CN1917377B - Remote controlled self-turned mixer - Google Patents
Remote controlled self-turned mixer Download PDFInfo
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- CN1917377B CN1917377B CN2006100883700A CN200610088370A CN1917377B CN 1917377 B CN1917377 B CN 1917377B CN 2006100883700 A CN2006100883700 A CN 2006100883700A CN 200610088370 A CN200610088370 A CN 200610088370A CN 1917377 B CN1917377 B CN 1917377B
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- isolator
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Abstract
The invention comprises multichannel carrier-frequency; the carrier -frequency in each channel are respectively connected to the isolator, detector, media filter and controller. It features an isolator that is a dual-junction isolator composed of two single-junction isolators with high isolation level; a coupled signal sensor is set at inside of the isolator to detect the inputted signals and the frequency of the inputted signals; the detector detects the echo return loss from the input port of the cavity and sends the result to the tuning circuit of the control unit. It uses a medium resonant cavity which can cut down the size of resonator to 1/6-1/10 of the general cavity, and keep high Q value.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of base station remote controlled self-turned mixer.
Background technology
Mixer is that signal that a plurality of single channel transmitter is produced is merged into and leads up to feeder line and be sent to antenna and launch, and is imperative equipment in the base station system, can cut operating costs significantly and the complexity of system.Usually can be divided into two kinds to mixer: broadband mixer and arrowband mixer.The broadband mixer can synthesize the signal of a plurality of different wideband sections, and the filter cell of arrowband mixer generally only is tuned on certain frequency, and its working band is very narrow.Inserting loss is the important indicator that characterizes the mixer service behaviour, its be meant signal from the main line input to the loss the main line output, promptly incoming signal level and output signal level is poor, represents with dB.
The benefit of broadband synthesis mode is to support the radio frequency frequency modulation technology to support the baseband hopping technology simultaneously again.But can bring very high insertion loss.For example the synthetic loss minimum of inserting of two-way reaches 3dB, and four the tunnel insert the loss minimum reaches 6dB, and therefore in the GSM base station equipment, when the multi-channel rf signal was synthetic, the broadband mixer also was not suitable for the base station scheme that overloading disposes frequently.
The arrowband mixer utilizes air chamber or dielectric cavity as closing the road cavity, utilizes its arrowband high Q value characteristic, can realize very little insertion loss, and for example six road radio frequencies are synthetic, and its Insertion Loss is less than 3dB.So in the multi-user area, can finish the synthetic of multiple signals easily under the situation of less Insertion Loss, for example 4 to 12 road signals is synthetic.
Mixer is divided into tunable formula mixer or nonresonant formula mixer again.Tunable formula mixer is meant by can change the response characteristic of each filter unit in the mixer to the adjusting of tuning device.Nonresonant formula mixer is meant the response characteristic of each filter unit in case determine just can't change.Tunable formula mixer can be divided into manual tuning and automatic tuning according to tuning manner.So-called manual tuning was meant before placing the working site and artificially tuned frequency is configured according to applied occasion.If tranmitting frequency changes, then need manually to arrive in person the on-the-spot mixer unit of changing.Automatic tuning then is that to utilize control system and stepping motor at the scene the operating frequency of mixer to be carried out real-time tuning.
Generally, mixer by regularly be tuned to the tranmitting frequency of radio transmitter.Therefore, if mixer is not changed or retuned, be the tranmitting frequency that can not change transmitter.
Chang Yong mixer only accomplishes that generally 2 close 1 or 4 unifications in the market, and it is bigger to insert loss, 4 close typical case's insertion loss in 1 o'clock reaches 6 dB, therefore when telephone traffic is very big when needing overloading to dispose frequently, with 12 carrier frequency in each sector is example, the every sector of its reponse system just needs 3 surface launching antennas, 3 feeder lines, and the Frequent Filters median filter generally adopts air dielectric in addition, its Q value is relatively low, need more rack, floor space increases, and the most important thing is, common mixer is coordinated fixed-frequency, when great change appears in frequency planning, need the on-the-spot mixer unit of changing, very inconvenience.
Summary of the invention
The purpose of this invention is to provide a kind of remote controlled self-turned mixer, it can realize utilizing control system and stepping motor at the scene to mixer automatic tuning.
The technical scheme that realizes described purpose is:
Remote controlled self-turned mixer comprises the multichannel carrier frequency, wherein each road carrier frequency links to each other with isolator, detector, dielectric filter, controller respectively, it is characterized in that the binode isolator of described isolator for forming by the unijunction isolator of two high-isolations, it is provided with the coupled signal sensing probe in isolator inside, can detect frequency that has or not input signal, input signal etc.Because this isolator has higher isolation (greater than 52dB),, protected linear power amplifier so can effectively the reflected signal of being come by filter be isolated.
Described detector adopts the return loss of test chamber input port and result transmission is arrived the tuning circuit of control unit.A detector can detect two cavitys, and is switched by the switch time-division at input port, realizes selecting frequency characteristic by heterodyne circuit, the variation that this just can realize scanning automatically and detect tranmitting frequency.The flip-flop that has comprised input signal strength in the output signal of detector is the incident and the reflection power of cavity, and a plurality of detector can connect together.
Described controller is furnished with microprocessor, by software Hyterminal, and tc+, trocomm carries out emulation, handles from the detector reading of data and to data, exports the rotation that a signal is used for the control step motor, regulates the resonance frequency of dielectric filter.
Described dielectric filter is the core cell of mixer, wherein comprises tuner, and cavity is a dielectric cavity, has temperature-frequency compensation function.Can reach smaller volume and the insertion loss littler than air cavity.Each input of cavity is equipped with circulator, and its reflector port is connected with forward direction and reverse coupler, is used to measure the signal reflex situation (return loss) of each cavity, and is connected on the detector of microprocessor control.The corresponding carrier frequency of dielectric filter can be realized selecting frequency characteristic by the tuned frequency that changes dielectric filter.
The invention has the advantages that: have the far-end coordination function of remote monitoring, control, volume is little, can conserve space, change frequency, exchange device more during coordinate frequency.
Description of drawings
Fig. 1 is a structural representation of the present invention
1. isolator 2. dielectric filters 3. detectors 4. controllers
Embodiment
As shown in Figure 1, the present invention is made up of isolator, detector, controller, dielectric filter four parts.Wherein:
1) isolator: the binode isolator by the unijunction isolator of two high-isolations is formed.This isolator is different with general isolator, is characterized in having introduced the coupled signal sensing probe in isolator inside, and it can detect frequency that has or not input signal, input signal etc.Isolator is connected with high power load, and it can bear big power signal.Because this isolator has higher isolation (greater than 52dB),, protected linear power amplifier so can effectively the reflected signal of being come by filter be isolated.
2) detector: tuning detector is the tuning circuit that is used for the return loss of test chamber input port and result transmission is arrived control unit.A detector can detect two cavitys, and is switched by the switch time-division at input port, realizes selecting frequency characteristic by heterodyne circuit, the variation that this just can realize scanning automatically and detect tranmitting frequency.Comprised the flip-flop (incident of cavity and reflection power) of input signal strength in the output signal of detector, a plurality of detectors can connect together.
3) controller: controller is the device of working condition of the tuning and mixer of monitoring cavity, by the transducer in the isolator power signal is detected, the signal that detects compares with the signal of fixing, carry out processing and amplifying, detect the return loss of cavity input port by tuning detector when frequency, and with result transmission to the tuning circuit of control unit, realize automatic scan and detect the variation of tranmitting frequency.Controller is furnished with microprocessor, by software Hyperterminal, and pc+, trocomm carries out emulation, handles from the detector reading of data and to data, exports the rotation that a signal is used for the control step motor, regulates the resonance frequency of dielectric filter.The control step motor is adjusted frequency, and the step-length of stepping motor was 1.8 steps, and frequency is 8～10k.Software is stored in the PROM-flash memory, can download by control bus (RS232, RS458, CAN).Mixer state (motor position, tuning state and alarm status) can be stored in the eeprom memory, that is to say that mixer shutdown back tuning state also can preserve.
4) dielectric filter: dielectric filter is the core cell of mixer, wherein comprises tuner, and its cavity is a dielectric cavity, has temperature-frequency compensation function, can reach smaller volume and the insertion loss littler than air cavity.Each input of cavity is equipped with circulator, and its reflector port is connected with forward direction and reverse coupler, is used to measure the signal reflex situation (return loss) of each cavity, and is connected on the detector of microprocessor control.The corresponding carrier frequency of dielectric filter can be realized selecting frequency characteristic by the tuned frequency that changes dielectric filter.By stepper motor automatic tuning, the pairing Frequency point in the upper end of transducer is the tuning reference point after calibration.Because this cavity mixer has been done temperature-compensating, so the internal temperature stability of characteristics, promptly the tuning point of mixer can not vary with temperature when tuning circuit is closed.
The present invention adopts dielectric resonant chamber, can make the size of resonator drop to 1/6 to 1/10 of conventional cavity resonator, and the Q value is higher, can increase the isolation between the carrier frequency; The interpolation loss is also smaller, can make from the signal of Linear Power Amplifier and be transferred to transmitting antenna with the loss of minimum, and by far-end control, makes the tuned frequency of each carrier frequency of mixer consistent with frequency input signal all the time.
Claims (4)
1. remote controlled self-turned mixer, it comprises the multichannel carrier frequency, wherein each road carrier frequency links to each other with isolator, detector, dielectric filter, control unit respectively, it is characterized in that the binode isolator of described isolator for being made up of the unijunction isolator of two high-isolations, it is provided with the coupled signal sensing probe in isolator inside; Described detector adopts the return loss of test chamber input port and result transmission is arrived the tuning circuit of control unit; Described control unit is furnished with microprocessor, adopts software Hyterminal, tc+, and trocomm carries out emulation, with signal that detects and the signal of fixing relatively, carries out processing and amplifying; Described dielectric filter is the core cell of mixer, wherein comprises tuner, and cavity is a dielectric cavity, and each input of cavity is equipped with circulator, and its reflector port is connected with forward direction and reverse coupler, and is connected on the detector of microprocessor control.
2. a kind of remote controlled self-turned mixer according to claim 1 is characterized in that a plurality of detectors connect together.
3. a kind of remote controlled self-turned mixer according to claim 1 is characterized in that detector detects two cavitys, is switched by the switch time-division at input port, realizes selecting frequency characteristic by heterodyne circuit.
4. a kind of remote controlled self-turned mixer according to claim 1 is characterized in that the software of described control unit is stored in the PROM-flash memory, downloads by control bus; The mixer state storage is in eeprom memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100883700A CN1917377B (en) | 2006-07-14 | 2006-07-14 | Remote controlled self-turned mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100883700A CN1917377B (en) | 2006-07-14 | 2006-07-14 | Remote controlled self-turned mixer |
Publications (2)
| Publication Number | Publication Date |
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| CN1917377A CN1917377A (en) | 2007-02-21 |
| CN1917377B true CN1917377B (en) | 2010-10-06 |
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| CN2006100883700A Expired - Fee Related CN1917377B (en) | 2006-07-14 | 2006-07-14 | Remote controlled self-turned mixer |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291504B (en) * | 2007-04-19 | 2011-11-30 | 中兴通讯股份有限公司 | Testing device and debugging method for coupling sensitivity of mobile terminal |
| CN101814963A (en) * | 2010-02-25 | 2010-08-25 | 飞创(苏州)电讯产品有限公司 | Automatic microwave electronic adjustable loading device and detection method thereof |
| US9531418B2 (en) | 2012-08-07 | 2016-12-27 | Google Technology Holdings LLC | Tunable inter-antenna isolation |
| WO2016151376A1 (en) * | 2015-03-20 | 2016-09-29 | Andrew Wireless Systems Gmbh | Module for combining signals having different frequencies |
| CN105703044B (en) * | 2016-04-18 | 2017-02-22 | 丹凤常兴科技实业有限公司 | Automatic tuning combiner |
| CN109256610A (en) * | 2018-10-11 | 2019-01-22 | 深圳市诺信博通讯有限公司 | A kind of circuit control system of electricity tunable combiner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2369423Y (en) * | 1999-03-26 | 2000-03-15 | 哈瀛碧 | Multiplexer with isolator at output |
| EP1282258A1 (en) * | 2001-08-02 | 2003-02-05 | Mitsubishi Electric Information Technology Centre Europe B.V. | Method and apparatus for synchronising receivers |
| CN2669536Y (en) * | 2004-01-01 | 2005-01-05 | 摩比天线技术（深圳）有限公司 | Narrow band radio frequency front end merging device |
-
2006
- 2006-07-14 CN CN2006100883700A patent/CN1917377B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2369423Y (en) * | 1999-03-26 | 2000-03-15 | 哈瀛碧 | Multiplexer with isolator at output |
| EP1282258A1 (en) * | 2001-08-02 | 2003-02-05 | Mitsubishi Electric Information Technology Centre Europe B.V. | Method and apparatus for synchronising receivers |
| CN2669536Y (en) * | 2004-01-01 | 2005-01-05 | 摩比天线技术（深圳）有限公司 | Narrow band radio frequency front end merging device |
Non-Patent Citations (1)
| Title |
|---|
| CN 2669536 Y,全文. |
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| CN1917377A (en) | 2007-02-21 |
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Granted publication date: 20101006 Termination date: 20130714 |