CN206480761U - Plane multi-frequency antenna - Google Patents

Abstract

The utility model discloses a kind of plane multi-frequency antenna, include the medium substrate of single layer coating metal level, coplanar waveguide feeder line is etched with metal level, impedance matching detail and two symmetrical right angle bending line of rabbet joint detail radiating surfaces, the line of rabbet joint detail of end short circuit is loaded with two symmetrical radiating surfaces, impedance matching detail is the slot line structure of terminal open circuit, the impedance matching detail parallel connection is carried on the middle conduction band of coplanar waveguide feeder line, two bars transmission gap end away from coplanar waveguide feeder line input is connected with two symmetrical right angle bending line of rabbet joint detail radiating surfaces respectively.The utility model is simple in construction, it is easy to process, and antenna performance is excellent, is highly suitable to be applied in cordless communication terminal system.

Description

Plane multi-frequency antenna

Technical field

The utility model belongs to wireless telecommunications system technical field, and in particular to a kind of plane multi-frequency antenna.

Background technology

With developing rapidly for wireless technology, related communication apparatus becomes more diverse.At present, device for mobile communication into The daily necessities carried with for people, such as notebook computer, mobile phone, personal digital assistant.These electronic products are logical Cross antenna transmitting and receive radio wave and carry out the transmission of signal with exchanging.LET（Long Term Evolution, for a long time Evolution）The implementation of technology so that wireless telecommunication system must support MIMO technique, i.e. related electronic product to pass through Multigroup antenna transmitting/receiving wireless signal, to increase the handling capacity and transmitting range of data.Multigroup antenna often makes electronic product more Plus it is heavy, and traditional single-band antenna can not meet the demand of LET communications.And with the propulsion of LET technologies, band requirement is more next More, the frequency covered can be divided into 44 frequency ranges from minimum 698MHz to highest 3800MHz.Due to the scattered of frequency range and In a jumble, system industry person can still use multiple frequency ranges simultaneously even in areal.In this case, how to design and meet transmission The antenna of demand, while taking into account multiband, miniaturization, planar structure and easy of integration etc., it has also become one of target that industry is made great efforts.

The content of the invention

The technical problem that the utility model is solved there is provided one kind and cover multiple frequency ranges, and have low cost, structure letter concurrently The plane multi-frequency antenna of the features such as single, miniaturization, high-gain and function admirable, the multifrequency antenna uses coplanar wave guide feedback, its Mode is simple, and is loaded with impedance matching network so that the size of antenna is substantially smaller than same type antenna size.

The utility model adopts the following technical scheme that plane multi-frequency antenna, including individual layer apply to solve above-mentioned technical problem The medium substrate of metal-clad, it is characterised in that：Be etched with described metal level coplanar waveguide feeder line, impedance matching detail and Two symmetrical right angle bending line of rabbet joint detail radiating surfaces, two symmetrical right angle bending line of rabbet joint detail end short circuits, Impedance matching detail is the slot line structure of terminal open circuit, and the centre that the impedance matching detail parallel connection is carried in coplanar waveguide feeder line is led Take, the two bars transmission gap end away from coplanar waveguide feeder line input is bent with two symmetrical right angles respectively Line of rabbet joint detail radiating surface is connected.

Further preferably, described multifrequency antenna is fed using single port, the middle conduction band of coplanar waveguide feeder line, two letters Number transmission gap and the ground on both sides collectively form feed port.

Further preferably, described two symmetrical right angle bending line of rabbet joint detail radiating surfaces include coming two symmetrically The right angle bending type line of rabbet joint detail of 5 times and load on the line of rabbet joint detail of the end short circuit between adjacent right angle bending detail back and forth and be total to With generation 0.92-0.94GHz, 2.3-2.33GHz, 3.42-3.48GHz, 4.4-4.46GHz, 5.72-5.8GHz, 7.86-8GHz Frequency range.

Further preferably, length L=16.8mm of described medium substrate, width W=12.05mm, thickness h=0.8mm are situated between The material of matter substrate is Rogers R4003C, and dielectric constant is 3.38, and metal level is copper, and the thickness of metal level is 0.017mm.

Further preferably, length LX=15.2mm of described coplanar waveguide feeder line, wherein the length for feeder line is 6mm, Width W1=2.3mm of middle conduction band, signal transmits the width g1=0.15mm in gap, and parallel connection is carried in the middle of coplanar waveguide feeder line Length L1=2mm of the line of rabbet joint detail of the terminal open circuit of conduction band, its signal transmission gap width g2=0.15mm, its end is away from coplanar Waveguide feeder input apart from L2=6mm, transmit two symmetrical right angles that gap is connected with the bars of coplanar waveguide feeder line two Length L3=12.8mm of line of rabbet joint detail radiating surface is bent, its end is away from coplanar waveguide feeder line input apart from L4=3mm, right angle Width g3=0.15mm that line of rabbet joint detail signal transmits gap is bent, the end that the loading of line of rabbet joint detail radiating surface is bent at right angle is short Length L5=12mm of the line of rabbet joint detail on road, its two ends is far from right angle bending line of rabbet joint detail apart from W3=0.57mm, and two symmetrical Right angle bends line of rabbet joint detail away from ground level size L6=1mm at coplanar waveguide feeder line input port direction, and it is along length side To ground level L7=1mm.

Compared with prior art, the utility model has the following advantages：The antenna that the utility model is provided covers copper using one side Medium substrate is made, and overall structure can be processed using traditional PCB technology and realized, with low cost, and the utility model is provided Antenna using detail bend meander technology, two bending type radiating surfaces substantially reduce the size of antenna without ground level, whole The size of individual medium substrate is only 12*15.8mm, thus the utility model proposes multifrequency antenna realize miniaturization, and feed Simply, therefore with very high use value.

Brief description of the drawings

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

Fig. 2 is Fig. 1 side view；

Fig. 3 is overall structure size marking figure of the present utility model；

Fig. 4 is for S of the present utility model₁₁Curve result of calculation；

Fig. 5 is VSWR of the present utility model（Voltage standing wave ratio）As a result.

In figure：1st, medium substrate, 2, metal level, 3, coplanar waveguide feeder line, 4, impedance matching detail, 5, the right angle bending line of rabbet joint Detail radiating surface, 6, the line of rabbet joint detail of end short circuit, 7, middle conduction band, 8, signal transmission gap.

Embodiment

Particular content of the present utility model is described in detail with reference to accompanying drawing.As Figure 1-3, plane multi-frequency antenna, including list Coplanar waveguide feeder line 3, impedance matching detail 4 and two are etched with the medium substrate 1 of layer coating metal layer 2, described metal level 2 Individual symmetrical right angle bending line of rabbet joint detail radiating surface 5, is loaded with end short circuit on two symmetrical detail radiating surfaces Line of rabbet joint detail 6, impedance matching detail 4 is the slot line structure of terminal open circuit, and the parallel connection of impedance matching detail 4 is carried in co-planar waveguide On the middle conduction band 7 of feeder line 3 and the input away from coplanar waveguide feeder line 3, two letters away from coplanar waveguide feeder line 3 input Number transmission end of gap 8 is connected with two symmetrical right angles bending line of rabbet joint detail radiating surfaces 5 respectively.

Described multifrequency antenna is fed using single port, the bars of the middle conduction band 7 and two transmission seam of coplanar waveguide feeder line 3 Gap 8 and the ground of the both sides of coplanar waveguide feeder line 3 collectively form feed port；Two described symmetrical right angle bending line of rabbet joint branch Section radiating surface 5 is two symmetrical 5 right angle bending type line of rabbet joint details back and forth and loads on the adjacent right angle bending type line of rabbet joint Between detail end short circuit line of rabbet joint detail 6, these details generate jointly 0.92-0.94GHz, 2.3-2.33GHz, 3.42-3.48GHz, 4.4-4.46GHz, 5.72-5.8GHz, 7.86-8GHz frequency range.

Length L=16.8mm of described medium substrate 1, width W=12.05mm, thickness h=0.8mm, medium substrate 1 Material is Rogers R4003C, and dielectric constant is 3.38, and metal level 2 is copper, and the thickness of metal level 2 is 0.017mm；Described is total to Length LX=15.2mm of coplanar waveguide transmission line, including the L2 parts for feeder line, its length is 6mm, middle conduction band 7 Width W1=2.13mm, signal transmits the width g1=0.15mm in gap 8, and parallel connection is carried in the middle conduction band 7 of coplanar waveguide feeder line 3 Length L1=2mm of the line of rabbet joint detail 6 of terminal open circuit, its signal transmits the width g2=0.15mm in gap, and its end is away from coplanar ripple Lead the input of feeder line 3 apart from L2=6mm, two be connected with the two bars transmission gap 8 of coplanar waveguide feeder line 3 are symmetrically Length L3=12.8mm of right angle bending line of rabbet joint detail radiating surface 5, its end away from the input of coplanar waveguide feeder line 3 apart from L4= 3mm, right angle bending line of rabbet joint detail signal transmits the width g3=0.15mm in gap, and at right angle, bending line of rabbet joint detail radiating surface 5 is loaded End short circuit line of rabbet joint detail 6 length L5=12mm, its two ends far from right angle bend line of rabbet joint detail apart from W3=0.57mm, two Ground level size L6=1mm of the individual symmetrical right angle bending line of rabbet joint detail at the remote input port direction of coplanar waveguide feeder line 3, Its ground level L7=1mm along its length.

The S of the multifrequency antenna₁₁Curve result of calculation is as shown in figure 3, in 0.92-0.94GHz, 2.3-2.33GHz, 3.42- S is met in 3.48GHz, 4.4-4.46GHz, 5.72-5.8GHz and 7.86-8GHz frequency range₁₁≤ -10dB requirement.

The VSWR curves of the multifrequency antenna are as shown in figure 4, in 0.92-0.94GHz, 2.3-2.33GHz, 3.42-3.48GHz And meet VSWR in 4.4-4.46GHz frequency ranges<2 requirement.

The utility model proposes multifrequency antenna using detail meander technology, add the resonance point of antenna, realize many The characteristic of frequency antenna, and right angle bending line of radiation face is almost not required to ground level, substantially reduces the overall dimensions of antenna, its is big Small is only 15*12mm.In summary, the utility model is simple in construction, it is easy to process, and antenna performance is excellent, is especially suitable for application In cordless communication terminal system.

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 (5)

1. plane multi-frequency antenna, includes the medium substrate of single layer coating metal level, it is characterised in that：Etched on described metal level There are coplanar waveguide feeder line, impedance matching detail and two symmetrical right angle bending line of rabbet joint detail radiating surfaces, two mutually right The right angle bending line of rabbet joint detail end short circuit of title, impedance matching detail is the slot line structure of terminal open circuit, the impedance matching detail Parallel connection is carried on the middle conduction band of coplanar waveguide feeder line, the two bars transmission gap end away from coplanar waveguide feeder line input End is connected with two symmetrical right angle bending line of rabbet joint detail radiating surfaces respectively.

2. plane multi-frequency antenna according to claim 1, it is characterised in that：Described multifrequency antenna is presented using single port Electricity, middle conduction band, two bars transmission gap and the ground on both sides of coplanar waveguide feeder line collectively form feed port.

3. plane multi-frequency antenna according to claim 1, it is characterised in that：Two described symmetrical right angle bendings Line of rabbet joint detail radiating surface includes carrying out two symmetrical right angle bending type line of rabbet joint details of 5 times back and forth and loads on adjacent right angle bending Between detail end short circuit line of rabbet joint detail produce jointly 0.92-0.94GHz, 2.3-2.33GHz, 3.42-3.48GHz, 4.4-4.46GHz, 5.72-5.8GHz, 7.86-8GHz frequency range.

4. plane multi-frequency antenna according to claim 1, it is characterised in that：The length L of described medium substrate= 16.8mm, width W=12.05mm, thickness h=0.8mm, the material of medium substrate is Rogers R4003C, and dielectric constant is 3.38, Metal level is copper, and the thickness of metal level is 0.017mm.

5. plane multi-frequency antenna according to claim 1, it is characterised in that：The length LX of described coplanar waveguide feeder line= 15.2mm, wherein for feeder line length be 6mm, width W1=2.13mm of middle conduction band, signal transmission gap width g1= 0.15mm, parallel connection is carried in length L1=2mm of the line of rabbet joint detail of the terminal open circuit of conduction band in the middle of coplanar waveguide feeder line, its signal Transmit gap width g2=0.15mm, its end away from coplanar waveguide feeder line input apart from L2=6mm, with coplanar waveguide feeder line two Length L3=the 12.8mm for two symmetrical right angles bending line of rabbet joint detail radiating surfaces that bars transmission gap is connected, its end away from Coplanar waveguide feeder line input apart from L4=3mm, right angle bending line of rabbet joint detail signal transmits the width g3=0.15mm in gap, Length L5=12mm of the line of rabbet joint detail of the end short circuit of right angle bending line of rabbet joint detail radiating surface loading, its two ends is bent far from right angle Line of rabbet joint detail apart from W3=0.57mm, two symmetrical right angles bending line of rabbet joint details are away from coplanar waveguide feeder line input port Ground level size L6=1mm at direction, its ground level L7=1mm along its length.