CN208272081U

CN208272081U - Rectangle E flank of tooth multiple-grooved band hinders Slab Dielectric Waveguide terahertz filter

Info

Publication number: CN208272081U
Application number: CN201820590178.XU
Authority: CN
Inventors: 王志辉
Original assignee: Southwest Electronic Technology Institute No 10 Institute of Cetc
Current assignee: Southwest Electronic Technology Institute No 10 Institute of Cetc
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2018-12-21
Anticipated expiration: 2028-04-24

Abstract

The utility model proposes a kind of rectangle E flank of tooth multiple-grooved band hinder Slab Dielectric Waveguide terahertz filter, it is desirable to provide a kind of structure is simple, easy processing, can be widely applied for the radio-frequency filter structure of Terahertz planar circuit.The utility model is achieved by the following scheme: opposite symmetrical E flank of tooth band resistance slot up and down is produced in two media plate waveguides (2) parallel each other, hole slot one end perception window coupling input of the THz wave from air layer (3), it couples and exports from the other end perception window of the rectangular waveguide cavity strap clearance channel between two parallel media plate waveguides, to form rectangle E flank of tooth multiple-grooved band resistance terahertz filter, when terahertz signal, which enters, hinders the Terahertz resonant cavity that slot and air layer are constituted by media plate waveguide E flank of tooth band, it can resonate under certain frequency, coupling is generated in Terahertz resonant cavity, by changing accordingly as band logical, band resistance, the terahertz signal of input is filtered, frequency-selecting.

Description

Rectangle E flank of tooth multiple-grooved band hinders Slab Dielectric Waveguide terahertz filter

Technical field

The utility model is the terahertz filter structure about a kind of based on Slab Dielectric Waveguide, and Terahertz may be implemented The filter of the functions such as radiofrequency signal filtering, frequency-selecting.

Background technique

Terahertz radiation, which not only has the characteristics that microwave radiation also, has the characteristic of optical wavelength radiation.Logical common communication frequency Section generally only has several GHz or more than ten of GHz, and Terahertz frequency range often reaches several hundred or even thousands of GHz, therefore applies band It is wide very wide, and there is quite high wireless data transfer capability, it is even thousands of to go out hundred times fastly than current super-broadband tech Times.Many dielectric materials and non-polar material can not be detected with conventional means, and THz wave can be good at wearing These saturating materials, therefore conventional means can be not easy with the substance detected and carry out perspective imaging.This kind of transmission line of surface wave guide Both when can be longer used in wavelength (such as metric wave), it is also possible in extremely short wavelength (such as millimeter wave), in some instances it may even be possible to use terahertz waves Wave band.Filter is one of device indispensable in electronic system, for filtering out the interference being mingled in useful electromagnetic spectrum Signal improves system performance.Allow by frequency range be referred to as passband, corresponding wave can not by frequency range be exactly stopband.Filtering The many kinds of different properties of device, wherein waveguide filter is all-metal enclosed construction since structure is relatively simple, can be effective The radiation for preventing electromagnetic energy, cause it excellent with filter with low insertion loss and high power capacity for other type filters Point.In Terahertz frequency range, the too small major reason for becoming limitation terahertz filter development of physical size, therefore the difficulty or ease processed Degree also just becomes the significant consideration of design terahertz filter.In the terahertz filter of numerous kinds, due to waveguide Filter is metal enclosed structure, in comparison with other forms terahertz filter, can avoid electromagnetic radiation, power capacity Greatly, and the repeatability and simplicity of its structure, make it also and have the advantage in performance and cost.Waveguide filter is in millimeter at present Wave frequency section is also subject to processing the influence of means and precision in Terahertz frequency range, but in Terahertz frequency range, in property using commonplace It can go up no more than the similar filter worked in compared with low-frequency range, therefore improving its performance and simplifying structure is currently to THz wave One important research direction of waveguide filter.The design of modern microwave filter can use Distributed-parameter method and lumped-parameter method. Distributed-parameter method is to find out microwave filtering according to insertion decaying and insertion Phase-shift function, direct application transport line or waveguide theory Device component structure.This method relatively directly but calculates complexity, is not particularly suited for complicated structure and structure is relatively fixed. Slab Dielectric Waveguide can work on the basic mode mould of waveguide, play on millimeter wave and Terahertz planar circuit very important Effect.Compared to metal parallel plate waveguide, electromagnetic energy more effectively can be gathered in interior media area by Slab Dielectric Waveguide It is transmitted in domain, to enhance the energy accumulating ability of waveguide.But empirical discovery Terahertz frequency range physical size it is too small at To limit the major reason that terahertz filter develops, therefore the difficulty processed also just becomes the weight for designing terahertz filter Want factor.

Summary of the invention

The utility model aim is that in view of the deficiencies of the prior art, it is simple to provide a kind of structure, easy to process, plane Interconnectivity is good, the Terahertz Novel Filter structure based on Slab Dielectric Waveguide.The structure, which can be realized, believes Terahertz radio frequency Number the functions such as filtering, frequency-selecting, and the interconnection made between multiple Terahertz planar circuits is realized, to improve terahertz signal Transmitting and received efficiency.

The above-mentioned purpose of the utility model can be achieved by the following technical programs, a kind of rectangle E flank of tooth multiple-grooved band Slab Dielectric Waveguide terahertz filter is hindered, including two metal parallel plates, connects firmly media plate wave between metal parallel plate It leads, and the air layer being closed between media plate waveguide, it is characterised in that: two media plate waveguides parallel each other are formed with Opposite symmetrical E flank of tooth band hinders slot up and down, and THz wave is situated between from hole slot one end perception window coupling input of air layer from two in parallel The other end perception window of rectangular waveguide cavity strap clearance channel between matter planar waveguide couples output, to form rectangle E Flank of tooth multiple-grooved band hinders terahertz filter, hinders slot and air layer structure by media plate waveguide E flank of tooth band when terahertz signal enters At Terahertz resonant cavity when, can resonate under certain frequency, coupling be generated in Terahertz resonant cavity, by phase The variation answered is band logical, band resistance, is filtered to the terahertz signal of input, frequency-selecting.

The resonance that filtering and frequency-selecting function to Terahertz radiofrequency signal are mainly made of media plate waveguide and air layer Chamber is realized.

The utility model has the following beneficial effects: compared with the prior art

Structure is simple, easy to process.The utility model uses two parallel metal parallel-plates, connects firmly between metal parallel plate Media plate waveguide and the air layer that is closed between media plate waveguide, have in conjunction with metal parallel plate and Medium Wave Guide (PPDW) The advantages that broadband, low-loss, low dispersion and field distribution concentration and application easy to process；Overcome simple metals parallel-plate waveguide Lateral field distribution the problems in do not collect, what Terahertz perforation Slab Dielectric Waveguide and air layer were inputted as radiofrequency signal all the way Structure difficulty of processing can be effectively reduced in structure type, improve the realizability of technique.The repeatability and simplicity of its structure, make It also has the advantage in performance and cost.Relative to generally using microstrip structure or suspension microstrip structure Terahertz plane electricity The terahertz filters structure such as road, rectangular metal waveguide, co-planar waveguide, micro-strip, structure is more simple, and it is real that this makes it easier to processing Existing, so that the guided wave structure manufacturing process of the Terahertz for solving existing single structure form requires height, practical application is more difficult, difficult In processing the problems such as.

Stiffness of coupling is high.The utility model is produced opposite symmetrical up and down using two media plate waveguides parallel each other E flank of tooth band hinders slot, and THz wave is from hole slot one end perception window coupling input of air layer, between two parallel media plate waveguides The other end perception window of rectangular waveguide cavity strap clearance channel couples output, penetrates media plate waveguide material by Hertz wave Material transmission terahertz signal, can be coupled in inner dielectric layer for the energy efficient of terahertz signal, by spatially pressing According to the tunable Terahertz cavity resonator structure in the face plate groove waveguides E that certain rule is arranged to make up, have strongly to THz wave Absorbability, opposite E space of planes guide cavity body coupling bandpass filtering generates coupling, can play the role of filtering, can obtain Obtain stronger energy accumulating characteristic.Transmission characteristic using medium side slotted waveguide as bandstop filter, media plate slot wave Tunable Terahertz resonant cavity is led, is hindered by changing accordingly for band logical, band, is reduced terahertz signal and be present in exterior space Radiation loss, have bigger transmission capacity, can effectively prevent the radiation of electromagnetic energy, cause it relative to other types Have the advantages that filter with low insertion loss and high power capacity for filter, it can be real with external Terahertz planar circuit or antenna structure Existing efficient coupling improves the transmitting and received efficiency of terahertz signal.Meanwhile can by adjust metal parallel plate size and Spacing between two media plates, to transmit corresponding Terahertz radiofrequency signal.Adjust media plate waveguide the face E coupling and The size for the resonant cavity that air layer is constituted and the material parameter of media plate waveguide are joined to optimize the transmission of terahertz filter Number, it is more than 95% that Terahertz centre frequency, which has very big tuning range, bandwidth 100GHz, and its Penetration ration,.Due to metal Parallel-plate connects firmly the enclosed construction of media plate waveguide, and the E flank of tooth multiple-grooved band of composition hinders Slab Dielectric Waveguide terahertz filter, In comparison with other forms terahertz filter, it can avoid electromagnetic radiation, power capacity is big.

The utility model can preferably realize the effective interconnection between Terahertz frequency range planar circuit, can be by Terahertz The energy efficient of signal is coupled in inner dielectric layer, obtains stronger energy accumulating characteristic, reduces terahertz signal presence In the radiation loss of exterior space, high efficiency of transmission can be realized with external Terahertz planar circuit or antenna structure.

Detailed description of the invention

Fig. 1 is the main view of the utility model rectangle E flank of tooth multiple-grooved band resistance Slab Dielectric Waveguide terahertz filter.

Fig. 2 is the side view of Fig. 1.

In figure: 1 parallel metal parallel-plate, 2 media plate waveguides, 3 air layers.

Specific embodiment

Refering to fig. 1.Fig. 2.In the embodiment described below, a kind of rectangle E flank of tooth multiple-grooved band hinders Slab Dielectric Waveguide too Hertz filter including two metal parallel plates 1, connects firmly media plate waveguide 2 between metal parallel plate, and is closed in Jie Air layer 3 between matter planar waveguide 2.Two media plate waveguides 2 parallel each other are formed with opposite symmetrical E flank of tooth band resistance up and down Slot, rectangular wave of the THz wave from hole slot one end perception window coupling input of air layer 3, between two parallel media plate waveguides 2 The other end perception window of guide cavity body strap clearance channel couples output, to form the resistance Terahertz filter of rectangle E flank of tooth multiple-grooved band Wave device hinders the Terahertz resonant cavity that slot and air layer 3 are constituted by the E flank of tooth band of media plate waveguide 2 when terahertz signal enters When, can resonate under certain frequency, generate coupling in Terahertz resonant cavity, by change accordingly for band logical, Band resistance, is filtered the terahertz signal of input, frequency-selecting.

According to Terahertz circuit band requirement, frequency passband being determined, selecting suitable media plate waveguide material, utilization is micro- Wave circuit CASE(Computer Aided Software Engineering) establishes the guided wave structure of Fig. 1, sets required transmission characteristic design object, passes through software Optimized Program, so that it is determined that each unit linear electrical parameter.The tooth pitch of the E flank of tooth band resistance slot of two parallel media plate waveguides 2 Identical, transverse tooth thickness is equal, and upper and lower tooth socket, tooth top are symmetrical, and tooth top, tooth root are rectangle.

The configured transmission of waveguide terahertz filter as shown in figure 1 is high by band resistance groove width W1, W2, W3 and tooth of resonant cavity A1, a2, a3, b1, b2, b3 are determined.When terahertz signal enters the resonant cavity being made of media plate waveguide 2 and air layer 3, The resonant cavity can be filtered the terahertz signal of input, frequency-selecting, and realize having between Terahertz frequency range planar circuit Effect interconnection.The utility model can be connected with rectangular waveguide, can also be interconnected with fin line and micro-strip, and then solve work The problem of interconnection is realized in Cheng Yingyong between Terahertz planar circuit.

When hosqt media planar waveguide medium is identical above and below metal parallel plate, it can be divided into according to the difference of Distribution of Magnetic Field Two class of symmetric mode and anti symmetric mode, the former magnetic field amplitude absolute value have part at the intermediate position of the one-dimensional slot of the rectangle E flank of tooth Maximum value, and the latter then has local minimum.By filling silicon in slot, and make the thickness of silicon greater than the thickness of metal parallel plate Degree, can effectively increase transmission range.This method can realize long distance transmission in the case where keeping sub-wavelength constraint, Middle anti symmetric mode has more excellent transmission characteristic.Transverse width by limiting the one-dimensional slot of the rectangle E flank of tooth can be in transverse direction On also realize that sub-wavelength constrains, and long distance transmission can be obtained simultaneously.Transverse width by optimizing slot can obtain most Good restraint performance.Sub-wavelength surface duct can be designed using this structure, and realizes that there is the curved of extremely low bending loss Bent waveguide.

Claims

1. a kind of rectangle E flank of tooth multiple-grooved band hinders Slab Dielectric Waveguide terahertz filter, including two parallel metal parallel-plates (1), the media plate waveguide (2) between metal parallel plate, and the air layer being closed between media plate waveguide (2) are connected firmly (3), it is characterised in that: two media plate waveguides (2) parallel each other are formed with opposite symmetrical E flank of tooth band resistance slot up and down, too Rectangular waveguide of the Hertz wave from hole slot one end perception window coupling input of air layer (3), between two parallel media plate waveguides (2) The other end perception window of cavity strap clearance channel couples output, to form the resistance Terahertz filtering of rectangle E flank of tooth multiple-grooved band Device hinders the Terahertz resonant cavity that slot and air layer (3) are constituted by media plate waveguide (2) E flank of tooth band when terahertz signal enters When, can resonate under certain frequency, generate coupling in Terahertz resonant cavity, by change accordingly for band logical, Band resistance, is filtered the terahertz signal of input, frequency-selecting.

2. rectangle E flank of tooth multiple-grooved band as described in claim 1 hinders Slab Dielectric Waveguide terahertz filter, it is characterised in that: The tooth pitch of the E flank of tooth band resistance slot of two parallel media plate waveguides (2) is identical, and transverse tooth thickness is equal, and upper and lower tooth socket, tooth top are symmetrical, tooth Top, tooth root are rectangle.

3. rectangle E flank of tooth multiple-grooved band as described in claim 1 hinders Slab Dielectric Waveguide terahertz filter, it is characterised in that: The configured transmission of waveguide terahertz filter hinders groove width W1, W2, W3 and tooth high a1, a2, a3, b1, b2, b3 by the band of resonant cavity It determines.