CN103682558A - Satellite phone omnidirectional receiving antenna - Google Patents
Satellite phone omnidirectional receiving antenna Download PDFInfo
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- CN103682558A CN103682558A CN201310630003.9A CN201310630003A CN103682558A CN 103682558 A CN103682558 A CN 103682558A CN 201310630003 A CN201310630003 A CN 201310630003A CN 103682558 A CN103682558 A CN 103682558A
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- satellite phone
- antenna
- circular cone
- reception antenna
- spiral unit
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Abstract
The invention discloses a satellite phone omnidirectional receiving antenna which comprises a fixing underpan (3), a mounting column (4), a fixing device (1) and two single-arm cone logarithmic spiral units (2). One end of the mounting column (4) is arranged at the center of the fixing underpan (3), the bottoms of the single-arm cone logarithmic spiral units (2) are fixed on the fixing underpan (3) while the tops of the same are fixed at the other end of the mounting column (4) through the fixing device (1). The satellite phone omnidirectional receiving antenna has the characteristics of excellent wide-wave-beam circular polarization, low elevation angle and high gain, satellite signals can be received by vertically mounting the antenna, and the antenna can adapt to marine application of high-latitude regions without adjusting the direction of the antenna. The satellite phone omnidirectional receiving antenna has the advantages of 180-degree wave beam width, good directional diagram and gain factor, low input resistance, high signal receiving or emitting quality and the like.
Description
Technical field
The present invention relates to technical field of satellite communication, be specifically related to the comprehensive reception antenna of satellite phone.
Background technology
Since nearly half a century, along with the globalization of capital, industry, resource provisioning, flow of personnel, global communication industry obtains significant progress.Owing to having, wide coverage, promptness are strong, networking flexibility in satellite communication, the feature such as without geographical constraints, its field that is related to national security and national economy in Aero-Space, military affairs, disaster alarm and rescue, navigation, communications and transportation, television broadcasting, financial service etc. is widely used, obtained larger development, satellite communication in recent years is also being opened up and is being expanded new application.
The maximum feature of satellite mobile communication is to utilize the multicast mode of satellite communication, for global user provide large span, on a large scale, roaming and motor-driven, Mobile Communication Service flexibly at a distance, expansion and the extension of land cellular mobile communications system, in remote area, mountain area, island, be subject to disaster area, ocean-going vessel to only reach the communication aspects such as oceangoing voyage aircraft to have more unique superiority.
After purchase AsiaSat of international mobile-satellite company (Inmarsat), the system that just adopts AsiaSat provides satellite mobile communication service for Asia.AsiaSat adopts the communication system of Ericsson, Ericsson exits behind satellite mobile communication market, on equipment and product, just do not occur upgrading, the equipment of old Ericsson exists equipment performance poor, the problem that speech quality is low, repair rate is high, and while also having, search, less than the problem of satellite, needs to adopt removal search satellite is manually set simultaneously.
Antenna is in radio communication or microwave communication, to be used for launching or receiving electromagnetic parts.The quality of antenna is directly connected to the quality of the electromagnetic wave signal of transmitting or reception.Conventionally directional diagram, gain coefficient, input impedance, efficiency and the frequency bandwidth etc. for quality of antenna are evaluated.
What the satellite phone antenna of AsiaSat adopted is the Monobrachial spiral passive antenna of Ericsson's standard configuration, it is single mode/narrow beam antenna, its beamwidth only has 70 degree, the needs that adapt to receiving satellite signal in navigation by the mode that middle needs are often adjusted antenna, the broad beam antenna using in industry at present also often only has the beamwidth of 120 degree, this antenna is when using higher than 60 degree latitude areas, because relative marine satellite is in visual angle, the low elevation angle, be subject to the impact of antenna polarization, antenna gain is too low, a little less than reception signal, cause call completing rate low, cutting off rate is high.
Summary of the invention
While using satellite phone in order to overcome prior art in high latitude area, adopt the Monobrachial spiral passive antenna of standard configuration and only have the technical scheme of broad beam antenna of the beamwidth of 120 degree, because relative marine satellite is in visual angle, the low elevation angle, the impact of polarization, antenna gain is too low, receive signal weak, cause the technical problem that call completing rate is low, cutting off rate is high, the invention provides the comprehensive reception antenna of satellite phone.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
The comprehensive reception antenna of satellite phone, comprise fixed underpan, erection column, fixture, two single armed circular cone logarithm spiral unit, one end of erection column is arranged on fixed underpan center, the bottom of single armed circular cone logarithm spiral unit is fixed on fixed underpan, and the top of single armed circular cone logarithm spiral unit is fixed on other one end of erection column by fixture.
Operation principle of the present invention is, circular cone logarithm spiral unit, the beamwidth with 180 degree, two single armed circular cone logarithm spiral unit adopt the symmetrical dipole mode cooperatively interacting to install, fixed underpan, erection column, fixture and two common antenna structures that form a circular cone stage body in single armed circular cone logarithm spiral unit, this structure has good frequency bandwidth, directional diagram, gain coefficient, lower input impedance, the signal quality that receives or launch is high, particularly in high latitude area, the design at this low elevation angle, be conducive to transmitting and receiving of signal, this structure also has the very strong force mechanisms of answering simultaneously, is adapted at working in high vibration, high strength environment.
While using satellite phone with prior art in high latitude area, the Monobrachial spiral passive antenna that adopts Ericsson's standard configuration with only have the technical scheme of broad beam antenna of the beamwidth of 120 degree to compare, the present invention adopts the erection column and the fixture that are arranged on fixed underpan to match on the basis of existing technology, by two single armed circular cone logarithm spiral cellular installations on fixed underpan, form the technical scheme of the satellite phone reception antenna of a truncated cone, technical scheme of the present invention is not disclosed in the prior art, do not have common practise energy and prior art to combine and obtain this programme simultaneously yet, the present invention has substantial feature, the present invention has the beamwidth of 180 degree, good directional diagram, gain coefficient, lower input impedance, the signal quality that receives or launch is high, in use, the vertical installation of antenna can receive satellite-signal, do not need to adjust the marine use that antenna direction can adapt to high latitude area, obtained substantial progress.
For further optimization, improve the resonance qualitly of single armed circular cone logarithm spiral unit and microwave signal, improve signal gain quality, as preferably, the comprehensive reception antenna of satellite phone, single armed circular cone logarithm spiral unit is identical with the axis of erection column and fixed underpan.
More than to the signal reception of the comprehensive reception antenna of satellite phone and the further improvement of emissivities.Two single armed circular cone logarithm spiral unit are identical with the axis of erection column and fixed underpan, this structure makes two single armed circular cone logarithm spiral unit become symmetrical dipole, be conducive to reception or the transmitting of satellite-signal, the single armed circular cone logarithm spiral unit of the beamwidth of two 180 degree is adopted in this way and is combined, the signal of can accepting better or launch an artificial satellite, this structure has good stress structure, Stability Analysis of Structures simultaneously.
For further optimization, improve the structural stability of fixed underpan, as preferably, fixed underpan is disk.
It is more than the further improvement to the stress structure stability of the comprehensive reception antenna of satellite phone.Fixed underpan is disk, this structure can make fixed underpan match with single armed circular cone logarithm spiral unit better, this fit structure has good stress structure, the stability that guarantees structure in the comprehensive reception antenna use of satellite phone, this structure is also to make two single armed circular cone logarithm spiral unit become the assurance of symmetrical dipole.
For further optimization, the disposal ability of the various polarized signals of single armed circular cone logarithm spiral unit, as preferably, single armed circular cone logarithm spiral unit is sheet logarithm spiral unit.
It is more than the further improvement to the comprehensive reception antenna signal reception of satellite phone or emissivities.Sheet logarithm spiral unit has more antenna area, better oscillator Signal Matching ability, and signal gain coefficient is good, input impedance is little, and efficiency is high.
For further optimization, improve the ability that the low elevation angle of arm circular cone logarithm spiral unit receives or transmits, as preferably, the bottom width of single armed circular cone logarithm spiral unit is 1～6 times of top width.
More than that the low elevation angle of the comprehensive reception antenna of satellite phone is received or the further improvement of the ability that transmits.The bottom width of single armed circular cone logarithm spiral unit is 1～6 times of satellite communication ability that can better adapt to different high latitude areas of top width.
For further optimization, the signal Transfer Quality after improve receiving, as preferably, the comprehensive reception antenna of satellite phone, also comprises feed Ba Lun, and feed Ba Lun is arranged on erection column, and feed Ba Lun is electrically connected to single armed circular cone logarithm spiral unit.
It is more than the further improvement to the signal reception of the comprehensive reception antenna of satellite phone.The comprehensive reception antenna of satellite phone, comprises feed Ba Lun, and feed Ba Lun is arranged on erection column, and feed Ba Lun is electrically connected to single armed circular cone logarithm spiral unit.Dipole antenna is balanced type antenna, and coaxial cable belongs to unbalanced line, if it is directly connected, the crust of coaxial cable just has high-frequency current to flow through, like this, will affect the radiation of antenna, adopt feed Ba Lun the electric current that flows into cable shield outside can be controlled to fall.
For further optimization, improve the adaptive capacity of feed Ba Lun to the comprehensive reception antenna of satellite phone, as preferably, feed Ba Lun is the combination of any or they in magnet ring Ba Lun, cylinder Ba Lun.
It is more than the further improvement to the conveying capacity of the satellite-signal receiving to the comprehensive reception antenna of satellite phone.In real world applications, can select as required magnet ring Ba Lun, cylinder Ba Lun, thereby meet better the needs of satellite phone communication.
For further optimization, improve the signal input quality of the feeder line of the comprehensive reception antenna of satellite phone, as preferably, the comprehensive reception antenna of satellite phone, also comprise impedance transformer, impedance transformer is arranged on fixed underpan, and impedance transformer is electrically connected to feed Ba Lun.
It is more than the further improvement to the signal transmission quality of the comprehensive reception antenna of satellite phone.Antenna is connected with feeder line, and best circumstance is that antenna feed impedance is pure resistance and the characteristic impedance that equals feeder line, and at this moment line feed terminals inactivity reflection, does not have standing wave on feeder line, and the input impedance of antenna is milder with the variation of frequency.The impedance matching that adopts impedance transformer can improve antenna, eliminates the reactive component in antenna feed impedance, makes resistive component approach as much as possible the characteristic impedance of feeder line.
For further optimization, improve the useful life of single armed circular cone logarithm spiral unit, as preferably, single armed circular cone logarithm spiral is provided with big envelope on unit.
It is more than the further improvement to the adaptive capacity to environment of the comprehensive reception antenna of satellite phone.On single armed circular cone logarithm spiral unit, big envelope is set, can makes the comprehensive reception antenna of satellite phone under outdoor environment, use for a long time, reduce aerial loss, improve useful life.
Compared with prior art, the invention has the beneficial effects as follows:
1. while using satellite phone with prior art in high latitude area, the Monobrachial spiral passive antenna that adopts standard configuration with only have the technical scheme of broad beam antenna of the beamwidth of 120 degree to compare, it is that 1～6 times of single armed circular cone logarithm spiral unit and the fixture erection column of top width is coaxially arranged on circular fixed underpan that the present invention adopts two heel piece shapes, bottom width, it has good frequency bandwidth, directional diagram, gain coefficient, lower input impedance, the signal quality that receives or launch is high, particularly in high latitude area, uses.
2. the present invention also comprises that feed Ba Lun and impedance transformer are arranged on feeder line, and it can effectively improve the signal quality transmitting by feeder line, reduces input impedance.
The invention solves prior art when high latitude area use satellite phone, adopt the Monobrachial spiral passive antenna of standard configuration and only have the technical scheme of broad beam antenna of the beamwidth of 120 degree, because relative marine satellite is in visual angle, the low elevation angle, the impact of polarization, antenna gain is too low, a little less than reception signal, cause call completing rate low, the technical problem that cutting off rate is high, it has the beamwidth of 180 degree, good directional diagram, gain coefficient, lower input impedance, the signal quality that receives or launch is high, in use, the vertical installation of antenna can receive satellite-signal, do not need to adjust the marine use that antenna direction can adapt to high latitude area, obtained substantial progress, there is good practicality and industrial value.
Accompanying drawing explanation
In order to clearly demonstrate the present invention, adopt accompanying drawing to make an explanation to the present invention and embodiment below, and accompanying drawing is made to brief description.Accompanying drawing and accompanying drawing explanation are schematically, do not form concrete restriction of the present invention.Under inventive concept of the present invention is instructed, can also pass through accompanying drawing below, obtain other accompanying drawing.
Fig. 1 is structural representation of the present invention.
In figure, Reference numeral is expressed as: 1-fixture, 2-single armed circular cone logarithm spiral unit, 3-fixed underpan, 4-erection column, 5-feed Ba Lun, 6-impedance transformer.
Embodiment
Below in conjunction with Figure of description, the specific embodiment of the present invention is further illustrated.The explanation of these execution modes is mainly used in helping to understand inventive concept of the present invention, the technical problem solving, the technical characterictic that forms technical scheme and the technique effect bringing.To the explanation of these execution modes, be schematically, do not form concrete restriction of the present invention.The technical characterictic that each execution mode of the present invention is related, just can not combine mutually as long as do not form each other conflict, and by being equal to all embodiment alternative or that obviously variant obtains, and embodiments of the invention are identical in fact.
Embodiment mono-:
As shown in Figure 1, the present invention, comprise fixed underpan 3, erection column 4, fixture 1, two single armed circular cone logarithm spiral unit 2, one end of erection column 4 is arranged on fixed underpan 3 centers, the bottom of single armed circular cone logarithm spiral unit 2 is fixed on fixed underpan 3, and the top of single armed circular cone logarithm spiral unit 2 is fixed on other one end of erection column 4 by fixture 1.
When the present invention is come into operation, the first step checks, debug circuit: check whether fixed underpan 3, erection column 4, fixture 1, two single armed circular cone logarithm spiral unit 2 connect by technical scheme of the present invention, whether the hardware between them connects normal, if there is extremely, is corrected; Second step, adds electric test equipment: start power supply, confirm that whether the comprehensive reception antenna operating state of satellite phone is normal, just come into operation after normal; The 3rd step, carries out the comprehensive reception antenna of satellite phone and receives or the operation that transmits, and antenna is arranged on to outdoor appropriate location, and the comprehensive reception antenna of satellite phone is connected with satellite phone, and phone communicates business via satellite.
Those skilled in the art can freely select according to the requirement of practice of construction environment and workpiece the parameter of assembly.
Embodiment bis-:
In order to improve the signal of the comprehensive reception antenna of satellite phone, receive and emissivities, the present embodiment improves further on the basis of embodiment mono-, as shown in Figure 1, two of the present embodiment single armed circular cone logarithm spiral unit 2 are identical with the axis of erection column 4 and fixed underpan 3.
Embodiment tri-:
In order to improve the stress structure stability of the comprehensive reception antenna of satellite phone, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～bis-, and as shown in Figure 1, the fixed underpan 3 of the present embodiment is disk.
Embodiment tetra-:
In order to improve the comprehensive reception antenna signal of satellite phone, receive or emissivities, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～tri-, as shown in Figure 1, the single armed circular cone logarithm spiral unit 2 of the present embodiment is sheet logarithm spiral unit.
Embodiment five:
In order to improve that the low elevation angle of the comprehensive reception antenna of satellite phone receives or the ability that transmits, the present embodiment improves further on the basis of embodiment tetra-, as shown in Figure 1, the bottom width of the single armed circular cone logarithm spiral unit 2 of the present embodiment is 1～6 times of top width.
Embodiment six:
In order to improve the signal reception of the comprehensive reception antenna of satellite phone, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～five, as shown in Figure 1, the comprehensive reception antenna of satellite phone of the present embodiment, also comprise feed Ba Lun 5, feed Ba Lun 5 is arranged on erection column 4, and feed Ba Lun 5 is electrically connected to single armed circular cone logarithm spiral unit 2.
Embodiment seven:
In order to improve the conveying capacity of the comprehensive reception antenna of satellite phone to the satellite-signal receiving, the present embodiment embodiment six basis on improve further, as shown in Figure 1, the feed Ba Lun 5 of the present embodiment is the combination of any or they in magnet ring Ba Lun, cylinder Ba Lun.
Embodiment eight:
In order to improve the signal transmission quality of the comprehensive reception antenna of satellite phone, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～seven, as shown in Figure 1, the comprehensive reception antenna of satellite phone of the present embodiment, also comprise impedance transformer, impedance transformer is arranged on fixed underpan 3, and impedance transformer is electrically connected to feed Ba Lun 5.
Embodiment nine:
In order to improve the adaptive capacity to environment of the comprehensive reception antenna of satellite phone, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～eight, as shown in Figure 1, on the single armed circular cone logarithm spiral unit 2 of the present embodiment, is provided with big envelope.
Above combination Figure of description is made detailed description to embodiments of the present invention; but the present invention is not limited to the above-described embodiment and examples; on the basis based on inventive concept of the present invention; above-mentioned execution mode of the present invention is carried out to various variations, modification, replacement or modification, all fall into protection scope of the present invention.
Claims (9)
1. the comprehensive reception antenna of satellite phone, comprise fixed underpan (3), erection column (4), fixture (1), it is characterized in that, also comprise two single armed circular cone logarithm spiral unit (2), one end of described erection column (4) is arranged on fixed underpan (3) center, it is upper that the bottom of described single armed circular cone logarithm spiral unit (2) is fixed on fixed underpan (3), and the top of described single armed circular cone logarithm spiral unit (2) is fixed on other one end of erection column (4) by fixture (1).
2. the comprehensive reception antenna of satellite phone according to claim 1, is characterized in that, described two single armed circular cone logarithm spiral unit (2) are identical with the axis of erection column (4) and fixed underpan (3).
3. the comprehensive reception antenna of satellite phone according to claim 1, is characterized in that, described fixed underpan (3) is disk.
4. the comprehensive reception antenna of satellite phone according to claim 1, is characterized in that, described single armed circular cone logarithm spiral unit (2) is sheet logarithm spiral unit.
5. the comprehensive reception antenna of satellite phone according to claim 4, is characterized in that, the bottom width of described single armed circular cone logarithm spiral unit (2) is 1～6 times of top width.
6. the comprehensive reception antenna of satellite phone according to claim 1, it is characterized in that, also comprise feed Ba Lun (5), it is upper that described feed Ba Lun (5) is arranged on erection column (4), and described feed Ba Lun (5) is electrically connected to single armed circular cone logarithm spiral unit (2).
7. the comprehensive reception antenna of satellite phone according to claim 6, is characterized in that, described feed Ba Lun (5) is the combination of any or they in magnet ring Ba Lun, cylinder Ba Lun.
8. the comprehensive reception antenna of satellite phone according to claim 1, is characterized in that, also comprises impedance transformer, and it is upper that described impedance transformer is arranged on fixed underpan (3), and described impedance transformer is electrically connected to feed Ba Lun (5).
9. the comprehensive reception antenna of satellite phone according to claim 1, is characterized in that, on described single armed circular cone logarithm spiral unit (2), is provided with big envelope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310630003.9A CN103682558A (en) | 2013-11-30 | 2013-11-30 | Satellite phone omnidirectional receiving antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310630003.9A CN103682558A (en) | 2013-11-30 | 2013-11-30 | Satellite phone omnidirectional receiving antenna |
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| CN103682558A true CN103682558A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310630003.9A Pending CN103682558A (en) | 2013-11-30 | 2013-11-30 | Satellite phone omnidirectional receiving antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109216897A (en) * | 2018-10-24 | 2019-01-15 | 常熟正昊电子科技有限公司 | A kind of miniaturization Beidou navigation antenna suitable for hidden installation |
| US11555911B2 (en) | 2019-06-07 | 2023-01-17 | Honeywell International Inc. | Interference limiting for surveillance messages |
| US11869372B2 (en) | 2020-11-11 | 2024-01-09 | Honeywell International Inc. | Transmitting and receiving surveillance messages |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6538620B2 (en) * | 2001-07-09 | 2003-03-25 | Susan Lin | Safe sticker antenna for mobile phones |
| CN101394020A (en) * | 2008-11-13 | 2009-03-25 | 上海交通大学 | Ultra-wideband flat helical antenna having back chamber |
| CN103187618A (en) * | 2013-03-21 | 2013-07-03 | 西安电子科技大学 | Hollow dielectric spherical spiral antenna |
| CN103346385A (en) * | 2013-06-18 | 2013-10-09 | 哈尔滨工业大学 | Circular cone logarithm helical antenna with frustum |
| CN203589195U (en) * | 2013-11-30 | 2014-05-07 | 成都天奥信息科技有限公司 | Maritime satellite phone low-elevation antenna |
-
2013
- 2013-11-30 CN CN201310630003.9A patent/CN103682558A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6538620B2 (en) * | 2001-07-09 | 2003-03-25 | Susan Lin | Safe sticker antenna for mobile phones |
| CN101394020A (en) * | 2008-11-13 | 2009-03-25 | 上海交通大学 | Ultra-wideband flat helical antenna having back chamber |
| CN103187618A (en) * | 2013-03-21 | 2013-07-03 | 西安电子科技大学 | Hollow dielectric spherical spiral antenna |
| CN103346385A (en) * | 2013-06-18 | 2013-10-09 | 哈尔滨工业大学 | Circular cone logarithm helical antenna with frustum |
| CN203589195U (en) * | 2013-11-30 | 2014-05-07 | 成都天奥信息科技有限公司 | Maritime satellite phone low-elevation antenna |
Non-Patent Citations (2)
| Title |
|---|
| 杨增辉: "北斗卫星导航系统车载全向天线研究", 《南京航空航天大学硕士学位论文》, 1 March 2011 (2011-03-01), pages 8 - 33 * |
| 杨增辉: "北斗卫星导航系统车载全向天线研究", 《南京航空航天大学硕士学位论文》, 31 December 2010 (2010-12-31), pages 8 - 33 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109216897A (en) * | 2018-10-24 | 2019-01-15 | 常熟正昊电子科技有限公司 | A kind of miniaturization Beidou navigation antenna suitable for hidden installation |
| US11555911B2 (en) | 2019-06-07 | 2023-01-17 | Honeywell International Inc. | Interference limiting for surveillance messages |
| US12044771B2 (en) | 2019-06-07 | 2024-07-23 | Honeywell International Inc. | Interference limiting for surveillance messages |
| US11869372B2 (en) | 2020-11-11 | 2024-01-09 | Honeywell International Inc. | Transmitting and receiving surveillance messages |
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Application publication date: 20140326 |