CN115332808A - Microstrip patch antenna - Google Patents
Microstrip patch antenna Download PDFInfo
- Publication number
- CN115332808A CN115332808A CN202211118133.XA CN202211118133A CN115332808A CN 115332808 A CN115332808 A CN 115332808A CN 202211118133 A CN202211118133 A CN 202211118133A CN 115332808 A CN115332808 A CN 115332808A
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- shaped
- patch antenna
- microstrip
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- 239000000758 substrate Substances 0.000 claims abstract description 26
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 claims description 16
- 239000000523 sample Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000005672 electromagnetic field Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 16
- 238000010586 diagram Methods 0.000 abstract description 10
- 238000004891 communication Methods 0.000 abstract description 2
- 230000000737 periodic effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
Abstract
The invention relates to the technical field of electronics and communication. A microstrip patch antenna comprising: the comb-shaped patch, the dielectric substrate, the grounding plate and the coaxial line are arranged on the substrate; the comb-shaped patches are stacked on the medium substrate; the dielectric substrate is stacked on the grounding plate; the ground plate is connected with the comb-shaped patch through the coaxial line; the comb-shaped patch comprises a plurality of butterfly-shaped unit structures which are periodically distributed; the butterfly-shaped unit structure is formed by cutting off an isosceles triangle from each of two short sides of a rectangular patch, and the middle point of the bottom side of the isosceles triangle is superposed with the middle point of the short side of the rectangular patch. According to the invention, the period of the butterfly-shaped unit structures is changed by arranging the butterfly-shaped unit structures in periodic distribution so as to realize regulation and control of the resonant frequency of the antenna, so that the resonant frequency of the antenna is effectively reduced, good radiation characteristics are kept, the radiation efficiency of the antenna is high, the directional diagram is regular, and the electric size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.
Description
Technical Field
The invention relates to the technical field of electronics and communication, in particular to a microstrip patch antenna.
Background
Microstrip antennas are widely used in the fields of mobile communications, space technology, and modern medical treatment, which require antennas with miniaturized size, for example, in the field of mobile communications, miniaturized portable devices will make the application more convenient; in the field of space technology, the satellite transmission cost is proportional to the mass of the load, so that the size of the antenna is reduced, the weight of the antenna is reduced, and the transmission cost can be reduced undoubtedly.
Although microstrip antennas have many advantages in terms of structure, physical performance and the like, such as low profile, light weight and the like, the size of the conventional patch antenna is generally half-wavelength, and the size of the conventional patch antenna limits the application of the microstrip antenna in miniaturized devices, and has certain limitations.
The common method for reducing the size of the microstrip antenna today is to load a metal short-circuit pillar or a short-circuit wall, but this method will significantly reduce the antenna efficiency, and the pattern may be distorted, and there is also a certain limitation.
How to break through the size of the traditional microstrip patch antenna and further reduce the patch size on the premise of keeping higher radiation efficiency is an important problem to be solved urgently in the field.
Disclosure of Invention
Aiming at the defects of the prior art that the size of the traditional microstrip antenna patch is generally half-wavelength magnitude, and other methods for optimizing the size can reduce the antenna efficiency, the invention provides the microstrip patch antenna, which realizes the purpose of further reducing the electric size of the microstrip patch antenna while keeping higher radiation efficiency.
In order to achieve the purpose, the invention provides the following scheme:
a microstrip patch antenna, comprising: the comb-shaped patch, the dielectric substrate, the grounding plate and the coaxial line are arranged on the substrate;
the comb-shaped patches are stacked on the medium substrate; the dielectric substrate is stacked on the grounding plate; the ground plate is connected with the comb-shaped patch through the coaxial line;
the comb-shaped patch comprises a plurality of butterfly-shaped unit structures which are periodically distributed; the butterfly-shaped unit structure is formed by cutting off an isosceles triangle from each of two short sides of a rectangular patch, and the middle point of the bottom side of the isosceles triangle is superposed with the middle point of the short side of the rectangular patch;
the coaxial line, the grounding plate and the comb-shaped patch form a signal transmission loop; the coaxial line feeds power to the comb-shaped patch, and a radio-frequency electromagnetic field is generated between the comb-shaped patch and the grounding plate.
Optionally, a circular groove is formed in the center of the grounding plate.
Optionally, the coaxial line specifically includes: an outer conductor and an inner conductor probe;
the outer conductor is connected with the grounding plate;
the inner conductor probe penetrates through the medium substrate through the circular groove to be connected with the comb-shaped patch, is not in contact with the circular groove, and is used for feeding power to the comb-shaped patch.
Optionally, the butterfly unit structure is a centrosymmetric structure.
Optionally, the height of the isosceles triangle is W 1 The long side of the rectangular patch is W, W 1 ＜W/2。
Optionally, the ground plate and the comb patch are made of any one of silver, copper and aluminum.
Optionally, the ground plate and the comb patch are made of an alloy of any of silver, copper and aluminum.
Optionally, the relative dielectric constant ε of the dielectric substrate r The value of tan delta was set to 2.2, the value of tan delta was set to 0.0009, and the thickness h was set to 4mm.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the comb-shaped patch in the microstrip patch antenna is optimally designed, specifically, a plurality of butterfly-shaped unit structures which are periodically distributed are arranged, the electrical size of the microstrip patch antenna is structurally reduced, and compared with a rectangular patch of a traditional antenna, the electrical length of the microstrip patch antenna is reduced by about 24%; by arranging a plurality of butterfly unit structures which are periodically distributed, the period of the butterfly unit structures is changed to realize the regulation and control of the resonant frequency of the antenna, so that the resonant frequency of the antenna is effectively reduced, the good radiation characteristic is kept, the radiation efficiency of the antenna is high, the directional diagram is regular, and the electric size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a structural diagram of a microstrip patch antenna provided in an embodiment of the present invention, where the left side is a top view and the right side is a side view;
fig. 2 is a structural diagram of a butterfly unit of the microstrip patch antenna according to the embodiment of the present invention;
fig. 3 is a comb-shaped patch structure diagram of a microstrip patch antenna according to an embodiment of the present invention;
fig. 4 is a graph comparing reflection coefficient curves of the microstrip patch antenna according to the embodiment of the present invention and a conventional microstrip patch antenna;
fig. 5 is a gain curve diagram of a microstrip patch antenna according to an embodiment of the present invention;
fig. 6 is a graph illustrating the efficiency of a microstrip patch antenna according to an embodiment of the present invention;
fig. 7 is an E-plane radiation pattern of a microstrip patch antenna provided in an embodiment of the present invention;
fig. 8 is an H-plane radiation pattern of the microstrip patch antenna according to the embodiment of the present invention.
Description of the symbols:
the structure comprises a butterfly-shaped unit structure-1, a comb-shaped patch-2, a dielectric substrate-3, a grounding plate-4, a coaxial line-5, an outer conductor-51 and an inner conductor probe-52.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a microstrip patch antenna, which realizes the reduction of the electrical size of the microstrip patch antenna while keeping higher radiation efficiency.
The electrical dimensions are defined as: the actual size is divided by the operating wavelength. Since the antennas all involve electromagnetic waves, in which there is an operating wavelength, the electrical dimensions are more valuable than the actual dimensions. The electrical downsizing means that the electrical size is shorter if the operating wavelength is longer for the same physical size, or the electrical size is shorter if the actual size is smaller for the same operating wavelength, and both cases belong to the electrical downsizing.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a structural diagram of a microstrip patch antenna provided in an embodiment of the present invention; as shown in fig. 1, the present invention discloses a microstrip patch antenna, including: the comb-shaped patch 2, the dielectric substrate 3, the grounding plate 4 and the coaxial line 5; the comb-shaped patches 2 are stacked on the medium substrate 3; the dielectric substrate 3 is stacked on the grounding plate 4; the ground plate 4 is connected with the comb-shaped patch 2 through the coaxial line 5; the coaxial line 5, the grounding plate 4 and the comb-shaped patch 2 form a signal transmission loop; the coaxial line 5 feeds power to the comb-shaped patch 2, and a radio frequency electromagnetic field is generated between the comb-shaped patch 2 and the ground plate 4.
The comb-shaped patch 2 comprises a plurality of butterfly-shaped unit structures 1 which are periodically distributed.
After the comb-shaped patch 2 is loaded with a plurality of butterfly-shaped unit structures 1 which are periodically distributed, the shape of the comb-shaped patch 2 is similar to a comb.
Fig. 2 is a structural diagram of a butterfly unit structure of a microstrip patch antenna according to an embodiment of the present invention, and as shown in fig. 2, the butterfly unit structure 1 is formed by cutting off an isosceles triangle from each of two short sides of a rectangular patch, so as to form a structure similar to a butterfly, and a midpoint of a bottom side of the isosceles triangle coincides with a midpoint of the short side of the rectangular patch.
The butterfly-shaped unit structure 1 is a centrosymmetric structure, and the symmetric center is the intersection point of two diagonal lines of the butterfly-shaped unit structure 1; the butterfly-shaped unit structure 1 is W long and P wide, and the bottom sides and the heights of the isosceles triangles are L respectively 1 And W 1 Satisfies P = L 1 +2×L 2 ，W＝W 1 +W 2 。
In order to ensure that the butterfly unit structures are communicated, the requirement that W1 is less than W/2 is further specified in engineering 1 <W/2-d/2-S, wherein d is the diameter of the inner conductor probe 52 in the coaxial line 5, and S is a protection distance, generally not less than 1-2mm.
The butterfly unit structures 1 are symmetrical left and right and up and down.
In the embodiment of the present invention, the comb patch 2 is loaded with six butterfly unit structures 1.
The parameters of the loaded butterfly unit structure 1 are respectively as follows: p =5mm, w =40mm, w 1 ＝12mm，W 2 ＝28mm，L 1 =3mm and L 2 =1mm; fig. 3 is a structure diagram of a comb patch of a microstrip patch antenna provided in an embodiment of the present invention, as shown in fig. 3, the overall size of the comb patch 2 is L =6p =30mm, and w =40mm; the comb patch 2 has a thickness t =0.035mm.
At present, the commonly used method for solving the miniaturization requirement of the microstrip antenna is to use a dielectric substrate with high dielectric constant, but the high dielectric constant substrate is generally difficult to process and has higher cost; therefore, the dielectric substrate 3 of the embodiment of the invention adopts a conventional low-dielectric-constant dielectric substrate Rogers5880, and the relative dielectric constant epsilon r 2.2, a loss tangent tan delta of 0.0009, a transverse dimension G of 60mm, a thickness h of 4mm; the invention adopts the dielectric substrate with low dielectric constant to manufacture the microstrip patch antenna, can meet the miniaturization requirement and has lower cost.
A circular groove is formed in the center of the grounding plate 4; the transverse dimension G of the grounding plate 4 is 60mm, and the thickness t is 0.035mm.
The material of the grounding plate 4 and the comb-shaped patch 2 is any one metal of silver, copper and aluminum.
The grounding plate 4 and the comb-shaped patch 2 are made of an alloy of any of silver, copper and aluminum.
In the embodiment of the present invention, the characteristic impedance of the coaxial line 5 is 50 ohms, and the coaxial line 5 specifically includes: an outer conductor 51 and an inner conductor probe 52;
the outer conductor 51 is connected with the ground plate 4; the inner conductor probe 52 passes through the circular groove and is connected with the comb-shaped patch 2 through the dielectric substrate 3, the inner conductor probe 52 is not in contact with the circular groove, and the inner conductor probe 52 is used for feeding power to the comb-shaped patch 2.
Further, the period and internal dimensions of the butterfly unit structure 1, such as W, may be varied 1 ，W 2 ，L 1 Or L 2 And the comb-shaped patch 2 is optimally designed, so that the resonant frequency of the antenna is regulated and controlled.
Fig. 4 is a graph comparing reflection coefficient curves of the microstrip patch antenna provided by the embodiment of the present invention and a conventional microstrip patch antenna, and as shown in fig. 4, the size of the conventional microstrip patch antenna is completely the same as that of the embodiment of the present invention, and the material and thickness of the dielectric substrate 3 are also completely the same, the only difference is that the conventional microstrip patch antenna is a rectangular patch, and the microstrip patch antenna of the present invention is a comb-shaped patch.
As can be seen from fig. 4: the microstrip patch antenna provided by the embodiment of the invention resonates at 2306MHz (corresponding to a wavelength of lambda =130.095 mm), while the resonant frequency of a traditional rectangular microstrip patch antenna with the same size is 3040MHz (corresponding to a wavelength of lambda =98.684 mm); therefore, compared with the traditional rectangular microstrip patch antenna, the microstrip patch antenna provided by the embodiment of the invention has the advantages that the resonant frequency is obviously reduced; considering that the wavelengths of the two resonant frequencies are different, the normalized patch length of the microstrip patch antenna provided by the embodiment of the present invention is 0.2306 λ obtained by normalizing the physical patch length of 30mm to the respective wavelength, and the patch length of the conventional antenna is 0.304 λ, which shows that the microstrip patch antenna provided by the embodiment of the present invention realizes miniaturization, and compared with the conventional antenna, the comb-shaped patch length of the microstrip patch antenna provided by the embodiment of the present invention is reduced by about 24%.
The-10 dB impedance frequency of the microstrip patch antenna provided by the embodiment of the invention is 2286MHz to 2327MHz, the absolute bandwidth is 41MHz, and the relative bandwidth is about 1.78%.
Fig. 5 is a gain curve diagram of the microstrip patch antenna provided in the embodiment of the present invention, and it can be seen that at a resonant frequency point 2306MHz of the microstrip patch antenna provided in the embodiment of the present invention, the gain of the antenna is 6.66dBi; in the-10 dB impedance bandwidth 2286MHz-2327MHz of the microstrip patch antenna provided by the embodiment of the invention, the gain variation of the microstrip patch antenna provided by the embodiment of the invention is smaller and is all above 6.15 dBi; in summary, the microstrip patch antenna provided by the embodiment of the invention has a higher gain level, and can meet the application requirements.
Fig. 6 is a graph of efficiency of the microstrip patch antenna provided in the embodiment of the present invention, which shows that the antenna efficiency at a resonant frequency of 2306MHz is 94.27%, and meanwhile, the antenna efficiency of the microstrip patch antenna provided in the embodiment of the present invention is not lower than 84% within a-10 dB impedance bandwidth of 2286MHz-2327MHz of the microstrip patch antenna provided in the embodiment of the present invention; in summary, the microstrip patch antenna provided by the embodiment of the invention has higher efficiency despite the size reduction, and has great superiority in application.
Fig. 7 is an E-plane radiation pattern of the microstrip patch antenna provided in the embodiment of the present invention, and fig. 8 is an H-plane radiation pattern of the microstrip patch antenna provided in the embodiment of the present invention, where the resonant frequency points are all at 2306MHz, which shows that the microstrip patch antenna pattern provided in the embodiment of the present invention has very good far-field radiation characteristics, similar to that of the conventional antenna.
The microstrip patch antenna provided by the embodiment of the invention is a microstrip patch antenna loaded with six butterfly unit structures 1, and is loaded with a plurality of butterfly unit structures which are periodically distributed on the basis of the traditional rectangular patch, so that a comb-shaped patch is formed; the resonance frequency of the microstrip patch antenna provided by the embodiment of the invention is far lower than that of the traditional antenna with the same size; in terms of electrical size, compared with the conventional microstrip antenna, the microstrip patch antenna provided by the embodiment of the invention has the advantages that the electrical size is reduced by about 24%, and meanwhile, the microstrip patch antenna has the antenna gain of not less than 6.15dBi within the-10 dB working bandwidth and the antenna radiation efficiency of not less than 84%; the microstrip patch antenna provided by the embodiment of the invention has the advantages of simple structure, obvious effect, lower cost and good application prospect, and realizes the reduction of the electrical size of the microstrip patch antenna while keeping higher radiation efficiency.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A microstrip patch antenna, comprising: the comb-shaped patch, the dielectric substrate, the grounding plate and the coaxial line are arranged on the substrate;
the comb-shaped patches are stacked on the medium substrate; the dielectric substrate is stacked on the grounding plate; the ground plate is connected with the comb-shaped patch through the coaxial line;
the comb-shaped patch comprises a plurality of butterfly-shaped unit structures which are periodically distributed; the butterfly-shaped unit structure is formed by cutting off an isosceles triangle from each of two short sides of a rectangular patch, and the middle point of the bottom side of the isosceles triangle is superposed with the middle point of the short side of the rectangular patch;
the coaxial line, the grounding plate and the comb-shaped patch form a signal transmission loop; the coaxial line feeds power to the comb-shaped patch, and a radio-frequency electromagnetic field is generated between the comb-shaped patch and the grounding plate.
2. The microstrip patch antenna according to claim 1, wherein a circular groove is formed at a central position of the ground plate.
3. The microstrip patch antenna according to claim 2, wherein the coaxial line specifically comprises: an outer conductor and an inner conductor probe;
the outer conductor is connected with the grounding plate;
the inner conductor probe penetrates through the medium substrate through the circular groove to be connected with the comb-shaped patch, is not in contact with the circular groove, and is used for feeding power to the comb-shaped patch.
4. The microstrip patch antenna according to claim 1, wherein the butterfly element structure is a centrosymmetric structure.
5. Microstrip patch antenna according to claim 4, characterized in that the isosceles triangle has a height W 1 The long side of the rectangular patch is W, W 1 ＜W/2。
6. The microstrip patch antenna according to claim 1, wherein the ground plane and the comb patch are made of a metal selected from the group consisting of silver, copper and aluminum.
7. The microstrip patch antenna according to claim 1, wherein the ground plate and the comb patch are made of an alloy of any of silver, copper and aluminum.
8. The microstrip patch antenna according to claim 1, wherein the dielectric substrate has a relative permittivity ∈ r The value of tan delta was set to 2.2, the value of tan delta was set to 0.0009, and the thickness h was set to 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211118133.XA CN115332808A (en) | 2022-09-15 | 2022-09-15 | Microstrip patch antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211118133.XA CN115332808A (en) | 2022-09-15 | 2022-09-15 | Microstrip patch antenna |
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| CN115332808A true CN115332808A (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211118133.XA Pending CN115332808A (en) | 2022-09-15 | 2022-09-15 | Microstrip patch antenna |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2091944A (en) * | 1981-01-23 | 1982-08-04 | Standard Telephones Cables Ltd | Microstrip antenna |
| US6222490B1 (en) * | 2000-04-04 | 2001-04-24 | Smartant Telecomm Co., Ltd. | Fishbone-shaped patch antenna |
| US20030038750A1 (en) * | 2001-08-24 | 2003-02-27 | Gemtek Technology Co., Ltd. | Indented planar inverted F-type antenna |
| KR20050043178A (en) * | 2003-11-05 | 2005-05-11 | 충남대학교산학협력단 | Miniaturized microstrip patch antenna with slit structure |
| JP2007124014A (en) * | 2005-10-25 | 2007-05-17 | Toppan Forms Co Ltd | Broadband antenna |
| JP2009253549A (en) * | 2008-04-03 | 2009-10-29 | Hitachi Ltd | Rfid antenna and rfid tag |
-
2022
- 2022-09-15 CN CN202211118133.XA patent/CN115332808A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2091944A (en) * | 1981-01-23 | 1982-08-04 | Standard Telephones Cables Ltd | Microstrip antenna |
| US6222490B1 (en) * | 2000-04-04 | 2001-04-24 | Smartant Telecomm Co., Ltd. | Fishbone-shaped patch antenna |
| US20030038750A1 (en) * | 2001-08-24 | 2003-02-27 | Gemtek Technology Co., Ltd. | Indented planar inverted F-type antenna |
| KR20050043178A (en) * | 2003-11-05 | 2005-05-11 | 충남대학교산학협력단 | Miniaturized microstrip patch antenna with slit structure |
| JP2007124014A (en) * | 2005-10-25 | 2007-05-17 | Toppan Forms Co Ltd | Broadband antenna |
| JP2009253549A (en) * | 2008-04-03 | 2009-10-29 | Hitachi Ltd | Rfid antenna and rfid tag |
Non-Patent Citations (1)
| Title |
|---|
| 钟顺时: "《微带天线理论与应用》", 30 June 1991, 西安电子科技大学出版社 * |
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