CN102158218A - Coaxial integrated radio frequency signal isolator - Google Patents
Coaxial integrated radio frequency signal isolator Download PDFInfo
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- CN102158218A CN102158218A CN 201010546794 CN201010546794A CN102158218A CN 102158218 A CN102158218 A CN 102158218A CN 201010546794 CN201010546794 CN 201010546794 CN 201010546794 A CN201010546794 A CN 201010546794A CN 102158218 A CN102158218 A CN 102158218A
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Abstract
The invention discloses a coaxial integrated radio frequency signal isolator, which comprises an N-type connector anode male end and an N-type connector female end. The N-type connector male end and the N-type connector female end are fixedly assembled together by an insulating shell. Inner channels of the N-type connector male end and the N-type connector female end are provided with a male end internal conductor and a female end internal conductor. The male end internal conductor and the female end internal conductor are connected by a central silvered capacitor. A plurality of outer-ring silvered capacitors are distributed in the insulating shell, and are connected together by a current collecting piece to form an outer-ring silvered capacitor bank. The two ends of the outer-ring silvered capacitor bank are connected with an outer metal shell consisting of the N-type connector male end and the N-type connector female end. The coaxial integrated radio frequency signal isolator is manufactured to be through like an N-type connector, and can be conveniently connected in series into a radio frequency transmission cable to isolate DC and low frequency signals and enable high frequency signals of 300 to 4,000 MHz to pass through.
Description
Technical field
The present invention relates to a kind of isolator, especially a kind of subway that is suitable for, the tunnel communication system, be used in the telecommunication cable in each system or reveal the coaxial integrated radiofrequency signal isolator that cable is done direct current and low frequency signal partition, can effectively avoid the communication system failure rate being increased owing to humid environment makes decreasing insulating.
Background technology
Coaxial isolator can be used for subway, and the cable in the tunnel communication system plays direct current and low frequency signal cutting function, possess volume little, in light weight, isolate reliable and with advantages such as the coaxial one of cable is connected.Coaxial integrated radiofrequency signal isolator on the market, home and abroad is all just isolated by center conductor at present, and shell body is not then established isolating device, defective can occur in some cases, and for tunnel or other abominable environments for use, failure rate is very high.In addition, existing coaxial integrated radiofrequency signal isolator, the frequency of utilization scope is generally 800MHz to 2500MHz.Along with the continuous development of the communication technology and the continuous expansion of communication band, existing isolator is very not suitable gradually.Therefore, must need high performance coaxial integrated radiofrequency signal isolator, could guarantee each system's reliably working, the present invention is directed to this and design.
Summary of the invention
The object of the present invention is to provide a kind of subway that is applied to, the high performance coaxial integrated radiofrequency signal isolator of communication such as tunnel makes each communication system energy reliable, the operation of high-quality.
The technical scheme that the present invention is adopted for its technical problem of solution is:
Coaxial integrated radiofrequency signal isolator, comprise the connectivity port of mainly forming by N Connector positive and negative head, N Connector positive and negative head fixedly is assemblied in together by insulation crust, the internal channel of N Connector positive and negative head is respectively arranged with positive and negative head inner wire, and described positive and negative head inner wire is connected by silver-colored electric capacity by the center; Be distributed with a plurality of outer shrouds by silver-colored electric capacity in insulation crust, a plurality of outer shrouds are linked together by flow collection sheet by silver-colored electric capacity and form outer shroud by silver-colored capacitance group, and outer shroud is connected N Connector positive and negative head respectively by silver-colored capacitance group two ends, forms shell body frequency band passage.
Above-mentioned N Connector positive and negative head is connected with insulation crust by the positive and negative head flange dish of metal respectively.
Above-mentioned outer shroud is installed on the cloudy head flange dish by silver-colored capacitance group one end, so that outer shroud is connected the cloudy head capsule body of N Connector by silver-colored capacitance group by cloudy head flange dish.
Above-mentioned flow collection sheet is installed on the positive head flange dish, so that outer shroud is connected by the housing of flow collection sheet with N Connector sun head by the other end of silver-colored capacitance group.
Further, the center is formed electrode by silver-colored electric capacity two ends difference lead-out wire, and described positive and negative head inner wire end is respectively equipped with the ccontaining port that cooperates with the cylindrical electrode of same end.
Above-mentioned positive and negative head inner wire periphery is equipped with positive and negative head insulator respectively, and is fixed in the internal channel of N Connector positive and negative head by positive and negative head insulator respectively.
Above-mentioned outer shroud is equidistantly distributed on a concentric circles by silver-colored electric capacity.
Above-mentioned outer shroud is provided with seven outer shrouds that are evenly distributed by silver-colored electric capacity by silver-colored capacitance group.
Above-mentioned outer shroud is that central shaft distribute with the center by silver-colored electric capacity by silver-colored electric capacity.
Wherein the impedance of the input and output prevention at radio-frequency port of N Connector positive and negative head is 50 ohm.
The invention has the beneficial effects as follows: the present invention makes that to be similar to N Connector (sun of a moon) straight-through, can be serially connected in very easily in the radio frequency transmission cable, direct current and low frequency signal is isolated, and allow high-frequency signal (300-4000MHz) pass through smoothly; Possessed high pressure resistant property by silver-colored electric capacity, and design the capacitance of each electric capacity and the inside diameter of transmission cavity, have best return loss, guarantee the transmission of useful signal high-fidelity to guarantee input/output port by the transfer impedance in 50 Europe.Among the present invention, the isolated DC of the inner wire at center is by a silver-colored electric capacity of quilt and a rational cavity design parameter that capacitance is suitable; The silver-colored electric capacity of a plurality of quilts then equivalence becomes a suitable partiting dc capacitor that is serially connected between two N Connector shell bodies, and by the design of cavity parameters and the correction of distributed constant, to reach the purpose that product has center conductor and the equal stopping direct current of shell body and has optimum Match.
Description of drawings
Further specify below in conjunction with the drawings and specific embodiments:
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is a fractionation structure cutaway view of the present invention;
Fig. 3 is a structural representation of the present invention;
Fig. 4 reveals the schematic diagram that cable is connected with the tunnel in the embodiment of the invention;
Fig. 5 is a S Parameter Map of the present invention.
Embodiment
With reference to Fig. 1, it is the electrical schematic diagram of the embodiment of the invention, as can be seen from the figure, between the input and output of isolator, the capacitor C 0 that seals in is as long as its capacitance is enough big, enough little with the impedance that in service band, presents, then high-frequency signal be can be considered short circuit, direct current or low frequency signal are then presented very high impedance, be equivalent to open circuit.Then sealing in capacitor C 1, C2, C3, C4, C5, C6, C7 between the metal shell body of the composition that positive 1 of N Connector and N Connector are cloudy 1, as the high-frequency signal path between the metal shell body, then is open circuit to direct current or low frequency signal.
As shown in Figures 2 and 3, coaxial integrated radiofrequency signal isolator provided by the present invention, comprise cloudy 2 of positive 1 of N Connector and N Connector, N Connector sun 1 fixedly is assemblied in by insulation crust 3 with cloudy 2 end separately of N Connector, the other end is then as the port that connects cable, in order to cooperate the sun inner wire 4 in the internal channel separately, a cloudy inner wire 5 to be connected with lead, its sample attitude in use, as shown in Figure 4, radiofrequency signal isolator two-port is connected with cable 9 respectively, forms coaxial integrated form; The internal channel that positive 1 of N Connector and N Connector are cloudy 2 can fix a sun inner wire 4, the moon inner wire 5 by a sun insulator 42, a cloudy insulator 52 respectively, guarantees insulation and assembling effect.
As previously mentioned, the present invention adopts electric capacity that direct current or low frequency signal are isolated, and need reach enough operating characteristics, by the calculating of capacitance and relevant distributed constant and shell and inner cavity size design, to realize that high-frequency signal (300-4000MHz) passes through smoothly, a middle-jiao yang, function of the spleen and stomach of the present invention inner wire 4, a cloudy inner wire 5 adopt the components and parts C0 of the suitable silver-colored formula of quilt of capacitance, and promptly the center is connected by silver-colored electric capacity 6.Wherein, special welding method can be adopted by silver-colored electric capacity 6 two ends in the center, draw two cylindrical electrodes 61, a sun inner wire 4, a cloudy inner wire 5 ends are provided with ccontaining port 41 and ccontaining port 51 respectively simultaneously, so that the center can closely be linked together with a sun inner wire 4, a cloudy inner wire 5 very easily by the cylindrical electrode 61 at silver-colored electric capacity 6 two ends.Direct current, the low frequency signal isolation of center conductor have so been realized.The isolated DC that positive 1 of N Connector of metal shell body and N Connector are cloudy 2 is then realized by silver-colored capacitance group by outer shroud, this outer shroud is connected positive 1 of N Connector by an end of silver-colored capacitance group, the other end connects cloudy 2 of N Connector, realize the two poles of the earth respectively with being connected of two metal shell bodies; Outer shroud mainly is made up of by silver-colored electric capacity 7 many outer shrouds by silver-colored capacitance group, and forms one by flow collection sheet 71, is a suitable partiting dc capacitor that is serially connected between N Connector sun 1 and N Connector the moon 2 metal shell body with this equivalence.In order to guarantee the accessible transmission of high-frequency signal, so require the return loss of input/output port little, to reduce the reflection of signal, be preferably seven outer shrouds in the present embodiment by silver-colored electric capacity 7, be equivalent to the C1～C7 among Fig. 1, be equally distributed on the concentric circumferences, this concentric circumferences can the center by silver-colored electric capacity 6 as the axis, make outer shroud identical as far as possible, in using passband, be equal to a good conductor by the distributed constant of silver-colored electric capacity 7.Among the present invention, all be 50 ohmages design, radiofrequency signal can be passed through by coaxial integrated radiofrequency signal isolator the time fully smoothly, reduce reflection, reach optimum Match by the N Connector standard at the port of input and output.
As preferred construction, positive 1 of N Connector passes through positive head flange dish 11 and is connected with insulation crust 3, cloudy 2 of N Connector passes through cloudy head flange dish 21 and is connected with insulation crust 3, its syndeton is comparatively rationally simple, and positive head flange dish 11 is convenient to fix outer shroud by silver-colored capacitance group with cloudy head flange dish 21.Its preferred fixed structure can adopt: outer shroud is installed on the cloudy head flange dish 21 by silver-colored capacitance group, so that outer shroud is connected cloudy 2 of N Connector by silver-colored capacitance group by cloudy head flange dish 21; Flow collection sheet 71 is installed on the positive head flange dish 11, so that outer shroud is connected N Connector sun 1 by silver-colored capacitance group by flow collection sheet 71 and positive head flange dish 11; So can realize the two poles of the earth respectively with being connected of metal shell.
Be illustrated in figure 5 as the S Parameter Map of isolator of the present invention, performance of the present invention that it has passed a test the achievement data directviewing description, wherein, S21 represents transmission characteristic; S11 represents input port coupling quality (standing-wave ratio); S22 is an output port coupling quality (standing-wave ratio).
Can find out from product model machine measured data:
The forward characteristic of product: the S21 representative value is less than 0.2dB, and indivedual points also are no more than 0.3d B;
Input vswr: representative value is: 1.2: 1; Indivedual points are not more than: 1.35: 1;
The output standing-wave ratio: representative value is: 1.2: 1; Indivedual points are not more than: 1.35: 1
The main electrical performance indexes of the present invention is as follows:
Frequency range: 300MHz---4000MHz
DC break down voltage: greater than 1000V
Insert loss: less than 0.25d B
Input vswr: less than 1.35
Output standing-wave ratio: less than 1.35
The equal stopping direct current of center conductor and shell body
Mean time between failures: 100000 hours.
Claims (10)
1. coaxial integrated radiofrequency signal isolator, it is characterized in that: comprise the shell of mainly forming by N Connector positive and negative head (1,2), N Connector positive and negative head (1,2) fixedly is assemblied in together by insulation crust (3), the internal channel of N Connector positive and negative head (1,2) is respectively arranged with positive and negative head inner wire (4,5), and described positive and negative head inner wire (4,5) is connected by silver-colored electric capacity (6) by the center; In insulation crust (3), be distributed with a plurality of outer shrouds by silver-colored electric capacity (7), a plurality of outer shrouds are linked together by flow collection sheet (71) by silver-colored electric capacity (7) and form outer shroud by silver-colored capacitance group, outer shroud is connected N Connector positive and negative head (1,2) respectively by silver-colored capacitance group two ends, forms shell frequency band passage.
2. coaxial integrated radiofrequency signal isolator according to claim 1 is characterized in that: described N Connector positive and negative head (1,2) is connected with insulation crust (3) by positive and negative head flange dish (11,21) respectively.
3. coaxial integrated radiofrequency signal isolator according to claim 2, it is characterized in that: described outer shroud is installed on the cloudy head flange dish (21) by silver-colored capacitance group, so that outer shroud is connected the cloudy head of N Connector (2) by silver-colored capacitance group by cloudy head flange dish (21).
4. according to claim 2 or 3 described coaxial integrated radiofrequency signal isolators, it is characterized in that: described flow collection sheet (71) is installed on the positive head flange dish (11), so that outer shroud is connected N Connector sun (1) by silver-colored capacitance group by flow collection sheet (71) and positive head flange dish (11).
5. coaxial integrated radiofrequency signal isolator according to claim 1, it is characterized in that: described center is drawn shape electrode (61) respectively by silver-colored electric capacity (6) two ends, and described positive and negative head inner wire (4,5) end is respectively equipped with the ccontaining port (41,51) that cooperates with the cylindrical electrode (61) of same end.
6. according to claim 1 or 2 or 3 or 5 described coaxial integrated radiofrequency signal isolators, it is characterized in that: described positive and negative head inner wire (4,5) periphery is equipped with positive and negative head insulator (42,52) respectively, and is fixed in the internal channel of N Connector positive and negative head (1,2) by positive and negative head insulator (42,52) respectively.
7. coaxial integrated radiofrequency signal isolator according to claim 1 is characterized in that: described outer shroud is distributed on the concentric circles by silver-colored electric capacity (7).
8. coaxial integrated radiofrequency signal isolator according to claim 7 is characterized in that: described outer shroud is had seven outer shrouds by silver-colored electric capacity (7) by silver-colored capacitance group, and seven outer shrouds are that central shaft be equally spaced with the center by silver-colored electric capacity (6) by silver-colored electric capacity (7).
9. coaxial integrated radiofrequency signal isolator according to claim 1 is characterized in that: described N Connector positive and negative head (1,2) is fixedlyed connected by trip bolt (8) respectively with insulation crust (3).
10. coaxial integrated radiofrequency signal isolator according to claim 1 is characterized in that: the impedance of the input and output prevention at radio-frequency port of described N Connector positive and negative head (1,2) is 50 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010546794 CN102158218A (en) | 2010-11-16 | 2010-11-16 | Coaxial integrated radio frequency signal isolator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010546794 CN102158218A (en) | 2010-11-16 | 2010-11-16 | Coaxial integrated radio frequency signal isolator |
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| CN102158218A true CN102158218A (en) | 2011-08-17 |
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| CN 201010546794 Pending CN102158218A (en) | 2010-11-16 | 2010-11-16 | Coaxial integrated radio frequency signal isolator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293391A (en) * | 2020-03-25 | 2020-06-16 | 南京亿高微波系统工程有限公司 | Direct-current high-voltage breaker of microwave therapeutic apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996035243A1 (en) * | 1995-05-03 | 1996-11-07 | H.P.M. Industries Pty. Ltd. | Fault voltage isolator |
| US6496353B1 (en) * | 2002-01-30 | 2002-12-17 | Anritsu Company | Capacitive structure for use with coaxial transmission cables |
| CN1707702A (en) * | 2004-06-01 | 2005-12-14 | 安捷伦科技有限公司 | Coaxial DC block |
| CN201877554U (en) * | 2010-11-16 | 2011-06-22 | 广东通宇通讯股份有限公司 | Coaxial integrated radio frequency signal isolator |
-
2010
- 2010-11-16 CN CN 201010546794 patent/CN102158218A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996035243A1 (en) * | 1995-05-03 | 1996-11-07 | H.P.M. Industries Pty. Ltd. | Fault voltage isolator |
| US6496353B1 (en) * | 2002-01-30 | 2002-12-17 | Anritsu Company | Capacitive structure for use with coaxial transmission cables |
| CN1707702A (en) * | 2004-06-01 | 2005-12-14 | 安捷伦科技有限公司 | Coaxial DC block |
| CN201877554U (en) * | 2010-11-16 | 2011-06-22 | 广东通宇通讯股份有限公司 | Coaxial integrated radio frequency signal isolator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293391A (en) * | 2020-03-25 | 2020-06-16 | 南京亿高微波系统工程有限公司 | Direct-current high-voltage breaker of microwave therapeutic apparatus |
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Application publication date: 20110817 |