CN103560318B - A kind of miniaturized directed radiation printed antenna - Google Patents
A kind of miniaturized directed radiation printed antenna Download PDFInfo
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- CN103560318B CN103560318B CN201310507379.0A CN201310507379A CN103560318B CN 103560318 B CN103560318 B CN 103560318B CN 201310507379 A CN201310507379 A CN 201310507379A CN 103560318 B CN103560318 B CN 103560318B
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Abstract
The invention discloses a kind of miniaturized directed radiation printed antenna, twofold inverted L-shaped conductive trace lower end connects feed conductive trace, parasitic radiation element is arranged at space directly over twofold inverted L-shaped conductive trace, and metal floor is arranged on the back side of feed conductive trace; Twofold inverted L-shaped conductive trace is equaled the wire of 3/4ths operation wavelengths through repeatedly bending, being formed the external electromagnetic field incentive structure with two sections of long conductors that are parallel to each other by length.The present invention adopts twofold inverted L shape spatial excitation structure, desirable directional radiation properties can be obtained, add parasitic radiation element, enhance the forward radiation gain of antenna, make use of the mutual coupling principle in space, adopt antenna close-spaced technique, have compressed space, reduce the size of antenna, adopt printing flat plane antenna technology, radiant body and ground belong in the plane that is parallel to each other, make full use of the device space and are beneficial to the integrated of antenna and circuit board.
Description
Technical field
The invention belongs to technical field of electronic communication, particularly relate to a kind of miniaturized directed radiation printed antenna.
Background technology
Along with further investigation and the development of wireless communication technology, communication system performance is able to continuous lifting, and the design that antenna becomes more meticulous starts studied personnel and pays close attention to and pay attention to, to meet all kinds of demands of new opplication feature and improving performance.For the current and following mobile terminal device, development trend is that volume is more and smaller and more exquisite, and profile is more and more attractive in appearance, and performance also will keep even realizing promoting simultaneously, and this proposes strict even harsh requirement to Antenna Design.Traditional antenna design in, based on basic antenna prototype, reduction antenna size by with other performance of sacrificing antenna for cost.And the thought implementing antenna minute design catches different application particular point, brand-new design is carried out to antenna structure, balancing antenna properties, realize optimum antenna design.
Directional radiation antenna, relative to omnidirectional antenna, refers to that aerial radiation has obvious directivity.In the design of traditional directional antenna, often add these two kinds of prototype antenna of reflecting plate based on microstrip antenna and symmetrical dipole and carry out structural adjustment and amendment, to meet specific application demand.There is the occasion of requirements at the higher level at directional, also may can use the aerial array of multiple antenna element composition.For fixing terminal equipment, due to few to the size of antenna and weight limits in application, this traditional directional antenna design mostly can be adopted.And in the design of portable mobile terminal equipment antenna, adopt the hand-held radio frequency identification reader volume of conventional microstrip antenna and doublet antenna design all too huge, even need to increase extra module to provide suitable space and angle assembling antenna, the volume that this obviously increases equipment, the portable characteristics reducing equipment and aesthetic property.And the omnidirectional antenna design of miniaturization meets confined space size and structure needs with passive, cause antenna index to worsen, occur the situation of operating distance deficiency, poor signal quality in some wireless application systems.Propose a kind of antenna with directional radiation properties compact again, the antenna design that integration of equipmentsization can meet again prosthesis design needs can be met and annoying designer.
Summary of the invention
The object of the present invention is to provide a kind of miniaturized directed radiation printed antenna, be intended to solve in the design of portable mobile terminal equipment antenna, be difficult to have concurrently directional radiation properties have again compact advantage, not only can not meet integration of equipments but also meet the problem that prosthesis designs needs.
The present invention is achieved in that a kind of miniaturized directed radiation printed antenna, and this miniaturized directional radiation antenna comprises: feed conductive trace, twofold inverted L-shaped conductive trace, parasitic radiation element, metal floor; Twofold inverted L-shaped conductive trace lower end connects feed conductive trace, and parasitic radiation element is arranged at space directly over twofold inverted L-shaped conductive trace, and metal floor is arranged on the back side of feed conductive trace; Twofold inverted L-shaped conductive trace is equaled the wire of 3/4ths operation wavelengths through repeatedly bending, being formed the external electromagnetic field incentive structure with two sections of long conductors that are parallel to each other by length.
Further, parasitic radiation element has long narrow linear pattern or bending type structure, be positioned over directly over twofold inverted L-shaped conductive trace, be placed on same or different masses dielectric-slab by circuit board printing technology and twofold inverted L-shaped structure, also can be formed by processing metal line/face structure, then be fixed on above twofold inverted L-shaped conductive trace.
Further, feed conductive trace adopts microstrip line, two-conductor line, coaxial transmission line, coplanar waveguide transmission line or strip line transmission lines.
Further, this miniaturized directed radiation printed antenna adopts antenna close-spaced technique to realize the reduction of longitudinal size, and concrete grammar is:
Parasitic radiation element and radiating element spacing are compressed to 0.03 λ
0below, and to adjust in twofold inverted L-shaped conductive trace between two sections of parallel long conductors and the width of the distance of lower conductor and metal floor top edge reach Antenna Impedance Matching.
Miniaturized directed radiation printed antenna provided by the invention, adopt twofold inverted L shape spatial excitation structure, desirable directional radiation properties can be obtained, add parasitic radiation element, enhance the forward radiation gain of antenna, make use of the mutual coupling principle in space, adopt antenna close-spaced technique, have compressed space, reduce the size of antenna, adopt printing flat plane antenna technology, radiant body and ground belong in the plane that is parallel to each other, make full use of the device space and are beneficial to the integrated of antenna and circuit board.
Accompanying drawing explanation
Fig. 1 is the structural representation of the miniaturized directed radiation printed antenna that the embodiment of the present invention provides.
In figure: 1, feed conductive trace; 2, twofold inverted L-shaped conductive trace; 3, parasitic radiation element; 4, metal floor.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows the structure of a kind of miniaturized directed radiation printed antenna of the present invention, comprising: feed conductive trace 1, twofold inverted L-shaped conductive trace 2, parasitic radiation element 3, metal floor 4 form; Twofold inverted L-shaped conductive trace 2 lower end connects feed conductive trace 1, twofold inverted L-shaped conductive trace 1 superjacent air space axis place, introduce the long narrow shape parasitic radiation element 3 of independence that a length is about 1/3rd operation wavelengths, play the guiding function of spatial electromagnetic energy, metal floor 4 is arranged on the back side of feed conductive trace 1, and metal floor top edge and feed conductive trace upper edge are in same level height.
Twofold inverted L-shaped conductive trace 2 equals the wire of 3/4ths operation wavelengths through repeatedly bending by length, formed and there is the external electromagnetic field incentive structure that two sections of long conductors that are parallel to each other are principal character, twofold inverted L-shaped conductive trace 2 lower end is directly connected with feed conductive trace 1, feed conductive trace 1 lower end and signal circuit line are directly connected the feed realizing antenna, at twofold inverted L-shaped conductive trace 1 superjacent air space axis place, introduce the long narrow shape parasitic radiation element 3 of independence that a length is about 1/3rd operation wavelengths, play the guiding function of spatial electromagnetic energy, realize the enhancing effect of top (forward direction) radiation,
Feed conductive trace 1 adopts microstrip line mode to form, but still the feed wire type constitution of other types can be adopted, comprise and be not limited to two-conductor line, coaxial transmission line, coplanar waveguide transmission line and strip line transmission lines, adopt antenna close-spaced technique to realize the reduction of longitudinal size, concrete grammar is that parasitic radiation element 3 and twofold inverted L-shaped conductive trace 2 spacing are compressed to 0.03 λ
0below, and to adjust in twofold inverted L-shaped conductive trace 2 between two sections of parallel long conductors and the width of the distance of lower conductor and metal floor 4 top edge reach Antenna Impedance Matching;
The present invention adopts twofold inverted L shape spatial excitation structure, desirable directional radiation properties can be obtained, add parasitic radiation element 3, enhance the forward radiation gain of antenna, make use of the mutual coupling principle in space, adopt antenna close-spaced technique, have compressed space, reduce the size of antenna, adopt printing flat plane antenna technology, antenna and ground belong in the plane that is parallel to each other, make full use of the device space and are beneficial to the integrated of antenna and circuit board; The lateral dimension of aerial radiation part is less than 0.37 λ
0, longitudinal size is less than 0.08 λ
0(λ
0centered by the corresponding free space wavelength of operating frequency), and conventional symmetrical oscillator adds the corresponding of reflection plate antenna and is of a size of 0.5 λ
0with 0.25 λ
0.Inventive antenna test maximum gain is 6.7dBi, and the theoretical maximum gain that conventional symmetrical oscillator adds metal floor is 5.15dBi.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that performing creative labour can make still within protection scope of the present invention.
Claims (1)
1. a miniaturized directed radiation printed antenna, is characterized in that, this miniaturized directed radiation printed antenna comprises: feed conductive trace, twofold inverted L-shaped conductive trace, parasitic radiation element, metal floor;
Twofold inverted L-shaped conductive trace lower end connects feed conductive trace, at twofold inverted L-shaped conductive trace superjacent air space axis place, introduce the long narrow shape parasitic radiation element of independence that a length is 1/3rd operation wavelengths, play the guiding function of spatial electromagnetic energy, realize the enhancing effect of top radiation; Metal floor is arranged on the back side of feed conductive trace, and metal floor top edge and feed conductive trace upper edge are in same level height; Twofold inverted L-shaped conductive trace is equaled the wire of 3/4ths operation wavelengths through repeatedly bending, being formed the external electromagnetic field incentive structure with two sections of long conductors that are parallel to each other by length;
Parasitic radiation element adopts long narrow linear pattern or bending type, be positioned over directly over twofold inverted L-shaped conductive trace, be placed on same or different masses dielectric substrate by circuit board printing technology and twofold inverted L-shaped structure, also can be formed by processing metal line/face structure, then be fixed on above twofold inverted L-shaped conductive trace;
Feed conductive trace adopts microstrip line, two-conductor line, coaxial transmission line, coplanar waveguide transmission line or strip line transmission lines;
This miniaturized directed radiation printed antenna adopts antenna close-spaced technique to realize the reduction of longitudinal size, and concrete grammar is:
Parasitic radiation element and radiating element spacing are compressed to 0.03 λ
0below, and to adjust in twofold inverted L-shaped conductive trace between two sections of parallel long conductors and the distance of lower conductor and metal floor top edge to reach Antenna Impedance Matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310507379.0A CN103560318B (en) | 2013-10-24 | 2013-10-24 | A kind of miniaturized directed radiation printed antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310507379.0A CN103560318B (en) | 2013-10-24 | 2013-10-24 | A kind of miniaturized directed radiation printed antenna |
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| Publication Number | Publication Date |
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| CN103560318A CN103560318A (en) | 2014-02-05 |
| CN103560318B true CN103560318B (en) | 2016-04-13 |
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| CN201310507379.0A Active CN103560318B (en) | 2013-10-24 | 2013-10-24 | A kind of miniaturized directed radiation printed antenna |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092017A (en) * | 2014-07-07 | 2014-10-08 | 昆山联滔电子有限公司 | Coupling enhanced antenna |
| CN111628274B (en) * | 2019-02-27 | 2022-10-04 | 华为技术有限公司 | Antenna device and electronic apparatus |
| US11949177B2 (en) | 2019-02-27 | 2024-04-02 | Huawei Technologies Co., Ltd. | Antenna apparatus and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5489914A (en) * | 1994-07-26 | 1996-02-06 | Breed; Gary A. | Method of constructing multiple-frequency dipole or monopole antenna elements using closely-coupled resonators |
| CN1588693A (en) * | 2004-09-23 | 2005-03-02 | 上海交通大学 | Small wide frequency printed single pole antenna |
| CN102265457A (en) * | 2011-06-03 | 2011-11-30 | 华为终端有限公司 | Wireless terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050099335A1 (en) * | 2003-11-10 | 2005-05-12 | Shyh-Jong Chung | Multiple-frequency antenna structure |
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- 2013-10-24 CN CN201310507379.0A patent/CN103560318B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5489914A (en) * | 1994-07-26 | 1996-02-06 | Breed; Gary A. | Method of constructing multiple-frequency dipole or monopole antenna elements using closely-coupled resonators |
| CN1588693A (en) * | 2004-09-23 | 2005-03-02 | 上海交通大学 | Small wide frequency printed single pole antenna |
| CN102265457A (en) * | 2011-06-03 | 2011-11-30 | 华为终端有限公司 | Wireless terminal |
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Effective date of registration: 20170112 Address after: Dingshuzhen pottery road in Yixing city of Jiangsu Province, Wuxi City, No. 138 Patentee after: Jiangsu Hengxin Science & Technology Co., Ltd. Address before: Taibai Road Shaanxi Yanta District 710071 city of Xi''an province No. 2 Patentee before: Xian Electronics Science & Technology Univ. |