CN105762454A - Inverted-T-shaped loading stub based trapped wave adjustable UWB filter - Google Patents
Inverted-T-shaped loading stub based trapped wave adjustable UWB filter Download PDFInfo
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- CN105762454A CN105762454A CN201410798620.4A CN201410798620A CN105762454A CN 105762454 A CN105762454 A CN 105762454A CN 201410798620 A CN201410798620 A CN 201410798620A CN 105762454 A CN105762454 A CN 105762454A
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Abstract
The invention discloses an inverted-T-shaped loading stub based trapped wave adjustable UWB filter. The filter is composed of a medium substrate (101), a micro-strip transmission line (102), a multimode resonator (103), an open circuit stub loading structure (104), a via hole (105) and a ground face (106). According to the invention, the inverted-T-shaped loading stub is utilized for realizing solitary trapped wave and the trapped wave is adjustable. The filter has good solitary trapped wave features and the trapped wave is around 5.8 Ghz. Interference on the UWB filter caused by WLAN signals can be removed. The filter is simple in design, compact in structure, convenient to process, low in cost, adjustable in passband and adjustable in trapped wave.
Description
Technical field
The present invention relates to a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape, this wave filter can filter the interference of WLAN signal 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 extremely
Close important.
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 solving co-channel interference and become UWB research important content, the wave filter therefore with trap characteristic has significantly high practical value.
Summary of the invention
It is an object of the invention to provide volume in little, compact conformation, it is simple to the integrated ultra broadband list notch filter 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 UWB wave filter of trap loading counterfoil based on inverted T shape, including: medium substrate (101), microstrip transmission line (102), multimode resonator (103), open circuit counterfoil loading structure (104), via (105), ground plane (106).
Described a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape, it is characterised in that described multimode resonator is loaded counterfoil (1031) by inverted T shape, rectangle resonant ring (1032) forms.
Described a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape, it is characterised in that open circuit counterfoil loading structure, multimode resonator, microstrip transmission line structure are all printed on dielectric-slab upper surface.Described via is connected through dielectric-slab with open circuit counterfoil loading structure and ground plane.Ground plane is positioned at dielectric-slab lower surface.
Described a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape, it is characterised in that open circuit counterfoil loading structure is positioned at above multimode resonator, is connected with multimode resonator.
Described a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape, it is characterised in that inverted T shape loads counterfoil and is connected to the first transmission path center, and becomes symmetry about central shaft.
Described a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape, it is characterised in that inverted T shape loads counterfoil, produces trap characteristic；The size of counterfoil is loaded, it is achieved trap is adjustable by regulating inverted T shape.
Described a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape, it is characterised in that the ultra broadband of 3.1-10.6GHz can be produced by adjustment open circuit counterfoil loading structure and multimode resonator size.
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, passband is adjustable, trap is adjustable.
The ultra broadband of 3.1-10.6GHz can be produced by adjustment open circuit counterfoil loading structure and multimode resonator size.
The size of counterfoil is loaded, it is achieved trap is adjustable by regulating inverted T shape.
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 multimode resonator structure chart of the invention process example 1；
Fig. 4 is the S parameter analogous diagram of the invention process example 1
Detailed description of the invention
The present invention devises a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape, and wave filter trap is adjustable, passband is adjustable for this.
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 (101) is dielectric constant is the FR-4 of 4.4.The thickness of this medium substrate is 0.8mm.Metal ground plate (106) under medium substrate adopts copper product.
As shown in Figure 1, a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape of the present invention, microstrip transmission line (102) on medium substrate, multimode resonator (103), open circuit counterfoil loading structure (104), adopt copper product.
As shown in Figure 1, a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape of the present invention, is positioned at the via (105) running through medium substrate (101) between open circuit counterfoil loading structure (104) and metal ground plate (106) and adopts copper product.
As it is shown on figure 3, a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape of the present invention, its multimode resonator includes inverted T shape and loads counterfoil (1031), rectangle resonant ring (1032), multimode resonator realize trap characteristic.
The design parameter of a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape of this invention:
The selection of medium substrate: relative dielectric constant is the FR4 material of 4.4, FR4 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.Multimode resonator 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 straight-flanked ring structure resonance unit of ultra-wideband communications and includes an inverted T shape loading counterfoil.Loading counterfoil by inverted T shapes such as adjustment, adjust notch location, the trap producing 5.8GHz can filter the interference of WLAN.
Open circuit counterfoil loading structure design: according to micro-strip transmission theory, design the size of open circuit counterfoil loading structure, produce ultra broadband.
Claims (7)
1. the adjustable UWB wave filter of trap of counterfoil is loaded based on inverted T shape, including: medium substrate (101), microstrip transmission line (102), multimode resonator (103), open circuit counterfoil loading structure (104), via (105), ground plane (106).
2. a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape according to claim 1, it is characterised in that described multimode resonator is loaded counterfoil (1031) by inverted T shape, rectangle resonant ring (1032) forms.
3. a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape according to claim 1, it is characterised in that open circuit counterfoil loading structure, multimode resonator, microstrip transmission line structure are all printed on dielectric-slab upper surface.Described via is connected through dielectric-slab with open circuit counterfoil loading structure and ground plane.Ground plane is positioned at dielectric-slab lower surface.
4. a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape according to claim 1, it is characterised in that open circuit counterfoil loading structure is positioned at above multimode resonator, is connected with multimode resonator.
5. a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape according to claim 1, it is characterised in that inverted T shape loads counterfoil and is connected to the first transmission path center, and becomes symmetry about central shaft.
6. a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape according to claim 1, it is characterised in that inverted T shape loads counterfoil, produces trap characteristic；The size of counterfoil is loaded, it is achieved trap is adjustable by regulating inverted T shape.
7. a kind of adjustable UWB wave filter of trap loading counterfoil based on inverted T shape according to claim 1 and 2, it is characterised in that the ultra broadband of 3.1-10.6GHz can be produced by adjustment open circuit counterfoil loading structure and multimode resonator size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798620.4A CN105762454A (en) | 2014-12-19 | 2014-12-19 | Inverted-T-shaped loading stub based trapped wave adjustable UWB filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798620.4A CN105762454A (en) | 2014-12-19 | 2014-12-19 | Inverted-T-shaped loading stub based trapped wave adjustable UWB filter |
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| CN105762454A true CN105762454A (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410798620.4A Pending CN105762454A (en) | 2014-12-19 | 2014-12-19 | Inverted-T-shaped loading stub based trapped wave adjustable UWB filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450604A (en) * | 2016-09-29 | 2017-02-22 | 南京邮电大学 | Planar dual-mode barron band-pass filter with adjustable transmission zero point |
| CN106876834A (en) * | 2015-12-10 | 2017-06-20 | 哈尔滨黑石科技有限公司 | A kind of adjustable UWB wave filters of trap that counterfoil is loaded based on inverted T shape |
-
2014
- 2014-12-19 CN CN201410798620.4A patent/CN105762454A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876834A (en) * | 2015-12-10 | 2017-06-20 | 哈尔滨黑石科技有限公司 | A kind of adjustable UWB wave filters of trap that counterfoil is loaded based on inverted T shape |
| CN106450604A (en) * | 2016-09-29 | 2017-02-22 | 南京邮电大学 | Planar dual-mode barron band-pass filter with adjustable transmission zero point |
| CN106450604B (en) * | 2016-09-29 | 2019-04-09 | 南京邮电大学 | A kind of adjustable plane bimodulus balun bandpass filter of transmission zero |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |
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| WD01 | Invention patent application deemed withdrawn after publication |