CN111969309A - Multi-frequency broadband antenna array, feeding device and antenna device - Google Patents
Multi-frequency broadband antenna array, feeding device and antenna device Download PDFInfo
- Publication number
- CN111969309A CN111969309A CN202010745095.5A CN202010745095A CN111969309A CN 111969309 A CN111969309 A CN 111969309A CN 202010745095 A CN202010745095 A CN 202010745095A CN 111969309 A CN111969309 A CN 111969309A
- Authority
- CN
- China
- Prior art keywords
- substrate
- array
- antenna
- array elements
- frequency broadband
- 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.)
- Pending
Links
Images
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
- 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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- 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
- H01Q13/10—Resonant slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
-
- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention relates to the field of antenna technologies, and in particular, to a multi-frequency broadband antenna array, a feeding device, and an antenna device. The multi-frequency broadband antenna array comprising: the array comprises two array elements, a substrate, a feeder line and a grounding patch; the array elements are single directional antennas formed by circular oscillators, the center distance between the two array elements is half wavelength, the two array elements are arranged on the front surface of the substrate, and the center parts of the circular oscillators are provided with rhombic gaps; the substrate is provided with a through hole, the feeder line is arranged on the back surface of the substrate, and the oscillator is connected with the feeder line through the through hole to form a current path; the ground patch is arranged on the back surface of the substrate. The antenna array realizes a multi-frequency broadband directional antenna, has high gain and wide scanning range, is hardly influenced by mutual coupling, generates no grating lobe in a radiation pattern, and effectively inhibits interference. And the whole antenna array is simple in design and low in cost.
Description
Technical Field
The present invention relates to the field of antenna technologies, and in particular, to a multi-frequency broadband antenna array, a feeding device, and an antenna device.
Background
In recent years, broadband technology has become an important development in the wireless field. Especially, after uwb (ultra wide band communication) standardization and civilization, explosive development of broadband communication is further promoted. Antennas and antenna arrays, which are core components of broadband communication systems, are also widely used in the fields of ultra-wideband wireless communication, high-precision positioning, radar detection, bioengineering, and the like.
The antenna array is used as a front-end component of a broadband communication system and has a crucial effect on the performance of the whole system. However, the existing broadband antenna array generally has the following problems:
1. the wideband antenna array usually determines the array element spacing by the upper limit frequency, the whole size of the antenna array is fixed, but the antenna array has small electrical size, reduced gain and small relative unit spacing for low frequency, which results in broadening of half-power beam width (HP); grating lobes may be generated at a high-frequency end, sidelobe levels are increased, and feeding difficulty is increased. Namely, the contradiction between the grating lobe and the unit size becomes a difficult point in the design of the ultra-wideband angle scanning antenna array.
2. The feeding difficulty is high, the implementation difficulty of a broadband feeding network is high, particularly when the number of array elements is increased, the antenna feeding structure is complex, the feeding efficiency is low, and the amplitude and the phase of the feeding network generate deviation.
3. Complex manufacturing, high cost, and difficulty in achieving integration or conformality in the structure.
Disclosure of Invention
Therefore, it is necessary to provide a multi-frequency broadband antenna array to solve the problems of the conventional antenna array that the feeding difficulty is difficult, the design is complicated due to the contradiction between grating lobes and the cell size, and the manufacturing cost is high. The specific technical scheme is as follows:
a multi-frequency broadband antenna array, comprising: the array comprises two array elements, a substrate, a feeder line and a grounding patch;
the array elements are single directional antennas formed by circular oscillators, the center distance between the two array elements is half wavelength, the two array elements are arranged on the front surface of the substrate, and the center parts of the circular oscillators are provided with rhombic gaps;
the substrate is provided with a through hole, the feeder line is arranged on the back surface of the substrate, and the oscillator is connected with the feeder line through the through hole to form a current path;
the ground patch is arranged on the back surface of the substrate.
Further, the feeder lengths of the two array elements are equal.
Further, the feeder line is a 50 ohm coplanar waveguide feeder line.
Further, the substrate is a substrate FR-4.
Further, the thickness of the substrate is 2 mm.
In order to solve the technical problem, a feeding device is also provided, and the specific technical scheme is as follows:
a power feeding apparatus comprising: a broadband matching network and an ultra wide band balun; the broadband matching network is connected with the ultra-wideband balun.
In order to solve the technical problem, an antenna device is also provided, and the specific technical scheme is as follows:
an antenna arrangement comprising the above-mentioned multi-frequency broadband antenna array and the above-mentioned feeding arrangement.
The invention has the beneficial effects that: a multi-frequency broadband antenna array comprises two array elements consisting of single directional antennas consisting of circular oscillators, wherein the circular oscillators with smooth and gradual change edges are favorable for current radiation, and the diameters of the circular oscillators are 1/4 wavelengths, so that the maximum radiation efficiency of the antenna can be achieved. And the center distance between the two array elements is half wavelength, if the distance between the array elements is less than 1/2 wavelength, the array elements can be influenced mutually, so that the input impedance of the array elements is changed, namely mutual coupling is generated, if the distance between the array elements is overlarge, the level of a side lobe is increased, and the performance of a main lobe is reduced, so that the center distance of the array elements is designed to be 1/2 wavelength, and the edge distance of the array elements is about 1/4 wavelength, namely, the mutual coupling influence between the array elements is reduced to the minimum on the premise of ensuring the maximum scanning angle. The central part of the circular oscillator is provided with a diamond-shaped gap, the single antenna with the gap generates a new resonance point at 4GHz in addition to the first resonance point at the original 6.5GHz, and the-10 dB bandwidth is about 200MHz, namely, the bandwidth is widened. The antenna array realizes a multi-frequency broadband directional antenna, has high gain and wide scanning range, is hardly influenced by mutual coupling, generates no grating lobe in a radiation pattern, and effectively inhibits interference. And the whole antenna array is simple in design and low in cost.
The feeder lengths of the two array elements are equal. And the time delays of the two paths of incident signals on the feeder lines are equal. The whole antenna has no grating lobe. And the feed line is a 50 ohm coplanar waveguide feed line. The coplanar waveguide feeder has the advantages of low offset characteristic of high frequency and wide impedance bandwidth.
The thickness of the substrate is 2mm, a plate FR-4 (the dielectric constant is 4.4) is selected, and the miniaturization and the bandwidth expansion of the antenna are facilitated due to the thicker thickness of the substrate and the higher dielectric constant.
Drawings
Fig. 1 is a schematic front view of a multi-frequency broadband antenna array according to an embodiment;
fig. 2 is a schematic diagram of an embodiment of a multi-frequency broadband antenna array;
fig. 3 is a schematic diagram of return loss of a single antenna before slotting in accordance with an embodiment;
FIG. 4 is a diagram illustrating return loss of a single antenna after the slot in accordance with an embodiment;
fig. 5 is an antenna array pattern according to an embodiment;
FIG. 6 is a graph illustrating coupling between elements according to an embodiment;
FIG. 7 is a schematic circuit diagram of a power feeding apparatus according to an embodiment;
FIG. 8 is a diagram illustrating a return loss curve of a single antenna after a frequency-broadening matching network according to an embodiment;
FIG. 9 is a diagram illustrating a multi-path signal according to an embodiment;
FIG. 10 is a schematic illustration of an AOA according to an embodiment;
fig. 11 is a diagram of complex baseband signals arriving at antennas a and B according to an embodiment.
Description of reference numerals:
1. the array elements are arranged in a matrix, and the array elements,
2. a substrate, a first electrode and a second electrode,
3. a through-hole is formed in the substrate,
4. a feeder line is arranged on the base plate,
5. a ground patch.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 to fig. 6, in the present embodiment, an embodiment of a multi-frequency broadband antenna array is as follows:
a multi-frequency broadband antenna array, comprising: the array comprises two array elements 1, a substrate 2, a feeder 4 and a ground patch 5;
the array element 1 is a single directional antenna formed by circular oscillators, the center distance between the two array elements 1 is half wavelength, the two array elements 1 are arranged on the front surface of the substrate 2, and the center part of each circular oscillator is provided with a diamond-shaped gap;
the substrate 2 is provided with a through hole 3, the feeder line 4 is arranged on the back surface of the substrate 2, and the oscillator is connected with the feeder line 4 through the through hole 3 to form a current path;
the ground patch 5 is disposed on the back surface of the substrate 2.
In this embodiment, the array element 1 is a single directional antenna composed of circular elements, the edge smooth gradient circular elements are beneficial to current radiation, and the diameter of the circular elements is 1/4 wavelengths, so that the antenna can achieve the maximum radiation efficiency. And the center distance between the two array elements 1 is half wavelength, if the distance between the array elements 1 is less than 1/2 wavelength, the array elements 1 will affect each other, so that the input impedance of the array elements 1 changes, i.e. mutual coupling is generated, if the distance between the array elements 1 is too large, the level of the side lobe will rise, and the performance of the main lobe will be reduced, so the center distance between the array elements 1 is designed to be 1/2 wavelength, the edge distance between the array elements 1 is about 1/4 wavelength, i.e. the mutual coupling effect between the array elements 1 is reduced to the minimum on the premise of ensuring the maximum scanning angle, and the mutual coupling between the array elements 1 in the frequency band range is less than-10 dB, as shown in fig. 6.
As shown in fig. 1, the central portion of the circular dipole is opened with a diamond-shaped slot, and as shown by the return loss before the slot is opened (as shown in fig. 3) and the return loss after the slot is opened (as shown in fig. 4), the single antenna after the slot is opened generates a new resonance point at 4GHz in addition to the first resonance point at the original 6.5GHz position (the-10 dB bandwidth is about 500MHz), and the-10 dB bandwidth is about 200MHz, i.e., the bandwidth is widened.
In this embodiment, the feeder lines 4 of the two array elements 1 are equal in length. So that the time delays of the two incident signals on the feeder 4 are equal. The whole antenna has no grating lobe and the gain is 3dB, as shown in figure 5. And the feed line 4 is a 50 ohm coplanar waveguide feed line. The coplanar waveguide feeder has the advantages of low offset characteristic of high frequency and wide impedance bandwidth.
The vibrator is connected with the feeder line 4 through the through hole 3 to form a current path. The whole antenna feed part forms a short circuit between the upper layer and the lower layer by opening holes on the upper surface and the lower surface of the grounding coplanar waveguide, thereby preventing the generation of parasitic modes, and the number of the holes can also change the input impedance of the antenna. Good matching can be achieved by adjusting the width of the feed line 4 and the slots on both sides of the feed line 4, which also makes it easy for the antenna to obtain impedance matching. The coplanar waveguide feeder is arranged on the back of the antenna.
The thickness of the substrate 2 is 2mm, a plate FR-4 (dielectric constant is 4.4) is selected, and the thickness and the high dielectric constant of the thicker substrate 2 are beneficial to the miniaturization and the bandwidth expansion of the antenna.
Referring to fig. 7 to 8, an embodiment of a power feeding device is as follows:
a power feeding apparatus comprising: a broadband matching network and an ultra wide band balun; the broadband matching network is connected with the ultra-wideband balun.
As shown in the circuit diagram of fig. 7, as can be seen from the return loss diagram (shown in fig. 8) of the single antenna after the frequency-widening matching network is widened, a resonance point is added at 8.7GHz (-10dB bandwidth is about 250MHz), the bandwidth is widened again, and 3 resonance points are formed in total, that is, a 3-bandwidth band antenna is formed, and the ultra-wideband balun converts the single-ended 50-ohm impedance of the antenna feeder into a 100-ohm impedance differential signal, thereby effectively suppressing the common-mode interference.
Referring to fig. 9 to 11, an embodiment of an antenna device is as follows:
an antenna arrangement comprising the above-mentioned multi-frequency broadband antenna array and the above-mentioned feeding arrangement.
In the ultra-wideband communication with the carrier frequency of 6.5GHz, the antenna device is used for accurately measuring the arrival angle of an incident signal. Selecting two signal paths with the strongest energy according to the energy of the received signal (as shown in fig. 9), and acquiring phase information of the two signal paths from the antenna (as shown in fig. 11), and reading the phase difference α of the two signals (as shown in fig. 10) in combination with the formula:
(1)p＝dsin(θ)
(2)α＝(2π/λ)/p＝fp/c
(3)arcsin(αλ/2πd)
and calculating the arrival angles of the two signals, wherein the angle error is 3-6 degrees.
The antenna device realizes a multi-frequency broadband directional antenna, has high gain and wide scanning range, is hardly influenced by mutual coupling, has no grating lobe in a radiation pattern, effectively inhibits interference, and can be widely applied to ultra-wideband positioning, high-speed wireless personal area networks and digital microwave relay communication.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (7)
1. A multi-frequency broadband antenna array, comprising: the array comprises two array elements, a substrate, a feeder line and a grounding patch;
the array elements are single directional antennas formed by circular oscillators, the center distance between the two array elements is half wavelength, the two array elements are arranged on the front surface of the substrate, and the center parts of the circular oscillators are provided with rhombic gaps;
the substrate is provided with a through hole, the feeder line is arranged on the back surface of the substrate, and the oscillator is connected with the feeder line through the through hole to form a current path;
the ground patch is arranged on the back surface of the substrate.
2. The multi-frequency broadband antenna array of claim 1,
the feeder lengths of the two array elements are equal.
3. The multi-frequency broadband antenna array of claim 1 or 2,
the feeder is a 50 ohm coplanar waveguide feeder.
4. The multi-frequency broadband antenna array of claim 1,
the substrate is a substrate FR-4.
5. The multi-frequency broadband antenna array of claim 1,
the thickness of the substrate is 2 mm.
6. A power feeding apparatus, characterized by comprising: a broadband matching network and an ultra wide band balun;
the broadband matching network is connected with the ultra-wideband balun.
7. An antenna arrangement, characterized in that the antenna arrangement comprises a multi-frequency broadband antenna array of claims 1 to 5 and a feeding arrangement of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010745095.5A CN111969309A (en) | 2020-07-29 | 2020-07-29 | Multi-frequency broadband antenna array, feeding device and antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010745095.5A CN111969309A (en) | 2020-07-29 | 2020-07-29 | Multi-frequency broadband antenna array, feeding device and antenna device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111969309A true CN111969309A (en) | 2020-11-20 |
Family
ID=73363507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010745095.5A Pending CN111969309A (en) | 2020-07-29 | 2020-07-29 | Multi-frequency broadband antenna array, feeding device and antenna device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111969309A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110071368A (en) * | 2009-12-21 | 2011-06-29 | (주)파트론 | Diversity antenna using wide-bandwidth patch antenna |
| CN103580645A (en) * | 2013-08-06 | 2014-02-12 | 南京理工大学 | 0/pi digital phase shifter based on ultra wide band balun |
| US20140104129A1 (en) * | 2011-06-29 | 2014-04-17 | Zte Corporation | Ultra-wideband antenna and terminal |
| CN105789858A (en) * | 2014-12-22 | 2016-07-20 | 哈尔滨飞羽科技有限公司 | New type monopole ultra wide band antenna with rhombus slot |
| CN206148603U (en) * | 2016-11-21 | 2017-05-03 | 嘉兴微感电子科技有限公司 | Dual -frenquency RFID label microstrip antenna |
| CN110797650A (en) * | 2019-11-09 | 2020-02-14 | 南京信息工程大学 | Circularly polarized antenna array with sequentially rotating feed network |
| US20200099122A1 (en) * | 2018-09-25 | 2020-03-26 | The Boeing Company | Electrically small antenna |
-
2020
- 2020-07-29 CN CN202010745095.5A patent/CN111969309A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110071368A (en) * | 2009-12-21 | 2011-06-29 | (주)파트론 | Diversity antenna using wide-bandwidth patch antenna |
| US20140104129A1 (en) * | 2011-06-29 | 2014-04-17 | Zte Corporation | Ultra-wideband antenna and terminal |
| CN103580645A (en) * | 2013-08-06 | 2014-02-12 | 南京理工大学 | 0/pi digital phase shifter based on ultra wide band balun |
| CN105789858A (en) * | 2014-12-22 | 2016-07-20 | 哈尔滨飞羽科技有限公司 | New type monopole ultra wide band antenna with rhombus slot |
| CN206148603U (en) * | 2016-11-21 | 2017-05-03 | 嘉兴微感电子科技有限公司 | Dual -frenquency RFID label microstrip antenna |
| US20200099122A1 (en) * | 2018-09-25 | 2020-03-26 | The Boeing Company | Electrically small antenna |
| CN110797650A (en) * | 2019-11-09 | 2020-02-14 | 南京信息工程大学 | Circularly polarized antenna array with sequentially rotating feed network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6292153B1 (en) | Antenna comprising two wideband notch regions on one coplanar substrate | |
| US6246377B1 (en) | Antenna comprising two separate wideband notch regions on one coplanar substrate | |
| US7589686B2 (en) | Small ultra wideband antenna having unidirectional radiation pattern | |
| US9142889B2 (en) | Compact tapered slot antenna | |
| CN110224219B (en) | Circularly polarized substrate integrated cavity antenna | |
| CN110380218B (en) | Circular polarization plane substrate integrated magnetoelectric dipole antenna and array thereof | |
| CN111180886A (en) | Miniaturized broadband dual-polarization magnetoelectric dipole millimeter wave edge-emitting antenna and array thereof | |
| CN106299618B (en) | A kind of substrate integration wave-guide plane end-fire circular polarized antenna | |
| CN110112560B (en) | Millimeter wave broadband wide-angle circularly polarized antenna applied to beam scanning | |
| KR20050107881A (en) | Multiple meander strip monopole antenna with broadband characteristic | |
| CN108736153B (en) | Three-frequency low-profile patch antenna | |
| KR101630674B1 (en) | Double dipole quasi-yagi antenna using stepped slotline structure | |
| CN109888485A (en) | A kind of compact low section multi-beam microstrip antenna | |
| CN110112549B (en) | Differential feed three-frequency dual-polarized antenna | |
| CN213845512U (en) | Broadband circularly polarized antenna based on artificial magnetic conductor | |
| CN114336024A (en) | Broadband circularly polarized planar antenna array applied to millimeter wave communication system | |
| CN116247428B (en) | Millimeter wave array antenna | |
| Karthikeya et al. | CPW fed conformal folded dipole with pattern diversity for 5G mobile terminals | |
| CN110534882B (en) | Double-frequency antenna | |
| CN115173068B (en) | Broadband circularly polarized substrate integrated waveguide horn antenna array and wireless communication equipment | |
| Chen et al. | Broadband microstrip-fed modified quasi-Yagi antenna | |
| CN114583455B (en) | Ultra-wideband circularly polarized super-surface patch antenna based on spiral feed structure | |
| CN115939782A (en) | W-band rotary type circularly polarized magnetoelectric dipole antenna array | |
| CN111969309A (en) | Multi-frequency broadband antenna array, feeding device and antenna device | |
| KR100449857B1 (en) | Wideband Printed Dipole Antenna |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201120 |
|
| RJ01 | Rejection of invention patent application after publication |