CN105789780A - Multimode resonator based microstrip filter with adjustable trapped waves - Google Patents
Multimode resonator based microstrip filter with adjustable trapped waves Download PDFInfo
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- CN105789780A CN105789780A CN201410827599.6A CN201410827599A CN105789780A CN 105789780 A CN105789780 A CN 105789780A CN 201410827599 A CN201410827599 A CN 201410827599A CN 105789780 A CN105789780 A CN 105789780A
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Abstract
The invention discloses a multimode resonator based microstrip filter with adjustable trapped waves. The filter comprises an open-circuit-stub microstrip structure (100) and two microstrip feeder line structures (106), wherein the open-circuit-stub microstrip structure comprises stub lines (101) and (102), two microstrip transmission lines (103) and a combined type groove (107). The filter realizes the adjustable trapped waves through an interdigital coupling structure formed by the combined type transmission lines; the filter disclosed by the invention has a good multimode resonance characteristic, and the required trapped waves can be obtained by changing the length, width and gaps of the interdigital coupling structure; and meanwhile, the filter is simple in design, and a foldable structure is adopted, so that the filter is compact in structure, convenient to process, low in cost and capable of adjusting the trapped waves.
Description
Technical field
The present invention relates to a kind of adjustable microstrip filter of the trap based on multimode resonator, it is adjustable that this wave filter can realize trap in UWB.
Background technology
UWB technology comes across late 1950s, until the nineties in 20th century is all mainly used in military radar and the communication system of low intercepting and capturing rate.In recent years, along with the development of microelectronic component technology and technique, UWB technology just starts progressively to be applied in civil area.On February 14th, 2002, ultrawideband obtains the approval of FCC FCC first, can be used in short-distance wireless communication, this commercial applications being super-broadband tech product opens gate, radio ultra wide band system and device thereof such as UWB wave filter are promoted, UWB antenna, the progress of research such as UWB amplifier.
Super-broadband tech field applicatory is very extensive, and for the ease of management, radio ultra wide band system is divided into 3 classes by FCC: imaging system, penetrates imaging system, supervision system and medical imaging system including ground-penetrating radar system, wall imaging system, wall；Vehicular radar system；Indoor ultra-broadband system
In recent years, along with the fast development of wireless communication technology and multimedia service, ultra broadband (UWB) technology is subject to people in the world and more and more payes attention to.UWB system is fast with its transmission speed, low in energy consumption, system is simple, strong security and capacity of resisting disturbance is strong etc. that advantage is with a wide range of applications and huge market value.Meanwhile, it also be we have proposed more challenge, because existing most communication systems are operated in same frequency range, mutual interference problem will have to consider.One of critical component as RF communication system, UWB wave filter will directly influence the performance of whole ultra-wideband communication system, and therefore, its performance quality is most important.
Occur in that some mentalities of designing in recent years, such as multimode resonator (MMR), via structure etc., although but these structures can realize trap effect, but trap is non-adjustable.Or introducing difference refers to the line of rabbet joint, it is achieved double; two trap characteristics, although bandwidth is adjustable, but the trap of ultra-wide band filter is non-adjustable.
In the commercial scope of FCC definition, UWB signal is likely to be subject to the interference of the signals such as such as WiAX (3.5-GHz), WLAN (5.15-5.825GHz), RFID (6.8GHz).How to solve co-channel interference and become UWB research important content, the therefore adjustable important indicator becoming transversal filter performance of trap.
Summary of the invention
It is an object of the invention to provide volume in little, compact conformation, it is simple to the integrated adjustable wave filter in broadband with interconnection, this wave filter can reduce the WLAN signal interference to UWB signal, it is possible to for radio frequency network leading portion, it is achieved good communication.
The technical solution adopted in the present invention:
A kind of adjustable microstrip filter of the trap based on multimode resonator, microstrip structure (100) including the open circuit counterfoil being formed at dielectric-slab upper surface, two microstrip feed line structures (106), the microstrip structure of affiliated open circuit counterfoil includes stub (101), (102), two microstrip transmission lines (103), combinations grooved (107).
Described a kind of adjustable microstrip filter of the trap based on multimode resonator, it is characterised in that there is the microstrip feed line structure (106) of two transmission coupled microstrip line (104) (105), produce trap characteristic；By regulating the length of transmission coupled microstrip line, it is achieved trap is adjustable；And transmission coupled microstrip line (104), (105) are equal with the gap of microstrip transmission line (103).
Described a kind of adjustable microstrip filter of the trap based on multimode resonator, it is characterized in that, combined transmission coupling line (103), (104), (105) for open circuit toe structure, the gap between the width of every transmission coupling line with each transmission coupling line is equal.
Described a kind of adjustable microstrip filter of the trap based on multimode resonator, it is characterized in that, multimode resonator is by microstrip transmission line (103) and (104), (105) the toe coupled structure formed and paster (106) are constituted, and produce adjustable trap by the length and gap adjusting microstrip transmission line.
Described a kind of adjustable microstrip filter of the trap based on multimode resonator, it is characterised in that under the situation adjusting combined groove (107), do not affect trap frequency；Microstrip line counterfoil length (101), the adjustment of (102), nor affect on free transmission range, it may be achieved non-interfering characteristic adjustable with trap that passband is adjustable, it is achieved the compatibility of ultra-wideband communications and narrow-band communication system.
This invention wave filter has following characteristic and advantage relative to existing wave filter:
Design is simple, compact conformation, easy to process, with low cost, trap is adjustable.
Adjustable trap can be produced by adjusting open circuit counterfoil loading structure and multimode resonator size.
By regulating the gap of combined transmission coupling line, it is achieved trap is adjustable.
Accompanying drawing explanation
Fig. 1 is the basic structure top view of the invention process example 1；
Fig. 2 is the basic structure side view of the invention process example 1；
Fig. 3 is the simulation result figure of the invention process example 1；
Detailed description of the invention
The present invention devises a kind of adjustable microstrip filter of the trap based on multimode resonator, and this wave filter adopts foldable structure, and trap is adjustable.
Specifically invention is described in more detail below in conjunction with accompanying drawing:
An example of the present invention is as it is shown in figure 1, medium substrate (108) is dielectric constant is the RT/duroid-6006 of 6.15.The thickness of this medium substrate is 635um.Metal ground plate (109) under medium substrate adopts copper product.
As it is shown in figure 1, the present invention is based on the adjustable microstrip filter of trap of multimode resonator, the microstrip structure (100) of the open circuit counterfoil on medium substrate, two microstrip feed line structures (106), adopt copper product.
As it is shown in figure 1, the present invention is based on the adjustable microstrip filter of trap of multimode resonator, open circuit counterfoil structure includes stub (101), (102), transmission microstrip line (103), combination grooved (107).
As shown in Figure 1, the present invention is based on the adjustable microstrip filter of trap of multimode resonator, and its multimode resonator is microstrip feed line structure (106), by microstrip transmission line (104), (105) and paster composition, multimode resonator realize the adjustable characteristic of trap.
This invention is based on the design parameter of the adjustable microstrip filter of trap of multimode resonator:
The selection of medium substrate: relative dielectric constant is the RT/duroid6006 material of 6.15, RT/duroid6006 material has that electrical insulation capability is stable, flatness good, smooth surface, feature without pit, thickness deviation standard, its excellent electrical properties, operating temperature is higher, performance own is affected by environment little, it is common used material, it is simple to make and commercial production.Microband paste on medium substrate and the metal ground plate under medium substrate all adopt copper product.
The design of multimode resonator: according to wave filter correlation theory, design meets the toe structure resonance unit of ultra-wideband communications and contains rectangle loading counterfoil.Load counterfoil and gap thereof by adjusting rectangle, adjust passband position, it is achieved the adjustable characteristic of trap.
Open circuit counterfoil loading structure design: according to micro-strip transmission theory, design the size of open circuit counterfoil loading structure, produce adjustable notch filter.
Claims (5)
1. the adjustable microstrip filter of the trap based on multimode resonator, microstrip structure (100) including the open circuit counterfoil being formed at dielectric-slab upper surface, two microstrip feed line structures (106), the microstrip structure of affiliated open circuit counterfoil includes stub (101), (102), two microstrip transmission lines (103), combinations grooved (107).
2. a kind of adjustable microstrip filter of the trap based on multimode resonator according to claim 1, it is characterized in that, there is the microstrip feed line structure (106) of two transmission coupled microstrip line (104) (105), produce trap characteristic；By regulating the length of transmission coupled microstrip line, it is achieved trap is adjustable；And transmission coupled microstrip line (104), (105) are equal with the gap of microstrip transmission line (103).
3. a kind of adjustable microstrip filter of the trap based on multimode resonator according to claim 1, it is characterized in that, combined transmission coupling line (103), (104), (105) for open circuit toe structure, the gap between the width of every transmission coupling line with each transmission coupling line is equal.
4. a kind of adjustable microstrip filter of the trap based on multimode resonator according to claim 1 and 2, it is characterized in that, multimode resonator is by microstrip transmission line (103) and (104), (105) the toe coupled structure formed and paster (106) are constituted, and produce adjustable trap by the length and gap adjusting microstrip transmission line.
5. a kind of adjustable microstrip filter of the trap based on multimode resonator according to claim 2 and 4, it is characterised in that under the situation adjusting combined groove (107), do not affect trap frequency；Microstrip line counterfoil length (101), the adjustment of (102), nor affect on free transmission range, it may be achieved non-interfering characteristic adjustable with trap that passband is adjustable, it is achieved the compatibility of ultra-wideband communications and narrow-band communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827599.6A CN105789780A (en) | 2014-12-26 | 2014-12-26 | Multimode resonator based microstrip filter with adjustable trapped waves |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827599.6A CN105789780A (en) | 2014-12-26 | 2014-12-26 | Multimode resonator based microstrip filter with adjustable trapped waves |
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| CN105789780A true CN105789780A (en) | 2016-07-20 |
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| CN201410827599.6A Pending CN105789780A (en) | 2014-12-26 | 2014-12-26 | Multimode resonator based microstrip filter with adjustable trapped waves |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876846A (en) * | 2015-12-12 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of adjustable microstrip filter of trap based on multimode resonator |
| CN107681235A (en) * | 2017-10-10 | 2018-02-09 | 成都大学 | A kind of compact-sized ultra wide band bandpass filter |
-
2014
- 2014-12-26 CN CN201410827599.6A patent/CN105789780A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876846A (en) * | 2015-12-12 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of adjustable microstrip filter of trap based on multimode resonator |
| CN107681235A (en) * | 2017-10-10 | 2018-02-09 | 成都大学 | A kind of compact-sized ultra wide band bandpass filter |
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Application publication date: 20160720 |