34 results about "Te waves" patented technology

The invention provides an intermediate infrared 10.6-micrometer narrow bandwidth angle wave-absorbing material, and discloses a metamaterial wave-absorbing material based on a plane two dimensional photonic crystal structure. The wave-absorbing material comprises three layers, wherein the first layer is a cross-shaped metal tungsten patch periodic array, the second layer is a medium layer, and the third layer is a metal reflection layer. By means of optimization of structural parameters, the wave-absorbing material has relatively ideal absorbing effects around 10.6 micrometers, the absorption rate of the wave-absorbing material can achieve more than 98% for TE waves with incident angles ranging from 0 degree to 40 degrees, and the absorption rate of the wave-absorbing material can achieve more than 98% for TM waves with incident angles ranging from 0 degree to 80 degrees.

The invention discloses a TeraHertz wave polarization beam splitter of a periodically staggered rectangular structure. The TeraHertz wave polarization beam splitter of the periodically staggered rectangular structure comprises a metal conveying layer of an staggered rectangular structure, a substrate, a reflecting metal plate, a signal input end, a first signal output end and a second signal output end, wherein the metal conveying layer of the staggered rectangular structure is connected with the substrate, the substrate is connected with the metal reflecting plate, the metal conveying layer of the staggered rectangular structure comprises 100*100 staggered rectangular metal units, signals are input from the signal input end, sequentially pass through the metal conveying layer of the staggered rectangular structure and the substrate, reach the metal reflecting plate and are reflected by the metal reflecting plate towards two directions, the first signal output end outputs TE waves, and the second signal output end outputs TM waves. The TeraHertz wave polarization beam splitter of the periodically staggered rectangular structure has the advantages of being simple and compact in structure, high in beam splitting efficiency and convenient to manufacture , saving materials and the like, meets the application requirements of the TeraHertz technology in the future, and has indispensable significance in facilitating the research of TeraHertz functional devices.

The invention discloses a terahertz wave polarization beam splitter with trapezoidal structures loaded on the borders. The terahertz wave polarization beam splitter comprises a signal input terminal, a first signal output terminal, a second signal output terminal, a far infrared quartz glass matrix and a polarization beam splitting piece; the polarization beam splitting piece is arranged on the far infrared quartz glass matrix; the polarization beam splitting piece comprises a left side narrow rectangular polarization silicon waveguide, a right side wide rectangular polarization silicon waveguide, an upper side rectangular polarization silicon waveguide, a lower side rectangular polarization silicon waveguide, a long trapezoidal polarization silicon waveguide and a short trapezoidal polarization silicon waveguide; signals are vertically emitted from the signal input terminal and pass through the polarization beam splitting piece; the first signal output terminal outputs TE waves; and the second signal output terminal outputs TM waves, so that polarization beam splitting performance is obtained. The terahertz wave polarization beam splitter has the advantages of simple structure, high beam splitting rate, small dimension, low cost, convenience in manufacture and the like.

The invention relates to a strip sub-wavelength aluminum metal polarization grating, and belongs to the technical field of applied optics. The strip sub-wavelength aluminum metal polarization gratinghas a length of 12mm and a width of 1.5mm, and is composed of 12000 aluminum metal grid units arranged in parallel, wherein in each unit, the grid direction changes for 60'' in turn, the grating period is 200nm, the duty cycle is 0.5, and the grating has a ridge thickness of 200mm. The grating has obvious polarization splitting function for the linearly polarized light having a wavelength greaterthan three times or more of the cycle, that is, the TE wave of an optical wave component parallel to the direction of the aluminum metal grid is reflected or absorbed, the TE wave of an optical wave component vertical thereto direct pass through, the transmittance of the TM wave of the grating is greater than 0.80, and the extinction ratio is greater than 34dB. The linearly polarized light forms astrip facula, which is staggered between light and dark in the vertical direction and linearly translates along with the rotation of the polarization plane. The strip sub-wavelength aluminum metal polarization grating can be used for measurement of angle of rotation of the linearly polarized light.

The present invention relates to the field of radar stealth systems, and in particular to a method for improving the movement of a Salisbury screen and a UHF radar spectrum. The method comprises: designing a novel Salisbury screen based on the time-controlled reflection surface to obtain a reflection coefficient expression of TE waves and TM waves; and loading a layer of negative inductive reactance on the surface of a resistive layer on the Salisbury screen, improving the applicability of large bandwidth, multi-directional, dual polarized radar waves, and deriving the optimal solution under inductive matching. The method disclosed by the present invention can reduce the working frequency of the screen, increase the working bandwidth, greatly reduce the thickness of the screen, and improvethe scope of the phase modulation screen; and the screen helps to reduce the radar reflective cross-section material to achieve the design of an ultra-thin broadband radar absorber structure.

The invention discloses a terahertz wave polarization beam splitter connected in series with three semi-arc structures. The terahertz wave polarization beam splitter comprises a signal input end, a first signal output end, a second signal output end, a first straight waveguide, a second straight waveguide, a third straight waveguide, a fourth straight waveguide, a first semicircular waveguide structure, a second semicircular waveguide structure, a third semicircular waveguide structure, a first cladding layer and a second cladding layer, wherein the first cladding layer is uniformly and symmetrically coated at the periphery of the second straight waveguide; the second cladding layer is uniformly and symmetrically coated at the periphery of the third straight waveguide; and a signal is input from the signal input end, TE waves are output from the first signal output end and TM waves are output from the second signal output end through the asymmetric coupling functions of the first cladding layer and the second cladding layer, and polarization beam-splitting performance is obtained. The terahertz wave polarization beam splitter is simple in structure, high in beam-splitting rate, small in size, low in cost and easy to manufacture.

In order to provide a dielectric constant estimation device whereby the dielectric constant of an object can be estimated with high precision without contact with the object even when the shape of theobject is uncertain, and a microwave heating apparatus provided with the dielectric constant estimation device, a dielectric constant estimation device according to the present invention is configured so that a transmission antenna (4) and a reception antenna (6) are provided whereby the polarization of electromagnetic waves can be switched between TE waves and TM waves, a TM/TE reflection ratiois calculated on the basis of reflected TE waves and reflected TM waves from an object, the calculated TM/TE reflection ratio and dielectric constant data of theoretical values compiled as a databasestored in advance in a memory unit (10) are compared, and the dielectric constant of the object is estimated.

A semiconductor device making method includes providing a photomask having a patterned absorption layer over a substrate. The photomask is irradiated with a beam having a mixture of transverse electronic (TE) waves and transverse magnetic (TM) waves. The irradiating includes generating surface plasmonic polaritons (SPP) on a sidewall of the patterned absorption layer. The SPP is used to suppress the TM waves while reflecting the TE waves. A target substrate is exposed to TE waves.

The invention discloses an all-dielectric polarization beam splitter, which comprises a substrate; the grating layer is formed on one side of the substrate, comprises a plurality of parallel wire gratings formed by adopting a nanoimprint process on the multiple non-metal dielectric layers, and is suitable for carrying out polarization beam splitting on incident light so as to reflect TE waves of the incident light and transmit TM waves of the incident light; wherein the multiple dielectric layers of each wire grating are formed by periodically stacking in the thickness direction according to a high and low refractive index alternating mode, and the wavelength of incident light is within the light filtering wavelength range of the multiple dielectric layers. The invention further provides a manufacturing method of the all-dielectric polarization beam splitter. The all-dielectric polarization beam splitter provided by the invention can realize polarization beam splitting of incident light.

The invention discloses an embedded end-fire array element and an antenna. Three techniques are used in the aspect of improving the bandwidth of the antenna. (1) a trapezoidal waveguide cavity is adopted to realize only a pure TE10 mode appears in an extremely wide frequency band; (2) a smoothly loaded extension part B is formed at the end of a radiation patch, a structure not limited to an elliptical structure is formed, the end current reflection is reduced, and impedance matching is improved; and (3) ridges with exponential cambered surfaces or linear bevels are adopted to form an H-faced horn waveguide structure with ridges, and the TE10 mode can be controlled to work in an extremely wide frequency band range. In order to increase the antenna gains, a low-cost, low-dielectric constantTeflon material is selected as a wedge-shaped dielectric prism, the dielectric constant of the material is 2.2, the thickness is up to 8 mm, the bottom surface has a form of any curve changing from 8mm to 0 mm, and the surface is flush with the surface of a metal carrier. Radiation conversion from TE waves to leaky waves is realized, and the radiation gains of the antenna are improved.

The invention relates to a graphene-based novel isolator. The isolator is composed of wire grid polarizers (21) and (22) and three groups of single-layer graphenes (3) standing freely. A wire grid polarizer (2) is formed by parallel arrangement of metal columns (8) at equal intervals; the single-layer graphenes (3) are arranged to be parallel to the wire grid polarizers (21) and (22); a bias magnetic field vertically passes through the single-layer graphenes (3); and TE waves input by a signal input/output port (1) can pass through the isolator, and TE waves input by a signal input/output port (5) cannot pass through the isolator. Within a working frequency range, the isolator has good isolation performance and also has the advantages of large power capacity, compact structure, rapid heat dissipation and the like.

The invention discloses a full-angle perfect matching wave-absorbing darkroom with reconfigurable frequency. Comprising a wave-absorbing medium unit, a wave-absorbing medium layer prepared by the wave-absorbing medium unit, a wave-absorbing medium prepared by using the wave-absorbing medium layer, and a frequency-reconfigurable full-angle perfect matching wave-absorbing darkroom prepared by using the wave-absorbing medium. In the design, the wave-absorbing medium layers of which the relative dielectric constants are certain specific values are sequentially overlaid in the wave propagation direction to realize the wave-absorbing medium conforming to spatial K-K distribution; two Lorentz resonances are constructed in a relative dielectric constant section of a wave-absorbing medium, the position where the real part of the relative dielectric constant is 1 is cut off to achieve matching of a K-K medium and air, and a lumped element is added into a wave-absorbing medium unit to achieve the frequency reconfigurable characteristic of the wave-absorbing medium. All the layers of wave absorbing media are sequentially stacked in the radial direction to achieve the frequency-reconfigurable full-angle perfect matching wave absorbing darkroom. The full-angle perfectly matched wave-absorbing darkroom with the reconfigurable frequency prepared by the invention can realize full-angle non-reflection absorption of wide-band TE waves.

The invention relates to an airtight metal-ceramic housing applied to 60 GHz. The airtight metal-ceramic housing structurally comprises a metal heat sink, a metal frame and ceramic insulators, whereinfour screw fixing holes and two rectangular waveguides in a vertical direction are designed on the metal heat sink; one open slot is formed in each long side of the rectangular waveguides; the ceramic insulators are embedded in the open slots of the rectangular waveguides; the metal frame is connected with the metal heat sink to form a housing for encapsulating a 60 GHz chip; a high-frequency signal transmission channel adopts awaveguide-microstrip transition structure for converting TE waves of the rectangular waveguides into quasi-TEM waves of a microstrip line, so that signals are transmitted from an external circuit to the chip in the housing. The airtight metal-ceramic housing provided by the invention has advantages that the housing adopts the rectangular waveguides as input and output ports so as to be more conveniently interconnected with the external circuit and realize low inserting loss and high power capacity; the ceramic insulator adopts a ceramic-metal-ceramic structure,which not only can play a role of waveguide-microstrip conversion, but also can realize airtight encapsulation.

The invention discloses a terahertz wave dual-mode polarized power splitter. The power splitter comprises a base layer, first and second tapered directional couplers, a single-mode waveguide, a multi-mode waveguide, a signal input end, three signal output ends, first and second separation zones on the first tapered directional coupler, first and second multiplex zones on the second tapered directional coupler, a first linear tapered waveguide connecting the first and second separation zones, and a second linear tapered waveguide connecting the first and second multiplex zones. Signals are input from the signal input end, TE (Transverse Electric) waves are coupled to the multi-mode waveguide through the first separation zone and converted into TM (Transverse Magnetic) waves, and then the TMwaves are coupled to the single-mode waveguide and output through the first, second and third signal output ends. The TM waves are coupled to the single-mode waveguide through the first and second separation zones and converted into TE waves through the first and second multiplex conversion zones, and the TE waves are output through the first and second signal output ends. The power splitter hasthe advantages of mode conversion, small size, easy integration and the like.