CN101383628A - Duplexer - Google Patents
Duplexer Download PDFInfo
- Publication number
- CN101383628A CN101383628A CNA2007101213293A CN200710121329A CN101383628A CN 101383628 A CN101383628 A CN 101383628A CN A2007101213293 A CNA2007101213293 A CN A2007101213293A CN 200710121329 A CN200710121329 A CN 200710121329A CN 101383628 A CN101383628 A CN 101383628A
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- duplexer
- capacitor
- antenna port
- match circuit
- receiving
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Abstract
The invention discloses a duplexer which relates to a duplexer equivalent circuit. The duplexer comprises a matching circuit 1 and a matching circuit 2, wherein one end of the matching circuit 1 is connected with an emission end, the other end is connected with an antenna port, and the matching circuit 1 sends a signal of the emission end to the antenna port and restrains the signal receiving at the same time; one end of the matching circuit 2 is connected with the antenna port, the other end is connected with the receiving end, and the matching circuit 2 restrains the signal sending and only receives a receiving signal. The invention can realize the functions of a nonstandard frequency duplexer by a simple circuit, saves cost and satisfies the research and development as well as the market demands.
Description
Technical field
The present invention relates to duplexer, refer in particular to product the strictness of signal transmitting and receiving insulated degree requirement, as mobile phone, the duplexer equivalent electric circuit in the base station etc.
Background technology
Duplexer claims antenna multicoupler again, is more special two-way three end filters.Its equivalent electric circuit block diagram as shown in Figure 1, the main effect of duplexer is faint received signal should be come in by antenna coupling, again will bigger transmitting power be fed to antenna and gets on, and require both to finish its function separately and do not influence each other.
At present new in the world communication standard and communication frequency band are constantly increasing, and product all has very high requirement to receive-transmit isolation when work, and this function is promptly realized by duplexer, and the research and development of device at present do not catch up with the variation of Market Situation.Duplexer generally all is a standard component, as being fit to 900MHZ, and the duplexer of 1800MHZ or the like, some non-standard frequency duplexer if desired, because the duplexer complex manufacturing, technical requirement is higher, seldom having producer can customize.
Summary of the invention
For solving in R﹠D process or researching and developing and to carry out owing to lacking duplexer during the customer requirement particular frequencies, perhaps can not satisfy the situation of client's needs, the present invention proposes a solution, utilize existing processes, researched and developed the receiving filter that is easier to realize, utilize receiving filter and relevant match circuit to realize the function of duplexer then, through experimental verification, the method for this alternative duplexer is feasible fully.
A kind of duplexer provided by the invention is characterized in that:
This duplexer comprises match circuit 1, and these match circuit 1 one ends link to each other with transmitting terminal, and the other end is connected with antenna port, and this match circuit 1 is responsible for the signal of transmitting terminal is sent to antenna port, suppresses received signal simultaneously;
Contain a match circuit 2, these match circuit 2 one ends link to each other with antenna port, and the other end links to each other with receiving terminal, and this match circuit 2 suppresses to transmit, and receives only received signal.
Described a kind of duplexer comprises a receiving filter, and this receiving filter one end links to each other with receiving terminal, and an end links to each other with match circuit 2, and the other end of match circuit 2 is connected to antenna port.
Described a kind of duplexer comprises a receiving filter and a capacitor C 14, and the output of this receiving filter links to each other with receiving terminal, and an end of input and capacitor C 14 links to each other, and the other end of capacitor C 14 is connected with antenna port.
Aforesaid a kind of duplexer also has a capacitor C 15 between capacitor C 14 and antenna port, an end of this capacitor C 15 is connected with antenna port, and the other end is connected with capacitor C 14.
Beneficial effect of the present invention is that it can realize the function that non-standard frequency duplexer can realize by simple circuit, and the research and development and the market demand are satisfied in cost saving.
Description of drawings
Fig. 1 is the duplexer theory diagram;
Fig. 2 is a duplexer circuit;
Fig. 3 is duplexer circuit embodiment 1;
Fig. 4 is duplexer circuit embodiment 2;
Fig. 5 is duplexer circuit embodiment 3;
Fig. 6 is the performance map of the simple receiving filter of technology.
Embodiment
Be better explanation the present invention, the present invention is further illustrated below by specific embodiment.
Be the simple block diagram of duplexer as shown in Figure 1, duplexer comprises a receiving terminal, and a transmitting terminal and an antenna port, common duplexer mainly are exactly to comprise this several ports.
As shown in Figure 2, transmitting terminal of the present invention comprises match circuit 1, and these match circuit 1 one ends link to each other with transmitting terminal, and the other end is connected with antenna port, and this match circuit 1 is responsible for the signal of transmitting terminal is sent to antenna port, suppresses received signal simultaneously; Its signal flow promptly transmits from transmitting terminal by after the match circuit 1, owing to 2 pairs of inhibitory action that transmit of match circuit of receiving terminal, so it only can directly flow to antenna port to the direction shown in the arrow among Fig. 21.
Receiving terminal of the present invention contains a match circuit 2, and these match circuit 2 one ends link to each other with antenna port, and the other end links to each other with receiving terminal, and this match circuit 2 suppresses to transmit, and only allows received signal to pass through; Its signal flow is to shown in the arrow among Fig. 22, and received signal is come from antenna port, because transmitting terminal inhibitory action to received signal, so received signal only can flow to receiving terminal by match circuit 2.
In sum, by circuit of the present invention, just can realize the function of duplexer.
The preferred embodiments of the present invention are to connect a receiving filter between receiving terminal and match circuit 2, its circuit block diagram as shown in Figure 2, utilize existing processes, utilize receiving filter and match circuit 2 just can realize the function of duplexer, through experimental verification, the method for this alternative duplexer is feasible fully.The performance map of the receiving filter that this test is used as shown in Figure 6, transverse axis is represented frequency, the longitudinal axis represent the decay, can see, the receiving filter smaller bandwidth, to outside very strong inhibitory action is arranged, thereby can guarantee the high-isolation requirement of duplexer.
As shown in Figure 2, emission port directly links to each other with antenna port by match circuit, at this moment for receiving port of the present invention, owing to used receiving filter on the receiving branch, be equivalent to and open circuit, so emitting performance can not be affected. when signal is entered in the circuit by receiving port, 1 pair of signal of the match circuit of emission port has inhibitory action, also be approximately this moment opens circuit, very little to the receiving port influence
Preferred embodiment 1:
As shown in Figure 3, be the preferred embodiments of the present invention 1, receiving terminal links to each other with capacitor C 14 by receiving filter F11, and an other end of capacitor C 14 is connected with capacitor C 15, and an other end of capacitor C 15 is connected with antenna port; Antenna port receives received signal, and by capacitor C 15, capacitor C 14 and receiving filter F11 are sent to receiving terminal, and capacitor C 14 is used for debugging, and received signal and receiving filter are complementary, and can improve the intensity of received signal like this.
As shown in Figure 3, capacitor C 11 and inductance L 11 are in parallel, end capacitor C 12 after the parallel connection, one end of capacitor C 13 is connected, an other end of the other end after the parallel connection and capacitor C 12 and capacitor C 13 is connected, and an end of capacitor C 12 is connected with an end of transmitting terminal simultaneously, and an end of capacitor C 13 is connected with inductance L 12 simultaneously, an other end of inductance L 12 is connected with capacitor C 15, and an other end of capacitor C 15 is connected with antenna port.
Preferred embodiment 2:
As shown in Figure 4, be another preferred embodiment of the present invention, its receiving terminal links to each other with inductance L 23 by receiving filter F21, the other end ground connection of inductance L 23, that end that inductance L 23 links to each other with receiving filter F21 is connected with capacitor C 24 simultaneously, and an other end of capacitor C 24 links to each other with inductance L 24, links to each other with an end of capacitor C 25 simultaneously, an other end of capacitor C 25 is connected with antenna port, an other end ground connection of inductance L 24.
Its transmitting terminal links to each other with emission filter F22, the output of emission filter F22 is connected with an end of capacitor C 26 and inductance L 22, the other end ground connection of capacitor C 26, the other end of inductance L 22 is connected with capacitor C 25 with capacitor C 27, an other end ground connection of capacitor C 27.An other end of capacitor C 25 is connected with antenna port.
Preferred embodiment 3:
As shown in Figure 5, be another preferred embodiment of the present invention, its receiving terminal links to each other with inductance L 33 by receiving filter F31, the other end ground connection of inductance L 33, that end that inductance L 33 links to each other with receiving filter F31 is connected with capacitor C 34 simultaneously, and an other end of capacitor C 34 links to each other with inductance L 34, links to each other with an end of capacitor C 35 simultaneously, an other end of capacitor C 35 is connected with antenna port, an other end ground connection of inductance L 34.
Capacitor C 31 and inductance L 31 are in parallel, end after the parallel connection and capacitor C 32, one end of capacitor C 33 is connected, an other end of the other end after the parallel connection and capacitor C 32 and capacitor C 33 is connected, one end of capacitor C 32 is connected with an end of transmitting terminal simultaneously, one end of capacitor C 33 is connected with an end of inductance L 32 and capacitor C 36 simultaneously, an other end ground connection of capacitor C 36, an other end of inductance L 32 is connected with capacitor C 37 and capacitor C 35, an other end ground connection of capacitor C 37, an other end of capacitor C 35 is connected with antenna port.
To those skilled in the art, match circuit 1 is as long as satisfy and can suppress the received signal function simultaneously and get final product by the transmitting of assigned frequency, and such match circuit form is a lot, will be understood that the match circuit that satisfies such condition is match circuit 1 of the present invention.
To those skilled in the art, match circuit 2 is as long as satisfy the received signal that can receive assigned frequency, and the function that suppresses simultaneously to transmit gets final product.Such match circuit form is a lot, will be understood that equally, and the match circuit that satisfies such condition is match circuit 2 of the present invention.
In sum, the present invention adds receiving filter to improve isolation in circuit, entire circuit is used for substituting the function of duplexer. because the technology of receiving filter is simpler than the technology of duplexer, implement and be easier to, the present invention utilizes existing processes to design receiving filter, on receiving branch, use receiving filter to improve receive-transmit isolation then, realized the function of duplexer.It is feasible fully to substitute duplexer through the experimental verification sort circuit.
The method that it should be apparent to those skilled in the art that this alternative duplexer can be used in chip and the circuit that various inside contain duplexer.As the circuit in the base station, mobile phone circuit etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1, a kind of duplexer is characterized in that:
Comprise match circuit 1, these match circuit 1 one ends link to each other with transmitting terminal, and the other end is connected with antenna port, and this match circuit 1 is responsible for the signal of transmitting terminal is sent to antenna port, suppresses received signal simultaneously;
Contain a match circuit 2, these match circuit 2 one ends link to each other with antenna port, and the other end links to each other with receiving terminal, and this match circuit 2 suppresses to transmit, and receives only received signal.
2, a kind of duplexer according to claim 1 is characterized in that:
Comprise a receiving filter, this receiving filter one end links to each other with receiving terminal, and an end links to each other with match circuit 2, and the other end of match circuit 2 is connected to antenna port.
3, a kind of duplexer according to claim 1 is characterized in that:
Comprise a receiving filter and an electric capacity (C14), the output of this receiving filter links to each other with receiving terminal, and input links to each other with an end of electric capacity (C14), and the other end of electric capacity (C14) is connected with antenna port.
4, a kind of duplexer according to claim 3 is characterized in that:
Also have an electric capacity (C15) between electric capacity (C14) and antenna port, an end of this electric capacity (C15) is connected with antenna port, and the other end is connected with electric capacity (C14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101213293A CN101383628A (en) | 2007-09-04 | 2007-09-04 | Duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101213293A CN101383628A (en) | 2007-09-04 | 2007-09-04 | Duplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101383628A true CN101383628A (en) | 2009-03-11 |
Family
ID=40463281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101213293A Pending CN101383628A (en) | 2007-09-04 | 2007-09-04 | Duplexer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101383628A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811054A (en) * | 2016-05-31 | 2016-07-27 | 广东欧珀移动通信有限公司 | Method and device for debugging convergence of duplexers |
| CN108680883A (en) * | 2018-03-22 | 2018-10-19 | 中国科学院合肥物质科学研究院 | A kind of high-isolation active radio frequency duplexer for condensed state nuclear magnetic resonance |
| CN111512558A (en) * | 2017-10-20 | 2020-08-07 | 弗劳恩霍夫应用研究促进协会 | Full duplex transceiver device |
-
2007
- 2007-09-04 CN CNA2007101213293A patent/CN101383628A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811054A (en) * | 2016-05-31 | 2016-07-27 | 广东欧珀移动通信有限公司 | Method and device for debugging convergence of duplexers |
| CN105811054B (en) * | 2016-05-31 | 2018-09-07 | 广东欧珀移动通信有限公司 | Debug the convergent method and device of duplexer |
| CN111512558A (en) * | 2017-10-20 | 2020-08-07 | 弗劳恩霍夫应用研究促进协会 | Full duplex transceiver device |
| CN111512558B (en) * | 2017-10-20 | 2023-03-10 | 弗劳恩霍夫应用研究促进协会 | Full duplex transceiver device |
| CN108680883A (en) * | 2018-03-22 | 2018-10-19 | 中国科学院合肥物质科学研究院 | A kind of high-isolation active radio frequency duplexer for condensed state nuclear magnetic resonance |
| CN108680883B (en) * | 2018-03-22 | 2020-09-08 | 中国科学院合肥物质科学研究院 | High-isolation active radio frequency duplexer for condensed nuclear magnetic resonance |
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Addressee: Fu Yi Document name: Notification of Publication of the Application for Invention |
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Application publication date: 20090311 |