CN107275727B - A kind of 340GHz is based on film-type device quasi-optical broadband duplexer - Google Patents

A kind of 340GHz is based on film-type device quasi-optical broadband duplexer Download PDF

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Publication number
CN107275727B
CN107275727B CN201710506389.0A CN201710506389A CN107275727B CN 107275727 B CN107275727 B CN 107275727B CN 201710506389 A CN201710506389 A CN 201710506389A CN 107275727 B CN107275727 B CN 107275727B
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film
340ghz
polarization
wave
type device
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CN107275727A (en
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王学田
张盟
高洪民
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Beijing University of Technology
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Beijing University of Technology
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • 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
    • H01Q13/02—Waveguide horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • H01Q15/242—Polarisation converters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • H01Q15/242—Polarisation converters
    • H01Q15/244—Polarisation converters converting a linear polarised wave into a circular polarised wave

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)

Abstract

The invention discloses a kind of 340GHz to be based on film-type device quasi-optical broadband duplexer, which includes: to inhale wave cavity, polarization isolation device, polarization changer, a pair of 340GHz transmitting-receiving reciprocity electromagnetic horn and a pair of of antenna holder；Inhaling wave cavity is the cylindrical cavities that an outer shape is T font；Polarization isolation device side is equipped with the film with metal line grating；Polarization isolation device is fixed on the suction intracorporal horizontal segment of wave chamber and mutually passes through place with vertical section, and is in 45 degree of angles with horizontal segment；Polarization changer is a circular metal gasket, its both side surface posts film, each film is equipped with periodical metal unit array, and metal unit is a rectangle sheet metal for running through film surface, is uniformly provided with row's square-shaped metal thin slice between two neighboring rectangle sheet metal；Polarization changer is tilted a certain angle in the horizontal segment for being fixed on and inhaling wave cavity.The present invention can not only solve the problems, such as in the prior art in the transceiver insulation of same frequency point signal, moreover it is possible to reduce the multipath effect of electromagnetic wave.

Description

A kind of 340GHz is based on film-type device quasi-optical broadband duplexer
Technical field
The present invention relates to radar and fields of communication technology, and in particular to a kind of 340GHz is wide based on film-type device quasi-optical Band duplexer.
Background technique
In radio systems, transmitter works in ultra high power, and receiver then works in ultra low power, when needing to receive and dispatch How information guarantees that transmitter power does not enter receiver and burns receiver when same place is completed, be guarantee system just The necessary condition often to work realizes that the device of this function becomes duplexer.The duplexer form of low frequency microwave wave band mainly has It is waveguide duplexer, coaxial duplexer, dielectric duplexer, surface acoustic wave (SurfaceAcousticWave-SAW) duplexer, micro- Band duplexer etc., however the duplexer of above-mentioned form is limited to what manufacturing process was extremely difficult to realize in terahertz wave band, it is existing at present Have practical waveguide type duplexer also only in 110GHz or so, into centimeter wave frequency range using more circulator realize transmitting-receiving every From, and the ferritic research of combination and application are the recent quantum jumps of the microwave technology.Circulator applies the micro- of 1/4 wavelength Wave transmission line principle, very dependent on operation wavelength, therefore narrower bandwidth, but can not still apply and involve submillimeter wave in millimeter Wave band.Currently, the duplexer highest working frequency range of the applied MEMS technology in Nanjing 55 production is 60-90GHz.
For Terahertz frequency range electromagnetic wave, wavelength enters millimeter and micron dimension, and the production of above-mentioned duplexer is that extremely have Difficulty.Therefore recent domestic proposes the duplexer much manufactured based on quasi-optical method in Terahertz frequency range. Main Types have: the transceiver insulation based on optical beam-splitter, this method is although simple and easy at low cost, but signal path transmits Loss is big, and isolation is lower；It is the quasi-optical duplexer of linear polarization based on Faraday rotation piece outgoing wave, but with frequency It increases and the loss of revolving fragment bring is polarized for increasing by faraday, isolation is general maximum in 40dB or so, and outgoing wave is line pole Change, echo noise is relatively low when irradiating complex object；It is quasi-optical based on reflection-type polarization changer and transmittance polarization changer Type duplexer, wherein the quasi-optical duplexer outstanding advantages based on reflection-type polarization changer are that the low isolation of transmission loss is high, But its bandwidth of operation is relatively narrow, has high requirement to placement angle and electromagnetic wave incident angle, is based on transmittance polarization changer Quasi-optical duplexer can effectively overcome these disadvantages, but the design of high-performance transmission-type polarization changer and processing are in millimeter It is larger to involve Terahertz frequency range difficulty, and since device feature size is smaller, the shortage of effective absorbing material is very easy in device The edge of part generates the diffraction of electromagnetic wave.Therefore, be badly in need of wanting high-performance duplexer of the development work near 340GHz frequency and Its key composition device.
Summary of the invention
In view of this, the present invention provides a kind of 340GHz to be based on film-type device quasi-optical broadband duplexer, it can not only It enough solves the problems, such as in the prior art in the transceiver insulation of same frequency point signal, moreover it is possible to reduce the multipath effect of electromagnetic wave.
Realize that technical scheme is as follows:
A kind of 340GHz is based on film-type device quasi-optical broadband duplexer, the duplexer include: inhale wave cavity, polarization every From device, polarization changer, a pair of 340GHz transmitting-receiving reciprocity electromagnetic horn and a pair of of antenna holder；
The wave cavity of inhaling is the cylindrical cavities that an outer shape is T font, and inside cavity shape is identical as outer shape； The polarization isolation device is an oval metal gasket, and one side is equipped with the film with metal line grating；The polarization isolation device It is fixed on the suction intracorporal horizontal segment of wave chamber and mutually passes through place with vertical section, and be in 45 degree of angles with horizontal segment；The polarization changer is One circular metal gasket, both side surface post film, and each film is equipped with periodical metal unit array, the metal list Member is a rectangle sheet metal for running through film surface, and row pros are uniformly provided between two neighboring rectangle sheet metal Shape sheet metal；The polarization changer is tilted a certain angle in the horizontal segment for being fixed on and inhaling wave cavity；In the antenna holder One be fixed on inhale wave cavity vertical section top, another be fixed on inhale wave cavity horizontal segment one end；The loudspeaker day Line is fixed on antenna holder.
Further, the inclined angle of polarization changer of the present invention is between 5 ° -20 °, is preferably chosen for 15 °.
Further, the grating on the metallic film of polarization isolation device of the present invention side are as follows: the period is less than operating wave The wire grating structure that long duty ratio is about 0.5.
Further, polarization changer of the present invention is transmission-type polarization changer.
Further, film of the present invention uses ultra-thin polyimide substrate；
Further, Kapton of the present invention is liquid polyimide solution by revolving in hard substrate surface Solidification is applied to obtain.
Further, on polarization isolation device of the present invention film with a thickness of 10um, the thickness of film on polarization changer Degree is 5um.
Further, the material of periodical metal unit array of the present invention is aluminium, with a thickness of 500nm.
Further, square-shaped metal thin slice width of the present invention is 136um, and the period of square-shaped metal thin slice is 261um, rectangle sheet metal width are 116um, period 457um.
The utility model has the advantages that
1, the present invention inhales the design of wave cavity so that signal transmission path is short, and transmission channel and receiving channel share, section It has saved material and has improved efficiency.
2, the present invention is inhaling the design that polarization isolation device is arranged in wave cavity, reduces electromagnetism while improving isolation The multipath effect of wave.
3, waveguide devices are collectively formed in present invention suction wave cavity, antenna holder and dual-mode antenna, on the basis of miniaturization It is greatly reduced the quality of device itself, the application being more suitable in space flight and air line, while will be received in the present invention Hair antenna is integrated using antenna holder and suction wave cavity, solves the problems, such as to fill in terahertz wave band micro-group.
4, not only applying frequency is high, application bandwidth is big by the present invention, but also transmission loss is small, wherein Primary Component polarization isolation The selection of device and polarization changer and structure design meet the application of 340GHz high-frequency apparatus, and in 325GHz-355GHz frequency All there is superior performance in section.
5, the present invention, which inhales polarization changer placement location and suction wave cavity central axes in wave cavity, has a low-angle, The isolation of device is increased when angle is smaller, and transmission loss is influenced smaller.
6, for the opposite conventional diplexer of the present invention, in same frequency point, with can provide high-isolation in frequency band.
Detailed description of the invention
Fig. 1 is the throwing face schematic diagram of 340GHz quasi-optical broadband duplexer cavity of the invention；
Fig. 2 be 340GHz quasi-optical broadband duplexer device of the invention schematic three dimensional views (contain antenna holder and Antenna)；
Fig. 3 is the structural schematic diagram of polarization changer periodicity metal unit array；
Fig. 4 is thin-film device figure in 340GHz of embodiment of the present invention quasi-optical broadband duplexer；
Fig. 5 is that 340GHz of embodiment of the present invention quasi-optical broadband duplexer is surveyed in two cross polarization direction of an electric field transmission loss Attempt；
Fig. 6 is 340GHz of embodiment of the present invention quasi-optical broadband duplexer isolation measured result.
Wherein, 1- inhales wave cavity, 2- polarization isolation device, 3- polarization changer, 31- periodicity metal unit, 32- Square-shaped metal thin slice.
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The present invention provides a kind of 340GHz and is based on film-type device quasi-optical broadband duplexer, as depicted in figs. 1 and 2, should Duplexer includes inhaling wave cavity 1, polarization isolation device 2, polarization changer 3, a pair of 340GHz transmitting-receiving reciprocity electromagnetic horn and a pair Antenna holder 4；The wave cavity 1 of inhaling is the column wave-guide cavity wave that an outer shape is T font, and inside cavity is shape and outside The consistent hollow cavity through each end face of shape；The polarization isolation device 2 is an oval metal gasket, and one side is equipped with Film with metal line grating, the polarization isolation device, which is fixed on, to be inhaled the intracorporal horizontal segment of wave chamber and mutually passes through place with vertical section, and with Horizontal segment is in 45 degree of angles；The polarization changer 3 is a circular metal gasket, and both side surface posts film, each film It is equipped with 31 array of periodical metal unit, the periodicity metal unit 31 is a rectangle metal foil for running through film surface Piece is uniformly provided with row's square-shaped metal thin slice 32 between two neighboring rectangle sheet metal, as shown in figure 3, the polarization Converter is tilted a certain angle in the horizontal segment for being fixed on and inhaling wave cavity；One in the antenna holder is fixed on suction wave cavity The top of vertical section, another is fixed on the one end for inhaling wave cavity horizontal segment；The electromagnetic horn is fixed on antenna holder.
Antenna holder described in the present embodiment is fixed by waveguide port with wave cavity is inhaled, and one of antenna holder is fixed In the top for inhaling wave cavity vertical section, another antenna holder, which is fixed on, inhales wave cavity horizontal segment close to one end of polarization isolation device On.
Polarization changer tilts certain angle (forming a low-angle with suction wave cavity central axes) in the present embodiment, As the increase of angle can increase the isolation of device, but the excessive transmission loss that will increase the duplexer of angle, therefore this The angle is in the angular range of 5 degree of -20 degree in example, and preferably 15 degree.
This example inhales wave cavity 1 and uses waveguide type module, and internal electromagnetic transmission channel is the inner cavity of diameter about 30mm；For The multipath reflection for reducing metal cavity surrounding electromagnetic wave, using Bei Kuangci material Co., Ltd ferrite wave-absorbing material BMA-RD Waveguide inner cavity surface is mounted, i.e., interior surface mounts one layer of BMA-RD ferrite wave-absorbing material.
Grating on the metallic film of 2 side of this example polarization isolation device is the period is much smaller than the duty ratio of operation wavelength 0.5 wire grating structure, can be realized good isolation effect.
This example polarization changer 3 is transmission-type polarization changer, and the material of periodical metal unit array is aluminium, period Property metal unit array with a thickness of 500nm, greater than the three times skin depth of working frequency range, square-shaped metal thin slice width is 136um, rectangle sheet metal width are 116um, period 457um*261um.
Film on this example polarization isolation device 2 and polarization changer 3 is all made of ultra-thin polyimide substrate, polyimides Substrate is liquid polyimide solution by solidifying to obtain in the surfaces spin coating such as hard substrate such as sheet glass, silicon wafer, with a thickness of 5um。
It is based on film-type device quasi-optical broadband duplexer using 340GHz of the present invention, if transmitting antenna transmitting electromagnetic wave is Vertical line polarization wave, polarization isolation device can pass through the vertical line polarization wave of transmitting, and transmission loss is maintained at a below 0.5dB is horizontal；(its polarization direction and transmitting antenna are mutually perpendicular to), the transmitted wave meeting of horizontal polarized components for receiving antenna It is isolated most of power in polarization isolation device position, which is able to satisfy transmitted antednna beam center power density and enters The ratio between receiving antenna power density maintains 43dB or more.In transmitting path, polarization changer can be transmitting terminal vertical line pole Change wave conversion is circularly polarised wave (assuming that polarization direction be left-handed), when transmitted wave is irradiated to detection target, forms reverse circular polarisation Echo, the circularly polarised wave rotation direction direction and transmitting circularly polarised wave are on the contrary, i.e. right-handed circular polarization wave at this time.The right-handed circular polarization wave by Polarization changer becomes line polarization wave again, at this time echo be horizontal linear polarization wave (i.e. echo and transmitting line polarization wave mutually just It hands over).Echo shows as reflected version at polarization isolation device, into receiving antenna and reflection loss very little, receiving channel at this time Received target echo signal energy is originally relatively very low, impacts to transmission channel substantially negligible.This example 340GHz quasi-optical broadband duplexer is tested in two cross polarization direction of an electric field transmission loss as shown in figure 5, this example 340GHz The isolation degree test figure of quasi-optical broadband duplexer device is as shown in Figure 6.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (10)

1. a kind of 340GHz is based on film-type device quasi-optical broadband duplexer, which is characterized in that the duplexer includes: to inhale wave chamber Body, polarization isolation device, polarization changer, a pair of 340GHz transmitting-receiving reciprocity electromagnetic horn and a pair of of antenna holder；
The wave cavity of inhaling is the cylindrical cavities that an outer shape is T font, and inside cavity shape is identical as outer shape；It is described Polarization isolation device is an oval metal gasket, and one side is equipped with the film with metal line grating；The polarization isolation device is fixed Place is mutually passed through with vertical section in inhaling the intracorporal horizontal segment of wave chamber, and is in 45 degree of angles with horizontal segment；The polarization changer is a circle Shape metal gasket, both side surface post film, and each film is equipped with periodical metal unit array, and the metal unit is One runs through the rectangle sheet metal of film surface, and row square gold is uniformly provided between two neighboring rectangle sheet metal Belong to thin slice；The polarization changer inclination is fixed in the horizontal segment for inhaling wave cavity；One in the antenna holder is fixed on The top of wave cavity vertical section is inhaled, another is fixed on the one end for inhaling wave cavity horizontal segment；The electromagnetic horn is fixed on antenna On bracket.
2. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 1, which is characterized in that the day Line bracket is fixed by waveguide port with wave cavity is inhaled.
3. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 1, which is characterized in that another Antenna holder, which is fixed on, inhales wave cavity horizontal segment on one end of polarization isolation device.
4. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 1, which is characterized in that the pole Change the inclined angle of converter to be between 5 ° -20 °.
5. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 4, which is characterized in that the pole Changing the inclined angle of converter is 15 °.
6. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 1, which is characterized in that the pole Change the grating on the metallic film of isolator side are as follows: the period is less than operation wavelength, and the wire grating knot that duty ratio is 0.5 Structure.
7. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 1, which is characterized in that the pole The film for changing isolator and polarization changer is all made of ultra-thin polyimide substrate, and the polyimide substrate is that liquid polyamides is sub- Amine aqueous solution in hard substrate surface spin coating by solidifying to obtain.
8. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 7, which is characterized in that the pole Change film on isolator with a thickness of 10um, film with a thickness of 5um on polarization changer.
9. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 1, which is characterized in that the week The material of phase property metal unit array is aluminium, with a thickness of 500nm.
10. 340GHz is based on film-type device quasi-optical broadband duplexer according to claim 1, which is characterized in that described Square-shaped metal thin slice width is 136um, and the period of square-shaped metal thin slice is 261um, and rectangle sheet metal width is 116um, Period is 457um.
CN201710506389.0A 2017-06-28 2017-06-28 A kind of 340GHz is based on film-type device quasi-optical broadband duplexer Active CN107275727B (en)

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Publication number Priority date Publication date Assignee Title
CN109004321B (en) * 2018-06-27 2021-07-09 安徽华东光电技术研究所有限公司 Quasi-optical submillimeter wave isolator based on dielectric waveguide

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EP2363912A1 (en) * 2010-03-04 2011-09-07 Astrium GmbH Diplexer for a reflector antenna
CN105098297A (en) * 2014-05-21 2015-11-25 南京天璇电子技术有限公司 Compact structure T-type orthogonal mode converter and waveguide duplexer composed of compact structure T-type orthogonal mode converter

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EP1333525A1 (en) * 2002-01-30 2003-08-06 Prodelin Corporation Antenna feed assembly with selectable polarizations
CN101227019A (en) * 2008-02-19 2008-07-23 北京中航思瑞科技有限公司 Broadband duplexer
EP2363912A1 (en) * 2010-03-04 2011-09-07 Astrium GmbH Diplexer for a reflector antenna
CN105098297A (en) * 2014-05-21 2015-11-25 南京天璇电子技术有限公司 Compact structure T-type orthogonal mode converter and waveguide duplexer composed of compact structure T-type orthogonal mode converter

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"一种500GHz 基于加载电容电感效应的反射型极化变换器";张盟，等;《2017年全国微波毫米波会议论文集（中册）》;20170508;第1675-1678页 *

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