CN114512792A - Miniature broadband conformal antenna - Google Patents
Miniature broadband conformal antenna Download PDFInfo
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- CN114512792A CN114512792A CN202210216612.9A CN202210216612A CN114512792A CN 114512792 A CN114512792 A CN 114512792A CN 202210216612 A CN202210216612 A CN 202210216612A CN 114512792 A CN114512792 A CN 114512792A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 42
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims abstract description 18
- PEZNEXFPRSOYPL-UHFFFAOYSA-N (bis(trifluoroacetoxy)iodo)benzene Chemical compound FC(F)(F)C(=O)OI(OC(=O)C(F)(F)F)C1=CC=CC=C1 PEZNEXFPRSOYPL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000009713 electroplating Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- 238000013461 design Methods 0.000 abstract description 21
- 238000004088 simulation Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005388 cross polarization Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
Abstract
The invention discloses a miniature broadband conformal antenna, which comprises: signal acquisition terminal, WIFI dual-band antenna (3), big dipper dual-band antenna (4) and broadband monitoring antenna (5), wherein, WIFI dual-band antenna (3), big dipper dual-band antenna (4) and broadband monitoring antenna (5) all are fixed to be set up in signal acquisition terminal casing (2) internal surface, WIFI dual-band antenna (3) and big dipper dual-band antenna (4) set up respectively in broadband monitoring antenna (5) both sides, broadband monitoring antenna (5) set up in the middle of signal acquisition terminal casing (2) inside lower surface is positive. The design of the invention takes miniaturization and broadband as an entry point, fully utilizes the form characteristics of the flat bipyramid and the PIFA antenna, combines antenna design simulation, and verifies that the miniature, broadband and conformal design of the broadband monitoring antenna (5), the WIFI dual-frequency antenna (3) and the Beidou dual-frequency antenna (4) is feasible.
Description
Technical Field
The invention relates to the field of antenna design, in particular to a miniature broadband conformal antenna.
Background
Today, radio technology and application are continuously expanded, how to complete fine monitoring through reference information such as target application scenes, categories, systems and the like under the condition of informatization combat becomes a key for controlling regional electromagnetic situation.
In recent years, with rapid update and iteration of wireless communication technology and integrated circuit technology, various military and civil wireless communication devices are also gradually developing in the directions of high sensitivity, high integration, wide band, miniaturization, and the like. Under the background, higher requirements are also put on the antenna performance, and indexes such as multi-band, miniaturization and easy integration with a system become important considerations in antenna design. In addition, the antenna is required to have a conformal structure on high-speed aircrafts such as airplanes and missiles and wearable equipment. These more stringent technical requirements have prompted us to gradually eliminate the conventional antenna form before and to design a new antenna structure.
In chinese patent application No. CN201911048964.2, a multi-frequency conformal antenna with a headspace zero and a working method thereof are provided, which sequentially includes, from top to bottom: the feeder line comprises a dielectric resonator, a floor, a dielectric substrate and a feeder line at the bottom of the dielectric substrate; the floor and the dielectric resonator are both arc-shaped and conformal, the circle center of the arc is positioned below the arc, the dielectric resonator is fixed in the middle of the floor, and the floor is made of metal; the upper surface and the lower surface of the dielectric substrate are respectively attached to the covering floor and the feeder line; etching a feed gap in the center of the floor; according to the invention, through analyzing the distribution and the structure of the internal field of the antenna, an antenna radiation model is constructed by magnetic dipoles, double-frequency point work is realized through two high-order resonance modes, and through adopting a convex floor and a convex dielectric resonator, the oblique omnidirectional and lateral zero point performances are realized by using the two even high-order modes of the dielectric resonator antenna.
At present, the ultra-wideband technology is widely applied to the emerging civil communication field. The ultra-wideband antenna has the bandwidth characteristics incomparable with other antennas, and the bandwidth of GHz level can bring a brand-new voice and data communication mode; and the dual-polarization structure can realize the coverage of a full airspace. The existing ultra-wideband dual-polarized antenna is mostly in the forms of a microstrip, a horn, a vibrator and the like. Microstrip antennas have been developed because of their light weight and easy processing, but realizing dual polarization on a planar structure brings about the disadvantages of narrow bandwidth, poor cross polarization, etc. The dual-polarized horn antenna and the element antenna can ensure the antenna performance, but the inherent shape causes the antenna to be difficult to realize the conformality.
The existing monitoring equipment is provided with antennas which are designed in a sectional mode, and the antennas are compounded to form full-section coverage; meanwhile, the antenna gain and the directional effect are considered, and the antennas are independently erected in multiple configurations and comprise discone antennas, bicone antennas, whip antennas, dipole/monopole antennas, horn antennas and the like. The antenna has the characteristics of large number of antennas and large volume of the antennas, and is difficult to meet the carrying and use requirements of miniaturized equipment.
Disclosure of Invention
The invention provides a miniature broadband conformal antenna which is used for solving the technical problems that in the prior art, the number of antennas is large, the size of the antenna is large, and the carrying and use of miniaturized equipment are difficult to meet.
To achieve the above object, the present invention provides a miniature broadband conformal antenna, which includes: the signal acquisition terminal, WIFI dual-frenquency antenna, big dipper dual-frenquency antenna and broadband monitoring antenna, wherein, WIFI dual-frenquency antenna, big dipper dual-frenquency antenna and broadband monitoring antenna all fix and set up in signal acquisition terminal casing internal surface, WIFI dual-frenquency antenna and big dipper dual-frenquency antenna set up respectively in broadband monitoring antenna both sides, broadband monitoring antenna sets up in the middle of the inside lower surface of signal acquisition terminal casing is positive.
Furthermore, the WIFI dual-frequency antenna, the Beidou dual-frequency antenna and the broadband monitoring antenna are attached to the surface of the signal acquisition terminal shell through a surface plastic electroplating metal process, and relevant loading points are appointed on an electroplating surface to realize resistance loading.
Furthermore, the signal acquisition terminal is internally provided with a stacked structure.
Furthermore, the broadband monitoring antenna is in a flat biconical antenna mode and is designed to be a dipole structure with a width size gradually changing structure.
Furthermore, the WIFI dual-frequency antenna and the Beidou dual-frequency antenna are arranged at the edge of a shell of the signal acquisition terminal and adopt a PIFA or IFA structure.
Furthermore, an IPEX four-generation/five-generation Cable wire is selected as an external radio frequency interface of the WIFI dual-frequency antenna, the Beidou dual-frequency antenna and the broadband monitoring antenna, and a radio frequency module is introduced.
Furthermore, the broadband monitoring antenna meets the requirement of 100 MHz-5 GHz broadband coverage; the Beidou dual-frequency antenna meets the 1.2GHz/1.56GHz broadband coverage; the WIFI dual-frequency antenna meets 2.4GHz/5.8GHz broadband coverage.
Furthermore, the antenna loading adopts a resistance loading mode, and a proper resistance value and a proper loading position are selected according to the antenna arrangement mode.
Furthermore, slots are formed in the surfaces of the WIFI dual-frequency antenna and the Beidou dual-frequency antenna and used for increasing effective paths of currents.
The beneficial effect of this application:
the design of the invention takes miniaturization and broadband as an entry point, makes full use of the characteristics of the flat bipyramid and PIFA antennas, carries out practical research on antenna structure, material, loading point control, meander technology application, layout mode and the like, combines antenna design simulation, and verifies that the miniature, broadband and conformal design of a broadband monitoring antenna, a WIFI dual-frequency antenna and a Beidou dual-frequency antenna is feasible;
the broadband antenna effectively overcomes the defects that the existing broadband antenna is large in size, multiple in segmentation and not beneficial to camouflage, and provides a foundation for building subsequent miniaturized equipment.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and for those skilled in the art, other drawings may be obtained according to the structures of the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural diagram of a signal acquisition terminal housing;
FIG. 3 is a top view of a signal acquisition terminal housing;
in the figure, 1-a monitoring body, 2-a signal acquisition terminal shell, 3-a WIFI dual-frequency antenna, 4-a Beidou dual-frequency antenna and 5-a broadband monitoring antenna.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, a miniature wideband conformal antenna, comprising: signal acquisition terminal, WIFI dual-band antenna 3, big dipper dual-band antenna 4 and broadband monitoring antenna 5, wherein, WIFI dual-band antenna 3, big dipper dual-band antenna 4 and broadband monitoring antenna 5 all fix and set up in 2 internal surfaces of signal acquisition terminal casing, WIFI dual-band antenna 3 and big dipper dual-band antenna 4 set up respectively in 5 both sides of broadband monitoring antenna, broadband monitoring antenna 5 sets up in the positive centre of the inside lower surface of signal acquisition terminal casing 2.
In this embodiment, the WIFI dual-band antenna 3, the big dipper dual-band antenna 4, and the broadband monitoring antenna 5 are attached to the surface of the signal acquisition terminal housing 2 by a surface plastic electroplating metal process, and relevant loading points are designated on an electroplating surface to realize resistance loading.
In this embodiment, the signal acquisition terminal has a stacked structure inside.
In this embodiment, the broadband monitoring antenna 5 is in the form of a flat biconical antenna and is designed as a dipole structure with a gradually changing width dimension.
In this embodiment, the WIFI dual-band antenna 3 and the big dipper dual-band antenna 4 are disposed at the edge of the signal acquisition terminal housing 2, and a PIFA or IFA structure is adopted.
In this embodiment, the external radio frequency interfaces of the WIFI dual-band antenna 3, the big dipper dual-band antenna 4 and the broadband monitoring antenna 5 use an IPEX four-generation/five-generation Cable line, and a radio frequency module is introduced.
In this embodiment, the antenna loading adopts a resistance loading manner, and an appropriate resistance value and a loading position are selected according to the antenna arrangement form.
In this embodiment, the surface of each of the WIFI dual-band antenna 3 and the big dipper dual-band antenna 4 is provided with a slot for increasing the effective path of the current.
Specifically speaking, because the miniature easy-to-use electromagnetic sensing equipment has the structural requirements of miniaturization and concealment, the antenna is arranged on the monitoring machine body 1 during design, so that the purposes of reducing the occupied space of the equipment and ensuring the volume and camouflage advantages of the equipment are achieved.
The method is characterized in that the antenna is designed to cover 100 MHz-5 GHz, and a broadband monitoring antenna 5 is configured to meet the requirement of 100 MHz-5 GHz broadband coverage; a big dipper dual-band antenna 4 (1.2 GHz/1.56 GHz) and a WIFI dual-band antenna 3 (2.4 GHz/5.8 GHz). The antenna is constructed by taking commonalization, miniaturization and broadband as design points, and has the following technical characteristics:
commonization:
in the design process, because the internal module of the signal acquisition terminal adopts a laminated structure, the space for arranging the antenna is extremely small, the antenna can not be processed and designed by using the conventional antenna manufacturing means such as PCB plate making or 3D structural bodies, and the like, according to the antenna design theory, the antenna is designed to be arranged by attaching to the surface of equipment in a surface plastic electroplating mode, and related loading points are appointed on an electroplating surface to realize resistance loading. The overall size of the device is reduced while ensuring antenna performance to achieve a conformal design.
Miniaturization and broadband:
meanwhile, the frequency band of the antenna is wide, and the lower limit of the frequency is low. How to effectively balance size and performance becomes critical. The device adopts antenna loading, meander technology and antenna parting technology to realize antenna miniaturization design.
Antenna loading:
and a resistance loading mode is adopted, and a proper resistance value and a proper loading position are selected according to the antenna arrangement mode, so that the bandwidth and the radiation efficiency of the antenna are improved, and the size of the antenna is reduced.
Bending an antenna:
the design is through slotting in the suitable position on electroplating antenna surface, makes the effective path of electric current increase, and then makes antenna resonant frequency move to the low frequency. The phase change reduces the aperture of the antenna, reduces the Q value of the antenna and increases the bandwidth coverage.
Antenna typing:
the antenna is designed into a wide-size gradient dipole structure in a flat biconical antenna form, so that the frequency band coverage of the antenna is effectively improved, and the actual size of the antenna is reduced.
Overall layout of the antenna:
this design antenna includes broadband monitoring antenna 5, WIFI dual-band antenna 3 and big dipper dual-band antenna 4. The core antenna is a broadband monitoring antenna 5, and the WIFI dual-frequency antenna 3 and the Beidou dual-frequency antenna 4 are auxiliary function antennas.
The broadband monitoring antenna 5 adopts a dipole structure with a gradual change structure. In the design, a large space is required, so the Beidou dual-frequency antenna 4 and the WIFI dual-frequency antenna 3 can only be arranged at the edge of the shell, the position space is small, and a PIFA or IFA structure consistent with a mobile phone antenna is adopted. Antenna profile 2.
The antenna structure design:
in the design, the antenna is mainly attached to the inner surface of a signal acquisition terminal shell 2 (ABS + PC part) structure, and the antenna is attached to the surface of the shell through a plastic electroplating metal process.
In order to reduce the mutual coupling influence between the antennas, when the antennas are laid, the core broadband monitoring antenna 5 is arranged in the center of the shell, the side edge area of the shell is utilized, the laying of the Beidou dual-frequency antenna 4 and the WIFI dual-frequency antenna 3 is completed, the mutual influence of antenna elements is effectively rewarded, the space coverage is improved, and the size of the equipment is reduced in a phase-changing manner.
Designing an antenna interface:
because the antenna has extremely small size, an IPEX four-generation/five-generation Cable line is selected as an external radio frequency interface of the antenna, and a radio frequency module is introduced.
Antenna processing:
the antenna is manufactured by adopting a plastic electro-plating metal process, and metal is deposited on the surface of a manufactured part by utilizing an electrolysis principle to form a uniform, compact and good-bonding-force metal layer. The process is complex, but the metal layer is pure, and the polymer material can be manufactured by mixing a plurality of metal sources.
In the embodiment, the miniature broadband common-mode antenna is designed with miniaturization and broadband as an entry point, the characteristics of the flat bipyramid and PIFA antennas are fully utilized, the antenna structure, the material, the loading point control, the meander technology application, the layout mode and the like are actually researched, and the miniature, broadband and conformal design feasibility of the broadband monitoring antenna 5, the WIFI dual-frequency antenna 3 and the Beidou dual-frequency antenna 4 is verified by combining antenna design simulation. The broadband antenna effectively overcomes the defects that the existing broadband antenna is large in size, multiple in segmentation and not beneficial to camouflage, and provides a foundation for building subsequent miniaturized equipment.
The miniature broadband conformal antenna designed at this time has better frequency band coverage and gain curve, and has the advantages of small volume and good concealment on the premise of reaching the performance index standard. Is not easy to be found under special monitoring and sensitive areas. And can better support the user to carry out the electromagnetic environment monitoring requirement at any time, anywhere and rapidly.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A miniature broadband conformal antenna, comprising: signal acquisition terminal, WIFI dual-band antenna (3), big dipper dual-band antenna (4) and broadband monitoring antenna (5), wherein, WIFI dual-band antenna (3), big dipper dual-band antenna (4) and broadband monitoring antenna (5) all are fixed to be set up in signal acquisition terminal casing (2) internal surface, WIFI dual-band antenna (3) and big dipper dual-band antenna (4) set up respectively in broadband monitoring antenna (5) both sides, broadband monitoring antenna (5) set up in the middle of signal acquisition terminal casing (2) inside lower surface is positive.
2. The miniature broadband conformal antenna according to claim 1, wherein the WIFI dual-band antenna (3), the Beidou dual-band antenna (4) and the broadband monitoring antenna (5) are attached to the surface of the signal acquisition terminal shell (2) through a surface plastic electroplating metal process, and relevant loading points are assigned on an electroplating surface to realize resistance loading.
3. The miniature broadband conformal antenna according to claim 1, wherein the signal acquisition terminal has a stacked structure therein.
4. The miniature broadband conformal antenna according to claim 1, wherein the broadband monitoring antenna (5) is in the form of a flat biconical antenna and is designed as a dipole structure with a wide dimension gradient structure.
5. The miniature broadband conformal antenna according to claim 1, wherein the WIFI dual-band antenna (3) and the Beidou dual-band antenna (4) are arranged at the edge of the signal acquisition terminal shell (2) and adopt a PIFA or IFA structure.
6. The miniature broadband conformal antenna according to claim 1, wherein the external radio frequency interfaces of the WIFI dual-band antenna (3), the Beidou dual-band antenna (4) and the broadband monitoring antenna (5) adopt IPEX fourth generation/fifth generation Cable lines, and a radio frequency module is introduced.
7. The miniature broadband conformal antenna according to claim 1, wherein the broadband monitoring antenna (5) satisfies 100 MHz-5 GHz broadband coverage; the Beidou dual-frequency antenna (4) meets the 1.2GHz/1.56GHz broadband coverage; the WIFI dual-frequency antenna (3) meets 2.4GHz/5.8GHz broadband coverage.
8. The miniature broadband conformal antenna according to claim 1, wherein the antenna loading adopts a resistance loading manner, and a proper resistance value and a loading position are selected according to the antenna layout form.
9. The miniature broadband conformal antenna according to claim 1, wherein slots are formed on the surfaces of the WIFI dual-frequency antenna (3) and the Beidou dual-frequency antenna (4) for increasing the effective path of current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210216612.9A CN114512792A (en) | 2022-03-07 | 2022-03-07 | Miniature broadband conformal antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210216612.9A CN114512792A (en) | 2022-03-07 | 2022-03-07 | Miniature broadband conformal antenna |
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| CN114512792A true CN114512792A (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210216612.9A Pending CN114512792A (en) | 2022-03-07 | 2022-03-07 | Miniature broadband conformal antenna |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040104853A1 (en) * | 2002-12-02 | 2004-06-03 | Po-Chao Chen | Flat and leveled F antenna |
| CN102142606A (en) * | 2010-12-10 | 2011-08-03 | 深圳市信维通信股份有限公司 | Abnormal multi-frequency antenna |
| CN102694253A (en) * | 2012-06-11 | 2012-09-26 | 哈尔滨工业大学 | Balance microstrip line feed ultra-wideband dipole antenna |
| CN102891359A (en) * | 2011-07-22 | 2013-01-23 | 深圳市长盈精密技术股份有限公司 | Manufacturing process of mobile phone built-in printed antenna |
| CN111653866A (en) * | 2020-06-17 | 2020-09-11 | 苏州优函信息科技有限公司 | Design of novel ultra-wideband conformal antenna |
| CN214254698U (en) * | 2020-12-15 | 2021-09-21 | 成都九华圆通科技发展有限公司 | Hand-held type direction finding antenna |
-
2022
- 2022-03-07 CN CN202210216612.9A patent/CN114512792A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040104853A1 (en) * | 2002-12-02 | 2004-06-03 | Po-Chao Chen | Flat and leveled F antenna |
| CN102142606A (en) * | 2010-12-10 | 2011-08-03 | 深圳市信维通信股份有限公司 | Abnormal multi-frequency antenna |
| CN102891359A (en) * | 2011-07-22 | 2013-01-23 | 深圳市长盈精密技术股份有限公司 | Manufacturing process of mobile phone built-in printed antenna |
| CN102694253A (en) * | 2012-06-11 | 2012-09-26 | 哈尔滨工业大学 | Balance microstrip line feed ultra-wideband dipole antenna |
| CN111653866A (en) * | 2020-06-17 | 2020-09-11 | 苏州优函信息科技有限公司 | Design of novel ultra-wideband conformal antenna |
| CN214254698U (en) * | 2020-12-15 | 2021-09-21 | 成都九华圆通科技发展有限公司 | Hand-held type direction finding antenna |
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| Title |
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| 姚凤薇: "小曲率锥台共形微带圆极化天线阵列设计", 《上海电机学院学报》 * |
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Application publication date: 20220517 |
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