CN106301272A - A kind of miniature, low frequency LC microwave filter - Google Patents
A kind of miniature, low frequency LC microwave filter Download PDFInfo
- Publication number
- CN106301272A CN106301272A CN201610642600.7A CN201610642600A CN106301272A CN 106301272 A CN106301272 A CN 106301272A CN 201610642600 A CN201610642600 A CN 201610642600A CN 106301272 A CN106301272 A CN 106301272A
- Authority
- CN
- China
- Prior art keywords
- transmission line
- electric capacity
- row
- resonator
- low frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H5/00—One-port networks comprising only passive electrical elements as network components
Abstract
The present invention relates to a kind of miniature, low frequency LC microwave filter, belong to LC band filter apparatus field.Including metal screen case, the intracavity bottom of metal screen case is fixed with transmission line micro-strip plate, transmission line micro-strip plate is provided with two row's transmission lines, transmission line is provided with high Q electric capacity, corresponding resonator is constituted by high Q wire-wound inductor in parallel on high Q electric capacity, interconnect between resonator, the resonance of very low frequency can be realized under the least volume, it is re-introduced into high Q coiled wire-wound coil to couple together between high Q electric capacity, by itself and resonator common resonance, break the rule of resonator separations at least 1/4 wavelength, substantially reduce the length of product, so that volume of the present invention is little, frequency is low, being easily integrated, reduce the production cost of product simultaneously.
Description
Technical field
The present invention relates to LC band filter apparatus field, particularly relate to a kind of miniature, low frequency LC microwave filter.
Background technology
Microwave filter has the important function such as frequency-selecting, frequency dividing and isolation signals, at modern microwave millimetre-wave attenuator, satellite
Being widely used in the systems such as communication, remote sensing and Radar Technology, the quality of its performance will directly influence the operation matter of whole system
Amount.Along with the development of electronic information, LC wave filter, as the indispensable part of signal processing, have also been obtained development rapidly,
And apply extremely wide.
The kind of the existing wave filter of China and the frequency of covering the most substantially meet various existing telecommunication apparatus.China is all kinds of
The applicable cases of wave filter: LC wave filter accounts for 50%, crystal filter accounts for 20%, and mechanical filter accounts for 15%, the filter of pottery harmony surface
Ripple device each 1%, remaining all kinds of wave filter accounts for 13% altogether.
Along with the fast development of wireless communication system, to the miniaturization of system, integrated propose the highest requirement,
Thus just require that LC microwave filter is to more miniaturization, integrated development.
Summary of the invention
For the problem of shortcomings and deficiencies in prior art, the present invention proposes a kind of miniature, low frequency LC microwave filter,
Volume is little, and frequency is low, it is easy to integrated, reduces the production cost of product simultaneously.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of miniature, low frequency LC microwave filter, including metal screen case, the intracavity bottom of metal screen case is fixed with biography
Defeated line micro-strip plate, transmission line micro-strip plate is provided with first row, second row transmission line, and transmission line is provided with high Q electric capacity, transmission line it
Between and the high Q electric capacity of same row's transmission line between by high Q coiled wire-wound coil connect, first row transmission line ground connection, second row transmit
The two ends of line are connected with the glass contact pin inserted by two ends bottom metal screen case by connecting line respectively, second row transmission line
All high Q electric capacity high Q wire-wound inductor in parallel respectively on the high Q electric capacity at two ends and first row transmission line, corresponding parallel connection
High Q electric capacity and high Q wire-wound inductor constitute a resonator, be connected to second row and pass after the resonator parallel connection in first row transmission line
Between two resonators on defeated line.
Further, described transmission line micro-strip plate is the FR-4 resin of dielectric constant 4.7.
There is advantages that resonator is made up of high Q electric capacity and high Q wire-wound inductor, it is possible to
Realize the resonance of very low frequency under the least volume, thus be greatly reduced the volume of product；Capacitance and high Q due to high Q electric capacity
The inductance value of wire-wound inductor is alternative big, it is possible to can realize the strongest coupling under the least volume, and reach the highest
Performance, thus reduce the volume of product further；Due to the introducing of high Q coiled wire-wound coil, couple together between high Q electric capacity,
And jointly cause resonance with high Q electric capacity, break the rule of resonator separations at least l/4 wavelength, thus substantially reduce product
Length；Volume of the present invention is little, thus greatly reduces the production cost of product, has the most preferably adapted to system compact, collection
The requirement of one-tenthization.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention；
Fig. 2 is equivalent circuit diagram of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, people in the art
The present invention can be made various changes or modifications by member, and these equivalent form of values fall within the application appended claims equally and limited
Scope.
As it is shown in figure 1, a kind of miniature, low frequency LC microwave filter, including metal screen case 1, metal screen case 1
Intracavity bottom is fixed with transmission line micro-strip plate 2, and transmission line micro-strip plate 2 is provided with first row transmission line 3, second row transmission line 4, passes
Defeated line is provided with high Q electric capacity 5, is connected by high Q coiled wire-wound coil between transmission line and between the high Q electric capacity 5 of same row's transmission line,
First row transmission line 3 ground connection, the two ends of second row transmission line 4 are respectively by connecting line 7 and by two ends bottom metal screen case 1
The glass contact pin 8 inserted is connected, all high Q electric capacity 5 on the high Q electric capacity 5 at second row transmission line 4 two ends and first row transmission line 3
A high Q wire-wound inductor 6 in parallel respectively, corresponding high Q electric capacity 5 in parallel and high Q wire-wound inductor 6 constitute a resonator, the
Between two resonators being connected on second row transmission line 4 after resonator parallel connection in one row's transmission line 3.
Further, described transmission line micro-strip plate 2 is the FR-4 resin of dielectric constant 4.7.
Concrete, high Q electric capacity C4 in high Q electric capacity C1, the C15 at second row transmission line 4 two ends and first row transmission line 3,
C6, C8, C16, C10, C12 are parallel with high Q wire-wound inductor L1, L8, L2, L3, L4, L5, L6, a L7, high Q electric capacity C1 respectively
With high Q wire-wound inductor L1, high Q electric capacity C6 and high Q wire-wound inductor L8, high Q electric capacity C4 and high Q wire-wound inductor L2, high Q electric capacity C6 and
High Q wire-wound inductor L3, high Q electric capacity C8 and high Q wire-wound inductor L4, high Q electric capacity C16 and high Q wire-wound inductor L5, high Q electric capacity C10 and
High Q wire-wound inductor L6, high Q electric capacity C12 and high Q wire-wound inductor L7 respectively constitute a resonator, and one has eight resonators；The
Between two resonators being connected on second row after all resonator parallel connections in one row.
As in figure 2 it is shown, C1 and L1, C4 and L2, C6 and L3, C8 and L4, C16 and L5, C10 and L6, C12 and L7, C15 in figure
Eight resonance points are respectively constituted with L8；High Q electric capacity C2, C3, C5, C7, C9, C11, C13, C15 connected these eight resonance points.
Signal is inputted by Port1 end, and the transmission line through transmission line micro-strip plate arrives Port2 and exports, when the signal passed through
When frequency is identical with the resonant frequency of transmission microstrip line, signal just can export from PORT2, simultaneously by the letter outside resonant frequency
Number filter.
The present invention is by high Q electric capacity and high Q wire-wound inductor composition resonator, it is possible to realize very under the least volume
The resonance of low frequency, thus it is greatly reduced the volume of product；And introduce high Q coiled wire-wound coil and couple together between high Q electric capacity,
Jointly cause resonance with high Q electric capacity, broken the rule of resonator separations at least l/4 wavelength, thus substantially reduced product
Length.Volume of the present invention is little, thus reduces the production cost of product, has also better adapted to system compact, integrated
Requirement.
Claims (2)
1. a miniature, low frequency LC microwave filter, it is characterised in that: include metal screen case, the inner chamber of metal screen case
Bottom is fixed with transmission line micro-strip plate, and transmission line micro-strip plate is provided with first row, second row transmission line, and transmission line is provided with high Q
Electric capacity, is connected by high Q coiled wire-wound coil between transmission line and between the high Q electric capacity of same row's transmission line, and first row transmission line connects
Ground, the two ends of second row transmission line are respectively by connecting line and the glass contact pin phase inserted by two ends bottom metal screen case
Even, all high Q electric capacity high Q coiling in parallel respectively on the high Q electric capacity at second row transmission line two ends and first row transmission line
Inductance, corresponding high Q electric capacity in parallel and high Q wire-wound inductor constitute a resonator, and the resonator in first row transmission line is in parallel
After between two resonators being connected on second row transmission line.
A kind of miniature, low frequency LC microwave filter the most according to claim 1, it is characterised in that: described transmission line micro-strip plate
FR-4 resin for dielectric constant 4.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610642600.7A CN106301272A (en) | 2016-08-08 | 2016-08-08 | A kind of miniature, low frequency LC microwave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610642600.7A CN106301272A (en) | 2016-08-08 | 2016-08-08 | A kind of miniature, low frequency LC microwave filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106301272A true CN106301272A (en) | 2017-01-04 |
Family
ID=57666328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610642600.7A Pending CN106301272A (en) | 2016-08-08 | 2016-08-08 | A kind of miniature, low frequency LC microwave filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106301272A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023065845A1 (en) * | 2021-10-22 | 2023-04-27 | 深圳飞骧科技股份有限公司 | Smd debugger |
-
2016
- 2016-08-08 CN CN201610642600.7A patent/CN106301272A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023065845A1 (en) * | 2021-10-22 | 2023-04-27 | 深圳飞骧科技股份有限公司 | Smd debugger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100595972C (en) | Bandpass wave filter and RF communication device using same | |
| US8115569B2 (en) | Monoblock dielectric multiplexer capable of processing multi-band signals | |
| CN101621144A (en) | Miniature filter with low loss, high stop band and multi-zero suppression | |
| CN103236572B (en) | The distributed bimodule band-pass filter of a kind of Compact microwave | |
| CN104124496B (en) | Micro-band tri-band bandpass filter | |
| CN105720339A (en) | Dual-band adjustable band-pass filter | |
| CN110808440A (en) | Dielectric waveguide duplexer | |
| CN104577268A (en) | Planar lowpass-bandpass triplexer | |
| CN103794838A (en) | LTCC-based S-waveband high-performance micro band-pass balanced filter | |
| CN101621147B (en) | 2.4-kilomegahertz miniature band-pass filter with low loss and double-zero | |
| CN110165347B (en) | High-isolation microstrip duplexer loaded with open-circuit branches | |
| CN207368186U (en) | A kind of bandstop filter and communication equipment | |
| CN106301272A (en) | A kind of miniature, low frequency LC microwave filter | |
| CN104332681A (en) | Novel three-dimensional multilayer single-zero-point dual-mode filter | |
| CN204375881U (en) | Plane lower passband leads to triplexer | |
| US10447227B2 (en) | Radio frequency transceiver circuit with distributed inductor and method thereof | |
| CN105914434A (en) | Triangle three-mode band pass filter | |
| CN202058839U (en) | Small-sized double-band band pass filter | |
| Wang et al. | Miniaturized substrate integrated waveguide filters with stepped-impedance slot resonators for millimeter-wave application | |
| CN205142153U (en) | Small -size microwave LC wave filter | |
| CN105742770A (en) | Four-band band-pass filter based on multi-mode resonator | |
| CN105742774A (en) | X-waveband narrow-band band-pass filter | |
| CN107086340B (en) | A kind of tri-band bandpass filter with highly selective pass band tunable | |
| CN105789750A (en) | E type resonator and T type feeder line based dual-mode dual-band narrow-band filter | |
| CN204333181U (en) | Double-mode double-band filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170104 |
|
| WD01 | Invention patent application deemed withdrawn after publication |