CN204272045U - A kind of band pass filter adopting the micro-band inductance of form of straight lines ground connection - Google Patents
A kind of band pass filter adopting the micro-band inductance of form of straight lines ground connection Download PDFInfo
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- CN204272045U CN204272045U CN201420643386.3U CN201420643386U CN204272045U CN 204272045 U CN204272045 U CN 204272045U CN 201420643386 U CN201420643386 U CN 201420643386U CN 204272045 U CN204272045 U CN 204272045U
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Abstract
The utility model discloses a kind of band pass filter adopting the micro-band inductance of form of straight lines ground connection, comprise more than one electric capacity and more than one inductance; Described band pass filter adopts coupled resonator structure to realize, and described grounded inductor is distributed constant inductance, and described grounded inductor microstrip line realizes.It effectively reduces device volume.Due to simple for production, the R&D cycle obviously shortens.
Description
Technical field
The utility model relates to a kind of band pass filter adopting micro-band inductance, and especially a kind of band pass filter adopting the micro-band inductance of form of straight lines ground connection, belongs to microwave device technology field.
Background technology
Design microwave band-pass filter be usually to use the inductance that inductance value is less than 1n.At present, the inductance that inductance value is less than 1n cannot use wire-wound mode to realize, and causes device volume bigger than normal.
Utility model content
The technical problems to be solved in the utility model is to provide a kind ofly effectively can save module volume, cost-saving, the band pass filter of the micro-band inductance of employing form of straight lines ground connection that shortens the design duration.
Technical solution adopted in the utility model is:
Adopt a band pass filter for the micro-band inductance of form of straight lines ground connection, comprise more than one electric capacity and more than one inductance; Described band pass filter adopts coupled resonator structure to realize, and described grounded inductor is distributed constant inductance.
Further, described grounded inductor microstrip line realizes.
The beneficial effect adopting technique scheme to produce is:
1, the utility model uses distributed constant to replace lumped parameter and realizes small electric inductance value, effectively reduces device volume.
2, the utility model uses microstrip line to realize small electric inductance value, simple for production, shortens the device R&D cycle.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the Performance Simulation Results figure of the utility model embodiment 1.
Embodiment
As shown in Figure 1, a kind of band pass filter adopting the micro-band inductance of form of straight lines ground connection, comprises more than one electric capacity and more than one inductance; Described band pass filter adopts coupled resonator structure to realize, and described grounded inductor is distributed constant inductance.
Further, described grounded inductor microstrip line realizes.
In the present embodiment, it is 1500MHz that polytetrafluoroethylene sheet material realizes a centre frequency, and bandwidth is 100MHz, the suppression departing from centre frequency 300MHz is reached to the band pass filter of 60dBc.The present embodiment adopts 5 rank coupled resonator structures to realize, and makes capacitance and the inductance value of connect with microstrip line can realize with lumped parameter device, only has the inductance value connected over the ground less, is easy to realization.Adopt Chebyshev filtered version, topological classification selects top L form, wire-wound inductor adjustment inband flatness easy to use.
As shown in Figure 1, in the present embodiment, inductance L 1-L9 and electric capacity C1-C5 is comprised.Adopt and calculated by ansoft designer software, obtain the numerical value of each electric capacity and each inductance.Inductance L 1-L4 is respectively 6.972nH, 10.07nH, 10.07nH and 6.972nH, and inductance L 5-L9 is 0.4681nH, and electric capacity C1-C4 is respectively 25.69pF, 26.81pF, 26.31pF, 26.81pF, 25.69pF.
Wherein, inductance value is 0.4681nH over the ground.Technically cannot utility lines realize around inductance existing.Only be translated into distributed constant to realize, use distributed constant replacement lumped parameter to realize the mode of small electric inductance value.
The formula being calculated equivalent microstrip line length by given inductance value is as follows:
In formula,
be microstrip line length, unit is mm,
be inductance value, unit is nH.
for dielectric constant.
it is the characteristic impedance of microstrip line on PCB.In order to make
value comparatively large, we need choose less
and dielectric constant.
Arrange
=2.55, H=0.5mm, T=0.035um, Freq=1.5GHz and W=0.6mm.Calculate
=79.0217 Ω, finally calculate
length be 1.112771mm, in circuit etch, precision can only arrive 0.1mm, and at this, we get length is 1.1mm.
As shown in Figure 2, simulation result shows the utility model and can reach:
Centre frequency 1500MHz, frequency band 100MHz, the suppression departing from centre frequency 300MHz can arrive 60dBc.
Claims (2)
1. adopt a band pass filter for the micro-band inductance of form of straight lines ground connection, comprise more than one electric capacity and more than one inductance; It is characterized in that: described band pass filter adopts coupled resonator structure to realize, and described grounded inductor is distributed constant inductance.
2. the band pass filter of employing form of straight lines ground connection according to claim 1 micro-band inductance is characterized in that: described grounded inductor microstrip line realizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643386.3U CN204272045U (en) | 2014-10-30 | 2014-10-30 | A kind of band pass filter adopting the micro-band inductance of form of straight lines ground connection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643386.3U CN204272045U (en) | 2014-10-30 | 2014-10-30 | A kind of band pass filter adopting the micro-band inductance of form of straight lines ground connection |
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| CN204272045U true CN204272045U (en) | 2015-04-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785258A (en) * | 2016-11-29 | 2017-05-31 | 中国电子科技集团公司第二十九研究所 | A kind of Wide stop bands microstrip line low pass filter and method for designing |
| CN110197021A (en) * | 2019-05-21 | 2019-09-03 | 清华大学深圳研究生院 | A method of microwave integrated circuit on-chip inductor and transformer are realized with transmission line |
-
2014
- 2014-10-30 CN CN201420643386.3U patent/CN204272045U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785258A (en) * | 2016-11-29 | 2017-05-31 | 中国电子科技集团公司第二十九研究所 | A kind of Wide stop bands microstrip line low pass filter and method for designing |
| CN106785258B (en) * | 2016-11-29 | 2019-07-12 | 中国电子科技集团公司第二十九研究所 | A kind of Wide stop bands microstrip line low-pass filter and design method |
| CN110197021A (en) * | 2019-05-21 | 2019-09-03 | 清华大学深圳研究生院 | A method of microwave integrated circuit on-chip inductor and transformer are realized with transmission line |
| CN110197021B (en) * | 2019-05-21 | 2023-01-31 | 清华大学深圳研究生院 | Method for realizing inductor and transformer on microwave integrated circuit chip by using transmission line |
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