CN208939137U - Antenna system - Google Patents

Abstract

The utility model provides a kind of antenna system, antenna system includes shell and is set to the intracorporal antenna of shell, antenna includes medium substrate and two radiation groups being set on medium substrate, each radiation group includes at least two radiators, radiator includes multiple axial patches of the multilayer radial direction patch being spaced apart along the axis direction of antenna system and connection adjacent radial patch, the connection direction of multilayer radial direction patch and multiple axial patches formed radiator around to, the radiator of different radiation groups around to opposite.The technical program, each radiator are formed by connecting by radial patch and axial patch, each radial direction patch energy radiation signal, it is compact-sized, the size requirement of low profile antenna system can either be met, and the transmission of low frequency signal can be applicable in, advantageously reduce the energy loss of signal.Meanwhile the radiator of different radiation groups around to making the polarization direction of radiation group different on the contrary, forming the radiation group of transmitting signal and receive the polarization isolation of the radiation group of signal.

Description

Antenna system

Technical field

The utility model relates to radio distance-measuring technical field more particularly to a kind of antenna systems.

Background technique

In compact radio distance-measuring equipment, meet small size require when also require antenna system can emit simultaneously and Receive radio signal.In order to reduce transmitting signal to received influence, traditional solution includes three kinds, first is that will receive Antenna system and transmitting antenna system separate, and are two independent antenna systems, carry out space transceiver insulation.Second is that if transmitting With receive frequency use different working frequencies, then receive and transmitting antenna system use an antenna system, carry out frequency every From.The program, which needs to receive and dispatch, uses different frequencies, is only suitable only for communicating, is not suitable for radio distance-measuring, because of distance measuring signal one It surely is transmit-receive cofrequency rate.Third is that using time division way, when emitting signal, close receiver, transmitting signal be duty ratio be less than 10% ranging burst signal below, to reduce influence of the powerful transmitting signal to receiver.The signal energy of which Amount utilization efficiency is poor, and anti-interference ability is poor.

Utility model content

The main purpose of the utility model is to provide a kind of antenna system, it is intended to solve low profile antenna system in the prior art Signal energy utilization rate is low and problem that receive-transmit isolation is poor.

To achieve the above object, the utility model proposes antenna system, the antenna system includes shell and being set to The intracorporal antenna of shell, the antenna include medium substrate and two radiation groups being set on the medium substrate, each Radiation group includes at least two radiators, and the radiator includes being spaced apart along the axis direction of the antenna system Multilayer radial direction patch and the multiple axial patches for connecting the adjacent radial patch, radial direction patch and multiple axis described in multilayer To the connection direction of patch formed the radiator around to, the radiator of the different radiation groups around to opposite.

Preferably, the radial patch includes the first side being sequentially connected end to end, second side, third side and the 4th Side, the first side is opposite with the third side, and the second side is opposite with the four side, the 4th side While the axis close to the antenna system is arranged, the second side is arranged far from the axis of the antenna system, same radiation Adjacent two of the body axial patch is connected respectively in the first side of the same radial patch and described Third side.

Preferably, the four side and the second side are continuous zigzag.

Preferably, the radiator around the center of the medium substrate, circumferentially arrange by array, and the different radiation The radiator of group is successively spaced setting.

Preferably, the antenna further includes feeder line and the phase shift feeding network that is set on the medium substrate, the shifting Phase feeding network include two connectivity ports, input port and output port, wherein a radiation group by the feeder line with One of them described connectivity port connection, another radiation group are connect by the feeder line with connectivity port described in another, The output port is used for transmission transmitting signal, and the input port transmission receives signal.

Preferably, the phase shift feeding network includes the first conductor band and the second conductor band, the first conductor band and institute It states and is provided with isolation strip between the second conductor band, the connectivity port and the input are provided on the first conductor band Port is provided with another connectivity port and the output port on the second conductor band, and the connectivity port is extremely It include less two subports, radiator of the subport respectively with the same radiation group connects one to one, and each institute Stating the conductor strip length between subport is quarter-wave.

Preferably, the antenna system further includes being set to the intracorporal rf board of the shell and baseband board, the antenna, institute State rf board, the baseband board is sequentially connected electrically, and the rf board and the baseband board are close to medium substrate setting.

Preferably, it is provided with pedestal in the shell, step surface, the antenna, the radio frequency are provided on the pedestal Plate, the baseband board are set in turn on the step surface.

Preferably, supporter is filled between the medium substrate and the radiator, the supporter wraps up the spoke Beam, the dielectric constant of the supporter are 2.0-12.

Preferably, the outer diameter of the antenna system is 25-30mm.

Preferably, the applicable signal in band of the antenna system is L-band.

It is formed by connecting in each radiator of the technical program by radial patch and axial patch, each radial direction patch can spoke Signal is penetrated, it is compact-sized, the size requirement of low profile antenna system can either be met, and the transmission of low frequency signal can be applicable in, favorably In the energy loss for reducing signal.Meanwhile the connection direction of multiple radial patches and axial patch formed radiator around to no With radiation group radiator around to enabling the polarization direction difference of radiation group to be used to receive and emit oppositely oriented on the contrary Circularly polarised wave, formed transmitting radiation group and receive radiation group polarization isolation so that antenna system with frequency simultaneously transmitting-receiving and Transceiver insulation.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the perspective view of the explosion of antenna system in the utility model embodiment；

Fig. 2 is the structural schematic diagram of antenna in the utility model embodiment；

Fig. 3 is the structural schematic diagram at another visual angle of antenna in the utility model embodiment；

Fig. 4 is the partial structural diagram of antenna in the utility model embodiment.

Drawing reference numeral explanation:

Label	Title	Label	Title
				10	Antenna system	140	Phase shift feeding network
100	Antenna body	141	First conductor band
				110	Medium substrate	142	Second conductor band
120	Radiator	143	Connectivity port
				121	Radial patch	144	Output port
1211	First side	145	Input port
				1212	Second side	150	Isolation strip
1213	Third side	160	Supporter
				1214	Four side	200	Pedestal
122	Axial patch	300	Rf board
				130	Feeder line	400	Baseband board

The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, fall within the protection scope of the utility model.

It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.

In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and cannot manage Solution is its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " the One ", the feature of " second " can explicitly or implicitly include at least one of the features.It is " more in the description of the present invention, It is a " it is meant that at least two, such as two, three etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. should do broad sense reason Solution, for example, " fixation " may be a fixed connection, may be a detachable connection, or integral；It can be mechanical connection, it can also To be electrical connection；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary Or the interaction relationship of two elements, unless otherwise restricted clearly.It for the ordinary skill in the art, can be with The concrete meaning of above-mentioned term in the present invention is understood as the case may be.

It in addition, the technical solution between each embodiment of the utility model can be combined with each other, but must be with ability Based on domain those of ordinary skill can be realized, it will be understood that when the combination of technical solution appearance is conflicting or cannot achieve The combination of this technical solution is not present, also not within the protection scope of the requires of the utility model.

The main purpose of the utility model is to provide a kind of antenna system, it is intended to solve low profile antenna system in the prior art Capacity usage ratio is low and problem that receive-transmit isolation is poor.

Please refer to shown in Fig. 1, Fig. 2 and Fig. 3, in an embodiment of the present invention, antenna system 10 include shell and The intracorporal antenna 100 of shell is set, antenna 100 includes medium substrate 110 and two radiation groups being set on medium substrate 110, Each radiation group include at least two radiators 120, radiator 120 include along antenna 100 axis direction be spaced apart it is more Multiple axial patches 122 of the radial patch 121 of layer and connection adjacent radial patch 121, multilayer radial direction patch 121 and multiple axial directions The connection direction of patch 122 formed radiator 120 around to, the radiator 120 of different radiation groups around to opposite.

It should be noted that being differently formed radiator according to the initial position that axial patch 122 connects radial patch 121 120 around to.With radial patch 121 for three layers, for axial patch 122 is two, and adjacent axial patch 122 is connected to together On two opposite sides of one radial patch 121.The connection of radial patch 121 and axial patch 122 is formed with positive S type and anti-S Two kinds of situations of type, when emitting and receiving left-hand circular polarization wave in positive S type radiator 120, when being in anti-S type, radiator 120 emits With receive right-handed circular polarization wave, since left-hand circular polarization antenna 100 cannot receive right-handed circular polarization wave, therefore the knot of radiator 120 Structure helps to realize polarization isolation.In addition, the shape of radial patch 121 can be triangle, quadrangle or abnormally-structured, only It wants on the relative side that the axial patch 122 of adjacent two can be made to be respectively arranged at same radial patch 121, as long as So that adjacent two axial patches 122 are or not on the straight line that same is parallel to axis, both two neighboring axial patches 122 It is not overlapped in the projection of radial patch 121, and there are a fixed spacings.

In the present embodiment, the connection direction of radial patch 121 and axial patch 122 formed the radiator 120 around To, be not belonging to the radiator 120 of same radiation group around on the contrary, belong to the radiator 120 of same radiation group around to identical, It causes the polarization direction of radiation group to be differently formed polarization isolation, realizes that the signal transmitting and receiving between radiation group realizes isolation.It needs Bright, the radio signal that receiving antenna 100 receives includes the self-interference signal and distant object reflection letter of own transmission Number.The signal strength of own transmission is often much larger than reflection signal, it is possible to can burn the low-noise amplifier etc. of receiver Electronic circuit, it is therefore necessary to which reduction receiving antenna 100 as far as possible receives own transmission signal.Meanwhile in order to improve detection range, Improve the signal-to-noise ratio of echo-signal, it is also desirable to reduce self-interference signal intensity.Two above demand is required to improve antenna 100 Receive-transmit isolation, and the present embodiment by make adjacent radiator 120 around to being right up to polarization isolation on the contrary Effect.

In the present embodiment, each radiator 120 is formed by connecting by radial patch 121 and axial patch 122, each radial direction The energy radiation signal of patch 121, multilayer radiating surface not only meet electrical length requirement, additionally it is possible to meet the size of small size antenna 100 It is required that being applicable in the transmission of low frequency signal, the energy loss of signal is advantageously reduced.The antenna 100 of the utility model meets small ruler Very little requirement, and low frequency circularly polarized signal can be received and dispatched simultaneously, advantageously reduce energy loss.The antenna 100 of the utility model is suitable 5GHZ low frequency signal below is closed, such as the signal of L-band.Technical solution in the present embodiment is suitable for manufacture small size antenna 100, And preferably 100 external diametrical extent of small size antenna is 25 to 30mm.

In other embodiments, the radiator 120 of different radiation groups around to can be identical.When the radiation of different radiation groups Body 120 around to it is identical when, then radiator around to all the same, can all receive signal or all emit letter Number.

Preferably, the number of plies of radial post-chip is four layers, and the quantity of axial patch 122 is three.Radial patch 121 and antenna 100 axis is vertical, so that the electromagnetic wave that antenna 100 emits carries out direction along the axis direction of antenna 100.It needs to illustrate It is that radial patch 121 is the main radiating surface of antenna 100, and the setting of multilayer radial direction patch 121 can be interior most in a limited space Setting radiating surface more than possible extends electrical length to realize the transmitting-receiving of low frequency signal.Low frequency signal is 5GHZ wave below herein Section.

Further, referring to Fig. 1, radial patch 121 includes first side 1211, the second side being sequentially connected end to end 1212, third side 1213 and four side 1214, first side 1211 and third side 1213 are opposite, second side 1212 with Four side 1214 is opposite, and four side 1214 is arranged close to the axis of antenna 100, and second side 1212 is far from antenna 100 Axis setting, the axial patch 122 of adjacent two of same radiator 120 is connected respectively in same radial patch 121 First side 1211 and third side 1213 on.It is understood that the same layer radial direction patch 121 of adjacent radiation body 120 Between there are certain intervals, the size in gap is changeable according to the size of required electrical length, herein without limit.Using four The radial patch 121 of side shape advantageously allows antenna 100 and is adapted to very wide wave band.

Further, any point being equidistant to 100 axis of antenna on the second side 1212 of radial patch 121, the The axis of any point to antenna 100 is equidistant on four side 1214.Both illustrated, the second side 1212 of radial patch 121 It is arc-shaped with four side 1214, and the center of circle is on the axis of antenna 100.The design of this structure helps antenna 100 Adapt to broader wave band.

Further, referring to figs. 2 and 3, in order to enable antenna 100 have ultra wideband, the second of radial patch 121 Side 1212 and four side 1214 are continuous zigzag, and both second side 1212 and four side 1214 were by multiple saws Tooth unit is formed by connecting.In the present embodiment, the bandwidth that antenna 100 is able to achieve is at least 400MHz.The formation of sawtooth is preferably four Side shape can also be in other embodiments trapezoidal, triangle etc., and this will not be repeated here.

In a preferred embodiment, center circumferentially array cloth of the radiator 120 of two radiation groups around medium substrate 110 It sets, and the radiator 120 of different radiation groups is successively spaced setting.Such as when each radiation group includes two radiators 120, four A 120 circumference display arrangement of radiator, and radiator facing each other 120 is used as a radiation group, is capable of forming field pattern complementation, into One step reduces installation space, adapts to the size requirement of small size antenna 100.In other embodiments, belong to the spoke of same radiation group The quantity of beam 120 can also be three and three or more, and the radiator 120 of two radiation groups is successively disposed adjacent.Both The radiator 120 of one radiation group, the radiator 120 of the second radiation group, the radiator 120 of the first radiation group, the second radiation group The mode of radiator 120... is disposed adjacent, and is capable of forming field pattern complementation.

Further, referring to Fig. 3 and Fig. 4, antenna 100 further includes feeder line 130 and the phase shift that is set on medium substrate 110 Feeding network 140, phase shift feeding network 140 include two connectivity ports 143, input port 145 and output port 144.The same day When line 100 is realized while being received and dispatched, wherein a radiation group is connect by feeder line 130 with one of connectivity port 143, another radiation Group is connect by feeder line 130 with another connectivity port 143, and output port 144 is used for transmission transmitting signal, input port 145 It is used for transmission reception signal.The connectivity port 143 wherein connecting with the first radiation group is No. 4 ports, is connect with the second radiation group Connectivity port 143 be No. 3 ports, be used for transmission transmitting signal output port 144 be No. 1 port, be used for transmission reception letter Number input port 145 be No. 2 ports.In other embodiments, when two radiation groups around to it is identical when, phase shift feeding network 140 input port 145 or output port 144 all connects each radiator by connectivity port 143, is fed by phase shift The phase shift effect or combining effect of network 140 are so that antenna only emits signal or only receives signal.Therefore, it can be seen that this The antenna of utility model around to situation, can be realized antenna in conjunction with phase shift feeding network 140 and only receive or only according to radiator 120 Hair or simultaneously receiving and transmitting signal.

At this point, signal projector issue transmitting signal after No. 1 port transmission to phase shift feeding network 140, in phase shift Under the phase shift effect of feeding network 140, it is respectively formed two that phase difference is 90 ° and range signals is waited to be transmitted to the first radiation group Two radiators 120, so that two radiation synthesis circularly polarised waves of radiator 120 are launched.When the second radiation group receives When to transmitting circularly polarised wave through reflected reflection circularly polarised wave, the second radiation group around to reflection circle can be received on the contrary Polarized wave, and induce equivalent current signal.At this point, two radiators 120 of the second radiation group are respectively induced out phase difference is 90 ° of current signal is combined to form reception signal after phase shift feeding network 140 No. 2 ports, and through No. 2 port transmissions To signal receiver.The antenna of the present embodiment can emit left-hand circular polarization wave and receive dextrorotation entelechy due to that can receive and dispatch with frequency Change wave or transmitting right-handed circular polarization wave and receive left-hand circular polarization wave, can be applied to ranging field.

Preferably, referring to fig. 4, phase shift feeding network 140 includes the first conductor band 141 and the second conductor band 142, and first leads It is provided with isolation strip 150 between body band 141 and the second conductor band 142, the first conductor band 141 and the second conductor band is isolated Effect of signals between 142.Connectivity port 143 and input port 145, the second conductor band 142 are provided on first conductor band 141 On be provided with connectivity port 143 and output port 144.Two connectivity ports 143 include at least two subports, same connection The subport of port 143 connects one to one respectively at the radiator 120 of same radiation group, and the phase of same connectivity port 143 Conductor strip length between adjacent subport is quarter-wave, so that the signal phase difference of two neighboring subport is 90 °, Realize transmitting circular polarisation.

It is understood that the quantity of the radiator 120 of same radiation group can also be 3 or 4, and corresponding first The subport quantity of conduction band body 141 and/or the connectivity port 143 on the second conduction band body 142 is 3 or 4.Same conduction band body When the signal phase difference transmitted between adjacent subport is 90 °, the transmitting or reception of circularly polarised wave can be achieved with.

Preferably, the shape of the first conductor band 141 and the second conductor band 142 is arc, and isolation strip 150 is annular isolation band 150, the first conductor band 141 is set to the internal or external of isolation strip 150, and the second conductor band 142 is set to the outer of isolation strip 150 Portion or inside.In other embodiments, the first conductor band 141 and the second conductor band 142 can also be bar shaped, and isolation strip 150 is Bar shaped, the first conductor band 141 are set to the side of isolation strip 150, and the second conductor band 142 is set to the other side of isolation strip 150.

In the present embodiment, using isolation strip 150 realize the signal between the first conductor band 141 and the second conductor band 142 every From, and adjacent radiation body 120 around the isolation having to difference so that antenna 100 has better receive-transmit isolation.? In other embodiments, there can also be phase shift using other types and be combined the phase shift feeding network 140 of function, such as 3DB electric bridge.

It should be noted that medium substrate 110 is pcb board, the first conductor band 141, the second conductor band 142, isolation strip 150 Preferably metal material, such as copper.

In addition, referring to fig. 2, supporter 160 is filled between medium substrate 110 and radiator 120, supporter 160 is wrapped up Radiator 120 provides support force for radiator 120.Supporter 160 is made of high frequency material, preferably dielectric constant be 2.0 to 12 material advantageously reduces loss of signal of the signal through supporter when such as glass fibre and resin material.

Referring to Fig. 1, antenna system 10 further includes being set to the intracorporal rf board 300 of shell and baseband board 400, antenna, radio frequency Plate 300, baseband board 400 are successively disposed adjacent, and are electrically connected between antenna 100 and rf board 300, baseband board 400 and rf board It is electrically connected between 300, rf board 300 and the side for being all set in close medium substrate 110.It is understood that baseband board 400 It is arranged on the step of pedestal 200, rf board 300 is arranged on baseband board 400, and antenna 100 is arranged on rf board 300.Radio frequency Signal transmitting and/or signal receiving circuit are provided on plate 300, emission of radio frequency signals is by antenna transmission to space and/or leads to It crosses antenna and receives the signal from the external space, it is to be understood that the transmitting signal that rf board 300 issues passes through output end oral instructions It is defeated by antenna, antenna receives reception signal and is transmitted to rf board 300 by input port.300 received signal of rf board passes It is defeated by baseband board 400, and carries out processing analysis via baseband board 400, realizes the function of ranging.The utility model proposes antenna System 10 can also be applied to Intelligent logistics and sort field.

Further, it is provided with pedestal in the shell, step surface, antenna 100, rf board are provided on the pedestal 300, baseband board 400 is set in turn on the step surface, and baseband board 400 is arranged close to step surface.Pedestal is intracorporal in shell Mounting structure does not limit, as long as unit Europe can be made to be immobilized in the shell.If shell includes upper casing and lower casing, pedestal 200 are fastened between upper casing and lower casing, and such segmentation structure is also beneficial to install.In other embodiments, shell can be with Other structures are taken, herein without limiting.

Pedestal 200 is metal material, such as aluminium alloy or copper alloy, can be good at support using metal base and protects Protect entire antenna system 10.Shell is preferably plastic material, and convenient for the transmission of electromagnetic wave, such as ABS plastic, and preferably dielectric is normal Plastic materials of the number less than 12, it is main protect antenna and other be located at the component of enclosure interior.

Upper is only the preferred embodiment of the utility model, and therefore it does not limit the scope of the patent of the utility model, it is all Under the utility model design of the utility model, equivalent structure transformation made based on the specification and figures of the utility model, Or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims (9)

1. a kind of antenna system, which is characterized in that the antenna system includes shell and is set to the intracorporal antenna of the shell, institute Two radiation groups that antenna includes medium substrate He is set on the medium substrate are stated, each radiation group includes at least two spokes Beam, the radiator include the multilayer radial direction patch being spaced apart along the axis direction of the antenna system and the adjacent institute of connection Multiple axial patches of radial patch are stated, described in the connection direction of radial direction patch described in multilayer and multiple axial patches is formed Radiator around to, the radiator of the different radiation groups around to opposite.

2. antenna system as described in claim 1, which is characterized in that the radial direction patch includes first be sequentially connected end to end Side, second side, third side and four side, the first side is opposite with the third side, the second side Opposite with the four side, the four side is arranged close to the axis of the antenna system, and the second side is far from institute The axis setting of antenna system is stated, adjacent two of the same radiator axial patch is connected respectively in same described The first side of radial patch and the third side.

3. antenna system as claimed in claim 2, which is characterized in that the four side and the second side are continuous Zigzag.

4. antenna system as claimed any one in claims 1 to 3, which is characterized in that the radiator surrounds the medium Circumferentially array is arranged at the center of substrate, and the radiator of the different radiation groups is successively spaced setting.

5. antenna system as claimed any one in claims 1 to 3, which is characterized in that the antenna further includes feeder line and sets The phase shift feeding network being placed on the medium substrate, the phase shift feeding network include two connectivity ports, input port and Output port, wherein a radiation group is connect by the feeder line with connectivity port described in one of them, another radiation Group is connect by the feeder line with connectivity port described in another, and the output port is used for transmission transmitting signal, the input Port transmission receives signal.

6. antenna system as claimed in claim 5, which is characterized in that the phase shift feeding network includes the first conductor band and the Two conductor bands are provided with isolation strip, are arranged on the first conductor band between the first conductor band and the second conductor band There are the connectivity port and the input port, another connectivity port and described is provided on the second conductor band Output port, and the connectivity port includes at least two subports, the subport respectively with the same radiation group Radiator connects one to one, and the signal phase difference of the adjacent subport transmission is 90 °.

7. antenna system as claimed any one in claims 1 to 3, which is characterized in that the outer diameter of the antenna is 25- 30mm, and the signal in band that the antenna is applicable in is L-band.

8. antenna system as claimed any one in claims 1 to 3, which is characterized in that the antenna system further includes setting In the intracorporal rf board of the shell and baseband board, the antenna, the rf board, the baseband board are sequentially connected electrically, and described Rf board and the baseband board are close to the medium substrate setting.

9. antenna system as claimed in claim 8, which is characterized in that be provided with pedestal in the shell, set on the pedestal It is equipped with step surface, the antenna, the rf board, the baseband board are set in turn on the step surface.