CN102025029A - Antenna - Google Patents
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- CN102025029A CN102025029A CN2010101885288A CN201010188528A CN102025029A CN 102025029 A CN102025029 A CN 102025029A CN 2010101885288 A CN2010101885288 A CN 2010101885288A CN 201010188528 A CN201010188528 A CN 201010188528A CN 102025029 A CN102025029 A CN 102025029A
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Abstract
The invention provides an antenna, wherein the antenna (102) is provided with a first conductor plate (11B), a second conductor plate (23) and a third conductor plate (24). The first conductor plate (11B) is provided with a first side (51) and a second side (52), wherein the first side (51) and the second side (52) extend along a length direction and are opposite to each other, and a third side (53) and a fourth side (54), wherein the third side (53) and the fourth side (54) extend along a width direction which is approximately orthogonal to the length direction and are opposite to each other. A slit (21) extending along the length direction is formed at the position where the first side (51), the second side (52), the third side (53) and the fourth side (54) are separated; a feed part is arranged on the first conductor plate (11B); and the second conductor plate (23) and the third conductor plate (24) respectively project from the first side (51) and the second side (52) within a partial range of the length direction of the slit (21).
Description
Technical field
The present invention relates to a kind of antenna, particularly relate to a kind of slot antenna.
Background technology
Be provided with under the situation of Yagi spark gap formula antenna in the past on the roof, might causing house setting variation and when antenna is set, damage the roof.Therefore, seek the antenna simple in structure that planar antenna etc. is considered setting better.
As planar antenna in the past, for example list dicyclo type antenna.Yet, in dicyclo type antenna, a plurality of dicyclo type emitters need be set, therefore the shortcoming that exists feed method and structure to become complicated in order to improve gain.
On the other hand, as planar antenna, list slot antenna.General slot antenna for example is provided with slit in the centre of rectangular planar conductor, is the hole of finedraw shape, at this slit of clamping and feed (with reference to non-patent literature 1 (electronic information communication association, " ア Application テ Na engineering Ha Application De Block Star Network (the 2nd edition), ohm company)) is carried out in two relative positions.In slot antenna, only current feed department is set and gets final product a position, therefore compare with dicyclo type antenna, can make feed method and structure become simple.
As an example of slot antenna, for example in patent documentation 1 (TOHKEMY 2002-84130 communique) following antenna is disclosed.Promptly, (Ultra HighFrequency: hyperfrequency) antenna is made of radiation conductor and reflection conductor UHF, and this radiation conductor constitutes the electric wave emitting surface for roughly tetragonal, this reflection conductor has the shape roughly the same with this radiation conductor, is configured to parallel with the back of radiating conductor.Above-mentioned radiation conductor has the openning that direction is up and down extended at central portion, is provided with distributing point in the left and right sides wall portion of the central part of this openning.
In addition, in patent documentation 2 (TOHKEMY 2003-332834 communique) following antenna is disclosed.Promptly, this antenna possesses conductive plate, horizontal polarized wave antenna and the vertically polarized wave antenna that the cross section is " コ " word shape, this conductive plate bend to by front plate with in the front plate both sides with this front plate roughly the side plate of quadrature constitute, this horizontal polarized wave is made of the slit that an edge part from the above-mentioned front plate of this conductive plate forms in an approximate vertical direction with antenna, this vertically polarized wave with antenna by in above-mentioned front plate be formed on the slit that the side plate upper edge general horizontal direction of these front plate both sides forms and constitute.
In recent years,, compare, can utilize antenna relatively simple for structure receiving television broadcasting well, therefore studying and using aforesaid slot antenna with analog broadcasting owing to begin to carry out digital terrestrial broadcasting.
Yet the frequency band of general slot antenna is narrow, and the whole UHF broadcast band that is difficult in Japan (all obtains good characteristic in 470～770MHz).As the method for this narrow-band of improving slot antenna, consider the length that prolongs the prolonging direction of slit on the conductor plate of slot antenna constituting.Yet,, produce the problem that antenna maximizes and can't hold antenna in desired resin-case if prolong the length of the prolonging direction of slit.
In the structure that patent documentation 2 is put down in writing, adopted the method for the length of the prolonging direction that prolongs slit on the conductor plate that is constituting slot antenna, but owing to the part that is provided with slit is bent, so the problem that exists mechanical strength to die down.
Summary of the invention
The present invention finishes in order to solve above-mentioned problem, and its purpose is to provide a kind of can realize slimming, prevent that mechanical strength from reducing and obtaining the antenna of superperformance.
In order to solve above-mentioned problem, the related antenna in certain side of the present invention possesses first conductor plate, second conductor plate and the 3rd conductor plate.First conductor plate has first limit, second limit, the 3rd limit and the 4th limit.First limit is extended with the second edge length direction and is relative mutually.The 3rd limit is extended with the Width of above-mentioned length direction quadrature with the 4th edge and is relative mutually.Slit is formed on first conductor plate.Slit extends along above-mentioned length direction, with above-mentioned first limit, above-mentioned second limit, above-mentioned the 3rd limit and above-mentioned the 4th limit partition distance be formed on first conductor plate.Current feed department is arranged on first conductor plate.Second conductor plate and the 3rd conductor plate are outstanding from above-mentioned first limit and above-mentioned second limit respectively in a part of scope of the length direction of above-mentioned slit.
Comparatively it is desirable to, above-mentioned second conductor plate and above-mentioned the 3rd conductor plate are outstanding from above-mentioned first limit and above-mentioned second limit bendingly respectively.
Even more ideal is that above-mentioned second conductor plate and above-mentioned the 3rd conductor plate are outstanding from above-mentioned first limit and above-mentioned second limit in the mode that the same main surface side to above-mentioned first conductor plate bends.
Comparatively it is desirable to, above-mentioned second conductor plate and above-mentioned the 3rd conductor plate are given prominence to from the central portion on above-mentioned first limit and the central portion on above-mentioned second limit respectively.
Comparatively it is desirable to, above-mentioned antenna also possesses: the 4th conductor plate, and it is from above-mentioned the 3rd limit bending; And the 5th conductor plate, it is from above-mentioned the 4th limit bending.
Comparatively it is desirable to, above-mentioned antenna also possesses the 6th conductor plate and the 7th conductor plate that bends respectively from above-mentioned first limit and above-mentioned second limit.The end that above-mentioned second conductor plate is relative from the end with above-mentioned first avris of above-mentioned the 6th conductor plate is outstanding.The end that above-mentioned the 3rd conductor plate is relative from the end with above-mentioned second avris of above-mentioned the 7th conductor plate is outstanding.
Comparatively it is desirable to, above-mentioned antenna also possesses and the relative reflector of above-mentioned first conductor plate.
The related antenna in another side of the present invention has first conductor plate, second conductor plate and the 3rd conductor plate, above-mentioned first conductor plate has extension along its length and the first relative mutually limit is extended also relative the 3rd limit and the 4th limit mutually with second limit and edge with the Width of above-mentioned length direction quadrature, on this first conductor plate, along above-mentioned length direction extend and with above-mentioned first limit, above-mentioned second limit, above-mentioned the 3rd limit and partition distance ground, above-mentioned the 4th limit form slit, and be provided with current feed department, above-mentioned second conductor plate is from above-mentioned the 3rd limit bending, and above-mentioned the 3rd conductor plate is from above-mentioned the 4th limit bending.
Comparatively it is desirable to, above-mentioned antenna also possesses and the relative reflector of above-mentioned first conductor plate.
According to the present invention, can realize the slimming of antenna and prevent that mechanical strength from reducing, and can access good characteristic.
According to accompanying drawing be associated understand with the present invention relevant following detailed description, can clear and definite above-mentioned and other purpose, feature, side and advantage of the present invention.
Description of drawings
Fig. 1 is the stereogram of the related antenna structure of expression first execution mode of the present invention.
Fig. 2 is the front view of the related antenna structure of expression first execution mode of the present invention.
(a) of Fig. 3 is the vertical view of the structure of the related emitter that antenna comprised of expression first execution mode of the present invention.(b) of Fig. 3 is the front view of the structure of the related emitter that antenna comprised of expression first execution mode of the present invention.(c) of Fig. 3 is the end view of the structure of the related emitter that antenna comprised of expression first execution mode of the present invention.
Fig. 4 is the curve chart of the relation between the frequency of related antenna gain of expression first execution mode of the present invention and received signal.
Fig. 5 is the stereogram of the related antenna structure of expression second execution mode of the present invention.
Fig. 6 is the front view of the related antenna structure of expression second execution mode of the present invention.
(a) of Fig. 7 is the vertical view of the structure of the related emitter that antenna comprised of expression second execution mode of the present invention.(b) of Fig. 7 is the front view of the structure of the related emitter that antenna comprised of expression second execution mode of the present invention.(c) of Fig. 7 is the end view of the structure of the related emitter that antenna comprised of expression second execution mode of the present invention.
Fig. 8 is the curve chart of the relation between the frequency of related antenna gain of expression second execution mode of the present invention and received signal.
Fig. 9 is the stereogram of the related antenna structure of expression the 3rd execution mode of the present invention.
Figure 10 is the front view of the related antenna structure of expression the 3rd execution mode of the present invention.
(a) of Figure 11 is the vertical view of the structure of the related emitter that antenna comprised of expression the 3rd execution mode of the present invention.(b) of Figure 11 is the front view of the structure of the related emitter that antenna comprised of expression the 3rd execution mode of the present invention.(c) of Figure 11 is the end view of the structure of the related emitter that antenna comprised of expression the 3rd execution mode of the present invention.
Figure 12 is the curve chart of the relation between the frequency of related antenna gain of expression the 3rd execution mode of the present invention and received signal.
Embodiment
Below, use accompanying drawing that embodiments of the present invention are described.In addition, to identical among the figure or the additional same tag of considerable part, do not repeat its explanation.
＜the first execution mode 〉
Fig. 1 is the stereogram of the related antenna structure of expression first execution mode of the present invention.Fig. 2 is the front view of the related antenna structure of expression first execution mode of the present invention.
(a) of Fig. 3 is the vertical view of the structure of the related emitter that antenna comprised of expression first execution mode of the present invention.(b) of Fig. 3 is the front view of the structure of the related emitter that antenna comprised of expression first execution mode of the present invention.(c) of Fig. 3 is the end view of the structure of the related emitter that antenna comprised of expression first execution mode of the present invention.
With reference to Fig. 1～Fig. 3, antenna 101 possesses emitter 11A and reflector 12.Emitter 11A comprises conductor plate 27,28,29.
On conductor plate 29, be formed with the slit 21 that extends along its length.Slit 21 is formed on the inboard on limit 51, limit 52, limit 53 and limit 54.That is, slit 21 forms and limit 51, limit 52, limit 53 and limit 54 partition distance.In other words, slit 21 has first end and the second end between limit 53 and limit 54, extends along its length between first end and the second end.
Be provided with slit 21 along in the longitudinal direction conductor plate 29 being divided into two-part straight line.That is, the straight line along the mid point on the mid point of fillet 53 and limit 54 is provided with slit 21.In addition, slit 21 is rectangular shapes, has the wide portion of broad ways expansion at for example its central portion.In addition, slit 21 also can be the structure with wide portion.This wide of broad ways clamping and relative position is provided with two distributing points, be current feed department 22.Be connected with not shown coaxial cable by not shown capacitor and balanced-to-unbalanced transformer at current feed department 22 places.
As depicted in figs. 1 and 2, reflector 12 is arranged on the position relative with conductor plate 29, and the both sides of extending are by to emitter 11A lateral buckling along its length.By this structure, can shorten reflector 12 width, be the length of directions X, therefore can realize the miniaturization of antenna 101.
Shown in Fig. 3 (a), the length of the Width of plane conductor 29 is about λ/2, and the length of the length direction of plane conductor 29 is about λ.Wherein, λ is the corresponding wavelength of centre frequency of the signal band that will receive with antenna 101, for example is the wavelength of the signal of 620MHz.
By this structure, can as shown in Figure 2 the distance between conductor plate 29 and the reflector 12 be shortened to λ/10 and the slimming of realization antenna 101.Usually, in order to obtain good characteristic, the distance setting between conductor plate and the reflector need be λ/4 roughly.Yet, in antenna 101, also can access good characteristic even the distance between conductor plate and the reflector is shortened to λ/10.That is to say, can the extending length direction, be the length of conductor plate of the bearing of trend of slit 21.Therefore, even the distance that shortens between conductor plate and the reflector also can realize broadband.Promptly, in antenna 101, can expand gain, standing-wave ratio (be commonly referred to as SWR (StandingWave Ratio: standing-wave ratio) or VSWR (Voltage Standing Wave Ratio: voltage standing wave ratio)) and front and back the frequency band that obtains superperformance such as compare.
In addition, conductor plate 29 is not limited to rectangular shape, so long as have along its length extend and relative mutually both sides and along with length direction roughly the Width of quadrature extend and mutually the shape on relative both sides get final product.The shape of conductor plate 29 also can be the shape of having got chamfering for example, can also be the polygonal beyond the rectangle.In addition, slit 21 is not limited to rectangular shape, so long as the shape of extending along the length direction of conductor plate 29 gets final product.
Also can make conductor plate 27 and 28 dividually with conductor plate 29, by with conductor plate 27 and 28 and conductor plate 29 be electrically connected to fetch and form emitter 11A.For example, can come bonding conductor plate 27 and 28 and conductor plate 29 by lead, can also welding conductors plate 27 and 28 and conductor plate 29.
Fig. 4 is the curve chart of the relation between the frequency of related antenna gain of expression first execution mode of the present invention and received signal.In Fig. 4, dotted line is represented the characteristic of slot antenna in the past, and solid line is represented the characteristic of antenna 101.
With reference to Fig. 4, in the scope of the 470MHz～800MHz that removes 530MHz～570MHz, antenna 101 is compared with slot antenna in the past has high-gain, has realized good reception characteristics.Particularly at the high frequency of UHF frequency band, be the high frequency side of 680MHz～770MHz, antenna 101 has high-gain, compared with the past being greatly improved.
In the related antenna of first execution mode of the present invention, by adopting plane antenna structure, can be easily positioned on the metope in house, and not need as Yagi spark gap formula antenna in the past, to be arranged on the roof, and since thinner, therefore also can not damage setting.In addition, by adopting gap structure,, therefore can make feed method and structure become simple as long as only current feed department is set a position.
As mentioned above, in the related antenna of first execution mode of the present invention, can realize slimming, prevent that mechanical strength from reducing, and obtain good characteristic.That is, can access slim, high-performance and firm planar antenna.
Then, use description of drawings other execution mode of the present invention.In addition, to identical among the figure or the additional same tag of considerable part, do not repeat its explanation.
＜the second execution mode 〉
Present embodiment relates to the related antenna of a kind of and first execution mode and compares the structure that has changed emitter and the antenna that obtains.The related antenna of content except that the following content that will illustrate and first execution mode is identical.
Fig. 5 is the stereogram of the related antenna structure of expression second execution mode of the present invention.Fig. 6 is the front view of the related antenna structure of expression second execution mode of the present invention.
(a) of Fig. 7 is the vertical view of the structure of the related emitter that antenna comprised of expression second execution mode of the present invention.(b) of Fig. 7 is the front view of the structure of the related emitter that antenna comprised of expression second execution mode of the present invention.(c) of Fig. 7 is the end view of the structure of the related emitter that antenna comprised of expression second execution mode of the present invention.
With reference to Fig. 5～Fig. 7, antenna 102 possesses emitter 11B and reflector 12.Emitter 11B comprises conductor plate 23,24,25,26,29.
In addition, conductor plate 23,24,25,26 from conductor plate 29 to reflector 12 lateral bucklings.That is, conductor plate 23 and conductor plate 24 are outstanding in the mode that the same main surface side to conductor plate 29 bends.By this structure, can reduce the width of antenna 102 and highly realize miniaturization. Form conductor plate 23,24,25,26,29 by bending a slice conductor plate.In addition, also can make conductor plate 23,24,25,26 dividually, fetch by conductor plate 23,24,25,26 and conductor plate 29 are electrically connected and form emitter 11B with conductor plate 29.For example, can come bonding conductor plate 23,24,25,26 and conductor plate 29 by lead, can also welding conductors plate 23,24,25,26 and conductor plate 29.
In addition, conductor plate 23,24 also can be other shape beyond the rectangle.For example, the shape of conductor plate 23,24 can be a triangle, also can be trapezoidal, can also be the shape with notch.
Fig. 8 is the curve chart of the relation between the frequency of related antenna gain of expression second execution mode of the present invention and received signal.In Fig. 8, dotted line is represented the characteristic of slot antenna in the past, and solid line is represented the characteristic of antenna 102.
With reference to Fig. 8, in the scope of 470MHz～800MHz, antenna 102 is compared with slot antenna in the past has high-gain, has realized good reception characteristics.Particularly at the low frequency of UHF frequency band, be the lower frequency side of 470MHz～560MHz, antenna 102 has high-gain, compared with the past being greatly improved.
Thereby, in the related antenna of second execution mode of the present invention, can realize slimming, prevent that mechanical strength from reducing, and obtain good characteristic.That is, can access slim, high-performance and firm planar antenna.
In addition, being made as antenna 102 is the structures that possess conductor plate 25 and 26, but conductor plate 25 and 26 is not to be essential structure in the present invention, also can not obtain good characteristic in broadband even do not possess the structure of conductor plate 25 and 26.
Other structure is identical with the antenna that moves and first execution mode is related, does not therefore repeat detailed explanation at this.
Then, use accompanying drawing that other execution mode of the present invention is described.In addition, to identical among the figure or the additional same tag of considerable part, do not repeat its explanation.
＜the three execution mode 〉
Present embodiment relates to the characteristics combination of the related antenna of a kind of antenna that first execution mode is related and second execution mode and the antenna that obtains.
Fig. 9 is the stereogram of the related antenna structure of expression the 3rd execution mode of the present invention.Figure 10 is the front view of the related antenna structure of expression the 3rd execution mode of the present invention.
(a) of Figure 11 is the vertical view of the structure of the related emitter that antenna comprised of expression the 3rd execution mode of the present invention.(b) of Figure 11 is the front view of the structure of the related emitter that antenna comprised of expression the 3rd execution mode of the present invention.(c) of Figure 11 is the end view of the structure of the related emitter that antenna comprised of expression the 3rd execution mode of the present invention.
With reference to Fig. 9～Figure 11, antenna 103 possesses emitter 11C and reflector 12.Emitter 11C comprises conductor plate 23～29.
Figure 12 is the curve chart of the relation between the frequency of related antenna gain of expression the 3rd execution mode of the present invention and received signal.In Figure 12, dotted line is represented the characteristic of slot antenna in the past, and solid line is represented the characteristic of antenna 103.
With reference to Figure 12, the conductor plate 27 and 28 and the conductor plate 23 of antenna 102 and 24 this two sides' structure of antenna 103 by possessing antenna 101 is in the whole frequency band of UHF frequency band, be the high gain of slot antenna that all has in the scope of the scope of 470MHz～770MHz and 770MHz～800MHz than in the past.Antenna 103 is compared with 102 with antenna 101 and has been realized better receiving feature.
The related antenna of other structure and action and first execution mode and second execution mode is identical, so does not repeat detailed explanation at this.
Claims (9)
1. an antenna possesses first conductor plate, and this first conductor plate has extension along its length and extend and mutual relative the 3rd limit and the 4th limit with the Width of above-mentioned length direction quadrature with second limit and edge on the first relative mutually limit,
The slit that extends along above-mentioned length direction is formed in above-mentioned first conductor plate and position above-mentioned first limit, above-mentioned second limit, above-mentioned the 3rd limit and above-mentioned the 4th limit partition distance,
Current feed department is set on above-mentioned first conductor plate,
Above-mentioned antenna also possesses second conductor plate and the 3rd conductor plate, and this second conductor plate and the 3rd conductor plate are outstanding from above-mentioned first limit and above-mentioned second limit respectively in a part of scope of the length direction of above-mentioned slit.
2. antenna according to claim 1 is characterized in that,
Above-mentioned second conductor plate and above-mentioned the 3rd conductor plate are outstanding from above-mentioned first limit and above-mentioned second limit bendingly respectively.
3. antenna according to claim 2 is characterized in that,
Above-mentioned second conductor plate and above-mentioned the 3rd conductor plate are outstanding from above-mentioned first limit and above-mentioned second limit respectively in the mode that the same main surface side to above-mentioned first conductor plate bends.
4. antenna according to claim 1 is characterized in that,
Above-mentioned second conductor plate and above-mentioned the 3rd conductor plate are given prominence to from the central portion on above-mentioned first limit and the central portion on above-mentioned second limit respectively.
5. antenna according to claim 1 is characterized in that,
Also possess:
The 4th conductor plate, it is from above-mentioned the 3rd limit bending; And
The 5th conductor plate, it is from above-mentioned the 4th limit bending.
6. antenna according to claim 1 is characterized in that,
Also possess the 6th conductor plate and the 7th conductor plate that bend respectively from above-mentioned first limit and above-mentioned second limit,
The end that above-mentioned second conductor plate is relative from the end with above-mentioned first avris of above-mentioned the 6th conductor plate is outstanding,
The end that above-mentioned the 3rd conductor plate is relative from the end with above-mentioned second avris of above-mentioned the 7th conductor plate is outstanding.
7. according to each the described antenna in the claim 1 to 6, it is characterized in that,
Also possess and the relative reflector of above-mentioned first conductor plate.
8. an antenna possesses first conductor plate, and this first conductor plate has extension along its length and extend and mutual relative the 3rd limit and the 4th limit with the Width of above-mentioned length direction quadrature with second limit and edge on the first relative mutually limit,
Slit is formed in above-mentioned first conductor plate and position above-mentioned first limit, above-mentioned second limit, above-mentioned the 3rd limit and above-mentioned the 4th limit partition distance,
Current feed department is set on above-mentioned first conductor plate,
Above-mentioned antenna also possesses:
Second conductor plate, it is from above-mentioned the 3rd limit bending; And
The 3rd conductor plate, it is from above-mentioned the 4th limit bending.
9. antenna according to claim 8 is characterized in that,
Also possess and the relative reflector of above-mentioned first conductor plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-217279 | 2009-09-18 | ||
| JP2009217279A JP4979030B2 (en) | 2009-09-18 | 2009-09-18 | antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102025029A true CN102025029A (en) | 2011-04-20 |
| CN102025029B CN102025029B (en) | 2014-09-10 |
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ID=43866055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010188528.8A Expired - Fee Related CN102025029B (en) | 2009-09-18 | 2010-05-31 | Antenna |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4979030B2 (en) |
| CN (1) | CN102025029B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5925594B2 (en) * | 2012-05-17 | 2016-05-25 | Ｄｘアンテナ株式会社 | antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087683A1 (en) * | 1982-02-24 | 1983-09-07 | Fracarro Radioindustrie | Radiant-slot television aerial, especially for indoor use |
| JP2002084130A (en) * | 2000-09-06 | 2002-03-22 | Maspro Denkoh Corp | Uhf antenna |
| JP2007059966A (en) * | 2005-08-22 | 2007-03-08 | Nippon Dengyo Kosaku Co Ltd | Antenna and array antenna |
| KR100755632B1 (en) * | 2006-04-19 | 2007-09-04 | 삼성전기주식회사 | Multi-band u-slot antenna |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5252550A (en) * | 1975-10-25 | 1977-04-27 | Sumitomo Electric Ind Ltd | Reception antenna |
| JP4246363B2 (en) * | 2000-09-06 | 2009-04-02 | マスプロ電工株式会社 | UHF antenna |
-
2009
- 2009-09-18 JP JP2009217279A patent/JP4979030B2/en not_active Expired - Fee Related
-
2010
- 2010-05-31 CN CN201010188528.8A patent/CN102025029B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0087683A1 (en) * | 1982-02-24 | 1983-09-07 | Fracarro Radioindustrie | Radiant-slot television aerial, especially for indoor use |
| JP2002084130A (en) * | 2000-09-06 | 2002-03-22 | Maspro Denkoh Corp | Uhf antenna |
| JP2007059966A (en) * | 2005-08-22 | 2007-03-08 | Nippon Dengyo Kosaku Co Ltd | Antenna and array antenna |
| KR100755632B1 (en) * | 2006-04-19 | 2007-09-04 | 삼성전기주식회사 | Multi-band u-slot antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4979030B2 (en) | 2012-07-18 |
| CN102025029B (en) | 2014-09-10 |
| JP2011066793A (en) | 2011-03-31 |
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