CN201383548Y - Microwave and millimeter wave antennas for cars and indoor communications - Google Patents
Microwave and millimeter wave antennas for cars and indoor communications Download PDFInfo
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- CN201383548Y CN201383548Y CN200920039530U CN200920039530U CN201383548Y CN 201383548 Y CN201383548 Y CN 201383548Y CN 200920039530 U CN200920039530 U CN 200920039530U CN 200920039530 U CN200920039530 U CN 200920039530U CN 201383548 Y CN201383548 Y CN 201383548Y
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Abstract
The utility model provides a microwave and millimeter wave antennas for cars and indoor communications, which adopts the double-side single-layer PCB technology; the sealing of electromagnetic wave is achieved by utilizing an upper metal surface, a lower metal surface and a metallized through-hole array on one side; an effective leaky-wave radiation is realized on the opened surface; by adopting a half mode substrate integrated waveguide (HMSIW) (9) with decreased width and at the leaky-wave part, the effective leaky-wave radiation of the leaky-wave antenna of HMSIW is achieved; the bottom layer of an dielectric substrate (1) of the antenna completely covers the lower metal surface (4), the top layer thereof completely covers the upper metal surface (2), and the metallized through-holes on one side of the HMSIW with normal width (7), the HMSIW with gradual width change (8), and the HMSIW at the leaky-wave part (9) are connected with the upper and lower metal layers; and for facilitating the test, the input end and output end of the antennas adopt micro-strips of 50 ohm.
Description
Technical field
The utility model is a kind of novel leaky-wave antenna, can be applied to microwave and millimeter wave auto communication or indoor communications and use.Designed half-module substrate integrated waveguide leaky-wave antenna belongs to the field that microwave antenna is made.
Background technology
Leaky-wave antenna is the important travelling-wave-type antenna of a class.At millimeter wave frequency band, based on the printing leaky-wave antenna of little band or co-planar waveguide because there are problems such as bigger and surperficial mode of loss or spurious mode in the opening of self structure.This plane of emerging substrate integration wave-guide is guided wave structure formed to be enclosed in inside with electromagnetic wave, thereby can be effectively applied to millimeter wave frequency band, has easy processing, low cost, low-loss, easily and advantage such as other planar circuit is integrated.Half module substrate integrated wave guide can be under the prerequisite that keeps original substrate integration wave-guide performance, and reduction is the area of half closely.
The present invention proposes novel leaky-wave antenna based on half module substrate integrated wave guide.This leaky-wave antenna has accurate omnidirectional (taper shape) antenna pattern, is applicable to the millimeter wave frequency band application that comprises auto communication and indoor wireless communication.Half-module substrate integrated waveguide leaky-wave antenna has certain characteristics and advantage, and is low such as loss, and bandwidth is wide, compact conformation, be easy to processing, be easy to and advantages such as planar circuit is integrated, has very high practical value.
Summary of the invention
Technical problem: the purpose of this utility model is to propose a kind of microwave and millimeter wave automobile and indoor communications antenna.This antenna has structurally adopted the half module substrate integrated wave guide that reduces width as leaky-wave antenna, has characteristics such as volume is little, compact conformation.Adopt the structure of single-layer medium, made and adopt common two-sided PCB technology to get final product this leaky-wave antenna of processing and fabricating, be convenient to large-scale production.By choosing suitable dielectric substrate thickness, adopt the leaky-wave antenna of half module substrate integrated wave guide design to have accurate omni-directional pattern, be applicable to microwave and millimeter wave auto communication and indoor communications.
Technical scheme: the half module substrate integrated wave guide of the leaky wave part that microwave and millimeter wave automobile of the present utility model and indoor communications antenna employing width reduce is to realize effective leaky wave radiation; This antenna is metal covering under the bottom of dielectric substrate covers fully, top layer cover to be gone up metal covering, and the plated-through hole of half module substrate integrated wave guide one side that is positioned at half module substrate integrated wave guide, the leaky wave part of half module substrate integrated wave guide, the width gradual change of normal width connects upper and lower metal level; Be convenient test, input/output terminal is 50 ohm microstrip.
Be operated in the half-module substrate integrated waveguide leaky-wave antenna of 28GHz, adopting through-hole diameter is the plated-through hole 3 of 0.4mm, the through-hole spacing of 0.8mm, the dielectric material that 0.508mm is thick.
Microwave and millimeter wave automobile of the present invention and indoor communications antenna put forward according to the half module substrate integrated wave guide structure, can adopt individual layer double-sided printed-circuit board (PCB) technology to realize.Half module substrate integrated wave guide is on dielectric substrate, forms the compact plated-through hole of a row, and when through-hole spacing was enough little, electromagnetic wave was very little from the energy of revealing between through hole, can ignore.This exhausting hole can be used as the sidewall of waveguide so.The dielectric substrate upper and lower surface covers the wide wall of metal level as waveguide.The opening surface of half module substrate integrated wave guide, process reduces suitable designs such as the ratio of width to height, can realize effective leaky wave radiation.
Be respectively equipped with input and output at the two ends of half module substrate integrated wave guide, adopt little tape relay mode.Suitably reduce the width of half module substrate integrated wave guide, the radiance of antenna is enhanced.Yet the return loss of antenna is poor, and this mainly is owing to reduce the half module substrate integrated wave guide of width and little band and do not match and cause.Because the half module substrate integrated wave guide width after reducing is less, directly coupling is difficult.For improving coupling, adopt the half module substrate integrated wave guide of certain-length, form the width gradual change transition.The leaky-wave antenna terminal connects matched load to absorb a small amount of dump energy.The leaky wave partial-length is big more, and then radiation efficiency is high more and wave beam is narrow more.In actual design, need between desired antenna electric performance index and acceptable antenna size, compromise.In addition, remove the efficient that certain medium and metal ground help aerial radiation equally.Need to guarantee a day line width, make it have certain mechanical strength.
Beneficial effect: the microwave and millimeter wave automobile and the indoor communications antenna of utility model have following advantage:
1 :) half module substrate integrated wave guide can be under the prerequisite that keeps original substrate integration wave-guide performance, and reduction is the area of half closely.And half-module substrate integrated waveguide leaky-wave antenna has further compressed the area of antenna owing to reduced the ratio of width to height, has very compact structure, is beneficial to the height of other planar circuit integrated.
2 :) this half-module substrate integrated waveguide leaky-wave antenna is that to connect the novel planar that the double-level-metal surface forms by plated-through hole on a single-layer medium substrate guided wave structure formed.Correspondence only is lamina technology inside PCB technology, and with respect to multi-layer PCB, low cost of manufacture is convenient to large-scale production simultaneously.
3 :) this half-module substrate integrated waveguide leaky-wave antenna has lower loss.This be since this leaky-wave antenna based on the good characteristic that had of half module substrate integrated wave guide structure, so compare with microstrip circuit, its Q value is than higher, loss ratio is lower.
4 :) this half-module substrate integrated waveguide leaky-wave antenna has accurate omnidirectional radiation characteristic, helps consistent reception of signal of automobile or portable terminal.Therefore, this half-module substrate integrated waveguide leaky-wave antenna is applicable to millimeter-wave automotive communication or indoor wireless communication.In addition, half-module substrate integrated waveguide leaky-wave antenna also has the bandwidth of broad, and parasitic disturbances is smaller.
Description of drawings
Fig. 1 is microwave and millimeter wave automobile and indoor communications antenna schematic diagram,
Fig. 2 is the top level structure parameter tags figure of microwave and millimeter wave automobile and indoor communications antenna, and the underlying metal face is metal entirely, does not draw.
Fig. 3 is the S parameter result of the emulation and the test of microwave and millimeter wave automobile and indoor communications antenna.
Fig. 4 is the emulation 3D directional diagram of microwave and millimeter wave automobile and indoor communications antenna.
Fig. 5 is that the auto communication of microwave and millimeter wave automobile and indoor communications antenna is used schematic diagram.
Fig. 6 is microwave and millimeter wave automobile and indoor communications antenna 26.5GHz H face directional diagram.
Fig. 7 is microwave and millimeter wave automobile and indoor communications antenna 26.5GHz E face directional diagram.
Fig. 8 is microwave and millimeter wave automobile and indoor communications antenna 28GHz H face directional diagram.
Fig. 9 is microwave and millimeter wave automobile and indoor communications antenna 28GHz E face directional diagram.
Have among the above figure: dielectric substrate 1; last metal covering 2; plated-through hole 3; following metal covering 4,50 ohm microstrip 5, little band-half module substrate integrated wave guide switching 6; the half module substrate integrated wave guide 7 of normal width; the half module substrate integrated wave guide 8 of width gradual change, the half module substrate integrated wave guide 9 of leaky wave part, the part medium 10 of removal.
Embodiment
Execution mode of the present utility model is as follows: the half module substrate integrated wave guide 9 of the leaky wave part that the employing width reduces is to realize effective leaky wave radiation; This antenna is metal covering 4 under the bottom of dielectric substrate 1 covers fully, top layer covers goes up metal covering 2, is positioned at the half module substrate integrated wave guide 7 of normal width, the half module substrate integrated wave guide 8 of width gradual change, the upper and lower metal level of plated-through hole 3 connections of leaky wave half module substrate integrated wave guide 9 one sides partly; Be convenient test, input/output terminal is 50 ohm microstrip 5.For a selected operating frequency, according to key index selected material and thickness thereof such as the dielectric constant of dielectric substrate and loss angle tangents.Choose reasonable half module substrate integrated wave guide width: avoid the cut-off characteristics of waveguide that the device performance in the working frequency range is produced harmful effect, and guarantee that waveguide main die worker in working frequency range does.According to suitable plated-through hole diameter and through-hole spacings of selection such as working frequency range, make half module substrate integrated wave guide through-hole side wall leakage losses to ignore, satisfy processing request simultaneously.From the angle of test, little band output should present 50 ohmages, obtains corresponding micro belt line width as standard.The width and the length of the little band of optimal design-half module substrate integrated wave guide tapering transition section make half module substrate integrated wave guide and 50 ohm microstrip coupling.
Suitably reduce the width of half module substrate integrated wave guide, the radiance of antenna is enhanced.The selection of the width of leaky wave radiant section half module substrate integrated wave guide should realize that effective leaky wave avoids the too small cut-off region that enters of width again in operating frequency.Half module substrate integrated wave guide width after reducing is less, and directly coupling is difficult.For improving coupling, adopt the half module substrate integrated wave guide of the width gradual change of certain-length, with the matched well between the half module substrate integrated wave guide of realizing normal width and leaky wave part.The leaky wave partial-length mainly influences the half-power beam width of antenna, leaky wave efficient and antenna side lobe.The leaky wave partial-length is big more, and then radiation efficiency is high more and wave beam is narrow more.In actual design, need between desired antenna electric performance index and acceptable antenna size, compromise.On the other hand, opening surface medium on one side also has to a certain degree constraint to electromagnetic wave, and metal ground then can significantly influence far-field pattern.In addition, remove the efficient that certain medium and metal ground help aerial radiation equally.Yet, need to guarantee a day line width, make it have certain mechanical strength.
By above-mentioned implementation step, designed a material object that is operated in the half-module substrate integrated waveguide leaky-wave antenna of 28GHz.In the leaky-wave antenna experimental verification, L
2Be taken as 100mm, both reached antenna performance preferably, keep the advantage of its compact conformation again.The dielectric material thickness that is adopted is 0.508mm, and dielectric constant is 2.2.
Half-module substrate integrated waveguide leaky-wave antenna structural parameters (unit: mm)
| d p W 50 L t W t | 0.4 0.8 1.54 10 2.5 | L 1 W 1 W 2 L 2 | 6.0 4.2 2.1 100 |
Claims (2)
1. microwave and millimeter wave automobile and indoor communications antenna, the half module substrate integrated wave guide (9) that it is characterized in that adopting the leaky wave part that width reduces is to realize effective leaky wave radiation; This antenna covers metal covering (4) down fully at the bottom of dielectric substrate (1), top layer cover to be gone up metal covering (2), and the plated-through hole (3) of half module substrate integrated wave guide (9) one sides that is positioned at half module substrate integrated wave guide (8), the leaky wave part of half module substrate integrated wave guide (7), the width gradual change of normal width connects upper and lower metal level; Be convenient test, input/output terminal is 50 ohm microstrip (5).
2. microwave and millimeter wave automobile according to claim 1 and indoor communications antenna; it is characterized in that, be operated in the half-module substrate integrated waveguide leaky-wave antenna of 28GHz, adopting through-hole diameter is the plated-through hole (3) of 0.4mm; 0.8mm through-hole spacing, the dielectric material that 0.508mm is thick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920039530U CN201383548Y (en) | 2009-04-15 | 2009-04-15 | Microwave and millimeter wave antennas for cars and indoor communications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920039530U CN201383548Y (en) | 2009-04-15 | 2009-04-15 | Microwave and millimeter wave antennas for cars and indoor communications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201383548Y true CN201383548Y (en) | 2010-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920039530U Expired - Fee Related CN201383548Y (en) | 2009-04-15 | 2009-04-15 | Microwave and millimeter wave antennas for cars and indoor communications |
Country Status (1)
| Country | Link |
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| CN (1) | CN201383548Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938040A (en) * | 2010-07-27 | 2011-01-05 | 东南大学 | Wide-angle range scanning periodical leaky-wave antenna |
| CN113991309A (en) * | 2021-11-22 | 2022-01-28 | 四川大学 | Substrate integrated waveguide traveling wave antenna |
-
2009
- 2009-04-15 CN CN200920039530U patent/CN201383548Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938040A (en) * | 2010-07-27 | 2011-01-05 | 东南大学 | Wide-angle range scanning periodical leaky-wave antenna |
| CN113991309A (en) * | 2021-11-22 | 2022-01-28 | 四川大学 | Substrate integrated waveguide traveling wave antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100113 Termination date: 20180415 |