CN105896074B - A kind of broadband planar electronically small antenna of coplanar wave guide feedback - Google Patents

A kind of broadband planar electronically small antenna of coplanar wave guide feedback Download PDF

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Publication number
CN105896074B
CN105896074B CN201610298201.3A CN201610298201A CN105896074B CN 105896074 B CN105896074 B CN 105896074B CN 201610298201 A CN201610298201 A CN 201610298201A CN 105896074 B CN105896074 B CN 105896074B
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China
Prior art keywords
antenna
radiating surface
gap
slab
dielectric
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CN201610298201.3A
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Chinese (zh)
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CN105896074A (en
Inventor
刘伟娜
郝喜庆
刘海瑞
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河南师范大学
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Abstract

The invention discloses a kind of broadband planar electronically small antennas of coplanar wave guide feedback, and earth plate is equipped on dielectric-slab, selects the geometric center of dielectric-slab for origin;Two long gaps and centre conduction band that symmetrical co-planar waveguide is etched on earth plate, are symmetrically equipped with Double-spiral radiating surface in the outside in two gap of co-planar waveguide, the place of intermediate conduction band close to radiating surface is etched with finger-like gap.The beneficial effects of the present invention are: having broadened the working band of antenna due to the vertical, horizontal size for reducing antenna using double helical form radiating surface;Antenna size is small, and structure is relatively easy, has wider bandwidth.

Description

A kind of broadband planar electronically small antenna of coplanar wave guide feedback

Technical field:

The present invention relates to wireless aerial technical field, the small day of broadband planar electricity of especially a kind of coplanar wave guide feedback Line.

Background technique:

In a wireless communication system, the size of antenna is related with its operation wavelength.The general electric size T for working as antenna is less than 1 When, electronically small antenna can be referred to as.Electric size T=the KL, K of antenna are free space wave number, and L is the greatest physical size of antenna. Critical component of the electronically small antenna as communication system front end, size, radiation efficiency, directionality, impedance matching and system Making cost etc. has strong influence to wireless communication especially mobile communication.The development in present communications market is to electronically small antenna It is miniaturization, diversification, beautiful and light and handy etc. propose more and more requirements.And it is theoretical by " the Chu limit " it is found that electricity is small The electric size of antenna is smaller, then quality factor q is bigger, and the bandwidth of antenna is also narrower, so that the overall performance of antenna be made to be deteriorated.Cause This, at the same have the small, broadband of electricity, efficient Antenna Design be it is very difficult, its successful design is in practical engineering application In have very important application value.

" AEU:International Journal of Electronic and commination " 2011,65 (2): 148-153. has delivered a kind of electronically small antenna for working in 2.4GHz, is existed using the electronically small antenna that impedance matching circuit designs Working frequency points reflection coefficient S11Can be down to -28dB or so, but the electronically small antenna bandwidth is very narrow, S11It is below in -10dB Relative bandwidth is about 4.5%.

Summary of the invention:

The purpose of the present invention is design one kind to be able to satisfy communication system requirements and bandwidth, small in size, light and handy and inexpensive Coplanar wave guide feedback broadband planar electronically small antenna.

The technical scheme is that a kind of broadband planar electronically small antenna of coplanar wave guide feedback, it is characterised in that: be situated between Scutum is equipped with earth plate, selects the geometric center of dielectric-slab for origin;The two of symmetrical co-planar waveguide are etched on earth plate Long gap and intermediate conduction band, are symmetrically equipped with Double-spiral radiating surface in the outside in two gap of co-planar waveguide, intermediate conduction band connects The place of nearly radiating surface is etched with finger-like gap.

The beneficial effects of the present invention are: improving the resistance in antenna broadband by loading finger-like gap on intermediate conduction band Anti- matching and standing-wave ratio reduce reflection, improve the working efficiency of antenna;Antenna is reduced using double helical form radiating surface Vertical, horizontal size has broadened the working band of antenna;Antenna size is small, and structure is relatively easy, has wider bandwidth, S11It is small It is 3.75-4.63GHz in the frequency band of -10dB, relative bandwidth has reached 21%.

Detailed description of the invention:

Fig. 1 is structural schematic diagram of the present invention.

Fig. 2 is the return loss (S of antenna of the present invention11);

Fig. 3 is the standing-wave ratio of antenna of the present invention;

Fig. 4 is Antenna Operation of the present invention E-plane and H-plane pattern in 4GHz, and A represents the face H in figure, and B represents E Face.

Specific embodiment:

Specific embodiments of the present invention,

A kind of broadband planar electronically small antenna of coplanar wave guide feedback is equipped with earth plate 1 on dielectric-slab, selects dielectric-slab Geometric center is origin;Two long gaps 2 and centre conduction band of symmetrical co-planar waveguide are etched on earth plate;In co-planar waveguide The outside in two gaps is symmetrically equipped with Double-spiral radiating surface 5;The place of intermediate conduction band close to radiating surface is etched with finger-like gap 4, rest part is feed area 3.

A kind of antenna of the ultra wide band Double-spiral radiating surface of coplanar wave guide feedback of the present invention includes: on dielectric-slab Earth plate 1, select the center of dielectric-slab for coordinate origin;Two gaps 2 of co-planar waveguide, current feed department are etched on earth plate 1 Points 3, the finger-like gap 4 of load and Double-spiral radiating surface 5.Double-spiral radiating surface 5 is symmetrical about Y-axis, the finger-like seam of load Gap not only reduces the overall dimension of antenna, improves the impedance of broadband internal antenna, also improves the standing-wave ratio in entire frequency band. The results show that the finger-like gap of load makes the standing-wave ratio in entire frequency band less than 2, double helix radiating surface substantially reduces antenna Size has widened the bandwidth of operation of antenna.

The final size of product of the present invention is 10mm*7mm*0.8mm, has good compactedness.Fig. 2 shows institutes State the S of electronically small antenna11Frequency characteristic, wherein abscissa represents frequency variable, unit GHz, and ordinate represents return loss (S11) amplitude variations, unit dB, the results show that in 3.75GHz-4.63GHz frequency range, S11<-10dB;The width Standing-wave ratio with electronically small antenna in entire frequency range is as shown in Figure 3, it is seen then that in the frequency range standing internal wave ratio less than 2; Electronically small antenna of the present invention in 4GHz the antenna pattern in the face E and the face H as shown in figure 4, from fig. 4, it can be seen that the face side E It is in the figure of eight to figure, there is certain directionality, the face H directional diagram radiates very well when 0-180 is spent.

The above embodiments are merely examples for clarifying the description, and does not limit the embodiments.For institute For the those of ordinary skill in category field, other various forms of variations or change can also be made on the basis of the above description It is dynamic.There is no necessity and possibility to exhaust all the enbodiments, and obvious variation extended from this or change It moves within still in the protection scope of the invention.

Claims (1)

1. a kind of broadband planar electronically small antenna of coplanar wave guide feedback, it is characterised in that: be equipped with earth plate, selection on dielectric-slab The geometric center of dielectric-slab is origin;Two long gaps and centre conduction band of symmetrical co-planar waveguide are etched on earth plate;? The outside of two long gaps of co-planar waveguide is symmetrically equipped with Double-spiral radiating surface, and Double-spiral radiating surface is the slot of terminal short circuit Line detail;For intermediate conduction band close to the place load finger-like gap of radiating surface as wideband impedance match network, finger-like gap is eventually The slot detail of open circuit is held, rest part is feed area;The broadband planar electronically small antenna have wider bandwidth, S11 be less than- The frequency band of 10dB is 3.75-4.63GHz, relative bandwidth 21%.
CN201610298201.3A 2016-05-09 2016-05-09 A kind of broadband planar electronically small antenna of coplanar wave guide feedback CN105896074B (en)

Priority Applications (1)

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CN201610298201.3A CN105896074B (en) 2016-05-09 2016-05-09 A kind of broadband planar electronically small antenna of coplanar wave guide feedback

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610298201.3A CN105896074B (en) 2016-05-09 2016-05-09 A kind of broadband planar electronically small antenna of coplanar wave guide feedback

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CN105896074A CN105896074A (en) 2016-08-24
CN105896074B true CN105896074B (en) 2019-05-31

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107834191A (en) * 2017-12-19 2018-03-23 河南师范大学 A kind of single-screw slot antenna of coplanar wave guide feedback
CN108110426B (en) * 2017-12-19 2019-11-01 河南师范大学 A kind of double helix slot antenna applied to wireless communication

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60022096T2 (en) * 2000-01-19 2006-06-01 Fractus, S.A. Room filling miniature antenna

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《A 2.45-GHz Electrically Small Slot Antenna》;Koen Van Caekenberghe et-al;《IEEE Antennas and Wireless Propagation Letters》;20080331;第7卷;第346-348页

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