GB2608612A

GB2608612A - Antenna reflector

Info

Publication number: GB2608612A
Application number: GB2109705.0A
Authority: GB
Inventors: Celerier Douglas
Original assignee: Phoenixc4i Ltd
Current assignee: Phoenixc4i Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2023-01-11
Anticipated expiration: 2041-07-05
Also published as: EP4117118A1; GB202109705D0; GB2608612B

Abstract

A reflector 100 for reversibly attaching to an antenna structure 10 having at least one antenna 20 comprises: a reflecting section 110 comprising a plurality of reflecting elements 115; a support structure 130 configured to support the reflecting section and to reversibly transition between a collapsed configuration and a deployed configuration; and one or more fasteners 152, 154 for reversibly attaching the reflector to the antenna structure. The reflector preferably comprises at least two fasteners which, in the deployed configuration, are arranged to attach to the antenna structure at a plurality of positions along a length of the antenna structure, and are disposed at different locations along an axis substantially parallel to the reflecting elements. The support structure may comprise a foldable frame 130, or an inflatable bladder (230, Figure 3b) with a cover (240, Figure 3a). The fasteners may comprise a cap 154, a clamp, or a clip 152. The reflector can allow directional signal transmission and reduced power requirements to be achieved from an omnidirectional antenna.

Description

ANTENNA REFLECTOR

FIELD OF THE INVENTION

The present application relates to retrofit reflectors for attaching to antennae. In particular, the application relates to corner reflectors for attaching to antennae in order to amplify and direct radiofrequency communication signals. Particular embodiments relate to collapsible reflectors and particular embodiments relate to reflectors for connecting to dipole or monopole antennae.

BACKGROUND OF THE INVENTION

Omnidirectional antennae, such as dipole and monopole antennae, are often used for transmitting radiofrequency signals, particularly for communication over large distances. However, in environments where communication is required only in certain directions or where available power is constrained, such as for agriculture, fishing, emergency services, coastguard or military uses, antennae alone are often inadequate.

Some existing devices overcome this issue by integrating a reflector, such as a corner reflector or parabolic dish, with an antenna in order to direct signals emitted from the antenna in a particular direction. However, these are often bulky metallic structures that are permanently fixed, for example to masts or buildings, and as such are impractical for temporary or intermittent communication (such as from a vehicle) and where available space and weight are limited.

SUMMARY OF THE INVENTION

Aspects of the invention are set out in the independent claims and preferred features are set out in the dependent claims.

There is described herein a reflector for reversibly attaching to an antenna structure comprising at least one antenna, the reflector comprising: a reflecting section comprising a plurality of reflecting elements; a support structure configured to support the reflecting section and to reversibly transition between a collapsed configuration and a deployed configuration; and one or more fasteners for reversibly attaching the reflector to the antenna structure.

When attached to an antenna structure having an antenna, the reflector can enable shielding of signals emitted by the antenna in one or more directions. Specifically, the reflecting elements of the reflecting section can be aligned with the antenna by the support structure such that they obstruct the emitted signal from propagating in particular directions.

This can be particularly advantageous for situations where directional communication is desirable or necessary. For example, where previously positioning the antenna in a suitable location for transmission (e.g. near a building or geographical feature such as a hill or a valley) was required to block emitted signals in certain directions, the reflector can be used instead to achieve signal directionality. This means, the reflector can allow directional communication to be performed from any location, which is particularly advantageous in situations where sensitive information is being transmitted.

The reflector can also reduce the power requirement when operating an antenna with the reflector attached thereto for directional transmission. The reflecting section can reflect a portion of a signal emitted from the antenna back towards a particular transmission direction, meaning the signal strength in the transmission direction is greater than that when transmitting omnidirectionally without the reflector. Thus, for a given resulting signal strength in the transmission direction, the amount of power required to transmit the signal is smaller when using the reflector.

The fasteners for reversibly attaching the reflector to an antenna structure can allow the reflector to be attached to and detached from an antenna structure as often as required.

For example, the reflector may only be attached when directional communication is required. Where the reflector is used with a mobile antenna structure, for example on a vehicle, it can be transported only for journeys or missions where directional communication is anticipated, thus saving weight and space for journeys where such communication is not required.

Furthermore, the fasteners for reversibly attaching the reflector to an antenna structure can allow the reflector to be attached to and removed from an omnidirectional antenna, meaning a single antenna can be provided with both omnidirectional and directional communication capabilities and these capabilities can be easily switched between.

The support structure being configured to reversibly transition between a collapsed configuration and deployed configuration allow the reflector can be easily stowed for transport or storage. For example, when in the collapsed configuration, the reflector can occupy a smaller volume than in the deployed configuration. In addition, the reflector being reversibly attachable to an antenna structure means that it has a modular design. This can enable easy replacement of the reflector, for example if the reflector is damaged, without also having to replace the antenna or antenna structure.

The term "antenna' as used herein refers to an antenna for emitting electromagnetic waves omnidirectionally in at least one plane. An antenna may include but is not limited to a monopole antenna or a dipole antenna, and the antenna may be linearly polarised (such as horizontally or vertically) or circularly polarised. The term "antenna structure" as used herein refers to a structure including an antenna, wherein the structure supports, is coupled to and/or engages with the antenna. The structure can include but is not limited to a base, an adapter, a power source, electrical cabling, a mast, and/or a vehicle.

The reflector may be arranged for reversibly attaching to an omnidirectional antenna, preferably a dipole antenna. This can allow the signal emitted from the antenna to have a more uniform signal elevation pattern than, for example, a monopole antenna.

Wth the support structure in the deployed configuration, the reflecting section may comprise two non-parallel and substantially planar sections. The planar sections can allow signals emitted from the antenna to be reflected linearly across a range of frequencies and can provide a frequency response with good bandwidth. The reflecting section may comprise one or more curved reflecting surfaces. This can allow signals emitted from the antenna to be directed in a conical manner, providing greater signal energy in the transmission direction.

In the deployed configuration, each reflecting element may comprise a substantially linear reflecting element, preferably wherein each linear reflecting element is aligned substantially parallel to the other linear reflecting elements. Each reflecting element may be flexibly coupled to at least one of the other reflecting elements.

The reflector may comprise at least two fasteners. This can allow for better stability of the reflector than if a single fastener is used. In the deployed configuration, the fasteners may be arranged to attach to the antenna structure at a plurality of positions along a length of the antenna structure. In the deployed configuration, at least one of the fasteners may be arranged to attach to the antenna structure at a location near a base of the antenna structure. In the deployed configuration, at least one of the fasteners may be arranged to attach to the antenna structure at a location distal to the base, preferably at an end of the antenna. In the deployed configuration, the fasteners may be disposed at different locations along an axis substantially parallel to the reflecting elements.

In the collapsed configuration, the reflector may occupy a volume less than around 20% of a volume occupied by the reflector in the deployed configuration. In the collapsed configuration, the reflector may occupy a volume less than around 10% of a volume occupied by the reflector in the deployed configuration. This can allow for efficient packing of the reflector for storage and/or transportation. The support structure may be foldable. This can further improve the packing of the reflector when not in use.

The reflector may further comprise one or more support connectors each attached to at least two of the reflecting elements. The support structure may comprise: a support frame comprising a plurality of support members and a plurality of linkages coupling the support members, wherein the reflecting section is coupled to the support members of the support frame; and a plurality of attachment arms attached to the support frame.

At least one of the linkages and/or at least one of the attachment arms may be pivotable. This can allow the support structure to be folded when in the collapsed configuration. At least one of the linkages and/or at least one of the attachment arms may be telescopic. This can allow the size of at least a part of the support structure to be adjusted.

Advantageously, this can allow a size of the support structure to be reduced when in the collapsed configuration, and/or adjusted when in the deployed configuration for adjusting its shape.

The support frame and/or the attachment arms may be formed of a non-metallic material or of a material with low metallic content. This can ensure that only the reflecting section contains materials that absorb or reflect radiofrequency radiation and thus affect the transmission of signals from the antenna.

Each fastener may be attached to one of the attachment arms. At least one of the fasteners may comprise a cap configured to receive an end of the antenna. At least one of the fasteners may comprise a clip configured to engage the antenna. The clip may engage only with a portion of a circumference of the antenna facing towards the reflecting section. This can allow minimal reflecting or absorption of signals emitted from the antenna in the transmission direction. These features may be provided independently with any other features described herein.

The support structure may comprise an inflatable bladder. The support structure may comprise a covering disposed around the bladder. The covering can protect the inflatable bladder. The reflecting section may be attached to the covering, optionally being attached by sewing, weaving or adhesive. The fasteners may be attached to the covering. The fasteners may be attached to the bladder.

In the deployed configuration, the bladder may be in an inflated state, and in the collapsed configuration, the bladder may be in a deflated state. This can allow for a large difference in volume of the reflector between the deployed configuration and the collapsed configuration. Wth the support structure in the deployed configuration, the reflecting section may comprise two non-parallel and substantially planar sections. With the support structure in the deployed configuration, the support structure may comprise surfaces corresponding to the planar sections of the reflecting section. In the deployed configuration, the support structure may have a substantially prismatic shape, preferably a triangular prism.

At least one of the fasteners may comprise a strap configured to engage the antenna structure, optionally a hook and loop strap or an adjustable strap fastened with a clip. At least one of the fasteners may comprise a cap configured to receive an end of the antenna.

The reflector may further comprise an inflation valve in fluid communication with the bladder. This can allow the bladder to be inflated and deflated in a controlled manner, and to be sealed such that fluid contained therein cannot flow out of the bladder.

Any system feature as described herein may also be provided as a method feature, and vice versa. As used herein, means plus function features may be expressed alternatively in terms of their corresponding structure.

Any feature in one aspect of the invention may be applied to other aspects of the invention, in any appropriate combination. In particular, method aspects may be applied to system aspects, and vice versa. Furthermore, any, some and/or all features in one aspect can be applied to any, some and/or all features in any other aspect, in any appropriate combination.

It should also be appreciated that particular combinations of the various features described and defined in any aspects of the invention can be implemented and/or supplied and/or used independently.

BRIEF DESCRIPTION OF THE FIGURES

Methods and systems are described by way of example only, in relation to the Figures, wherein: Figure la shows a perspective view of an example reflector according to a first embodiment in a deployed configuration attached to an antenna structure; Figure 1 b shows a plan view of the reflector of Figure 1 a; Figure 1c shows a side view of the reflector of Figure 1 a; Figure ld shows a perspective view of the reflector of Figure la in a collapsed configuration; Figure le shows a plan view of a support structure of the reflector of Figure la in a collapsed configuration; Figure 2a shows a perspective view of another example reflector according to the first embodiment in a deployed configuration attached to an antenna structure; Figure 2b shows a side view of a support structure of the reflector of Figure 2a in a collapsed configuration; Figure 3a shows a perspective view of a reflector according to a second embodiment in a deployed configuration attached to an antenna structure; Figure 3b shows a plan view of the reflector of Figure 3a; Figure 3c shows a perspective view of a reflector according to the second embodiment in a deployed configuration attached to an antenna structure; Figure 3d shows a perspective view of the reflector of Figures 3a or 3c; Figure 3e shows a perspective view of the reflector of Figures 3a or 3c in a collapsed configuration; Figure 4a shows a perspective view of a reflector according to a third embodiment in a deployed configuration attached to an antenna structure; Figure 4b shows a plan view of the reflector of Figure 4a; Figure 4c shows a perspective view of the reflector of Figure 4a. DETAILED DESCRIPTION Referring to Figures la-2b, an example reflector 100 according to a first embodiment will now be described. The reflector 100 has a reflecting section 110, a support structure 130 and fasteners 150, and can be reversibly changed between a collapsed configuration and a deployed configuration. In the deployed configuration, the support structure 130 reversibly attaches to and supports the reflecting section 110, such that the reflecting section 110 maintains two planar sections 110a, 110b, which are non-parallel. The planar sections 110a, 110b form a corner area 112, and in some examples are coincident or meet at or near the corner area 112. The fasteners 150 are configured to reversibly attach to an antenna structure comprising an antenna 20.

In some examples, the reflecting section 110 comprises a plurality of reflecting elements 115 such as rods or wires. The rods 115 may be elongate and/or cylindrical. The rods 115 are formed of a material configured to reflect or absorb radiofrequency radiation, such as a metal or metal alloy including copper or steel, or a composite including carbon fibre.

Typically, in the deployed configuration, the rods 115 are aligned substantially parallel to each other and form the planar sections 110a, 100b. For example, rods 115a form the planar section 110a, and rods 115b form the planar section 110b. The rods 115 may be spaced evenly within the planar sections 110a, 110b, which can enable signals emitted from the antenna 20 to be reflected linearly across a range of frequencies and can provide a frequency response with good bandwidth, meaning the reflector 100 need not be re-tuned for signals emitted in different frequency ranges, for example if the antenna 20 has frequency-agile capabilities.. If the planar sections 110a, 110b do meet or are coincident, no reflecting elements such as rods 115 are disposed where the planar sections 110a, 110b meet. Therefore, there is a gap at a corner of the corner section 112, which can help align the reflector 100 with the antenna 20.

The rods 115a, 115b of each planar section 110a, 110b are attached to at least one other rod 115 in the respective planar section 110a, 110b. For example, the rods 115a, 115b in each planar section 110a, 110b can be attached to each other in a series configuration via support connectors 116 that are aligned substantially within the respective planar section 110a, 110b and substantially perpendicular to the rods 115a, 115b. The rods 115a, 115b of each planar section 110a, 110b can each be formed of one or more groups in which rods 115 are coupled to each other, for example in a series configuration, and the groups may be separable from one another and/or may be configured to fold relative to one another, for example when in the collapsed configuration. Alternatively, the rods 115a, 115b can be attached to each other in a series configuration as a single group of rods 115, for example via support connectors 116. The support connectors 116 may be formed of a flexible material, with low or no metal content such as a fabric or polymer, or the support connectors 116 may comprise rigid support connectors pivotably attached to the rods 115.

The rods 115 comprise at least two end rods 115' for attaching to the support structure 130. In some examples, as shown in Figures la-1d, groups of rods 115a, 115b each comprise two end rods 115'. The end rods 115' can be the same or similar shape and size as the other rods 115, or, as shown in Figures la and 2a, may be differently shaped. For example, the end rods 115' may be cylindrical with a larger diameter than a diameter of the rods 115 in order to facilitate more secure attachment to the support structure 130. Where the rods 115a, 115b each comprise two or more groups of rods foldable relative to each other, the end rods 115' may be foldable or splitable into two or more sections, for example about a midpoint along a length of the end rods 115'. In some examples, when folded, the end rods 115' may remain coupled to one another via a connecting cord or string.

The support structure 130 comprises a support frame made of linkages 135 arranged, in the deployed configuration, to support the reflecting section 110 such that they form the planar sections 110a, 110b. The linkages 135 include at least one spine linkage 136 for each planar section 110a, 110b, where each spine linkage 136 is configured to reversibly attach to the end rods 115' of the respective planar section 110a, 110b. In some examples, each spine linkage 136 is configured to reversibly attach to the end rods 115' via clips 137 that engage the end rods 115'. In some examples, the clips 137 are open clips that are circumferentially incomplete and are formed of a resilient material, such as a plastic. In this case, the end rods 115' are attached to the support structure 130 via a push fit engagement between the clips 137 and a portion of a surface of the end rods 115'. In some examples, one or more of the clips 137 may have flanges to facilitate removal of the end rods 115' from the clips 137.

At least two of the spine linkages 136 are connected. In preferable examples, they are connected via a central hub 138 located proximate the corner area 112, for example two or more spine linkages 136 may be pivotably attached to the hub 138. Alternatively or additionally, a spine linkage 136 may be connected directly to another spine linkage 136, for example via a pivotable connection. In some examples where there is a hub 138, one or more of the clips 137 may be provided by the hub 138. For example, as shown in Figure 1b, the end rods 115' positioned nearest to the corner area 112 in the deployed configuration engage with clips 137 provided in the hub 138, and the end rods 115' positioned furthest from the corner area 112 in the planar sections 110a, 110b engage with clips 137 provided on the spine linkages 136.

The linkages 135 further comprise at least one bracing linkage 139. The bracing linkage 139 is attached to at least two of the spine linkages 136, and in the deployed configuration, is aligned at non-parallel angles to the spine linkages 136 to which it connects. In some examples, as shown in Figures la, lb and 2a, the bracing linkage 139 connects slidably and pivotably at its ends to the two spine linkages 136. In the deployed configuration, the bracing linkage 139 prevents an angle between the spine linkages 136 from changing, thus preventing an angle between the planar sections 110a, 110b from changing. In some examples, in the deployed configuration, an angle between the planar sections 110a, 110b is around 90°, but this angle may be larger, such around 120° or around 180°. An angle of 90° provides effective increased signal gain in the transmission direction 30 and reduced signal gain behind the reflector 100. Larger angles can provide an increased signal transmission angle and thus a greater geographic coverage of signals emitted from the antenna 20.

The support structure 130 further comprises a plurality of attachment arms 140 which are attached to the support frame. Preferably, at least one of the attachment arms 140 is pivotably attached to the hub 138. In preferable examples, there are two attachment arms 140, including a first arm 142 which lies substantially in a plane defined by the spine linkages 136, and a second arm 144 which is pivotable relative to the first arm 142. The bracing linkage 139 may be a compound linkage pivotable about one or more locations along its length and attached at least slidably to the first arm 142, as shown in Figures la, lb and 2a. In some examples, the bracing linkage 139 is a compound linkage formed of two smaller linkages each pivotably and slidably attached to a different spine linkage 136 and pivotably and jointly slidably attached to the first arm 142.

In some examples, as shown in Figures 2a and 2b, the attachment arms 140 include a third arm 146. In the deployed configuration, the third arm 146 may lie substantially in a plane defined by the first arm 142 and the second arm 144, and that plane can be substantially perpendicular to the plane containing the spine linkages 136.

Each attachment arm 140 has a fastener 150 attached at an end of the attachment arm 140 which is not attached to the support frame. The fasteners 150 are arranged to reversibly attach to an antenna structure 10, permitting the reflector 100 to be reversibly attached to the antenna structure 10. The antenna structure 10 includes an antenna 20, and 9 in some examples, one or more of the fasteners 150 are arranged to reversibly attach to the antenna 20. In some examples, the fasteners 150 are made of a radiofrequency-transparent material that absorbs or reflects negligible amounts of radiofrequency radiation, such as a plastic or a composite, preferably containing no metal or carbon.

In preferable examples, the support structure 130 contains very little or no metal or carbon. More preferably, the reflecting section 110 is the only part of the reflector 100 made of materials which absorb or reflect radiofrequency radiation, such as metals or carbon.

Preferably, when the reflector 100 is in the deployed configuration and attached to an antenna structure 10, in a direction parallel to a length of the antenna 20 the reflecting section 110 has a dimension greater than or equal to the length of the antenna 20. By attaching the reflector 100 to the antenna structure 10, the reflecting section 110 is aligned with the antenna 20 (for example, where the rods 115 are parallel with the antenna 20) such that radiofrequency signals emitted from the antenna 20 in directions towards the reflecting section 110 are absorbed or at least partially reflected towards a predetermined transmission direction 30.

This enables the signal emitted from the antenna 20 to be made directional, and allows less power to be used, since the reflected portion of the signal provides an amplifying effect in the transmission direction 30.

The attachment arms 140 have fixed, predetermined lengths that, when the attachment arms 140 couple to the antenna structure 10 via fasteners 150, constrain the antenna 20 in a predetermined position relative to the reflecting section 110. The predetermined lengths and thus the predetermined position can be selected to achieve improved or optimal signal reflection by the reflector 100.

A first fastener 152 is attached to the first arm 142, and a second fastener 154 is attached to the second arm 144. Optionally, if a third arm 146 is present, as shown in Figures 2a and 2b, a third fastener 156 is attached to the third arm 146. As shown in Figures 1a, le and 2a, in some examples the first fastener 152 is a clip such as an open clip that is circumferentially incomplete and formed of a resilient material, such as a plastic. The open clip 152 is configured to reversibly attach to the antenna structure 10 via a push fit engagement between the open clip 152 and a straight portion of the antenna structure 10 such as the antenna 20. The clip 152 may have flanges to facilitate detachment from the antenna structure 10. If the clip 152 attaches directly to the antenna 20, the clip 152 may engage with only a portion of a circumference of the antenna 20 facing away from a predetermined transmission direction. In some examples, the clip 152 is configured to reversibly attach to the antenna structure 10 at a location near a base of the antenna structure 10. In other examples, the first fastener 152 may be a clamp configured to receive the antenna structure 10 between a pair of opposable jaws and clamp the antenna structure 10 by moving at least one of the jaws towards a closed position.

In the deployed configuration, the second fastener 154 is configured to reversibly attach to the antenna structure 10 at a location distal to a base of the antenna structure 10. For example, the second fastener 154 may be configured to reversibly attach to a free end of the antenna 20, in which case the second fastener 154 may be a cap. The cap 154 may be pivotably attached to the second arm 144, and is configured to receive the free end of the antenna 20 in a mating arrangement and/or attach to the antenna 20 via a push fit engagement.

Where there is a third arm 146, as shown in Figures 2a and 2b, the third fastener 156 is configured to reversibly attach to the antenna structure 10 at a different location from those of the first fastener 152 and the second fastener 154, and is typically pivotable relative to the third arm 146. In some examples, the third fastener 156 reversibly attaches to a base of the antenna structure 10, preferably via engagement between the third fastener 156 and the base for example using a screw, a pin, or a nut and bolt. The third fastener 156 can therefore further secure the reflector 100 to the antenna structure 10 to limit rotation of the reflector 100 about the antenna 20 or detachment of the reflector 100 from the antenna structure 10, for example in high winds. In an alternative embodiment, the third fastener may also be a clip or a strap.

The fasteners 150 are configured to reversibly attach to the antenna structure 10 from any direction, such that the reflector 100 can be attached to the antenna structure 10 and positioned facing any direction, meaning the transmission direction 30 can be adjusted. The direction may be adjusted manually including manipulation via guy ropes, or optionally via electromechanical actuators controlled remotely.

As shown in Figures 1d, le and 2b, in the collapsed configuration, the attachment arms 140 are detached from the antenna structure 10, and the reflector 100 occupies a smaller volume than in the deployed configuration. For example, the volume of the reflector 100 in the collapsed configuration is no more than around 20%, preferably less than 10%, of the volume of the reflector 100 in the deployed configuration. In some examples, when in the collapsed configuration, the reflector 100 may be stored in a container such a bag, optionally having dimensions of around 900 mm x 160 mm x 180 mm. In the deployed configuration, the reflector 100 may have a height from one end of an end rod 115' to another end of the end rod 115' of around 860 mm, a planar section width between end rods 115' of a planar section 110a or 110b of around 840 mm, and a distance between opposing end rods 115' located away from the corner area 112 of around 1340 mm.

In some examples, the support structure 130 is foldable such that in the collapsed configuration, it can be folded to make the spine linkages 136 substantially parallel to one another. In the collapsed configuration, the reflecting section 110 may remain attached to the support structure 130 such that the planar sections 110a, 110b become substantially parallel when the support structure 130 is folded. Alternatively, the reflecting section 110 can detach from the support structure 130 in the collapsed configuration.

In the collapsed configuration, the attachment arms 140 are aligned substantially parallel to one another. In some examples, at least one of the attachment arms 140 and at least one of the spine linkages 136 are pivotable, preferably about pivot points located near to the corner area 112. In preferable examples, as shown in Figures 1d, le and 2b, when in the collapsed configuration, the linkages 135 and attachment arms 140 are aligned substantially parallel to one another. Additionally or alternatively, at least one of the spine linkages 136 may be telescopic such that their length can be adjusted and/or such that they can be shortened when in the collapsed configuration.

In some examples, the hub 138 and/or one or more of the clips 137 located near the hub 138 are rotatable such that one or more of the planar sections 110a, 110b can pivot about their end rods 115' nearest to the corner area 112. This can allow angle between the planar sections 110a, 110b to be adjusted, preferably between 90°, 120° and 180° or to any angle between around 90° and around 180°. The one or more bracing linkages 139 being slidably and pivotably connected to the spine linkages 136 can allow the angle between the spine linkages 136, and thus between the planar sections 110a, 110b, to be adjusted. One or more of the linkages 135, such as the spine linkages 136 and/or the bracing linkages 139, may be telescopic in order to allow the support structure 130 to be adjusted for supporting the reflecting section 110 at different angles between the planar sections 110a, 110b. Additionally or alternatively, one or more of the linkages 135 may be removed and replaced by a corresponding linkage of a different length in order to accommodate different angles between the planar sections 110a, 110b.

Where the reflecting section 110 is detached from the support structure 130 in the collapsed configuration, the reflecting section 110 may be folded or rolled into one or more groups dependent on whether the rods 115 are attached as a single group of rods 115 or as 12 multiple groups of rods 115a, 115b. The folding or rolling of the reflecting section 110 is permitted by the flexible or pivotable support connectors 116, thus allowing the reflecting section 110 to be more compact in the collapsed configuration than in the deployed configuration.

Referring to Figures 3a-3e, an example reflector 200 according to a second embodiment will now be described. The reflector 200 has a reflecting section 210, a support structure and fasteners 250, and can be reversibly changed between a collapsed configuration and a deployed configuration. The support structure comprises an inflatable bladder 230 around which a covering 240 is disposed, and the support structure supports the reflecting section 210 such that the reflecting section 210 maintains two planar sections 210a, 210b which are non-parallel. The reflecting section 210 is at least temporarily attachable to the support structure. In some examples, the reflecting section 210 is permanently or reversibly attached to the bladder 230, or to the covering 240. In some examples, the reflecting section 210 is sewn into the covering 240 or may be received in one or more pockets or compartments provided by the covering 240. Where the reflecting section 210 is flexible, it may be attached to the bladder 230, for example integrally or via sewing or pockets or compartments in the bladder 230.

The reflecting section 210 is formed of a material configured to reflect or absorb radiofrequency radiation, such as a metal or metal alloy including copper or steel, or a composite including carbon fibre. In some examples, the reflecting section 210 comprises a plurality of elongate and/or cylindrical rods 215 which, in the deployed configuration, are aligned substantially parallel to each other. The rods 215 are preferably spaced evenly within the planar sections 210a, 210b. In other examples, the reflecting section 210 comprises one or more reflecting surfaces, such as a sheet or film. The reflecting section 210 (or rods 215 or surfaces thereof) may be removable from the covering 240 and/or the bladder 230 to which they are configured to attach.

As shown in Figure 3b, in the deployed configuration, the bladder 230 (shown as a dashed line) is in an inflated state such that it maintains the covering 240 in a deployed shape. The covering 240 comprises at least two surfaces 242 which, when the covering 240 assumes the deployed shape, correspond to the planar sections 210a, 210b. The covering 240 can therefore serve two purposes: it supports the reflecting section 210 and can protect the bladder 230 from being punctured or otherwise damaged.

In the deployed configuration, the reflecting section 210 is attached to the support structure adjacent and substantially parallel to the surfaces 242. For example, rods 215 can be inserted into pockets provided on the surfaces 242 (or on interior surfaces of the covering 240 corresponding to surfaces 242) such that the rods 215 collectively maintain the two planar sections 210a, 210b. The rods 215 may be secured in the pockets via sewing into the covering 240, or they may be secured via a reversibly securable flap integrally formed in the covering 240 at one end of the pockets to facilitate easy removal of the rods 215 from the covering 240.

In the deployed shape, the covering 240 also includes at least one connection surface 244 which comprises the fasteners 250. In some examples, the connection surface 244 is aligned substantially perpendicular to a predetermined transmission direction 30 of an antenna provided by an antenna structure 10. In some examples, the deployed shape of the covering 240 is a substantially prismatic shape, such as a triangular prism as shown in Figure 3a. The prismatic shape may be such that an angle between the planar sections 210a, 210b is around 90°, but this angle may be larger, such as around 120° or around 180°. An angle of 90° provides effective increased signal gain in the transmission direction 30 and reduced signal gain behind the reflector 100. Larger angles can provide an increased signal transmission angle and thus a greater geographic coverage of signals emitted from the antenna 20.

The covering 240 can be coloured or patterned independently of the bladder 230. This can allow the visibility of the reflector 200 to be increased or decreased, for example the covering can be camouflaged for military or wildlife monitoring purposes, or it can be given a bright and/or reflective colour or pattern for emergency services such as mountain rescue or coast guard uses. The covering 240 may be reversible, and optionally an interior and an exterior of the covering 240 may be differently coloured and/or patterned. This can allow the visibility of the reflector 200 to be changed, for example from one type of camouflage to another, or from camouflage to high-visibility, by turning the covering 240 inside-out.

The fasteners 250 are arranged to reversibly attach to an antenna structure 10, permitting the reflector 200 to be reversibly attached to the antenna structure 10. The antenna structure 10 includes an antenna 20, and in some examples, one or more of the fasteners 250 are arranged to reversibly attach to the antenna 20.

The fasteners 250 include at least one fastener 252 located near a base of the antenna structure 10, and at least one other fastener 254 located distal to the base, for example on a free end of the antenna 20. As shown in the example of Figure 3a, the fasteners 252, 254 can 14 include at least two substantially tubular sections slidably engageable with the antenna 20 such that each fastener 252, 254 receives a portion of the antenna 20 therein and is aligned axially with the antenna 20. Fasteners 252, 254 are attached to or integrally formed with the covering 240. One of the fasteners, such as fastener 254, can include a stop or other means for limiting axial movement of the antenna 20 within the fasteners 252, 254, thus fixing the position of the reflector 200 relative to the antenna structure 10 when attached to the antenna structure 10. For example, tube section 254 may be a closed tube in the form of a cap or pocket configured to receive therein a free end of the antenna 20 in a mating arrangement and/or attach to the antenna 20 via a push fit engagement.

In some examples, as shown in Figure 3c, the fastener 252 and/or the fastener 254 may comprise a strap configured to attach to the antenna structure 10. The strap 252, 254 may be of any form, such as a hook-and-loop mechanism, a toggle, a clip, a buckle or any other suitable means for receiving and securing the antenna structure 10. For example, fastener 252 and/or fastener 254 may be a strap configured to receive a portion of the antenna 20 and to reversibly secure the reflector 200 to said portion of the antenna 20. The fastener 254 may have a further strap configured to abut an end of the antenna 20 to prevent movement of the fastener 254 relative to the antenna 20 in at least one direction parallel to a length of the antenna 20.

In some examples, fastener 252 may be a strap configured to attach to the base of the antenna structure 10 or another part of the antenna structure 10 near the base. The strap 252 may be of any form, such as a hook-and-loop mechanism, a toggle, a clip, a buckle or any other suitable means for receiving and securing the antenna structure 10.

In preferable examples, in the deployed configuration, fasteners 252, 254 are separated, in a direction substantially parallel to the reflecting section 210, by a distance approximately equal to or greater than a dimension of the reflecting section 210 in that direction.

The fasteners 250 may further include a plurality of guy ropes 256 configured to reversibly attach to the antenna structure 10 or a nearby stationary structure such as the ground or a vehicle. The guy ropes 256 provide greater stability for the reflector 200 and help reduce unintended movement relative to the antenna structure 10, for example due to wind.

In some examples, each guy rope 256 attaches at a first end to a point on the covering 240, and is coupled at a second end to a fixed object, such as the ground. The points on the covering 240 to which the guy ropes 256 attach may be corners or edges of the covering 240, such as those between surfaces 242 and/or the connection surface 244. In some examples, as shown in Figure 3d, the antenna structure 10 may include a vehicle upon which the antenna 20 is disposed. The guy ropes 256 can improve the stability of the reflector 200 when attaching to an antenna structure 10 by securing the reflector 200 relative to a fixed object such as the ground, and can be used for a variety of environments or terrains.

The bladder 230, the covering 240 and the fasteners 250 are each made of a radiofrequency-transparent material that absorbs or reflects negligible amounts of radiofrequency radiation. The bladder 230 may be formed at least partially of an elastic material, for example a rubber, a rubber compound or a polymer. In some examples, the bladder 230 may be formed of a polyurethane film or polyurethane-coated nylon. The covering 240 may be formed at least partially of a polymer such as nylon, preferably which is flexible. The fasteners 250 may be formed of the same material as the covering 240, for example if they are integrally formed with the covering 240, or they may be formed of one or more different materials, such as a rigid plastic. In some examples, the fasteners 250 may be formed of a reinforced nylon resistant to tearing or ripping (such as a ripstop nylon), cotton, or a composite of both. In preferable examples, the reflecting section 210 is the only part of the reflector 200 made of materials which absorb or reflect radiofrequency radiation, such as metals or carbon.

The reflector 200 further includes a valve 235 which is in fluid communication with the bladder 230 and which is accessible via an opening in the covering 240. The valve 235 is configured to prevent inadvertent fluid flow therethrough and thus into or out of the bladder 230. For example, the valve 235 is used to inflate the bladder 230, to create a seal between an interior of the bladder 230 and the surrounding atmosphere, and to deflate the bladder 230 in a controlled manner. In some examples, the valve 235 has a cap or cover for covering an opening of the valve 235 when it is not being used to inflate or deflate the bladder 230. For example, the valve 235 may be a LeafieldTM C7 inflation/deflation valve.

In its inflated state, the bladder 230 contains a fluid, such as air or exhaust fluids from a vehicle, which is above atmospheric pressure. A pump or compressor may be used to inflate the bladder 230 by connecting the pump or compressor to the valve 235, or the valve 235 may be connected directly to a pressurised fluid outlet, such as an exhaust pipe of a vehicle or a vent.

As shown in Figure 3e, in the collapsed configuration, the covering 240 is detached from the antenna structure 10, and the reflector 200 occupies a smaller volume than in the deployed configuration. For example, the volume of the reflector 200 in the collapsed configuration is no more than 20%, preferably less than 10%, of the volume of the reflector 200 in the deployed configuration. In the example shown in Figure 3e, when in the collapsed configuration, the reflector 200 may be stored in a container 260 such a bag which has dimensions of around 820 mm x 150 mm x 150 mm. In the deployed configuration, the reflector may have a height parallel to surfaces 242, 244 of around 810 mm, a width of planar section 210a or 210b of around 710 mm, and a width of connection surface 244 of around 1000 mm.

The rods 215 may be flexible, which can allow the reflector 200 to occupy an even smaller volume when in the collapsed configuration, for example by reducing a length of the reflector 200 when collapsed. For example, in the collapsed configuration, the reflector 200 may occupy a volume less than around 5% of its volume when in the deployed configuration, and may be stored in a container 260 which has dimensions of around 410 mm x 150 mm x 150 mm.

In the collapsed configuration, the bladder 230 is in a deflated state. In the deflated state, the bladder 230 contains a volume of fluid no more than around 10%, preferably less than 1% of the volume of fluid contained in the inflated state. The fluid is preferably air or another gas or mixture of gases.

In some examples, in the collapsed configuration, the reflecting section 210 may be detached from the support structure. For example, the rods 215 may be removed from pockets in the covering 240. In other examples, in the collapsed configuration, the reflecting section 210 remains attached to the support structure. For example, particularly if the reflecting section 210 is attached to the bladder 230 or an inner surface of the covering 240 or if the reflecting section 210 is delicate, it may be impractical to detach the reflecting section 210 from the support structure each time the reflector 200 is changed from the deployed configuration to the collapsed configuration. In some examples, the reflecting section 210 is only removed from the covering 240 or bladder 230 if it is broken or needs replacing.

In the collapsed configuration, the bladder 230 may remain within the covering 240. Where the bladder 230 and the covering 240 are each formed of a flexible material, in the collapsed configuration, they may be jointly folded or rolled (as shown in Figure 3e) in order to be more compact. This can also allow for easier changing between the collapsed and deployed configurations.

Referring to Figures 4a-4c, an example reflector 300 according to a third embodiment will now be described. The reflector 300 has a reflecting section 310, a support structure 330 and fasteners 350, and can be reversibly changed between a collapsed configuration and a deployed configuration. The reflecting section 310 is at least temporarily couplable to the support structure 330. In some examples, the reflecting section 310 is coupled to the support structure 330 and is only detached therefrom if the reflecting section 310 is damaged or needs replacing. In the deployed configuration, the support structure 330 supports the reflecting section 310 such that the reflecting section 310 maintains two planar sections 310a, 310b, which are non-parallel. The fasteners 350 are configured to reversibly attach to an antenna structure 10 comprising an antenna 20.

The reflecting section 310 is formed of a material configured to reflect or absorb radiofrequency radiation, such as a metal or metal alloy including copper or steel, or a composite including carbon fibre. In some examples, the reflecting section 310 comprises a plurality of elongate reflecting elements 315 that, when in the deployed configuration, are aligned substantially parallel to each other. For example, the reflecting elements 315 may be chains, wires or rods. Preferably, the reflecting elements 315 are flexible and capable of being loaded in tension along their length, such as the rods 315 as shown in Figure 4a. The reflecting elements are described as rods in the embodiment below, but the skilled person will appreciate that this embodiment can equally be implemented using wire or chain reflecting elements or with a mixture of different types of reflecting elements.

In some examples, as shown in Figures 4a and 4b, in the deployed configuration each rod 315 is coupled at each end thereof to the support structure 330 via a loop 318 which is pivotably attached to the support structure 330. Typically, in the deployed configuration, the rods 315 are aligned substantially parallel to each other and form the planar sections 310a, 310b. For example, rods 315a form the planar section 310a, and rods 315b form the planar section 310b. The rods 315 may be spaced evenly within the planar sections 110a, 110b, which can enable signals emitted from the antenna 20 to be reflected linearly across a range of frequencies and can provide a frequency response with good bandwidth, meaning the reflector 300 need not be re-tuned for signals emitted in different frequency ranges, for example if the antenna 20 has frequency-agile capabilities. For example, the antenna 20 may be frequency-agile between around 1 MHz and around 1 GHz, or between around 200 MHz and around 500 MHz. If the planar sections 310a, 310b do meet or are coincident, no reflecting elements such as rods 315 are disposed where the planar sections 310a, 310b meet.

The support structure 330 is inflatable such that in the deployed configuration it is in an inflated state, and in the collapsed configuration it is in a deflated state. In preferred examples, the support structure 330 comprises a plurality of substantially hollow tube sections that are in fluid communication with one another. Thus, the tube sections form an inner cavity of the support structure 330 capable of being filled with a fluid, such as air or exhaust fluids from a vehicle. Preferably, the support structure 330 is capable of being filled with a pressurised fluid, such as pressurised air. In some examples, the fluid is pressurised to an extent such that the support structure 330 maintains a substantially rigid shape, for example which is capable of maintaining tension in the rods 315. In some examples, the fluid may be pressurised to a pressure of not more than around 20 psi (138 kPa), or between around 1 psi (7 kPa) and around 12 psi (83 kPa), preferably between around 4 psi (28 kPa) and around 8 psi (55 kPa).

The support structure 330 may comprise a bladder, such as a bladder formed by a plurality of tube sections, to which the reflecting section 310 is attachable at least temporarily. In some examples, the support structure 330 may also include a covering which, in the deployed configuration, is disposed around the bladder. The covering can be used to camouflage the reflector 300, and/or can be used to protect the bladder and the reflecting section 110.

In some examples, when inflated, the support structure 330 forms a substantially open structure, such as a lattice structure or a structure defining at least one open cell. For example, as shown in Figures 4a and 4b, the support structure 330 in the deployed configuration can comprise hollow tube sections which define edges of a substantially prismatic shape, such as a triangular prism. The prismatic shape may be such that an angle between the planar sections 310a, 310b is around 90°, but this angle may be larger, such as around 120° or around 180°. An angle of 90° provides effective increased signal gain in the transmission direction 30 and reduced signal gain behind the reflector 100. Larger angles can provide an increased signal transmission angle and thus a greater geographic coverage of signals emitted from the antenna 20.

The tube sections thus define an empty volume therebetween, for example through which fluids such as air may flow substantially unimpeded. This can provide the reflector 300 with a reduced cross-sectional area, meaning it can induce less aerodynamic drag, for 19 example resulting from wind. In some examples, as shown in Figure 4a, each rod 315 may be coupled at each end to a tube section of the support structure 330 such that, in the deployed configuration, the rod 315 is taut across a gap between the tube sections.

As shown in Figure 4b, the support structure 330 further includes a valve 335 which provides a sealable opening from the inner cavity of the support structure 330 to an exterior of the support structure 330. The valve 335 is configured to prevent inadvertent fluid flow therethrough, and thus into or out of the inner cavity. For example, the valve 335 is used to inflate the support structure 330, to create a seal between the inner cavity and the exterior, and to deflate the support structure 330 in a controlled manner. In some examples, the valve 335 has a cap or cover for covering an opening of the valve 335 when it is not being used to inflate or deflate the support structure 330. For example, the valve 335 may be a Leafield TM C7 inflation/deflation valve. A pump or compressor may be used to inflate the support structure 330 by connecting the pump or compressor to the valve 335, or the valve 335 may be connected directly to a pressurised gas outlet, such as an exhaust pipe of a vehicle or a vent.

The support structure 330 includes one or more connection surfaces which comprise the fasteners 350. In some examples, the one or more connection surfaces are aligned substantially perpendicular to a predetermined transmission direction 30 of the antenna 20. The fasteners 350 are arranged to reversibly attach to an antenna structure 10, permitting the reflector 300 to be reversibly attached to the antenna structure 10. In some examples, one or more of the fasteners 350 are arranged to reversibly attach to the antenna 20.

The fasteners 350 include at least one fastener (not shown in Figure 4a) located near a base of the antenna structure 10, and at least one other fastener 354 located distal to the base, for example on a free end of the antenna 20. As shown in the example of Figure 4a, the fastener 354 can include a substantially tubular sections slidably engageable with the antenna 20 such that the fastener 354 receives a portion of the antenna 20 therein and is aligned axially with the antenna 20. The fasteners 350 are attached to or integrally formed with the support structure 330. One of the fasteners, such as fastener 354, can include a stop or other means for limiting axial movement of the antenna 20 within the fasteners 350, thus fixing the position of the reflector 300 relative to the antenna structure 10 when attached to the antenna structure 10. For example, tube section 354 may be a closed tube in the form of a cap or pocket configured to receive therein a free end of the antenna 20 in a mating arrangement and/or attach to the antenna 20 via a push fit engagement.

In some examples, at least one of the fasteners 350 may comprise a strap configured to attach to the antenna structure 10. The strap 350may be of any form, such as a hook-andloop mechanism, a toggle, a clip, a buckle or any other suitable means for receiving and securing the antenna structure 10. For example, the fastener located near a base of the antenna structure 10 and/or the fastener 354 may be a strap configured to receive a portion of the antenna 20 and to reversibly secure the reflector 300 to said portion of the antenna 20. The fastener 354 may have a further strap configured to abut an end of the antenna 20 to prevent movement of the fastener 354 relative to the antenna 20 in at least one direction parallel to a length of the antenna 20.

In some examples, the fastener near a base of the antenna structure 10 may be a strap configured to attach to the base of the antenna structure 10 or another part of the antenna structure 10 near the base. The strap may be of any form, such as a hook-and-loop mechanism, a toggle, a clip, a buckle or any other suitable means for receiving and securing the antenna structure 10.

In preferable examples, in the deployed configuration, fasteners 350 are separated, in a direction substantially parallel to the reflecting section 310, by a distance approximately equal to or greater than a dimension of the reflecting section 310 in that direction (such as a length of the rods 315).

The fasteners 350 are configured to reversibly attach to the antenna structure 10 from any direction, such that the reflector 300 can be attached to the antenna structure 10 and positioned facing any direction, meaning the transmission direction 30 can be adjusted. The direction may be adjusted manually, including manipulation via guy ropes, or optionally via electromechanical actuators controlled remotely.

As shown in Figure 4c, the fasteners 350 may further include a plurality of guy ropes 356 configured to reversibly attach to the antenna structure 10 or a nearby stationary structure such as the ground or a vehicle. The guy ropes 356 provide greater stability for the reflector 300 and help reduce unintended movement relative to the antenna structure 10, for example due to wind. In some examples, each guy rope 356 is coupled at a first end to the support structure 330 and is coupled at a second end to a fixed object, such as the ground. The guy ropes 356 may be coupled to the support structure 330 via loops 358 which are pivotably attached to the support structure 330, as shown in Figures 4a and 4b. In some examples, the antenna structure 10 may include a vehicle upon which the antenna 20 is disposed. The guy ropes 356 can improve the stability of the reflector 300 when attaching to an antenna structure by securing the reflector 300 relative to a fixed object such as the ground, and can be used for a variety of environments or terrains.

The support structure 330 and the fasteners 350 are each made of a radiofrequencytransparent material that absorbs or reflects negligible amounts of radiofrequency radiation.

The support structure 330 is preferably flexible and may be formed at least partially of a polymer, such as nylon, a polyurethane film, or polyurethane-coated nylon. The fasteners 350 may be formed of the same material as the support structure 330, for example if they are integrally formed with the support structure 330, or they may be formed of one or more different materials, such as a rigid plastic. In some examples, the fasteners 350 may be formed of a reinforced nylon resistant to tearing or ripping (such as a ripstop nylon), cotton, or a composite of both. In preferable examples, the reflecting section 310 is the only part of the reflector 300 made of materials which absorb or reflect radiofrequency radiation, such as metals or carbon.

In the collapsed configuration, the reflector 300 occupies a smaller volume than in the deployed configuration. For example, the volume of the reflector 300 in the collapsed configuration is no more than 20%, preferably less than 10%, of the volume of the reflector 300 in the deployed configuration. In some examples, when in the collapsed configuration, the reflector 300 may be stored in a container 360. In the deployed configuration, the reflector 300 may have a height parallel to planar sections 310a, 310b of around 810 mm, a width of planar section 310a or 310b of around 710 mm, and a width perpendicular to the height and to the transmission direction 30 of around 1000 mm.

In the collapsed configuration, when deflated, the support structure 330 may contain a volume of fluid no more than around 10%, preferably less than 1%, of the volume of fluid contained when inflated in the deployed configuration.

Where at least the support structure 330 and reflecting section 310 are flexible, when in the collapsed configuration, the reflector 300 can be rolled or folded in order to be more compact. Optionally, in the collapsed configuration, the reflecting section 310 remains coupled to the support structure 330. For example, when changing the reflector 300 from the deployed configuration to the collapsed configuration, at least the support structure 330 and the reflecting section 310 may be jointly folded or rolled.

While specific reflectors are shown, any appropriate hardware may be employed. For example, reflecting sections may form at least partially curvilinear surfaces. In some embodiments, there may be more than two reflecting surfaces. Moreover, the fasteners may be adapted to any suitable fasteners that do not affect the operation of the antenna.

The above embodiments and examples are to be understood as illustrative examples. Further embodiments, aspects or examples are envisaged. It is to be understood that any feature described in relation to any one embodiment, aspect or example may be used alone, or in combination with other features described, and may also be used in combination with one or more features of any other of the embodiments, aspects or examples, or any combination of any other of the embodiments, aspects or examples. Furthermore, equivalents and modifications not described above may also be employed without departing from the scope of the invention, which is defined in the accompanying claims.

Claims

CLAIMS1. A reflector for reversibly attaching to an antenna structure comprising at least one antenna, the reflector comprising: a reflecting section comprising a plurality of reflecting elements; a support structure configured to support the reflecting section and to reversibly transition between a collapsed configuration and a deployed configuration; and one or more fasteners for reversibly attaching the reflector to the antenna structure.
2. The reflector according to claim 1 wherein the reflector is arranged for reversibly attaching to an omnidirectional antenna, preferably a dipole antenna,
3. The reflector according to claim 1 or 2, wherein with the support structure in the deployed configuration, the reflecting section comprises two non-parallel and substantially planar sections.
4. The reflector according to any preceding claim, wherein, in the deployed configuration, each reflecting element comprises a substantially linear reflecting element, preferably wherein each linear reflecting element is aligned substantially parallel to the other linear reflecting elements.
5. The reflector according to any preceding claim, wherein each reflecting element is flexibly coupled to at least one of the other reflecting elements.
6. The reflector according to any preceding claim, wherein the reflector comprises at least two fasteners; preferably wherein, in the deployed configuration, the fasteners are arranged to attach to the antenna structure at a plurality of positions along a length of the antenna structure; further preferably wherein, in the deployed configuration, at least one of the fasteners is arranged to attach to the antenna structure at a location near a base of the antenna structure, and at least one of the fasteners is arranged to attach to the antenna structure at a location distal to the base, preferably at an end of the antenna.
7. The reflector according to claim 6 wherein, in the deployed configuration, the fasteners are disposed at different locations along an axis substantially parallel to the reflecting elements.
8. The reflector according to any preceding claim, wherein at least one of the fasteners comprises a cap configured to receive an end of the antenna.
9. The reflector according to any preceding claim, wherein, in the collapsed configuration, the reflector occupies a volume less than around 20% of a volume occupied by the reflector in the deployed configuration.
10. The reflector according to any preceding claim, wherein the support structure is foldable.
11. The reflector according to any preceding claim, further comprising one or more support connectors each attached to at least two of the reflecting elements.
12. The reflector according to any preceding claim, wherein the support structure comprises: a support frame comprising a plurality of support members and a plurality of linkages coupling the support members, wherein the reflecting section is coupled to the support members of the support frame; and a plurality of attachment arms attached to the support frame.
13. The reflector according to claim 12, wherein at least one of the linkages and/or at least one of the attachment arms is pivotable; and/or wherein at least one of the linkages and/or at least one of the attachment arms is telescopic.
14. The reflector according to claim 12 or 13, wherein the support frame and/or the attachment arms are formed of a non-metallic material, and/or wherein each fastener is attached to one of the attachment arms.
15. The reflector according to any preceding claim, wherein at least one of the fasteners comprises a clip configured to engage the antenna, preferably wherein the clip engages only with a portion of a circumference of the antenna facing towards the reflecting section.
16. The reflector according to any of claims 1 to 9, wherein the support structure comprises: an inflatable bladder.
17. The reflector according to claim 16 wherein the support structure further comprises a covering disposed around the bladder.
18. The reflector according to claim 16 or 17, wherein the reflecting section is attached to the covering, optionally being attached by sewing, weaving or adhesive.
19. The reflector according to any of claims 16 to 18, wherein the fasteners are attached to the covering.
20. The reflector according to claim 16 wherein the fasteners are attached to the bladder.
21. The reflector according to any of claims 16 to 20, wherein, in the deployed configuration, the bladder is in an inflated state, and in the collapsed configuration, the bladder is in a deflated state.
22. The reflector according to any of claims 16 to 21 wherein with the support structure in the deployed configuration, the reflecting section comprises two non-parallel and substantially planar sections and the support structure comprises surfaces corresponding to the planar sections of the reflecting section.
23. The reflector according to any of claim 16 to 22 wherein, in the deployed configuration, the support structure has a substantially prismatic shape, preferably a triangular prism.
24. The reflector according to any preceding claim, wherein at least one of the fasteners comprises a strap configured to engage the antenna structure, optionally a hook and loop strap or an adjustable strap fastened with a clip.
25. The reflector according to any of claims 16 to 24, further comprising an inflation valve in fluid communication with the bladder.