CN105789750A - E type resonator and T type feeder line based dual-mode dual-band narrow-band filter - Google Patents
E type resonator and T type feeder line based dual-mode dual-band narrow-band filter Download PDFInfo
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- CN105789750A CN105789750A CN201410803096.5A CN201410803096A CN105789750A CN 105789750 A CN105789750 A CN 105789750A CN 201410803096 A CN201410803096 A CN 201410803096A CN 105789750 A CN105789750 A CN 105789750A
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Abstract
The invention discloses a novel E type resonator and T type feeder line based dual-mode dual-band narrow-band filter. The filter comprises a dielectric plate (8), a metal microstrip patch (9) and a metal grounding plate (7), wherein the metal microstrip patch (9) is arranged on the dielectric plate (8); the metal grounding plate (7) is arranged under the dielectric plate (8); and the metal microstrip patch comprises an E type slotted resonator (1), an E type slotted resonator (2) and two T type feeder lines (3, 4). The dual-mode dual-band wide-stop-band filter has the characteristics of compact structure, small size, easy machining, good filtering effect, low manufacturing cost, relatively wide application range, and the like.
Description
Technical field
The present invention relates to a kind of double-mode double-band narrow band filter based on E type resonator Yu T-shaped feeder line, E type resonator is utilized to produce strange mould and even mould, T-shaped feeder line is make use of to couple two resonators to realize double frequency response, two narrow passband central frequency respectively 1.8GHz and 2.4GHz.The advantage of this wave filter is in that, wave filter is compact, low insertion loss and efficient filtering characteristic.Due to the characteristic that these are good so that this wave filter is more suitable in modern wireless communication systems.There is higher practical value.
Background technology
The develop rapidly many passbands to microwave device, the compact etc. of Wireless microwave communication system propose requirements at the higher level, such as all frequency range functional modules that GSM, CDMA and ISM are open are concentrated on identical platform, demand radio frequency (RF) equipment is operated in multiple different, the frequency band separated, so that user can access each service in multi mode terminal or terminal, in order to meet the requirement that this many passbands are integrated, occur in that the design upsurge of dual-passband microwave device, such as antenna, RECTIFYING ANTENNA, bonder, band filter etc..The present invention, by E type resonator and T-shaped feeder line, have devised a compact double-mode double-band wave filter.It is true that each dual-mode resonator can serve as double tunning resonance circuit.Therefore, for specifying the quantity of the resonator needed for equivalent properties wave filter to reduce to half, the thus compact layout of wave filter, so the Miniaturization Design that the application of these structures is microwave device is made that favorable attributes.
Double-mode double-band wave filter generally has three kinds of typical methods for designing, a kind of method is to utilize bimodulus step impedance resonator (SIRS), in this case, second passband is actually a frequency response of dual-mode resonator, it is possible to adjusted by the structural parameters of SIR.Second method is to use multilayer technique, uses multilayer technique, and double-mode double-band band-pass filter has two dual-mode resonators.Each dual-mode resonator works alone in its respective frequency, and each dual-mode resonator is corresponding to a passband of double frequency filter.Compact double-mode double-band wave filter is realized by suitably adjusting these two resonators and feeder line double frequency filter.Based on a similar idea, an annular dual-mode resonator is suggested.There is provided enough and be coupled to this two passbands, by air bridge technology, two feeder lines are placed in the middle of resonator.Recently, to put it more simply, make design more applicable Luo, S and Zhu, L propose double-mode double-band wave filter at plane form in 2009.
HFSS simulation result shows that two passbands of wave filter lay respectively at 1.8GHz and 2.4GHz, minimum insertion loss is 1.08db and 1.42db relative to lower passband and upper passband respectively, therefore, this wave filter has a very low insertion loss, and well compactedness and selectivity.
Summary of the invention
The present invention utilizes E type resonator and T-shaped feeder line to form many transmission zeros outside two passbands, thus being greatly improved the selectivity of wave filter, its purpose is to design a kind of compact conformation performance excellent, and usage range is compact double-mode double-band wave filter widely.
The technical solution adopted in the present invention:
Based on the double-mode double-band narrow band filter of E type resonator Yu T-shaped feeder line, including dielectric-slab (8), metal micro-strip paster (9) and metal ground plate (7).
The described double-mode double-band narrow band filter based on E type resonator Yu T-shaped feeder line, it is characterised in that: dielectric-slab (8) be arranged above metal micro-strip paster (9), the lower section of dielectric-slab (8) is metal ground plate (7).
The described double-mode double-band narrow band filter based on E type resonator Yu T-shaped feeder line, it is characterized in that: metal micro-strip paster (9) is resonator (1) and E type fluting resonator (2) of being slotted by E type, and two T-shaped feeder line (3,4) compositions.
The described double-mode double-band narrow band filter based on E type resonator Yu T-shaped feeder line, it is characterised in that: two T-shaped feeder lines (3,4), two transmission zeros can be obtained at high frequency band by changing the size of T-shaped feeder line.
This invention wave filter has following characteristic and advantage relative to existing wave filter:
Compact conformation, size are little, it is easy to processing, and make low price.
This wave filter has two E type resonators.
The mid frequency of two passbands can be regulated respectively by changing the size of E type resonator.
This wave filter has two E type resonators and simple shape.
Two zero points of transmission can be produced in passband by changing the size of T-shaped feeder line.
Accompanying drawing explanation
Fig. 1 is the basic structure axonometric chart with compact double-mode double-band wave filter of the present invention；
Fig. 2 is the basic structure front view with compact double-mode double-band wave filter of the present invention；
Fig. 3 is the side view with compact double-mode double-band wave filter of the present invention；
Fig. 4 is the analogous diagram with compact double-mode double-band wave filter of the present invention；
Detailed description of the invention
In recent years, multimode resonance starts to be applied in the design of microstrip bandpass filter, and this type filter makes full use of the characteristic presenting multiple mode of resonance in passband, it is achieved multi-mode resonant filter has manifold bandwidth Stopband Performance.Compared with other dual-passband Wide stop bands wave filter, the compact conformation of this wave filter, it is easy to processing, applied widely, it is used widely in wireless technology.The present invention utilizes two E type resonators and two T-shaped feeder lines to carry out coupling the response realized in two passbands with resonator, devises a kind of compact double-mode double-band wave filter.
Specifically invention is described in more detail below in conjunction with accompanying drawing:
As it is shown in figure 1, the dielectric-slab manufacture with compact double-mode double-band wave filter employing two-sided copper foil covered of the present invention.Wherein, dielectric-slab upper surface is metal micro-strip paster (9), and the lower surface of dielectric-slab is metal ground plate (7).Described metal micro-strip paster is slotted by E type resonator (1) and E type resonator (2), and what two T-shaped feeder lines (3) and (4) formed.
In Fig. 2, (5) and (6) are feed port, and its port width is calculated by the parameter such as dielectric constant (2) and medium thickness of slab (0.7874mm) can obtain 2mm.
This wave filter is made up of two E type resonator (1) and (2) and two T-shaped feeder lines (5) and (6), and each E type resonator is made up of a step combline resonators being centrally located open stub other.
The mid frequency of two passbands can be regulated respectively by changing the size of E type fluting resonator (1) and E type resonator (2).
By this structure different parameters, the characteristic realizing double-mode double-band Wide stop bands is set, some structural parameters (size of E type resonator dimensions and T-shaped feeder line along with wave filter, the dielectric constant of dielectric-slab) change, the passband bandwidth of this compact double-mode double-band wave filter is in change, and center frequency point is also in change.
Claims (4)
1. based on the double-mode double-band narrow band filter of E type resonator Yu T-shaped feeder line, including dielectric-slab (8), metal micro-strip paster (9) and metal ground plate (7).
2. the double-mode double-band narrow band filter based on E type resonator Yu T-shaped feeder line according to claim 1, it is characterized in that: dielectric-slab (8) be arranged above metal micro-strip paster (9), the lower section of dielectric-slab (8) is metal ground plate (7).
3. the double-mode double-band narrow band filter based on E type resonator Yu T-shaped feeder line according to claim 1, it is characterized in that: metal micro-strip paster (9) is resonator (1) and E type fluting resonator (2) of being slotted by E type, and two T-shaped feeder line (3,4) compositions.
4., according to claim 1 based on the double-mode double-band narrow band filter of E type resonator Yu T-shaped feeder line, it is characterised in that two T-shaped feeder lines (3,4), two transmission zeros can be obtained at high frequency band by changing the size of T-shaped feeder line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410803096.5A CN105789750A (en) | 2014-12-22 | 2014-12-22 | E type resonator and T type feeder line based dual-mode dual-band narrow-band filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410803096.5A CN105789750A (en) | 2014-12-22 | 2014-12-22 | E type resonator and T type feeder line based dual-mode dual-band narrow-band filter |
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| CN105789750A true CN105789750A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410803096.5A Pending CN105789750A (en) | 2014-12-22 | 2014-12-22 | E type resonator and T type feeder line based dual-mode dual-band narrow-band filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301472A (en) * | 2018-10-31 | 2019-02-01 | 南通至晟微电子技术有限公司 | Double frequency-band millimeter wave antenna |
| CN109981059A (en) * | 2019-02-22 | 2019-07-05 | 中科院微电子研究所昆山分所 | A kind of power amplifier Clutter Suppressing Circuit |
-
2014
- 2014-12-22 CN CN201410803096.5A patent/CN105789750A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109301472A (en) * | 2018-10-31 | 2019-02-01 | 南通至晟微电子技术有限公司 | Double frequency-band millimeter wave antenna |
| CN109981059A (en) * | 2019-02-22 | 2019-07-05 | 中科院微电子研究所昆山分所 | A kind of power amplifier Clutter Suppressing Circuit |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160720 |
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| WD01 | Invention patent application deemed withdrawn after publication |