CN102523061B - The control device of two-way radio-frequency signal - Google Patents
The control device of two-way radio-frequency signal Download PDFInfo
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- CN102523061B CN102523061B CN201110453248.XA CN201110453248A CN102523061B CN 102523061 B CN102523061 B CN 102523061B CN 201110453248 A CN201110453248 A CN 201110453248A CN 102523061 B CN102523061 B CN 102523061B
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Abstract
The control device of two-way radio-frequency signal forms full frequency band signal downlink access by the first microwave radio signaling switch, bypass module, first filter, amplifier and burster；After second microwave radio signaling switch and second filter are sequentially connected, between first microwave radio signaling switch input terminal and the output terminal of bypass module, the second microwave radio signaling switch, second filter, amplifier and burster form the first frequency-division section downlink；After third microwave radio signaling switch and third wave filter are sequentially connected, the amplifier out and the first microwave radio signaling switch input terminal are connected in parallel on, burster, third microwave radio signaling switch and third wave filter form the second frequency-division section uplink；First microwave radio signaling switch, the second microwave radio signaling switch and third microwave radio signaling switch are controlled by switching switch and are connected, and realize the Comprehensive Control of two-way radio-frequency signal.
Description
Technical field
The invention belongs to radiofrequency signal process fields, and in particular to a kind of control device of two-way radio-frequency signal.
Background technology
The abbreviation of DVB, digital video broadcasting Digital Video Broadcasting, are by the one of DVB project maintenances
The DTV Open Standard of serial international recognition.DVB system transmission modes have following several：Satellite (DVB-S and DVB-S2)；
Wired (DVB-C)；Terrestrial wireless (DVB-T)；Hand-held terrestrial wireless (DVB-H).The main distinction of these transmission modes is to make
Modulation system, because the requirement of the different frequency bandwidths that they are applied is different.QPSK is used using the DVB-S of high frequency carrier
Modulation system using the DVB-C of low frequency carrier signal using QAM-64 modulation systems, and utilizes the DVB-T of VHF and UHF carrier waves to use
COFDM modulation systems DVB-S (ETS 300 421) is digital broadcasting satellite system standard.Satellite transmission is with broad covered area, section
The features such as mesh capacity is big.The modulation of data flow modulates (QPSK) mode, working frequency 11/12GHz using four phase shift keying.
When using MPEG-2MP@ML forms, if user terminal reaches 601 studio qualities of CCIR, code check 9Mb/s；Reach PAL matter
Amount, code check 5Mb/s.One 54MHz transponders transfer rate is up to 68Mb/s, the multiplexing available for multiple programs.DVB-S is marked
Standard is almost that all satellite broadcast digital television systems are used.China has also selected DVB-S standard.
DVB-T is writing a Chinese character in simplified form for (DVB-Terrestrial), is called terrestrial wireless, is called terrestrial microwave conveying.DVB-S is
(DVB-Cable) write a Chinese character in simplified form, is called coaxial cable carrier wave wireless, is called the conveying of coaxial cable carrier wave microwave.Countries in the world at present
Satellite direct-seeding TV system in, generally use more satellite RF signal shift switch application DVB-S system (practical respective frequencies
Range：950MHz~2450MHz) and DVB-T systems (common signal frequency of use range：47MHz~862MHz also has portion
Region-by-region has been applied to 5MHz~862MHz) signal combination and distribution control on.It is produced recently as DVB-C (+HFC) system
The continuous extension of product value-added service, video on demand (VOD, i.e. radiofrequency signal circuit are returned) function is in countries in the world using increasingly
Extensively.Due to the upload frequencies ranging from 5-65MHZ that video on demand uses, inevitably frequency will be used with DVB-T systems
The rate section frequency of occurrences is overlapped.Current solution is selection parallel transmission at present, but due to the downlink radio frequency of DVB-T systems
Transmission loss of the signal in coaxial cable is larger, it is often necessary to by more satellite RF signal shift switch or arbitrary same section
The equipment of point, follow-up signal transmission, requirement could be met by providing the compensation function of increase signal gain.Just because of circuit
In signal gain compensation circuit to the signal gain of DVB-T downlink signals, formed in DVB-T and DVB-C frequency laps
The phenomenon that forward and reverse feed cycle amplifies and leads to the unbalance of amplifying unit circuit, cause system signal self-excitation often, makes
Occur irregular fluctuation in radio signal transmission, influence signal quality.
Invention content
The defects of it is an object of the invention to overcome the prior art, provides a kind of control device of two-way radio-frequency signal, should
Control device is compatible with forward direction DVB-T system descendings radiofrequency signal and reversed DVB-C (+HFC) system product value-added service video point
The parallel transmission of multicast function radiofrequency signal, and it is avoided that system signal self-excitation problem caused by two-way feed cycle amplification.
Realizing the object of the invention technical solution is：The control device of two-way radio-frequency signal is opened by the first microwave radio signal
Pass, bypass module, first filter, amplifier and burster composition full frequency band signal downlink access；Second microwave radio signal
After switch and second filter are sequentially connected, between the first microwave radio signaling switch input terminal and the output terminal of bypass module,
Second microwave radio signaling switch, second filter, amplifier and burster form the first frequency-division section downlink；Third microwave
After RF signal switch and third wave filter are sequentially connected, it is connected in parallel on the amplifier out and the first microwave radio signal is opened
Input terminal is closed, burster, third microwave radio signaling switch and third wave filter form the second frequency-division section uplink；First is micro-
Wave RF signal switch, the second microwave radio signaling switch and third microwave radio signaling switch are led by switching switch control
Logical, there are two types of location status, positions 1 for the tool of switching switch：When first microwave radio signaling switch is opened, the second microwave radio letter
Number switch and third microwave radio signaling switch close；Position 2：Second microwave radio signaling switch and third microwave radio signal
Switch is opened, and the first microwave radio signaling switch is closed；Under 1 state of position, the full frequency band signal downlink access conducting, entirely
Frequency band signals are successively by the first microwave radio signaling switch, first filter, amplifier, until burster exports；In 2 shape of position
Under state, the first frequency-division section downlink and the conducting of the second frequency-division section uplink, the first frequency dividing segment signal is successively by the
Two microwave radio signaling switches, second filter, amplifier, until burster exports, meanwhile, the second frequency dividing segment signal passes through successively
Burster, third microwave radio signaling switch and the output of third wave filter.
In above-mentioned technical proposal, microwave radio signaling switch, control letter are set in more satellite RF signal shift switch
Number transmission range, control the opening and closing of control switch for radio-frequency signal by switching switch, and then control return path signal
Access and open circuit.
The first, second, and third microwave radio signaling switch preferably using pin diode switch, passes through switching switch
The break-make characteristic of each PIN diode electric current is controlled, is combined into control switch for radio-frequency signal to control the access of return path signal
And open circuit.When stirring switching switch selection path, make to meet certain electric current in PIN diode and pass through, conducting PIN diode makes
Obtaining radiofrequency signal can pass through, and when toggle switch selection is breaking, without overcurrent, PIN diode blocks radiofrequency signal that cannot pass through.
The frequency range of the first filter is 5-862MHZ, and the frequency range of the second filter is 87-
862MHZ, the frequency range of the third wave filter is 5-65MHZ.Positive DVB-T system descendings radiofrequency signal, that is, system is just
To feed, there are two signal paths, and first is 5-862MHZ, the other is filtering is truncated into 87-862MHZ signal paths.
The uplink feed signal of DVB-C (+HFC) system is filtered into the signal path of 5-65MHZ.In this way, when toggle switch selection is logical
Lu Shi can be controlled simultaneously in the 87-862MHZ radiofrequency signals and reversed DVB-C (+HFC) system of positive DVB-T system descendings
Capable 5-65MHZ signal paths when stirring switching switch selection open circuit, control forward direction DVB-T system descending full range segment signals
The access of 5-862MHZ.Pass through the 87-862MHZ DVB-T system descendings radiofrequency signals and 5- of signal gain amplifying circuit in this way
65MHz DVB-C (+HFC) system uplink signals realize the Comprehensive Control of two-way radio-frequency signal with regard to Lothrus apterus.The invention makes more
Satellite RF signal shift switch can compatible with DVB-S system and DVB-T systems, also can compatible with DVB-C (+HFC) system, you can
Suitable for DVB-S+DVB-T+DVB-C (+HFC) hybrid network, make the application of product in systems more flexible, other corollary equipments
Input it is less, save system investment cost.
The beneficial effects of the present invention are：
(1) industry of rising in value to positive DVB-T signal systems downlink radio-frequency signal and reversed DVB-C (+HFC) system product is provided
The solution of the parallel transmission for video on-demand function radiofrequency signal of being engaged in avoids system self-excitation caused by two-way feed cycle amplification
Problem；
(2) invention make more satellite RF signal shift switch can compatible with DVB-S system and DVB-T systems, also can be simultaneous
Hold DVB-C (+HFC) system, you can suitable for DVB-S+DVB-T+DVB-C (+HFC) hybrid network, make product in systems
Using more flexible, the input of other corollary equipments is less, saves system investment cost.
Description of the drawings
Fig. 1 is the structure diagram of the control device of the two-way radio-frequency signal of the embodiment of the present invention 1.
In figure：The first pin diode switches of 1-, 2- bypass modules, 3- first filters, 4- amplifiers, 5- bursters, 6-
Second pin diode switch, 7- second filters, 9- thirds pin diode switch, 8- thirds wave filter, 10- bi-directional RFs letter
Number control device.
Specific embodiment
It is described further with reference to embodiment and attached drawing.
As shown in Figure 1, the control device 10 of two-way radio-frequency signal, by the first pin diode switch 1, bypass module 2,
One wave filter 3, amplifier 4 and burster 5 form full frequency band signal downlink access；Second pin diode switch 6 and the second filtering
After device 7 is sequentially connected, it is connected in parallel between 1 input terminal of the first pin diode switch and the output terminal of bypass module 2, the 2nd PIN bis-
Pole pipe switch 6, second filter 7, amplifier 4 and burster 5 form the first frequency-division section downlink；Third PIN diode is opened
After pass 8 and third wave filter 9 are sequentially connected, it is connected in parallel between 1 input terminal of 4 output terminal of amplifier and the first pin diode switch,
Burster 5, third pin diode switch 8 and third wave filter 9 form the second frequency-division section uplink.Wherein, first filter
Frequency range be 5-862MHZ, the frequency range of second filter is 87-862MHZ, and the frequency range of third wave filter is 5-
65MHZ。
First pin diode switch 1, the second pin diode switch 6 and third pin diode switch 8 pass through switching switch
Control conducting, there are two types of location status, as shown in table 1, position 1 for the tool of switching switch：When first pin diode switch 1 is opened,
Second pin diode switch 6 and third pin diode switch 9 are closed；Position 2：Second pin diode switch 6 and the 3rd PIN
Diode switch 9 is opened, and the first pin diode switch 1 is closed；Under 1 state of position, the conducting of full frequency band signal downlink access,
Full range segment signal is successively by the first pin diode switch 1, bypass module 2, first filter 3, amplifier 4, until burster 5
Export 5-862MHZ radiofrequency signals；Under 2 state of position, the first frequency-division section downlink and the second frequency-division section uplink are led
Logical, the first frequency dividing segment signal is successively by the second pin diode switch 6, second filter 7, amplifier 4, until burster 5 exports
87-862MHZ radiofrequency signals, meanwhile, the second frequency dividing segment signal passes through burster 5, third pin diode switch 9 and third successively
Wave filter 8 exports 5-65MHZ radiofrequency signals.
Table 1
The SS12F09 types of three macro Electronics Co., Ltd. of Dongguan City production is selected to toggle switch as switching in the present embodiment to open
The combination with first, second, and third PIN diode is closed, to realize the break-make of signal.Microwave toggle switch controls PIN diode
The break-make characteristic of electric current is combined into control switch for radio-frequency signal to control the access of return path signal and open circuit.Toggle switch
During selection path, making to meet certain electric current in PIN diode and pass through, conducting PIN diode allows radiofrequency signal to pass through,
During toggle switch selection open circuit, without overcurrent, PIN diode blocks radiofrequency signal that cannot pass through.
Claims (3)
1. the control device of two-way radio-frequency signal, it is characterized in that, the device by the first microwave radio signaling switch, bypass module,
First filter, amplifier and burster composition full frequency band signal downlink access；Second microwave radio signaling switch and the second filter
After wave device is sequentially connected, between the first microwave radio signaling switch input terminal and the output terminal of bypass module, the second microwave radio
Signaling switch, second filter, amplifier and burster form the first frequency-division section downlink；Third microwave radio signaling switch
After being sequentially connected with third wave filter, the amplifier out and the first microwave radio signaling switch input terminal are connected in parallel on, point
Group device, third microwave radio signaling switch and third wave filter form the second frequency-division section uplink；First microwave radio signal
Switch, the second microwave radio signaling switch and third microwave radio signaling switch are controlled by switching switch and are connected, switching switch
Tool there are two types of location status, position 1：When first microwave radio signaling switch is opened, the second microwave radio signaling switch and the
Three microwave radio signaling switches are closed；Position 2：Second microwave radio signaling switch and third microwave radio signaling switch are opened,
First microwave radio signaling switch is closed；Under 1 state of position, the full frequency band signal downlink access conducting, full range segment signal
Successively by the first microwave radio signaling switch, first filter, amplifier, until burster exports；Under 2 state of position, institute
The first frequency-division section downlink and the conducting of the second frequency-division section uplink are stated, the first frequency dividing segment signal is penetrated successively by the second microwave
Frequency signaling switch, second filter, amplifier, until burster export, meanwhile, second frequency dividing segment signal successively by burster,
Third microwave radio signaling switch and the output of third wave filter.
2. the control device of two-way radio-frequency signal according to claim 1, it is characterized in that, the first microwave radio signal
Switch, the second microwave radio signaling switch and third microwave radio signaling switch use pin diode switch.
3. the control device of two-way radio-frequency signal according to claim 1, it is characterized in that, the frequency of the first filter
Range is 5-862MHZ, and the frequency range of the second filter is 87-862MHZ, and the frequency range of the third wave filter is
5-65MHZ。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110453248.XA CN102523061B (en) | 2011-12-30 | 2011-12-30 | The control device of two-way radio-frequency signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110453248.XA CN102523061B (en) | 2011-12-30 | 2011-12-30 | The control device of two-way radio-frequency signal |
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| Publication Number | Publication Date |
|---|---|
| CN102523061A CN102523061A (en) | 2012-06-27 |
| CN102523061B true CN102523061B (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110453248.XA Active CN102523061B (en) | 2011-12-30 | 2011-12-30 | The control device of two-way radio-frequency signal |
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| CA2952062C (en) | 2014-06-16 | 2020-09-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and entity in tdd radio communications |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101610067A (en) * | 2009-06-10 | 2009-12-23 | 东南大学 | Frequency mixer |
| CN101867350A (en) * | 2009-04-17 | 2010-10-20 | 杭州中科微电子有限公司 | Zero-intermediate-frequency/low-intermediate-frequency configurable variable gain amplifier |
| CN202406116U (en) * | 2011-12-30 | 2012-08-29 | 江苏苏美达机电有限公司 | Device for controlling bidirectional radio frequency signals |
-
2011
- 2011-12-30 CN CN201110453248.XA patent/CN102523061B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867350A (en) * | 2009-04-17 | 2010-10-20 | 杭州中科微电子有限公司 | Zero-intermediate-frequency/low-intermediate-frequency configurable variable gain amplifier |
| CN101610067A (en) * | 2009-06-10 | 2009-12-23 | 东南大学 | Frequency mixer |
| CN202406116U (en) * | 2011-12-30 | 2012-08-29 | 江苏苏美达机电有限公司 | Device for controlling bidirectional radio frequency signals |
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| CN102523061A (en) | 2012-06-27 |
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