CN116780175B - Broadband millimeter wave end-fire antenna - Google Patents
Broadband millimeter wave end-fire antenna Download PDFInfo
- Publication number
- CN116780175B CN116780175B CN202310885170.1A CN202310885170A CN116780175B CN 116780175 B CN116780175 B CN 116780175B CN 202310885170 A CN202310885170 A CN 202310885170A CN 116780175 B CN116780175 B CN 116780175B
- Authority
- CN
- China
- Prior art keywords
- strip
- metal
- ground
- short
- dielectric substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002184 metal Substances 0.000 claims abstract description 292
- 239000000758 substrate Substances 0.000 claims abstract description 47
- 230000005855 radiation Effects 0.000 claims abstract description 36
- 230000008878 coupling Effects 0.000 claims description 22
- 238000010168 coupling process Methods 0.000 claims description 22
- 238000005859 coupling reaction Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 4
- 230000003071 parasitic effect Effects 0.000 description 11
- 230000010354 integration Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 230000004044 response Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
-
- 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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention discloses a broadband millimeter wave end-fire antenna, which comprises: the antenna comprises a dielectric substrate, a radiation structure and a feed structure, wherein the dielectric substrate is provided with a first surface and a second surface which are opposite; the radiation structure is arranged on the first surface and comprises a metal short strip pair, a metal long strip and an S-shaped metal strip which are sequentially arranged along a first direction, wherein the metal short strip pair comprises two metal short strips which are arranged at intervals, the metal short strip pair and the metal long strip are arranged at intervals, and the first direction, the second direction and the thickness direction of the dielectric substrate are mutually perpendicular in pairs; the feed structure comprises a first metal ground, a second metal ground, an intermediate strip line and a metallized via hole, wherein the first metal ground is positioned on the first surface, the second metal ground is positioned on the second surface, and the first metal ground and the second metal ground are arranged opposite to each other; the middle strip line is arranged in the gap of the first metal ground; the metallized via penetrates through the dielectric substrate to connect the first metal ground and the second metal ground; the S-shaped metal strip connects the metal long strip with the middle strip line.
Description
Technical Field
The invention relates to the field of communication in general, in particular to the field of microwave communication, and particularly relates to a broadband millimeter wave end-fire antenna.
Background
With the popularization of 5G communication systems and the growth of global mobile data services, the communication spectrum below 6GHz is increasingly crowded, and the communication rate is limited by the working frequency, while the 5G millimeter wave band can avoid spectrum crowding and improve the communication rate, so that the development of antennas based on the 5G millimeter wave band is an important research field of high-rate mobile communication. In the millimeter wave frequency band, the integral system has higher requirement on the integration level, and the end-fire antenna is an important antenna in the millimeter wave field because the end-fire antenna is easy to share metal ground with the system, thereby meeting the high integration requirement of the millimeter wave system. The broadband millimeter wave end-fire antenna is beneficial to covering a plurality of working frequency bands of 5G millimeter waves, so that the compatibility of an antenna system to different areas and different systems is improved, and the broadband millimeter wave end-fire antenna has important research significance and engineering value.
Most of the end-fire antennas at present, such as log-periodic antennas, travelling wave antennas, spiral antennas and the like, have the problems of non-planar structures, incapability of integration caused by large size, or incapability of array scanning caused by large size and narrow beams, and are not the preferred schemes of millimeter wave end-fire antennas.
Currently, the quasi-yagi antenna is used as an important choice for realizing the millimeter wave broadband end-fire antenna, and the main design methods of the quasi-yagi antenna at present are as follows:
the first type is a traditional quasi-yagi antenna, which consists of a director, a driver and a metal reflection ground which are printed on a medium substrate, and the superposition of forward and backward waves in the end-fire direction is realized through a quarter wavelength between the driver and the reflection ground, so that the end-fire radiation with a certain bandwidth is realized, but the bandwidth of the antenna is narrower;
the second type is that a feed transition structure, a multistage driver or a spiral metamaterial resonator and the like are added in a traditional quasi-yagi antenna to introduce additional resonance points, so that the working bandwidth is expanded to a certain extent, but the antenna has larger transverse dimension or end-to-end dimension, so that the requirement of array spacing is not easily met, or the problem of narrower scanning range of a scanning array caused by narrow beams exists;
the third quasi-yagi antenna is realized by respectively combining a bowtie dipole and a bent dipole as drivers with a resonant reflector such as a folded strip or a negative magnetic conductivity structure, or adopting two Z-shaped dipoles which are closely arranged as drivers and the resonant reflector, compared with the second quasi-yagi antenna, the planar size of the antenna is reduced by sacrificing a certain working bandwidth, and the bandwidth is still wider than that of the traditional quasi-yagi antenna, but the antenna is not easy to be coplanar with a system due to a mode of feeding the antenna perpendicular to the plane and the resonant reflector adopted by the antenna, or the resonant reflector fails when facing the system ground, so that the high integration requirement of a millimeter wave frequency band is not met;
the fourth type adopts a bent monopole to replace a driver of a traditional quasi-yagi antenna or adopts a short-circuit branch loading type strip resonator to couple and excite a pair of U-shaped full-wave dipoles, and the design has the characteristics of wide band, compactness, integration and the like, but the symmetry of current is greatly influenced by frequency change, so that the symmetry of radiation in the wide band cannot be ensured.
Therefore, the conventional millimeter wave broadband end-fire antenna cannot comprehensively consider the aspects of broadband matching, compact structure, plane integration, symmetrical directional patterns in a broadband and the like.
Disclosure of Invention
In view of the foregoing drawbacks or deficiencies of the prior art, it is desirable to provide a broadband millimeter wave end-fire antenna.
The embodiment of the invention provides a broadband millimeter wave end-fire antenna, which comprises: the dielectric substrate is provided with a first surface and a second surface which are opposite in the thickness direction;
the radiation structure is arranged on the first surface and comprises a metal short strip pair, a metal long strip and an S-shaped metal strip which are sequentially arranged along a first direction, wherein the metal short strip pair comprises two metal short strips which are arranged at intervals in a second direction, the metal short strip pair and the metal long strip are arranged at intervals in the first direction, the metal short strip and the metal long strip are all arranged along the second direction in an extending mode, one end of the S-shaped metal strip is connected with the metal long strip, and the first direction, the second direction and the thickness direction of the dielectric substrate are perpendicular to each other;
the feed structure comprises a first metal ground, a second metal ground, an intermediate strip line and a metallized via hole, wherein the first metal ground is positioned on the first surface, the second metal ground is positioned on the second surface, and the first metal ground and the second metal ground are arranged opposite to each other in the thickness direction of the dielectric substrate; the first metal ground is provided with a gap, and the middle strip line is arranged in the gap; the metallized via penetrates through the dielectric substrate to connect the first metal ground and the second metal ground;
the first metal ground is located at one side of the metal long strip far away from the metal short strip, the S-shaped metal strip is located between the metal long strip and the first metal ground, and the other end of the S-shaped metal strip is connected with the middle strip line.
In some examples, the dielectric substrate is rectangular in shape, the dielectric substrate having a first axis of symmetry along the first direction;
the two metal short strips are symmetrically arranged about the first symmetry axis, and the metal long strips are in axisymmetric structures about the first symmetry axis;
the S-shaped metal strip is in a central symmetry pattern, and the symmetry center of the S-shaped metal strip is positioned on the first symmetry axis.
In some examples, the S-shaped metal strip includes a first longitudinal strip, a first transverse strip, a second longitudinal strip, a second transverse strip, and a third longitudinal strip connected in sequence, each longitudinal strip extending in the first direction, each transverse strip extending in the second direction, the first longitudinal strip being connected to the metal strip, the third longitudinal strip being connected to the intermediate strip line; the second longitudinal strip is in an axisymmetric structure about the first axis of symmetry.
In some examples, the metal short strip has a length of 0.2λ 0 ～0.22λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the length of the metal long strip is 0.32lambda 0 ～0.34λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the distance between the two metal short strips in the second direction is 0.015 lambda 0 ～0.025λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the metal short strips and the metal long strips are arranged at the first positionA pitch in one direction of 0.04 lambda 0 ～0.06λ 0 ；
Wherein lambda is 0 Is the free space wavelength corresponding to the center frequency.
In some examples, the metal strip has a first end and a second end;
in the second direction, the first longitudinal strip is closer to the first end and farther from the second end than the third longitudinal strip;
the connection part of the first longitudinal strip and the metal long strip is a first contact point, and the distance from the first contact point to the first end is 0.25-0.35 of the length of the metal long strip.
In some examples, the second transverse strip is spaced from the metal long strip by a distance of 0.01λ in the first direction 0 ～0.03λ 0 ，λ 0 Is the free space wavelength corresponding to the center frequency.
In some examples, the length of the first transverse strip is 0.13λ 0 ～0.15λ 0 ，λ 0 Is the free space wavelength corresponding to the center frequency.
In some examples, the slit is rectangular, and the intermediate strip line extends along the first direction and is located on the same line as the third longitudinal strip line.
In some examples, the material of the dielectric substrate is Rogers RO4003C; the length of the radiation structure in the first direction is 0.31λ 0 。
In some examples, the metallic long strip mode of operation is a half wavelength mode; and/or the number of the groups of groups,
the working mode of the metal short strip pair is an odd coupling full-wave mode.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects:
the broadband millimeter wave end-fire antenna provided by the embodiment of the invention forms a radiation structure by utilizing the S-shaped metal strip, the metal long strip and the metal short strip pair, and the S-shaped metal strip enables the antenna to obtain equivalent inductance capacitance parasitic resonance, and is matched with odd coupling full-wave resonance of the metal short strip pair and half-wavelength resonance of the metal long strip, so that the millimeter wave end-fire antenna has wider millimeter wave working bandwidth; the first metal ground and the second metal ground are respectively positioned on two opposite surfaces of the dielectric substrate and are connected through a metallized via hole penetrating through the dielectric substrate, and the middle strip line is positioned in a gap of the first metal ground, so that the antenna has the characteristic of plane integrability; by reasonably setting the size and structural characteristics of the S-shaped metal strip, the metal long strip and the metal short strip pair in the radiation structure, the antenna has the characteristics of compact structure, symmetrical directional patterns in a wide frequency band and the like.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a broadband millimeter wave end-fire antenna according to an embodiment of the present invention;
fig. 2 is a schematic side view of a broadband millimeter wave end-fire antenna according to an embodiment of the present invention;
fig. 3 is a schematic diagram of matching response and gain response of a broadband millimeter wave end-fire antenna according to an embodiment of the present invention;
fig. 4 is an E-plane simulated radiation pattern of the wideband millimeter wave end-fire antenna provided by the embodiment of the invention at 26 GHz;
fig. 5 is an H-plane simulated radiation pattern of the wideband millimeter wave end-fire antenna provided by the embodiment of the invention at 26 GHz;
fig. 6 is an E-plane simulated radiation pattern of the wideband millimeter wave end-fire antenna provided by the embodiment of the invention at 33 GHz;
fig. 7 is an H-plane simulated radiation pattern of the broadband millimeter wave end-fire antenna provided by the embodiment of the invention at 33 GHz;
fig. 8 is an E-plane simulated radiation pattern of the wideband millimeter wave end-fire antenna provided by the embodiment of the invention at 40 GHz;
fig. 9 is an H-plane simulated radiation pattern of the wideband millimeter wave end-fire antenna provided by the embodiment of the invention at 40 GHz.
Reference numerals illustrate:
1-a dielectric substrate, 11-a first surface, 12-a second surface, 13-a first symmetry axis,
2-radiating structure, 21-metal short stripe pair, 211-metal short stripe, 22-metal long stripe, 221-first end, 222-second end, 223-first contact point, 23-S-shaped metal stripe, 231-first longitudinal stripe, 232-first transverse stripe, 233 second longitudinal stripe, 234-second transverse stripe, 235-third longitudinal stripe,
3-first metal ground, 31-slit, 4-second metal ground, 5-intermediate strip line, 6-metallized via,
the transverse direction of the x-dielectric substrate, the longitudinal direction of the y-dielectric substrate and the thickness direction of the z-dielectric substrate.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The broadband millimeter wave end-fire antenna of the embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, an embodiment of the present invention provides a broadband millimeter wave end-fire antenna, including: a dielectric substrate 1, a radiation structure 2, and a feeding structure, the dielectric substrate 1 having a first surface 11 and a second surface 12 opposite to each other in a thickness direction thereof;
the radiation structure 2 is arranged on the first surface 11, the radiation structure 2 comprises a metal short strip pair 21, a metal long strip 22 and an S-shaped metal strip 23 which are sequentially arranged along a first direction, the metal short strip pair 21 comprises two metal short strips 211 which are arranged at intervals along a second direction, the metal short strip pair 21 and the metal long strip 22 are arranged at intervals along the first direction, the metal short strips 211 and the metal long strips 22 are all arranged in an extending way along the second direction, one end of the S-shaped metal strip 23 is connected with the metal long strip 22, and the first direction, the second direction and the thickness direction of the dielectric substrate 1 are mutually perpendicular;
the feed structure comprises a first metal ground 3, a second metal ground 4, an intermediate strip line 5 and a metallized via hole 6, wherein the first metal ground 3 is positioned on a first surface 11, the second metal ground 4 is positioned on a second surface 12, and the first metal ground 3 and the second metal ground 4 are arranged opposite to each other in the thickness direction of the dielectric substrate 1; the first metal land 3 is provided with a gap 31, and the middle strip line 5 is arranged in the gap 31; a metallized via 6 penetrates the dielectric substrate 1 to connect the first metal ground 3 and the second metal ground 4;
the first metal land 3 is located on the side of the long metal strip 22 remote from the short metal strip 211, and the S-shaped metal strip 23 is located between the long metal strip 22 and the first metal land 3, and the other end of the S-shaped metal strip 23 is connected to the intermediate strip line 5.
Referring to fig. 1 and 2, x denotes a lateral direction of the dielectric substrate 1, y denotes a longitudinal direction of the dielectric substrate 1, and z denotes a thickness direction of the dielectric substrate 1. In fig. 1, a lateral direction x indicates a left-to-right direction, and a longitudinal direction y indicates a bottom-to-top direction; in fig. 2, the thickness direction z indicates a direction from the first surface 11 toward the second surface 12. The first direction may be understood as the opposite direction to the transverse direction x, based on the transverse direction x, the longitudinal direction y and the thickness direction z; the second direction may be the longitudinal direction y or may be the opposite direction of the longitudinal direction y.
Specifically, the pair of metal short strips 21, the metal long strip 22, and the S-shaped metal strip 23 connected to the intermediate strip line 5 form the radiation structure 2; the first metal ground 3, the second metal ground 4, the intermediate strip line 5 and the metallized via hole 6 form a coplanar waveguide line, and the coplanar waveguide line is used as a feed structure of the broadband millimeter wave end-fire antenna, the intermediate strip line 5 is a signal transmission line, and the first metal ground 3 and the second metal ground 4 are collectively called as a metal ground structure, so that the broadband millimeter wave end-fire antenna has wider working bandwidth, and simultaneously has the characteristics of compact structure and plane integrability. Wherein the metallized via holes 6 can be hollow metal via holes or solid metal via holes, and hollow metal via holes are usually selected; the shape of the metallized via may be circular, square, or other shapes.
When the wideband millimeter wave end-fire antenna provided in this embodiment works, millimeter wave signals are fed in through the intermediate strip line 5 and transmitted to the S-shaped metal strip 23, then transmitted to the metal long strip 22 through point contact transmission and coupling, and then coupled to the metal short strip pair 21, so as to form wideband end-fire radiation.
In some embodiments, the metallic long strips 22 are operated in a half-wavelength mode, and the polarized electric fields of the metallic short strips are superimposed in the endfire direction due to the closer distance from the metallic short strip pair 21, which together contribute to the radiation.
In some embodiments, the metal short stripe pair 21 mode of operation is an odd coupled full wave mode. The two metal short strips 211 respectively work in a half-wavelength mode, odd coupling is formed through a gap between the two metal short strips 211, and then the metal short strip pair 21 integrally works in an odd coupling full-wave mode, so that the horizontal electric field directions of the two metal short strips 211 along the x direction are the same, the two metal short strips 211 are mutually overlapped in the end-shooting direction of the antenna, and end-to-end radiation is shown. The end-shot direction is specifically a direction from the middle strip line 5 to the metal short strip pair 21, wherein the side where the metal short strip pair 21 is located is the front end of the end-shot direction, and the side where the middle strip line 5 is located is the rear end of the end-shot direction.
In some embodiments, the S-shaped metal strip 23 comprises a first longitudinal strip 231, a first transverse strip 232, a second longitudinal strip 233, a second transverse strip 234, and a third longitudinal strip 235 connected in sequence, each longitudinal strip extending in a first direction, each transverse strip extending in a second direction, the first longitudinal strip 231 being connected to the metal strip 22, the third longitudinal strip 235 being connected to the intermediate strip line 5.
The S-shaped metal strip 23 interacts with the metal strip 22 and the metal ground structure to form parasitic resonance, and the parasitic resonance equivalent circuit is composed of one series inductance and two parallel capacitances, wherein the series inductance is derived from the S-shaped metal strip 23 itself, one parallel capacitance is derived from the coupling between the second transverse strip 234 of the S-shaped metal strip 23 and the metal strip 22, and the other parallel capacitance is derived from the coupling between the first transverse strip 232 of the S-shaped metal strip 23 and the metal ground structure.
In this embodiment, the S-shaped metal strip 23, the metal long strip 22 and the metal short strip pair 21 are used to form a radiation structure, the S-shaped metal strip 23 makes the antenna obtain equivalent inductance capacitance parasitic resonance, and the odd coupling full-wave resonance of the metal short strip pair 21 and half-wavelength resonance of the metal long strip 22 are matched, so that the millimeter wave end-fire antenna has a wider millimeter wave working bandwidth; the co-operating arrangement provides that the intermediate strip 5 is located in the slot 31 of the first metal ground 3 so that the antenna has planar integrable properties.
Thus, three reflection zeroes are generated in the working process of the broadband millimeter wave end-fire antenna provided by the embodiment of the invention, and the method specifically comprises the following steps:
the first reflection zero point is from parasitic resonance formed by interaction of the S-shaped metal strip 23, the metal long strip 22 and the metal ground structure, the parasitic resonance equivalent circuit is composed of a series inductance and two parallel capacitances, the series inductance is from the S-shaped metal strip 23, the inductance value is dependent on the line width and the length of the S-shaped metal strip 23, one parallel capacitance is from the coupling between the second transverse strip 234 and the metal long strip 22 of the S-shaped metal strip 23, the other parallel capacitance is from the coupling between the first transverse strip 232 and the metal ground structure of the S-shaped metal strip 23, and the capacitance values of the two parallel capacitances are dependent on the length of the second transverse strip 234 and the distance between the second transverse strip 234 and the metal long strip 22, the length of the first transverse strip 232 and the distance between the first transverse strip 232 and the metal ground structure;
the second reflection zero point is generated by resonance of the pair of metal short strips 21, the two metal short strips 211 work in a half-wavelength mode and form odd coupling through a gap in the middle, and the odd coupling full-wave mode is integrally formed, so that the horizontal electric field directions of the two metal short strips 211 along the x direction are the same, the two metal short strips are mutually overlapped in the end-emission direction of the antenna, and end-emission is shown;
the third reflection zero is provided by the long metal strips 22, and the long metal strips 22 work in a half-wavelength mode, and the polarized electric fields of the short metal strips and the short metal strips are overlapped in the end-emission direction due to the fact that the short metal strips are closer to the short metal strips 21, so that radiation is contributed together.
The metal short strip pair 21 realizes mutual coupling by utilizing the middle gap, which is beneficial to reducing the quality factor of the resonance frequency point, the resonance point is used as a second resonance point to be beneficial to improving the whole working frequency band, and the parasitic resonance and the quality factors of the first resonance point and the third resonance point realized by the metal long strip 22 are relatively higher, which is beneficial to the rapid reduction of the out-of-band gain of the antenna. Meanwhile, the metal short strip pair 21 is beneficial to realizing integral matching under the condition of smaller distance with the metal ground structure, and the end-shooting direction size can be reduced.
In this embodiment, the metal short strips 211 and the metal long strips 22 are all arranged to extend along the second direction. Preferably, the metal short strip 211 and the metal long strip 22 are respectively rectangular in the transverse direction x of the dielectric substrate 1, so that the structures of the metal short strip 211 and the metal long strip 22 are simple, the structure of the broadband millimeter wave end-fire antenna can be effectively simplified, and the antenna is convenient to process.
In some embodiments, the slit 31 is rectangular in shape, and the intermediate strip line 5 extends in the first direction and is aligned with the third longitudinal strip 235.
In the transverse direction x of the dielectric substrate 1, the first metal ground 3 is divided by a slit 31 into two sub-portions, between which the intermediate strip 5 and both sub-portions there are gaps. For example, in the transverse direction x of the dielectric substrate 1, the intermediate strip line 5 is centrally arranged in the slot 31. The slot 31 and the middle strip line 5 are all arranged along the longitudinal direction y of the dielectric substrate 1 in an extending mode, and the slot 31 and the middle strip line 5 are respectively in a straight line shape, so that the antenna has a wider millimeter wave working bandwidth, meanwhile, the antenna structure is effectively simplified, and the antenna is convenient to process.
It will be appreciated that the first surface 11 is the front side of the dielectric substrate 1, the second surface 12 is the back side of the dielectric substrate 1, and the second metal ground 4 is the back ground. If the slit 31 of the first metal land 3 is omitted, the orthographic projection of the first metal land 3 on the second surface 12 along the thickness direction z is preferably overlapped with the second metal land 4, so that the structure of the antenna can be simplified, and the antenna can be conveniently processed.
In some embodiments, the dielectric substrate 1 is rectangular in shape, the dielectric substrate 1 having a first axis of symmetry 13 along a first direction;
the two metal short strips 211 are symmetrically arranged about the first symmetry axis 13, and the metal long strips 22 are in axisymmetric structure about the first symmetry axis 13;
the S-shaped metal strip 23 is in a central symmetrical pattern, the symmetry center of the S-shaped metal strip 23 being located on the first symmetry axis 13.
Referring to fig. 1, a broken line extending in the longitudinal direction y in the middle of the transverse direction x of the dielectric substrate 1 illustrates a first symmetry axis 13. The metal short strip pair 21 and the metal long strip 22 are in axisymmetric structures about the first symmetry axis 13, the S-shaped metal strip 23 is in a central symmetric pattern, and the symmetric center of the S-shaped metal strip 23 is positioned on the first symmetry axis 13, so that the antenna can obtain a symmetric half-power radiation pattern in a broadband matching range.
Further, the second longitudinal strip 233 is in an axisymmetric structure about the first symmetry axis 13.
Referring to fig. 1 and 2, two sub-portions of the first metal land 3 divided by the slit 31 are respectively rectangular, and the shape of the first metal land 3 can be understood as rectangular when the slit 31 is omitted, and the shape of the second metal land is rectangular. Since the S-shaped metal strip has a central symmetry structure and the second longitudinal strip 233 has an axial symmetry structure about the first symmetry axis 13, the first longitudinal strip 231 and the third longitudinal strip 235 are symmetrical about the first symmetry axis 13, the second longitudinal strip 233 is located on the center line of the antenna, and the distance from the first transverse strip 232 to the first metal ground 3 is the same as the distance from the second transverse strip 234 to the metal long strip 22.
With such a configuration, the first longitudinal strips 231 and the metal long strips 22 form a point feed, and the second transverse strips 234 provide a coupling feed, so that the metal long strips 22 and the metal short strip pairs 21 obtain a relatively symmetrical current distribution in the whole broadband matching frequency range, thereby obtaining a symmetrical half-power radiation pattern in the whole broadband matching range. Meanwhile, the parasitic series inductance from the S-shaped metal strip 23 itself, the coupling between the first transverse strip 232 and the metal ground structure and the coupling between the second transverse strip 234 and the metal long strip 22 form two parasitic parallel capacitances, so that parasitic resonance is formed together, the resonance point of the antenna is increased, and the bandwidth is improved.
In some embodiments, the length of the metal short strip 211 is 0.2λ 0 ～0.22λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the length of the metal long strip 22 is 0.32λ 0 ～0.34λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the distance between the two metal short strips 211 in the second direction is 0.015 lambda 0 ～0.025λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the distance between the metal short strips 21 and the metal long strips 22 in the first direction is 0.04 lambda 0 ～0.06λ 0 ；
Wherein lambda is 0 Is the free space wavelength corresponding to the center frequency.
Specifically, the length of the metal short strip 211 is 0.2λ 0 ～0.22λ 0 The length of the metal long strip 22 is 0.32λ 0 ～0.34λ 0 The distance between the two metal short strips 211 in the second direction is 0.015 lambda 0 ～0.025λ 0 The distance between the metal short strips 21 and the metal long strips 22 in the first direction is 0.04 lambda 0 ～0.06λ 0 The structure of the antenna can be compact;
the two metal short strips 211 in the metal short strip pair 21 are symmetrically distributed on the first surface 11 of the dielectric substrate 1 and are positioned at the forefront end of the antenna in the end-fire direction, and the length of each metal short strip 211 is 0.2-0.22λ 0 The distance between the two metal short strips 211 in the second direction is 0.015-0.025 lambda 0 Under the condition of the length of the metal short strip 211 and the gap coupling existing in the middle of the metal short strip pair 21, the whole metal short strip pair 21 works in an odd coupling full-wave mode, the quality factor of the resonance mode is low, and the resonance point is used as a second resonance point of the antenna, so that the whole bandwidth of the antenna can be better improved;
the long metal strips 22 are closely arranged between the pair of short metal strips 21 and the S-shaped metal strip 23 and symmetrically distributed on the first surface 11 of the dielectric substrate 1, the length of the long metal strips 22 is between 0.32 and 0.34 lambda 0, and the long metal strips operate in a half-wavelength mode and serve as a third resonance point of the antenna, so that the wide operating bandwidth can be obtained under the compact size.
In some embodiments, the metal strip 22 has a first end 221 and a second end 222;
in the second direction, the first longitudinal strip 231 is closer to the first end 221 and farther from the second end 222 than the third longitudinal strip 235;
the connection between the first longitudinal strip 231 and the metal strip 22 is a first contact point 223, and the distance from the first contact point 223 to the first end 221 is 0.25-0.35 of the length of the metal strip 22.
The arrangement can drive the metal long strip 22 to work in a half-wavelength mode, and the coupled drive metal short strip pair 21 to work in an odd coupled full-wave mode, and simultaneously meets the requirement that the whole matched frequency band covers the whole 5G millimeter wave frequency band. For example, the ratio of the distance from the first contact point 223 to the first end 221 to the length of the long metal strip 22 may be any of the following: 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33, 0.34, or 0.35.
In some embodiments, the second transverse strip 234 is spaced from the metal strip 22 by a distance of 0.01λ in the first direction 0 ～0.03λ 0 ，λ 0 Is the free space wavelength corresponding to the center frequency. The combination of the ratio between the distance from the first contact point 223 to the first end 221 and the length of the long metal strip 22 effectively excites the long metal strip 22 to operate in the half-wavelength mode.
In some embodiments, the length of the first transverse strip 232 is 0.13λ 0 ～0.15λ 0 ，λ 0 Is the free space wavelength corresponding to the center frequency. The combination of the ratio between the distance from the first contact point 223 to the first end 221 and the length of the long metal strip 22 effectively excites the long metal strip 22 to operate in the half-wavelength mode.
In some embodiments, the material of the dielectric substrate 1 is Rogers RO4003C, based on dielectric constant and loss tangent. The material of the dielectric substrate 1 is preferably Rogers RO4003C, which has low loss, stable electrical characteristics at different frequencies, and low cost, thereby ensuring the performance of the antenna and reducing the production cost of the antenna.
In some embodiments, the length of the radiating structure 2 in the first direction and the bandwidth of the antenna are a pair of opposite indicators, and in general, the smaller the length occupied by the radiating structure 2 in the first direction, the narrower the bandwidth of the antenna. In order to achieve both compactness and a wide operating bandwidth of the antenna, it is preferred that the length of the radiating structure 2 in the first direction is 0.31λ 0 The antenna has a compact structure and a wider bandwidth.
For example, in a specific embodiment, the simulated matching response and gain response of the antenna are shown in fig. 3, and it can be seen that the matching response curve has 3 reflection zeroes, the 10-dB matching bandwidth ranges from 23.9 GHz to 41.7GHz, the relative bandwidth can reach 54.27%, and the average gain in the frequency band is 5.13dBi.
FIGS. 4 and 5 are simulated radiation patterns of the broadband millimeter wave end-fire antenna at 26GHz and simulated radiation patterns of the antenna at the E-plane and the H-plane, respectively, with 3-dB beam bandwidths of the antenna at 70.3 DEG and 153.8 DEG on the E-plane and the H-plane, respectively; FIGS. 6 and 7 are simulated radiation patterns of the broadband millimeter wave end-fire antenna on the E plane and the H plane at 33GHz, respectively, and the 3-dB beam bandwidths of the antenna on the E plane and the H plane are 69.2 DEG and 130.6 DEG respectively; fig. 8 and 9 are respectively an E-plane simulated radiation pattern and an H-plane simulated radiation pattern of the wideband millimeter wave end-fire antenna at 40GHz, and the 3-dB beam bandwidths of the antenna are 63.4 ° and 111.1 ° on the E-plane and the H-plane, respectively. Therefore, the directional diagram curve in the half power range of the broadband millimeter wave end-fire antenna has better symmetry in the whole frequency band.
In the embodiment of the invention, the S-shaped metal strip 23, the metal long strip 22 and the low-quality factor metal short strip pair 21 are closely arranged, and the broadband millimeter wave end-fire antenna is realized by combining point feed and coupling feed, so that the antenna can obtain three resonance points, namely equivalent inductance capacitance parasitic resonance of the S-shaped metal strip 23, odd coupling full-wave mode resonance of the metal short strip pair 21 and half-wavelength resonance of the metal long strip 22; in terms of antenna radiation characteristics, by the point contact of the first longitudinal strip 231 of the S-shaped metal strip 23 and the metal long strip 22 and the coupling of the second transverse strip 234 of the S-shaped metal strip 23 and the metal long strip 22, the metal long strip 22 and the metal short strip pair 21 can obtain a relatively symmetrical current distribution in the whole broadband matching frequency range, so that a symmetrical half-power radiation pattern in the whole broadband matching range is obtained. The broadband millimeter wave end-fire antenna provided by the embodiment of the invention not only can obtain wider millimeter wave working bandwidth, but also can have the characteristics of compact structure, plane integration, symmetrical patterns in a broadband and the like.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The present invention employs first, second, etc. to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, a first message may also be referred to as a second message, and similarly, a second message may also be referred to as a first message, without departing from the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The above description is only illustrative of the preferred embodiments of the present invention and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the invention referred to in the present invention is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present invention (but not limited to) having similar functions are replaced with each other.
Claims (7)
1. A broadband millimeter wave end-fire antenna comprising: a dielectric substrate (1), a radiation structure (2) and a feed structure, the dielectric substrate (1) having opposite first and second surfaces (11, 12) in a thickness direction thereof;
the radiation structure (2) is arranged on the first surface (11), the radiation structure (2) comprises a metal short strip pair (21), a metal long strip (22) and an S-shaped metal strip (23) which are sequentially arranged along a first direction, the metal short strip pair (21) comprises two metal short strips (211) which are arranged at intervals in a second direction, the metal short strip pair (21) and the metal long strip (22) are arranged at intervals in the first direction, the metal short strips (211) and the metal long strip (22) are all arranged in an extending mode along the second direction, one end of the S-shaped metal strip (23) is connected with the metal long strip (22), and the first direction, the second direction and the thickness direction of the medium substrate (1) are perpendicular to each other;
the feed structure comprises a first metal ground (3), a second metal ground (4), an intermediate strip line (5) and a metallized via hole (6), wherein the first metal ground (3) is positioned on the first surface (11), the second metal ground (4) is positioned on the second surface (12), and the first metal ground (3) and the second metal ground (4) are oppositely arranged in the thickness direction of the dielectric substrate (1); the first metal ground (3) is provided with a gap (31), and the middle strip line (5) is arranged in the gap (31); the metallized via (6) penetrates through the dielectric substrate (1) to connect the first metal ground (3) and the second metal ground (4);
the first metal ground (3) is positioned on one side of the metal long strip (22) far away from the metal short strip (211), the S-shaped metal strip (23) is positioned between the metal long strip (22) and the first metal ground (3), and the other end of the S-shaped metal strip (23) is connected with the middle strip line (5);
the dielectric substrate (1) is rectangular, and the dielectric substrate (1) is provided with a first symmetry axis (13) along the first direction;
the two metal short strips (211) are symmetrically arranged about the first symmetry axis (13), and the metal long strips (22) are in axisymmetric structures about the first symmetry axis (13);
the S-shaped metal strip (23) is in a central symmetrical pattern, and the symmetrical center of the S-shaped metal strip (23) is positioned on the first symmetrical axis (13);
the S-shaped metal strip (23) comprises a first longitudinal strip (231), a first transverse strip (232), a second longitudinal strip (233), a second transverse strip (234) and a third longitudinal strip (235) which are connected in sequence, wherein each longitudinal strip extends along the first direction, each transverse strip extends along the second direction, the first longitudinal strip (231) is connected with the metal long strip (22), and the third longitudinal strip (235) is connected with the middle strip line (5); -said second longitudinal strip (233) is of axisymmetric structure with respect to said first symmetry axis (13);
the working mode of the metal long strip (22) is a half-wavelength mode;
the working mode of the metal short strip pair (21) is an odd coupling full-wave mode.
2. The broadband millimeter wave end-fire antenna of claim 1, wherein,
the length of the metal short strip (211) is 0.2lambda 0 ～0.22λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the length of the metal long strip (22) is 0.32lambda 0 ～0.34λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the distance between the two metal short strips (211) in the second direction is 0.015 lambda 0 ～0.025λ 0 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
the distance between the metal short strip pair (21) and the metal long strip (22) in the first direction is 0.04 lambda 0 ～0.06λ 0 ；
Wherein lambda is 0 Is the free space wavelength corresponding to the center frequency.
3. The broadband millimeter-wave end-fire antenna of claim 1, wherein said metal strip (22) has a first end (221) and a second end (222);
in the second direction, the first longitudinal strip (231) is closer to the first end (221) than the third longitudinal strip (235), farther from the second end (222);
the connection part of the first longitudinal strip (231) and the metal long strip (22) is a first contact point (223), and the distance from the first contact point (223) to the first end (221) is 0.25-0.35 of the length of the metal long strip (22).
4. The broadband millimeter wave end-fire antenna of claim 1, wherein said second transverse strip (234) is spaced from said metal long strip (22) by a distance of 0.01λ in said first direction 0 ～0.03λ 0 ，λ 0 Is the free space wavelength corresponding to the center frequency.
5. The broadband millimeter wave end-fire antenna of claim 1, wherein the length of the first transverse strip (232) is 0.13 λ 0 ～0.15λ 0 ，λ 0 Is the free space wavelength corresponding to the center frequency.
6. Broadband millimeter wave end-fire antenna according to claim 1, characterized in that said slot (31) is rectangular in shape, said intermediate strip (5) being arranged extending in said first direction and being co-linear with said third longitudinal strip (235).
7. The broadband millimeter wave endfire of claim 1The antenna is characterized in that the material of the dielectric substrate (1) is Rogers RO4003C; the length of the radiation structure (2) in the first direction is 0.31λ 0 ，λ 0 Is the free space wavelength corresponding to the center frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310885170.1A CN116780175B (en) | 2023-07-18 | 2023-07-18 | Broadband millimeter wave end-fire antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310885170.1A CN116780175B (en) | 2023-07-18 | 2023-07-18 | Broadband millimeter wave end-fire antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116780175A CN116780175A (en) | 2023-09-19 |
| CN116780175B true CN116780175B (en) | 2024-04-16 |
Family
ID=87994641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310885170.1A Active CN116780175B (en) | 2023-07-18 | 2023-07-18 | Broadband millimeter wave end-fire antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116780175B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007194915A (en) * | 2006-01-19 | 2007-08-02 | Sony Corp | Antenna system, antenna reflector, and radio communication apparatus with built-in antenna |
| CN101409382A (en) * | 2008-09-28 | 2009-04-15 | 东南大学 | Gradual change grooved wire antenna loaded by passive metal grid |
| CN201966319U (en) * | 2011-01-21 | 2011-09-07 | 杭州电子科技大学 | Wideband low-profile cavity backed integrated antenna |
| CN105119044A (en) * | 2015-09-09 | 2015-12-02 | 华为技术有限公司 | Radiating patch, microstrip antenna and communication device |
| CN106229657A (en) * | 2016-08-31 | 2016-12-14 | 重庆大学 | Huygens source antenna |
| CN106299705A (en) * | 2016-10-20 | 2017-01-04 | 南京理工大学 | A kind of planar broad band filter antenna |
| CN107196054A (en) * | 2017-05-22 | 2017-09-22 | 王奕贝 | The Quasi-Yagi antenna of wireless communication system |
| CN211655058U (en) * | 2020-03-03 | 2020-10-09 | 南京锐码毫米波太赫兹技术研究院有限公司 | Miniaturized broadband dual-polarization magnetoelectric dipole millimeter wave edge-emitting antenna and array thereof |
| CN112886246A (en) * | 2021-01-19 | 2021-06-01 | 南通大学 | Planar integrated microwave millimeter wave common-caliber edge-emitting antenna |
| CN113013626A (en) * | 2021-03-21 | 2021-06-22 | 南通大学 | Directional diagram reconfigurable end-fire antenna |
| CN113285229A (en) * | 2021-06-07 | 2021-08-20 | 南京邮电大学 | High-gain end-fire circularly polarized antenna based on artificial surface plasmon polariton |
| CN115051154A (en) * | 2022-07-27 | 2022-09-13 | 重庆邮电大学 | Differential broadband end-fire filtering antenna based on open stepped slot |
| CN218677564U (en) * | 2022-11-28 | 2023-03-21 | 天津光电通信技术有限公司 | Single-frequency band and dual-frequency band reconfigurable microstrip quasi-yagi antenna |
| CN116315654A (en) * | 2023-02-20 | 2023-06-23 | 中国移动通信集团云南有限公司 | 5G high-gain broadband antenna applied to indoor coverage |
-
2023
- 2023-07-18 CN CN202310885170.1A patent/CN116780175B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007194915A (en) * | 2006-01-19 | 2007-08-02 | Sony Corp | Antenna system, antenna reflector, and radio communication apparatus with built-in antenna |
| CN101409382A (en) * | 2008-09-28 | 2009-04-15 | 东南大学 | Gradual change grooved wire antenna loaded by passive metal grid |
| CN201966319U (en) * | 2011-01-21 | 2011-09-07 | 杭州电子科技大学 | Wideband low-profile cavity backed integrated antenna |
| CN105119044A (en) * | 2015-09-09 | 2015-12-02 | 华为技术有限公司 | Radiating patch, microstrip antenna and communication device |
| CN106229657A (en) * | 2016-08-31 | 2016-12-14 | 重庆大学 | Huygens source antenna |
| CN106299705A (en) * | 2016-10-20 | 2017-01-04 | 南京理工大学 | A kind of planar broad band filter antenna |
| CN107196054A (en) * | 2017-05-22 | 2017-09-22 | 王奕贝 | The Quasi-Yagi antenna of wireless communication system |
| CN211655058U (en) * | 2020-03-03 | 2020-10-09 | 南京锐码毫米波太赫兹技术研究院有限公司 | Miniaturized broadband dual-polarization magnetoelectric dipole millimeter wave edge-emitting antenna and array thereof |
| CN112886246A (en) * | 2021-01-19 | 2021-06-01 | 南通大学 | Planar integrated microwave millimeter wave common-caliber edge-emitting antenna |
| CN113013626A (en) * | 2021-03-21 | 2021-06-22 | 南通大学 | Directional diagram reconfigurable end-fire antenna |
| CN113285229A (en) * | 2021-06-07 | 2021-08-20 | 南京邮电大学 | High-gain end-fire circularly polarized antenna based on artificial surface plasmon polariton |
| CN115051154A (en) * | 2022-07-27 | 2022-09-13 | 重庆邮电大学 | Differential broadband end-fire filtering antenna based on open stepped slot |
| CN218677564U (en) * | 2022-11-28 | 2023-03-21 | 天津光电通信技术有限公司 | Single-frequency band and dual-frequency band reconfigurable microstrip quasi-yagi antenna |
| CN116315654A (en) * | 2023-02-20 | 2023-06-23 | 中国移动通信集团云南有限公司 | 5G high-gain broadband antenna applied to indoor coverage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116780175A (en) | 2023-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Eldek | Design of double dipole antenna with enhanced usable bandwidth for wideband phased array applications | |
| US7605769B2 (en) | Multi-ban U-slot antenna | |
| Qu et al. | Ultrawideband composite cavity-backed folded sectorial bowtie antenna with stable pattern and high gain | |
| WO2003010854A1 (en) | Dual band planar high-frequency antenna | |
| Hu et al. | Electrically small, planar, complementary antenna with reconfigurable frequency | |
| EP2120293A1 (en) | Improved broadband multi-dipole antenna with frequency-independent radiation characteristics | |
| US20230075273A1 (en) | Magneto-electric dipole antenna | |
| JP2002524953A (en) | antenna | |
| US6977613B2 (en) | High performance dual-patch antenna with fast impedance matching holes | |
| CN111682312B (en) | Asymmetrically cut patch antenna along E plane | |
| Sun et al. | Research progress in Yagi antennas | |
| CN107799888B (en) | Dual-frequency high-gain patch antenna | |
| KR100729627B1 (en) | UWB antenna with uni -directional radiation pattern | |
| CN116780175B (en) | Broadband millimeter wave end-fire antenna | |
| CN215989232U (en) | Antenna and antenna array | |
| CN102340051A (en) | Double-V-type dual-frequency antenna | |
| CN212571346U (en) | Patch antenna asymmetrically cut along E-plane | |
| CN111600120B (en) | Compact low cross polarization microstrip antenna | |
| CN110635234A (en) | Antenna structure | |
| CN111224225B (en) | Compact double dipole driver and quasi-yagi antenna using same | |
| CN220492202U (en) | Broadband end-fire antenna applied to X frequency band | |
| CN216529352U (en) | Low-profile ultra-wideband antenna | |
| CN113410625B (en) | 3D arched ultra-wideband Vivaldi antenna and manufacturing method | |
| Guo et al. | Development of electrically small, bandwidth enhanced, vertically polarized filtennas | |
| CN112993551B (en) | Omnidirectional broadband WiFi antenna applied to 5G and 6G frequency bands |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |