Foldable antenna system and wireless communication device comprising same

Abstract

The invention relates to a foldable antenna system (100) and to a wireless communication device (300) that comprises the foldable antenna system (100). One of the objectives of this invention is to provide a simple and quick mechanism for folding / unfolding a foldable Yagi-Uda antenna (120). To this end, the inventor proposes an ergonomic system that allows the antenna elements of the Yagi-Uda antenna (120) to be held in place and released, by virtue of use of magnetic arrangements (e.g. magnets) that are cleverly positioned on the system. In particular, the system makes it possible to trigger unfolding of the Yagi-Uda antenna (120) by permitting dynamic positioning of a single magnetic arrangement.

Description

FOLDABLE ANTENNA SYSTEM AND WIRELESS COMMUNICATION DEVICE COMPRISING SAME

[0001] The invention relates to the field of foldable or extendable antennas. In particular, it relates to a foldable antenna system and a wireless communication device that comprises the foldable antenna system.

[0002] Similar systems and devices are known from documents US2022294117A1, DE202009017949,U1 CN216529370U, US3581104A and CN110165357B.

[0003] A collapsible antenna is usually made up of several sections of metal rods that fold together for easy transport and storage. Each of these sections is connected to the next by a joint that allows it to bend in a specific direction.

[0004] Typically, such a joint consists of two main parts, a pin and a bushing, which work together to hold the sections in place.

[0005] In particular, the axle is a metal rod that fits into both sections of the antenna and allows the joint to pivot.

[0006] Furthermore, the ring is a small metal piece that fits around the axle and can be turned to tighten or loosen the joint.

[0007] So when the ring is tightened it holds the antenna sections in place, while when it is loosened the sections can rotate around the axis.

[0008] In practice, the tension needed to hold the antenna sections in place is provided by a frictional force between the shaft and the ring, as well as the stiffness of the antenna sections themselves.

[0009] So when the ring is tightened, it puts pressure on the axle and creates enough friction to hold the sections in place.

[0010] However, this prior art mechanism takes a long time to set up and unset, which can be detrimental in situations that require rapid action.

[0011] Furthermore, such a system appears very complex to implement for Yagi-Uda antennas which nevertheless have a very simple structure.

[0012] Thus, there is a need for a solution that can avoid the situation described above.

[0013] The invention aims to solve, at least partially, this need.

[0014] The invention particularly relates to a foldable antenna system and a wireless communication device using this system, as described in the appended claims.

[0015] The foldable antenna system includes, among other things, a support frame, a Yagi-Uda antenna with hinged antenna elements, and a magnetic trigger block. The invention uses magnetic arrangements to hold the antenna in the folded position and deploy it in a controlled manner.

[0016] The dependent claims describe specific embodiments of the invention, including different configurations of the magnetic arrangements, additional structural features of the support frame, and integration of the foldable antenna system into a wireless communication device.

[0017] These and other aspects of the present invention will be apparent and elucidated from the embodiments described hereinafter.

[0018] Other characteristics and advantages of the invention will be better understood upon reading the description which follows and with reference to the appended drawings, given for illustrative purposes and in no way limiting.

[0019] The figure represents a first side perspective view of the foldable antenna system according to the invention.

[0020] The figure represents a second side perspective view of the foldable antenna system according to the invention.

[0021] The figure represents a third side perspective view of the foldable antenna system according to the invention.

[0022] It represents a first zoomed view of a part of the.

[0023] It represents a second zoomed view of part of the.

[0024] It represents a variant of the one without magnetic arrangement.

[0025] It represents a zoomed view of part of the.

[0026] The figure represents a fourth side perspective view of the foldable antenna system according to the invention.

[0027] It represents a variant of the.

[0028] The figure represents a first side perspective view of the wireless communication device according to the invention.

[0029] The figure represents a second side perspective view of the wireless communication device according to the invention.

[0030] Lrepresents a third side perspective view of the wireless communication device according to the invention.

[0031] Figures are not necessarily to scale for illustrative purposes.

[0032] Additionally, some drawings are presented in color and / or transparency, as their representation in black and white is impossible. In particular, colors are necessary in these drawings to discern details that would be lost if they were presented in black and white.

[0033] Preliminary remarks

[0034] In order not to obscure the description and distract the reader from understanding the teachings of the invention, our explanations will not go beyond what is considered necessary for understanding and appreciating the underlying concepts of the invention. Indeed, the embodiments illustrated in the description are, for the most part, composed of elements known to those skilled in the art.

[0035] In particular, in the description, the structure and operating principle of a Yagi-Uda antenna will be considered as known, as described, for example, in chapter 8.5 of the work "Antennas - Theory, design and applications" by PICON Odile, CIRIO Laurent, RIPOLL Christian, BAUDOIN Geneviève, BERCHER Jean-François and VILLEGAS Martine; Dunod; 3009.

[0036] Objective of the invention

[0037] One of the objectives of this invention is to provide a simple and quick mechanism for folding / unfolding a foldable Yagi-Uda antenna.

[0038] To this end, the inventor proposes an ergonomic system that allows the antenna elements of the Yagi-Uda antenna to be held in place and released, thanks to the use of magnetic arrangements that are cleverly positioned within the system.

[0039] In particular, the system allows triggering the unfolding of the Yagi-Uda antenna by allowing the dynamic positioning of a single magnetic arrangement.

[0040] General structure of the invention

[0041] As illustrated in the, the, the, the, the, the, the, the and the, a foldable antenna system 100 is provided that includes at least one support frame 110, at least one Yagi-Uda antenna 120, and at least one magnetic trigger block 130.

[0042] Thus, the foldable antenna system 100 may include two or more support frames 110, two or more Yagi-Uda antennas 120, and two or more magnetic trigger blocks 130.

[0043] A "system" is a set of elements that are interconnected and influence each other.

[0044] The support frame

[0045] In the example of the, the, the, the, the, the, the, the and the, the support frame 110 extends from upstream to downstream in the direction of the arrow F, along a central longitudinal axis.

[0046] In the invention, as illustrated in the, the, the, the, the, the, the, the, the and the, the support frame 110 is adapted to support the antenna elements 121, 122, 123 of the Yagi-Uda antenna 120.

[0047] As is known, the antenna elements 121, 122, 123 of the Yagi-Uda antenna 120 are conductive elements which are generally made of a metallic conductive wire. Conventionally, a strand can have different lengths and shapes depending on its role in the Yagi-Uda antenna 120.

[0048] In practice, the support frame 110 may have a shape suitable for the desired application.

[0049] For example, the support frame 110 may generally be elongated and in the shape of a parallelepiped or in the shape of a plate.

[0050] However, depending on the needs and available resources, other forms of the support frame 110 may be considered, without requiring substantial modifications of the invention.

[0051] The telescopic part of the support frame

[0052] In one implementation of the support frame 110, as illustrated in 1a, 1a, 1a and 1a, it further comprises at least one interior cavity 111 and at least one telescopic end portion 112.

[0053] Thus, the support frame 110 may comprise two or more interior cavities 111 and two or more telescopic end portions 112.

[0054] In a first example of the interior cavity 111, as illustrated in the, it has a rectangular or square section and extends longitudinally.

[0055] In a second example of the interior cavity 111, it has a circular section and extends longitudinally.

[0056] In a third example of the interior cavity 111, it has a polygonal section and extends longitudinally.

[0057] However, depending on the needs and available resources, other shapes of the interior cavity 111 may be considered, without requiring substantial modifications to the invention.

[0058] In practice, the telescopic end portion 112 is designed to support at least one antenna element 121, 122, 123 of the Yagi-Uda antenna 120.

[0059] Thus, the telescopic end portion 112 can support two or more antenna elements 121, 122, 123 of the Yagi-Uda antenna 120.

[0060] In the example of 1a, 1a, 1a, and 1a, the telescopic end portion 112 supports a single antenna element 122.

[0061] In the implementation of the support frame 110, the telescopic end portion 112 is also adapted to move between a retracted telescopic position and an extended telescopic position.

[0062] In a first example of the telescopic end portion 112, it moves between the retracted telescopic position and the extended telescopic position by translation.

[0063] In a second example of the telescopic end portion 112, it moves between the retracted telescopic position and the extended telescopic position by rotation.

[0064] However, depending on the needs and available resources, other means may be considered for moving the telescopic end portion 112 between the retracted telescopic position and the extended telescopic position, without requiring substantial modifications to the invention.

[0065] La, la, laet ...

[0066] In practice, in the retracted telescopic position, the telescopic end portion 112 is disposed mostly within the interior cavity 111.

[0067] Furthermore, in the extended telescopic position, the telescopic end portion 112 is disposed mostly outside the interior cavity 111.

[0068] Folding / unfolding the antenna elements

[0069] Still in the invention, the antenna elements 121, 122, 123 of the Yagi-Uda antenna 120 are designed to be moved, between a folded position and a deployed position, without being completely detached from the support frame 110.

[0070] In a first particular implementation of the antenna elements 121, 122, 123, these deploy in the direction of the arrow F and fold in the direction opposite to the arrow F.

[0071] In a second particular implementation of the antenna elements 121, 122, 123, these deploy in the direction opposite to the arrow F and fold in the direction of the arrow F.

[0072] La, la, la, laet laet illustrate the folded position while la, la, la, laet laet laet illustrate the deployed position.

[0073] In a first implementation of the stowed position, as illustrated in 1, 1, 1, 1 and 1, the antenna elements 121, 122, 123 are arranged to follow a general alignment with the support frame 110.

[0074] In other words, in the first implementation of the folded position, when all or part of the support frame 110 is substantially rectilinear, then the antenna elements 121, 122, 123 are arranged so as to follow a straight or almost straight path.

[0075] In a second implementation of the folded position, the antenna elements 121, 122, 123 are arranged to follow a general curvature with the support frame 110.

[0076] In other words, in the second implementation of the folded position, when all or part of the support frame 110 is substantially curved, then the antenna elements 121, 122, 123 are arranged so as to follow a curved or quasi-curved path.

[0077] Furthermore, in the deployed position, as illustrated in 1, 1, 1, 1 and 1, the antenna elements 121, 122, 123 are arranged transversely relative to the support frame 110.

[0078] In other words, in the deployed position, the antenna elements 121, 122, 123 are arranged so as to cross the support frame 110 perpendicularly or almost perpendicularly.

[0079] The articulation of the antenna elements

[0080] In the invention, the antenna elements 121, 122, 123 of the Yagi-Uda antenna 120 are hingedly coupled to the support frame 110.

[0081] Alternatively, the antenna elements 121, 122, 123 of the Yagi-Uda antenna 120 are hingedly coupled to at least one portion which is integral with the support frame 110.

[0082] The term "articulation" means a mechanism that allows the antenna elements 121, 122, 123 of the Yagi-Uda antenna 120 to move relative to the support frame 110, between the folded position and the deployed position, while maintaining their connection with the support frame 110.

[0083] In a particular implementation of an articulation according to the invention, as illustrated in the, the, the, the, the, the, the, the and the, at least one antenna element 121, 122, 123 of the Yagi-Uda antenna 120 is formed from a pair of strands, each strand of a pair being provided with a proximal end and an opposite distal end.

[0084] In practice, in this particular implementation, the proximal end of each strand of a pair is coupled by at least one hinge to the support frame 110.

[0085] Thus, the proximal end of each strand may be coupled by two or more joints to the support frame 110.

[0086] In a variant of the particular implementation of an articulation, when several antenna elements 121,122,123 of the Yagi-Uda antenna 120 are formed of a pair of strands, then the pair of articulations associated with each antenna element 121,122,123 is distinct from the pair of articulations of the others.

[0087] In other words, in the variant of the particular implementation of a joint, no pair of strands has joints in common.

[0088] Furthermore, in the variant of the particular implementation of an articulation, the articulation of at least one antenna element 121, 122, 123 is movable (e.g. by translation or rotation)

[0089] An example of articulation of antenna elements

[0090] In one example of a joint, as illustrated in 1, 1, 1, 1, 1 and 1, it comprises at least one return element 143 which is placed between the support frame 110 and each antenna element 121, 122, 123.

[0091] Thus, when the antenna elements 121,122,123 are in the stowed position, the biasing element 143 is compressed and stores potential energy. Then, when the antenna elements 121,122,123 are deployed, the biasing element 143 relaxes and provides a biasing force that helps move the element to its deployed position and hold it there.

[0092] Finally, to fold the antenna elements 121, 122, 123, sufficient force must be applied to compress the return element 143 and return the antenna elements 121, 122, 123 to the folded position.

[0093] A "resilient element" is a device or material that is capable of undergoing temporary deformations under the effect of an external force and of returning to its original shape when this force is removed. Of course, the "deformation" undergone is not necessarily a mechanical deformation of the device or material. Indeed, the term "resilient" in the expression "resilient element" describes the ability of the element to return to its initial position after being moved away from it by an external force which may be a mechanical force, a magnetic force or an electrical force. Thus, the element may undergo a change from a mechanical force, a magnetic force or an electrical force acting on it.

[0094] For example, the return element 143 is an elastic return element such as a mechanical spring or an elastomeric return element.

[0095] However, depending on the needs and available resources, it may be possible to consider using other return elements (e.g. a magnetic force return element such as a magnetic spring, or an electrical force return element such as an electric spring or electromagnet), without requiring substantial modifications to the invention.

[0096] Minimal structure of a Yagi-Uda antenna

[0097] In the invention, the Yagi-Uda antenna 120 comprises a single powered antenna element, called the radiator element 121 (also called the “radiating element”) and at least one first unpowered antenna element, called the first parasitic element 122.

[0098] Thus, the Yagi-Uda antenna 120 comprises a single radiator element 121 and may comprise two or more first parasitic elements 122.

[0099] In a particular implementation, the radiator element 121 is designed as a dipole, acting as both a transmitter and receiver of a radiated electromagnetic field.

[0100] In a first embodiment, the radiator element 121 is designed to receive at least one electromagnetic field radiated by a source of electromagnetic waves.

[0101] In a second embodiment, the radiator element 121 is configured to be powered by a power source (e.g., a current power source or a voltage power source) to produce at least one radiated electromagnetic field.

[0102] In an example of the second embodiment, as illustrated in ,the, the, theand the, the radiator element 121 is connected to the power source via a power cable 200 (e.g., a coaxial feed line) so as to supply a current or voltage to the radiator element 121 to produce the radiated electromagnetic field.

[0103] In general, to provide power to the radiator element 121, the power cable 200 is connected to the radiator element 121 at a specific point, in its middle (called the power point).

[0104] The radiator element includes a magnetic arrangement

[0105] In the invention, the radiator element 121 is further configured to support a first magnetic arrangement 1210, as illustrated in 1 , 1 , 1 , 1 and 1 .

[0106] "Magnetic arrangement" means the configuration or arrangement of multiple magnetic sources of desired magnetic polarities (e.g., magnets, electromagnets, layers of magnetically attractive / repulsive material) such that the magnetic sources interact with each other to create at least one magnetic field in at least one desired direction.

[0107] In the example of the, the first magnetic arrangement 1210 comprises two rows of magnetic sources of alternating polarities. In particular, the first magnetic arrangement 1210 is arranged such that the polarities 1210a, 1210b of adjacent magnetic sources are opposite.

[0108] First variant of a magnetic arrangement

[0109] In a first implementation of the first magnetic arrangement 1210, it comprises a plurality of north pole and south pole permanent magnets, which is arranged to impart desired magnetic polarities in at least one desired direction.

[0110] Second variant of a magnetic arrangement

[0111] In a second implementation of the first magnetic arrangement 1210, it comprises a plurality of electromagnets.

[0112] Further, in the second implementation of the first magnetic arrangement 1210, the foldable antenna system 100 further comprises at least one first excitation switching means which is configured to magnetize the plurality of electromagnets so as to impart desired magnetic polarities in at least one desired direction.

[0113] In a first example, the first excitation switching means is a relay.

[0114] In a second example, the first excitation switching means is a transistor.

[0115] In a third example, the first excitation switching means is a contactor.

[0116] However, depending on the needs and available resources, other excitation switching means (e.g. thyristor, triac, magnetically controlled switch, mercury switch or optocoupler) may be considered, without requiring substantial modifications of the invention.

[0117] In the invention, the first magnetic arrangement 1210 is coupled to the body of the radiator element 121.

[0118] In a first example, the body of the radiator element 121 comprises at least one through hole which is adapted to accommodate the first magnetic arrangement 1210.

[0119] In the example of the, two through holes 1211 are formed in the body of the radiator element 121, and are adapted to accommodate the first magnetic arrangement 1210.

[0120] In a second example, the first magnetic arrangement 1210 is coupled to the body of the radiator element 121 by gluing.

[0121] In a third example, the first magnetic arrangement 1210 is coupled to the body of the radiator element 121 by welding.

[0122] In a fourth example, the first magnetic arrangement 1210 is coupled to the body of the radiator element 121 by means of a clip.

[0123] However, depending on the needs and available resources, other means may be considered for coupling the first magnetic arrangement 1210 to the body of the radiator element 121 (e.g., double-sided adhesive tape, wire, cable tie), without requiring substantial modifications of the invention.

[0124] How the magnetic arrangement works

[0125] In the invention, the first parasitic element 122 is arranged so as to produce a first induced current within the electromagnetic field radiated by the radiator element 121.

[0126] In practice, the first parasitic element 122 is designed not to be powered by a power source.

[0127] In a first implementation of the first parasitic element 122, as illustrated in 1, 1, 1 and 1, it is a director element.

[0128] As is known, the director element is located in front of the radiator element 121. The director element is designed to reduce the electromagnetic waves produced in the lateral directions of the Yagi-Uda antenna 120, while increasing the power in the desired direction. Thus, when an electromagnetic wave arrives at the director element, it is absorbed and the power is converted into heat. This reduces the power radiated in the direction of the director element and strengthens the directivity of the antenna towards the front.

[0129] In a second implementation of the first parasitic element 122, it is a reflective element.

[0130] As is known, the reflector element is located at the rear of the radiator element 121. The reflector element is designed to reflect electromagnetic waves towards the radiator element 121. Thus, when an electromagnetic wave arrives at the reflector element, it is reflected and combines with the electromagnetic wave produced by the radiator element 121. This strengthens the electromagnetic field in the desired direction and creates a forward directivity of the Yagi-Uda antenna 120.

[0131] The first parasitic element comprises a magnetic arrangement

[0132] Furthermore, as illustrated in 1a, 1a and 1a, the first parasitic element 122 is adapted to support a second magnetic arrangement 1220, of the same type or similar to the first magnetic arrangement 1210 described above.

[0133] In a first implementation of the second magnetic arrangement 1220, it comprises a plurality of north pole and south pole permanent magnets, which is arranged to impart desired magnetic polarities in at least one desired direction.

[0134] In a second implementation of the second magnetic arrangement 1220, it comprises a plurality of electromagnets.

[0135] Further, in the second implementation of the second magnetic arrangement 1220, the foldable antenna system 100 further comprises at least one second excitation switching means that is configured to magnetize the plurality of electromagnets so as to impart desired magnetic polarities in at least one desired direction.

[0136] In the invention, to couple the second magnetic arrangement 1220 to the body of the first parasitic element 122, known coupling means may be used such as the coupling means described above to couple the first magnetic arrangement 1210 to the body of the radiator element 121.

[0137] The magnetic trigger block

[0138] Still in the invention, the magnetic trigger block 130 is coupled to the support frame 110.

[0139] In the expression "trigger block", we mean by "block" a group of elements brought together which contribute to the execution of a task, namely, here, a trigger.

[0140] In the example illustrated in the, the, the, the, the, the, the and the, the magnetic trigger block 130 is located upstream of the support frame 110, at one of its ends.

[0141] Of course, depending on the needs and available resources, it will be possible to consider positioning the magnetic trigger block 130 elsewhere relative to the support frame 110, without requiring substantial modifications to the invention.

[0142] The magnetic trigger block includes a magnetic arrangement

[0143] In the invention, as illustrated in 1a, 1a and 1a, the magnetic trigger block 130 comprises a third magnetic arrangement 1300, of the same type or similar to the first magnetic arrangement 1210 described above.

[0144] In a first implementation of the third magnetic arrangement 1300, it comprises a plurality of north pole and south pole permanent magnets, which is arranged to impart desired magnetic polarities in at least one desired direction.

[0145] In a second implementation of the third magnetic arrangement 1300, it comprises a plurality of electromagnets.

[0146] Further, in the second implementation of the third magnetic arrangement 1300, the foldable antenna system 100 further comprises at least one third excitation switching means that is configured to magnetize the plurality of electromagnets so as to impart desired magnetic polarities in at least one desired direction.

[0147] In the invention, to couple the third magnetic arrangement 1300 to the body of the magnetic trigger block 130, known coupling means may be used such as the coupling means described above to couple the first magnetic arrangement 1210 to the body of the radiator element 121.

[0148] How the magnetic arrangement works

[0149] Furthermore, in the invention, the magnetic trigger block 130 is adapted to be moved from a holding position to a releasing position.

[0150] In the holding position, the first magnetic arrangement 1210, the second magnetic arrangement 1220 and the third magnetic arrangement 1300 are oriented so as to produce a first magnetic attraction force and a second magnetic attraction force which hold the radiator element 121 and the first parasitic element 122 in the folded position.

[0151] In particular, the first magnetic force of attraction is exerted between the first magnetic arrangement 1210 and the second magnetic arrangement 1220 while the second magnetic force of attraction is exerted between the first magnetic arrangement 1210 and the third magnetic arrangement 1300.

[0152] In the release position, in response to an actuation of the magnetic trigger block 130, the third magnetic arrangement 1300 is oriented so as to produce a first repulsive magnetic force which moves the radiator element 121 and the first parasitic element 122 from the stowed position to the deployed position.

[0153] In particular, the first magnetic repulsion force is exerted between the first magnetic arrangement 1210 and the third magnetic arrangement 1300.

[0154] In a particular implementation of the magnetic trigger block 130, as illustrated in 1, 1, 1, 1 and 1, it further comprises an actuator 131.

[0155] In practice, the actuator 131 is designed to cooperate with the third magnetic arrangement 1300.

[0156] Conventionally, "cooperate" means that, in operation, the actuator 131 and the third magnetic arrangement 1300 act in concert.

[0157] The magnetic trigger block includes an actuator

[0158] In a particular implementation of the actuator 131, as illustrated in 1a and 1a, the third magnetic arrangement 1300 is disposed at least partially within the actuator 131.

[0159] Further, in the particular implementation of the magnetic trigger block 130, in response to an actuation of the actuator 131, the third magnetic arrangement 1300 is configured to be driven in a predetermined direction.

[0160] In a first implementation of the actuator 131, it is a push button which drives the third magnetic arrangement 1300 in translation.

[0161] In the example of laet de la, the actuator 131 is driven in translation in the direction of the arrow T to move the magnetic trigger block 130 from the holding position to the release position.

[0162] In a second implementation of the actuator 131, it is a rotary knob (not shown) which rotates the third magnetic arrangement 1300 about an axis.

[0163] The Yagi-Uda antenna includes a second parasitic element

[0164] In a first embodiment of the invention, as illustrated in the, the, the, the, the, the, the, the and the, the Yagi-Uda antenna 120 further comprises at least one second unpowered antenna element, called second parasitic element 123.

[0165] Thus, in the first embodiment of the invention, the Yagi-Uda antenna 120 comprises a single radiator element 121 and may comprise two or more first parasitic elements 122 and two or more second parasitic elements 123.

[0166] In the first embodiment of the invention, the second parasitic element 123 is arranged so as to produce a second induced current within the electromagnetic field radiated by the radiator element 121.

[0167] In practice, the second parasitic element 123 is designed not to be powered by a power source.

[0168] In a first implementation of the second parasitic element 123, as illustrated in 1, 1, 1 and 1, it is a reflective element.

[0169] In a variant of the first implementation of the second parasitic element 123, the joint to which the second parasitic element 123 is coupled to the support frame 110 is movable (e.g., in translation or rotation).

[0170] In the example of laet la, this joint is mobile in translation in the direction of arrow S, in the upstream direction.

[0171] In a second implementation of the second parasitic element 123, it is a director element.

[0172] The second parasitic element comprises a magnetic arrangement

[0173] Furthermore, in the first embodiment of the invention, as illustrated in the, the second parasitic element 123 is adapted to support a fourth magnetic arrangement 1230, of the same type or similar to the first magnetic arrangement 1210 described above.

[0174] In a first implementation of the fourth magnetic arrangement 1230, it comprises a plurality of north pole and south pole permanent magnets, which is arranged to impart desired magnetic polarities in at least one desired direction.

[0175] In a second implementation of the fourth magnetic arrangement 1230, it comprises a plurality of electromagnets.

[0176] Further, in the second implementation of the fourth magnetic arrangement 1230, the foldable antenna system 100 further comprises at least one fourth excitation switching means which is configured to magnetize the plurality of electromagnets so as to impart desired magnetic polarities in at least one desired direction.

[0177] In the invention, to couple the fourth magnetic arrangement 1230 to the body of the second parasitic element 123, known coupling means may be used such as the coupling means described above to couple the first magnetic arrangement 1210 to the body of the radiator element 121.

[0178] How the magnetic arrangement works

[0179] Furthermore, in the first embodiment of the invention, when the magnetic trigger block 130 is in the holding position, the first magnetic arrangement 1210, the second magnetic arrangement 1220, the third magnetic arrangement 1300 and the fourth magnetic arrangement 1230 are oriented so as to produce a first magnetic attraction force, a third magnetic attraction force and a fourth magnetic attraction force which hold the radiator element 121, the first parasitic element 122 and the second parasitic element 123 in the folded position.

[0180] In particular, the first magnetic force of attraction is exerted between the first magnetic arrangement 1210 and the second magnetic arrangement 1220, the third magnetic force of attraction is exerted between the first magnetic arrangement 1210 and the fourth magnetic arrangement 1230 while the fourth magnetic force of attraction is exerted between the third magnetic arrangement 1300 and the fourth magnetic arrangement 1230.

[0181] Then, in the first embodiment of the invention, when the magnetic trigger block 130 is in the release position, in response to an actuation of the magnetic trigger block 130, the third magnetic arrangement 1300 is oriented so as to produce a second repulsive magnetic force which moves the radiator element 121, the first parasitic element 122 and the second parasitic element 123 from the stowed position to the deployed position.

[0182] In particular, the second magnetic repulsion force is exerted between the third magnetic arrangement 1300 and the fourth magnetic arrangement 1230.

[0183] The wireless communication device

[0184] As illustrated in 1 and 1a, the invention also relates to a wireless communication device 300.

[0185] In practice, the wireless communication device 300 comprises a housing 310, at least one handle 320, at least one foldable antenna system 100 as described above, at least one first cavity-protrusion coupling portion (not shown) and at least one second cavity-protrusion coupling portion (not shown).

[0186] Thus, the wireless communication device 300 includes a housing 310 and may include two or more handles 320, two or more first cavity-protrusion coupling portions, and two or more second cavity-protrusion coupling portions.

[0187] In practice, the 310 case may have a shape suitable for the desired application.

[0188] In the example of laet de la, the housing 310 has a generally elongated and substantially truncated shape.

[0189] However, depending on the needs and available resources, other shapes of the housing 310 may be considered (e.g. a generally elongated or parallelepiped or spherical shape), without requiring substantial modifications to the invention.

[0190] In the invention, the handle 320 protrudes from the housing 310.

[0191] In practice, the handle 320 is designed to be grasped by at least one hand of a user.

[0192] In the example of laet de la, the handle 320 protrudes from below the housing 310 towards the ground, when grasped by a user's hand.

[0193] However, depending on the needs and available resources, other positions of the handle 320 may be envisaged (e.g. projecting from the top of the housing 310 towards the sky or projecting from at least one lateral side of the housing 310 in a lateral direction), without requiring substantial modifications to the invention.

[0194] In the invention, the first cavity-protrusion coupling portion is disposed at the support frame 110 of the foldable antenna system 100 while the second cavity-protrusion coupling portion is disposed at the housing 310.

[0195] A "cavity-protrusion coupling" means a mechanical fastening device used to connect two parts together in a strong and stable manner. In practice, in a cavity-protrusion coupling, one of the parts has a cavity or notch, while the other part has a projection that is designed to fit into the cavity.

[0196] Of course, if one wishes to provide an even stronger and more stable fixing, one could consider combining the "cavity-protrusion coupling" method with other fixing methods (e.g. screws, rivets or welds).

[0197] In one example, the first cavity-protrusion coupling portion is disposed on a lower surface of the support frame 110 while the second cavity-protrusion coupling portion is disposed on an upper surface of the housing 310.

[0198] In the invention, the second cavity-protrusion coupling portion is adapted to be removably coupled, by cavity-protrusion coupling, to the first cavity-protrusion coupling portion.

[0199] In one embodiment of the wireless communication device 300, it further comprises a radio unit (not shown).

[0200] In the invention, the radio block is an electronic device that is used to process the radiated electromagnetic field that is received or produced by the radiator element 121.

[0201] In reception, the radio unit is notably designed to convert the radiated electromagnetic field received by the radiator element 121 into audio signals or data signals which can be used by a user.

[0202] In transmission, the radio unit is notably designed to convert audio signals or data signals into a radiated electromagnetic field which can be transmitted by the radiator element 121.

[0203] The radio block can be used to process a variety of signals, such as AM / FM radio broadcast signals, VHF signals, mobile radio communication signals, satellite navigation signals, or digital broadcast signals.

[0204] In the expression "radio block", we mean by "block" a group of electronic elements brought together which contribute to the execution of a task, namely, here, the processing of radio signals, in reception and / or in transmission.

[0205] Furthermore, in the embodiment of the wireless communication device 300, the housing 310 further comprises an open internal cavity 311.

[0206] In practice, the open internal cavity 311 is designed to receive the radio unit.

[0207] In the example of laet de la, the open internal cavity 311 is arranged upstream of the housing 310.

[0208] However, depending on the needs and available resources, other positions of the open internal cavity 311 (e.g. at a lateral side of the housing 310) may be considered, without requiring substantial modifications of the invention.

[0209] Further, in the embodiment of the wireless communication device 300, a third cavity-protrusion coupling portion is disposed at the open internal cavity 311, while a fourth cavity-protrusion coupling portion is disposed at the radio block.

[0210] In one example, the third cavity-protrusion coupling portion is disposed on an interior surface of the open internal cavity 311 while the fourth cavity-protrusion coupling portion is disposed on an exterior surface of the radio block.

[0211] We have described and illustrated the invention. However, the invention is not limited to the embodiments that we have presented. Indeed, numerous combinations of variants, alternatives, embodiments and implementations can be envisaged without requiring substantial modifications of the invention. Thus, an expert in the field can deduce other variants, alternatives, embodiments and implementations, upon reading the description and the appended figures and depending on the economic, ergonomic and dimensional constraints to be respected.

[0212] In particular, when an item is "designed" to perform a particular function, it means that this item is created specifically for the purpose of performing that particular function.

[0213] However, depending on the needs and available resources, it may be possible to consider using an existing element, which will be modified or adapted to fulfill this particular function, without requiring substantial modifications to the invention.

[0214] The invention may be the subject of numerous variations and applications other than those described above. In particular, unless otherwise indicated, the different structural and functional features of each particular implementation described above should not be considered as combined and / or closely and / or inextricably linked to each other, but, on the contrary, as mere juxtapositions. Furthermore, the structural and / or functional features of the different embodiments described above may be the subject in whole or in part of any different juxtaposition or any different combination.

[0215] In a first variant of the invention, the third magnetic arrangement 1300 comprises at least one permanent magnet.

[0216] Thus, in the first variant of the invention, the third magnetic arrangement 1300 may comprise two or more permanent magnets.

[0217] Further, each of the first magnetic arrangement 1210, the second magnetic arrangement 1220, and the fourth magnetic arrangement 1230 includes a plurality of layers of magnetically attractive material and magnetically repulsive material, which are arranged to impart desired magnetic polarities in at least one desired direction.

[0218] In a second variant of the invention, the third magnetic arrangement 1300 comprises at least one electromagnet.

[0219] Thus, in the second variant of the invention, the third magnetic arrangement 1300 may comprise two or more electromagnets.

[0220] Further, each of the first magnetic arrangement 1210, the second magnetic arrangement 1220, and the fourth magnetic arrangement 1230 includes a plurality of layers of magnetically attractive material and magnetically repulsive material, which are arranged to impart desired magnetic polarities in at least one desired direction.

[0221] Finally, in the second variant the invention further comprises at least one fifth excitation switching means which is designed to magnetize the electromagnet so as to impart at least one desired magnetic polarity.

[0222] Thus, the second variant of the invention may comprise two or more fifth excitation switching means which are adapted to magnetize the electromagnet so as to impart two or more desired magnetic polarities in at least one desired direction.

[0223] In a third variant of the invention, the antenna elements 121, 122, 123 of the Yagi-Uda antenna 120 are designed to be moved, synchronously (i.e. substantially at the same time), between a folded position and a deployed position, without being completely detached from the support frame 110.

[0224] In a fourth variant of the invention, the antenna elements 121, 122, 123 of the Yagi-Uda antenna 120 are designed to be moved, substantially asynchronously, between a folded position and a deployed position, without being completely detached from the support frame 110.

Claims

Foldable antenna system (100) comprising,- at least one support frame (110),- at least one Yagi-Uda antenna (120), the antenna elements (121,122,123) of which are articulatedly coupled to the support frame (110) or to a part integral with the support frame (110), and which are designed to be moved between a folded position and a deployed position, the Yagi-Uda antenna (120) comprising,- a single antenna element (121,122,123), called a radiator element (121), which supports a first magnetic arrangement (1210) and which is designed to produce or receive at least one radiated electromagnetic field,- at least one first unpowered antenna element (121,122,123), called a first parasitic element (122), which supports a second magnetic arrangement (1220) and which is arranged to produce a first current induced inside the radiated electromagnetic field,- at least one magnetic trigger block (130) which is coupled to the support frame (110) and which comprises a third magnetic arrangement (1300), the magnetic trigger block (130) being adapted to be moved from a holding position to a release position,- in the holding position, the first magnetic arrangement (1210), the second magnetic arrangement (1220) and the third magnetic arrangement (1300) are oriented so as to produce a first magnetic attraction force and a second magnetic attraction force which hold the radiator element (121) and the first parasitic element (122) in the folded position, the first magnetic attraction force being exerted between the first magnetic arrangement (1210) and the second magnetic arrangement (1220), and the second magnetic attraction force being exerted between the first magnetic arrangement (1210) and the third magnetic arrangement (1300), and,- in the release position, in response to an actuation of the magnetic trigger block (130), the third magnetic arrangement (1300) is oriented so as to produce a first magnetic repulsion force which moves the radiator element (121) and the first parasitic element (122) from the folded position to the deployed position, the first magnetic repulsion force being exerted between the first magnetic arrangement (1210) and the third magnetic arrangement (1300)., Foldable antenna system (100) comprising,- at least one support frame (110),- at least one Yagi-Uda antenna (120), the antenna elements (121,122,123) of which are articulatedly coupled to the support frame (110) or to a part integral with the support frame (110), and which are designed to be moved between a folded position and a deployed position, the Yagi-Uda antenna (120) comprising,- a single antenna element (121,122,123), called a radiator element (121), which supports a first magnetic arrangement (1210) and which is designed to produce or receive at least one radiated electromagnetic field,- at least one first unpowered antenna element (121,122,123), called a first parasitic element (122), which supports a second magnetic arrangement (1220) and which is arranged to produce a first current induced inside the radiated electromagnetic field,- at least one second unpowered antenna element (121,122,123),said second parasitic element (123) which is arranged to produce a second induced current within the radiated electromagnetic field, the second parasitic element (123) being adapted to support a fourth magnetic arrangement (1230),- at least one magnetic trigger block (130) which is coupled to the support frame (110) and which comprises a third magnetic arrangement (1300), the magnetic trigger block (130) being adapted to be moved from a holding position to a release position,- in the holding position, the first magnetic arrangement (1210), the second magnetic arrangement (1220), the third magnetic arrangement (1300) and the fourth magnetic arrangement (1230) are oriented so as to produce a first magnetic attraction force, a third magnetic attraction force and a fourth magnetic attraction force which hold the radiator element (121),the first parasitic element (122) and the second parasitic element (123) in the folded position, the first magnetic force of attraction being exerted between the first magnetic arrangement (1210) and the second magnetic arrangement (1220), the third magnetic force of attraction being exerted between the first magnetic arrangement (1210) and the fourth magnetic arrangement (1230), and the fourth magnetic force of attraction being exerted between the third magnetic arrangement (1300) and the fourth magnetic arrangement (1230), and- in the release position, in response to an actuation of the magnetic trigger block (130), the third magnetic arrangement (1300) is oriented so as to produce a second magnetic force of repulsion which moves the radiator element (121), the first parasitic element (122) and the second parasitic element (123) from the folded position to the deployed position,the second magnetic repulsion force acting between the third magnetic arrangement (1300) and the fourth magnetic arrangement (1230)., A foldable antenna system (100) according to any one of claims 1 to 2, wherein,- the magnetic trigger block (130) further comprises an actuator (131) which is adapted to cooperate with the third magnetic arrangement (1300), and- in response to an actuation of the actuator (131), the third magnetic arrangement (1300) is adapted to be driven in a predetermined direction. A foldable antenna system (100) according to any one of claims 1 to 3, wherein the support frame (110) further comprises at least one interior cavity (111) and at least one telescopic end portion (112), the telescopic end portion (112) being adapted to move between a retracted telescopic position and an extended telescopic position,- in the retracted position, the telescopic end portion (112) is disposed substantially within the interior cavity (111), and- in the extended telescopic position, the telescopic end portion (112) is disposed substantially outside the interior cavity (111). The foldable antenna system (100) of claim 2 in combination with any one of claims 3 to 4, wherein each of the first magnetic arrangement (1210), the second magnetic arrangement (1220), the third magnetic arrangement (1300) and the fourth magnetic arrangement (1230), comprises a plurality of North pole and South pole permanent magnets, which is arranged to impart desired magnetic polarities in at least one desired direction. The foldable antenna system (100) of claim 2 in combination with any one of claims 3 to 4, wherein each of the first magnetic arrangement (1210), the second magnetic arrangement (1220), the third magnetic arrangement (1300) and the fourth magnetic arrangement (1230), comprises a plurality of electromagnets, and further comprising at least one first excitation switching means which is adapted to magnetize the plurality of electromagnets so as to impart desired magnetic polarities in at least one desired direction. The foldable antenna system (100) of claim 2 in combination with any one of claims 3 to 4, wherein the third magnetic arrangement (1300) comprises at least one permanent magnet, and wherein each of the first magnetic arrangement (1210), the second magnetic arrangement (1220) and the fourth magnetic arrangement (1230) comprises a plurality of layers of magnetically attractive material and magnetically repulsive material, which are arranged to impart desired magnetic polarities in at least one desired direction. The foldable antenna system (100) of claim 2 in combination with any one of claims 3 to 4, wherein the third magnetic arrangement (1300) comprises at least one electromagnet,and wherein each of the first magnetic arrangement (1210), the second magnetic arrangement (1220) and the fourth magnetic arrangement (1230) comprises a plurality of layers of magnetically attractive material and magnetically repulsive material, which are arranged to impart desired magnetic polarities in at least one desired direction,the foldable antenna system (100) further comprising at least one second excitation switching means which is arranged to magnetize the electromagnet so as to impart at least one desired magnetic polarity. A wireless communication device (300) comprising,- a housing (310),- at least one handle (320) which projects from the housing (310) and which is adapted to be grasped by at least one hand of a user,- at least one foldable antenna system (100) according to any one of claims 1 to 8,- at least one first cavity-projection coupling portion which is arranged at the support frame (110) of the foldable antenna system (100), and- at least one second cavity-projection coupling portion which is arranged at the housing (310), wherein, the second cavity-projection coupling portion is adapted to be removably coupled, by cavity-projection coupling, to the first cavity-projection coupling portion. The wireless communication device (300) of claim 9, wherein the housing (310) further comprises an open internal cavity (311) configured to receive a radio block, the wireless communication device (300) further comprising - a radio block, - at least one third cavity-protrusion coupling portion which is disposed at the open internal cavity (311), and - at least one fourth cavity-protrusion coupling portion which is disposed at the radio block, wherein the fourth cavity-protrusion coupling portion is configured to be removably coupled, by cavity-protrusion coupling, to the third cavity-protrusion coupling portion.

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