CN204205013U - A kind of stepped impedance transmission line structure - Google Patents
A kind of stepped impedance transmission line structure Download PDFInfo
- Publication number
- CN204205013U CN204205013U CN201420448314.3U CN201420448314U CN204205013U CN 204205013 U CN204205013 U CN 204205013U CN 201420448314 U CN201420448314 U CN 201420448314U CN 204205013 U CN204205013 U CN 204205013U
- Authority
- CN
- China
- Prior art keywords
- transmission line
- impedance transmission
- piece
- stepped impedance
- impedance
- 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)
- Waveguides (AREA)
Abstract
The utility model provides a kind of stepped impedance transmission line structure, described stepped impedance transmission line comprises more piece stepped impedance transmission line, described more piece stepped impedance transmission line comprises more than 5 joints, each joint impedance of described more piece impedance transmission lines is all not identical, and each economize on electricity length of described more piece impedance transmission lines is all not identical.Adopt the transmission line structure of more piece impedance, single-unit impedance transfer line structure compared to existing technology or 2 joint stepped impedance transmission line structures, Out-of-band rejection can improve further.
Description
Technical field
The utility model relates to a kind of stepped impedance transmission line structure, particularly relates to a kind of stepped impedance transmission line structure being applicable to wide-band microwave suspension band line frequency demultiplexer.
Background technology
Broadband suspension band line frequency demultiplexer is the conventional device in radio frequency microwave system, and its effect is used to carry out signal sorting, the signal in wide spectrum is pressed different frequency section and exports from different ports.Typical topology is the cascade of multiple high-pass and low-pass filter duplexer.Its schematic diagram is shown in accompanying drawing 1, and wherein LPF represents low pass filter, and HPF represents high pass filter.
As shown in Figure 2, to typical suspension band line frequency demultiplexer domain its function be divided into 4 tunnels to input signal by frequency to export.
As shown in Figure 2, the grounded inductor in traditional Chebyshev's high pass filter LC prototype circuit, adopts the open circuited transmission line of single impedance to be similar to realization (in accompanying drawing 2 1a) in side circuit; Series LC in the LC prototype circuit of elliptic function high pass filter, corresponding actual circuit structure adopts two joint stepped impedance transmission lines be similar to realization (in accompanying drawing 2 1b).But by the capacitor and inductor element transforms of LC prototype circuit to the transmission line structure of side circuit, be all the approximate process in an arrowband, for wideband filtered structure, Out-of-band rejection ability comparatively prototype circuit can reduce, and cannot meet more and more higher demand.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of stepped impedance transmission line structure of the high-pass filtering circuit Out-of-band rejection ability improved in suspended substrate stripline frequency demultiplexer.
The technical solution adopted in the utility model is as follows: a kind of stepped impedance transmission line structure, is characterized in that: described stepped impedance transmission line comprises more piece stepped impedance transmission line.
As preferably, described more piece stepped impedance transmission line comprises more than 5 joints.
As preferably, each joint impedance of described more piece impedance transmission lines is all not identical.
As preferably, each economize on electricity length of described more piece impedance transmission lines is all not identical.
Compared with prior art, the beneficial effects of the utility model are: the transmission line structure adopting more piece impedance, and single-unit impedance transfer line structure compared to existing technology or 2 joint stepped impedance transmission line structures, Out-of-band rejection can improve further.
Accompanying drawing explanation
Fig. 1 is broadband suspension band line frequency demultiplexer principle schematic.
Fig. 2 is typical suspension band line frequency demultiplexer part prototype and corresponding domain schematic diagram in prior art.
Fig. 3 is the utility model wherein embodiment more piece stepped impedance transmission line structure schematic diagram.
Fig. 4 is Out-of-band rejection effect schematic diagram embodiment illustrated in fig. 3.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
As shown in Figure 3, a kind of stepped impedance transmission line structure, described stepped impedance transmission line comprises more piece stepped impedance transmission line.
Adopt the transmission line structure of more piece impedance, single-unit impedance transfer line structure compared to existing technology or 2 joint stepped impedance transmission line structures, Out-of-band rejection can improve further.
Described more piece stepped impedance transmission line comprises more than 5 joints.
Each joint impedance of described more piece impedance transmission lines is all not identical.
Each economize on electricity length of described more piece impedance transmission lines is all not identical.
The described impedance of more piece impedance transmission lines and the occurrence of electrical length, can be calculated by simulation software optimization according to concrete Out-of-band rejection index demand, not repeat them here.
As shown in Figure 3, in this specific embodiment, have employed the impedance step structure that 5 joints are different, as shown in Figure 4, departing from the Frequency point place of band outer 30%, Out-of-band rejection improves about 6dB to its Out-of-band rejection effect.
Claims (1)
1. a stepped impedance transmission line structure, is characterized in that: described stepped impedance transmission line comprises more piece stepped impedance transmission line, and described more piece stepped impedance transmission line comprises more than 5 joints; Each joint impedance of described more piece impedance transmission lines is all not identical; Each economize on electricity length of described more piece impedance transmission lines is all not identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420448314.3U CN204205013U (en) | 2014-08-11 | 2014-08-11 | A kind of stepped impedance transmission line structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420448314.3U CN204205013U (en) | 2014-08-11 | 2014-08-11 | A kind of stepped impedance transmission line structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204205013U true CN204205013U (en) | 2015-03-11 |
Family
ID=52662936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420448314.3U Active CN204205013U (en) | 2014-08-11 | 2014-08-11 | A kind of stepped impedance transmission line structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204205013U (en) |
-
2014
- 2014-08-11 CN CN201420448314.3U patent/CN204205013U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203760606U (en) | Microstrip dual-passband filter | |
| CN104506158B (en) | A kind of analog bandpass filter | |
| CN204119181U (en) | A kind of diplex filter circuit for the synthesis of two-way radiofrequency signal | |
| CN204205013U (en) | A kind of stepped impedance transmission line structure | |
| CN105870552A (en) | Ultra-wideband microstrip bandpass filter | |
| CN205179339U (en) | Audio circuit structure | |
| CN204539097U (en) | A kind of noise reduction filtering circuit for pi type filter and a kind of pi type filter | |
| CN205142152U (en) | High -power band pass filter | |
| CN204290901U (en) | Signal filter circuit | |
| CN204651447U (en) | A kind of medium discrete cross-coupled filter | |
| CN204290903U (en) | The filter circuit that belt switch exports | |
| CN104202006A (en) | Adjustable simple low-pass filtering circuit | |
| CN204481773U (en) | A kind of low-pass filter circuit | |
| CN204633752U (en) | Two-band frequency source | |
| CN204362009U (en) | A kind of analog bandpass filtering device | |
| CN203300775U (en) | Weak coupling cavity filter | |
| CN207460112U (en) | LC low-pass filters | |
| CN202940313U (en) | Band-pass filter formed by low-pass filters | |
| CN204316459U (en) | Triplexer circuit | |
| CN203233497U (en) | Dual-branch terminal branching device circuit | |
| CN204615629U (en) | A kind of multi-source power supply filter | |
| CN103000973B (en) | A kind of bandpass filter being formed by low pass filter | |
| CN205430195U (en) | Multiway switch amplifier assembly | |
| CN204947044U (en) | Micro-band parallel coupling filter | |
| CN202435356U (en) | Novel microwave switch filter component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |