CN103138038B - Impedance matching method of telemetry, track and command (TT&C) antenna - Google Patents
Impedance matching method of telemetry, track and command (TT&C) antenna Download PDFInfo
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- CN103138038B CN103138038B CN201310059532.8A CN201310059532A CN103138038B CN 103138038 B CN103138038 B CN 103138038B CN 201310059532 A CN201310059532 A CN 201310059532A CN 103138038 B CN103138038 B CN 103138038B
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Abstract
The invention relates to an impedance matching method of a telemetry, track and command (TT&C) antenna. The method that a deployment cap is added at the top end of an antenna feeder tube is adopted to change electric field distribution in the feeder tube and to regulate the position of a voltage minimum point, and then a quarter-wave impedance matching tube is utilized to perform standing-wave ratio (SWR) regulation so as to enable the SWR of the quadrifilar helix TT&C antenna to be smaller than 1.2, and the problems that the voltage minimum point of the quadrifilar helix TT&C antenna exceeds the top end of the feeder tube and the quarter-wave impedance matching tube can not be utilized to perform the SWR regulation are solved. In addition, the structure of the deployment cap is designed ingeniously, and reliable connection is enabled to be formed between the deployment cap and the top end of the feeder tube; and optimization design is performed on material of the deployment cap, and therefore the deployment cap is enabled to be small in size and light in weight, and has no effect on other electrical performance of the antenna and the structural reliability.
Description
Technical field
The present invention relates to a kind of impedance matching methods of TT&C antenna, belong to spaceborne TT&C antenna field.
Background technology
Four arm spiral TT&C antennas adopt coaxial feed mode usually, helical antenna impedance to be mated with 50 Ω radio-frequency input signalss, reduce mismatch loss, be typically employed in the mode that feedback tube voltage smallest point position adds coupling pipe, carry out impedance adjustment by the diameter and length that adjust coupling pipe, make four arm spiral TT&C antenna voltage standing wave ratioes be less than 1.5.The limitation of this impedance adjustment method is, in the conductor, the voltage smallest point of therefore presenting pipe must within the scope of inner wire actual size for coupling pipe box.
Because four arm spiral TT&C antenna feedback length of tube are shorter, its voltage smallest point, beyond the actual size scope of inner wire, has exceeded feedback pipe top, cannot carry out standing-wave ratio adjustment with quarter-wave impedance matching pipe.
Summary of the invention
The object of the invention is to the above-mentioned deficiency overcoming prior art, a kind of impedance matching methods of TT&C antenna is provided, the method adds the method for allotment cap on TT&C antenna feedback pipe top by adopting, change the Electric Field Distribution in feedback pipe, the position of regulation voltage smallest point, make voltage smallest point move to feedback pipe inner, and then utilize quarter-wave impedance matching pipe to carry out standing-wave ratio adjustment, make four arm spiral TT&C antenna standing-wave ratios be less than 1.2.
Above-mentioned purpose of the present invention is mainly achieved by following technical solution:
A kind of impedance matching methods of TT&C antenna, allotment cap is increased on the feedback pipe top of TT&C antenna, change the Electric Field Distribution in feedback pipe, voltage smallest point is made to move to feedback pipe inner, then size or the position of overlapping coupling pipe in the conductor in TT&C antenna is regulated, or size and position regulate simultaneously, TT&C antenna standing-wave ratio is made to be less than 1.2.
In the impedance matching methods of above-mentioned TT&C antenna, allotment cap is polyimides, material or the multiple material of quartz fibre prepare glass fibre again.
In the impedance matching methods of above-mentioned TT&C antenna, allotment cap is stepped, comprise upper end and bottom, shape, the size of the shape of upper end, size and feedback pipe external diameter match, and shape, the size of the shape of bottom, size and feedback bore match.
In the impedance matching methods of above-mentioned TT&C antenna, the upper end of allotment cap is cylindrical shape, and bottom is crescent step.
In the impedance matching methods of above-mentioned TT&C antenna, the thickness of the bottom of allotment cap is 1.5-2.5mm.
In the impedance matching methods of above-mentioned TT&C antenna, there are two boss the bottom of allotment cap, and feedback pipe top is inserted in the bottom of allotment cap, and two boss are stuck in two grooves on feedback pipe top, and upper end is exposed at outside feedback pipe.
In the impedance matching methods of above-mentioned TT&C antenna, fix with epoxy glue between allotment cap and feedback pipe.
In the impedance matching methods of above-mentioned TT&C antenna, inner wire is deeply presented in pipe, and one end is threaded connection with feedback pipe.
In the impedance matching methods of above-mentioned TT&C antenna, the size of the coupling pipe overlapped in the conductor in TT&C antenna is regulated to comprise diameter and/or the length of adjustment coupling pipe.
The present invention's advantage is compared with prior art:
(1), a kind of impedance matching methods of TT&C antenna of innovative design of the present invention, on the basis not changing TT&C antenna original structure size, increase only an allotment cap, change the Electric Field Distribution in feedback pipe, the position of voltage smallest point is adjusted to feedback pipe inner, meet quarter-wave impedance matching demand; Solve four arm spiral TT&C antenna voltage smallest point and exceed feedback pipe top, the problem of standing-wave ratio adjustment cannot be carried out with quarter-wave impedance matching pipe;
(2), the structure of the present invention to allotment cap carries out ingehious design, allotment cap is made to form reliable connection with feedback pipe top, and design is optimized to the material of allotment cap, the allotment cap size made is little, lightweight, on other electrical property of antenna and structural reliability without impact;
(3), the present invention has carried out further optimal design by the size (comprising diameter, thickness etc.) of lot of experiments to allotment cap, the reliability that allotment cap is connected with feedback pipe reaches optimum, thus well meets quarter-wave impedance matching demand;
(4), the present invention adopts the method adding allotment cap on TT&C antenna feedback pipe top, change the Electric Field Distribution in feedback pipe, the position of regulation voltage smallest point, voltage smallest point is made to move to feedback pipe inner, and then utilize quarter-wave impedance matching pipe to carry out standing-wave ratio adjustment, make four arm spiral TT&C antenna standing-wave ratios be less than 1.2.
Accompanying drawing explanation
Fig. 1 is the present invention four arm spiral TT&C antenna structural representation;
Fig. 2 is that the present invention allocates cap schematic diagram;
Wherein A is the front view of allotment cap; B is the left view of allotment cap; C is the vertical view of allotment cap;
Fig. 3 is that the present invention presents tubular construction schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
If Fig. 1 is the present invention four arm spiral TT&C antenna structural representation, TT&C antenna comprises feedback pipe 1, inner wire 3, coupling pipe 4 and allotment cap 2 as seen from the figure, coupling pipe 4 is enclosed within inner wire 3, coupling pipe 4 and inner wire 3 are positioned at presents pipe 1 inside, inner wire 3 is deeply presented in pipe 1, one end is threaded connection with feedback pipe 1, and allotment cap 2 is connected with feedback pipe 1 top.By diameter, the length and location adjustment antenna standing wave ratio of adjustment coupling pipe 4, be transferred to after below 1.2 until standing-wave ratio, allotment cap 4 and feedback pipe 1 are fixed with epoxy glue.
Be illustrated in figure 2 the present invention and allocate cap schematic diagram, wherein A be the allotment front view of cap, the B left view that is allotment cap, the C vertical view that is allotment cap, allotment cap 2 is stepped, comprise upper end 5 and bottom 6, shape, the size of the shape of upper end 5, size and feedback pipe 1 external diameter match, such as shape is circle, and diameter is identical.Shape, the size of the shape of bottom 6, size and feedback pipe 1 internal diameter match, and ensure that allotment cap 2 is reliably connected with feedback pipe 1, the thickness allocating the bottom 6 of cap 2 is 1.5-2.5mm.Allotment cap 2 is polyimides, material answered by glass fibre or the multiple material of quartz fibre prepares, and allocates cap 2 and adopt polyimides in the present embodiment.
The upper end 5 allocating cap 2 in the present embodiment is that diameter 10mm(is identical with feedback pipe 1 external diameter), the cylindrical shape of thickness 1mm, bottom 6 is crescent step, thickness 2.5mm, diameter 6.9mm is identical with feedback pipe 1 internal diameter, the groove 10 that on allotment cap 2,3.5mm is wide is measure-alike with feedback pipe 1 top projection, and the boss 7 that the crescent step both sides, bottom 6 allocating cap 2 have two 2mm wide.
Be illustrated in figure 3 the present invention and present tubular construction schematic diagram, give partial enlarged drawing and the profile on feedback pipe 1 top in Fig. 3, during practical set, coupling pipe 4 is enclosed within inner wire 3, and inner wire 3 is deeply presented in pipe 1 and is threaded connection with feedback pipe 1 top dead center position place.The crescent step part of allotment cap 2 inserts feedback pipe 1 top, and two boss 7 are stuck in wide groove 8 place of feedback two, pipe 1 top 2mm, and the column part of diameter 10mm is exposed at outside feedback pipe 1.
By diameter, the length and location adjustment antenna standing wave ratio of adjustment coupling pipe 4, be transferred to after below 1.2 until standing-wave ratio, allotment cap 2 and feedback pipe 1 are fixed with epoxy glue.Obtain by Impedance Matching on Transmission Line theory calculate the size (comprising diameter, length) and the location parameter that mate pipe 4 in actual mechanical process, and obtain actual standing-wave ratio by actual test, if undesirable, again the coupling diameter of pipe 4, length and location parameter are finely tuned, until meet standing-wave ratio requirement.
The above; be only the embodiment of the best of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
The content be not described in detail in specification of the present invention belongs to the known technology of professional and technical personnel in the field.
Claims (7)
1. the impedance matching methods of a TT&C antenna, it is characterized in that: increase allotment cap (2) on feedback pipe (1) top of TT&C antenna, change the Electric Field Distribution in feedback pipe, voltage smallest point is made to move to feedback pipe (1) inner, then the size or the position that are enclosed within the coupling pipe (4) on inner wire (3) in TT&C antenna is regulated, or size and position regulate simultaneously, TT&C antenna standing-wave ratio is made to be less than 1.2; Described allotment cap (2) is for stepped, comprise upper end (5) and bottom (6), shape, the size of the shape of upper end (5), size and feedback pipe (1) external diameter match, and shape, the size of the shape of bottom (6), size and feedback pipe (1) internal diameter match; There are two boss (7) bottom (6) of described allotment cap (2), feedback pipe (2) top is inserted in the bottom (6) of allotment cap (2), two boss (7) are stuck in two groove (8) places on feedback pipe (1) top, and upper end (5) are exposed at feedback pipe (2) outward.
2. the impedance matching methods of a kind of TT&C antenna according to claim 1, is characterized in that: described allotment cap (2) is polyimides, material or the multiple material of quartz fibre prepare glass fibre again.
3. the impedance matching methods of a kind of TT&C antenna according to claim 1, is characterized in that: the upper end (5) of described allotment cap (2) is cylindrical shape, and bottom (6) are crescent step.
4. the impedance matching methods of a kind of TT&C antenna according to claim 1 or 3, is characterized in that: the thickness of the bottom (6) of described allotment cap (2) is 1.5-2.5mm.
5. the impedance matching methods of a kind of TT&C antenna according to claim 1, is characterized in that: fix with epoxy glue between described allotment cap (2) and feedback pipe (1).
6. the impedance matching methods of a kind of TT&C antenna according to the arbitrary claim of claim 1-3, is characterized in that: described inner wire (3) is deeply presented in pipe (1), and one end is managed (1) with feedback and is threaded connection.
7. the impedance matching methods of a kind of TT&C antenna according to claim 1, is characterized in that: the size being enclosed within the coupling pipe (4) on inner wire (3) in described adjustment TT&C antenna comprises the diameter and/or length that regulate coupling pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310059532.8A CN103138038B (en) | 2013-02-26 | 2013-02-26 | Impedance matching method of telemetry, track and command (TT&C) antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310059532.8A CN103138038B (en) | 2013-02-26 | 2013-02-26 | Impedance matching method of telemetry, track and command (TT&C) antenna |
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| Publication Number | Publication Date |
|---|---|
| CN103138038A CN103138038A (en) | 2013-06-05 |
| CN103138038B true CN103138038B (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310059532.8A Active CN103138038B (en) | 2013-02-26 | 2013-02-26 | Impedance matching method of telemetry, track and command (TT&C) antenna |
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| CN (1) | CN103138038B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397246B (en) * | 2020-10-26 | 2022-03-08 | 中国电子科技集团公司第二十九研究所 | Dipole antenna structure and cable assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0469741A1 (en) * | 1990-08-02 | 1992-02-05 | Symmetricom, Inc. | Radio frequency apparatus |
| EP0521511A2 (en) * | 1991-07-05 | 1993-01-07 | Sharp Kabushiki Kaisha | Back fire helical antenna |
| CN1340225A (en) * | 1999-02-08 | 2002-03-13 | 萨兰特尔有限公司 | Helical antenna for frequencies in excess of 200 MHZ |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2420230B (en) * | 2004-11-11 | 2009-06-03 | Sarantel Ltd | A dielectrically-loaded antenna |
| GB2477289B (en) * | 2010-01-27 | 2014-08-13 | Harris Corp | A radio communication apparatus having improved resistance to common mode noise |
| US20110215986A1 (en) * | 2010-03-04 | 2011-09-08 | Sarantel Limited | Antenna Assembly |
-
2013
- 2013-02-26 CN CN201310059532.8A patent/CN103138038B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0469741A1 (en) * | 1990-08-02 | 1992-02-05 | Symmetricom, Inc. | Radio frequency apparatus |
| EP0521511A2 (en) * | 1991-07-05 | 1993-01-07 | Sharp Kabushiki Kaisha | Back fire helical antenna |
| CN1340225A (en) * | 1999-02-08 | 2002-03-13 | 萨兰特尔有限公司 | Helical antenna for frequencies in excess of 200 MHZ |
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| CN103138038A (en) | 2013-06-05 |
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