CN102110865B - Leakage coaxial cable - Google Patents
Leakage coaxial cable Download PDFInfo
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- CN102110865B CN102110865B CN 201110029935 CN201110029935A CN102110865B CN 102110865 B CN102110865 B CN 102110865B CN 201110029935 CN201110029935 CN 201110029935 CN 201110029935 A CN201110029935 A CN 201110029935A CN 102110865 B CN102110865 B CN 102110865B
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- cable
- control
- coaxial cable
- diode pair
- leakage coaxial
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Abstract
The invention discloses a leakage coaxial cable. The leakage coaxial cable comprises a cable outer conductor, a cable inner conductor, a cable insulating layer, a cable slit, a control cable, a control diode pair and a control cable connection wire, wherein the cable inner conductor is positioned on the innermost part of the leakage coaxial cable; the cable insulating layer surrounds the cable inner conductor; the periphery of the cable insulating layer is provided with the cable outer conductor; the cable slit is formed on the cable outer conductor; and the control diode pair is arranged in the cable slit, and is connected with the control cable through the control cable connection wire. By introducing the control diode pair in the leakage coaxial cable, the working frequency of the leakage coaxial cable is controlled by utilizing the combination of open and closed states of the control diode pair, so that the defect of unicity of the conventional leakage coaxial cable is overcome, and the aim of controlling the leakage coaxial cable is fulfilled.
Description
Technical field
The invention belongs to the technical field of the communications cable, relate in particular to the design of leaky coaxial cable.
Background technology
Leaky coaxial cable (LCX, Leaky Coaxial Cable) has the signal transmitting effect, has again antenna function, control by external conductor openings, controlled electromagnetic wave energy can be radiate uniformly and receives into along circuit, realization reaches the unimpeded purpose of mobile communication to the covering of electromagnetic field blind area.The structure of existing leaky coaxial cable as shown in Figure 1, leaky coaxial cable is by being positioned at innermost inner wire 11, being positioned at the insulator 12 of inner wire 11 peripheries, the outer conductor 13 of the slotted eye with periodic arrangement 15 that is positioned at insulator 12 peripheries and the sheath 14 that is positioned at outer conductor 13 peripheries and consisting of.
Leaky coaxial cable is mainly used in subway, the radio communication under the environment such as tunnel and heavy construction (such as departure hall, station hall).It has radiation and receives the characteristic of transmission microwave signal, the some strength that can keep wireless communication signals in these occasions, thereby guarantee radio communication (such as mobile communication, fire-fighting and other security-related radio communication) unimpeded under these special occasions.Wherein, LCX has become the standard communications facility.Subway, light rail and fast iron such as net distribution cover rapidly the vast zone between city and the big and medium-sized cities, like this so that the demand of LCX is increasing, performance requirement presents diversity, the development trend of complexity, thereby monistic LCX can not practical requirement.
Summary of the invention
The objective of the invention is to have proposed a kind of leaky coaxial cable in order to solve the problem that existing monistic LCX can not practical requirement.
To achieve these goals, technical scheme of the present invention is: a kind of leaky coaxial cable, comprise: cable outer conductor, cable inner conductor, cable insulation, cable crack, cable inner conductor is positioned at the inside of leaky coaxial cable, cable insulation surrounds cable inner conductor, the periphery of cable insulation is cable outer conductor, it is characterized in that
Also comprise control cables, control diode pair, control cables line, cable cracks out on cable outer conductor, and at the cable interior placement control diode pair that cracks, the control diode pair links to each other with control cables by the control cables line.
The control diode pair here, formed by two PIN diode, wherein the N of two PIN diode extremely links to each other and links to each other with the control cables line as control electric current pad again, and the P utmost point of two PIN diode cracks with cable as the edge bead that cracks respectively and links to each other.
Beneficial effect of the present invention: the present invention is by introducing the control diode pair in leaky coaxial cable, utilize the disconnection of control diode pair and the combination of closed two states, control the operating frequency of leaky coaxial cable, overcome the monistic defective of existing leaky coaxial cable, reached the purpose of control leaky coaxial cable.
Description of drawings
Fig. 1 is the structural representation of existing leaky coaxial cable.
Fig. 2 is the structural representation of leaky coaxial cable of the present invention.
Fig. 3 is the right structural representation of control PIN diode of the present invention.
Fig. 4 is the schematic diagram of the application of leaky coaxial cable of the present invention in operating frequency control.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is further detailed.
The structural representation of leaky coaxial cable of the present invention as shown in Figure 2, comprise: cable outer conductor 21, cable inner conductor 22, cable insulation 23, cable cracks 27, cable inner conductor 22 is positioned at the inside of leaky coaxial cable, cable insulation 23 surrounds cable inner conductor 22, the periphery of cable insulation 23 is cable outer conductors 21, also comprise control cables 24, control diode pair 26, control cables line 25, cable cracks and 27 opens on cable outer conductor 21, and place control diode pair 26 within it, control diode pair 26 links to each other with control cables 24 by control cables line 25.
As shown in Figure 3, the control diode pair 26 here, be control PIN diode pair, formed by two PIN diode, wherein the N of two PIN diode extremely links to each other and links to each other with control cables line 25 as control electric current pad 261 again, and crack edge bead 262 and cable of the P utmost point conduct of two PIN diode cracks and 27 link to each other.
For convenience of explanation, in Fig. 1, cable cracks and has placed four pairs of control PIN diode pair in 27, and the present invention is not limited to four pairs, can select according to actual needs to control the right logarithm of PIN diode.
Leaky coaxial cable for a better understanding of the present invention, the below provides a concrete application example in operating frequency control.
In the cable of LCX cracks, select suitable position access control PIN diode pair, in the conducting of PIN diode with disconnect under the two states, can regulate the effective length that cable cracks, thereby reach the purpose of the operating frequency of control LCX.
Select suitable slot opening form that LCX is operated under narrow-band or the broadband.As shown in Figure 4, a and b are that two measure-alike cables crack, place control PIN diode pair among a, represent existing leaky coaxial cable, place four control PIN diode pair among the b, represent leaky coaxial cable of the present invention, when 4 among the b that cracks control PIN diode when being in off-state, the crack resonance frequency of a and b of cable is identical, thereby LCX is operated under the single frequency; In the cable among Fig. 4 cracks b 4 control PIN diode are when being in different on off states, the crack equivalent length of b of cable just is changed, thereby its resonance frequency also is changed, thereby cause different operating frequencies, the width of a is constant and cable cracks, total effect is that the operating frequency of LCX has obtained widening, thereby has controlled the operating frequency of LCX.
The present invention is by introducing the control diode pair in leaky coaxial cable, utilize the disconnection of control diode pair and the combination of closed two states, control the operating frequency of leaky coaxial cable, overcome the monistic defective of existing leaky coaxial cable, reached the purpose of control leaky coaxial cable.
What control the diode pair employing here is PIN diode, PIN diode is a kind of microwave diode, when its operating frequency surpasses 100MHz, because the transit-time effect in the storage effect of minority carrier and " intrinsic " layer, its diode loses rectified action and becomes impedance component, and its resistance value changes with bias voltage.It presents very low impedance to microwave under the forward current biasing, and under reverse bias or zero offset microwave is presented very high impedance.When the direct current forward bias, because carrier injection " intrinsic " district, and make " intrinsic " district present low impedance state, can use PIN diode as variable impedance element, by the right disconnection of the control PIN diode of some and the combination of closed two states, control the operating frequency of leaky coaxial cable, and then reach the purpose of control leaky coaxial cable.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help reader understanding's principle of the present invention, should to be understood to that the protection range of inventing is not limited to such special statement and embodiment.Everyly make various possible being equal to according to foregoing description and replace or change, all be considered to belong to the protection range of claim of the present invention.
Claims (1)
1. leaky coaxial cable, comprise: cable outer conductor (21), cable inner conductor (22), cable insulation (23), cable crack (27), cable inner conductor (22) is positioned at the inside of leaky coaxial cable, cable insulation (23) surrounds cable inner conductor (22), the periphery of cable insulation (23) is cable outer conductor (21), it is characterized in that
Also comprise control cables (24), control diode pair (26), control cables line (25), cable crack (27) open on cable outer conductor (21), and place control diode pair (26) in crack at cable (27), control diode pair (26) links to each other with control cables (24) by control cables line (25);
Described control diode pair (26), formed by two PIN diode, wherein the N of two PIN diode extremely links to each other and links to each other with control cables line (25) as control electric current pad (261) again, the P utmost point of two PIN diode respectively conduct crack edge bead (262) crack with cable (27) link to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110029935 CN102110865B (en) | 2011-01-27 | 2011-01-27 | Leakage coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110029935 CN102110865B (en) | 2011-01-27 | 2011-01-27 | Leakage coaxial cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102110865A CN102110865A (en) | 2011-06-29 |
| CN102110865B true CN102110865B (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110029935 Expired - Fee Related CN102110865B (en) | 2011-01-27 | 2011-01-27 | Leakage coaxial cable |
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| Country | Link |
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| CN (1) | CN102110865B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495567A (en) * | 2011-12-02 | 2012-06-13 | 中天日立射频电缆有限公司 | Radiation field-intensity automatic control system based on leakage cable |
| JP7301609B2 (en) * | 2019-06-05 | 2023-07-03 | 東芝テック株式会社 | communication cable |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2718692Y (en) * | 2003-08-21 | 2005-08-17 | 肖公亮 | Circum ferential invasion guard system for radio electromagnetic field leakage theory |
-
2011
- 2011-01-27 CN CN 201110029935 patent/CN102110865B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2718692Y (en) * | 2003-08-21 | 2005-08-17 | 肖公亮 | Circum ferential invasion guard system for radio electromagnetic field leakage theory |
Non-Patent Citations (4)
| Title |
|---|
| Dong H.Kim.Radiation of a Leaky Coaxial Cable With Narrow Transverse Slots.《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》.2007,全文. |
| Radiation of a Leaky Coaxial Cable With Narrow Transverse Slots;Dong H.Kim;《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》;20070131;全文 * |
| 新型开槽漏泄同轴电缆传输损耗的初步研究;郭丽丽;《中国通信学会2010年光缆电缆学术年会论文集》;20101231;全文 * |
| 郭丽丽.新型开槽漏泄同轴电缆传输损耗的初步研究.《中国通信学会2010年光缆电缆学术年会论文集》.2010,全文. |
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| CN102110865A (en) | 2011-06-29 |
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