CN102280697A - Double-Z-shaped microstrip antenna - Google Patents
Double-Z-shaped microstrip antenna Download PDFInfo
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- CN102280697A CN102280697A CN2011101100287A CN201110110028A CN102280697A CN 102280697 A CN102280697 A CN 102280697A CN 2011101100287 A CN2011101100287 A CN 2011101100287A CN 201110110028 A CN201110110028 A CN 201110110028A CN 102280697 A CN102280697 A CN 102280697A
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Abstract
The invention discloses a double-Z-shaped microstrip antenna, which comprises a substrate (1), a first Z-shaped metal plaster (2) and a second Z-shaped metal plaster (3), wherein the first Z-shaped metal plaster is arranged on the front face of the substrate (1), the second Z-shaped metal plaster (3) is arranged on the reverse face of the substrate (1), an excitation source on the substrate (1) is electrically connected with the center of a first inclined arm (2.1) of the first Z-shaped metal plaster through a feed port (4), a first up-down arm (2.2) of the first Z-shaped metal plaster (2) is mutually vertical to a second up-down arm (3.2) of the second Z-shaped metal plaster (3), the substrate (1) is provided with at least three rows of round holes (5) from the center to all directions of periphery, and the distances between adjacent round holes (5) in each row are equal. The double-Z-shaped microstrip antenna can be used for inhibiting surface waves and reducing return loss and has higher emission efficiency.
Description
Technical field
The present invention relates to wireless communication field, specifically is a kind of two Z-shaped microstrip antenna.
Background technology
In wireless telecommunication system, microstrip antenna is a class new antenna that grows up gradually over nearly 30 years.Microstrip antenna commonly used is on a thin-medium substrate (pressing layer as the polytetrafluoroethylene glass fibre), one side is enclosed thin metal layer as ground plate, another side is made the metal patch of definite shape with methods such as photoetching corrosions, utilize microstrip line and axis probe to the paster feed, this has just constituted microstrip antenna.Microstrip antenna has the low section of printed antenna, low cost and other advantages, has good application prospects in systems such as bluetooth, WLAN (wireless local area network).General microstrip antenna is difficult to form omnidirectional radiation, it must be formed array, thereby obtains omnidirectional radiation and improve gain, yet, the design of array antenna and processing are comparatively complicated, and microstrip antenna is subject to the self structure characteristics simultaneously, and its radiation efficiency is very low, dielectric loss is bigger.For addressing the above problem, a kind of two Z-shaped omnidirectional antenna appears at present, it comprises substrate, the front of described substrate is provided with the first Z-shaped metal patch, the reverse side of substrate is provided with the second Z-shaped metal patch, the first Z-shaped metal patch and the second Z-shaped metal patch shape, size is identical, driving source on the substrate is electrically connected by the center of feed port with the oblique arm of the substrate first Z-shaped metal patch, the oblique arm of the described first Z-shaped metal patch is parallel with the oblique arm of the second Z-shaped metal patch, the last underarm of the first Z-shaped metal patch is vertical mutually with the last underarm of the second Z-shaped metal patch, promptly two arms up and down of two Z-shaped metal patches form a square shape, the structure of forming a similar closing coil, being positioned at the second Z-shaped metal patch like this can obtain excitation from the first Z-shaped metal patch by the mode of coupling.Adopt the design of the microstrip antenna employing positive and negative double antenna of this structure, reduced size, can produce the electromagnetic wave of omnidirectional's horizontal polarization, and electric current equal and opposite in direction on the oblique arm of two groups of sky line parallels, phase place is opposite, the electromagnetic wave of radiation is cancelled each other in the far field, has improved capacity usage ratio, the radiation efficiency height.But the antenna of this structure still can produce surface wave between the substrate veneer, the electromagnetic energy shortage that causes antenna substrate to reflect away, and return loss is bigger, and emission effciency is low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of and can suppress surface wave, minimizing return loss, the two Z-shaped microstrip antenna that emission effciency is higher.
Technical scheme of the present invention is, a kind of two Z-shaped microstrip antenna is provided, it comprises that the front of substrate, described substrate is provided with the first Z-shaped metal patch, the reverse side of substrate is provided with the second Z-shaped metal patch, driving source on the substrate is electrically connected by the center of feed port with first oblique arm of the first Z-shaped metal patch, the first Z-shaped metal patch first on underarm and the second Z-shaped metal patch second on underarm vertical mutually, described substrate each direction around middle mind-set is provided with at least three row's circular holes, and the distance between described every row's adjacent circular holes equates.
After adopting above structure, the present invention compared with prior art has the following advantages:
The present invention's being provided with all around of metal patch on antenna substrate arranged circular holes more, form photon crystal structure, the scattering object unit of photonic crystal is hollow cylinder scattering object unit, filled media is an air, and photon crystal structure has constituted forbidden photon band, and frequency range inner surface electric current will be suppressed in the forbidden band, reduce substrate to absorption of electromagnetic wave, reduced return loss, emission effciency is higher, and the efficient that improves antenna is more than 90%.
As improvement, described first tiltedly and between second oblique arm is provided with angle, and described angle is 5～10 degree.The oblique arm of positive and negative Z-shaped metal patch forms small angle, has increased the bandwidth of antenna emission, can obtain better omnidirectional characteristic.
As improvement, on described first oblique arm and first on the junction of underarm, second oblique arm and second junction of underarm be provided with chamfering.The phenomenon that chamfering can reduce the accumulation of the wedge angle junction of electric current in metal patch is set, thereby reduces therefrom to the interference of antenna, make the frequency of antenna emission more stable, efficient is higher.
Description of drawings
Accompanying drawing 1 is the structure exploded perspective view of the two Z-shaped microstrip antennas of the present invention;
Accompanying drawing 2 is structural representations of angle of the metal patch up and down of the two Z-shaped microstrip antennas of the present invention.
As shown in the figure: 1, substrate, 2, the first Z-shaped metal patch, 2.1, first oblique arm, underarm on 2.2, first, 3, the second Z-shaped metal patch, 3.1, second oblique arm, underarm on 3.2, second, 4, feed port, 5, circular hole, 6, angle.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in the figure, a kind of two Z-shaped microstrip antennas of the present invention, it comprises substrate 1, the front of described substrate 1 is provided with the first Z-shaped metal patch 2, the reverse side of substrate 1 is provided with the second Z-shaped metal patch 2, the described first Z-shaped metal patch 2 and the second Z-shaped metal patch 3 all adopt the preparation of metallic plate lithographic technique, both shapes are identical with size, the first Z-shaped metal patch 2 first on underarm 2.2 and the second Z-shaped metal patch 3 second on underarm 3.2 vertical mutually, promptly go up underarm and form square shape, form closed loop, the polarization of electromagnetic wave direction that aerial radiation is gone out is a horizontal polarization, promptly be parallel to substrate 1, driving source on the substrate 1 is electrically connected with the center of first oblique arm 2.1 of the first Z-shaped metal patch 2 by feed port 4, adopt coaxial line SMA port to be connected in the present embodiment with the center of first oblique arm 2.1 of the first Z-shaped metal patch 2, described substrate 1 each direction around middle mind-set is provided with at least three row's circular holes 5, distance between described every row's adjacent circular holes 5 equates, in the present embodiment substrate 1 from the center up and down left and right sides four direction be provided with four row circular holes 5, form photon crystal structure, medium is an air dielectric in the hole, can adopt suitable photon crystal structure parameter that the frequency range of forbidden photon band is set, thereby the tranmitting frequency that makes antenna is within this scope.
Enumerating a specific embodiment below illustrates: when antenna frequency f re is 2.4GHz, the normalized frequency of forbidden photon band is that 4*fre/c is 0.34, wherein c is the light velocity, adopt plane wave expansion method to calculate the crystal cycle, select the substrate of two Z-shaped microstrip antennas to be set to long 38cm, wide 38cm, spacing is 4cm, the radius of circular hole is the photon crystal structure of 1.6cm, aggregated(particle) structure can make the normalized frequency scope of the forbidden photon band of photon crystal structure be set between 0.33 to 0.35, therefore can to make operating frequency be that the electromagnetic wave of 2.4GHz can't be propagated on substrate to this structure, thereby reduced the return loss of surface wave, improved the antenna emission effciency.
As improvement, the angle 6 between described first oblique arm 2.1 and second oblique arm 3.1 is 5 degree～10 degree.The oblique arm of positive and negative Z-shaped metal patch forms small angle, has increased the bandwidth of antenna emission, can obtain better omnidirectional characteristic.
As improvement, on described first oblique arm 2.1 and first on the outside of the junction of underarm 2.2, second oblique arm 3.1 and second outside of the junction of underarm 3.2 be provided with chamfering.The phenomenon that chamfering can reduce the accumulation of the wedge angle junction of electric current in metal patch is set, thereby reduces therefrom to the interference and the thermal losses of antenna, make the frequency of antenna emission more stable, efficient is higher.
Certainly; above-mentioned explanation is not to be limit value to essential scope of the present invention; the present invention also is not limited in above-mentioned giving an example, and the variation that those skilled in the art person has done in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.
Claims (3)
1. two Z-shaped microstrip antenna, it comprises substrate (1), the front of described substrate (1) is provided with the first Z-shaped metal patch (2), the reverse side of substrate (1) is provided with the second Z-shaped metal patch (3), driving source on the substrate (1) is electrically connected with the center of first oblique arm (2.1) of the first Z-shaped metal patch (2) by feed port (4), the first Z-shaped metal patch (2) first on underarm (2.2) and the second Z-shaped metal patch (3) second on underarm (3.2) vertical mutually, it is characterized in that: described substrate (1) each direction around middle mind-set is provided with at least three row's circular holes (5), and the distance among described every row between the adjacent circular holes (5) equates.
2. two Z-shaped microstrip antenna according to claim 1 is characterized in that: be provided with angle (6) between described first oblique arm (2.1) and second oblique arm (3.1), described angle (6) is 5～10 degree.
3. two Z-shaped microstrip antenna according to claim 1 is characterized in that: on described first oblique arm (2.1) and first on the outside of the junction of underarm (2.2), second oblique arm (3.1) and second outside of the junction of underarm (3.2) be provided with chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101100287A CN102280697A (en) | 2011-04-21 | 2011-04-21 | Double-Z-shaped microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101100287A CN102280697A (en) | 2011-04-21 | 2011-04-21 | Double-Z-shaped microstrip antenna |
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| Publication Number | Publication Date |
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| CN102280697A true CN102280697A (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101100287A Pending CN102280697A (en) | 2011-04-21 | 2011-04-21 | Double-Z-shaped microstrip antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887588A (en) * | 2012-12-21 | 2014-06-25 | 三星电子株式会社 | Antenna, antenna physiological signal sensing device and method for manufacturing porous structure |
| CN106159431A (en) * | 2015-03-25 | 2016-11-23 | 美律电子(深圳)有限公司 | Manifold type fence antenna |
| CN108183324A (en) * | 2014-08-12 | 2018-06-19 | 启碁科技股份有限公司 | Antenna and Anneta module |
| CN113657572A (en) * | 2021-08-19 | 2021-11-16 | 龙兴(杭州)航空电子有限公司 | Split type electronic tags |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547776A (en) * | 1983-11-03 | 1985-10-15 | The United States Of America As Represented By The Secretary Of The Navy | Loop antenna with improved balanced feed |
| CN1162850A (en) * | 1996-04-17 | 1997-10-22 | 财团法人工业技术研究院 | All direction horizontal-polarized band antenna |
| CN101369685A (en) * | 2008-09-12 | 2009-02-18 | 江苏大学 | Photon crystal patch antenna |
-
2011
- 2011-04-21 CN CN2011101100287A patent/CN102280697A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547776A (en) * | 1983-11-03 | 1985-10-15 | The United States Of America As Represented By The Secretary Of The Navy | Loop antenna with improved balanced feed |
| CN1162850A (en) * | 1996-04-17 | 1997-10-22 | 财团法人工业技术研究院 | All direction horizontal-polarized band antenna |
| CN101369685A (en) * | 2008-09-12 | 2009-02-18 | 江苏大学 | Photon crystal patch antenna |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887588A (en) * | 2012-12-21 | 2014-06-25 | 三星电子株式会社 | Antenna, antenna physiological signal sensing device and method for manufacturing porous structure |
| CN108183324A (en) * | 2014-08-12 | 2018-06-19 | 启碁科技股份有限公司 | Antenna and Anneta module |
| CN106159431A (en) * | 2015-03-25 | 2016-11-23 | 美律电子(深圳)有限公司 | Manifold type fence antenna |
| CN106159431B (en) * | 2015-03-25 | 2020-07-28 | 美律电子(深圳)有限公司 | Coupled fence antenna |
| CN113657572A (en) * | 2021-08-19 | 2021-11-16 | 龙兴(杭州)航空电子有限公司 | Split type electronic tags |
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Application publication date: 20111214 |