CN208128208U - A kind of narrow bend ceramic filter - Google Patents
A kind of narrow bend ceramic filter Download PDFInfo
- Publication number
- CN208128208U CN208128208U CN201821303729.6U CN201821303729U CN208128208U CN 208128208 U CN208128208 U CN 208128208U CN 201821303729 U CN201821303729 U CN 201821303729U CN 208128208 U CN208128208 U CN 208128208U
- Authority
- CN
- China
- Prior art keywords
- ceramic resonator
- ceramic
- resonator
- variable capacitor
- parallel
- 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.)
- Active
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model is a kind of narrow bend ceramic filter, is connected and is composed in parallel by ceramic resonator；The ceramic resonator includes a ceramic resonator D, a parallel variable capacitor Cf, a series capacitance C；A pin of the ceramic resonator D connects one end of parallel variable capacitor Cf, another pin connects one end of series capacitance C, the other end of parallel variable capacitor Cf is connected with the other end of series capacitance C, the common end that a pin of ceramic resonator D is connected with one end of parallel variable capacitor Cf forms a pin of ceramic resonator, and the open end that the other end of parallel variable capacitor Cf is connected with the other end of series capacitance C forms another pin of ceramic resonator.Narrow bend ceramic filter in the utility model can carry out frequency trim by adjusting parallel variable capacitor Cf due to the parallel variable capacitor Cf in ceramic resonator.
Description
Technical field
The utility model relates to filter field, in particular to a kind of narrow bend ceramic filter.
Background technique
Existing narrow band filter is ceramic resonator piece ladder-type filter, and filter internal uses multiple ceramic resonator pieces
Trapezoidal connection type is combined into a complete narrow band filter using the series-parallel characteristic of ceramic resonator piece.Due to existing
Narrow band filter requires the frequency error of single ceramic resonator piece minimum, and in ceramic resonance piece processing link, machining is missed
Difference is the main reason for leading to ceramic frequency error, so, in the fabrication process, machining accuracy is controlled and is required and its tight
Lattice, rejection rate is very high in process, and production efficiency is low.Therefore, currently, the manufacturer of the such narrow band filter of all productions
Wholly off production, after the halt production of existing narrow band filter, newly developed narrow-band communication equipments can only use extensive DSP number
Word traffic filter, hardware design need software programming cooperation debugging, and the product design period is long, and design cost is high, leads to big portion
The product cost pressure abruptly increase for dividing added value low, is unable to satisfy middle-end market demand.
Utility model content
The utility model aiming at narrow bend ceramic filter in the fabrication process, to machining accuracy control require and
It is stringent, and rejection rate is very high in process, the low deficiency of production efficiency, provides a kind of narrowband and holds ceramic filter.
The technical solution of the utility model is：A kind of narrow bend ceramic filter is connected and is composed in parallel by ceramic resonator；
The ceramic resonator includes a ceramic resonator D, a parallel variable capacitor Cf, a series capacitance C；The pottery
A pin of porcelain oscillator D connects one end of parallel variable capacitor Cf, another pin connects one end of series capacitance C, and parallel connection is variable
The other end of capacitor Cf is connected with the other end of series capacitance C, and a pin of ceramic resonator D is with parallel variable capacitor Cf's
The connected common end in one end forms a pin of ceramic resonator, and the other end of parallel variable capacitor Cf is with series capacitance C's
The connected open end of the other end forms another pin of ceramic resonator.
Narrow bend ceramic filter in the utility model can pass through due to the parallel variable capacitor Cf in ceramic resonator
Frequency trim can be carried out by adjusting parallel variable capacitor Cf, can suitably be relaxed the centre frequency error of ceramic resonator, be not required to
Mechanical lapping machining accuracy is completely dependent on to guarantee the frequency of ceramic resonance piece as the manufacturing process of traditional narrow ceramic filter
Rate precision reduces manufacture difficulty of processing, considerably reduces manufacturing cost.
Further, in above-mentioned narrow bend ceramic filter：Including ceramic resonator A, ceramic resonator B, ceramic resonance
Device C, ceramic resonator D, ceramic resonator E, ceramic resonator F, ceramic resonator G, ceramic resonator H；Ceramic resonator H with
Ceramic resonator D series connection, ceramic resonator G connects with ceramic resonator C, ceramic resonator F connects with ceramic resonator B, makes pottery
Porcelain resonator E is in parallel again after connecting with ceramic resonator A.
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Detailed description of the invention
Fig. 1 is 1 narrow bend ceramic filter schematic diagram of the utility model embodiment.
Fig. 2 is 1 narrow bend ceramic filter test result of the utility model embodiment.
Specific embodiment
Embodiment 1, the multiple ceramic resonator series windings of the present embodiment and parallel combination structure, the present embodiment use 4 ceramics
Resonator series winding, four ceramic resonators compose in parallel, as shown in Figure 1, ceramic resonator includes ceramic resonator D, one
A parallel variable capacitor Cf, a series capacitance C；A pin of the ceramic resonator D connects parallel variable capacitor Cf's
One end, another pin connect one end of series capacitance C, and the other end of parallel variable capacitor Cf is connected with the other end of series capacitance C,
One of the common end formation ceramic resonator that a pin of ceramic resonator D is connected with one end of parallel variable capacitor Cf draws
Foot, the open end that the other end of parallel variable capacitor Cf is connected with the other end of series capacitance C form the another of ceramic resonator
A pin.
In the present embodiment, there is eight ceramic resonators, ceramic resonator A, ceramic resonator in narrow bend ceramic filter
B, ceramic resonator C, ceramic resonator D, ceramic resonator E, ceramic resonator F, ceramic resonator G, ceramic resonator H；Pottery
Porcelain resonator H connects with ceramic resonator D, ceramic resonator G connects with ceramic resonator C, ceramic resonator F and ceramic resonance
Device B series connection, ceramic resonator E are in parallel again after connecting with ceramic resonator A.
In the present embodiment, in ceramic resonator, cooperation parallel variable capacitor Cf trimmer forms a complete narrowband
Filter cell.Ceramic resonator centre frequency does not need completely the same, and centre frequency error is by fine tuning partial collimation, in this way
The benefit done is to greatly reduce device screening requirement, shortens production hour, reduces manufacturing cost.
Former filter uses ceramic resonator chip architecture, finely tunes without frequency calibration, and frequency error is completely dependent on mechanical ruler
Very little machining accuracy guarantees.
Ceramic resonator has a series resonance point and a parallel resonant point, utilizes multiple ceramic resonator parallel resonances
Characteristic is formed the rear of narrow band filter and is formed narrow along passband and stopband characteristic using multiple ceramic resonator series resonance characteristics
The forward position passband and stopband characteristic of band filter, multiple ceramic resonators combine the rectangle that can improve narrow band filter in series and parallel
Coefficient and bandwidth, adjustment trimmer can improve the passband fluctuation characteristic and frequency error of narrow band filter.It is to survey shown in Fig. 2
The amplitude-frequency characteristic shown on Network Analyzer when examination.
Claims (2)
1. a kind of narrow bend ceramic filter is connected and is composed in parallel by ceramic resonator；It is characterized in that：The ceramic resonance
Device includes a ceramic resonator D, a parallel variable capacitor Cf, a series capacitance C；The one of the ceramic resonator D
A pin connects one end of parallel variable capacitor Cf, another pin connects one end of series capacitance C, the other end of parallel variable capacitor Cf
It is connected with the other end of series capacitance C, a pin of ceramic resonator D is connected public with one end of parallel variable capacitor Cf
End forms a pin of ceramic resonator, the public affairs that the other end of parallel variable capacitor Cf is connected with the other end of series capacitance C
Another pin of beginning formation ceramic resonator.
2. narrow bend ceramic filter according to claim 1, it is characterised in that：Including ceramic resonator A, ceramic resonator
B, ceramic resonator C, ceramic resonator D, ceramic resonator E, ceramic resonator F, ceramic resonator G, ceramic resonator H；Pottery
Porcelain resonator H connects with ceramic resonator D, ceramic resonator G connects with ceramic resonator C, ceramic resonator F and ceramic resonance
Device B series connection, ceramic resonator E are in parallel again after connecting with ceramic resonator A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821303729.6U CN208128208U (en) | 2018-08-14 | 2018-08-14 | A kind of narrow bend ceramic filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821303729.6U CN208128208U (en) | 2018-08-14 | 2018-08-14 | A kind of narrow bend ceramic filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208128208U true CN208128208U (en) | 2018-11-20 |
Family
ID=64185534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821303729.6U Active CN208128208U (en) | 2018-08-14 | 2018-08-14 | A kind of narrow bend ceramic filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208128208U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861664A (en) * | 2018-08-14 | 2019-06-07 | 深圳芯珑电子技术有限公司 | A kind of narrow bend ceramic filter |
| RU2799663C1 (en) * | 2023-03-10 | 2023-07-10 | Александр Петрович Каратунов | Filter for multi-band speaker system |
-
2018
- 2018-08-14 CN CN201821303729.6U patent/CN208128208U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861664A (en) * | 2018-08-14 | 2019-06-07 | 深圳芯珑电子技术有限公司 | A kind of narrow bend ceramic filter |
| RU2799663C1 (en) * | 2023-03-10 | 2023-07-10 | Александр Петрович Каратунов | Filter for multi-band speaker system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190341910A1 (en) | Wideband piezoelectric filter with ladder-structure | |
| US9419585B2 (en) | Elastic wave filter device and duplexer | |
| US20170310302A1 (en) | Tunable Resonator Element, Filter Circuit and Method | |
| CN107342749B (en) | Band-pass filter | |
| US9685685B2 (en) | Variable bandwidth RF filter | |
| US20160204755A1 (en) | Resonator device and high frequency filter | |
| US20060055488A1 (en) | Resonator filter structure having equal resonance frequencies | |
| CN208128208U (en) | A kind of narrow bend ceramic filter | |
| WO2021159881A1 (en) | Method for adjusting fbar parasitic component, filter, multiplexer, and communication device | |
| KR100809120B1 (en) | Bulk accoustic wave filter | |
| JP2006513662A5 (en) | ||
| US20230036920A1 (en) | Bi-polar border region in piezoelectric device | |
| US9812751B2 (en) | Plurality of resonator cavities coupled by inductive apertures which are adjusted by capacitive parts | |
| CN109861664A (en) | A kind of narrow bend ceramic filter | |
| CN218570205U (en) | Radio frequency filter topological structure | |
| Qi et al. | High performance TD-SCDMA band-pass filter based on film bulk acoustic resonator technology | |
| WO2004066494A1 (en) | Resonator filter structure with improved balance | |
| US11881608B2 (en) | Filter device | |
| CN108449067A (en) | Bulk accoustic wave filter | |
| CN210224240U (en) | Adjustable capacitive coupling structure | |
| US20210194459A1 (en) | Broadband acoustic wave resonator (awr) filters | |
| CN112702038A (en) | Tunable solid-mounted bulk acoustic wave resonator | |
| Mao et al. | Fully tunable filter design using tunable transformers and multiple mode resonators | |
| US11575363B2 (en) | Hybrid bulk acoustic wave filter | |
| Waghmare et al. | Design and Simulation of GPS (1.56-1.61 GHz) RF Lattice and Ladder Type SAW Filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |