CN111786116B - Micro-fluid frequency reconfigurable quasi-yagi antenna based on dielectric resonator - Google Patents
Micro-fluid frequency reconfigurable quasi-yagi antenna based on dielectric resonator Download PDFInfo
- Publication number
- CN111786116B CN111786116B CN202010807109.1A CN202010807109A CN111786116B CN 111786116 B CN111786116 B CN 111786116B CN 202010807109 A CN202010807109 A CN 202010807109A CN 111786116 B CN111786116 B CN 111786116B
- Authority
- CN
- China
- Prior art keywords
- dielectric resonator
- antenna
- frequency
- driving unit
- quasi
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
-
- 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
- H01Q1/36—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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/206—Microstrip transmission line antennas
-
- 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
- H01Q9/0485—Dielectric resonator antennas
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention relates to a micro-fluid frequency reconfigurable quasi-yagi antenna based on a dielectric resonator, which comprises: the antenna comprises a dielectric substrate, a reflector, a driving unit, a differential feed network and at least one pair of insulating tubes which are symmetrically arranged based on the central line of the antenna and vertically penetrate through the driving unit and the dielectric substrate, wherein the working frequency of the antenna is adjusted by injecting liquid into the insulating tubes, the liquid injection states of the symmetrical insulating tubes are consistent, and the liquid injection states comprise two types: filled with liquid and not filled with liquid. The invention firstly provides a method for working at high-order TE δ31 The frequency of the mode dielectric resonator can reconstruct the quasi-yagi antenna. According to TE δ31 And in the mode electric field distribution, the position with a stronger electric field is selected as the position of four air holes penetrating through the dielectric resonator to load the insulating tube, so that a larger frequency tuning range is obtained. The working frequency of the antenna can be effectively adjusted by injecting purified water into the symmetrical insulating tubes in sequence.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a micro-fluid frequency reconfigurable quasi-yagi antenna based on a dielectric resonator.
Background
As a key device for implementing signal transmission and reception, a frequency reconfigurable antenna plays an important role in a high-performance multi-radio frequency communication platform, and has received extensive attention from researchers. To date, various methods of frequency tuning have been developed, including electrical tuning and mechanical tuning. The former is mainly realized by semiconductor diodes or electrical switches, and the tuning mechanism has high robustness in operation and technical maturity. However, they also suffer from a number of disadvantages, such as low radiation efficiency (due to losses in parasitic resistance of the diodes) and low power capacity (due to electrical breakdown of the diodes and switches). To solve this problem, in recent years, mechanical tuning using liquid metals or microfluidics has been a good choice. Among them, pure water is popular because of its low price and easy availability. The usage can be divided into two categories: one is that pure water placed in a container is directly used as a dielectric resonator as a radiator; another is to change the effective dielectric constant of the antenna by sequentially injecting purified water into the tube under the patch.
The quasi-yagi antenna is a typical end-fire antenna, and has the advantages of simple structure, light weight, strong directivity, easy array formation and the like. The driver is usually designed with half-wavelength electric dipoles, which inevitably leads to ohmic losses. And as the operating frequency increases, this problem becomes more severe. To solve this problem, a dielectric resonator with a surface current close to zero is more suitable for high frequency applications. In the article 'X-band magnetic dipole quasi-yagi antenna based on dielectric resonator', a quasi-yagi antenna working at TE is involved δ11 A dielectric resonator quasi-yagi antenna under a fundamental mode. The quasi-yagi electric dipole antenna has higher gain than a traditional quasi-yagi electric dipole antenna, has high efficiency of more than 90% in an X wave band, but adopts fixed working frequency and is not adjustable.
Disclosure of Invention
The invention aims to: the defects of the prior art are overcome, and the micro-fluid frequency reconfigurable quasi-yagi antenna based on the dielectric resonator is provided, and the working frequency of the micro-fluid frequency reconfigurable quasi-yagi antenna is adjustable.
In order to achieve the above object, the present invention provides a microfluidic frequency reconfigurable quasi-yagi antenna based on a dielectric resonator, including: the feed circuit comprises a dielectric substrate, a reflector, a driving unit and a differential feed network for directly feeding the driving unit, wherein the driving unit is a rectangular dielectric resonator, and the feed circuit is characterized in that: the antenna comprises at least one pair of insulating tubes which are symmetrically arranged based on the center line of a dielectric resonator and vertically penetrate through a driving unit and a dielectric substrate, wherein the insulating tubes are filled with liquid to adjust the working frequency of the antenna, the filling states of the symmetrical insulating tubes are consistent, and the filling states comprise two types: filled with liquid and not filled with liquid.
Furthermore, the reconfigurable quasi-yagi antenna is provided with four insulation tubes, wherein the insulation tubes are arranged on the dielectric resonator TE along the x-axis direction δ31 The mode electric field is stronger to obtain a larger frequency tuning range.
The invention firstly provides a method for working at high-order TE δ31 The frequency of the mode dielectric resonator can reconstruct the quasi-yagi antenna. According to TE δ31 The electric field distribution of the mode reasonably selects the positions of four air holes penetrating through the dielectric resonator to load the tube. By sequentially injecting purified water into the tubes, the operating frequency of the antenna can be effectively adjusted. In order to verify the method, an X-band antenna example is designed, and the simulation result is well matched with the test result. The results show that higher order TEs are used in the frequency tuning range δ31 Mode, the antenna without the additional director still has higher gain (more than 8.7 dBi) while maintaining the high radiation efficiency characteristic of the dielectric resonator antenna.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a perspective view of a microfluidic frequency-reconfigurable quasi-yagi antenna based on a dielectric resonator.
Fig. 2 is a schematic diagram of a micro-fluidic frequency-reconfigurable quasi-yagi antenna structure based on a dielectric resonator.
FIG. 3-a shows a pair of insulation tubes in different positions, TE δ31 The frequency of the pattern versus b trend graph.
FIG. 3-b shows a pair of insulation tubes in different positions, TE δ31 The frequency of the pattern versus the trend of w.
FIG. 4 is an embodiment of the present inventionExample antenna simulation (solid line) and test (dotted line) | S 11 The | graph.
Fig. 5-a is an E-plane pattern for simulation (solid line) and test (dashed line) of an antenna of an embodiment of the present invention in a "0000" state (full insulator tube empty).
Fig. 5-b is an H-plane pattern for simulation (solid line) and test (dashed line) of an antenna of an embodiment of the present invention in the "0000" state (full insulator tube empty).
Fig. 5-c is an E-plane pattern for simulation (solid line) and testing (dashed line) of an antenna of an embodiment of the present invention in a "1111" state (full water injection into the insulator).
Fig. 5-d is an H-plane pattern for simulation (solid line) and test (dashed line) of an antenna of an embodiment of the present invention in the "1111" state (full water injection in the insulator).
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
For a more clear understanding of the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, the microfluidic frequency reconfigurable quasi-yagi antenna based on the dielectric resonator is shown in the embodiment of the invention. The antenna of the embodiment of the invention comprises: the device comprises a dielectric substrate 1, a reflector 2, a driving unit 6 and a differential feed network for directly feeding the driving unit 6. The driving unit 6 is arranged on the top layer of the dielectric substrate 1 and performs differential feeding through a differential feeding network. In order to realize coplanar strip line feed, a pair of equal-amplitude and opposite-phase radio frequency signals are respectively transmitted along two metal microstrip lines (a differential feed network which is formed by a pair of feed strip lines transiting from a differential microstrip line 4 to a coplanar strip line 3). Due to coplanar stripline and TE δ31 The electric field distribution directions of the modes are consistent, so that high-order TE can be well excited δ31 Mode(s). The front end of the coplanar strip line 3 is embedded below the driving unit 6 by adjusting the width of the coplanar strip line 3w 2 Exposed length of coplanar strip 3l 2 And the length of the coplanar strip line 3 embedded under the driving unit 6l 3 Better impedance matching can be obtained. At the same time, the ground of the differential microstrip line 4 printed on the bottom of the substrate serves as a reflector 2 to achieve end-fire radiation.
As shown in the figure, the antenna of this embodiment has two pairs (four) of insulating tubes 5 (teflon tubes) which are symmetrically arranged based on the center line of the antenna and vertically penetrate through the driving unit 6 and the dielectric substrate 1, and the operating frequency of the antenna is adjusted by injecting purified water (or other liquid) into the insulating tubes 5, wherein the injection states of the symmetrical insulating tubes 5 are consistent, and the injection states include two types: filled with liquid and not filled with liquid.
TE of rectangular dielectric resonator δ31 The electric field of the mode is tangential to the x-z plane. By operating at higher levels of TE δ31 The dielectric resonator in the mode is used as a magnetic dipole driver, and higher gain can be obtained. Because the pure water is a high dielectric constant material (ε wr 81) it can be used to partially change the effective dielectric constant of the dielectric resonator. Meanwhile, the effective dielectric constant has a direct relationship with the electric field of the corresponding mode. Therefore, by disposing four insulating tubes 5 at intervals in the x-axis direction in a region where the electric field is strong, a large frequency tuning range can be obtained.
To facilitate the study of how the position of the insulating tube controls the frequency tuning range, a pair of tubes was used for experimental analysis as shown in fig. 3 a. First, the center lines of the two insulating tubes in the x-axis direction are gradually separated (w= 0), by distance 2bTo indicate. FIG. 3a depicts TE δ31 Frequency of mode relative tob(distance from center of insulating tube to vertical center line of dielectric resonator) in whichf w/o Andf w respectively indicating that the dielectric resonator is in TE when there is no water or water in the tube δ31 The frequency of the mode(s),Δf= f w/o - f w representing the frequency tuning range between these two states.bWhen the thickness is increased from 1.2mm,Δfwith followingbIs increased and approximately atbWhen = 3.3mmΔfReaches a maximum value and then isbAbout 8.4mm reaches the nextA peak value. Secondly, inbIn the case of = 3.3mm, the two tubes are gradually moved from the lower edge to the upper edge of the dielectric resonator, i.e., from the lower edge to the upper edge of the dielectric resonatorw= 3.8mm tow= 3.8mm. FIG. 3b depicts TE δ31 Frequency of mode relative tow(distance from the center of the insulating tube to the transverse center line of the dielectric resonator),wwhen the value is not less than 0, the reaction time is not less than 0,Δfhas a maximum value, and followswIncrease of absolute valueΔfGradually decreases. As can be seen,Δfand the dielectric resonator is in TE δ31 The distribution of the electric field strength in the mode is consistent.
In order to verify the proposed concept, the quasi-yagi antenna using the dielectric resonator as shown in fig. 1 and fig. 2 is designed and implemented, in the present embodiment, the driving unit 6 is a rectangular dielectric resonator, and the relative dielectric constant isε r = 45, thicknessh= 1.2mm, loss tangent tanδ= 0.00019, the dielectric substrate 1 is a Rogers RO4003 type plate with a relative dielectric constant ofε r Thickness of = 3.55t= 0.508 mm and loss tangent tanδ= 0.0027. The dimensions in fig. 1, 2 are as follows:sw=58mm, sl=56.4mm, dl=20mm, dw=7.6mm, b 1 =3.3mm, b 2 =8.4mm, d 1 =2mm, d 2 =1.5mm, g=0.8mm, l 1 =20mm, l 2 =8.8mm, l 3 =2.2mm, w 1 =1.2mm, w 2 =1.5mm，hw=10mm. The distance from the top surface of the insulating tube to the top surface of the dielectric resonator is 3.8mm, and the distance from the first surface of the insulating tube to the top surface of the dielectric resonator to the lower surface of the dielectric substrate 1 is 4.492mm. It is recommended that the height of the insulating tube exposed out of the dielectric resonator is not less than 3mm, and the height of the insulating tube exposed out of the lower surface of the dielectric substrate 1 is not less than 3mm. The water filling state of the insulating pipe is represented by 1 and 0, the water filling of the insulating pipe is described by 1, and the water filling of the insulating pipe is described by 0. Therefore, the proposed frequency reconfigurable antenna has four symmetric states, "0000", "1001", "0110", and "1111".
FIG. 4 shows the reflection coefficient | S for the above four state simulation and test 11 |。By sequentially injecting purified water into the tube, the center frequency of the antenna can be tuned from 8.99 to 8.695GHz, with the test results shown in table 1.
TABLE 1
| State of |
0000 | 1001 | 0110 | 1111 |
| Center frequencyf 0 (GHz) | 8.990 | 8.850 | 8.825 | 8.695 |
| Bandwidth (MHz) | 270 | 270 | 270 | 270 |
| Gain (dBi) | 8.70 | 8.77 | 8.75 | 8.71 |
| Radiation efficiency (%) | 90.25 | 92.79 | 93.02 | 94.26 |
From the test results, the measured bandwidth (| S) 11 | <10 dB), gain and radiation efficiency are all approximately constant values within the frequency tuning range. It is worth noting that the antenna radiation efficiency can reach more than 90% due to the use of the dielectric resonator as the driver and the micro-fluid tuning technology, and meanwhile, the high-order TE is adopted δ31 Mode, high gain (greater than 8.7 dBi) for the antenna.
Fig. 5-a to 5-d show E-plane and H-plane radiation patterns corresponding to two states ("0000" and "1111") of 8.99GHz and 8.695GHz, respectively. In the figure, the curve close to the center corresponds to cross polarization, the curve close to the outer ring corresponds to main polarization, wherein the solid line is a simulation result, and the dotted line is a test result. The result shows that the tested E-plane and H-plane radiation patterns are stable in the end-fire direction and well matched with the simulation result. Cross polarization below-20 dB and front-to-back ratio better than 10dB can be observed in the ± 30 ° beam range.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (8)
1. A microfluidic frequency reconfigurable quasi-yagi antenna based on a dielectric resonator comprises: reflector (2), dielectric substrate (1), drive unit (6) that superpose from bottom to top in proper order to and set up in dielectric substrate (1) upper surface and carry out the difference feed network that directly feeds back to drive unit (6), drive unit (6) are rectangle dielectric resonator, its characterized in that: the antenna comprises at least one pair of insulating tubes (5) which are symmetrically arranged based on the center line of a dielectric resonator and vertically penetrate through a driving unit (6) and a dielectric substrate (1), and the operating frequency of the antenna is adjusted by injecting liquid into the insulating tubes (5), wherein the liquid injection states of the symmetrical insulating tubes (5) are consistent, and the liquid injection states comprise two types: filled with liquid and not filled with liquid.
2. The dielectric resonator-based microfluidic frequency reconfigurable quasi-yagi antenna of claim 1, wherein: the insulating tube (5) is a Teflon tube, and injected liquid is purified water.
3. The dielectric resonator-based microfluidic frequency reconfigurable quasi-yagi antenna of claim 1, wherein: four insulating tubes (5) are arranged, and the four insulating tubes (5) are arranged at intervals in the x-axis direction on the dielectric resonator TE δ31 The mode electric field is stronger, so that a larger frequency tuning range is obtained.
4. The dielectric resonator-based microfluidic frequency reconfigurable quasi-yagi antenna of claim 1, wherein: the differential feed network is a pair of feed microstrip lines which are transited from the differential microstrip line (4) to the coplanar strip line (3), the drive unit (6) is directly fed with excitation, and the ground of the differential microstrip line (4) is used as a reflector (2).
5. The dielectric resonator-based microfluidic frequency reconfigurable quasi-yagi antenna of claim 4, wherein: the front end of the coplanar strip line (3) is embedded under the driving unit (6), and the width of the coplanar strip line (3) is adjustedw 2 Exposed length of coplanar strip line (3)l 2 And the length of the coplanar strip line (3) embedded below the driving unit (6)l 3 And realizing impedance matching.
6. The dielectric resonator-based microfluidic frequency reconfigurable quasi-yagi antenna of claim 1, wherein: the dielectric substrate (1) is a printed circuit board, the reflector (2) is printed on the lower surface of the printed circuit board, and the differential feed network for feeding is printed on the upper surface of the printed circuit board.
7. The dielectric resonator-based microfluidic frequency reconfigurable quasi-yagi antenna of claim 1, wherein: the differential feed network comprises two feed microstrip lines which are arranged in parallel, each feed microstrip line comprises a differential microstrip line (4) arranged right above the reflector (2) and a coplanar strip line (3) arranged between the driving unit (6) and the differential microstrip line (4), the end part of the coplanar strip line (3) extends into the space between the driving unit (6) and the dielectric substrate (1) to realize direct feed of the driving unit (6), and the differential microstrip line (4) and the coplanar strip line (3) are symmetrically arranged along the central line of the driving unit (6).
8. The dielectric resonator-based microfluidic frequency reconfigurable quasi-yagi antenna of claim 1, wherein: the distance from the top surface of the insulating tube (5) to the upper surface of the driving unit (6) is not less than 3mm; the distance from the bottom surface of the insulating tube (5) to the dielectric substrate (1) is not less than 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807109.1A CN111786116B (en) | 2020-08-12 | 2020-08-12 | Micro-fluid frequency reconfigurable quasi-yagi antenna based on dielectric resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807109.1A CN111786116B (en) | 2020-08-12 | 2020-08-12 | Micro-fluid frequency reconfigurable quasi-yagi antenna based on dielectric resonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111786116A CN111786116A (en) | 2020-10-16 |
| CN111786116B true CN111786116B (en) | 2022-10-28 |
Family
ID=72762064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010807109.1A Active CN111786116B (en) | 2020-08-12 | 2020-08-12 | Micro-fluid frequency reconfigurable quasi-yagi antenna based on dielectric resonator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111786116B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116315620B (en) * | 2023-05-22 | 2023-07-21 | 湖南大学 | Multi-parameter reconfigurable liquid antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002049154A1 (en) * | 2000-12-15 | 2002-06-20 | Antenova Limited | Tuneable fluid-filled dielectric resonator antennas |
| CN109390668A (en) * | 2018-09-19 | 2019-02-26 | 南京航空航天大学 | A kind of frequency reconfigurable liquid medium resonant antenna |
| CN110729569A (en) * | 2019-10-25 | 2020-01-24 | 南通大学 | High-gain yagi antenna based on high-order mode and metamaterial of dielectric resonator |
| CN110854521A (en) * | 2019-11-27 | 2020-02-28 | 南通大学 | Annular dielectric resonator broadband quasi-yagi antenna based on metal ring loading |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7619564B2 (en) * | 2006-08-23 | 2009-11-17 | National Taiwan University | Wideband dielectric resonator monopole antenna |
-
2020
- 2020-08-12 CN CN202010807109.1A patent/CN111786116B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002049154A1 (en) * | 2000-12-15 | 2002-06-20 | Antenova Limited | Tuneable fluid-filled dielectric resonator antennas |
| CN109390668A (en) * | 2018-09-19 | 2019-02-26 | 南京航空航天大学 | A kind of frequency reconfigurable liquid medium resonant antenna |
| CN110729569A (en) * | 2019-10-25 | 2020-01-24 | 南通大学 | High-gain yagi antenna based on high-order mode and metamaterial of dielectric resonator |
| CN110854521A (en) * | 2019-11-27 | 2020-02-28 | 南通大学 | Annular dielectric resonator broadband quasi-yagi antenna based on metal ring loading |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111786116A (en) | 2020-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gao et al. | Dual-polarized broad-band microstrip antennas fed by proximity coupling | |
| Gao et al. | Dual-polarized slot-coupled planar antenna with wide bandwidth | |
| US7636063B2 (en) | Compact broadband patch antenna | |
| CN108717992A (en) | The Dual-polarized electricity magnetic-dipole antenna of millimeter wave differential feed | |
| CN1941506B (en) | Double-layer wideband rectangular microband paste antenna with non-radiant edged feeder | |
| CN108400439B (en) | W-shaped terminal dual-band dual-polarized planar slot antenna | |
| Yadav | L-slotted rectangular microstrip patch antenna | |
| Park et al. | Aperture-coupled small microstrip antenna | |
| US6795023B2 (en) | Broadband suspended plate antenna with multi-point feed | |
| Xie et al. | A wideband dual-polarized aperture-coupled antenna embedded in a small metal cavity | |
| CN113594701A (en) | Wide-frequency-band wide-beam dual-polarized antenna based on metal cavity and parasitic dipole | |
| CN111786116B (en) | Micro-fluid frequency reconfigurable quasi-yagi antenna based on dielectric resonator | |
| CN110098471B (en) | Broadband dual-polarized base station antenna based on hybrid balun | |
| Rao et al. | A hybrid resonator antenna suitable for wireless communication applications at 1.9 and 2.45 GHz | |
| CN111326856B (en) | Ultra-low profile end-fire vertical polarization antenna based on quasi-PIFA antenna | |
| Azim et al. | Ground defected planar super-wideband antenna: A suitable transceiver for short distance wireless communication | |
| Bancroft | Design parameters of an omnidirectional planar microstrip antenna | |
| Yunita et al. | Inset-fed triangular antenna array with switchable circular polarization | |
| Behera | Dual band and dual polarized microstrip patch antenna | |
| Lafond et al. | Thick slot‐coupled printed antenna arrays for a 60 GHz indoor communication system | |
| Gao et al. | Broadband dual‐polarized proximity coupled circular patch antenna | |
| Zhang et al. | Wide band antenna array using bowtie-shaped microstrip patch antenna | |
| CN114709610B (en) | Broadband dual-polarized tightly-coupled antenna unit and array | |
| Chen et al. | A Series-Fed Horizontally-Polarized Patch Antenna Array | |
| Asal et al. | Substrate Integrated Waveguide Based Magneto-Electric Antenna for 5G |
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 |