CN109149032A

CN109149032A - A kind of three rank V-band bandpass filters based on ridge gap waveguide

Info

Publication number: CN109149032A
Application number: CN201811004711.0A
Authority: CN
Inventors: 吕凯迪; 花睿; 孙琳琳
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2018-08-30
Filing date: 2018-08-30
Publication date: 2019-01-04

Abstract

The invention discloses a kind of three rank V-band bandpass filters based on ridge gap waveguide, it is a kind of parallel coupling formula bandpass filter.The resonator of parallel coupling bandpass filter is half-wavelength, and each resonator is placed in parallel, and edge is close to intercouple.It is analyzed according to the odd mould idol theory of modules, this coupling effect finally generates pass band filter characteristic, the relative bandwidth of filter of the present invention is wider, Out-of-band rejection, in-band insertion loss, inband flatness and reflection coefficient are better than common V-band bandpass filter, have the advantages that light-weight, simple and compact for structure, high reliablity, performance are stable, processing cost is low etc..

Description

A kind of three rank V-band bandpass filters based on ridge gap waveguide

Technical field

The present invention relates to a kind of V-band filters, more particularly, to a kind of three rank V-bands based on ridge gap waveguide Bandpass filter.

Background technique

For microstrip filter since its size is small, at low cost, it is millimeter wave frequency band that weight is small and low INVENTIONDispersive propagation characteristic Ideal solution.Although in the past decades in, printed circuit board material and circuit printing techniques have very big improvement, But the insertion loss of microstrip filter is still very high, especially in millimeter wave band.This is because radiation leakage when high frequency and The fissipation factor of material.Radiation leakage can be eliminated significantly using Metal Packaging.However, the overall dimensions of filter can become phase When big and heavy.And for the loss factor of frequency medium substrate, although the drain performance of material makes moderate progress, relevant damage Mistake is unacceptable in numerous applications.Therefore, it is necessary to a kind of new plane transverse-electromagnetic technology is growing to meet The demand of millimeter-wave communication system.In addition, it there should be printed circuit technique, and overcome excessive loss characteristic.

Ridge gap waveguide is a kind of millimeter waveguide medium.This technology is to be based on parallel-plate waveguide, is had around dielectric-slab The direction and inhibit radiation leakage that the control of periodic electromagnetism band structure is propagated.Therefore, it realizes the TEM biography for not needing electrical contact Defeated line.In addition, using air as propagation medium, this largely avoids the loss of dielectric material.When frequency reaches When millimeter wave frequency band, rectangular waveguide is undersized, difficulty of processing is big and assembly the problems such as, ridge gap waveguide is excellent in these areas In rectangular waveguide.In millimeter wave frequency band, microstrip line occurs that excessive, the low problems of power capacity are lost, and ridge gap waveguide is excellent In microstrip line.

Currently, ridge gap waveguide is studied on antenna and power splitter part and application is more and more, but in the application of filter On be lacking, how using ridge gap waveguide to realize that high performance filter is that have very much researching value.

Summary of the invention

It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of three rank V-bands based on ridge gap waveguide Bandpass filter has preferable inband flatness and standing wave to realize preferable frequency selection.

Realize the technical solution of the object of the invention are as follows: a kind of three rank V-band bandpass filters based on ridge gap waveguide, packet Input port, output port and three rank Coupled Miccrostrip Lines are included, it is characterised in that three rank Coupled Miccrostrip Lines include The parallel microstrip line of first rank, the parallel microstrip line of second-order microstrip line parallel with third rank, the input port and the first rank are flat By half-wave resonator edge close to intercoupling between row microstrip line, output port micro-strip parallel with third rank it Between by half-wave resonator edge close to intercoupling, microstrip line is nearby periodical mushroom cellular array, the half-wave Long resonator dimensions are L4=3.7mm, L5=0.9mm, W4=0.8mm, W5=1mm, and the input port is parallel with the first rank micro- With 0=0.1mm of clearance G between line, gap is also 0.1mm between output port microstrip line parallel with third rank, described The parallel dimension of microstrip line of the first rank be L1=1.96mm, W1=0.7mm, the parallel dimension of microstrip line of the second-order be L2= 2.00mm, W2=0.7mm, the parallel dimension of microstrip line of third rank are L3=1.98mm, W3=0.7mm, the mushroom-shaped cell Array includes circular patch radius 0.4mm and metallization VIA radius 0.13m.The relative bandwidth of filter of the present invention is wider, band Outer inhibition, in-band insertion loss, inband flatness and reflection coefficient are better than common V-band bandpass filter, with weight Gently, the advantages such as simple and compact for structure, high reliablity, performance are stable, processing cost is low.

Detailed description of the invention

Fig. 1 is filter schematic of the invention.

Fig. 2 is filter simulation result diagram of the invention.

1- mushroom cellular array, 2- output port (transition structure between microstrip line and ridge gap waveguide), 3- in figure The parallel microstrip line of three ranks, the parallel microstrip line of 4- second-order, the parallel microstrip line of the first rank of 5-, 6- input port are (between microstrip line and ridge Transition structure between gap waveguide).

Specific embodiment

Technical solution of the present invention is described in further detail with reference to the accompanying drawing.

A kind of three rank V-band bandpass filters based on ridge gap waveguide combined with Figure 1 and Figure 2, include input port 6, Output port 2 and three rank Coupled Miccrostrip Lines, it is characterised in that three rank Coupled Miccrostrip Lines include that the first rank of 3- is parallel Microstrip line, the parallel microstrip line 4 of second-order microstrip line 5 parallel with third rank, the input port 6 micro-strip parallel with the first rank of 5- Led between the output port 2 micro-strip 3 parallel with third rank by half-wave resonator edge close to intercoupling between line Half-wave resonator edge is crossed close to intercoupling, microstrip line is nearby the hole of periodical mushroom cellular array.The half-wave Long resonator dimensions are L4=3.7mm, L5=0.9mm, W4=0.8mm, W5=1mm, and structure 6 shown in FIG. 1, structure 2 is also half-wave Long resonator, size and structure 6 are identical.0=0.1mm of clearance G between input port microstrip line parallel with the first rank, Gap between structure 6 and structure 5 shown in FIG. 1.Gap is also between output port microstrip line parallel with third rank Gap between 0.1mm structure 2 shown in FIG. 1 and structure 3.The parallel dimension of microstrip line of first rank be L1=1.96mm, W1= 0.7mm, structure 5 shown in FIG. 1.The parallel dimension of microstrip line of the second-order be L2=2.00mm, W2=0.7mm, it is shown in FIG. 1 Structure 4.The parallel dimension of microstrip line of third rank is L3=1.98mm, W3=0.7mm, structure 3 shown in FIG. 1.Periodical mushroom Mushroom cellular array is one of the basic module of ridge gap waveguide, adds one layer of parallel metal sheet above, parallel-plate TEM is consequently formed Waveguide.The mushroom molded dimension is as follows: circular patch radius R=0.4mm, metallization VIA radius r=0.13mm, and medium substrate is thick Spend t=0.381mm, unit period p=0.9mm, r=3.0 medium substrate relative dielectric constant ε, structure 1 shown in FIG. 1.It is mushroom-shaped Unit is processed on dielectric-slab, and plank Bottom ground is most important, and institute's plating metal through-hole is able to suppress field inside dielectric-slab Propagation.

Claims

1. a kind of three rank V-band bandpass filters based on ridge gap waveguide, it is characterised in that: include input port, output Port and three rank Coupled Miccrostrip Lines, it is characterised in that three rank Coupled Miccrostrip Lines include the parallel microstrip line of the first rank, The parallel microstrip line of second-order microstrip line parallel with third rank passes through half between input port microstrip line parallel with the first rank Wave resonator edge passes through half-wave resonator between output port micro-strip parallel with third rank close to intercoupling Close to intercoupling, microstrip line is nearby periodical mushroom cellular array at edge.

2. a kind of three rank V-band bandpass filters based on ridge gap waveguide, it is characterised in that the half-wave resonator ruler Very little is L4=3.7mm, L5=0.9mm, W4=0.8mm, W5=1mm.

3. a kind of three rank V-band bandpass filters based on ridge gap waveguide, it is characterised in that the input port and first 0=0.1mm of clearance G between the parallel microstrip line of rank, gap is also between output port microstrip line parallel with third rank 0.1mm。

4. a kind of three rank V-band bandpass filters based on ridge gap waveguide, it is characterised in that the parallel micro-strip of the first rank Linear dimension is L1=1.96mm, W1=0.7mm.

5. a kind of three rank V-band bandpass filters based on ridge gap waveguide, it is characterised in that the parallel micro-strip of the second-order Linear dimension is L2=2.00mm, W2=0.7mm.

6. a kind of three rank V-band bandpass filters based on ridge gap waveguide, it is characterised in that the parallel micro-strip of third rank Linear dimension is L3=1.98mm, W3=0.7mm.

7. a kind of three rank V-band bandpass filters based on ridge gap waveguide, it is characterised in that the mushroom-shaped cellular array packet Include circular patch radius 0.4mm and metallization VIA radius 0.13mm.