CN111817837A - Multi-communicator network synthesis method - Google Patents
Multi-communicator network synthesis method Download PDFInfo
- Publication number
- CN111817837A CN111817837A CN202010596035.1A CN202010596035A CN111817837A CN 111817837 A CN111817837 A CN 111817837A CN 202010596035 A CN202010596035 A CN 202010596035A CN 111817837 A CN111817837 A CN 111817837A
- Authority
- CN
- China
- Prior art keywords
- frequency band
- loss
- admittance
- frequency
- 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.)
- Granted
Links
- 238000001308 synthesis method Methods 0.000 title claims abstract description 7
- 238000004458 analytical method Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000003786 synthesis reaction Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Filters And Equalizers (AREA)
- Transceivers (AREA)
Abstract
The invention relates to the technical field of multi-communicator, in particular to a multi-communicator network synthesis method, which comprises the following steps: (1) defining the impedance analysis of any frequency band of the filter, and setting n frequency bands, so that the input impedance of the frequency band is Zin(ii) a (2) Define the intrinsic loss FIL (dB); (3) defining leakage loss LIL (dB); (4) calculating a low leakage loss region according to the inherent loss and the leakage loss; (5) inputting frequency band into impedance Z by phase shiftinginMoving into a low leakage loss region; (6) setting each frequency band filter at the ANT end of the multi-channel device to be equivalent to an input impedance; (7) selecting the center frequency of each frequency band as an analysis point, and setting the admittance as Ynm (Gnm + jBnm), wherein n is the frequency band of the filter, and m is the frequency band frequency; (8) a matching element is connected in parallel at the ANT end of the multi-communicator; (9) through phase shifting, the impedance of the frequency band filter meets the admittance constraint equation, so that the filters of all frequency bands at the ANT end can share the same matching network.
Description
Technical Field
The invention relates to the technical field of multi-communicator networks, in particular to a network synthesis method of a multi-communicator network.
Background
Carrier Aggregation (CA) is a key technology in current LTE-a, and can significantly improve peak rate. CA is to aggregate multiple component carriers together to achieve a larger transmission bandwidth to improve uplink and downlink transmission rates, so that a multi-carrier including multiple filters plays an important role in a mobile communication radio frequency front end, and spectrum resources allocated by operators in different areas are different, so that there are multiple aggregation modes.
Most of the multi-signal devices currently in use are formed by combining single filters on a circuit, and in many occasions, flexible switching of CA frequency band combination is also required. Therefore, it is very difficult to perform joint optimization during designing of the multi-channel device, and therefore, a design method needs to be researched to reduce the influence of filter synthesis on indexes such as insertion loss, return loss and the like of each frequency band.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a multi-messenger network synthesis method.
In order to achieve the purpose, the invention provides the following technical scheme: a multi-communicator network synthesis method comprises the following steps:
(1) defining the impedance analysis of any frequency band of the filter, and setting n frequency bands, so that the input impedance of the frequency band is Zin；
(2) Define the intrinsic loss FIL (dB);
(3) defining leakage loss LIL (dB);
(4) calculating a low leakage loss region according to the inherent loss and the leakage loss;
(5) inputting frequency band into impedance Z by phase shiftinginMoving into a low leakage loss region;
(6) setting each frequency band filter at the ANT end of the multi-channel device to be equivalent to an input impedance;
(7) selecting the center frequency of each frequency band as an analysis point, and setting the admittance as Ynm (Gnm + jBnm), wherein n is the frequency band of the filter, and m is the frequency band frequency;
(8) according to the calculation process, a matching element is connected in parallel at the ANT end of the multi-communicator;
(9) through phase shifting, the impedance of the frequency band filter meets the admittance constraint equation, so that the filters of all frequency bands at the ANT end can share the same matching network.
Preferably, according to step (2), the intrinsic loss fil (db) is the self-loss of the device, which is calculated by:
preferably, according to step (3), the leakage loss LIL (dB) is the multiplexer ZinThe energy loss caused by the frequency band filter and the leakage loss are the difference between the inherent losses after the frequency band filter is synthesized and before the frequency band filter is synthesized, and the calculation mode is as follows:
LIL(dB)＝FIL'(dB)-FIL(dB)。
preferably, according to step (4), the loss is defined as a low leakage loss region with a loss less than a certain value according to the requirement, the loss result is calculated by the inherent loss fil (db) and the leakage loss lil (db), and the low leakage loss region is plotted on the smith chart.
Preferably, according to steps (6) to (8), the matching element is set to be an inductor or a capacitor, i.e. the admittance is: jBn(ii) a Then there is a frequency band admittance:
wherein, Y0Is the characteristic admittance;
after setting synthesis and matching, the admittance of the central frequency point is equal to the characteristic admittance, then,
preferably, in order to enable the combined multi-signal devices to share the same parallel matching network, the sum of the admittance imaginary parts of each frequency band filter and other frequency band filters in the frequency band and the matching circuit is required to approach 0.
Preferably, when the matching element is an inductor, B ═ 1/jwL;
when the matching element is a capacitor, B — jwc;
according to the setting of the matching element, namely the admittance constraint equation:
wherein, wnAnd (3) for the central angle frequency and the over-phase shift of the nth frequency band filter, the impedance of each frequency band filter meets the admittance constraint equation (5), so that the filters of each frequency band at the ANT end can share the same matching network.
Compared with the prior art, the invention has the beneficial effects that: by shifting phase ZinEntering a low leakage loss area to solve signal leakage; the common impedance matching network is solved by an admittance constraint equation.
Drawings
FIG. 1 is a schematic diagram of a multi-communicator architecture;
FIG. 2 is an equivalent structure of a multi-communicator;
FIG. 3 is a Smith chart low leakage loss region of the present invention;
fig. 4 is an equivalent circuit of the ANT terminal of the multi-communicator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The multi-channel device used in the terminal is mostly in the Rx frequency band, and has a structure as shown in fig. 1, and when the multi-channel device is operated, signals are input from the Antenna to the common terminal, so the multi-channel device is called an Antenna terminal (ANT). The rest ports are all output ends, and signals with different frequencies are output from ports with different frequency bands. There are 2 main factors affecting the performance index of the multi-communicator after synthesis:
1) the signal energy of the nth (n is an arbitrary frequency band) frequency band is shunted to a filter out of the frequency band n, resulting in signal leakage and leakage loss. The relationship between leakage loss and band filter impedance is given so that leakage loss can be reduced as close as possible.
2) The nth (n is any frequency band) filter is influenced by the filter impedance outside the n frequency band, so that the impedance is mismatched and the return loss index is obtained. And impedance mismatch also causes increased reflection and thus increased insertion loss. Impedance matching is required so that the return loss is not deteriorated. After synthesis, each output end can be matched independently without mutual influence, and the problem of impedance mismatch does not exist. And ANT is a public end, the return loss of each frequency band can change, and a certain restriction relationship exists between the ANT and each frequency band, so that it is difficult to satisfy all the frequency bands by using a common matching network.
As shown in fig. 2, the impedance of any frequency band filter (n is selected here) is analyzed separately, and other frequency bands can be equivalent to an input impedance, which is hereinafter referred to as Zin。
From the above analysis, it can be seen that the multi-reporter synthesis mainly needs to solve ZinThe signal leakage and the ANT end share the impedance matching network. To this end, a design method is proposed, in which Z is brought about by phase shiftinginEntering a low leakage loss area to solve signal leakage; the common impedance matching network is solved by an admittance constraint equation.
The insertion loss of the device is caused by both port reflection and self-loss. For passive devices, port reflection can be improved by matching, self loss is an inherent characteristic of the device, and peripheral circuits are difficult to change. For ease of analysis, the intrinsic loss is defined as fil (db), then:
defining leakage loss LIL as multi-signal device ZinResulting in energy loss. And the leakage loss is the difference between the inherent losses of the synthesized frequency band filter and the synthesized frequency band filter, and then:
LIL(dB)＝FIL'(dB)-FIL(dB) (2)
the loss is defined as a low leakage loss region (0.5 dB is selected here, but not limited to 0.5dB according to different diplexer index requirements) with less than a certain value as required. The low leakage loss region is plotted on the smith chart according to equations (1), (2), as shown in fig. 3, where the shaded area is the low leakage loss region. It is known that the closer to the open point, the larger the low leakage loss region.
Therefore, when designing a multiplexer combination, the signal leakage can be improved by shifting Zin to the second leakage loss section in fig. 3 by phase shifting.
Each band filter at the ANT end of the multiplexer may be equivalent to an input impedance and they are in parallel relationship as shown in fig. 4.
For convenient analysis, the central frequency of each frequency band is selected as an analysis point, and the admittance is set as Ynm-Gnm + jBnm, wherein n is the frequency band of the filter, and m is the frequency band frequency. For example, Ynm is the admittance of the nth band filter at the center frequency of the m band. In order to simplify the matching circuit, the diplexer ANT is usually connected to only one matching element at most in parallel, and assuming an ideal inductance or capacitance, the admittance is: jBn. Then there is a frequency band admittance:
wherein, Y0Is the characteristic admittance. It is assumed here that after synthesis and matching, the center bin admittance is equal to the characteristic admittance. Then there are:
it can be seen that, in order to enable the multiple signal devices to share the same parallel matching network after synthesis, the sum of the admittance imaginary parts of each frequency band filter and other frequency band filters in the frequency band and the matching circuit needs to approach 0. If the impedance of the single filter is ideal before the multi-signal synthesizer synthesis or the synthesis requirement is well considered, the ANT end does not need to be matched. For the surface acoustic wave multi-channel transmitter, an ANT terminal usually needs a parallel matching element, and when an inductor is connected in parallel, B is 1/jwL; when capacitors are connected in parallel, B is jwc. Equation (4) is rewritten as:
wherein, wnIs the n-th band filter center angular frequency. Through phase shifting, the impedance of each frequency band filter meets the admittance constraint equation (5), so that the filters of each frequency band at the ANT end can share the same matching network.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A multi-communicator network synthesis method is characterized in that: the method comprises the following steps:
(1) defining the impedance analysis of any frequency band of the filter, and setting n frequency bands, so that the input impedance of the frequency band is Zin；
(2) Define the intrinsic loss FIL (dB);
(3) defining leakage loss LIL (dB);
(4) calculating a low leakage loss region according to the inherent loss and the leakage loss;
(5) inputting frequency band into impedance Z by phase shiftinginMoving into a low leakage loss region;
(6) setting each frequency band filter at the ANT end of the multi-channel device to be equivalent to an input impedance;
(7) selecting the center frequency of each frequency band as an analysis point, and setting the admittance as Ynm (Gnm + jBnm), wherein n is the frequency band of the filter, and m is the frequency band frequency;
(8) according to the calculation process, a matching element is connected in parallel at the ANT end of the multi-communicator;
(9) through phase shifting, the impedance of the frequency band filter meets the admittance constraint equation, so that the filters of all frequency bands at the ANT end can share the same matching network.
2. The method of claim 1, wherein: according to step (2), the intrinsic loss fil (db) is the self-loss of the device, and is calculated by:
3. the method of claim 2, wherein: according to step (3), the leakage loss LIL (dB) is the multiplexer ZinThe energy loss caused by the frequency band filter and the leakage loss are the difference between the inherent losses after the frequency band filter is synthesized and before the frequency band filter is synthesized, and the calculation mode is as follows:
LIL(dB)＝FIL'(dB)-FIL(dB)。
4. the method of claim 3, wherein the method comprises: according to step (4), defining the loss less than a certain value as a low leakage loss region according to the requirement, calculating the loss result through the inherent loss FIL (dB) and the leakage loss LIL (dB), and drawing the low leakage loss region on the Smith chart.
5. The method of claim 1, wherein: according to steps (6) to (8), the matching element is set to be an inductor or a capacitor, i.e. the admittance is: jBn(ii) a Then there is a frequency band admittance:
wherein, Y0Is the characteristic admittance;
after setting synthesis and matching, the admittance of the central frequency point is equal to the characteristic admittance, then,
6. the method of claim 5, wherein: in order to enable the combined multi-signal devices to share the same parallel matching network, the sum of the admittance imaginary parts of each frequency band filter and other frequency band filters in the frequency band and the matching circuit is required to approach 0.
7. The method of claim 6, wherein:
when the matching element is an inductor, B is 1/jwL;
when the matching element is a capacitor, B — jwc;
according to the setting of the matching element, namely the admittance constraint equation:
wherein, wnAnd (3) for the central angle frequency and the over-phase shift of the nth frequency band filter, the impedance of each frequency band filter meets the admittance constraint equation (5), so that the filters of each frequency band at the ANT end can share the same matching network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596035.1A CN111817837B (en) | 2020-06-28 | 2020-06-28 | Multi-messenger network synthesis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596035.1A CN111817837B (en) | 2020-06-28 | 2020-06-28 | Multi-messenger network synthesis method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111817837A true CN111817837A (en) | 2020-10-23 |
| CN111817837B CN111817837B (en) | 2024-01-09 |
Family
ID=72855476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010596035.1A Active CN111817837B (en) | 2020-06-28 | 2020-06-28 | Multi-messenger network synthesis method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111817837B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5802169A (en) * | 1996-04-11 | 1998-09-01 | Intervoice Limited Partnership | System and method for transmission system automatic impedance matching |
| US20080129411A1 (en) * | 2004-10-29 | 2008-06-05 | Steve Beaudin | Band Reject Filters |
| US20120169566A1 (en) * | 2009-09-07 | 2012-07-05 | Francis Chan Wai Po | Impedance matching method for a multiband antenna, and transmission or receiver channel having automatic matching |
| US20120256689A1 (en) * | 2011-04-07 | 2012-10-11 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Radiofrequency Emission or Reception Chain with Automatic Impedance Adaptation, and Corresponding Method |
| CN103731167A (en) * | 2013-12-20 | 2014-04-16 | 天津光电通信技术有限公司 | Method for rapidly tuning impedance matching of antenna tuner |
| CN104410381A (en) * | 2014-10-22 | 2015-03-11 | 江苏科技大学 | Lumped parameter dual-frequency impedance matching network |
-
2020
- 2020-06-28 CN CN202010596035.1A patent/CN111817837B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5802169A (en) * | 1996-04-11 | 1998-09-01 | Intervoice Limited Partnership | System and method for transmission system automatic impedance matching |
| US20080129411A1 (en) * | 2004-10-29 | 2008-06-05 | Steve Beaudin | Band Reject Filters |
| US20120169566A1 (en) * | 2009-09-07 | 2012-07-05 | Francis Chan Wai Po | Impedance matching method for a multiband antenna, and transmission or receiver channel having automatic matching |
| US20120256689A1 (en) * | 2011-04-07 | 2012-10-11 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Radiofrequency Emission or Reception Chain with Automatic Impedance Adaptation, and Corresponding Method |
| CN103731167A (en) * | 2013-12-20 | 2014-04-16 | 天津光电通信技术有限公司 | Method for rapidly tuning impedance matching of antenna tuner |
| CN104410381A (en) * | 2014-10-22 | 2015-03-11 | 江苏科技大学 | Lumped parameter dual-frequency impedance matching network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111817837B (en) | 2024-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9124355B2 (en) | Tunable notch filtering in multi-transmit applications | |
| US10128872B2 (en) | Enabling radio frequency multiplexing in a wireless system | |
| TWI660612B (en) | Circuits and methods related to radio-frequency receivers having carrier aggregation | |
| US10277259B2 (en) | Front-end circuit for simultaneous transmission and reception operation | |
| CA2413714C (en) | Adjustable electronic duplexer | |
| US9337991B2 (en) | Wireless communication unit, radio frequency module and method therefor | |
| CN103780278A (en) | Switched duplexer front end | |
| US9054774B2 (en) | Communication system and method for transmitting and receiving signals | |
| CN104798312A (en) | Transceiver front-end | |
| US8838045B2 (en) | Sub-band duplexer with active frequency tuning | |
| JP2015159546A (en) | circuit arrangement | |
| CN104113356B (en) | The method of wireless communication unit, radio-frequency module and tuning wireless communication unit | |
| US20230318646A1 (en) | Radio frequency system with tunable notch filters | |
| CN114095049B (en) | Radio frequency receiving and transmitting switch circuit, radio frequency front-end circuit and radio frequency transceiver | |
| KR100691134B1 (en) | Quadplexer | |
| CN103546173A (en) | Broadband receiver, anti-interference filter circuit of broadband receiver and implementation method of anti-interference filter circuit | |
| JP2021064874A (en) | High frequency module and communication device | |
| JP2012028896A (en) | Branching filter | |
| KR101443963B1 (en) | Electronic component | |
| CN111817837B (en) | Multi-messenger network synthesis method | |
| US20220385272A1 (en) | Switchable acoustic wave filter | |
| CN111342812A (en) | Filter with phase-shifting network module at two ports, duplexer and electronic equipment with filter | |
| CN110535449B (en) | Constant-resistance short-wave multiplexer | |
| JP3794897B2 (en) | Wireless communication device | |
| CN114826285A (en) | Duplex filter device with leakage eliminating function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |