CN202550035U - Ultra-wideband filter integrated with double cross-shaped stepped impedance tuning bar - Google Patents
Ultra-wideband filter integrated with double cross-shaped stepped impedance tuning bar Download PDFInfo
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- CN202550035U CN202550035U CN201120518398XU CN201120518398U CN202550035U CN 202550035 U CN202550035 U CN 202550035U CN 201120518398X U CN201120518398X U CN 201120518398XU CN 201120518398 U CN201120518398 U CN 201120518398U CN 202550035 U CN202550035 U CN 202550035U
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Abstract
The utility model relates to an ultra-wideband filter integrated with a double cross-shaped stepped impedance tuning bar, which comprises a multi-mode resonant cavity, a loaded double cross-shaped stepped impedance tuning bar (11), and a pair of toe-crossing type coupling structures symmetrically distributed about a central axis. The multi-mode resonant cavity is formed by full-wavelength micro-strip lines (31), a pair of small circular loading stubs (30) symmetrically distributed about the central axis, and a large circular loading stub (32). Each toe-crossing type coupling structure is formed by three parallel coupling feeders (51) and port connection feeders (50) placed in a toe-crossing shape. The dual-passband ultra-wideband filter has the advantages of compact structure, small size, easy machining, low manufacturing price, wide application range and the like.
Description
Technical field
The utility model relates to the ultra-wide band filter of the impedance-tumed rod of a kind of integrated diesis shape scalariform; This ultra-wide band filter has good broadband character; Good omnidirectional radiation characteristic; And have two trap characteristics, the design of ultra-wide band filter and the impedance-tumed excellent filter of diesis shape scalariform are combined, thereby realize the communication for coordination of radio ultra wide band system and narrowband systems.
Background technology
Along with wireless communication technology and the professional develop rapidly of radio multimedium, ultra broadband (UWB) technology receives more and more researchers' concern.Ultra broadband has boundless application prospect and quite huge market value with advantages such as its two-forty, low-power consumption, high security and antijamming capability are strong.US Federal Communication Committee (FCC) has ratified the application of super-broadband tech in the short-distance wireless communication field in February, 2002.This has opened the gate for the commercial applications of super-broadband tech product, has promoted radio ultra wide band system and device progress of research thereof.According to the regulation of FCC, the frequency band that the indoor ultra-broadband communication system is used is 3.1GHz～10.6GHz.
Yet because ultra-wideband communications occupied frequency band too wide (3.1GHz is to 10.6GHz); In this frequency range, there have been some conventional communications; For example: as be used for the C-band and the X-band of satellite communication, wireless lan (wlan) and broadband intercommunication microwave insert (WiMAX).How solving with disturbing frequently becomes UWB research important content, and the ultra-wide band filter of band indentation becomes key.The traditional design method of UWB filter many passbandizations is the cascade of a plurality of filters, has increased system bulk and design cost, is prone to cause the mismatch between parts simultaneously, reduces the efficient of system.
Some new mentalities of designing have appearred in recent years, like defect ground structure, via structure or multilayer LTCC structure, though certain technological progress is arranged, be short of to some extent aspect the key technology key element such as, stopband integrated at systematic large-scale be adjustable arbitrarily.So having the bilateral band ultra-wide band filter of adjustable indentation stopband, design has great importance.
The utility model content
The ultra-wide band filter of the impedance-tumed rod of a kind of integrated diesis shape scalariform; It is characterized in that: it comprises metal micro-strip paster (10) and the metal ground plate (40) that is formed at the upper and lower surface of dielectric-slab; Said metal micro-strip paster comprises the diesis shape scalariform impedance resonance rod (11) of a multimode cavity and a loading open circuit, and wherein multimode cavity is to be made up of the microstrip line (31) of all-wave length and an additional great circle (32) and 2 roundlets (30) loading counterfoil.
A kind of ultra-wide band filter of integrated diesis shape scalariform impedance resonance rod; It is characterized in that; The microstrip line (31) that all-wave is long and three additional circular loadings between the counterfoil connect with one group of toe electric capacity; The width of every toe of toe electric capacity equates that with gap between each toe three circles that vary in size load and loaded a diesis shape scalariform impedance resonance rod (11) under the counterfoil.
The microstrip line that above-mentioned all-wave is long and three additional annulus load between the counterfoil and connect with one group of toe electric capacity.
The width of every toe of above-mentioned toe electric capacity equates with gap between each toe.
It is with middle axial symmetry that above-mentioned three annulus load, but size inequality.
The above-mentioned loading at three annulus loads the impedance-tumed rod of scalariform under the counterfoil.Realize the adjusting of bilateral band through the impedance-tumed rod of the scalariform that loads.
The utility model has following advantage and characteristic with respect to prior art:
(1) compact conformation, size are little, are easy to processing, and make low price.
(2) in the center frequency point of fixed filters passband, can regulate the passband size of filter through the number that changes toe electric capacity.
(3) through changing the size that toe electric capacity and three annulus load counterfoil, the size that perhaps changes the dielectric constant of dielectric-slab can be adjusted size and the position of center frequency point of the passband of filter.
(4) can adjust the position of the indentation stopband of generation through the size that changes the impedance-tumed rod of scalariform.
Description of drawings
The basic structure vertical view of the ultra-wide band filter of the impedance-tumed rod of Fig. 1 diesis shape scalariform;
Embodiment
In recent years, multimode annulus resonance begins to be applied in the design of microstrip bandpass filter, and this type filter makes full use of the characteristic that in passband, presents a plurality of modes of resonance, realizes that multimode annulus resonance filter has many passbands ultra wideband.Compare with other bilateral ultra-wide band filter, this Filter Structures is compact, is easy to processing, and is applied widely, is expected in ultra broadband (Ultra-Wide Bandwidth) wireless technology, be applied.The utility model really utilizes the multi resonant of the resonance structure characteristic of shaking, and has designed a kind of low cost, high-performance, the ultra-wide band filter that the scope of application is wider.
Below in conjunction with accompanying drawing the concrete structure of the utility model is done further to describe.
An instance of the utility model is as shown in Figure 1, is made up of multimode cavity, the impedance-tumed rod of diesis shape scalariform (11), toe type coupled structure.Closely link to each other between impedance-tumed excellent two structures of multimode cavity and diesis shape scalariform; Its two parts can be interacted; The toe coupled structure is connected feeder line (50) by three parallel coupling feed (51) that are placed to the toe type and constitutes with port; According to shown in structure, as long as select suitable dimensions, just can satisfy the characteristic of its ultra broadband and arrowband collaborative work.
The selection of medium substrate: generally between 2-9.8, the dielectric constant that the utility model adopts is 2.65 polyfluortetraethylene plate to the dielectric constant of medium substrate, and this substrate price is lower, and loss is less, based on above-mentioned requirements.In reality, can adopt the little medium substrate of dielectric constant loss angle according to practical application, like the dielectric constant loss angle less than 10
-3Substrate.The thickness of the medium substrate that the utility model adopts is 1.6mm, satisfies required intensity.
The design of multimode cavity: in recent years; Multimode annulus resonance begins to be applied in the design of microstrip bandpass filter; This type filter makes full use of the characteristic that in passband, presents a plurality of modes of resonance, realizes that multimode annulus resonance filter has many passbands ultra wideband.Compare with other bilateral ultra-wide band filter, this Filter Structures is compact, is easy to processing, and is applied widely, is expected in ultra broadband (Utra-Wide Bandwidth) wireless technology, be applied.
The resonance portion of whole filter is made up of multimode cavity, the impedance-tumed rod of diesis shape scalariform (11).In order to reduce the volume of filter, microstrip line is folded up.This design not only makes Filter Structures more compact, more can well realize communication.This filter can not only be realized the ultra-wideband communications of 3.1G to 10.6G, and trap characteristic is arranged, and the signal in the frequency band influenced by out of band signal less, help the EMC Design of system or equipment.This Filter Structures is simple simultaneously, volume is little, is printed on the two sides of medium substrate, be convenient to produce in batches, and debugging, and with low cost.
Claims (2)
1. the ultra-wide band filter of the impedance-tumed rod of integrated diesis shape scalariform; It is characterized in that: it comprises multimode cavity and a diesis shape scalariform impedance resonance rod that loads open circuit, and wherein multimode cavity is to be made up of with three additional circular counterfoils that load the long microstrip line of all-wave.
2. according to the ultra-wide band filter of the impedance-tumed rod of the said a kind of integrated diesis shape scalariform of claim 1; It is characterized in that; The microstrip line that all-wave is long and three additional circular loadings between the counterfoil connect with one group of toe electric capacity; The width of every toe of toe electric capacity equates that with gap between each toe three circles that vary in size load under the counterfoil and loaded an impedance-tumed rod of diesis shape scalariform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120518398XU CN202550035U (en) | 2011-12-10 | 2011-12-10 | Ultra-wideband filter integrated with double cross-shaped stepped impedance tuning bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120518398XU CN202550035U (en) | 2011-12-10 | 2011-12-10 | Ultra-wideband filter integrated with double cross-shaped stepped impedance tuning bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202550035U true CN202550035U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120518398XU Expired - Fee Related CN202550035U (en) | 2011-12-10 | 2011-12-10 | Ultra-wideband filter integrated with double cross-shaped stepped impedance tuning bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202550035U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157935A (en) * | 2014-07-04 | 2014-11-19 | 电子科技大学 | Microstrip UWB band-pass filter with superimposable notch property |
-
2011
- 2011-12-10 CN CN201120518398XU patent/CN202550035U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157935A (en) * | 2014-07-04 | 2014-11-19 | 电子科技大学 | Microstrip UWB band-pass filter with superimposable notch property |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20131210 |