Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
  • H01Q5/30—Arrangements for providing operation on different wavebands
  • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
  • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
  • H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
  • H01Q9/04—Resonant antennas
  • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna

Definitions

• the invention relates to antennas and more particularly to an antenna and a method for multiport and multiband antennas capable of addressing several communications standards.
• This solution has the drawback of generating a significant space requirement or of limiting the number of operable communication standards depending on the size of the antenna device.
• a matching circuit is necessary to excite the different antennas appropriately.
• the use of this type of circuit has the disadvantage of operating only on a narrow frequency band inducing low radiation efficiency.
• MIMO multiple input and output systems
• Document EP2528158 describes a wireless reception system with a reconfigurable mechanical antenna to simultaneously support reception and transmission of signals.
• the reconfigurable mechanical antenna includes at least two antennas which can be mechanically reconfigured to cover different frequency ranges.
• a decoupling and matching network is used and electrically controlled to change the operating state with each change in the mechanical configuration of the antenna.
• EP2064774 describes a compact antenna tunable using different shapes of the radiating element and RF switches, duplexers and diplexers to tune the antenna to different desired frequencies.
• This solution requires the use of a control circuit to tune the antenna by controlling the switch circuit.
• EP 1776737 discloses a method using a circular flat antenna with a plurality of spatially distinct inputs. All ports resonate on the same frequency band which results in a particular MIMO configuration.
• the invention aims to solve this particular problem by proposing an antenna provided with a single radiating element configured to simultaneously receive and process signals from different communication technologies using different communication standards, without any configuration or adaptation network.
• An object of the invention proposes a multimode, multiport and multistandard antenna comprising a substrate on which is disposed a single planar radiating element, a plurality of communication ports connected to the radiating element each at a location distinct from the radiating element and intended to be coupled to different means of communication at the same time using different communication standards.
• the radiating element comprises an elliptical shape.
• the elliptical shape of the antenna according to the invention makes it possible to have a single radiating element capable of managing several accesses, each access being dedicated to a particular communication system with a particular communication standard, while having a natural isolation between these. standards, that is to say an absence of interference.
• This multiport and multistandard multimode antenna offers greater compactness and reduced mass than what exists and which can be applied without restriction to any multistandard communicating system.
• the elliptical shape of the antenna offers resonance at lower frequency and over a wider band compared to antennas with other planar geometric shapes (polygonal, circular).
• the antenna according to the invention does not need a configuration or adaptation network to operate, which makes it possible to simplify the architecture of the antenna, to reduce its size and to lighten it. .
• each location of the radiating element to which a communication port is connected preferably corresponds to a location where the radiation is maximum for a distinct resonance mode. other resonance modes for which a communication port is connected.
• the total current of the antenna is broken down into characteristic modes. These current modes are naturally orthogonal with respect to each other and are thus independent of each other.
• resonance mode is meant a characteristic mode of the current.
• Each characteristic mode is used around its resonant frequency to ensure that the antenna has a good match to its excitation port and that its radiating efficiency will be maximized.
• the ports are each placed at a location where the maximum current of the mode of interest is located, they are thus isolated from each other, no interference disturbing their transmission or reception of signals over their frequency range.
• the radiating element can be sized to support as many resonant modes as needed. Each of these modes can be energized by one port thus offering more than three ports.
• the dimension of the radiating element can vary depending on the minimum frequency of the radiation to be transmitted or received.
• the dimensions of the antenna are thus adjustable according to the desired use, that is to say according to the different communication standards with which one wishes to use it and the desired number of ports.
• the antenna may further include a ground track disposed on the substrate and electrically isolated from the radiating element, the track having an impedance suitable for a range of frequencies for a communication standard.
• the antenna can be dispensed with the use of an adaptation module or the like.
• the antenna can further comprise a feed line of the coplanar waveguide type to excite the radiating element. in different places which makes it possible to bring about an independent excitation of the different characteristic modes.
• the width of the feed line depends on the impedance of the communication port with the radiating element, and the distance between the feed line and the ground track depends on the desired bandwidth
• Another object of the invention provides a communication device comprising an antenna as defined above.
• Figure 1 shows schematically the concept of antenna architect according to the invention.
• Figure 2 shows a top view of a multimode, multiport and multistandard antenna according to one embodiment of the invention.
• FIG. 3A-3C Figures 3A, 3B and 3C show the current distribution on the surface of the radiating element of the antenna of Figure 2 for the first resonance mode, the fourth resonance mode and the ninth mode, respectively. resonance.
• Figure 1 shows schematically the concept of the antenna architect according to the invention.
• the multimode, multiport and multistandard antenna 1 comprises a single radiating element 2 and several ports, and more particularly three ports 3, 4 and 5 in the example illustrated in FIG. 1.
• the antenna 1 is connected to four communication modules 6, 7, 8 and 9 each having a different communication standard.
• Each port 3 through 5 is paired with each of the four modules 6 through 9.
• the first communication module 6 uses the telecommunication communication standard called in English “Long Term Evolution” and known by the abbreviation LTE
• the second communication module 7 uses the communication protocol wireless broadband Internet referred to as WiFi
• the third communication module 8 uses the third generation 3G telecommunication communication standards
• the fourth communication module uses the fifth generation radio access telecommunication standard, 5G NR.
• Figure 2 shows a top view of a multimode, multiport and multistandard antenna according to one embodiment of the invention.
• the antenna 1 comprises three ports 3, 4 and 5 as in the schematic representation of Figure 1.
• the multimode antenna comprises a substrate 10 on which is arranged the single radiating element 2.
• the radiating element 2 is a planar element, in other words two-dimensional, produced by depositing conductive material on the substrate 10 electrically. insulating. To allow its operation and thus isolate the ports from each other without having to resort to an adaptation network, the radiating element 2 has an elliptical shape.
• Each communication port 3, 4 and 5 is connected at a first end, denoted 30, 40 and 50 respectively, to the radiating element 2, each at a location of the radiating element 2 separate from the other ports.
• Each communication port 3, 4 and 5 comprises at a second end, denoted respectively 32, 42 and 52, a connection terminal making it possible to connect one or more cable (s) to connect the port to one or more communication modules 6 to 9.
• the total current of the antenna is broken down into characteristic modes.
• the current modes are naturally orthogonal with respect to each other and are thus independent of each other.
• each resonance mode has locations on radiation element 2 where the radiation is greatest. This current distribution is almost constant over the entire frequency band including the communication standards considered.
• Figure 3A shows the current distribution on the elliptical surface of the radiating element 2 for the first resonance mode
• Figure 3B shows the current distribution for the fourth resonance mode
• Figure 3C for the ninth mode of resonance. resonance.
• Each location of the radiating element 2 to which a communication port 3 to 5 is connected corresponds to a location 60 where the radiation is maximum for a resonance mode distinct from the other resonance modes for which a communication port is connected. They are thus isolated from each other, no interference disturbing their transmission or reception of signals over their frequency range.
• the antenna 1 further comprises ground tracks 11, 12, 13, 14 and 15 arranged on the substrate 10 and electrically isolated from the radiating element 2.
• the ground tracks 11 to 15 each have an impedance matched to one of the frequency ranges used for a communication standard. In the embodiment illustrated in FIG. 2, each of the five ground tracks 11 to 15 can thus be adapted to a different communication standard.
• the invention thus provides an antenna provided with a single radiating element configured to simultaneously receive and process signals from different communication technologies using different communication standards, without any configuration or adaptation network.

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• Variable-Direction Aerials And Aerial Arrays (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=72709500

Family Applications (1)

Country Status (3)

Family Cites Families (5)

• 2020
  • 2020-06-11 FR FR2006115A patent/FR3111480A1/fr active Pending
• 2021
  • 2021-06-06 EP EP21737709.2A patent/EP4165727A1/de active Pending
  • 2021-06-06 WO PCT/FR2021/051014 patent/WO2021250342A1/fr unknown

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