CN2720658Y - Shunt-fed omnidirectional aerial array - Google Patents
Shunt-fed omnidirectional aerial array Download PDFInfo
- Publication number
- CN2720658Y CN2720658Y CN 200420078206 CN200420078206U CN2720658Y CN 2720658 Y CN2720658 Y CN 2720658Y CN 200420078206 CN200420078206 CN 200420078206 CN 200420078206 U CN200420078206 U CN 200420078206U CN 2720658 Y CN2720658 Y CN 2720658Y
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- little band
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- feed
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Abstract
The utility model relates to a shunt-fed omnidirectional aerial array which is used for working of broad band. A fed circuit is arranged in a circuit hollow subarray, and the input port of the fed circuit is connected with the input port of the aerial. The fed circuit is composed of a micro-band medium chip, a power distributor, micro-band short circuit line, and a micro-band ground plane, and the micro-band ground plane is arranged on the surface of the micro-band medium chip, the power distributor and the micro-band short circuit lines are arranged on the other surface of the micro-band medium chip, the micro-band terminal of the output port of the fed circuit is connected with one end of the micro-band short circuit line, the other end of the micro-band short circuit line is shortly connected with the micro-band ground plane, one balance output terminal of the output port of the fed circuit is connected with the terminal of the aerial which is arranged on the arm of the hollow subarray, the output port of the fed circuit is arranged in the micro-band ground plane, and another balanced output terminal which is at the corresponding position of the balanced output terminal is connected with an aerial fed terminal on the adjacent arm of another hollow subarray which is arranged at the position of the hollow subarray.
Description
Technical field
The utility model relates to a kind of broadband omni-directional antenna that is applied in fields such as mobile communication, radio and television, scouting and electronic countermeasures and radar, relates in particular to a kind of and the feedback omni-directional antenna arrays.
Background technology
Omnidirectional antenna commonly used now has conllinear coaxial antenna (comprising the microstrip structure antenna that is got by this antenna deformation), waveguide or coaxial line fluting array antenna, coaxial bipyramid and the various ways such as discone antenna and helical antenna of vertical monopole antenna, more piece half-wavelength coaxial transmission line intersection serial connection.Above-mentioned antenna differs from one another thereby in different occasions application is arranged all, but the antenna of every kind of form has shortcoming again, these weak points are mainly reflected on the leading indicator of antennas such as bandwidth of operation, gain, directional diagram the influence of antenna, make the application of every kind of antenna be subjected to bigger restriction.In these all omnidirectional antennas, the gain of vertical monopole antenna (comprise load vertical monopole) is lower usually and be mainly used in the antenna of working on lower frequency.Antenna, waveguide and the channels coaxial array antenna that multistage sleeve stub serial connection forms makes it improve gain along axis direction composition antenna array by increasing radiating element, this class antenna is extensive use of in fields such as mobile communication and radar beacon, because this class antenna array is subjected to the restriction of version, the overwhelming majority all is series feed, so bandwidth of operation is narrow.The sensing that a significant disadvantages of series feed antenna array is a wave beam is offset with the variation of frequency, operating frequency off-center frequency is many more, the wave beam skew is big more, the gain of antenna is high more, the wave beam skew is to using the influence that is caused big more, so this class antenna can not satisfy the requirement of broadband, high-gain application.Though bipyramid or discone antenna have bigger bandwidth of operation in these several omnidirectional antennas, it is lower to gain.Adopting the antenna array of parallelly feeding is the method preferably that addresses the above problem.Mode with parallelly feeding is the gain that a plurality of radiating element feeds can improve antenna array, can not cause the phenomenon of beam position with frequency change generation skew simultaneously, and the working band of shunt-fed antenna is general all wideer than the series fed antenna.The antenna of parallelly feeding can also be controlled the amplitude and the phase place of each radiating element as required easily in addition, realizes optimal design and control to the antenna array directional diagram, and these advantages are that series feed antenna is incomparable.Therefore, the array antenna of parallelly feeding has obtained to use widely.For directional antenna, the antenna of parallelly feeding is easier to realize that the billboard antenna that uses as the mobile communication base station all adopts the parallelly feeding technology.For single omni, realize that parallelly feeding then is difficult, main cause is that blocking of feeding network can't be eliminated, thereby forms zero point or recess on omnidirectional antenna azimuth plane directional diagram, has destroyed the omnidirectional radiation characteristic of omnidirectional antenna.
Summary of the invention
The utility model provide a kind of have do not have block, broadband character and present omni-directional antenna arrays.
The utility model adopts following technical scheme to solve its technical problem:
A kind of that be suitable for broadband operation and present omni-directional antenna arrays, at least comprise the hollow a period of time 1 more than two, be provided with antenna input port 3 in the bottom of antenna, be provided with feed circuit 4 in the inside in hollow a period of time 1, the input port 45 of feed circuit 4 is connected with antenna input port 3, feed circuit 4 is by little band dielectric substrate 41, power divider 42, little band short-circuit line 43 and little band ground level 44 are formed, little band ground level 44 is located on little band dielectric substrate 41 surfaces, power divider 42 and little band short-circuit line 43 are located on another surface of little band dielectric substrate 41, the output port 46 of feed circuit 4 is connected with an end of little band short-circuit line 43, the other end of little band short-circuit line 43 is connected with little band ground level 44 short circuits, balance lead-out terminal of above-mentioned feed circuit 4 output ports 46 is connected with the antenna feed terminal 11 on being located at hollow a period of time 1 arm, feed circuit 4 output ports 46 be positioned at little band ground level 44 and with corresponding another balance lead-out terminal of above-mentioned balance lead-out terminal be positioned at above-mentioned adjacent position of hollow a period of time 1 on the alternate arm in another hollow a period of time on antenna feed terminal 12 be connected.
Compared with prior art, the utlity model has following advantage:
1. the utility model is different with general omnidirectional antenna, and adopting the parallelly feeding network is the antenna array feed, has the frequency bandwidth characteristics of broad.As everyone knows, phase difference on each radiating element of series feed antenna is relevant with the electrical length in the path of signal transmission, and be difficult to control as required, the phase place on each radiating element can only meet design requirement on the center frequency points of antenna, thereby can only arrowband work.And the path that signal is transferred to each radiating element in the shunt excited antenna equates that the phase difference between the radiating element and the electrical length of transmission path have nothing to do.But the parallelly feeding technology is difficult to realize in single omni always.The utility model employing is small-sized, feeding network combines with the thick oscillator in broadband flexibly, utilize the short space of hollow thick oscillator inside, nothing on the inner realization of hollow thick oscillator orientation is blocked feed, overcome the recess of the azimuth plane antenna pattern that the parallelly feeding net causes because of network blocks or the shortcoming that can not in omnidirectional antenna, use zero point, solved a difficult problem the single omni parallelly feeding.
2. the utility model has been owing to realized parallelly feeding, thus overcome the shortcoming that series feed omnidirectional antenna frequency band is narrow, beam direction changes with frequency change, thereby the quantity that can increase radiating element obtains higher gain and stable antenna pattern.
3. adopt technical measures that the feed placement make adjacent one or a pair of oscillator alternately oppositely connects promptly:
Two output ports on two output ports of feed circuit and another feed circuit adjacent with this feed circuit circumferentially differ 180 ° or feed circuit in the antenna cross section adjacent output port circumferentially differs 180 ° in the antenna cross section, reduced the cross polarization of antenna.
4. feed circuit of the present utility model is integrated with the balanced-unbalanced transformer of print structure, volume is little because the balanced-unbalanced transformer of this structure has, flexible arrangement, compact conformation, can make feed circuit be built in the advantage of hollow oscillator inside thereby make the utlity model has.
5, the short-circuit line of microstrip structure can be provided with near feed circuit output (element antenna input) as required, make feed circuit just be transformed to balanced transmission line at the balanced feeding point place that must become balanced transmission line, outside distributing point, all can adopt the cable of unbalanced construction or little band to carry out power delivery on other whole transmission path, with promptly finish conversion because of the influence of balanced-unbalanced transformer volume and structural factor at the total input interface of antenna place, transmission path is compared with the balanced transmission line through-put power has less loss.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural front view of the utility model embodiment.
Fig. 3 is the structure vertical view of the utility model embodiment.
Fig. 4 is the structural representation of another embodiment of the utility model.
Fig. 5 is the partial structurtes enlarged diagram of another embodiment of the utility model, and wherein, what A indicated is stube cable.
Fig. 6 is a feed circuit structural representation of the present utility model.
Fig. 7 is a power divider structural representation of the present utility model.
Embodiment
That 1 one kinds of embodiment are suitable for broadband operation and present omni-directional antenna arrays, at least comprise the hollow a period of time 1 more than two, be provided with antenna input port 3 in the bottom of antenna, be provided with feed circuit 4 in the inside in hollow a period of time 1, the input port 45 of feed circuit 4 is connected with antenna input port 3, feed circuit 4 is by little band dielectric substrate 41, power divider 42, little band short-circuit line 43 and little band ground level 44 are formed, little band ground level 44 is located on little band dielectric substrate 41 surfaces, power divider 42 and little band short-circuit line 43 are located on another surface of little band dielectric substrate 41, little band edge of the output port 46 of feed circuit 4 is connected with an end of little band short-circuit line 43, the other end of little band short-circuit line 43 is connected with little band ground level 44 short circuits, balance lead-out terminal of above-mentioned feed circuit 4 output ports 46 is connected with the antenna feed terminal 11 on being located at hollow a period of time 1 arm, another balance lead-out terminal that is positioned at little band ground level 44 and is in opposite position with above-mentioned balance lead-out terminal of feed circuit 4 output ports 46 be positioned at above-mentioned adjacent position of hollow a period of time 1 on the alternate arm in another hollow a period of time on antenna feed terminal 12 be connected, in the present embodiment, the quantity in hollow a period of time 1 is 2, the quantity of feed circuit 4 is 1, feed circuit 4 is arranged on mutual neighbour and belongs to respectively in two arms in different hollow a period of time, be positioned at a hollow a period of time feed circuit 4 an output port two balance lead-out terminals respectively with two arms that are located at this hollow a period of time on antenna feed terminal 11,12 connect, be positioned at another hollow a period of time feed circuit 4 another output port two balance lead-out terminals respectively with two arms that are located at this another hollow a period of time on antenna feed terminal 11,12 connect, above-mentioned little band short-circuit line 43 is the little band short-circuit line of 1/4 wavelength, and two output ports on two output ports of above-mentioned feed circuit and another feed circuit adjacent with this feed circuit circumferentially differ 180 ° in the antenna cross section.
That 2 one kinds of embodiment are suitable for broadband operation and present omni-directional antenna arrays, at least comprise the hollow a period of time 1 more than two, be provided with antenna input port 3 in the bottom of antenna, be provided with feed circuit 4 in the inside in hollow a period of time 1, the input port 45 of feed circuit 4 is connected with antenna input port 3, feed circuit 4 is by little band dielectric substrate 41, power divider 42, little band short-circuit line 43 and little band ground level 44 are formed, little band ground level 44 is located on little band dielectric substrate 41 surfaces, power divider 42 and little band short-circuit line 43 are located on another surface of little band dielectric substrate 41, little band edge of the output port 46 of feed circuit 4 is connected with an end of little band short-circuit line 43, the other end of little band short-circuit line 43 is connected with little band ground level 44 short circuits, balance lead-out terminal of above-mentioned feed circuit 4 output ports 46 is connected with the antenna feed terminal 11 on being located at hollow a period of time 1 arm, another balance lead-out terminal that is positioned at little band ground level 44 and is in opposite position with above-mentioned balance lead-out terminal of feed circuit 4 output ports 46 be positioned at above-mentioned adjacent position of hollow a period of time 1 on the alternate arm in another hollow a period of time on antenna feed terminal 12 be connected.Present embodiment is provided with power divider 2 between antenna input port 3 and feed circuit 4, the input port 21 of power divider 2 is connected with antenna input port 3, two output ports 22 of power divider 2 are connected with the input port of adjacent two feed circuits 4 respectively, power divider 2 is between two adjacent feed circuits 4, present embodiment can also be provided with another power divider between the input port 21 of two adjacent power dividers 2 and antenna input port 3, the input port of this another power divider is connected with antenna input port 3, two output ports of this another power divider are connected with the input port 21 of two adjacent power dividers 2 respectively, the adjacent output port of above-mentioned feed circuit circumferentially differs 180 ° in the antenna cross section, in the present embodiment, the quantity in hollow a period of time 1 is 8, the quantity of feed circuit 4 is 4, power divider 2 is 3,4 feed circuits are arranged on mutual neighbour respectively and belong to respectively in two arms in adjacent hollow a period of time, two balance lead-out terminals on the output port of each feed circuit respectively with two arms that are located at each corresponding hollow a period of time of feed circuit on antenna feed terminal 11,12 connect (referring to Fig. 4).
Claims (7)
1, a kind of that be suitable for broadband operation and present omni-directional antenna arrays, at least comprise the hollow a period of time (1) more than two, be provided with antenna input port (3) in the bottom of antenna, it is characterized in that being provided with feed circuit (4) in the inside in hollow a period of time (1), the input port (45) of feed circuit (4) is connected with antenna input port (3), feed circuit (4) is by little band dielectric substrate (41), power divider (42), little band short-circuit line (43) and little band ground level (44) are formed, little band ground level (44) is located on little band dielectric substrate (41) surface, power divider (42) and little band short-circuit line (43) are located on another surface of little band dielectric substrate (41), little band edge of the output port (46) of feed circuit (4) is connected with an end of little band short-circuit line (43), the other end of little band short-circuit line (43) is connected with little band ground level (44) short circuit, balance lead-out terminal of above-mentioned feed circuit (4) output port (46) is connected with the antenna feed terminal (11) on being located at (1) arm of hollow a period of time, another balance lead-out terminal that is positioned at little band ground level (44) and is in opposite position with above-mentioned balance lead-out terminal of feed circuit (4) output port (46) be positioned at (1) adjacent position of above-mentioned hollow a period of time on the alternate arm in another hollow a period of time on antenna feed terminal (12) be connected.
2, according to claim 1 and feedback omni-directional antenna arrays, it is characterized in that between antenna input port (3) and feed circuit (4), being provided with power divider (2), the input port (21) of power divider (2) is connected with antenna input port (3), and two output ports (22) of power divider (2) are connected with the input port of adjacent two feed circuits (4) respectively.
3, according to claim 2 and feedback omni-directional antenna arrays is characterized in that power divider (2) is positioned between adjacent two feed circuits (4).
4, according to claim 2 or 3 described and feedback omni-directional antenna arrays, it is characterized in that between the input port (21) of two adjacent power dividers (2) and antenna input port (3), being provided with another power divider, the input port of this another power divider is connected with antenna input port (3), and two output ports of this another power divider are connected with the input port (21) of two adjacent power dividers (2) respectively.
5, according to claim 1 and feedback omni-directional antenna arrays is characterized in that little band short-circuit line (43) is the little band short-circuit line of 1/4 wavelength.
6, according to claim 1 and feedback omni-directional antenna arrays is characterized in that two output ports of feed circuit and two output ports on another feed circuit adjacent with this feed circuit circumferentially differ 180 ° in the antenna cross section.
7, according to claim 1 and feedback omni-directional antenna arrays is characterized in that the adjacent output port of feed circuit circumferentially differs 180 ° in the antenna cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420078206 CN2720658Y (en) | 2004-07-30 | 2004-07-30 | Shunt-fed omnidirectional aerial array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420078206 CN2720658Y (en) | 2004-07-30 | 2004-07-30 | Shunt-fed omnidirectional aerial array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2720658Y true CN2720658Y (en) | 2005-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420078206 Expired - Lifetime CN2720658Y (en) | 2004-07-30 | 2004-07-30 | Shunt-fed omnidirectional aerial array |
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| Country | Link |
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| CN (1) | CN2720658Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326287C (en) * | 2004-07-30 | 2007-07-11 | 东南大学 | Shunt-feed omnidirectional antenna array |
| CN102110897A (en) * | 2010-12-19 | 2011-06-29 | 西安海天天线科技股份有限公司 | Micro-strip omnidirectional antenna used for mobile communication |
| CN101369684B (en) * | 2008-09-19 | 2012-08-08 | 江苏安特耐科技有限公司 | Quaternionic notch antenna |
-
2004
- 2004-07-30 CN CN 200420078206 patent/CN2720658Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326287C (en) * | 2004-07-30 | 2007-07-11 | 东南大学 | Shunt-feed omnidirectional antenna array |
| CN101369684B (en) * | 2008-09-19 | 2012-08-08 | 江苏安特耐科技有限公司 | Quaternionic notch antenna |
| CN102110897A (en) * | 2010-12-19 | 2011-06-29 | 西安海天天线科技股份有限公司 | Micro-strip omnidirectional antenna used for mobile communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20040730 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |