CN110085982B - Ultra-wideband dual-polarized antenna and manufacturing method thereof - Google Patents
Ultra-wideband dual-polarized antenna and manufacturing method thereof Download PDFInfo
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- CN110085982B CN110085982B CN201910403550.0A CN201910403550A CN110085982B CN 110085982 B CN110085982 B CN 110085982B CN 201910403550 A CN201910403550 A CN 201910403550A CN 110085982 B CN110085982 B CN 110085982B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
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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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Abstract
The invention discloses an ultra-wideband dual-polarized antenna, which comprises a metal base and a four-arm Sinuous spiral antenna, wherein the metal base is provided with a plurality of antenna elements; the metal base is conical, hollow in the metal base and open at two ends; the four-arm Sinuous spiral antenna is conical and is matched with the conical curved surface of the inner surface of the metal base; the four-arm Sinuous spiral antenna is attached to the inner surface of the metal base. The invention also provides a manufacturing method of the ultra-wideband dual-polarized antenna. By the embodiment, not only the radiation aperture can be fully utilized and the size of the antenna can be reduced, but also the low-elevation radiation of the antenna can be increased, namely the 3dB lobe width is improved.
Description
Technical Field
The invention relates to the technical field of communication antennas, in particular to an ultra-wideband dual-polarized antenna and a manufacturing method thereof.
Background
In microwave communication and radar detection systems, antennas take on the task of transmitting and receiving electromagnetic waves. During signal transmission, the antenna converts guided waves into space electromagnetic waves and points to a specific direction; when receiving signals, the antenna converts the space electromagnetic waves into high-frequency electromagnetic waves and transmits the high-frequency electromagnetic waves to the radio-frequency receiver. In recent years, with the continuous development of communication systems and the improvement of the technology process of microelectronic devices, ultra-wideband communication technologies and device process manufacturing methods emerge, and compared with the traditional communication technologies, the ultra-wideband antenna technology has bandwidth of GHz magnitude, and as a brand new antenna form, the ultra-wideband antenna technology has the following advantages: 1) Because the ultra-wideband antenna technology adopts time-hopping spread spectrum signals, the infinite electric pulse signals are scattered and spread in a wider frequency band during transmitting, and compared with noise generated by common equipment, the ultra-wideband antenna technology has lower output power, and can generate spread spectrum gain through despreading in the energy recovery process during receiving, thereby bringing larger processing gain to the system; 2) Under the condition of the same code rate, the ultra-wideband antenna technology is adopted to bring stronger anti-interference performance to the system; 3) The ultra-wideband communication has a higher transmission rate due to the wide frequency band occupation, and can reach hundreds to thousands of Mbps; 4) The ultra-wideband communication does not consume carrier waves with larger power, and only transmits instantaneous pulse electric waves when needed, so that the consumed electric energy is smaller than that of the traditional communication mode, the working time of a system power supply is prolonged, and the influence on a human body is reduced; 5) Ultra wideband communication has better confidentiality.
The ultra-wideband antenna is widely applied to the fields of electromagnetic measurement, electromagnetic compatibility test, ultra-wideband radar and the like. The main realization forms are as follows: 1) The ridge horn has the advantages of wide frequency band, good directivity, high gain, high power load capacity and the like; 2) The Vivaldi antenna has the advantage of low profile; 3) The self-compensating antenna has the characteristic of non-frequency variation due to self-compensation of a radiation structure. The dual polarized antenna can realize the receiving and transmitting duplex mode in the communication field, thereby reducing the number of the working antennas of the directional base station, reducing the switching times of the antennas with different polarization directions in certain test fields, realizing polarization diversity and frequency multiplexing in mobile communication application, realizing the polarization isolation of receiving and transmitting in satellite communication, and providing two mutually orthogonal polarized waves in a broadband direction finding system. It can be seen that ultra wideband dual polarized antennas have great development potential in many fields.
Document 1 (Chen Zhenhua. Research and design of ultra wideband planar sinusoidal antenna. National institute of aviation, university of aerospace, university of south Beijing, shuoshi, 2009.) has developed a 3-15 GHz conventional two-arm planar sinusoidal antenna, and the feed is realized by adopting a miniature index gradient microstrip feed balun, so that the antenna has the advantages of ultra wideband, full polarization capability and single aperture. Document 2 (Wang Han, hu Xing. Design and simulation of a double circular polarization planar sineous line. Space electronics technology, 2017 (5): 76-78.) designed a planar sineous antenna, which is mainly composed of multiple sections of archimedes curves, has four feed ports, can realize good double circular polarization characteristics by matching with a feed network, has an axial ratio of below 3dB in a design frequency band, and has a pattern out-of-roundness of less than 0.5dB. The antenna has a planar structure and can realize double circular polarization, and the size area is reduced by a meandering manner. Document 3 (Shao Yunqing. Ultra wideband antenna miniaturization study. University of south China's university of major school paper, 2015.) describes a design method of a miniaturized Sinuous antenna of a wideband antenna, which adopts the modes of medium loading, reactance loading, current path increasing and the like to reduce the radiation area of the antenna and the size of the Sinuous antenna. The diameter of the Sinuous antenna coupled by the loading ring is 44mm, and the reduction coefficient of the antenna reaches 1.36 by the ring coupling, and the bandwidth coverage of 10dB return loss is 2.45-18.7 GHz. Document 4 (Li Mingding. Research on a wide-beam circularly polarized antenna. Institute of electronic technology university of western security, institute of major, 2008.) has studied a design method of a wide-beam circularly polarized antenna, and proposed a design scheme of a multi-frequency antenna, which introduces measures such as a double-floor, a high-dielectric constant substrate, a dielectric extension structure, and the like in a 2-18 GHz-based antenna, so as to optimize radiation characteristics of the antenna.
The ultra-wideband circularly polarized antenna has the following disadvantages:
if the microstrip antenna realizes broadband characteristics, a plurality of layers of media or air layers are required to be introduced, so that the volume of the antenna is increased and the structure is not compact;
the bandwidth of the antenna is widened or more than two working frequency bands are covered, and the measures such as capacitance, short circuit pins and the like are needed to be adopted to introduce multimode working modes, so that the design and processing difficulty of the antenna are increased;
the gain of the planar microstrip antenna in the low elevation direction drops rapidly, and the 3dB lobe width is insufficient.
Disclosure of Invention
The invention provides an ultra-wideband dual-polarized antenna and a manufacturing method thereof for solving the technical problems, which not only can fully utilize the radiation aperture and reduce the size of the antenna, but also can increase the low elevation radiation of the antenna, namely, the 3dB lobe width is increased.
In order to solve the above technical problems, the present invention provides an ultra-wideband dual polarized antenna, comprising: a metal base and a four-arm Sinuous helical antenna; the metal base is conical, hollow in the metal base and open at two ends; the four-arm Sinuous spiral antenna is bent into a structure with the bottom surface matched with the conical curved surface of the inner surface of the metal base; the four-arm Sinuous spiral antenna is attached to the inner surface of the metal base.
Further, the four-arm Sinuous spiral antenna comprises four identical Sinuous antenna units, the bottom surface of each Sinuous antenna unit is matched with the conical curved surface of the inner surface of the metal base, and along the circumferential direction of the metal base, each Sinuous antenna unit faces to be consistent and is attached to the inner surface of the metal base at equal angles.
Further, the Sinuous antenna unit includes a plurality of sections of sinusoidal radiating arms, each radiating arm is connected into a whole in a round trip and turn back and forth staggered manner at a certain angle and forms a non-closed structure, an opening at one end of the metal base is a first opening, an opening at the other end of the metal base is a second opening, the radius of the second opening is larger than that of the first opening, the length of the radiating arm in the Sinuous antenna unit gradually increases from the first opening to the direction of the second opening.
Further, in the Sinuous antenna unit, the sinusoidal curve of each radiating arm is formed according to the following formula:
wherein,R n is the firstnThe radius of the segment curve is set to be,r n =R n+1 /R n ，α n is the firstnThe angular span of the segment curves, phi and r, are polar coordinate system coordinates.
Further, in the Sinuous antenna unit, the angular span between each two adjacent radiating arms is set to 22.5 °, so that the Sinuous antenna unit is formed into a self-compensating pattern.
Further, each adjacent Sinuous antenna unit is spliced and nested by utilizing the characteristic of the self-compensating pattern.
Further, the four-arm Sinuous spiral antenna comprises a first feeding point, a second feeding point, a third feeding point and a fourth feeding point which are sequentially arranged along the circumferential direction, and the ultra-wideband dual-polarized antenna further comprises a feeding network; the feed network comprises two 90 ° bridges defined as a first bridge and a second bridge, and a first balun and a second balun; the first feeding point and the second feeding point are respectively and electrically connected with the first input end and the second input end of the first bridge, and the third feeding point and the fourth feeding point are respectively and electrically connected with the first input end and the second input end of the second bridge; the first output end and the second output end of the first bridge are respectively and electrically connected with the first input end of the first balun and the first input end of the second balun, and the first output end and the second output end of the second bridge are respectively and electrically connected with the second input end of the first balun and the second input end of the second balun; and the first output end of the first balun is electrically connected with the first feed output end, the second output end of the second balun is grounded, and the first output end of the second balun is electrically connected with the second feed output end.
In order to solve the technical problems, the invention also provides a manufacturing method of the ultra-wideband dual-polarized antenna, which comprises the following steps: preparing a metal base having a hollow interior and having openings at both ends; manufacturing a four-arm Sinuous spiral antenna, wherein the four-arm Sinuous spiral antenna is conical and is matched with a conical curved surface of the inner surface of the metal base; and mounting the four-arm Sinuous spiral antenna on the inner surface of the metal base.
Further, in the step of manufacturing the four-arm Sinuous helical antenna, the method specifically comprises the following steps: and manufacturing an antenna layout of the four-arm Sinuous spiral antenna on the microwave board through a planar circuit board process, cutting the antenna layout, and bending the antenna layout into a cone shape matched with the cone curved surface of the metal base.
Further, in the step of mounting the four-arm Sinuous helical antenna on the inner surface of the metal base, specifically: and arranging the four-arm Sinuous spiral antenna on the inner surface of the metal base through an adhesive process.
The ultra-wideband dual-polarized antenna and the manufacturing method thereof have the following beneficial effects:
by adopting a conical metal base and arranging a conical four-arm Sinuous spiral antenna on the inner surface of the metal base, a Sinuous antenna unit is realized by adopting a multi-section sinusoidal curve, and the radiation aperture can be fully utilized, the size of the antenna can be reduced, the low-elevation radiation of the antenna can be increased, namely the 3dB lobe width can be improved;
and by designing a feed network comprising two 90-degree bridges and two balun, and outputting through a double port, the left-hand circular polarization and the right-hand circular polarization can be realized at the same time, namely, the double circular polarization of the dual-polarized antenna is realized.
Drawings
Fig. 1 is a top view of an assembled structure of the ultra wideband dual polarized antenna of the present invention.
Fig. 2 is a side perspective view of the ultra wideband dual polarized antenna shown in fig. 1.
Fig. 3 is a perspective view of a four-arm Sinuous helical antenna in the ultra wideband dual polarized antenna shown in fig. 2.
Fig. 4 is a top plan view of the four-arm Sinuous helical antenna shown in fig. 2.
Fig. 5 is a schematic plan view of four unit antennas in the four-arm Sinuous helical antenna shown in fig. 3.
Fig. 6 is an antenna layout for making the four-armed Sinuous helical antenna shown in fig. 3.
Fig. 7 is a top view of a metal chassis in the ultra wideband dual polarized antenna shown in fig. 1.
Fig. 8 is a side view of a metal chassis in the ultra wideband dual polarized antenna shown in fig. 1.
Fig. 9 is a circuit diagram of a feed network in the ultra wideband dual polarized antenna shown in fig. 1.
Fig. 10 is a reflection loss diagram of the ultra wideband dual polarized antenna of fig. 1.
Fig. 11 is a gain diagram of the ultra wideband dual polarized antenna of fig. 1 at a frequency of 1.5 GHz.
Fig. 12 is a schematic diagram of an axial ratio of the ultra wideband dual polarized antenna of fig. 1 at a frequency of 1.5 GHz.
Fig. 13 is a flowchart of a method of manufacturing an ultra wideband dual polarized antenna of the present invention.
Detailed Description
The present invention will be described in detail with reference to the drawings and embodiments.
The invention provides an ultra-wideband dual-polarized antenna. Referring to fig. 1 to 8, the ultra wideband dual polarized antenna includes a metal base 20 and a four-arm Sinuous helical antenna 10.
The metal base 20 has a conical structure with a hollow interior and openings at both ends, corresponding to a truncated conical structure. The four-arm Sinuous helical antenna 10 has a conical shape adapted to the conical curved surface of the inner surface of the metal base 20, and the four-arm Sinuous helical antenna 10 is attached to the inner surface of the metal base 20, which corresponds to attaching the four-arm Sinuous helical antenna 10 to the inner surface of the metal base 20 in a vertical projection manner for easy understanding.
Specifically, the four-arm Sinuous helical antenna 10 includes four identical Sinuous antenna elements 11, 12, 13, 14, i.e., the four Sinuous antenna elements 11-14 have identical structures and dimensions. Wherein, each of the Sinuous antenna units 11-14 adopts a conical curved surface distribution, which is matched with the conical curved surface of the inner surface of the metal base 20. Along the circumferential direction of the metal base 20, the Sinuous antenna elements 11 to 14 are uniformly oriented and equiangularly attached to the inner surface of the metal base 20. One can consider that a single Sinuous antenna element 11 is duplicated in four copies rotated by 90 ° to form further Sinuous antenna elements 12, 13, 14, which in turn form the four-arm Sinuous helical antenna 10.
By adopting the conical metal base 20 and arranging the conical four-arm Sinuous spiral antenna 10 on the inner surface of the metal base 20, not only the radiation aperture can be fully utilized and the size of the antenna can be reduced, but also the low elevation radiation of the antenna can be increased, namely the 3dB lobe width can be improved.
In one embodiment, one of the Sinuous antenna elements, such as the Sinuous antenna element 11, is specifically described. The Sinuous antenna element 11 includes a plurality of radiating arms 110 that are sinusoidal. Wherein, each radiating arm 110 is connected into a whole in a round trip, folding and staggered manner at a certain angle and forms a non-closed structure, that is, two ends of the other radiating arms 110 are connected with other radiating arms 110 except that one end of each of the first section of radiating arm 110 and the last section of radiating arm 110 is not connected with other radiating arms 110. For example, the Sinuous antenna element 11 may be designed as 12 radiating arms 110, the 12 radiating arms 110 having a gradually changing length, the shortest radiating arm 110 having the highest operating frequency and the longest radiating arm 110 having the lowest operating frequency. Wherein the low frequency operating frequency of the antenna can be extended by increasing the length of the radiating arm 110. Typically, the shortest radiating arm 110 may be located adjacent to the edge of the smaller radius opening in the metal base 20, and the longest radiating arm 110 may be located adjacent to the edge of the larger radius opening in the metal base 20, to further reduce the volume of the antenna.
Further, as shown in fig. 7, the opening at one end of the metal base 20 is defined as a first opening 21, and the opening at the other end is defined as a second opening 22, and the radius of the second opening 22 is larger than that of the first opening 21. The length of the radiating arm 110 in the Sinuous antenna element 11 gradually increases from the first opening 21 toward the second opening 22. More specifically, in the same Sinuous antenna element 11, the sinusoidal curve of each radiating arm 110 is formed according to the following formula:
wherein,R n is the firstnThe radius of the segment curve is set to be,r n =R n+1 /R n ，α n is the firstnThe angular span of the segment curves, phi and r, are polar coordinate system coordinates.
In a preferred embodiment, to form the Sinuous antenna element 11 as a self-compensating pattern, the angular span between each adjacent two radiating arms 110 is set to 22.5 °. The sinu antenna element 11 has a self-compensating pattern, that is, in each set of radiating arms 110, the joint portions of two adjacent radiating arms 110 can be at least partially inserted and nested in the gap portions (not shown) formed by the two radiating arms 110, and it can be understood that when two or more identical sinu antenna elements, such as 11 to 14, are provided, when the respective sinu antenna elements 11 to 14 are oriented in the same arrangement in the circumferential direction, the adjacent two sinu antenna elements can be inserted and nested with each other. The four-arm Sinuous helical antenna 10 has a wide bandwidth because the space between each radiating arm 110 and its corresponding two radiating arms 110 in the Sinuous antenna elements 11-14 is self-compensating in shape, and is essentially a non-frequency-variable antenna.
In another preferred embodiment, each of the adjacent Sinuous antenna elements 11 to 14 are nested with each other by utilizing the characteristic of the self-compensating pattern, in particular, 11 to 14, which are disposed toward the same direction in the circumferential direction. Preferably, in order to improve isolation between the respective sinuity antenna elements 11 to 14, the radiating arms 110 between the different sinuity antenna elements 11 to 14 need to be nested without touching each other. Therefore, through non-contact splicing nesting, the electrical characteristics of the dual-polarized antenna can be ensured, the volume of the dual-polarized antenna can be greatly reduced, and the realization of the ultra-small antenna is facilitated.
According to the basic structural design of the ultra-wideband dual-polarized antenna, a feed network can be designed to realize linear dual polarization (i.e., horizontal polarization and vertical polarization) of the dual-polarized antenna.
The invention is further designed with another feed network to realize double circular polarization (i.e. left-hand circular polarization and right-hand circular polarization) of the dual-polarized antenna. Specifically, referring to fig. 5 and 9, each of the four Sinuous antenna elements 11 to 14 of the four-arm Sinuous helical antenna 10 is provided with a feeding point at the start end of the radiation arm 110 having the shortest length, and the four feeding points A1 to A4 are sequentially arranged along the circumferential direction, and accordingly, the feeding network includes two 90 ° bridges, which are defined as a first bridge 31 and a second bridge 32, respectively; and two balun, defined as a first balun 33 and a second balun 34, respectively.
The feeding point A1 is electrically connected to the first input terminal of the first bridge 31, the feeding point A2 is electrically connected to the second input terminal of the first bridge 31, the feeding point A3 is electrically connected to the first input terminal of the second bridge 32, and the feeding point A4 is electrically connected to the second input terminal of the second bridge 32.
Further, a first output terminal of the first bridge 31 is electrically connected to a first input terminal of the first balun 33, and a second output terminal of the first bridge 31 is electrically connected to a first input terminal of the second balun 34; the first output of the second bridge 32 is electrically connected to the second input of the first balun 33 and the second output of the second bridge 32 is electrically connected to the second input of the second balun 34.
Further, the first output end of the first balun 33 is electrically connected to the first feeding output end P1, and the second output end of the first balun 33 is grounded; the first output terminal of the second balun 34 is grounded, and the second output terminal of the second balun 34 is electrically connected to the second feeding output terminal P2.
By the above-described feeding network, when the feeding phases of the four unit antenna elements 11 to 14 (clockwise in fig. 4, the unit antenna elements 11, 12, 13, 14) of the four-arm unit helical antenna 10 are respectively 0 °, 90 °, 180 °, 270 °, a left-hand circularly polarized wave can be generated; whereas (clockwise in fig. 4 with respect to the Sinuous antenna elements 11, 12, 13, 14) the right-hand circularly polarized wave can be generated when the feed phases are 0 °, -90 °, -180 °, -270 °, respectively. I.e. with two 90 bridges 31, 32 and two balun 33, 34, a double circular polarization can be achieved.
The four feed-point leads are electrically connected to the inside of the conical metal base 20, connecting the feed network described above, ultimately forming two feed-out terminals P1, P2 (i.e., a left-hand circularly polarized port and a right-hand circularly polarized port).
In the above embodiment, the four-arm Sinuous helical antenna 10 is made of a microwave board 17, for example, a TLY-5 microwave board with a thickness of 0.762 mm.
The port parameter test result of the dual-polarized antenna is shown in fig. 6, the radiation characteristic of the antenna at the lower frequency limit of 1.5GHz is shown in fig. 10-12, specifically, as shown in fig. 10, the echo reflection of the antenna in the working frequency band is less than-10 dB; as shown in fig. 11, the antenna has a gain greater than-6 dB at the low end of the frequency, and a half-wave beam width of up to 140 degrees; as shown in fig. 12, the antenna has an axial ratio of less than 3dB over the half-wave beam width. The overall size of the antenna is 30mm in diameter of a conical base, 13mm in diameter of an inner hole of the conical body and 12mm in height; the overall size is about 1/7 of the wavelength corresponding to the lowest operating frequency (i.e., 1.5 GHz), which is a very small antenna.
According to the design principle and the structure of the ultra-wideband dual-polarized antenna, the ultra-wideband dual-circularly polarized antenna with the frequency band covering 1.5GHz-8GHz can be realized, and the ultra-wideband dual-polarized antenna can be widely applied to the fields of ultra-wideband communication, radar detection, radio direction finding and the like.
The invention provides a manufacturing method of an ultra-wideband dual-polarized antenna. As shown in fig. 13, the manufacturing method includes the steps of:
step S1, preparing a metal base.
The metal base is provided with a hollow interior and two ends of the metal base are provided with openings.
Step S2, manufacturing a four-arm Sinuous spiral antenna.
The four-arm Sinuous spiral antenna is conical and matched with the conical curved surface of the inner surface of the metal base.
And S3, mounting the four-arm Sinuous spiral antenna on the inner surface of the metal base.
The four-arm Sinuous spiral antenna can be attached to the inner surface of the metal base through an adhesive process.
In a specific embodiment, in step S2, that is, in the step of manufacturing the four-arm Sinuous helical antenna, the antenna layout of the four-arm Sinuous helical antenna may be manufactured by using a planar circuit board process (including printing the trace 16 on the microwave board 17, etching the trace 16, etc.), and the antenna layout may be cut and then bent into a conical shape matching the conical curved surface of the metal base.
The ultra-wideband dual-polarized antenna and the manufacturing method thereof have the following beneficial effects:
by adopting the conical metal base 20 and arranging the conical four-arm Sinuous spiral antenna 10 on the inner surface of the metal base 20, the Sinuous antenna units 11-14 are realized by adopting a multi-section sinusoidal curve, and the radiation aperture can be fully utilized, the size of the antenna can be reduced, the low-elevation radiation of the antenna can be increased, namely the 3dB lobe width can be increased;
and by designing a feed network comprising two 90-degree bridges 31, 32 and two balun 33, 34 and outputting through dual ports P1, P2, both left-hand circular polarization and right-hand circular polarization can be realized, i.e. dual circular polarization of the dual-polarized antenna is realized.
The foregoing is only the embodiments of the present invention, and therefore, the patent scope of the invention is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the invention.
Claims (8)
1. An ultra-wideband dual polarized antenna is characterized in that,
comprising the following steps:
a metal base and a four-arm Sinuous helical antenna;
the metal base is conical, hollow in the metal base and open at two ends;
the four-arm Sinuous spiral antenna is conical and is matched with the conical curved surface of the inner surface of the metal base; the four-arm Sinuous spiral antenna is attached to the inner surface of the metal base;
the four-arm Sinuous spiral antenna comprises four identical Sinuous antenna units, the Sinuous antenna units are formed into self-compensating patterns, and adjacent Sinuous antenna units are inserted and nested in a non-contact mode by utilizing the characteristic of the self-compensating patterns.
2. The ultra-wideband dual polarized antenna of claim 1, wherein:
the bottom surface of each Sinuous antenna unit is matched with the conical curved surface of the inner surface of the metal base, and along the circumferential direction of the metal base, each Sinuous antenna unit is attached to the inner surface of the metal base in a consistent and equal-angle direction.
3. The ultra wideband dual polarized antenna of claim 2, wherein:
the Sinuous antenna unit comprises a plurality of sections of sine-curve radiating arms, the radiating arms are connected into a whole in a round trip and folding and staggered mode at a certain angle to form a non-closed structure, an opening at one end of the metal base is a first opening, an opening at the other end of the metal base is a second opening, the radius of the second opening is larger than that of the first opening, the length of the radiating arm in the Sinuous antenna unit gradually increases from the first opening to the second opening.
4. An ultra wideband dual polarized antenna according to claim 3, characterized in that:
in the Sinuous antenna unit, the sine curve of each radiating arm is formed according to the following formula:
wherein R is n Radius of the nth curve, r n ＝R n+1 /R n ，α n Is the angular span of the nth segment of curve,and r is a polar coordinate system coordinate.
5. An ultra wideband dual polarized antenna according to claim 3, characterized in that:
the four-arm Sinuous spiral antenna comprises a first feeding point, a second feeding point, a third feeding point and a fourth feeding point which are sequentially arranged along the circumferential direction, and the ultra-wideband dual-polarized antenna further comprises a feeding network;
the feed network comprises two 90 ° bridges defined as a first bridge and a second bridge, and a first balun and a second balun;
the first feeding point and the second feeding point are respectively and electrically connected with the first input end and the second input end of the first bridge, and the third feeding point and the fourth feeding point are respectively and electrically connected with the first input end and the second input end of the second bridge; the first output end and the second output end of the first bridge are respectively and electrically connected with the first input end of the first balun and the first input end of the second balun, and the first output end and the second output end of the second bridge are respectively and electrically connected with the second input end of the first balun and the second input end of the second balun; and the first output end of the first balun is electrically connected with the first feed output end, the second output end of the second balun is grounded, and the first output end of the second balun is electrically connected with the second feed output end.
6. A method for manufacturing ultra-wideband dual-polarized antenna is characterized in that,
the method comprises the following steps:
preparing a metal base having a hollow interior and having openings at both ends;
manufacturing a four-arm Sinuous spiral antenna, wherein the four-arm Sinuous spiral antenna is conical and is matched with a conical curved surface of the inner surface of the metal base; mounting the four-arm Sinuous spiral antenna on the inner surface of the metal base;
the four-arm Sinuous spiral antenna is formed to comprise four identical Sinuous antenna units, the Sinuous antenna units are formed into self-compensating patterns, and adjacent Sinuous antenna units are nested in a mutually non-contact way by utilizing the characteristic of the self-compensating patterns.
7. The method of manufacturing an ultra-wideband dual polarized antenna of claim 6, wherein,
in the step of manufacturing the four-arm Sinuous helical antenna, the method specifically comprises the following steps:
and manufacturing an antenna layout of the four-arm Sinuous spiral antenna on the microwave board through a planar circuit board process, cutting the antenna layout, and bending the antenna layout into a cone shape matched with the cone curved surface of the metal base.
8. The method of manufacturing an ultra-wideband dual polarized antenna of claim 6, wherein,
in the step of mounting the four-arm Sinuous helical antenna on the inner surface of the metal base, the method specifically comprises the following steps:
and arranging the four-arm Sinuous spiral antenna on the inner surface of the metal base through an adhesive process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403550.0A CN110085982B (en) | 2019-05-15 | 2019-05-15 | Ultra-wideband dual-polarized antenna and manufacturing method thereof |
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