CN206490175U - A kind of three-frequency antenna applied to WiMAX wave bands - Google Patents

Abstract

The utility model discloses a kind of three-frequency antenna applied to WiMAX wave bands, coplanar wave guide feedback part, the L-type gap and mushroom gap radiation face of loading in parallel are etched with metal level, coplanar wave guide feedback part includes two parallel signal transmission gaps and central metal conduction band, the first L-type gap of end short circuit is loaded with one bars transmission gap, the middle part in another bars transmission gap is disconnected, and short-circuit the second L-type gap and the 3rd L-type gap in end is loaded with respectively disconnecting position.The second L-type gap and the 3rd L-type gap constitute 180 ° of phase shifters, first L-type gap is with the second L-type gap using the center line of central metal conduction band as symmetrical axial symmetry, and central metal conduction band extends to the inside in mushroom gap radiation face and is loaded with semicircle conduction band in the end of central metal conduction band.The utility model have the advantages that compact dimensions, it is simple in construction, be easily integrated and be easy to processing, while being operable with WiMAX tri- frequency ranges of 2.5GHz, 3.6GHz and 5.8GHz.

Description

A kind of three-frequency antenna applied to WiMAX wave bands

Technical field

The utility model belongs to microwave antenna art field, and in particular to a kind of three-frequency antenna applied to WiMAX wave bands.

Background technology

With the continuous evolution of wireless communication technology, related communication product becomes more diverse, while to corresponding antenna System proposes higher requirement.Traditional single-band antenna can not meet the demand of today's society radio communication.And with electricity Sub- small product size is constantly reduced, and preferable antenna should be promoted to smaller szie, wider band direction.The ieee standard regulation whole world is micro- Ripple interconnection access（WiMAX）Three working frequency range be 2.5-2.69GHz, 3.3-3.79GHz and 5.25-5.85GHz.With micro- Wave technology is continued to develop, and the number of users of wireless communications products also sharply increasing, and more and more nervous frequency spectrum resource also will Seek the headend equipment of radio communication（Antenna）Multiple frequency bands can be worked in simultaneously, so as to increase the capacity of radio communication.Therefore Low cost, multiband, miniaturization, the flat plane antenna of three frequency ranges easy of integration and working in WiMAX simultaneously are in radio communication system There is important Research Significance in system.

Current domestic and foreign scholars have been presented for the various antennas applied to WiMAX, for example, load monopole day using rectangle Line and inverted L shape slot line structure realize 2.45GHz, 3.5GHz and 5.8GHz frequency range（Chen H, Yang X, Yin Y Z, et al. Tri-band rectangle-loaded monopole antenna with inverted-L slot for WLAN/WiMAX applications[J]. Electronics Letters, 2013, 49(20):1261-1262.）.Adopt WiMAX/Wi-Fi multifrequency antenna is realized with the circular spike-tooth antenna of coplanar wave guide feedback（Daniel R S, Suganthi S. Design and simulation of CPW fed circular spike antenna for wireless applications[C]“International Conference on Innovations in Information, Embedded and Communication Systems. IEEE, 2015:1-5.”）.Although these methods all realize many Frequency antenna and electromagnetic compatibility is met, but structure is somewhat complicated and size is larger, is unfavorable for processing.

The content of the invention

The technical problem that the utility model is solved there is provided a kind of simple and compact for structure and convenient processing be applied to The three-frequency antenna of WiMAX wave bands.

The utility model for solve above-mentioned technical problem adopt the following technical scheme that, it is a kind of applied to WiMAX wave bands three Frequency antenna, includes the medium substrate of one side coating metal layer, it is characterised in that：Co-planar waveguide feedback is etched with described metal level Electric part, the L-type gap and mushroom gap radiation face of loading in parallel, coplanar wave guide feedback part includes two parallel signals The first L-type gap that end short circuit is loaded with gap and central metal conduction band, bars transmission gap therein is transmitted, separately One bars transmission gap middle part disconnect, disconnect position end be loaded with respectively end short circuit the second L-type gap and 3rd L-type gap, the second L-type gap and the 3rd L-type gap constitute 180 ° of phase shifters, the first L-type gap and the second L-type gap Using the center line of central metal conduction band as symmetrical axial symmetry, central metal conduction band extends to the inside in mushroom gap radiation face simultaneously And it is loaded with semicircle conduction band in its end.

Further preferably, described medium substrate uses Rogers R4003C, its length L to be 28mm, and width W is 24mm, Thickness is 0.8mm, and metal level is copper, and metal layer thickness is 18 μm.

Further preferably, described coplanar wave guide feedback partial-length L1=6mm, central metal conduction band width W1= 2.13mm, signal transmission gap width g1=0.15mm, L-type gap length L6=7mm, L-type slit bends partial-length L7= Metal conduction band width W2 between 3.8mm, L-type gap width g2=0.15mm, 180 ° of phase shifters=1.8mm, L-type gap to mushroom Shape gap radiation face apart from L2=7mm, central metal conduction band extends to the length L3=3.2mm in mushroom gap radiation face, half Length L5=10.8mm of gap end is transmitted away from signal in radius L4=3.6mm of circular conduction band, mushroom gap radiation face end.

The utility model has the advantages that compared with prior art：Using coplanar wave guide feedback, it is easy to integrated, day Linear dimension is compact, the semicircle conduction band loaded by mushroom gap radiation face and feeder line central metal conduction band end, makes antenna Two frequency ranges of 2.5GHz and 3.6GHz are generated, and loading L-type gap in parallel generates the 3rd work of antenna on feeder line Frequency range 5.8GHz, and in above three frequency range, return loss is below -10dB.Therefore the utility model has size tight Gather, it is simple in construction, be easily integrated and be easy to processing advantage, while being operable with WiMAX 2.5GHz, 3.6GHz and 5.8GHz Three frequency ranges.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 is overall structure size marking figure of the present utility model；

Fig. 3 is return loss plot of the present utility model；

Fig. 4 is standing-wave ratio of the present utility model；

Fig. 5 is E face directional diagram of the utility model in 3.6GHz；

Fig. 6 is H face directional diagram of the utility model in 3.6GHz.

In figure：1st, medium substrate, 2, metal level, 3, coplanar wave guide feedback part, 4, mushroom gap radiation face, 5, signal Transmit gap, 6, central metal conduction band, the 7, first L-type gap, the 8, second L-type gap, the 9, the 3rd L-type gap, 10, semicircle leads Band.

Embodiment

Particular content of the present utility model is described in detail with reference to accompanying drawing.As shown in Figure 1-2, it is a kind of to be applied to WiMAX wave bands Three-frequency antenna, include being etched with coplanar wave guide feedback portion on the medium substrate 1 of one side coating metal layer 2, described metal level 2 Divide 3, the L-type gap and mushroom gap radiation face 4 of loading in parallel, coplanar wave guide feedback part 3 includes two parallel signals Transmit and be loaded with the first L-type gap 7, another letter on gap 5 and central metal conduction band 6, bars transmission gap 5 therein The middle part in number transmission gap 5 is disconnected, and the second L-type gap 8 symmetrical above and below and the 3rd L-type are loaded with respectively disconnecting position end Gap 9, signal will be coupled to the 3rd L-type gap 9 by the second L-type gap 8 here, while both signals will have 180 ° of phases Difference, therefore the second L-type gap 8 and the 3rd L-type gap 9 constitute 180 ° of phase shifters, the first L-type gap 7 and the second L-type gap 8 with The center line of central metal conduction band 6 is that symmetry axis is symmetrical, and central metal conduction band 6 extends to mushroom gap radiation face 4 It is internal and semicircle conduction band 10 is loaded with the end of central metal conduction band 6.

As shown in figure 1, described medium substrate 1 uses Rogers R4003C, its length L to be 28mm, width W is 24mm, Thickness is 0.8mm, and metal level 2 is copper, and the thickness of metal level 2 is 18 μm.As indicated with 2, the described length of coplanar wave guide feedback part 3 L1=6mm, the width W1 of central metal conduction band 4=2.3mm, the signal transmission width g1 of gap 5=0.15mm, the length of the second L-type gap 8 L6=7mm, the bending part length L7 of the 3rd L-type gap 9=3.8mm, the first L-type gap 7 and the width g2 of the second L-type gap 8= Mushroom gap radiation face 4 is arrived in width W2=1.8mm of metal conduction band between 0.15mm, 180 ° of phase shifters, the first L-type gap 7 Apart from L2=7mm, central metal conduction band 5 extends to the length L3=3.2mm in mushroom gap radiation face 4, semicircle conduction band 10 Radius L4=3.6mm, the end of mushroom gap radiation face 4 away from signal transmit the end of gap 5 length L5=10.8mm.

The return loss plot of the three frequencies slot antenna as shown in figure 3, in 2.49-2.73GHz, 3.48-3.89GHz and S is met in 5.49-6.39GHz frequency range₁₁<- 10dB requirement.VSWR（Voltage standing wave ratio）Curve as shown in figure 4, 2.52-2.73GHz, meet VSWR at 3.5-3.8GHz and 5.5-6.39GHz<2 requirement.Fig. 5 and Fig. 6 sets forth The E faces of three frequency slot antennas and H faces directional diagram under 3.6GHz.

In summary, the utility model proposes three frequency slot antenna configurations are simple, compact dimensions, be easily integrated, be easy to Process and antenna performance is excellent, be highly suitable to be applied for WiMAX mobile communication terminal.

General principle of the present utility model, principal character and advantage has been shown and described above, it is new not departing from this practicality On the premise of type spirit and scope, the utility model also has various changes and modifications, and these changes and improvements both fall within requirement and protected The scope of the present utility model of shield.

Claims (3)

1. a kind of three-frequency antenna applied to WiMAX wave bands, includes the medium substrate of one side coating metal layer, it is characterised in that： Coplanar wave guide feedback part, the L-type gap and mushroom gap radiation face of loading in parallel are etched with described metal level, it is coplanar Waveguide feed part is included on two parallel signal transmission gaps and central metal conduction band, bars transmission gap therein The first L-type gap of end short circuit is loaded with, the middle part in another bars transmission gap disconnects, disconnects the end difference at position The the second L-type gap and the 3rd L-type gap of end short circuit are loaded with, the second L-type gap and the 3rd L-type gap constitute 180 ° of shiftings Phase device, the first L-type gap and the second L-type gap are using the center line of central metal conduction band as symmetrical axial symmetry, central metal conduction band Extend to the inside in mushroom gap radiation face and be loaded with semicircle conduction band in its end.

2. the three-frequency antenna according to claim 1 applied to WiMAX wave bands, it is characterised in that：Described medium substrate Using Rogers R4003C, its length L is 28mm, and width W is 24mm, and thickness is 0.8mm, and metal level is copper, metal layer thickness For 18 μm.

3. the three-frequency antenna according to claim 1 applied to WiMAX wave bands, it is characterised in that：Described co-planar waveguide Feed section length L1=6mm, central metal conduction band width W1=2.13mm, signal transmission gap width g1=0.15mm, L-type seam Between gap length L6=7mm, L-type slit bends partial-length L7=3.8mm, L-type gap width g2=0.15mm, 180 ° of phase shifters Metal conduction band width W2=1.8mm, L-type gap to mushroom gap radiation face is apart from L2=7mm, the extension of central metal conduction band To the length L3=3.2mm in mushroom gap radiation face, radius L4=3.6mm of semicircle conduction band, mushroom gap radiation face end Hold length L5=10.8mm that gap end is transmitted away from signal.