CN113745815B - Cooperative combined antenna working in terahertz wave band - Google Patents
Cooperative combined antenna working in terahertz wave band Download PDFInfo
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- CN113745815B CN113745815B CN202110998574.2A CN202110998574A CN113745815B CN 113745815 B CN113745815 B CN 113745815B CN 202110998574 A CN202110998574 A CN 202110998574A CN 113745815 B CN113745815 B CN 113745815B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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Abstract
The invention discloses a cooperative combined antenna working in a terahertz waveband, which comprises a log-periodic antenna and a patch antenna, wherein the log-periodic antenna is connected with the patch antenna through a cable; the log periodic antenna comprises two antenna bodies which are rotationally symmetrical and are self-complementary sawtooth oscillators, a feed point is formed at the joint of the two sector antenna bodies, the patch antenna is connected with the feed point of the log periodic antenna through a lead, and the patch antenna applies excitation to the periodic antenna in a side feeding mode; the cooperative combined antenna designed in the invention utilizes a log periodic antenna as a source-drain antenna of a transistor detector, and adds a rectangular patch antenna corresponding to detection frequency at a grid. The two antennas act synergistically to introduce terahertz signals of a target frequency band into the channel, so that detection performance is enhanced. And the log periodic antenna can work in multiple frequency bands, so that the detection frequency spectrum of the detector can be widened.
Description
Technical Field
The invention relates to the technical field of terahertz antennas, in particular to a cooperative combined antenna working in a terahertz waveband.
Background
Terahertz waves are a section of electromagnetic waves between 0.1 and 10Thz, and are located between the microwave band and the infrared band. In recent years, with the continuous and deep research on terahertz waves, the terahertz waves are found to have a plurality of unique properties, and have very wide prospects in the fields of terahertz biology, medical research, explosive detection, 6G communication, security detection, nondestructive detection of parts and the like. In order to develop a terahertz wave technology, a terahertz source and a terahertz detector are two important difficulties.
In the case of terahertz detectors, an antenna is one of the crucial parts. Because the frequency of the terahertz wave band is high, and the signal energy is weak, usually, the electrode of the detector is difficult to be decoupled into the terahertz wave in the space, and therefore, the detection efficiency is generally low. In order to improve the detection efficiency of the detector, a well-designed terahertz coupling antenna is needed to help the detector capture terahertz waves in space and transmit the terahertz waves to a sensitive element of the detector.
In the related research of the conventional terahertz antenna, only one antenna structure is usually used, the antenna is also used as a gate-source electrode or a source-drain electrode of a high-electron-mobility transistor, and the like, but some antenna structures are complex in design and have high difficulty in preparation process. Some antennas have low coupling efficiency to terahertz waves, and the sensitivity of devices cannot be improved. Therefore, an antenna which has a simple structure, can work in multiple bands, has a simple preparation process, and has good coupling performance to terahertz waves is urgently needed to be found.
Disclosure of Invention
Aiming at the problems that the traditional antenna cannot work in multiple frequency bands, the antenna structure is complex and is difficult to prepare, and the gain is not high enough, the cooperative combined antenna working in the terahertz wave band is designed.
The invention is realized by the following technical scheme:
a cooperative combined antenna working in a terahertz waveband comprises a log-periodic antenna and a patch antenna;
the log periodic antenna comprises two antenna bodies which are rotationally symmetrical and are self-complementary sawtooth oscillators, a feed point is formed at the joint of the two sector antenna bodies, the patch antenna is connected with the feed point of the log periodic antenna through a lead, and the patch antenna applies excitation to the periodic antenna in a side feeding mode;
the antenna body includes that the body is presented in sectorial center, and the both sides that the body was presented in the center are provided with a plurality of antenna array respectively, and a plurality of antenna array are fan-shaped interval along the edge that the body was presented in the center and arrange to the antenna element of both sides is along radial dislocation set, and wherein the inward flange arc length of the antenna element of one side equals the outward flange arc length of another antenna element that the opposite side is adjacent along radial.
Preferably, the sector angle β of the antenna element ranges from 30 to 60 degrees; the opening angle alpha of the connected sector antenna array with different lengths ranges from 30 degrees to 60 degrees.
Preferably, the method for determining the scaling factor τ in the log periodic antenna is as follows:
wherein R isnThe radius of the excircle of the nth antenna element is shown; r isnIs the radius of the inner circle of the nth antenna element.
Preferably, the number of the antenna elements on each side of the central feed body is 3-6.
Preferably, the outer radius of the longest antenna element of the plurality of antenna elements is 200-.
Preferably, the patch antenna is connected with a feed point of the log periodic antenna through a microstrip line, and a feed area of the patch antenna coincides with a feed area of the log periodic antenna.
Preferably, the thickness of the log periodic antenna, the thickness of the patch antenna and the thickness of the microstrip line are all 100nm-1000 nm.
Preferably, the length L of the patch antenna is in the range of 200-.
Preferably, the multiple-period antenna and the patch antenna are arranged on a dielectric substrate, and a layer of gold is plated on the lower surface of the dielectric substrate.
Preferably, the dielectric substrate is a silicon wafer, gallium nitride, gallium aluminum nitride, silicon carbide or a flexible substrate.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a method for cooperative work of double antennas. When the traditional single antenna works in terahertz detection and is applied to terahertz detection, such as a butterfly wire, a dipole antenna and the like, the traditional single antenna is often directly used as a source drain electrode or a source gate electrode of a transistor detector. When the terahertz wave source-drain electrode is used as a source-drain electrode, the antenna can form a corresponding coupling electric field in a channel, but no corresponding terahertz signal is introduced on a grid electrode. If the antenna is used as a source and gate structure, the missing marks are only used as lead wires to lead out signals, and at the moment, the symmetry of the dipole is destroyed. The cooperative combined antenna designed in the invention utilizes a log periodic antenna as a source-drain antenna of a transistor detector, and adds a rectangular patch antenna corresponding to detection frequency at a grid. The two antennas act synergistically to introduce terahertz signals of a target frequency band into the channel, so that detection performance is enhanced. And the log periodic antenna can work in multiple frequency bands, so that the detection frequency spectrum of the detector can be widened.
Drawings
FIG. 1 is a schematic diagram of a log periodic antenna portion according to the present invention;
fig. 2 is a schematic diagram of a novel log periodic-patch cooperative antenna structure in the present invention;
fig. 3 is a return loss simulation diagram of the antenna.
In the figure, 1 is a sector opening angle beta of a central feed body of the log periodic antenna; 2 is the field angle alpha of the fan-shaped sawtooth oscillator; 3 is the longest antenna element with an outer radius of length R (6)1And an inner radius of length 7, denoted as r1(ii) a 4, metal testing electrodes on two sides of the log periodic antenna; 5 is a feeding point of the log periodic antenna; 8 is a central feed body; and 9 is an antenna element.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1 and 2, a cooperative antenna operating in the terahertz band includes a log periodic antenna and a patch antenna.
The log periodic antenna comprises two antenna bodies which are rotationally symmetrical and are self-complementary sawtooth oscillators, the circle centers of the two sector antenna bodies are connected to form a feed point 5, and the patch antenna is connected with the middle feed point of the log periodic antenna through a lead.
The antenna body includes that sectorial center is presented body 8, and the both sides that body 8 was presented in the center are provided with a plurality of antenna array 9 respectively, and a plurality of antenna array 9 are presented the edge of body along the center and are fan-shaped interval arrangement to the antenna element of both sides is along radial dislocation set, and wherein the inward flange arc length of the antenna element of one side equals the outward flange arc length of another antenna element that the opposite side is adjacent along radial.
The number of the antenna elements on each side of the antenna body is 3-6.
The range of the sector opening angle beta of the antenna element is 30-60 degrees; the field angle alpha of the connected sector antenna array with different lengths ranges from 30 degrees to 60 degrees, tau is a scale factor in a log periodic antenna and ranges from 1.5 to 2.5, and the calculation method is as follows
Wherein R isnThe radius of the excircle of the nth antenna element is shown; r isnThe radius of the inner circle of the nth antenna element.
The length R of the sector sawtooth oscillator of the log periodic antenna is different according to different target detection frequencies, and the preferred length R1The length is 200-1000 μm.
The patch antenna is connected with a feed point of the log periodic antenna through a microstrip line, the patch antenna applies excitation to the periodic antenna in a side feed mode, and a feed area of the patch antenna is overlapped with a feed area of the log periodic antenna.
The length L range of the patch antenna composed of the rectangular metal sheet is 200-1000 mu m, and the width W range of the patch antenna is 200-1000 mu m.
The fan-shaped edge of the antenna body is also provided with a metal sheet used as a test electrode, and the test electrode is connected with the log periodic antenna main body through a lead electrode. The antenna body and the metal sheet are made of gold or copper.
The test electrode has a size ranging from 100 gamma 100 μm to 200 gamma 200 μm; the length range of the lead electrode connected with the log periodic antenna is between 0 and 1000 mu m, and the line width is between 20 and 60 mu m;
the thickness of the log periodic antenna, the thickness of the patch antenna and the thickness of the microstrip line are all between 100nm and 1000 nm.
All log periodic antennas, patch antennas, test electrodes and leads have a thickness between 100nm and 1000 nm.
The multi-period antenna and the patch antenna are arranged on the dielectric substrate, the length and the width of the dielectric substrate need to be larger than the area of the antenna structure, and the thickness of the dielectric substrate is between 500-550 mu m; the dielectric substrate is a silicon wafer, gallium nitride, gallium aluminum nitride or silicon carbide, the dielectric constant of the dielectric substrate regulates the size range of the antenna, preferably a silicon/silicon wafer, the whole thickness is 500-550 mu m, the surface is provided with silicon dioxide with the thickness of about 250-300nm, the dielectric constant of the silicon dioxide is 3.9, and the dielectric constant of the silicon is 11.9. The lower surface of the medium substrate is plated with a layer of gold, and the thickness of the gold is 50nm-50 mu m.
Example 1
In this example, a silicon/silicon dioxide sheet with a thickness of 500 μm and silicon dioxide as the dielectric substrate of the antenna was usedThickness of 300nm, R of log periodic antenna1960 μm, 45 degrees for both beta and alpha, 800 μm for the length L, 980 μm for the width W, and 0.5 μm for the thickness of the rectangular patch antenna, which is specific to the 0.1THz band.
In this example, the spacing between the two elements of the log periodic antenna is 10 μm; the rectangular patch antenna and the center of the log periodic antenna are connected through microstrip lines with different thicknesses, and the two antennas work in a cooperative mode to jointly introduce signals into a feed area.
As shown in FIG. 3, the log periodic antenna model is constructed in the HFSS simulation software, and it can be seen from the simulation result that there are good absorption peaks in more bands within the range of 100-.
The invention provides a cooperative combined antenna working in a terahertz wave band, which adopts a method of cooperative work of double antennas, utilizes a log periodic antenna as a source-drain antenna of a transistor detector, and adds a rectangular patch antenna corresponding to detection frequency at a grid. The two antennas are cooperated to connect the log-periodic antenna integration with the source-drain electrode of the transistor, terahertz signals of a target frequency band are introduced into a channel, detection performance is enhanced, the log-periodic antenna can work in multiple frequency bands, and detection frequency spectrum of the detector can be widened.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A cooperative combined antenna working in a terahertz waveband is characterized by comprising a log-periodic antenna and a patch antenna;
the log periodic antenna comprises two antenna bodies which are rotationally symmetrical and are self-complementary sawtooth oscillators, a feed point (5) is formed at the joint of the two sector antenna bodies, the patch antenna is connected with the feed point of the log periodic antenna through a lead, and the patch antenna applies excitation to the periodic antenna in a side feed mode;
the antenna body includes that sectorial center is presented body (8), and the both sides that body (8) were presented in the center are provided with a plurality of antenna array (9) respectively, and a plurality of antenna array (9) are presented the edge of body along the center and are fan-shaped interval arrangement to the antenna element of both sides is along radial dislocation set, and wherein the internal flange arc length of the antenna element of one side equals the external flange arc length of another antenna element that the opposite side is adjacent along radial.
2. The cooperative antenna assembly as claimed in claim 1, wherein the antenna element has a sector angle β in the range of 30-60 degrees; the opening angle alpha of the connected sector antenna array with different lengths ranges from 30 degrees to 60 degrees.
3. The cooperative antenna assembly according to claim 2, wherein the scale factor τ in the log-periodic antenna is determined by:
wherein R isnThe radius of the excircle of the nth antenna element is shown; r isnIs the radius of the inner circle of the nth antenna element.
4. The cooperative antenna assembly as claimed in claim 1, wherein the number of antenna elements on each side of the central feed is 3-6.
5. The cooperative antenna assembly as recited in claim 1, wherein the longest of the plurality of antenna elements has an outer radius of 200-1000 μm.
6. The cooperative antenna assembly as recited in claim 1, wherein the patch antenna is connected to a feeding point of the log periodic antenna via a microstrip line, and a feeding area of the patch antenna coincides with a feeding area of the log periodic antenna.
7. The cooperative antenna assembly according to claim 6, wherein the log periodic antenna, the patch antenna, and the microstrip line are all 100nm to 1000nm thick.
8. The cooperative antenna assembly as claimed in claim 1, wherein the patch antenna has a length L in the range of 200-1000 μm and a width W in the range of 200-1000 μm.
9. The cooperative antenna assembly as claimed in claim 1, wherein the multiple-period antenna and the patch antenna are disposed on a dielectric substrate, and a layer of gold is plated on a lower surface of the dielectric substrate.
10. The cooperative antenna assembly as claimed in claim 9, wherein the dielectric substrate is a silicon wafer, gan-al, sic or flexible substrate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110998574.2A CN113745815B (en) | 2021-08-27 | 2021-08-27 | Cooperative combined antenna working in terahertz wave band |
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| CN202110998574.2A CN113745815B (en) | 2021-08-27 | 2021-08-27 | Cooperative combined antenna working in terahertz wave band |
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| JP4843611B2 (en) * | 2004-10-01 | 2011-12-21 | デ，ロシェモント，エル．，ピエール | Ceramic antenna module and manufacturing method thereof |
| US7327318B2 (en) * | 2006-02-28 | 2008-02-05 | Mti Wireless Edge, Ltd. | Ultra wide band flat antenna |
| DE102007062562B4 (en) * | 2007-12-22 | 2009-10-01 | Johann Wolfgang Goethe-Universität Frankfurt am Main | Monolithically integrated antenna and receiver circuit for the detection of terahertz waves |
| JP5563356B2 (en) * | 2010-04-12 | 2014-07-30 | キヤノン株式会社 | Electromagnetic wave detection element |
| JP6087520B2 (en) * | 2011-07-13 | 2017-03-01 | キヤノン株式会社 | Diode element and detection element |
| JP6095284B2 (en) * | 2012-06-27 | 2017-03-15 | キヤノン株式会社 | Schottky barrier diode and device using the same |
| CN103633448B (en) * | 2013-11-11 | 2016-01-20 | 北京理工大学 | Mate the Terahertz planar lens antenna of nearly zero refractive index Meta Materials |
| CN104916732A (en) * | 2014-03-12 | 2015-09-16 | 中国科学院苏州纳米技术与纳米仿生研究所 | Graphene terahertz wave detector and manufacturing method thereof |
| CN103872461A (en) * | 2014-03-14 | 2014-06-18 | 天津工业大学 | Si substrate field effect transistor terahertz detector antenna based on CMOS manufacturing process |
| WO2019074441A1 (en) * | 2017-10-12 | 2019-04-18 | Nanyang Technological University | Photodetector, method for forming the same, method for controlling the same and photodetector arrangement |
| CN109449588A (en) * | 2018-11-29 | 2019-03-08 | 上海交通大学 | A kind of adjustable micro-strip paster antenna of Terahertz frequency based on graphene load |
| CN110707422B (en) * | 2019-10-10 | 2021-02-26 | 深圳先进技术研究院 | Hyperbolic metamaterial planar antenna |
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