CN101431185A - Monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line - Google Patents

Monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line Download PDF

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Publication number
CN101431185A
CN101431185A CNA2008100866117A CN200810086611A CN101431185A CN 101431185 A CN101431185 A CN 101431185A CN A2008100866117 A CNA2008100866117 A CN A2008100866117A CN 200810086611 A CN200810086611 A CN 200810086611A CN 101431185 A CN101431185 A CN 101431185A
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CN
China
Prior art keywords
transmission line
antenna
signal feed
frequency
dual
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CNA2008100866117A
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Chinese (zh)
Inventor
钟世忠
王侑信
郑裕强
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Getac Technology Corp
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Mitac Technology Corp
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Priority to CNA2008100866117A priority Critical patent/CN101431185A/en
Publication of CN101431185A publication Critical patent/CN101431185A/en
Pending legal-status Critical Current

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Abstract

A monopole dual-frequency antenna for an aerial signal to be fed in from the short-circuit terminal of a transmission line is a design for achieving dual-frequency effect by a single antenna. The monopole dual-frequency antenna comprises an antenna extension section and a transmission line load, wherein, the antenna extension section is provided with a top end and a transmission line connecting terminal, and the transmission line connecting terminal is connected with the transmission line load; the transmission line load comprises a center transmission line, an outer-ring conductor and a dielectric substance, wherein, the center transmission line is provided with an extension section connecting terminal and a signal feed-in terminal, and is connected with the transmission line connecting terminal of the antenna extension section by the extension section connecting terminal; and the outer-ring conductor annularly covers the periphery of the center transmission line at a preset distance, and is provided with an open terminal and a short-circuit terminal.

Description

Monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line
Technical field
The invention relates to a kind of design of unipole antenna, particularly about a kind of monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line.
Background technology
Along with electronic products such as communication product such as PDA(Personal Digital Assistant), mobile phone, notebook computer gradually toward compact direction design, add increase to the wireless network demand, make the miniaturization of antenna become the important demand of radio communication product.
Numerous dipole antenna, unipole antenna, flat plane antenna, cycle antenna or the disc-shaped antennas etc. of being divided into of antenna system, the existing at present technology at the variety classes antenna applications is developed out.
Aspect patented technology, for example TaiWan, China patent of invention Announcement Number is M285057 number, promptly discloses a kind of double frequency mono-polar antenna.In this patent, double frequency mono-polar antenna includes a substrate, one first antenna, one second antenna, an impedance path portion and a grounding parts.
On substrate one end face, be respectively equipped with two independently and first antenna and second antenna, and be provided with a grounding parts with respect to first antenna and its same distolateral place of second antenna with different frequencies of utilization.Grounding parts is arranged at first antenna and its same distolateral place of second antenna with a preset space length, and the grounding parts impedance path portion that stretches out and be provided with at least more than one between with respect to this first antenna and second antenna.
Impedance path portion is the parallel relative of level with this first antenna and second antenna respectively, and can provide first antenna and second antenna on substrate, to have when sending unlike signal separately in the space of lines, the obstruct mechanism that can know as first antenna and its radiation signal of second antenna by impedance path portion.
Summary of the invention
The technical problem that institute of the present invention desire solves
Yet no matter how antenna designs the double frequency mono-polar antenna in preceding case, needs design as first antenna and second antenna as reaching double frequency resonance.Double frequency mono-polar antenna in preceding case not only needs the design of two antennas of first antenna and second antenna, and its antenna volume is big and outward appearance is higher and do not meet the demand of radio communication product now.
Therefore, main purpose of the present invention promptly provides a kind of unipole antenna with load transmission line, being reduced in order to the double frequency resonance functional that will originally need two unipole antennas only needs single unipole antenna, and the slim-lined construction of keeping a unipole antenna is to help the assembling of antenna.
Another object of the present invention provides a kind of easy making and the simple double frequency mono-polar antenna of the course of processing.
The technological means that the present invention deals with problems
The present invention is to be series at unipole antenna and length is used as inductive load less than the quarter-wave transmission line load of operation frequency range by one for the technological means that problem adopted that solves known techniques, in order to the frequency that reduces high-frequency resonance to reach the effect that can produce double frequency (dual band) at single unipole antenna.
In transmission line load of the present invention and the unipole antenna relevant position, an end of antenna extension of section is the top, and the other end is the transmission line link and links the transmission line load that has as load.
In preferred embodiment of the present invention, transmission line load includes a center transmission line, an outer shroud conductor and a dielectric medium.Center transmission line has an extension of section link and a short-circuit end, and the extension of section link is connected in the transmission line link of antenna extension of section.
The outer shroud conductor is that distance one preset space length and ring are overlying on chow ring conductor outside the center transmission line, and can be constituted by the coating net of coaxial cable.This outer shroud conductor is one to have the open architecture of open end and short-circuit end, and and center transmission line between accompany a dielectric medium.
The present invention contrasts the effect of prior art
By the technology used in the present invention means, can be used as the characteristic of inductive load because of transmission line structure so that add the unipole antenna of transmission line load, and reach function with control high-rder mode resonance frequency with transmission line load.So a kind of unipole antenna that includes as the load transmission line of inductive load can be provided, will need neither double frequency resonance functional to be reduced to the function that only needs a single unipole antenna can have double frequency to resonate originally with the unipole antenna of circuit length.
In addition, be additional in the unipole antenna as transmission line structure, can use existing coaxial cable simply to process and finish with transmission line load.Make the present invention in practical application, have easy making and can keep the advantage of unipole antenna elongated appearance with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line.And can and dwindle its outward appearance length of unipole antenna of the present invention again by single bending, more can meet the compact design direction of portable electronic product now to increase application.
Description of drawings
For can clearer understanding purpose of the present invention, characteristics and advantage, below with reference to accompanying drawing preferred embodiment of the present invention is further described, wherein:
Fig. 1 shows the first embodiment stereogram of the present invention with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line;
Fig. 2 is the 2-2 profile among displayed map 1 embodiment;
Fig. 3 shows the second embodiment stereogram of the present invention with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line;
Fig. 4 is the 4-4 profile among displayed map 3 embodiment;
Fig. 5 shows the three embodiment stereogram of the present invention with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line;
Fig. 6 is the 6-6 profile among displayed map 5 embodiment;
Fig. 7 shows the four embodiment stereogram of the present invention with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line;
Fig. 8 is the 8-8 profile among displayed map 7 embodiment;
Fig. 9 shows the five embodiment stereogram of the present invention with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line.
Figure 10 is the 6th embodiment stereogram that shows the monopole dual-frequency antenna of transmission line load of the present invention;
Figure 11 is the 12-12 profile that shows among Figure 11 embodiment;
Figure 12 is that the endless tube body is the profile of outer conductor beyond showing;
Figure 13 is that helicoid is the profile of outer conductor beyond showing;
Figure 14 shows the seven embodiment stereogram of the present invention with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line.
Embodiment
Consult the 2-2 profile of the present invention shown in Fig. 1 simultaneously with Fig. 1 embodiment shown among the first embodiment stereogram of the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line and Fig. 2.
One end of antenna extension of section 1 is top 11, and the other end is transmission line link 12 and links a transmission line load 2 is arranged.And the length of antenna extension of section 1 is antenna extension of section length L R, the length of transmission line load 2 is the short-circuited transmission line length L T, and the total length L of monopole dual-frequency antenna ABe antenna extension of section length L RAdd the short-circuited transmission line length L T
Transmission line load 2 comprises a center transmission line 21, an outer shroud conductor 22 and a dielectric medium 23.Center transmission line 21 can have an extension of section link 211 and a signal feed side 212.Extension of section link 211 is connected in the transmission line link 12 of antenna extension of section 1.Outer shroud conductor 22 is for distance one preset space length and encircle the outside chow ring conductor that is overlying on center transmission line 21, can be constituted by the coating net of coaxial cable.Outer shroud conductor 22 has an open end 221 and a short-circuit end 222.The open end 222 of outer shroud conductor 22 is close to the extension of section link 211 of center transmission line 21.The signal feed side 212 of center transmission line 21 is the short-circuited transmission line length L of transmission line load 2 to the open end 221 of outer shroud conductor 22 T
Accompany a dielectric medium 23 between center transmission line 21 and the outer shroud conductor 22, and dielectric medium 23 can be simple air dielectric or constitutes as the material that polyethylene foamed etc. has an insulating property (properties).
Among the present invention, add the function that an electric capacity or inductive load have control second resonance frequency (high frequency), reach similar effects as load so the designed monopole dual-frequency antenna of the present invention is a transmission line structure by transmission line load 2 in antenna.And transmission line load 2 itself can be used as a short-circuited transmission line (short circuit/shortcircuited), and the quarter-wave (quarter wave length) that approximates second operation frequency range greatly as transmission line load length L T then can become the inductive load that is series at antenna extension of section 1.
For unipole antenna, inductive load can influence the frequency of second resonance, thus can go to control the frequency of second resonance by suitable adjustment transmission line load length L T, and then reach the effect that can produce double frequency in monopole dual-frequency antenna of the present invention.In the designed monopole dual-frequency antenna of the present invention, the Design of length of the signal feed side 212 of center transmission line 21 to the open end 221 of outer shroud conductor 22 is the equivalent quarter-wave of high-frequency resonance frequency, and the equivalent quarter-wave of first resonance frequency (low frequency) that the length summation of unipole antenna 1 and transmission line load 2 is designed to be scheduled to.
Consult the 4-4 profile of the present invention shown in Fig. 3 simultaneously with Fig. 3 embodiment of showing among the second embodiment stereogram of the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line and Fig. 4.
One end of antenna extension of section 1 is top 11, and the other end is transmission line link 12 and links transmission line load 3 is arranged.Transmission line load 3 includes the lead 341,342 of a center transmission line 31, a collar 32, a bearing ring 33 and pair of parallel.Center transmission line 31 has an extension of section link 311 and a signal feed side 312.Extension of section link 311 is connected in the transmission line link 13 of antenna extension of section 1.
32 of the collars are installed on extension of section link 311 places of center transmission line 31 and include an open end 321, and bearing ring 33 is arranged at the signal feed side 312 near center transmission line 31.The collar 32 and bearing ring 33 are for distance one preset space length and be placed on the center transmission line 31 two ends down, and with 341,342 connections of lead of pair of parallel.Air dielectric that can be simple between two leads 341,342 and the center transmission line 31 or isolated a preset distance as nonconducting dielectric materials such as polyethylene foameds.
Transmission line load 2 its outer shroud conductors 23 in Fig. 2 embodiment are by 341,342 replacements of two among Fig. 3 embodiment corresponding leads.
Be the 3rd embodiment stereogram of the monopole dual-frequency antenna of transmission line load of the present invention as shown in Figure 5, and consult the 6-6 profile of Fig. 5 embodiment shown in Figure 6 simultaneously.
One end of antenna extension of section 1 is top 11, and the other end is transmission line link 12 and links a transmission line load 4 is arranged.Transmission line load 4 comprises a center transmission line 41, an outer shroud conductor 42 and a dielectric medium 43.Center transmission line 41 has an extension of section link 411 and a signal feed side 412 that is connected in load link 12.
Outer shroud conductor 42 is for distance one preset space length and encircle the outside chow ring conductor that is overlying on center transmission line 21, can be made of the flexible metal hose of tool.Outer shroud conductor 42 has an open end 421 and a short-circuit end 422, and the open end 421 of outer shroud conductor 42 is approached antenna extension of section 1 place and made the outer shroud conductor form an open architecture towards antenna extension of section 1.
Accompany a dielectric medium 43 between center transmission line 41 and the outer shroud conductor 42, and dielectric medium 43 can be simple air dielectric or constitutes as the material that polyethylene foamed etc. has an insulating property (properties).
Be the 4th embodiment stereogram of the monopole dual-frequency antenna of transmission line load of the present invention as shown in Figure 7, and consult the 8-8 profile of Fig. 7 embodiment shown in Figure 8 simultaneously.
One end of antenna extension of section 1 is top 11, and the other end is transmission line link 12 and links a transmission line load 5 is arranged.Transmission line load 5 comprises a center transmission line 51, an outer shroud conductor 52 and a dielectric medium 53.Center transmission line 51 has an extension of section link 511 and a signal feed side 512 that is connected in load link 12.
Outer shroud conductor 52 is overlying on the outside chow ring conductor of center transmission line 51 for distance one preset space length and ring, and can be made of a bearing ring 521 and a helical tube body 522 that closely twines with zero spacing.One end of helical tube body 522 is connected in airtight bearing ring 521, and has an open architecture in transmission line link 12 places near antenna extension of section 1.
Accompany a dielectric medium 53 between center transmission line 51 and the outer shroud conductor 52, and dielectric medium 53 can be simple air dielectric or constitutes as the material that polyethylene foamed etc. has an insulating property (properties).
In Fig. 9, it is to show the five embodiment stereogram of the present invention with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line.One end of antenna extension of section 1 is top 11, and the other end is transmission line link 12 and links a transmission line load 2 is arranged.The signal feed side 212 of transmission line load 2 can supply signal feed-in thus.Antenna extension of section 1 can be seen length to shorten outside the monopole dual-frequency antenna by folding mode, but does not influence the path-length of antenna extension of section 1.
In Figure 10, it is the 6th embodiment stereogram that shows the monopole dual-frequency antenna of transmission line load of the present invention, and is the profile of the different embodiment of outer conductor among 10 figure in the 11st, 12 with 13 figure.
Consult the 10th simultaneously with shown in Figure 11, the center transmission line 21 of transmission line load 2 has the antenna connection terminal 211 and a short-circuit end 212 of the transmission line link 12 that is connected in antenna extension of section 1a.
Center transmission line 21 ring is covered with outer shroud conductor 22, and the open end 221 of outer shroud conductor 22 be the open architecture of opening towards antenna extension of section 1a, and the short-circuit end 222 of the other end for sealing.In addition, accompany a dielectric medium 23 between center transmission line 21 and the outer shroud conductor 22.
As shown in Figure 11, outside antenna extension of section 1a place, be covered with outer conductor 13, but that the two ends of outer conductor 13 are all closed blind end 131,132 is different with the outer shroud conductor 22 of the open architecture that includes open end 221 as coaxial cable.And between antenna extension of section 1a and outer conductor 13, be gripped with a dielectric medium 133.The outer conductor 13 that antenna extension of section 1a passes through to be comprised can obtain thick diameter section and obtain bigger frequency range.
As shown in Figure 12, outside near antenna extension of section 1a place, be covered with one and have flexual outer shroud body 14, and the two ends of outer shroud body 14 are all airtight blind end 141,142.And between antenna extension of section 1a and outer shroud body 14, be gripped with a dielectric medium 143.The outer shroud body 14 that antenna extension of section 1a utilizes on it and comprised can obtain thick diameter section and obtain bigger frequency range.
As shown in Figure 13, outside near antenna extension of section 1a place, be covered with an external spiral body 15, and the two ends of external spiral body 15 are all closed bearing ring 151,152.And between antenna extension of section 1a and external spiral body 15, be gripped with a dielectric medium 153.Antenna extension of section 1a makes the section that itself has thick diameter and obtains bigger frequency range with the external spiral body 15 that is comprised.
Consult shown in Figure 14ly, it is to show the seven embodiment stereogram of the present invention with the monopole dual-frequency antenna of antenna signal feed-in from shorted junction of transmission line.Casing 6 surperficial appropriate locations in electronic equipment offer a transmission line bearing seat 61, and the signal feed side 212 of transmission line load 2 can be installed on casing 6 surfaces by the transmission line bearing seat 61 on casing 6 surfaces.
Signal feed side 212 through the transmission line bearing seat 61 on casing 6 surfaces be connected in one can with the circuit board 62 of monopole dual-frequency antenna coupling on, and this circuit board 62 is installed on an end of casing 6.The live wire 631 that utilizes a FD feed cabling 63 1 ends and the signal feed side 212 of transmission line load 2 are mutually in succession.The other end is connected with casing 6 as ground wire, and makes casing 6 become the some of monopole dual-frequency antenna.
By above embodiment as can be known, the value on the true tool industry of the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line provided by the present invention was so the present invention had accorded with the important document of patent already.But above narration only is preferred embodiment of the present invention explanation, allly is skillful in this operator when can doing other all improvement that is equal to according to above-mentioned explanation, and these change and still belong in invention spirit of the present invention and the following claim that is defined.

Claims (15)

1. monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line comprises:
One transmission line load includes:
One center transmission line has an extension of section link and a signal feed side;
One outer shroud conductor overlays on the chow ring of this center transmission line with a preset space length ring, and this outer shroud conductor has an open end and a short-circuit end;
One antenna extension of section has a top and a transmission line link, and wherein this transmission line link is the extension of section link that is connected in this center transmission line.
2. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that also including a dielectric medium between this center transmission line and this outer shroud conductor.
3. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 2 is characterized in that this dielectric medium is dielectrics such as air, polyethylene foamed.
4. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that this transmission line load is the transmission line that is made of a coaxial cable, and the coating net that this outer shroud conductor is this coaxial cable constitutes.
5. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that the outer shroud conductor of this transmission line load is made of at least two corresponding leads.
6. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that the outer shroud conductor of this transmission line load is made of helical tube body.
7. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1, the outer shroud conductor that it is characterized in that this transmission line load are to be made of institute's metal hose.
8. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that this transmission line load is as the inductive load that is series at this unipole antenna.
9. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1, the signal feed side that it is characterized in that this center transmission line to the open end of this outer shroud conductor be a short-circuited transmission line length, and this short-circuited transmission line Design of length is the equivalent quarter-wave of the second predetermined resonance frequency, and the summation of the length of this antenna extension of section and this this short-circuited transmission line length is the total length of this monopole dual-frequency antenna, and the equivalent quarter-wave of first resonance frequency that is designed to be scheduled to.
10. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that this antenna extension of section place has the outer conductor of thick diameter, in order to improve frequency range.
11. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that this antenna extension of section place has the outer shroud body of thick diameter, in order to improve frequency range.
12. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that this antenna extension of section place has the external spiral body of thick diameter, in order to improve frequency range.
13. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that the signal feed side of this center transmission line is connected in a circuit board that can mate by a FD feed cabling, and is installed on an end of casing.
14. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 13 is characterized in that the end that this FD feed cabling and this center transmission line are joined is a live wire, and an end that is connected to this casing is a ground wire.
15. the monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line according to claim 1 is characterized in that this transmission line load is further to side-foldable, in order to shorten the length of this transmission line load.
CNA2008100866117A 2007-11-08 2008-03-20 Monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line Pending CN101431185A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100866117A CN101431185A (en) 2007-11-08 2008-03-20 Monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN200710166994.4 2007-11-08
CN200710166994 2007-11-08
CNA2008100866117A CN101431185A (en) 2007-11-08 2008-03-20 Monopole dual-frequency antenna with antenna signal feed-in from shorted junction of transmission line

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CN101431185A true CN101431185A (en) 2009-05-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102148420A (en) * 2010-12-24 2011-08-10 连展科技电子（昆山）有限公司 Integrated coaxial feed-in single-frequency antenna

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102148420A (en) * 2010-12-24 2011-08-10 连展科技电子（昆山）有限公司 Integrated coaxial feed-in single-frequency antenna
CN102148420B (en) * 2010-12-24 2014-04-16 连展科技电子（昆山）有限公司 Integrated coaxial feed-in single-frequency antenna

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Application publication date: 20090513