CN201174693Y - Wideband low-loss phase splitter having lightning protection function - Google Patents
Wideband low-loss phase splitter having lightning protection function Download PDFInfo
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- CN201174693Y CN201174693Y CNU2008200930000U CN200820093000U CN201174693Y CN 201174693 Y CN201174693 Y CN 201174693Y CN U2008200930000 U CNU2008200930000 U CN U2008200930000U CN 200820093000 U CN200820093000 U CN 200820093000U CN 201174693 Y CN201174693 Y CN 201174693Y
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- phase splitter
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
The utility model discloses a wideband low-loss phase splitter with lightning protection function. The phase splitter comprises three ports, i.e. a Port 1, a Port 2 and a Port 3, a capacitor C 1, a capacitor C2, a resistor R1 and a radio frequency choking inductance L1 as well as a micro strip capacitor Line, a gas discharge tube G1 and a TVS catching diode D1, wherein the capacitor C 1 is connected between the Port 1 and the Port 2; the Port 3 is connected in series between the capacitor C 1 and the Port 2 through the resistor R1, the micro strip capacitor Line and the radio frequency choking inductance L1; the resistor R1 and a connecting end of the micro strip capacitor Line are grounded through the gas discharge tube G1; and the TVS catching diode D1 and the capacitor C2 are connected in parallel between the Port 3 and the ground. The wideband low-loss phase splitter adds a lightning protection function, and greatly increases the service life of the phase splitter; moreover, the phase splitter increases the stability, reliability and consistency of an entire system.
Description
Technical field
The utility model relates to the phase splitter in the radio communication, specifically relates to a kind of phase splitter that wireless communication base station is given antenna feed that is used for.
Background technology
Phase splitter is installed between wireless communication base station (BTS) and tower amplifier (TMA) and the power supply (DCpower), as shown in Figure 1, with radiofrequency signal and dc power signal by the tower amplifier (TMA) under radio frequency signal transmission line (Feeder Cable) input aerial (Antenna) and the antenna.
Figure 2 shows that the circuit structure diagram of phase splitter traditional in the system shown in Figure 1, this circuit comprises three port Port1, Port2, Port3, capacitor C 1, capacitor C 2 and inductance L 1.Wherein, port Port1 is connected to the base station, and port Port2 is connected to tower amplifier and antenna by transmission line, and port Port3 is connected to the power supply side mouth.The radiofrequency signal that send the base station is transferred to port Port2 from port Port1 through capacitor C 1, and inductance L 1 is formed low pass filter to the radio frequency Signal Spacing with capacitor C 2, makes it can not be transferred to port Port3, reduces the radiofrequency signal loss.The direct current that the power supply side mouth provides is transferred to port Port2 from port Port3 through resistance R 1 and inductance L 1, and capacitor C 1 can stop direct current to pass through port Port1, has therefore protected the miscellaneous equipment of base station.Radiofrequency signal and dc current signal can be sent to tower amplifier and antenna from the Port2 port through radio frequency signal transmission line simultaneously.
Traditional phase splitter is because selected device all is that lumped-parameter element does not have lightning protected function, is easy to be broken capacitor C 2 and resistance R 1 by lightning strike signals and influences the operate as normal of whole system; Capacitor C 2 is under the influence of radio frequency parasitic parameter in addition, the frequency response of electric capacity reality and theoretical response have very big difference, therefore need change the electric capacity of different appearance values in different frequency of utilization scopes, reduce the reliability of consistency of product and batch process, directly increased production cost of products.
Summary of the invention
The purpose of this utility model is to remedy traditional phase splitter and is subject to thunderbolt and damages, and because defective such as the range limited system of frequency of utilization that lumped parameter electric capacity causes, reliability be low has designed a kind of broadband low loss phase splitter with lightning protected function.
A kind of broadband low loss phase splitter with lightning protected function, comprise three port Port1, Port2, Port3, capacitor C 1, capacitor C 2, resistance R 1 and radio frequency choke induction L1, described phase splitter also comprises microstrip line electric capacity Line, gas discharge tube G1, TVS clamp diode D1; Wherein, capacitor C 1 is connected between port Port1 and the port Port2; Port Port3 is connected serially between capacitor C 1 and the port Port2 through resistance R 1, microstrip line electric capacity Line and radio frequency choke induction L1; The link of resistance R 1 and microstrip line electric capacity Line is connected to ground through gas discharge tube G1; TVS clamp diode D1 and capacitor C 2 are parallel between port Port3 and the ground.
The impedance Z of described radio frequency choke induction L1
LBe at least the featured resistance Z of microstrip line electric capacity Line
C10 times.
A kind of broadband low loss phase splitter product with lightning protected function, this product is made up of phase splitter cavity 401, port1 port connector 402, port2 port connector 403, port3 port connector 404, radio frequency choke induction L1, printed circuit pcb board 405, distributed constant microstrip line electric capacity Line, gas discharge tube G1, resistance R 1, TVS clamp diode 406, earth stud 407 and capacitor C 2; Wherein, cavity 401 is matrixes of phase splitter, 3 port connectors, printed circuit pcb board 405, earth stud 407 all assembles thereon, and resistance R 1, radio frequency choke induction L1, gas discharge tube G1, TVS clamp diode 406 all be assemblied on the printed circuit pcb board 405, and distributed constant microstrip line electric capacity Line is made on the printed circuit pcb board 405, and port1 port connector 402 is connected with radio-frequency transmission line; Port2 port connector 403 is connected with the base station output port; Port3 port connector 404 is connected with the base station power delivery outlet.
The material of described cavity 401 is an alloy aluminum, the surface conductance oxidation processes.
Described Port1 port connector 402 is the positive head connector of 7/16 (DIN).
Described Port2 port connector 403 is the cloudy head connector of 7/16 (DIN).
Described Port3 port connector 404 is the cloudy head connector of SMA.
Phase splitter described in the utility model has increased anti-lightning strike defencive function, has increased the useful life of phase splitter greatly, has improved the stability of whole system; In addition, the withstand voltage of microstrip line distributed constant electric capacity is more than a times of lumped parameter electric capacity, and because the filter circuit that microstrip line distributed circuit and radio frequency choke induction are formed has wideer bandwidth, therefore make the frequency range of input signal can reach 800MHz-2170MHz, comprised the at present main employed frequency range of wireless communication base station, therefore, adopt microstrip line distributed constant electric capacity to replace lumped parameter electric capacity and improved reliability of products, consistency, versatility.
In addition, the device design of producing according to circuit structure described in the utility model and device is light and handy, installs and fixes simple and easyly, and debug process is simply easy, need not debug substantially behind the design typification, and the surface increases can also expand behind the spraying coating process and using the open air.
Description of drawings
Fig. 1 is the structural representation of the base station transmit signals front end antenna reponse system at phase splitter described in the utility model place;
Fig. 2 is the circuit structure diagram of phase splitter in the prior art;
Fig. 3 is the circuit structure diagram of phase splitter described in the utility model specific embodiment;
Fig. 4 is the phase splitter three-dimensional structure diagram that utilizes phase circuit structure chart described in the utility model to be produced.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is explained in detail.
In the utility model specific embodiment, microstrip line electric capacity Line is produced on the PCB printed circuit board (PCB), the computing application of its capacitance the distributed constant principle of microstrip line, as shown in Figure 3, the radio frequency choke induction L1 of described microstrip line electric capacity Line one termination one high impedance, therefore the end input impedance of microstrip line electric capacity Line is the load of a high impedance, is set at Z
L, and the characteristic impedance of setting described microstrip line electric capacity Line is Z
C, then by transmission line theory, from the other end input admittance Y of this microstrip line electric capacity Line
InAvailable formula (1) expression.
If Z
LBe at least Z
CMore than ten times the time, can think Z
L＞＞Z
C, then formula (1) can be approximated as follows processing:
Further be reduced to formula (2):
By taylor series expansion:
When
The time, can be similar to and obtain tanx=x
Therefore formula (2) can be approximately:
Because phase velocity
Wherein:
ω is an angular frequency, velocity of wave
And c is the light velocity in the vacuum, ε
EffEffective dielectric constant for microstrip line electric capacity Line.
Order
Then described admittance Y
InCan be expressed as formula (3).
By above-mentioned derivation as can be known, microstrip line electric capacity as shown in Figure 3 is inductance and electric capacity in parallel with the equivalence that is connected of radio frequency choke induction L1, and because microstrip line electric capacity Line is a distributed constant electric capacity, its resistance to pressure is more than a times of lumped parameter electric capacity in the prior art, and when forming low-pass filtering with radio frequency choke induction L1, has wideer bandwidth, the frequency of utilization scope increases, can reach 800MHz to 2170MHz, substantially comprised the employed frequency range of present main wireless communication base station, therefore, even when the frequency range of the described phase splitter of the utility model specific embodiment place system changes, still adapt to, and do not need to change the electric capacity of different appearance values, have better generality, thereby reduce cost, use also more convenient.
Simultaneously, in the utility model specific embodiment, increased gas discharge tube G1 and TVS clamp diode D1 basic composition element as lightning prevention circuit.
Wherein the operation principle of gas discharge tube is for when discharge tube lead-in wire both end voltage surpasses the compressive resistance of discharge tube design; discharge tube two ends can be connected and release voltage arrives ground; thereby external surge voltage with harmfulness is suppressed to get off; simultaneously the surging energy is derived, to finish the function of protection circuit or assembly.
And TVS clamp diode D1 plays the effect that suppresses mutation voltage equally; when TVS clamp diode D1 is in normal operating conditions; this diode D1 presents high impedance status; as shown in Figure 3, then TVS clamp diode D1 place branch road is near off-state, and when the voltage that occurs uprushing; this TVS clamp diode D1 presents Low ESR; thereby make the instantaneous large-current that flows to port Port3 produce shunting, D1 branches to ground through this TVS clamp diode, thereby plays a protective role.
Therefore, described phase circuit is when operate as normal, and is identical with the operation principle of phase splitter in the prior art when promptly thunder-strike phenomenon not taking place, and radiofrequency signal transfers to port port2 from port port1 input through capacitor C 1; Simultaneously, dc power signal inputs to port port2 through port port3, at port Port2 radiofrequency signal and direct current is transferred to tower amplifier together.When running into thunderbolt, to port port2, because the partition effect of capacitor C 1 is arranged, the big current signal that is struck by lightning can not flow to port port1 to the big current signal of the thunderbolt of induction, thereby can protect base station equipment when port port1 from antenna transmission; And in the branch road of port3 port place, microstrip line electric capacity Line is in parallel with radio frequency choke induction L1, therefore can not play the effect of obstruct, but in the described phase circuit of the utility model specific embodiment, because the existence of gas discharge tube G1, according to the characteristic of gas discharge tube, when the big current signal that is struck by lightning passes through radio frequency choke induction L1 to gas discharge tube G1, the big current signal of thunderbolt can be discharged into ground; If gas discharge tube G1 has not discharged when being struck by lightning big current signal fully; then remaining big electric current arrives TVS clamp diode D1 place down through resistance R 1 time-delay; the impedance of TVS clamp diode D1 reduces; form the path of ground connection; thereby control herein voltage range by TVS clamp diode D1; guarantee that the power supply power supply unit can not be damaged, and plays the effect of second class protection.
Figure 4 shows that a kind of phase splitter product of realizing according to the described circuit structure of the utility model specific embodiment, this product is by phase splitter cavity 401, port1 port connector 402, port2 port connector 403, port3 port connector 404, radio frequency choke induction L1, printed circuit pcb board 405, distributed constant microstrip line electric capacity Line, gas discharge tube G1, resistance R 1, TVS clamp diode 406, earth stud 407 and capacitor C 2 are formed, the feature and the correlation of each part are as follows: cavity 401 is matrixes of phase splitter, 3 port connectors, printed circuit pcb board 405 and earth stud all assemble thereon, its material is an alloy aluminum, the surface conductance oxidation processes.And resistance R 1, radio frequency choke induction L1, gas discharge tube G1, TVS clamp diode 406 all be assemblied on the printed circuit board (PCB), and distributed constant microstrip line electric capacity is made on the printed circuit board (PCB).Port1 port connector 402 is the positive head connector of 7/16 (DIN), is connected with radio-frequency transmission line.Port2 port connector 403 is the cloudy head connector of 7/16 (DIN), is connected with the base station output port.Port3 port connector 404 is the cloudy head connector of SMA, is connected with the base station power delivery outlet.Radio frequency choke induction L1 forms with the high-temperature resistant enamelled wire coiling.Printed circuit pcb board 405 is formed lightning prevention circuit and power supply circuits with each device.
It should be noted that; phase splitter product shown in Figure 4 only is a kind of product form of phase circuit described in the utility model; other satisfies the product of circuit structure described in the utility model; not influence the factor of circuit characteristic inequality even material, components and parts title, outward appearance, components and parts are put sequential scheduling, still belongs to the scope of the utility model protection.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (7)
1. broadband low loss phase splitter with lightning protected function, comprise three port Port1, Port2, Port3, capacitor C 1, capacitor C 2, resistance R 1 and radio frequency choke induction L1, it is characterized in that described phase splitter also comprises microstrip line electric capacity Line, gas discharge tube G1, TVS clamp diode D1; Wherein, capacitor C 1 is connected between port Port1 and the port Port2; Port Port3 is connected serially between capacitor C 1 and the port Port2 through resistance R 1, microstrip line electric capacity Line and radio frequency choke induction L1; The link of resistance R 1 and microstrip line electric capacity Line is connected to ground through gas discharge tube G1; TVS clamp diode D1 and capacitor C 2 are parallel between port Port3 and the ground.
2. a kind of broadband low loss phase splitter with lightning protected function according to claim 1 is characterized in that the impedance Z of described radio frequency choke induction L1
LBe at least the featured resistance Z of microstrip line electric capacity Line
C10 times.
3. broadband low loss phase splitter product with lightning protected function, it is characterized in that this product is made up of phase splitter cavity (401), port1 port connector (402), port2 port connector (403), port3 port connector (404), radio frequency choke induction L1, printed circuit pcb board (405), distributed constant microstrip line electric capacity Line, gas discharge tube G1, resistance R 1, TVS clamp diode (406), earth stud (407) and capacitor C 2; Wherein, cavity (401) is the matrix of phase splitter, 3 port connectors, printed circuit pcb board (405), earth stud (407) all assembles thereon, and resistance R 1, radio frequency choke induction L1, gas discharge tube G1, TVS clamp diode (406) all be assemblied on the printed circuit pcb board (405), and distributed constant microstrip line electric capacity Line is made on the printed circuit pcb board (405), and port1 port connector (402) is connected with radio-frequency transmission line; Port2 port connector (403) is connected with the base station output port; Port3 port connector (404) is connected with the base station power delivery outlet.
4. a kind of broadband low loss phase splitter product with lightning protected function according to claim 3 is characterized in that the material of described cavity (401) is an alloy aluminum, the surface conductance oxidation processes.
5. a kind of broadband low loss phase splitter product with lightning protected function according to claim 3 is characterized in that described Port1 port connector (402) is the positive head connector of 7/16 (DIN).
6. a kind of broadband low loss phase splitter product with lightning protected function according to claim 3 is characterized in that described Port2 port connector (403) is the cloudy head connector of 7/16 (DIN).
7. a kind of broadband low loss phase splitter product with lightning protected function according to claim 3 is characterized in that, described Port3 port connector (404) is the cloudy head connector of SMA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200930000U CN201174693Y (en) | 2008-04-03 | 2008-04-03 | Wideband low-loss phase splitter having lightning protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200930000U CN201174693Y (en) | 2008-04-03 | 2008-04-03 | Wideband low-loss phase splitter having lightning protection function |
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| Publication Number | Publication Date |
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| CN201174693Y true CN201174693Y (en) | 2008-12-31 |
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| CNU2008200930000U Expired - Lifetime CN201174693Y (en) | 2008-04-03 | 2008-04-03 | Wideband low-loss phase splitter having lightning protection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473958A (en) * | 2017-09-08 | 2019-03-15 | 深圳创维数字技术有限公司 | A kind of lightning protection circuit and electrical equipment |
-
2008
- 2008-04-03 CN CNU2008200930000U patent/CN201174693Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473958A (en) * | 2017-09-08 | 2019-03-15 | 深圳创维数字技术有限公司 | A kind of lightning protection circuit and electrical equipment |
| CN109473958B (en) * | 2017-09-08 | 2023-11-21 | 深圳创维数字技术有限公司 | Lightning protection circuit and electrical equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FREY COMMUNICATION TECHNOLOGY (SHENZHEN) CO., LTD. Free format text: FORMER OWNER: SHENZHEN FUDEXIN SCIENCE AND TECHNOLOGY CO., LTD. Effective date: 20100531 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518067 10E, JIALITAI BUILDING, NO.6, YANSHAN ROAD, NANSHAN DISTRICT, SHENZHEN CITY, GUANGDONG PROVINCE TO: FACTORY BUILDING NO.1, YIZHONGLI SCIENCE PARK, LANGSHAN 1ST ROAD, NORTH ZONE OF HIGH-TECH. DEVELOPMENT AREA, NANSHAN DISTRICT, SHENZHEN CITY, GUANGDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20100531 Address after: The way Yizhongli science and Technology Park in Guangdong city of Shenzhen province Nanshan District high tech Park North Long Hill No. 1 Factory Patentee after: Frey communication technology (Shenzhen) Co., Ltd. Address before: Shenzhen City, Nanshan District 518067, Guangdong Province along the road No. 6 jialitai building 10E Patentee before: Shenzhen Fudexin Science and Technology Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: COMMSCOPE ITALIA S.R.L. Free format text: FORMER OWNER: FOLEI COMMUNICATION TECHNOLOGY (SHENZHEN) CO., LTD. Effective date: 20120711 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120711 Address after: Milan Italy Patentee after: Italy Kaobo combs Co. Ltd. Address before: The way Yizhongli science and Technology Park in Guangdong city of Shenzhen province Nanshan District high tech Park North Long Hill No. 1 Factory Patentee before: Frey communication technology (Shenzhen) Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081231 |