WO2008017725A1 - Antenne réseau à commande de phase dotée de déphaseurs en réflexion - Google Patents

Antenne réseau à commande de phase dotée de déphaseurs en réflexion Download PDF

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Publication number
WO2008017725A1
WO2008017725A1 PCT/EP2007/058339 EP2007058339W WO2008017725A1 WO 2008017725 A1 WO2008017725 A1 WO 2008017725A1 EP 2007058339 W EP2007058339 W EP 2007058339W WO 2008017725 A1 WO2008017725 A1 WO 2008017725A1
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WO
WIPO (PCT)
Prior art keywords
antenna
stub
pcb
feed
radiating elements
Prior art date
Application number
PCT/EP2007/058339
Other languages
English (en)
Inventor
James Browne
Edwina Browne
Naomi Thompson
Justin Collery
Original Assignee
James Browne
Edwina Browne
Naomi Thompson
Justin Collery
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by James Browne, Edwina Browne, Naomi Thompson, Justin Collery filed Critical James Browne
Publication of WO2008017725A1 publication Critical patent/WO2008017725A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters
    • H01P1/185—Phase-shifters using a diode or a gas filled discharge tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
    • H01Q3/38—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters the phase-shifters being digital

Definitions

  • This invention relates to an antenna comprising a casing having a reflector defining a slot, a plurality of radiating elements, a feed harness comprising a plurality of feed tracks, each feed track being associated with one of the radiating elements and electrically connecting the feed harness to the radiating elements, and a printed circuit board (PCB) carrying the radiating elements and the feed harness, the PCB being mounted in the casing and protruding outwardly therefrom through the slot so that the radiating elements are on one side of the reflector and the feed harness is substantially on the other side of the reflector.
  • PCB printed circuit board
  • One such type of antenna is that disclosed in the applicants own PCT patent application numbers PCT/IB2004/004455 and PCT/EP2006/067163, the entire disclosures of which and in particular the disclosure relating to the specific constructions of antenna are incorporated herein by way of reference.
  • This type of antenna is seen as a particularly efficient, robust, lightweight, compact and cost effective to provide.
  • the present invention relates to improvements to this type of antenna in particular.
  • Antennae are widely used in wireless communications networks. It is often necessary to introduce a new antenna into the network to replace an existing faulty antenna or to cater for an increase in traffic on the network.
  • One major problem that is encountered when introducing a new antenna into the network is the interference caused by that new antenna on the existing antennae in the network. It is often necessary to carefully configure the new antenna and/or the existing antennae so that they do not significantly interfere with each other.
  • One of the most common ways of configuring an antenna is by tilting the antenna so that the coverage pattern of the antenna is modified.
  • an antenna comprising: a casing having a reflector defining a slot; a plurality of radiating elements; a feed harness comprising a plurality of feed tracks, each feed track being associated with one of the radiating elements and electrically connecting the feed harness to the radiating elements; a printed circuit board (PCB) carrying the radiating elements and the feed harness, the PCB being mounted in the casing and protruding outwardly therefrom through the slot so that the radiating elements are on one side of the reflector and the feed harness is substantially on the other side of the reflector; characterised in that the antenna further comprises: a controller; and at least one of the feed tracks having a phase shifting device responsive to the controller to electronically tilt the antenna, the phase shifting device comprising a stub track and an isolation means to prevent reflections to the input connected in series in the feed track.
  • a controller and at least one of the feed tracks having a phase shifting device responsive to the controller to electronically tilt the antenna, the phase shifting device comprising a stub track and an isolation means to prevent reflection
  • the tilt of the antenna may be altered in a relatively simple manner in a highly predictable way.
  • Each phase shifting device is individually adjustable, thus making the design much easier than might otherwise be the case.
  • the stub track is an open stub track.
  • the isolation means comprises a hybrid coupler.
  • the isolation means is a 90° hybrid coupler.
  • the isolation means comprises one of a rat race hybrid, a 3 port isolator (planar or non-planar) and a 4 port isolator (planar or non-planar). It is envisaged that other isolation means known in the art could also be provided.
  • an antenna in which the stub track is adjustable in length. By having an adjustable length track, it will be possible to have greater control over the amount of tilt produced. This will allow for a range of tilt angles to be achieved.
  • an antenna in which the stub track further comprises an stub trunk, an stub branch and a switching device operable to connect the stub branch to the stub trunk.
  • an antenna in which there are provided a plurality of stub branches and a plurality of switching devices, each of the stub branches having a switching device associated therewith, each of the switching d evices being operable to connect one of the stub branches to the stub trunk at a given time.
  • each of the stub branches will be able to provide a different amount of electronic tilt to the antenna and therefore the antenna will be more adjustable than would otherwise be the case.
  • this is seen as a particularly useful construction of antenna that will permit a significant amount of adjustability without requiring complex circuitry and furthermore a number of open stub tracks of varying length may be catered for in a simple manner.
  • an antenna in which the stub trunk and the stub branches are arranged in an asterisk configuration with the plurality of stub branches extending radially away from one end of the stub trunk. This is seen as a very compact configuration of antenna that will allow for the maximum amount of branches to be provided in the space provided.
  • an antenna in which the phase shifting device is mounted on a separate daughter PCB 1 the daughter PCB in turn being mounted on the PCB carrying the radiating elements and the feed harness.
  • the phase shifting device may be constructed separately from the antenna radiating elements and the feed harness, thereby simplifying construction.
  • an antenna in which there are provided a plurality of daughter PCBs each having a phase shifting device to electronically tilt the antenna thereon.
  • an antenna in which the stub track is an open stub track.
  • the stub track is not provided by a track having a short to ground but rather is a track that is disconnected at one end.
  • an antenna in which the plane of the daughter PCB is substantially perpendicular to the plane of the PCB carrying the radiating elements and the feed harness. This is seen as a simple way of mounting the daughter PCB on the main PCB.
  • an antenna in which the plane of the daughter PCB is substantially parallel to the plane of the PCB carrying the radiating elements and the feed harness.
  • This is seen as a very useful alternative way of mounting the daughter PCB that will allow for the daughter PCB to be mounted in the same casing as the remainder of the feed harness without requiring modification of the existing casing design.
  • This will facilitate retrofitting of the antenna with phase shifting into existing antenna casings thereby obviating the need to obtain supplementary planning permission for mounting a different antenna casing on a mast or other mount.
  • an antenna in which the daughter PCB is laminated on the PCB carrying the radiating elements and the feed harness.
  • the construction of the antenna is sped up and fi irthermore the overall cost of the antenna is reduced by obviating the need for co-axial connectors.
  • an antenna in which the PCB carrying the radiating elements and the feed harness is substantially U-shaped in cross- section and comprises a pair of legs bridged by a centre portion.
  • the PCB carrying the radiating elements and the feed harness is substantially U-shaped in cross- section and comprises a pair of legs bridged by a centre portion.
  • an antenna in which the phase shifting device comprises a hybrid coupler having a pair of open stub tracks connected to the 0° port and the ⁇ ° port of the hybrid coupler connected in series in the feed track.
  • the phase shifting device further comprises a 90° hybrid coupler having a pair of open stub tracks connected to the 0° port and the 90° port of the hybrid coupler. This is seen as a particularly preferred embodiment of antenna.
  • an antenna in which the pair of open stub tracks further comprise an open stub trunk, a plurality of open stub branches and a plurality of switching devices, each of the open stub branches having a switching device operable to connect that open stub branch to the open stub trunk.
  • an antenna in which the switching devices are positioned in the open stub branches at predetermined intervals proportional to a designated frequency wavelength.
  • an antenna in which there are provided a pair of switching devices connected in series in each stub branch.
  • an antenna in which the ⁇ trollable switching device comprises a diode.
  • This is a particularly simple and inexpensive device to use for the switching device that may be operated at very high frequencies. This has particular advantages as the antenna tilt angle may now be adjusted practically instantaneously and therefore a whole range of possibilities open up regarding the frequency and manner in which the tiltable antenna may be operated.
  • FET Field Effect Transistor
  • Figure 1 is a perspective view of one embodiment of antenna according to the present invention.
  • Figure 2 is a perspective view of an alternative embodiment of antenna according to the present invention.
  • Figure 3 is a diagrammatic representation of an antenna pattern having means to electronically tilt an antenna
  • Figure 4 is a diagrammatic representation of a phase shifting device according to the present invention.
  • FIG. 5 is an enlarged view of part of the phase shifting device shown in Figure
  • Figure 6 is an alternative construction of a phase shifting device
  • Figure 7 is an alternative construction of a phase shifting device
  • Figure 8 is a diagrammatic representation of an antenna pattern ground plane printed on a PCB for use in an antenna according to the present invention
  • Figure 9 is a diagrammatic representation of the reverse side of the antenna pattern shown in Figure 8;
  • Figure 10 is an enlarged view of portion of the antenna pattern of Figure 8 with phase shifting devices mounted on the PCB;
  • Figure 11 is an enlarged diagrammatic representation of a phase shifting device
  • Figure 12 is a diagrammatic representation of a dual polarised antenna pattern for use in an antenna according to the present invention.
  • Figure 13 is a diagrammatic representation of the reverse side (ground plane) of the antenna pattern shown in Figure 12;
  • Figure 14 is a diagrammatic representation of a PCB having the phase shifting devices for an antenna according to the present invention.
  • Figure 15 is a diagrammatic representation of a reverse side of the PCB shown in Figure 14;
  • Figure 16 is a diagrammatic representation of a daughter PCB mounted on the antenna of Figure 1 ;
  • Figure 17 is a diagrammatic representation of a daughter PCB mounted on the antenna of Figure 2.
  • FIG. 1 a perspective view of an antenna, indicated generally by the reference numeral 1 comprising a casing 3 having a reflector 5 defining a slot 7.
  • the antenna further comprises a PCB 9 carrying a plurality of radiating elements 11 and a feed harness (not shown) comprising a plurality J ⁇ feed tracks (not shown).
  • the PCB 9 is mounted in the casing 3 and protrudes outwardly therefrom through the slot 7 so that the radiating elements are located on one side of the reflector 5 and the feed harness is substantially located on the other side of the reflector.
  • the slot is dimensioned to be spaced apart from the radiating elements.
  • the antenna 21 comprises a U-shaped PCB 9 comprising a pair of legs 23, 25 bridged by a centre portion 27.
  • the antenna further comprises a signal reflective sheet 29 mounted on one side of the centre portion 27 and a signal amplifying patch 31 mounted on the other side of the centre portion.
  • a plurality of radiating elements and a feed harness (not shown) are printed on the PCB 9.
  • the U-shaped PCB is formed from a unitary sheet of PCB material by heating the PCB to of the order of 120° Celsius and thereafter bending the PCB about two fold lines 33, 35 parallel to the longitudinal axis of the unitary sheet.
  • the fold lines each have a radius of curvature of the order of between 1 mm and 3mm to avoid cracking the ground plane surface 37 of the PCB.
  • the PCB antenna pattern 41 comprises a feed harness 42 which in turn comprises a plurality of feed tracks 43.
  • the feed tracks connect the input 44 to the radiating elements 45.
  • a phase shifting device 47 is positioned in series in the feed tracks 43 intermediate the input 44 and the radiating elements 45.
  • FIG 4 is a diagrammatic representation of a phase shifting device according to the present invention, indicated generally by the reference numeral 51.
  • the means to electronically tilt an antenna 51 comprises a hybrid coupler 53 having an input 55, an output 57 and a pair of splitter ports 58(a), 58(b).
  • the hybrid coupler further comprises a pair of open stub tracks 59 (a) and 59(b) connected to the splitter ports 58(a), 58(b) respectively, each of which comprises an open stub trunk 61 and a plurality of open stub branches 63(a), 63(b), 63(c), 63(d) and 63(e).
  • All of the plurality of open stub branches, 63(a), 63(b), 63(c), 63(d) and 63(e), are of different length with respect to each other.
  • Each of the open stub branches has a pair of diodes 65 formed therein along their length.
  • a control line 66 with an inductor 67 therein is fed to each of the open stub branches and a connection to a DC earth 69 for the open stub trunk 61 is provided via a further inductor 71.
  • the first open stub track 59(a) is at 0° whereas the second open stub track 59(b) is at an angle of 90° offset with respect to the first open stub track 59(a).
  • the input 55 and the output 57 are connected in series with the track (not shown) of the antenna en route to the dipole half, and the diodes 65 are open until a DC voltage (in this case 1.1.V) is applied to one of the branches 63(a), 63(b), 63(c), 63(d) and 63(e) which causes the diodes in that branch only to close and therefore the length of the open stub track is changed, thereby altering the phase of the antenna and accordingly altering the tilt of the antenna.
  • a DC voltage in this case 1.1.V
  • the voltage is removed from that branch 63(a), 63(b), 63(c), 63(d) and 63(e) and applied to another branch 63(a), 63(b), 63(c), 63(d) and 63(e) to achieve the desired tilt. Again, this will alter the length of the track and thereby alters the tilt of the antenna. Therefore, the open stubs are essentially adjustable in length and they are able to achieve a digital phase shift.
  • the speed at which this may be achieved is limited primarily by the response times of the devices which are fast and therefore this opens up a number of possibilities to the application of the invention as it is conceivable that the phase and hence the tilt may be changed numerous times in quick succession in a relatively short period of time.
  • the pair of open stub track lengths are the same for a hybrid coupler but alter in length for the different half dipoles. It can be seen that such a configuration provides six alternative tilt angles from which to choose, one of which being provided when none of the stub branches are connected to the trunk and the other five being created when each one of the branches is connected to the trunk individually. Preferably, four alternative tilt angle configurations will be provided comprising three stub branches.
  • each of the branches 63(a), 63(b), 63(c), 63(d) and 63(e) is provided with a pair of diodes as this provides better isolation to the branch when it is in an open configuration however this will be understood to be optional and may not be necessary.
  • the provision of a pair of diodes is important when working at frequencies at 2.5 - 3 GHz and above.
  • the present invention will typically be utilised in application ranging in frequency from 1GHz up to 6GHz. If both stubs are of equal length there will be an adjustment of the phase at the output port leading to the dipole but little or no other adjustment to the incoming RF (AC) signal at the input 55.
  • the organisation of the stubs is such that each may be connected to a single feed track, will in certain embodiments, produce an asterisk shaped structure terminating in a stub trunk 61.
  • the stub trunk 61 is the common part of the stub commencing at the hybrid coupler port.
  • Each limb of the asterisk is a possible stub extension and becomes an active part of the stub when closed by a switch consisting at least one, but possibly two diodes connected in series.
  • the structure has the advantage that it does not require an RF connection to ground as some other implementations may require which is difficult to achieve when working in the range of 2.5 GHz. It is simpler to provide an open than a short at 2 GHz and above.
  • Figure 5 is an enlarged view of part of the means to electronically tilt an antenna shown in Figure 4. It can be seen that the diodes 65 are positioned at the root of the branch 63(b), 63(c). In this example, only one diode is shown. The remaining open stub branches, 63(a), 63(d) and 63(e) have been removed for reasons of clarity.
  • the control line 66 with an inductor 67 therein is led to the open stub branch 63(c) and on a voltage being applied to the control line 66 the open stub branch is effectively closed by closing tne diode 65 and this in turn makes the open stub branch 63(c) form part of the greater open stub track, increasing its length and therefore altering the phase and accordingly the tilt of the antenna.
  • FIG. 6 of the drawings there is shown an alternative embodiment where like parts have been given the same reference numerals as before.
  • the stubs are adjustable in length by inserting a plurality of switches, in this case diodes 65, at defined intervals along the stub 81. The intervals are proportional to the designated frequency wavelength.
  • a pair of stubs 81, 82 each of which is at the splitter port of a 90° hybrid coupler (not shown).
  • the second stub 82 is identical in structure and essentially a mirror image of the first stub 81.
  • the ⁇ tub is increased in length by gradually introducing more and more stub sections 83 or removing stub sections 83 as the case may be by controlling the control voltage 85 delivered to the stub section 83 via an inductor 87.
  • a capacitor 89 is provided intermediate each of the sections to remove any DC component from the branch. The capacitor blocks DC but permits passage of RF signals.
  • each section 83 is connected to ground 90 via a pair of diodes. The maximum possible phase shift is achieved by having the longest possible track.
  • the rightmost stub section 83 has 1.1V applied to it, all the other stub sections 83 to the left of the rightmost stub section 83 intermediate the rightmost section and the stub 81 will essentially be switched in to the stub section. Similarly, if the stub section second from the right is connected to the 1.1V, the stub sections 83 to the left of it will be switched in also but the stub section to the right, the rightmost section, will not be switched in to the stub.
  • the stub track 91 comprises a stub track 92 with a transistor 93, a capacitor 95 and a diode 97 forming a switching circuit.
  • the common length of the stub 91 is shorted at its end, and the DC power to the shorting diode switches 97 at intervals along its length is supplied via the transistor 93 and a very short grounded stub.
  • This variation deals with the problem of accurate track splitting to an extent and reduces the capacitor problem discussed above but increases the RF grounding problems.
  • a second stub 94 which has not been shown in its entirety may be identical in structure and essentially a mirror image of the first open stub 92.
  • an antenna indicated generally by the reference numeral 91 , comprising a mother printed circuit board (PCB) 93 on which there is mounted an input 95 and a plurality of radiating elements 97.
  • the radiating elements 97 are mounted in pairs and each radiating element 97 forms part of a dipole pair with its nearest neighbouring radiating element 97, separated by a small spacing gap 98 therebetween.
  • This side of the antenna 91 is referred to as the ground side and the radiating elements 97 are made from an electrically conducting material, in this case copper which is etched onto the mother PCB 93.
  • the feed harness 101 comprises a plurality of feed tracks 103 which supply power from the input 95 to the ⁇ ⁇ Jiating elements (not shown).
  • the feed harness is provided in a pattern that will provide a cosecant squared radiation pattern and by having the feed harness pattern implemented in copper or like material on a PCB it is simple to reproduce the cosecant squared pattern accurately over and over again.
  • the power varies from the top to the bottom, but is highest somewhere above the centre dipoles. This causes the side lobes to be minimised, both upper and lower symmetrically.
  • phase variations further reduce the upper lobe and increase the lower side lobe to approximate a cosecant squared pattern.
  • values designed to eliminate spikes in the upper side lobe are arrived at by experiment.
  • the phase changes required to create a five degree downtilt are progressively greater, though not uniformly, than those needed to create a one degree downtilt. It will be understood that as an alternative it would be possible to reduce the strength of radiation from the lower side lobe or provide a standard null filled antenna by choice of appropriate track configurations on the feed harness.
  • a number of spacers may be provided on both sides of the antenna mother board 93 in the case of having a slot in the reflector (not shown) uniformly larger than the width of the PCB. It can be seen that there are a number of gaps 105 in the feed tracks 103. These gaps correspond with the connectors 99 on the other side of the mother PCB 93.
  • the feed tracks 103 terminate in a hook portion 107, otherwise referred to as a quarter line stub.
  • the quarter line stub comprises a return leg 109 which corresponds and runs parallel to the spacer gap 98 between the radiating elements 97 on the other Ciide of the mother PCB. This acts to balance the power in the radiating elements of a dipole pair.
  • phase shifting means for use with the present invention.
  • the phase shifting means are mounted on a daughter PCB 111 which in turn may be mounted on the mother PCB 93 using the connectors 99.
  • the daughter PCB 111(a) in fact contains a solid track 113 of copper material and no additional tracks are provided, therefore this dipole pair is in fact kept constant relative the remaining dipoles and the remaining dipoles are changed to provide tilt.
  • the second daughter PCB 111(b) comprises a solid track, in this case a hybrid coupler 115 having a pair of open stubs 117 connected thereto. There is further provided a pair of switches 119 to switch the open stubs into the circuit which will have the effect of altering the phase to the associated dipole pair.
  • the phase shifting means comprises a pair of open stubs 117 which in turn comprise a pair of open stub trunks 118 and a plurality of open stub branches 121 , each of different lengths with respect to the other open stub branches associated with that particular open stub trunk 118.
  • a plurality of switching devices 123 are provided, at least one per open stub branch to allow the open stub branch to be selectively connected to the open stub stalk.
  • the control lines have been omitted for clarity. It can be seen that by providing appropriate phase shifting means along the length of antenna, the phase of the entire antenna may be altered in a controlled manner.
  • FIG. 12 and 13 of the drawings there is shown a typical antenna pattern for a dual polarised antenna pattern as commonly used in mobile telephony applications.
  • the antenna pattern is shown in a flat state prior to being folded about fold lines.
  • FIG. 12 shows the antenna feed harness 125, radiating elements 126 and feed tracks 127 with gaps 128 in the feed tracks. These gaps accommodate connectors for reception of hase shifting device.
  • Figure 13 shows the ground plane of the antenna pattern shown in Figure 12 with a plurality of holes 129 therein for mounting the signal reflective sheet (not shown) and the signal directing patches (not shown) as well as a number of vias 130 for reception of connections to a phase shifting device.
  • a daughter PCB 140 for mounting flat on a mother PCB (not shown).
  • the daughter PCB comprises a plurality of phase shifting devices 141 , each of which comprises a 90° hybrid coupler 143 having a pair of open stub trunks 145 and a plurality of open stub branches 147.
  • Control lines 148 are each provided with a diode 149 therein in a similar fashion to that described above. It can be seen that all of the phase shifting devices for the plurality of radiating devices may be provided on a single PCB. Referring specifically to Figure 15, there are shown a number
  • ⁇ f vias 151 which cooperate with vias on the mother PCB to connect the phase shifting devices in series in the feed tracks (not shown) to the radiating elements.
  • FIG. 16 there is shown one method of mounting the daughter PCB 111 on the mother PCB 9.
  • the daughter PCB is mounted on connectors 99 (only one of which is shown) substantially perpendicular to the mother PCB.
  • the phase shifting devices are on the daughter PCB 111 and the antenna pattern including radiating elements and feed tracks is printed on the mother PCB 9.
  • a controller 161 is provided on the mother PCB to send signals to the phase shifting devices to determine the branch (if appropriate) to be switched into the circuit to provide a certain amount of tilt to the antenna.
  • the controller will preferably have means to communicate with a remote central controller which may be a base station connected via a coaxial cable or a remote control station in a distant location in which case the controller may communicate using radio or other wireless communication means with the central controller.
  • the central controller or the base station may relay specific tilt angles to be implemented by the antenna and these are achieved by the controller 161 communicating with the phase shifting devices (not shown).
  • FIG. 17 of the drawings there is shown another method of mounting the daughter PCB 140 onto the mother PCB 9.
  • the daughter PCB 140 is mounted flat on or narallel to the leg 23, 25 of the U-shaped PCB 9.
  • the daughter PCB is laminated on to the U-shaped PCB and the electrical connection between the phase shifting devices on the daughter PCB 140 and the feed tracks on the mother PCB 9 are provided through vias through the PCB board.
  • a controller 161 is provided for controlling the degree of tilt.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

Antenne du type comprenant un boîtier doté d'un réflecteur définissant une fente. L'antenne comprend en outre une carte imprimée (PCB) (93) portant une pluralité d'éléments rayonnants (97) et un faisceau d'alimentation comprenant une pluralité de rubans d'alimentation. Un dispositif déphaseur permettant d'incliner l'antenne électroniquement comprend un stub (117) de préférence extensible longitudinalement pour offrir plusieurs choix d'inclinaison. Une pluralité de branches (121) de stub peuvent être couplées au stub (117) pour en modifier la longueur. Le dispositif déphaseur est en outre de préférence monté sur une carte imprimée fille (111) distincte, perpendiculairement ou parallèlement à la carte imprimée mère (93). L'invention permet donc d'obtenir un dispositif déphaseur plus compact et d'utiliser les boîtiers d'antenne existants.
PCT/EP2007/058339 2006-08-11 2007-08-10 Antenne réseau à commande de phase dotée de déphaseurs en réflexion WO2008017725A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IES2006/0596 2006-08-11
IE20060596 2006-08-11
IE20060724 2006-10-03
IES2006/0724 2006-10-03

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WO2008017725A1 true WO2008017725A1 (fr) 2008-02-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021096687A1 (fr) * 2019-11-12 2021-05-20 Commscope Technologies Llc Déphaseur à cavité et antenne de station de base
RU2751980C2 (ru) * 2018-08-28 2021-07-21 Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) Преобразовательный приемопередающий модуль цифровой антенной решетки с ортогональным управлением (варианты)

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Publication number Priority date Publication date Assignee Title
GB2013983A (en) * 1978-02-06 1979-08-15 Hazeltine Corp Phased array antennae
GB2162375A (en) * 1984-06-25 1986-01-29 Gen Electric Co Plc Phase shifting devices
WO2006003480A1 (fr) * 2004-04-01 2006-01-12 Stella Doradus Waterford Limited Construction d'antenne

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2013983A (en) * 1978-02-06 1979-08-15 Hazeltine Corp Phased array antennae
GB2162375A (en) * 1984-06-25 1986-01-29 Gen Electric Co Plc Phase shifting devices
WO2006003480A1 (fr) * 2004-04-01 2006-01-12 Stella Doradus Waterford Limited Construction d'antenne

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Title
KORI M H ET AL: "SWITCHED REFLECTION PHASE SHIFTER", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 22, no. 10, 8 May 1986 (1986-05-08), pages 550 - 551, XP002100293, ISSN: 0013-5194 *

Cited By (3)

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WO2021096687A1 (fr) * 2019-11-12 2021-05-20 Commscope Technologies Llc Déphaseur à cavité et antenne de station de base
US20220393347A1 (en) * 2019-11-12 2022-12-08 Commscope Technologies Llc Cavity phase shifter and base station antenna

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