CN106848541B - Antenna with a shield - Google Patents

Antenna with a shield Download PDF

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Publication number
CN106848541B
CN106848541B CN201510886156.9A CN201510886156A CN106848541B CN 106848541 B CN106848541 B CN 106848541B CN 201510886156 A CN201510886156 A CN 201510886156A CN 106848541 B CN106848541 B CN 106848541B
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sub
excitation unit
director
directors
length
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CN106848541A (en
Inventor
漆一宏
于伟
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GENERAL TEST SYSTEMS Inc.
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Leader Technology Hengqin Co ltd
Jiangsu East Century Network Information Co ltd
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Abstract

The invention discloses an antenna, comprising: a support; the excitation unit is arranged on the bracket and is of a closed curve shape so as to form a through groove; a director provided on the bracket, the director being located on a first side of the excitation unit and spaced apart from the excitation unit in a length direction of the bracket; a reflector disposed on the support, the reflector being located on a second side of the excitation unit and spaced apart from the excitation unit in a length direction of the support, the first side being opposite to the second side; and a feeder cable connected to the excitation unit. The antenna according to the embodiment of the invention has the advantage of wide frequency bandwidth, namely the antenna has wide frequency bandwidth.

Description

Antenna with a shield
Technical Field
The invention relates to the field of communication, in particular to an antenna.
Background
In the related art, the yagi antenna is an end-fire antenna composed of a dipole, a reflector, and one or more directors. The radiating range of the oscillator of the yagi antenna is small, and the bandwidth is limited, so that the yagi antenna cannot realize wider bandwidth.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides an antenna with the advantage of wide frequency bandwidth.
An antenna according to an embodiment of the present invention includes: a support; the excitation unit is arranged on the bracket and is of a closed curve shape so as to form a through groove; a director provided on the bracket, the director being located on a first side of the excitation unit and spaced apart from the excitation unit in a length direction of the bracket; a reflector disposed on the support, the reflector being located on a second side of the excitation unit and spaced apart from the excitation unit in a length direction of the support, the first side being opposite to the second side; and a feeder cable connected to the excitation unit.
The antenna according to the embodiment of the invention has the advantage of wide frequency bandwidth, namely the antenna has wide frequency bandwidth.
In addition, the antenna according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the excitation unit has a longitudinal symmetry axis, a transverse symmetry axis and a center, the through slot being symmetrical with respect to the longitudinal symmetry axis, symmetrical with respect to the transverse symmetry axis, symmetrical with respect to the center.
According to one embodiment of the invention, the director comprises a plurality of sub directors, which are arranged parallel to each other and spaced apart in the transverse direction of the excitation unit, wherein the extension direction of each of the sub directors coincides with the main polarization direction of the electric field of the excitation unit.
According to an embodiment of the present invention, a plurality of the sub-directors of the director are located on different vertical planes perpendicular to the length direction of the support, wherein one of the adjacent two of the sub-directors away from the middle portion of the director is closer to the excitation unit than one of the adjacent two of the sub-directors adjacent to the middle portion of the director.
According to one embodiment of the present invention, the director comprises an odd number of the sub directors, the odd number of the sub directors comprises a middle sub director and a plurality of side sub directors, the plurality of the side sub directors are symmetric to each other two by two with respect to the middle sub director, and two of the side sub directors symmetric to the middle sub director are located on the same vertical plane perpendicular to the length direction of the bracket.
According to an embodiment of the present invention, the plurality of the guides are provided at intervals along a length direction of the bracket, a length of each of the guides in the transverse direction is equal to or less than a length of the excitation unit in the transverse direction, and preferably, the bracket comprises a body, a plurality of first supporting arms, a first clamping piece and a second clamping piece, wherein the plurality of first supporting arms are arranged on the body at intervals along the length direction of the body, the plurality of directors are arranged on the plurality of first supporting arms in a one-to-one correspondence manner, wherein the body comprises an upper section and a lower section, the first clamping piece is sleeved on the lower end of the upper section, the second clamping piece is sleeved on the upper end of the lower section, the first clamping piece is connected with the second clamping piece, the middle part of the excitation unit is clamped between the first clamping piece and the second clamping piece.
According to one embodiment of the present invention, a length of one of the adjacent two of the directors away from the excitation unit in the lateral direction is less than or equal to a length of one of the adjacent two of the directors adjacent to the excitation unit in the lateral direction.
According to an embodiment of the present invention, a plurality of the directors constitute a far-director group distant from the excitation unit, a near-director group adjacent to the excitation unit, and a middle-director group located between the far-director group and the near-director group, wherein a length of each of the directors of the far-director group in the lateral direction and a length of each of the directors of the near-director group in the lateral direction are each smaller than a length of each of the directors of the middle-director group in the lateral direction.
According to one embodiment of the invention, the plurality of the directors are arranged at intervals along the length direction of the bracket, wherein one of the plurality of the directors is arranged at the end of the bracket far away from the excitation unit and comprises one sub-director.
According to an embodiment of the present invention, the reflector comprises a plurality of sub-reflectors, the plurality of sub-reflectors are arranged in parallel and spaced apart along a transverse direction of the excitation unit, wherein an extending direction of each of the sub-reflectors coincides with a main polarization direction of an electric field of the excitation unit, preferably, the director comprises a plurality of sub-directors, positions of the plurality of sub-directors of the director correspond to positions of the plurality of sub-reflectors of the reflector one to one, preferably, the bracket comprises a body, a second support arm, a first clamping member and a second clamping member, the reflector is arranged on the second support arm, wherein the body comprises an upper section and a lower section, the first clamping member is sleeved on a lower end of the upper section, the second clamping member is sleeved on an upper end of the lower section, and the first clamping member is connected with the second clamping member, the middle part of the excitation unit is clamped between the first clamping piece and the second clamping piece.
According to an embodiment of the present invention, a length of the reflector in the lateral direction is equal to or greater than a length of the excitation unit in the lateral direction, and a length of the reflector in a longitudinal direction of the excitation unit is greater than a length of the excitation unit in the longitudinal direction and a length of the director in the longitudinal direction.
According to an embodiment of the present invention, the plurality of sub-reflectors of the reflector are located on different vertical planes perpendicular to the length direction of the support, wherein one of adjacent two of the sub-reflectors, which is far from the middle of the reflector, is adjacent to the excitation unit than one of adjacent two of the sub-reflectors, which is adjacent to the middle of the reflector.
According to one embodiment of the invention, the reflector comprises an odd number of the sub-reflectors, the odd number of the sub-reflectors comprise a middle sub-reflector and a plurality of side sub-reflectors, the plurality of the side sub-reflectors are symmetrical with respect to the middle sub-reflector in pairs, and the two side sub-reflectors symmetrical with respect to the middle sub-reflector are positioned on the same vertical plane perpendicular to the length direction of the support.
According to an embodiment of the present invention, the excitation unit has a first feed point and a second feed point, the first feed point and the second feed point are located on a longitudinal symmetry axis of the excitation unit and located at two sides of the through slot, wherein an outer conductor of the feed cable is connected to the first feed point, and an inner conductor of the feed cable is connected to the second feed point.
According to an embodiment of the present invention, the antenna further includes a first straight element and a second straight element, one end of the first straight element is connected to the first feed point, and one end of the second straight element is connected to the second feed point.
Drawings
Fig. 1 is a schematic structural diagram of an antenna according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an antenna according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an antenna according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of an antenna according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an antenna according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of an antenna according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of an excitation unit of the antenna according to the embodiment of the present invention;
fig. 8 is a partial structural schematic diagram of an antenna according to an embodiment of the present invention.
Reference numerals:
an antenna 10,
Bracket 101, body 1011, upper section 10111, lower section 10112, first support arm 1012, first clamp 1013, second clamp 1014, second support arm 1015,
An excitation unit 102, a through slot 1021, a first feed point 1022, a second feed point 1023, a left side portion 1024, a left pinch portion 1025, an intermediate portion 1026, a front portion 10261, a rear portion 10262, a right pinch portion 1027, a right side portion 1028, a first end cap portion 1024, a second end cap portion 1024, a first end cap portion 1024, a second end cap portion 1025, a second end cap portion 1024, a third,
A director 103, a sub director 1031, a middle sub director 10311, a side director 10312, a far director group 103a, a near director group 103b, a middle director group 103c,
A reflector 104, a sub-reflector 1041, a middle sub-reflector 10411, a side sub-reflector 10412,
A power feeding cable 105,
A first linear vibrator 1061, a second linear vibrator 1062,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An antenna 10 according to an embodiment of the present invention is described below with reference to the drawings. As shown in fig. 1 to 8, an antenna 10 according to an embodiment of the present invention includes a support 101, an exciting unit 102, a director 103, a reflector 104, and a feeder cable 105.
The excitation unit 102 is provided on the bracket 101, and the excitation unit 102 is in a closed curve shape to form a through groove 1021. The director 103 is provided on the support 101, the director 103 being located on a first side of the excitation unit 102, the director 103 being spaced apart from the excitation unit 102 in a length direction of the support 101. A reflector 104 is provided on the support 101, the reflector 104 being located on a second side of the excitation unit 102, the reflector 104 being spaced apart from the excitation unit 102 in a length direction of the support 101. Wherein a first side of the excitation unit 102 is opposite to a second side of the excitation unit 102. The feeder cable 105 is connected to the excitation unit 102.
The excitation unit 102 of the antenna 10 according to the embodiment of the present invention has a closed curve shape so as to form the through slot 1021, that is, the excitation unit 102 has a slot-like structure, and the electric field of the excitation unit 102 is distributed throughout the through slot 1021. Therefore, the direction of the electric field of the excitation unit 102 does not coincide with the direction of the current of the excitation unit 102. The direction of the electric field of the excitation unit 102 is shown by arrow a in fig. 7, and the direction of the current of the excitation unit 102 is shown by arrow B in fig. 7.
Since the electric field of the excitation unit 102 is distributed in the entire through-slot 1021, the radiation range of the excitation unit 102 is large, and the bandwidth of the antenna 10 is expanded. The antenna 10 according to the embodiment of the present invention has an advantage of a wide frequency bandwidth, that is, the antenna 10 has a wide frequency bandwidth.
Advantageously, the antenna 10 according to an embodiment of the present invention is a yagi antenna.
As shown in fig. 1-8, an antenna 10 according to some embodiments of the present invention includes a support 101, an excitation unit 102, a director 103, a reflector 104, and a feeder cable 105.
The holder 101 includes a body 1011 and a plurality of first support arms 1012, and the plurality of first support arms 1012 are provided on the body 1011 at intervals in the longitudinal direction of the body 1011. Advantageously, as shown in fig. 2, the body 1011 is provided with a mounting through hole through which each first support arm 1012 passes and is mounted on the body 1011. The longitudinal direction of the body 1011 is aligned with the longitudinal direction of the holder 101. The bracket 101 may be made of a metal material or a non-metal material.
For convenience of explanation, the up-down direction (as indicated by arrow C) and the left-right direction (as indicated by arrow D) are indicated in fig. 3. As shown in fig. 3, the main body 1011 extends in the up-down direction, i.e., the longitudinal direction of the main body 1011 coincides with the up-down direction, and each first support arm 1012 extends in the left-right direction.
The excitation element 102 is the radiating element of the antenna 10. Advantageously, the entire excitation unit 102 is located on the same vertical plane perpendicular to the length direction of the support 101, i.e. the entire excitation unit 102 is located on the same horizontal plane.
As shown in fig. 7, in one embodiment of the present invention, the excitation unit 102 has a longitudinal symmetry axis L1, a transverse symmetry axis L2, and a center, the through slot 1021 is symmetrical with respect to the longitudinal symmetry axis L1, the through slot 1021 is symmetrical with respect to the transverse symmetry axis L2, and the through slot 1021 is symmetrical with respect to the center. In other words, the excitation cells 102 are symmetrical with respect to the longitudinal axis of symmetry L1, the excitation cells 102 are symmetrical with respect to the transverse axis of symmetry L2, and the excitation cells 102 are symmetrical with respect to the center.
Specifically, the excitation unit 102 includes a left side portion 1024, a left pinch portion 1025, an intermediate portion 1026, a right pinch portion 1027, and a right side portion 1028. The left edge of the left pinch portion 1025 is connected to the right edge of the left side portion 1024, and the right edge of the left pinch portion 1025 is connected to the left edge of the middle portion 1026. The left edge of the right necked portion 1027 is connected to the right edge of the intermediate portion 1026, and the right edge of the right necked portion 1027 is connected to the left edge of the right side portion 1028.
The width of the left constricting portion 1025 decreases from left to right, the width of the right constricting portion 1027 decreases from right to left, and the width of the left side portion 1024 and the width of the right side portion 1028 are both greater than the width of the intermediate portion 1026. Wherein the upper left corner and the lower left corner of the left side portion 1024 protrude outward to form two circular arc shaped (major arc) protruding portions, and the upper right corner and the lower right corner of the right side portion 1028 protrude outward to form two circular arc shaped (major arc) protruding portions.
That is, the exciting unit 102 includes a regular or irregular-shaped closed outer periphery, a regular or irregular-shaped closed inner periphery, and a metal portion defined by the outer periphery and the inner periphery. The excitation unit 102 comprises a groove-like structure located inside the excitation unit 102, the groove-like structure comprising a regular or irregular shaped edge, i.e. the inner circumference of the excitation unit 102.
Advantageously, the excitation unit 102 is formed by bending a metal rod or a metal wire integrally, and the excitation unit 102 may also be formed by punching a metal piece integrally.
In one example of the invention, the excitation unit 102 has a first feed point 1022 and a second feed point 1023, the outer conductor of the feeder cable 105 being connected to the first feed point 1022 and the inner conductor of the feeder cable 105 being connected to the second feed point 1023. The feeding mode can realize good matching of the broadband, meet the standing wave requirement, optimize the directional diagram and avoid exciting a current higher mode.
Advantageously, the first 1022 and second 1023 feedpoints are located on the longitudinal symmetry axis L1 of the excitation unit 102, the first 1022 and second 1023 feedpoints being located on either side of the through slot 1021. In other words, intermediate portion 1026 includes a front portion 10261 and a rear portion 10262, with first feed point 1022 disposed on front portion 10261 at a midpoint of front portion 10261, and second feed point 1023 disposed on rear portion 10262 at a midpoint of rear portion 10262. Therefore, better matching of the broadband can be realized, the standing wave requirement is further met, the directional diagram is further optimized, and the high-order mode of the exciting current is further avoided.
As shown in fig. 7, the antenna 10 further includes a first straight element 1061 and a second straight element 1062, wherein one end of the first straight element 1061 is connected to the first feed point 1022, and one end of the second straight element 1062 is connected to the second feed point 1023. The feeding cable 105 can thereby simultaneously feed the excitation unit 102, the first straight vibrator 1061, and the second straight vibrator 1062. By providing the first straight element 1061 and the second straight element 1062, not only can the bandwidth of the antenna 10 in the low frequency band be effectively expanded so as to improve the radiation performance of the antenna 10 in the low frequency band, but also the first straight element 1061 and the second straight element 1062 cooperate with the director 103 and the reflector 104 so as to improve the gain of the antenna 10.
Each of the first and second linear vibrators 1061 and 1062 may be a linear metal member (e.g., a metal rod) or a non-linear metal member.
As shown in fig. 2 and 8, the bracket 101 further includes a first clamping member 1013 and a second clamping member 1014, the body 1011 includes an upper section 10111 and a lower section 10112, the first clamping member 1013 is sleeved on the lower end of the upper section 10111, and the second clamping member 1014 is sleeved on the upper end of the lower section 10112. The first holder 1013 is connected to the second holder 1014 (for example, by a plurality of bolts), and the middle portion of the excitation unit 102, a part of the first straight vibrator 1061, and a part of the second straight vibrator 1062 are held between the first holder 1013 and the second holder 1014. Thereby making the antenna 10 more convenient to assemble.
Specifically, a part of intermediate portion 1026 of excitation unit 102, an end portion of first straight vibrator 1061 connected to excitation unit 102, and an end portion of second straight vibrator 1062 connected to excitation unit 102 are sandwiched between first holder 1013 and second holder 1014.
The director 103 is used for enhancing the electric wave emitted from the excitation unit 102 to the direction of the director 103. As shown in fig. 1 to 6, a plurality of directors 103 are parallel to each other, and each director 103 is parallel to the excitation unit 102.
As shown in fig. 1 to 6, the director 103 includes a plurality of sub directors 1031 (e.g., three or five), the plurality of sub directors 1031 being parallel to each other, the plurality of sub directors 1031 being disposed at intervals in the lateral direction of the excitation unit 102. Wherein the extension direction of each sub director 1031 coincides with the main polarization direction of the electric field of the excitation unit 102. Since the director 103 includes a plurality of sub directors 1031, the director 103 may be viewed as an array of the plurality of sub directors 1031.
Advantageously, a plurality of sub directors 1031 are provided at intervals in the left-right direction, each sub director 1031 extending in the main polarization direction of the electric field of the excitation unit 102, i.e., each sub director 1031 may extend in the front-rear direction. The lateral direction of the excitation unit 102 is shown by an arrow E in fig. 7, and the lateral direction of the excitation unit 102 may coincide with the left-right direction, and the front-back direction is shown by an arrow F in fig. 1.
In the related art, the position, direction, and shape of the director of the yagi antenna correspond to the position, direction, and shape of the element of the yagi antenna. Specifically, in the related art, the element of the yagi antenna is a straight element or a folded element, and the electric field direction of the element of the yagi antenna is consistent with the current direction. Meanwhile, the direction of the electric field of the director needs to be consistent with that of the oscillator so as to ensure the yagi antenna to work normally and meet the related technical requirements. In order to achieve the above purpose, the structure of the director of the yagi antenna is similar to that of the vibrator (for example, both are straight vibrators), and the director is parallel to the vibrator, so the arrangement mode of the director is limited.
The design idea of the application is as follows: the extension direction of the sub-directors 1031 coincides with the main polarization direction of the electric field of the excitation unit 102. This can greatly improve the technical index value such as the bandwidth of the antenna 10.
As shown in fig. 1 to 6, the plurality of guides 103 may be provided, and the plurality of guides 103 are provided at intervals along the length direction of the stent 101. Since the radiation range of the excitation unit 102 of the antenna 10 is large, a plurality of directors 103 may be provided on the first side of the excitation unit 102 (above the excitation unit 102), whereby the technical index values such as the frequency bandwidth and the gain of the antenna 10 may be further improved.
Specifically, the plurality of directors 103 are provided on the plurality of first support arms 1012 in one-to-one correspondence. The first support arm 1012 is provided with a plurality of mounting through holes through which the sub-directors 1031 of the directors 103 pass in a one-to-one correspondence. Wherein, when the director 103 includes an odd number of sub directors 1031, one sub director 1031 positioned in the middle also passes through the body 1011. In other words, when the director 103 includes an odd number of sub-directors 1031, the one sub-director 1031 located in the middle may also be considered to be mounted on both the first support arm 1012 and the body 1011.
As shown in fig. 1-3, 5 and 6, the plurality of sub-directors 1031 of the director 103 are located on the same vertical plane perpendicular to the length direction of the rack 101 (i.e., the body 1011), i.e., the plurality of sub-directors 1031 of the director 103 are located on the same horizontal plane.
Advantageously, as shown in fig. 4, the plurality of sub-directors 1031 of the director 103 are located on different vertical planes perpendicular to the length direction of the rack 101, i.e. the plurality of sub-directors 1031 of the director 103 are located on different horizontal planes. Wherein one of the adjacent two sub-directors 1031 far from the middle of the director 103 is adjacent to the exciting unit 102 than one of the adjacent two sub-directors 1031 near the middle of the director 103.
In other words, one of the far bodies 1011 of the adjacent two sub-directors 1031 is closer to the excitation unit 102 than one of the near bodies 1011 of the adjacent two sub-directors 1031, that is, one of the far bodies 1011 of the adjacent two sub-directors 1031 is located below one of the near bodies 1011 of the adjacent two sub-directors 1031. Thereby improving the performance of the antenna 10 in the high frequency band.
As shown in fig. 1 to 6, the director 103 includes an odd number of sub directors 1031, the odd number of sub directors 1031 includes a middle sub director 10311 and a plurality of side sub directors 10312, the plurality of side sub directors 10312 are symmetric two by two with respect to the middle sub director 10311, and two side sub directors 10312 symmetric with respect to the middle sub director 10311 are located on the same vertical plane perpendicular to the length direction of the rack 101, that is, two side sub directors 10312 symmetric with respect to the middle sub director 10311 are located on the same horizontal plane. The structure of the antenna 10 can thereby be made more rational.
The length of each guide 103 in the lateral direction of the excitation unit 102 is equal to or less than the length of the excitation unit 102 in the lateral direction thereof. As shown in fig. 1 to 4, in one example of the present invention, a length of one of the adjacent two directors 103 far from the excitation unit 102 in the lateral direction of the excitation unit 102 is smaller than a length of one of the adjacent excitation units 102 of the adjacent two directors 103 in the lateral direction of the excitation unit 102. In other words, the length of the plurality of directors 103 in the lateral direction of the excitation unit 102 decreases in the direction away from the excitation unit 102.
Here, the length of each director 103 in the lateral direction of the excitation unit 102 refers to the distance of the two sub directors 1031 of each director 103 located at the outermost side in the lateral direction of the excitation unit 102.
In the related art, a plurality of sequentially arranged directors are arranged on one side of a vibrator of the yagi antenna to increase the gain of the antenna, but actually, after the yagi antenna exceeds four or five directors, the effect of increasing the gain of the antenna is not obvious, and the problems of large volume, self weight increase, requirement on material strength increase, cost increase and the like of the antenna caused by the increase of the directors are gradually highlighted.
In order to solve the above problem, the antenna 10 according to the embodiment of the present invention may form an array structure of the directors 103 that are narrowed and gathered from the excitation unit 102 to one end of the antenna 10 by making the lengths of the plurality of directors 103 in the lateral direction of the excitation unit 102 decrease in the direction away from the excitation unit 102. Thus, the plurality of directors 103 (i.e., the director 103 array structure) can perform a wave focusing function, and the gain of the antenna 10 is greatly improved.
Those skilled in the art will appreciate that the shape, number, size, position, spacing between two adjacent sub directors 1031 and spacing between two adjacent directors 103 of the sub directors 1031 provided for each director 103 may be adjusted according to the index requirements of the antenna 10 to achieve the optimal performance.
As shown in fig. 5, in another example of the present invention, lengths of the plurality of directors 103 in the lateral direction of the excitation unit 102 are equal to each other.
In still another example of the present invention, as shown in fig. 6, the plurality of directors 103 constitute a far director group 103a distant from the excitation unit 102, a near director group 103b adjacent to the excitation unit 102, and a middle director group 103c located between the far director group 103a and the near director group 103 b. Wherein the length of each director 103 of the far director group 103a in the lateral direction of the excitation unit 102 and the length of each director 103 of the near director group 103b in the lateral direction of the excitation unit 102 are both smaller than the length of each director 103 of the middle director group 103c in the lateral direction of the excitation unit 102.
Advantageously, as shown in fig. 6, the lengths of each of the directors 103 of the far director group 103a in the lateral direction of the excitation unit 102 are equal to each other, the lengths of each of the directors 103 of the near director group 103b in the lateral direction of the excitation unit 102 are equal to each other, and the lengths of each of the directors 103 of the middle director group 103c in the lateral direction of the excitation unit 102 are equal to each other.
As shown in fig. 1 to 6, one of the plurality of directors 103 is provided at the end of the body 1011 away from the excitation unit 102, and the director 103 includes one sub director 1031. That is, a separate sub-director 1031 is provided at the upper end of the body 1011. Thereby, the gain of the antenna 10 can be further improved.
The reflector 104 is used to attenuate the electric wave emitted by the excitation unit 102 in the direction of the reflector 104. The reflector 104 may be a known reflector such as a metal plate, a metal rod, or the like.
As shown in fig. 1-6, in some examples of the invention, the reflector 104 includes a plurality of sub-reflectors 1041 (i.e., branches), the plurality of sub-reflectors 1041 being parallel to each other, the plurality of sub-reflectors 1041 being disposed at intervals along a lateral direction of the excitation unit 102. Wherein the extending direction of each sub-reflector 1041 is consistent with the main polarization direction of the electric field of the excitation unit 102. Since the reflector 104 includes a plurality of sub-reflectors 1041, the reflector 104 may be regarded as an array of the plurality of sub-reflectors 1041.
Advantageously, a plurality of sub-reflectors 1041 are provided at intervals in the left-right direction, and each sub-reflector 1041 extends in the main polarization direction of the electric field of the excitation unit 102, that is, each sub-reflector 1041 may extend in the front-rear direction.
By making the extending direction of each sub-reflector 1041 coincide with the main polarization direction of the electric field of the excitation unit 102, the electric wave emitted from the excitation unit 102 toward the reflector 104 can be more effectively attenuated, and the energy of the antenna 10 can be better enhanced toward the director 103 side.
The positions of the plurality of sub directors 1031 of the director 103 correspond one-to-one to the positions of the plurality of sub reflectors 1041 of the reflector 104. In other words, the number of the plurality of sub directors 1031 of the director 103 is equal to the number of the plurality of sub reflectors 1041 of the reflector 104, and the position of one sub director 1031 corresponds to the position of one sub reflector 1041.
This can further improve the technical index value such as the bandwidth of the antenna 10.
In a specific example of the present invention, the length of the reflector 104 in the lateral direction of the excitation unit 102 is equal to or greater than the length of the excitation unit 102 in the lateral direction thereof, and the length of the reflector 104 in the longitudinal direction of the excitation unit 102 is greater than the length of the excitation unit 102 in the longitudinal direction thereof and the length of the director 103 in the longitudinal direction of the excitation unit 102. The longitudinal direction of the exciting unit 102 is shown by an arrow G in fig. 7, and the longitudinal direction of the exciting unit 102 may coincide with the front-rear direction.
Here, the length of each reflector 104 in the lateral direction of the excitation unit 102 refers to the distance between the two outermost sub-reflectors 1041 of each reflector 104 in the lateral direction of the excitation unit 102. The length of the reflector 104 in the longitudinal direction of the excitation unit 102 refers to the length of the sub-reflector 1041 of the reflector 104 which is longest in the longitudinal direction of the excitation unit 102.
As shown in fig. 1 and 2, the support 101 further includes a second support arm 1015, and the plurality of sub-reflectors 1041 of the reflector 104 are provided on the second support arm 1015. Specifically, the second support arm 1015 is provided with a plurality of mounting through holes, and the sub-reflectors 1041 of the reflector 104 pass through the mounting through holes in a one-to-one correspondence. When the reflector 104 includes an odd number of sub-reflectors 1041, the middle sub-reflector 1041 also passes through the body 1011. In other words, when the reflector 104 includes an odd number of sub-reflectors 1041, the middle one of the sub-reflectors 1041 may also be considered to be mounted on both the second support arm 1015 and the body 1011.
As shown in fig. 1-3, 5 and 6, the plurality of sub-reflectors 1041 of the reflector 104 are located on the same vertical plane perpendicular to the length direction of the support 101 (i.e., the body 1011), that is, the plurality of sub-reflectors 1041 of the reflector 104 are located on the same horizontal plane.
As shown in fig. 4, the plurality of sub-reflectors 1041 of the reflector 104 are located on different vertical planes perpendicular to the length direction of the support 101, that is, the plurality of sub-reflectors 1041 of the reflector 104 are located on different horizontal planes. Wherein one of the adjacent two sub-reflectors 1041 away from the middle of the reflector 104 is adjacent to the excitation unit 102 than one of the adjacent two sub-reflectors 1041 adjacent to the middle of the reflector 104.
In other words, one of the adjacent two sub-reflectors 1041 far from the body 1011 is closer to the excitation unit 102 than one of the adjacent two sub-reflectors 1041 near the body 1011, that is, one of the adjacent two sub-reflectors 1041 far from the body 1011 is located above one of the adjacent two sub-reflectors 1041 near the body 1011. Thereby improving the performance of the antenna 10 in the high frequency band.
As shown in fig. 1 to 6, the reflector 104 includes odd-numbered sub-reflectors 1041, the odd-numbered sub-reflectors 1041 include a middle sub-reflector 10411 and a plurality of side sub-reflectors 10412, the plurality of side sub-reflectors 10412 are symmetric with respect to the middle sub-reflector 10411 in pairs, and two side sub-reflectors 10412 symmetric with respect to the middle sub-reflector 10411 are located on the same vertical plane perpendicular to the length direction of the support 101, that is, two side sub-reflectors 10412 symmetric with respect to the middle sub-reflector 10411 are located on the same horizontal plane. The structure of the antenna 10 can thereby be made more rational.
Those skilled in the art will appreciate that the shape, number, size, position, and spacing between adjacent sub-reflectors 1041 of the reflector 104 may be adjusted to achieve optimal performance according to the performance requirements of the antenna 10.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (17)

1. An antenna, comprising:
a support;
the excitation unit is arranged on the bracket and is of a closed curve shape so as to form a through groove;
a director provided on the bracket, the director being located on a first side of the excitation unit and spaced apart from the excitation unit in a length direction of the bracket;
a reflector disposed on the support, the reflector being located on a second side of the excitation unit and spaced apart from the excitation unit in a length direction of the support, the first side being opposite to the second side; and
a feeder cable connected to the excitation unit,
the guider comprises a plurality of sub-guiders, the plurality of sub-guiders of the guider are positioned on different vertical planes perpendicular to the length direction of the support, wherein one of the adjacent two sub-guiders far away from the middle part of the guider is adjacent to the excitation unit than one of the adjacent two sub-guiders adjacent to the middle part of the guider.
2. The antenna of claim 1,
the excitation unit has a longitudinal axis of symmetry, a transverse axis of symmetry and a center, the through slot being symmetrical with respect to the longitudinal axis of symmetry, symmetrical with respect to the transverse axis of symmetry, symmetrical with respect to the center.
3. The antenna of claim 1, wherein a plurality of said sub-directors are arranged parallel to each other and spaced apart in a lateral direction of said excitation unit, wherein an extending direction of each of said sub-directors coincides with a main polarization direction of an electric field of said excitation unit.
4. The antenna of claim 1, wherein the director comprises an odd number of the sub directors, the odd number of the sub directors comprises a middle sub director and a plurality of side sub directors, the plurality of the side sub directors are symmetric two by two with respect to the middle sub director, and wherein two of the side sub directors symmetric with respect to the middle sub director are located on the same vertical plane perpendicular to the length direction of the support.
5. The antenna of claim 1, wherein the director is a plurality of directors, the plurality of directors are arranged at intervals along the length direction of the bracket, and the length of each director in the transverse direction is less than or equal to the length of the excitation unit in the transverse direction.
6. The antenna of claim 1, wherein the bracket comprises a body, a plurality of first supporting arms, a plurality of first clamping members and a plurality of second clamping members, the plurality of first supporting arms are arranged on the body at intervals along the length direction of the body, the plurality of directors are arranged on the plurality of first supporting arms in a one-to-one correspondence, wherein the body comprises an upper section and a lower section, the first clamping members are sleeved on the lower end of the upper section, the second clamping members are sleeved on the upper end of the lower section, the first clamping members are connected with the second clamping members, and the middle part of the excitation unit is clamped between the first clamping members and the second clamping members.
7. The antenna of claim 1, wherein a length of one of two adjacent directors away from the excitation unit in the lateral direction is less than or equal to a length of one of two adjacent directors adjacent to the excitation unit in the lateral direction.
8. The antenna of claim 1, wherein a plurality of the directors constitute a far director group distant from the excitation unit, a near director group adjacent to the excitation unit, and a middle director group located between the far director group and the near director group, wherein a length of each of the directors of the far director group in the lateral direction and a length of each of the directors of the near director group in the lateral direction are each smaller than a length of each of the directors of the middle director group in the lateral direction.
9. The antenna of claim 1, wherein the director is a plurality of directors, the plurality of directors being spaced apart along the length of the support, wherein one of the plurality of directors is disposed at an end of the support remote from the excitation unit and includes one sub director.
10. An antenna according to claim 1, wherein said reflector comprises a plurality of sub-reflectors arranged parallel to each other and spaced apart in a transverse direction of said excitation unit, wherein each of said sub-reflectors extends in a direction coinciding with a main polarization direction of an electric field of said excitation unit.
11. The antenna of claim 10, wherein the director comprises a plurality of sub directors, and wherein the positions of the plurality of sub directors of the director correspond one-to-one to the positions of the plurality of sub reflectors of the reflector.
12. The antenna of claim 1, wherein the bracket comprises a body, a second support arm, a first clip, and a second clip, the reflector being disposed on the second support arm, wherein the body comprises an upper section and a lower section, the first clip being fitted over a lower end of the upper section, the second clip being fitted over an upper end of the lower section, the first clip being connected to the second clip, and a middle portion of the excitation unit being sandwiched between the first clip and the second clip.
13. The antenna according to any one of claims 1 to 12, wherein a length of the reflector in a lateral direction is equal to or greater than a length of the excitation unit in the lateral direction, and a length of the reflector in a longitudinal direction of the excitation unit is greater than a length of the excitation unit in the longitudinal direction and a length of the director in the longitudinal direction.
14. The antenna of claim 10, wherein a plurality of said sub-reflectors of said reflector are located on different vertical planes perpendicular to the length direction of said support, wherein one of adjacent two of said sub-reflectors farther from the middle of said reflector is closer to said excitation unit than one of adjacent two of said sub-reflectors which is closer to the middle of said reflector.
15. The antenna of claim 10, wherein the reflector comprises an odd number of the sub-reflectors, the odd number of the sub-reflectors comprises a middle sub-reflector and a plurality of side sub-reflectors, the plurality of side sub-reflectors are symmetric with respect to the middle sub-reflector in pairs, and two of the side sub-reflectors symmetric with respect to the middle sub-reflector are located on a same vertical plane perpendicular to the length direction of the bracket.
16. The antenna of claim 1, wherein the excitation element has a first feed point and a second feed point, the first feed point and the second feed point being located on a longitudinal symmetry axis of the excitation element and located on both sides of the through slot, wherein an outer conductor of the feed cable is connected to the first feed point, and an inner conductor of the feed cable is connected to the second feed point.
17. The antenna of claim 16, further comprising a first straight element and a second straight element, wherein one end of the first straight element is connected to the first feed point and one end of the second straight element is connected to the second feed point.
CN201510886156.9A 2015-12-04 2015-12-04 Antenna with a shield Active CN106848541B (en)

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CN108767420B (en) * 2018-06-23 2020-06-02 黄海英 Wall-mounted outdoor antenna with protective device

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CN201845868U (en) * 2010-10-18 2011-05-25 广东通宇通讯设备有限公司 Dual polarization Yagi-Uda antenna device
CN203205545U (en) * 2013-03-28 2013-09-18 东莞市普尔信通讯器材有限公司 Yagi aerial
JP5432055B2 (en) * 2010-05-11 2014-03-05 日本放送協会 Dual-polarization Yagi antenna
KR20140096655A (en) * 2013-01-28 2014-08-06 염두성 Antenna
JP2015186093A (en) * 2014-03-25 2015-10-22 日本放送協会 Yagi antenna

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JP5432055B2 (en) * 2010-05-11 2014-03-05 日本放送協会 Dual-polarization Yagi antenna
CN201845868U (en) * 2010-10-18 2011-05-25 广东通宇通讯设备有限公司 Dual polarization Yagi-Uda antenna device
KR20140096655A (en) * 2013-01-28 2014-08-06 염두성 Antenna
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