifter, wherein the signal output by the third port of the third coupler is transmitted to the third wave absorbing device to be absorbed, the signal output by the second port of the third coupler enters the third phase shifter to be output at the second port of the third phase shifter after phase conversion, the signal output by the second port of the third phase shifter is transmitted to the input port of the first one-to-two power divider through the fifteenth double-ridge waveguide adapter and the seventh double-ridge waveguide adapter, the signal input into the first one-to-two power divider is output through the two output ports of the first one-to-two power divider after power distribution, the signal output by the two output ports of the first one-to-two power divider is transmitted to free space through the two radiation slots connected with the two radiation slots, the signal output by the first port of the third coupler is transmitted to the first port of the first waveguide channel through the second eleventh single-ridge waveguide adapter, the eleventh single-ridge waveguide adapter and the first single-ridge waveguide adapter, the signal transmitted to the first port of the first waveguide channel is output through the second port of the first waveguide channel, the signal output by the second port of the first waveguide channel is transmitted to the input port of the first one-to-one three-way power divider through the first two-ridge waveguide adapter and the eighth two-ridge waveguide adapter, the signal received by the input port of the first one-to-three-way power divider is transmitted to the three output ports of the first one-to-three-way power divider after power distribution, and the signal output by the three output ports of the first one-to-three-way power divider is transmitted to a free space through three radiation slots connected with the first one-to-three radiation slots; the signal output by the fourth port of the first coupler is absorbed by the fourth wave absorbing device, the signal output by the third port of the fourth coupler is transmitted to the second port of the first phase shifter through the second single-ridge waveguide adapter, the thirteenth single-ridge waveguide adapter and the fourth single-ridge waveguide adapter, the signal received by the second port of the fourth coupler is output through the first output port of the fourth phase shifter after being subjected to power distribution, the signal output by the first output port of the first phase shifter is transmitted to the second port of the sixth phase shifter through the second port of the sixth phase shifter after being subjected to power distribution, the signal output by the third port of the fourth coupler is transmitted to the second port of the sixth phase shifter through the second port of the sixth phase shifter after being subjected to power distribution, and the signal output by the third port of the fourth phase shifter is transmitted to the sixth phase shifter after being subjected to the sixth phase conversion, and the signal output by the sixth phase shifter is transmitted to the sixth phase shifter after being subjected to the sixth phase conversion; the signal output by the fourth port of the fourth coupler is transmitted to the first port of the second waveguide channel through the second fifteenth single-ridge waveguide adapter, the fifteenth single-ridge waveguide adapter and the fifth single-ridge waveguide adapter, the signal received by the first port of the second waveguide channel is output at the second port of the second waveguide channel, the signal output by the second port of the second waveguide channel is transmitted to the input port of the first one-to-one nine-power divider through the third double-ridge waveguide adapter and the tenth double-ridge waveguide adapter, the signal received by the input port of the first one-to-one nine-power divider is distributed and then is output at nine output ports of the first one-to-one nine-power divider, and the signal output by the nine output ports of the first one-to-one nine-power divider is transmitted to the free space through nine radiation grooves connected with the first one-to-one nine radiation grooves; the signal output by the second port of the second coupler is transmitted to the second wave absorbing device to be absorbed, the signal output by the third port of the second coupler is transmitted to the second port of the sixth phase shifter through the seventh single-ridge waveguide adapter, the seventeenth single-ridge waveguide adapter and the seventeenth single-ridge waveguide adapter, the phase of the signal input by the sixth phase shifter is converted and then is output at the first port of the sixth phase shifter, the signal output by the first port of the sixth phase shifter is input to the fifth coupler through the fourth port of the fifth coupler, the fifth coupler distributes the power of the signal input by the fifth coupler and then outputs the power of the signal at the first port, the second port and the third port of the fifth coupler, the signal output by the third port of the fifth coupler is transmitted to the fifth wave absorbing device to be absorbed, the signal output by the second port of the fifth coupler is transmitted to the first port of the fifth phase shifter, the signal input by the fifth phase shifter is phase-converted and then output at the second port of the fifth phase shifter, the signal output by the second port of the fifth phase shifter is transmitted to the input port of the second one-to-two power divider through the sixteenth double-ridge waveguide adapter and the eleventh double-ridge waveguide adapter, the signal input by the input port of the second one-to-two power divider is subjected to power distribution, and then is transmitted to free space through two radiation grooves connected with the two output ports of the second one-to-two power divider; the signal output by the first port of the fifth coupler is transmitted to the first port of the third waveguide channel through the second sixteen single-ridge waveguide adapter, the sixteenth single-ridge waveguide adapter and the sixth single-ridge waveguide adapter, the signal received by the first port of the third waveguide channel is output at the second port of the third waveguide channel, the signal output by the second port of the third waveguide channel is transmitted to the input port of the second one-third power divider through the fourth double-ridge waveguide adapter and the twelfth double-ridge waveguide adapter, the signal received by the input port of the second one-third power divider is output at the three output ports of the second one-third power divider through power distribution, and the signal output by the three output ports of the second one-third power divider is transmitted to a free space through three radiation slots connected with the third radiation slots; the signal output by the fourth port of the second coupler is transmitted to the first port of the sixth coupler through the eighth single-ridge waveguide adapter, the eighteenth single-ridge waveguide adapter and the twenty-eighth single-ridge waveguide adapter, the signal received by the first port of the sixth coupler is respectively output at the second port, the third port and the fourth port after being subjected to power distribution, the signal output by the second port of the sixth coupler is absorbed through the sixth wave absorbing device, the signal output by the third port of the sixth coupler is transmitted to the second port of the second phase shifter through the twenty-ninth single-ridge waveguide adapter, the nineteenth single-ridge waveguide adapter and the ninth single-ridge waveguide adapter, the second phase shifter converts the phase of the signal received by the second port and outputs the signal at the first port, the signal output by the first port of the second phase shifter is transmitted to the input port of the second divide-by-six power divider through the fifth double-ridge waveguide adapter and the thirteenth double-ridge waveguide adapter, the second divide-by-six power divider distributes the power of the signal received by the input port and outputs the signal at the six output ports, and the signal output by the six output ports of the second divide-by-six power divider is transmitted to a free space through six radiation slots connected with the six radiation slots; the signal obtained from the fourth port of the sixth coupler is transmitted to the first port of the fourth waveguide channel through the thirty-first ridge waveguide adapter, the twenty-first ridge waveguide adapter and the tenth single ridge waveguide adapter, the signal received by the first port of the fourth waveguide channel is transmitted to the second port of the fourth waveguide channel for output, the signal output by the second port of the fourth waveguide channel is transmitted to the input port of the second ninth power divider through the sixth double ridge waveguide adapter and the fourteenth double ridge waveguide adapter, the signal received by the input port of the second ninth power divider is output at nine output ports of the second power divider after power distribution, and the signal output by the nine output ports of the second power divider is transmitted to free space through nine radiation slots connected with the ninth radiation slots.
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