CN201178125Y - A dual-mode ellipse response filter of substrate integration waveguide - Google Patents
A dual-mode ellipse response filter of substrate integration waveguide Download PDFInfo
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- CN201178125Y CN201178125Y CNU2008200307575U CN200820030757U CN201178125Y CN 201178125 Y CN201178125 Y CN 201178125Y CN U2008200307575 U CNU2008200307575 U CN U2008200307575U CN 200820030757 U CN200820030757 U CN 200820030757U CN 201178125 Y CN201178125 Y CN 201178125Y
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Abstract
A substrate integrated wave-guide double-module elliptical response filter adopts two double-module single cavities of different sizes. The upper and the lower surfaces of a medium substrate (1) is respectively coated with an upper surface metal layer (7) and a lower surface metal layer (8); a metallized through-hole array (2) passes through the medium substrate (1), the upper surface metal layer (7) and the lower surface metal layer (8); a cavity body (3) with a rectangle structure is enclosed by the metallized through-hole array (2); a first inductive coupling hole (61) and a second inductive coupling hole (62) for leading energy in and out of the cavity are respectively formed on two sides opposite to the cavity body (3) with the rectangle structure; a first metallized through-hole array (4) and a second metallized through-hole array (5) are respectively arranged outside the first inductive coupling hole (61) and the second inductive coupling hole (62) for corresponding to the input and the output of the cavity body of the filter, so that both are collinearly distributed and connected to an external circuit, and also can be connected to a microstrip line or other substrate integrated wave-guide devices.
Description
Technical field
The utility model relates to a kind of millimeter wave filter, this filter uses substrate integration wave-guide (SubstrateIntegrated Waveguide SIW) bimodulus cavity to realize, characteristics with ellipse response, be specially adapted to high frequency, low-loss, high integration, and the application scenario that selectivity is had higher requirements.
Background technology
Filter is one of important basic element circuit of Circuits System, and its performance all has material impact to the selectivity of entire system, noise factor, gain, sensitivity etc.Commonly used in the microwave and millimeter wave circuit have based on the filter of metal waveguide with based on the filter of planar circuits such as microstrip line, complanar line.Usually have advantages such as high Q value, low-loss, selectivity be better based on the filter of metal waveguide, but its requirement on machining accuracy height, cost height, volume are big, difficult integrated with active circuit.Though and easily integrated based on the filter of planar circuit technology such as microstrip line, complanar line with active circuit, the bigger radiation of existence usually, loss is big, the Q value is low, poor-performing.Substrate integrated waveguide technology has the advantage such as easy of integration, easy to make of planar circuit, has the premium properties approximate with the metal waveguide filter again.Because frequency spectrum resource is limited, Modern Communication System has proposed more and more higher requirement to the selectivity of filter.Ellipse response filter is undoubtedly a kind of preferential selection.The common method that realizes elliptic filter is to utilize cross-couplings, produces transmission zero.But this method design is complicated, implements also relatively difficulty.
Summary of the invention
Technical problem: the purpose of this utility model is to propose a kind of dual-mode ellipse response filter of substrate integration waveguide, it has adopted substrate integrated waveguide technology, single layer structure, processing realizes simple, volume is little, the integrated level height, on the other hand, it has adopted the rectangular bimodule cavity to realize ellipse response, and Insertion Loss is smaller, excellent performance, and design is also very convenient.
Technical scheme: the utility model provides a kind of double mould cavity fluid filter with ellipse response, mainly based on substrate integrated waveguide technology and bimodulus theory, is fit to very much be applied to millimeter wave field.
The utility model adopts following technical scheme:
This bimodulus cavity ellipse response filter has adopted two bimodulus list chambeies that size is different, to obtain the bilateral ellipse response that falls suddenly, each single chamber zero point of contribution and two limits; It has adopted the sheet Integrated Waveguide Technology each single chamber, upper and lower surface at dielectric substrate is covered with upper surface metal level and lower surface metal layer respectively, the plated-through hole array is through dielectric substrate, upper surface metal level and lower surface metal layer, surround the cavity of rectangular configuration by the plated-through hole array, be respectively equipped with the first inductive coupled hole, the second inductive coupled hole in the relative both sides of the cavity of rectangular configuration and energy introduced and derived cavity; The first plated-through hole array and the second plated-through hole array are located at respectively outside the first inductive coupled hole, the second inductive coupled hole, input and output corresponding to filter cavity, two are the conllinear distribution, are connected to external circuit by them, can be even to microstrip line or other substrate integration wave-guide device.The size of the cavity of rectangular configuration, structure, comprise long and wide, length-width ratio, the position of control filters zero point and limit independently, this brings great convenience to design.
For the situation of transmission zero on the left side, the width a in the first inductive coupled hole is 2.62mm, and the width b in the second inductive coupled hole is 4.587mm.For the situation of transmission zero on the left side, the width a in the first inductive coupled hole is 2.62mm, and the width b in the second inductive coupled hole is 4.587mm.
For the situation of transmission zero on the left side, the long limit width of the cavity of rectangular configuration is 10.46mm, and the long length of minor face is 5.51mm.For transmission zero situation on the right, the long limit width of the cavity of rectangular configuration is 9.76mm, and the long length of minor face is 5.73mm.
The diameter vr of plated-through hole is 0.3mm, and the spacing vs of adjacent through-holes is 0.6mm.Dielectric thickness is 0.5mm, and dielectric constant is 2.2.
Beneficial effect:
1. this filter possesses good ellipse response characteristic, and good selectivity is arranged, and last lower sideband response ratio is symmetry.
2. this filter has less Insertion Loss, adopt the bimodulus structure, only used two cavitys just to realize four limits and two controlled zero points, and traditional cross-couplings ellipse response cavity body filter is realized can bringing bigger Insertion Loss thus by same four cavitys of performance need.Filter cavity has bigger no-load quality factor for main mould, therefore can further less loss.
3. this filter has adopted the single substrate integrated wave guide structure, realize very simply, make and all to utilize ripe standard industry technologies, the low and precision height of cost, integrated with active planar circuit easily, this is a very big advantage for the metal waveguide filter.
4. this Design of Filter is very simple, but two bimodulus cavity independent design, and pole and zero is controlled respectively by cavity, has avoided the design process of the complexity of cross-couplings elliptic filter.
5. the filter upper and lower surface links to each other by plated-through hole, and ground connection and isolation are convenient, realizes easily between the input and output isolating fully.As resonator, eliminated radiation loss with substrate integrated wave-guide cavity wave substantially, the loss of filter is far below the filter based on little band and complanar line.
Description of drawings
Fig. 1 is substrate integration wave-guide dual mode filter list cavity configuration figure, and wherein Fig. 1 (a) is a front view, and Fig. 1 (b) is a lateral plan.
Fig. 2 is substrate integration wave-guide dual mode filter list chamber transmission characteristic and mode electric field figure, the cavity size key diagram.
Fig. 3 is 1 liang of chamber of embodiment bimodulus mode filter structure chart.
Fig. 4 is embodiment filter transmission characteristic figure, and wherein dotted line is a test result, and solid line is a simulation result.
Have among the above figure: the cavity 3 of dielectric substrate 1, plated-through hole array 2, rectangular configuration, the first plated-through hole array 4,61, the second inductive coupled hole 62, the second plated-through hole array, 5, the first inductive coupled hole, upper surface metal level 7, lower surface metal layer 8.
Embodiment
This bimodulus cavity ellipse response filter has adopted two bimodulus list chambeies that size is different, to obtain the bilateral ellipse response that falls suddenly, each single chamber zero point of contribution and two limits.The structure in single chamber as shown in Figure 1, it has adopted substrate integrated waveguide technology, comprise dielectric substrate 1, upper surface metal level 7, the lower surface metal layer 8 of applying in dielectric substrate 1 upper and lower surface, and through the upper surface metal level 7 of double layer of metal face up and down, the plated-through hole array 2 of lower surface metal layer 8.The cavity 3 of rectangular configuration is the rectangular configuration of standard, and cavity is introduced energy and derive in 61, the second inductive coupled hole 62, the first inductive coupled hole.The first plated-through hole array 4, the second plated-through hole array 5 correspond respectively to the input and output of filter cavity, two are conllinear and distribute, connect to external circuit by them, can be even to microstrip line or other substrate integration wave-guide device, this via-hole array can also suppress entering of low order pattern.The used pattern of this filter is TE
103Mould and TE
201Mould.Fig. 2 showed single cavity transmission characteristic and and the electric field intensity map of used pattern, TE
102Mould linearly distributes because of the filter input and output and the zero electric field place that just in time is positioned at this pattern can be fallen by good restraining.By suitable adjusting cavity size, can very easily transmission zero be moved to upper sideband or lower sideband, zero limit can independently be controlled by cavity.
The Design of Filter material object as shown in Figure 3.Bimodulus cavity 31 shown in Figure 1, test usefulness or company are to the little band and the transition line 32 thereof of external circuit, perceptual aperture-coupled window 33.Whole filter is arranged by two rectangular bimodule cavity line straight lines and formed, and is smaller and more exquisite, removes the microstrip line and the transition line thereof of test usefulness, and filter itself is very little.Substrate has adopted Rogers5880, and dielectric constant is 2.2, thick 0.5mm.Two each responsible bands of different cavitys transmit zero point and two band inpolars outward, debug more convenient.The actual measurement transmission characteristic of filter is shown in Fig. 4 dotted line, actual measurement return loss is better than-11.5dB, Insertion Loss is approximately 2.92dB in the band, this loss is to have comprised test splice, the influence of microstrip-fed line and transition line, these losses still are apparent in view at the Ka wave band, deduct this part loss, the active loss of filter can be littler, should be less than 2dB.The centre frequency of designed filter is 35GHz, and the actual measurement bandwidth is about 2GHz, can find that test result and simulation result are more identical, and main difference is that bandwidth a bit becomes greatly, and this should be that chamber hole location, the left side is forbidden to cause.The selectivity of filter is very good, just dropped to very soon-below the 20dB, this is typical elliptic filter feature.
Claims (3)
1. a dual-mode ellipse response filter of substrate integration waveguide is characterized in that this bimodulus cavity ellipse response filter has adopted two bimodulus list chambeies that size is different, to obtain the bilateral ellipse response that falls suddenly, each single chamber zero point of contribution and two limits; It has adopted the sheet Integrated Waveguide Technology each single chamber, be covered with upper surface metal level (7) and lower surface metal layer (8) respectively on the upper and lower surface of dielectric substrate (1), plated-through hole array (2) is through dielectric substrate (1), upper surface metal level (7) and lower surface metal layer (8), surround the cavity (3) of rectangular configuration by plated-through hole array (2), be respectively equipped with the first inductive coupled hole (61), the second inductive coupled hole (62) in the relative both sides of cavity (3) of rectangular configuration and energy introduced and derived cavity; The first plated-through hole array (4) and the second plated-through hole array (5) are located at respectively outside the first inductive coupled hole (61), the second inductive coupled hole (62), input and output corresponding to filter cavity, two are conllinear and distribute, connect to external circuit by them, can be even to microstrip line or other substrate integration wave-guide device.
2. dual-mode ellipse response filter of substrate integration waveguide according to claim 1, the width a that it is characterized in that the first inductive coupled hole (61) is 2.62mm, the width b in the second inductive coupled hole (62) is 4.587mm.
3. dual-mode ellipse response filter of substrate integration waveguide according to claim 1, the diameter vr that it is characterized in that plated-through hole array (2) is 0.3mm, the spacing vs of adjacent through-holes is 0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200307575U CN201178125Y (en) | 2008-01-11 | 2008-01-11 | A dual-mode ellipse response filter of substrate integration waveguide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200307575U CN201178125Y (en) | 2008-01-11 | 2008-01-11 | A dual-mode ellipse response filter of substrate integration waveguide |
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| CN201178125Y true CN201178125Y (en) | 2009-01-07 |
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| CNU2008200307575U Expired - Lifetime CN201178125Y (en) | 2008-01-11 | 2008-01-11 | A dual-mode ellipse response filter of substrate integration waveguide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217207B (en) * | 2008-01-11 | 2011-02-09 | 东南大学 | A dual-mode ellipse response filter of substrate integration waveguide |
| CN116207464A (en) * | 2023-04-23 | 2023-06-02 | 南通至晟微电子技术有限公司 | Dual-mode substrate integrated waveguide resonator |
-
2008
- 2008-01-11 CN CNU2008200307575U patent/CN201178125Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217207B (en) * | 2008-01-11 | 2011-02-09 | 东南大学 | A dual-mode ellipse response filter of substrate integration waveguide |
| CN116207464A (en) * | 2023-04-23 | 2023-06-02 | 南通至晟微电子技术有限公司 | Dual-mode substrate integrated waveguide resonator |
| CN116207464B (en) * | 2023-04-23 | 2023-10-31 | 南通至晟微电子技术有限公司 | Dual-mode substrate integrated waveguide resonator |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090107 Effective date of abandoning: 20080111 |