GB2410130A - Planar phased array radio antenna for orbital angular momentum (OAM) vortex modes - Google Patents

Planar phased array radio antenna for orbital angular momentum (OAM) vortex modes Download PDF

Info

Publication number
GB2410130A
GB2410130A GB0401097A GB0401097A GB2410130A GB 2410130 A GB2410130 A GB 2410130A GB 0401097 A GB0401097 A GB 0401097A GB 0401097 A GB0401097 A GB 0401097A GB 2410130 A GB2410130 A GB 2410130A
Authority
GB
United Kingdom
Prior art keywords
spiral radiating
phase
circle
radiating element
offset
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB0401097A
Other versions
GB0401097D0 (en
Inventor
Julian Richard Trinder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Roke Manor Research Ltd
Original Assignee
Roke Manor Research Ltd
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 Roke Manor Research Ltd filed Critical Roke Manor Research Ltd
Priority to GB0401097A priority Critical patent/GB2410130A/en
Publication of GB0401097D0 publication Critical patent/GB0401097D0/en
Publication of GB2410130A publication Critical patent/GB2410130A/en
Withdrawn legal-status Critical Current

Links

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
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/27—Spiral antennas

Abstract

The antenna is able to transmit and receive radio transmissions that have an orbital angular momentum (OAM) polarisation in addition to a spin or circular polarisation. The antenna comprises a circular array of circularly polarised elements whose phase is controlled such that the phase of each element changes sequentially about the array. For an array having m elements equally spaced, and a OAM charge of n, the phase of each element will differ from its neighbour by 2 n/m radians. The antenna elements are preferably cavity backed axial mode spiral antennas. Figure 1 shows the arrangement for a charge 3 OAM antenna.

Description

PLANAR PHASED-ARRAY ANTENNAS
There is currently a great deal of research activity in the field of optics, based on photons with Orbital Angular Momentum (OAM). In addition to the familiar binary spin states of the photon, researchers have uncovered an infinite set of OAM states, characterized by vortex wavefronts. The photon OAM is strictly quantised in integer multiples of hl(2), i.e. 1.05459X10-34 Js. As is customary, the symbol h represents the Planck constant.
The following websites provide a useful introduction to the topic.
http://departments.colgate.edu/physics/research/optics/oamgp/gp.htm http://www.physics.gla.ac.uk/Optics/projects/singlePhotonOAM/ Extracts from these websites are filed with the present application. The OAM modes are usually generated by means of forked gratings (holograms) or stepped phase-plates. . The present invention provides a planar phasedarray antenna to create the OAM vortex modes at radio frequency, and accordingly provides a family of planar phased- ..
array OAM vortex antennas suitable for this purpose. ..
The invention accordingly provides: a phase array antenna for generating or receiving orbital angular momentum vortex mode radio signals, the antenna comprising a plurality of spiral radiating elements arranged in a circle, further arranged such that a signal applied to, or received by, each spiral radiating element is offset in phase in such a manner that the phase offset increases sequentially around the circle in either clockwise or anticlockwise direction.
The signal applied to, or received by, each spiral radiating element is offset in phase by an amount which may be calculated as follows: a reference direction is defined along a selected radius of the circle; the phase offset in the reference direction is taken to be zero; an angle a subtended at the centre of the circle in the direction of increasing phase offset by the selected radius and a radius passing through a selected spiral radiating element is measured or calculated; the phase offset to be applied to the selected spiral radiating element is calculated as n.a, where n represents the charge number of the orbital angular momentum vortex mode to be generated.
In a certain embodiment, the spiral radiating elements are arranged at a constant pitch around the circle, such that the signal applied to, or received by, each spiral radiating element is offset in phase by 2nnlm radians compared to a the preceding spiral radiating element in the direction of increasing phase offset, where n represents the charge number of the orbital angular momentum mode to be generated, and m represents the number of spiral radiating elements in the circle.
The phase array antenna may comprise spiral radiating elements arranged in a plurality of concentric circles, the phase offsets applied to each spiral radiating element being calculated separately for each circle. ; The spiral radiating elements may be cavity-backed axial mode spiral antennas. A...
The present invention also provides a method of generating orbital angular momentum vortex mode radio signals. The method comprises the steps of: arranging a number of spiral radiating elements in a circle; supplying each spiral radiating element with a signal offset in phase in such a manner that the phase offset increases sequentially around the circle in either clockwise or anticlockwise direction.
The phase offset to be applied to each spiral radiating element may be calculated by the following method: a reference direction is defined along a selected radius of the circle; the phase offset in the reference direction is taken to be zero; an angle a subtended at the centre of the circle in the direction of increasing phase offset by the selected radius and a radius passing through a selected spiral radiating element is measured or calculated; the phase offset to be applied to the selected spiral radiating element is calculated as n.a, where n represents the charge number of the orbital angular momentum mode to be generated.
In a certain embodiment, the spiral radiating elements are arranged at a constant pitch around the circle, such that the signal applied to each spiral radiating element is offset in phase by Denim radians compared to the signal applied to each neighbouring spiral radiating element, where n represents the charge number of the orbital angular momentum mode to be generated, and m represents the number of spiral radiating elements in the circle.
The present invention also provides a method of receiving orbital angular momentum vortex mode radio signals. The method comprises the steps of: arranging a number of spiral radiating elements in a circle; offsetting the signal received by each spiral radiating element in such a manner that the phase offset increases sequentially around the circle in either clockwise or anticlockwise direction; and summing the offset signals.
The phase offset to be applied to the respective signal received by each spiral radiating element may be calculated by the following method: a reference direction is defined along a selected radius of the circle; the phase offset in the reference direction is taken to be zero; an angle a subtended at the centre of the circle in the direction of increasing phase offset by the selected radius and a radius passing through a selected spiral radiating element is measured or calculated; the phase offset to be applied to the signal received by the selected spiral radiating element is calculated as n.a, where n represents the charge number of the orbital angular momentum mode to be received.
In a certain embodiment, the spiral radiating elements are arranged at a constant pitch around the circle, such that the signal received by each spiral radiating element is offset in phase by Denim radians compared to the signal received by a the preceding spiral radiating element in the direction of increasing phase offset, where n represents the charge number of the orbital angular momentum mode to be generated, and m represents the number of spiral radiating elements in the circle.
The spiral radiating elements may be arranged in a plurality of concentric circles, the phase offsets applied to each spiral radiating element being calculated separately for each circle.
The present invention also extends to an orbital angular momentum vortex mode radio signal such as may be generated or received by an antenna or by a method according to the invention.
The above, and further, objects, characteristics and advantages of the present invention will become more apparent from a consideration of the following description of certain embodiments, given by way of examples only, together with the accompanying drawing, wherein Fig. 1 represents a face-on view of a simple twelve-element phase-array antenna according to the present invention; and Fig. 2 represents a view as shown in Fig. 1, marked up to illustrate a method for the calculation of phase offsets to be applied to each spiral radiating element. .. .
The following description relates to a simple example, in order to illustrate the principle of the invention.
Fig. 1 represents the face-on view of a simple twelve-element phase-array according to the invention, comprising twelve cavity-backed axial-mode spiral antennas uniformly distributed around a circle.
Fig. I shows the twelve radiating elements (cavity-backed spirals) divided into three groups of four elements each. This embodiment of the invention represents an antenna suitable for generating a charge-3 OAM vortex radio signal, which results in an OAM of 3hl(2) per photon.
Around the periphery of the drawing of Fig. 1 are shown values that represent the phase offset of the corresponding spiral radiating element in radians. As is well known, a phase offset of 2n is equivalent to a phase offset of zero. Accordingly, the phase offsets illustrated in the drawing may be simply considered to be increasing in the clockwise direction at a rate of n/2 per element.
It is a feature of the present invention, that for generating an OAM vortex of charge-e with m spiral radiating elements arranged at a constant pitch around the circle, the phase increment between successive spiral elements shall be 2.nlm radians, to achieve a total phase offset difference around the circle of 2fc.n radians. In the example shown above, n = 3, m = 12, the phase increment is thus n/2 radians.
At the start of each group the nominal phase offset is reset to zero. This could also conceptually be considered as the phase offset reaching a value of 2. In the far-feld, that is to say, as viewed from a distance, this phase ramping and resetting around the circle of elements creates a vortex in the photon wavefront that is the essence of the quantum mechanical OAM mechanism. .
The number of spiral radiating elements in the circle is not critical to the invention. A . typical operational embodiment would normally include rather more than twelve .
elements. Moreover, the illustrated circular arrangement may be extended by adding A. extra concentric circles of spiral radiating elements, at different radii, in order to increase the antenna gain.
- ..
The invention is not limited to charge-3 OAM structures: an alternative scheme according to the invention, having four groups of radiating elements and providing a phase offset increasing at a rate of 2n per group, would produce a charge-4 OAM vortex structure, with OAM of 4hl(2) per photon, etc. An advantage to the grouping arrangement shown in Fig. l is that phase offset signals could be generated for the spiral radiating elements of one group. These signals could then be provided to the corresponding members of all groups. In the example shown in Fig. l, the incremental phase is achieved by having progressively increasing length of the quasi-radial connections.
On the other hand, if one were to require a charge-5 OAM vortex radio signal from the antenna of Fig. l, each spiral radiating element must have a phase offset of 2nx5/12 relative to its neighbour. This is not amenable to the generation of a single set of signals for application to corresponding elements in different groups, as twelve different signals would need to be generated. This could be achieved, for example, by providing progressively increasing length of the quasi-radial connections, or by the generation of suitably phased signals by other means which are then applied to the spiral radiating elements. Of course, a phased array antenna required specifically for generating a charge-5 OAM vortex radio signal would preferably have a number of spiral radiating elements in the circle which is a multiple of 5.
An alternative definition of the phase offsets to be applied to the various spiral radiating elements is illustrated in Fig. 2. A reference direction d may be defined along a selected radius 14 of the circle, preferably passing through one of the spiral radiating elements 10. The phase offset of the spiral radiating element in the reference direction d is taken to be zero. To calculate the required phase offset at another spiral radiating element, for example element 20, the angle a subtended at the centre of the circle by the selected radius 14 and a radius passing through selected .
spiral radiating element 20 in the direction of increasing phase offset must be measured or calculated. In the example shown in Fig. 2, the angle a is n/2 radians.
Again, using the example that n=3 - a charge-3 OAM vortex radio signal is required from the antenna - the phase offset to be applied to the signal of element 20 as compared to the phase offset of the spiral radiating element in the reference direction d is calculated as nay, in this case, 3. n/2.
It should be noted that the antenna according to the present invention is chiral at two levels. The cavity-backed axial-mode spiral antennas may be implemented in left or right circular polarised form, and the phase ramping and stepping may also be implemented in clockwise or anticlockwise form. The left or right spirals of the spiral antennas determine the binary photon spin state, and the clockwise or anticlockwise ramping pattern determines the sign of the induced OAM state.
The antenna feed lines, shown in Fig. 1 as radiating from a single point for each group, give an example method of achieving the ramping elemental phase shifts.
Other methods for achieving the same result will be apparent to those skilled in the art. The invention includes all embodiments employing any such other method of achieving the same ramping elemental phase shifts.
Those versed in the art of radio frequency engineering will realise that the phase stepping discussed above, always represents an effective step of 2 radians with respect to a monotonic circular phase-ramping function. For this reason, the invention also embraces any variant of the invention that implements a progressive circular phase ramp, consistent with an overall inter-element increment of 27.n/m radians as cited above.
It is a feature of the present invention, that transverse electromagnetic (TEM) modes of a transmitted signal are suppressed in the far-field boresight direction. This suppression of TEM in the bore-sight is a feature of the invention with many practical and useful applications. TEM modes will however be present in certain off bore-sight . : directions. TEM modes are equivalent to charge-0 OAM, and are thus orthogonal to. .-
all non-zero charge OAM modes. . . -.
The present invention accordingly provides a method of creating OAM vortex modes, using planar arrays of circular-polarised elements, phased in such a manner that they..
create a geometric phase characteristic. This leads to a phase vortex in the photon that is the essence of the quantum mechanical OAM.
Certain embodiments of the invention provide alternative ways of implementing the inter-element phase ramping increment of 2.nim radians, where m is the number of elements in the circle (being twelve in the embodiment illustrated in Fig. 1), that creates the photonic phase vortex, and hence the OAM mode, and n is the charge number of the mode to be generated.
Photon OAM is strictly quantised in integer multiples of hl(2rr), i.e. n. hl(2), where n is the charge number of the mode.
OAM modes can have positive or negative charge numbers, according to the sense of the geometric phase vortex. The polarity of the charge number may be selected in the antenna of the present invention by choosing clockwise or anti-clockwise directions for increasing phase offset of the radiating elements.
OAM modes have binary spin states, according to polarization. The spin state may be selected in the antenna of the invention my selecting clockwise or anti-clockwise polarization of the spiral radiating elements 10.
OAM modes are mutually orthogonal, unless their charge numbers and spin states match.
OAM modes are subject to the principle of reciprocity. Although the preceding description is given in terms of transmitting a signal from an antenna, by the principle or reciprocity it will be apparent to those skilled in the art that such antennas are equally suited to the receiving function.
TEM modes are suppressed in the antenna bore-sight direction.
TEM modes are equivalent to charge-0 OAM, and are thus orthogonal to all non-zero ' '.
charge OAM modes. A :.
. . . .- .e Aqua - e.

Claims (14)

  1. Claims 1. A phase array antenna for generating or receiving orbital
    angular momentum vortex mode radio signals, the antenna comprising a plurality of spiral radiating elements (10) arranged in a circle, further arranged such that a signal applied to, or received by, each spiral radiating element is offset in phase in such a manner that the phase offset increases sequentially around the circle in either clockwise or anticlockwise direction.
  2. 2. A phase array antenna as claimed in claim 1, wherein the signal applied to, or received by, each spiral radiating element is offset in phase by an amount which may be calculated as follows: a reference direction is defined along a selected radius (14) of the circle; the phase offset in the reference direction is taken to be zero; ; ' . . an angle a subtended at the centre of the circle in the direction of increasing ,.: phase offset by the selected radius (14) and a radius passing through a selected spiral radiating element (20) is measured or calculated; the phase offset to be applied to the selected spiral radiating element (20) is calculated as n.oc, where n represents the charge number of the orbital angular ; ,.
    momentum vortex mode to be generated. .
  3. 3. A phase array antenna as claimed in claim 2, wherein the spiral radiating elements are arranged at a constant pitch around the circle, such that the signal applied to, or received by, each spiral radiating element is offset in phase by 2n/m radians compared to a the preceding spiral radiating element in the direction of increasing phase offset, where n represents the charge number of the orbital angular momentum mode to be generated, and m represents the number of spiral radiating elements in the circle.
  4. 4. A phase array antenna according to any preceding claim, comprising spiral radiating elements arranged in a plurality of concentric circles, the phase offsets applied to each spiral radiating element being calculated separately for each circle.
  5. 5. A phase array antenna according to any preceding claim wherein the spiral radiating elements are cavity-backed axial mode spiral antennas.
  6. 6. A method of generating orbital angular momentum vortex mode radio signals comprising the steps of: - arranging a number of spiral radiating elements in a circle; - supplying each spiral radiating element with a signal offset in phase in such a manner that the phase offset increases sequentially around the circle in either clockwise or anticlockwise direction.
  7. 7. A method according to claim 6 wherein the phase offset to be applied to each spiral radiating element may be calculated by the following method: a reference direction is defined along a selected radius (14) of the circle; the phase offset in the reference direction is taken to be zero; ..
    an angle a subtended at the centre of the circle in the direction of increasing. ë
    phase offset by the selected radius (14) and a radius passing through a selected spiral. . radiating element (20) is measured or calculated; the phase offset to be applied to the selected spiral radiating element (20) is calculated as n.a, where n represents the charge number of the orbital angular momentum mode to be generated.
  8. 8. A method according to claim 7 wherein the spiral radiating elements are arranged at a constant pitch around the circle, such that the signal applied to each spiral radiating element is offset in phase by 2nn/m radians compared to the signal applied to each neighbouring spiral radiating element, where n represents the charge number of the orbital angular momentum mode to be generated, and m represents the number of spiral radiating elements in the circle.
  9. 9. A method of receiving orbital angular momentum vortex mode radio signals comprising the steps of: - arranging a number of spiral radiating elements in a circle; - offsetting the signal received by each spiral radiating element in such a manner that the phase offset increases sequentially around the circle in either clockwise or anticlockwise direction; and - summing the offset signals. s
  10. 10. A method according to claim 9 wherein the phase offset to be applied to the respective signal received by each spiral radiating element may be calculated by the following method: a reference direction is defined along a selected radius (14) of the circle; the phase offset in the reference direction is taken to be zero; an angle a subtended at the centre of the circle in the direction of increasing phase offset by the selected radius (14) and a radius passing through a selected spiral radiating element (20) is measured or calculated; the phase offset to be applied to the signal received by the selected spiral radiating element (20) is calculated as n.a, where n represents the charge number of the orbital angular momentum mode to be received.
  11. 11. A method according to claim 10 wherein the spiral radiating elements are arranged at a constant pitch around the circle, such that the signal received by each spiral radiating element is offset in phase by 2nnlm radians compared to the signal received by a the preceding spiral radiating element in the direction of increasing phase offset, where n represents the charge number of the orbital angular momentum mode to be generated, and m represents the number of spiral radiating elements in the circle.
  12. 12. A method according to any of claims 6-11 wherein the spiral radiating elements are arranged in a plurality of concentric circles, the phase offsets applied to each spiral radiating element being calculated separately for each circle.
  13. 13. A phase array antenna or method substantially as described and/or as illustrated in the accompanying drawings.
  14. 14. An orbital angular momentum vortex mode radio signal such as may be generated or received by an antenna or by a method according to any preceding claim.
GB0401097A 2004-01-19 2004-01-19 Planar phased array radio antenna for orbital angular momentum (OAM) vortex modes Withdrawn GB2410130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0401097A GB2410130A (en) 2004-01-19 2004-01-19 Planar phased array radio antenna for orbital angular momentum (OAM) vortex modes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0401097A GB2410130A (en) 2004-01-19 2004-01-19 Planar phased array radio antenna for orbital angular momentum (OAM) vortex modes

Publications (2)

Publication Number Publication Date
GB0401097D0 GB0401097D0 (en) 2004-02-18
GB2410130A true GB2410130A (en) 2005-07-20

Family

ID=31726391

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0401097A Withdrawn GB2410130A (en) 2004-01-19 2004-01-19 Planar phased array radio antenna for orbital angular momentum (OAM) vortex modes

Country Status (1)

Country Link
GB (1) GB2410130A (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008060674A2 (en) * 2006-06-19 2008-05-22 General Electric Company Radio detection and ranging intrusion detection system
WO2012084039A1 (en) * 2010-12-22 2012-06-28 Telefonaktiebolaget Lm Ericsson (Publ) An antenna arrangement
WO2012175629A1 (en) * 2011-06-24 2012-12-27 Università Degli Studi Di Padova A telecommunication method and apparatus exploiting the transmission and reception of electromagnetic waves
ITAR20120016A1 (en) * 2012-05-21 2013-11-22 Navis S R L ANTENNA SYSTEM FOR ELECTRONIC GENERATION AND RECEPTION OF ELECTROMAGNETIC RADIATION WITH ORBITAL ANGULAR MOMENT - SYSTEM ANTENNA FOR THE ELECTRONIC GENERATION AND RECEPTION OF ELECTROMAGNETIC RADIATION WITH ORBITAL ANGULAR MOMENTUM
CN103474776A (en) * 2013-09-22 2013-12-25 浙江大学 Method for generating radio frequency orbital angular momentum beams based on annular traveling wave antenna
CN103474777A (en) * 2013-09-22 2013-12-25 浙江大学 Loop traveling wave antenna generating radio frequency OAM on basis of metal ring cavity
WO2014016655A1 (en) 2012-07-24 2014-01-30 Eutelsat S.A. Modulation technique for transmitting and receiving radio vortices
WO2014104911A1 (en) 2012-12-26 2014-07-03 Huawei Technologies Co., Ltd Method and apparatus for generating electromagnetic beams
WO2015068036A1 (en) 2013-11-05 2015-05-14 Eutelsat S A Radio communications system and method based on time twisted waves
WO2015067987A1 (en) 2013-11-05 2015-05-14 Eutelsat S A System for transmitting and receiving radio frequency signals carrying complex harmonic modes
WO2015189653A1 (en) 2014-06-10 2015-12-17 Eutelsat S A Ofdm based orbital angular momentum system and method
CN105932428A (en) * 2016-03-30 2016-09-07 西安电子科技大学 Uniform circle array nesting-based electromagnetic vortex wave MIMO system receiving and transmitting antenna layout, vortex signal separation method and device
CN106058490A (en) * 2016-06-01 2016-10-26 电子科技大学 Method for generating vortex electromagnetic wave
CN106230133A (en) * 2016-07-28 2016-12-14 西安空间无线电技术研究所 A kind of energy based on vortex electromagnetic wave transmits system with information synergism
US20170062910A1 (en) * 2014-04-17 2017-03-02 Sony Corporation Wireless communication device and wireless communication system
EP3163766A1 (en) * 2015-10-27 2017-05-03 Intel Corporation Orbital angular momentum in millimeter-wave wireless communication
CN107039782A (en) * 2017-05-02 2017-08-11 西安电子科技大学 Array antenna for producing vortex electromagnetic wave
EP3211715A4 (en) * 2014-10-22 2017-10-18 Nec Corporation Wireless signal transmission antenna, wireless signal reception antenna, wireless signal transmission system, wireless signal transmission method, and wireless signal reception method
CN107331957A (en) * 2017-07-07 2017-11-07 西安电子科技大学 Mechanical reconfigurable array antenna produces the device and method of multi-modal orbital angular momentum
WO2017202393A1 (en) * 2016-05-24 2017-11-30 西安电子科技大学 High order vortex electromagnetic wave antenna, and high order vortex electromagnetic wave generating and receiving devices and methods
CN107994355A (en) * 2017-11-06 2018-05-04 中国运载火箭技术研究院 A kind of array antenna and its application method for suppressing the vortex electromagnetic wave energy angle of divergence
WO2018109518A1 (en) 2016-12-14 2018-06-21 Eutelsat S A Improved radio communications system and method based on time twisted waves
CN109450504A (en) * 2018-10-10 2019-03-08 西安电子科技大学 Demodulation method based on concentric circles uniform circular array antenna vortex electromagnetic wave
CN110050385A (en) * 2018-06-12 2019-07-23 东莞理工学院 A kind of bifilar helical antenna for realizing that OAM mode is restructural
CN110299609A (en) * 2019-05-24 2019-10-01 合肥工业大学 A kind of nested both arms flat helical antenna realizing more OAM modes and generating
WO2022151525A1 (en) * 2021-01-18 2022-07-21 中国科学院成都生物研究所 Method and device for generating synthetic vortex acoustic field having super-mode number
EP4167536A4 (en) * 2020-06-15 2024-03-20 Beijing Xiaomi Mobile Software Co Ltd Vortex wave phase offset determining method and apparatus, and storage medium

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105470638B (en) * 2016-01-13 2019-04-02 复旦大学 A kind of radial direction battle array orbital angular momentum multimode multiplexing antenna
CN108199135B (en) * 2018-01-11 2019-12-03 中南大学 OAM radio wave generation device
CN112909579A (en) * 2021-01-21 2021-06-04 伊犁师范大学 Multi-mode orbital angular momentum antenna

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS538546A (en) * 1976-07-13 1978-01-26 Mitsubishi Electric Corp Circular array antenna
WO2003102655A1 (en) * 2002-05-30 2003-12-11 The University Court Of The University Of Glasgow Photonic switch working in momentum-divison-multiple-access (mdma) mode for microwave and optical wavelengths based upon the measurement of the spin, the orbital angular momentum and the total angular momentum of the involved photo

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS538546A (en) * 1976-07-13 1978-01-26 Mitsubishi Electric Corp Circular array antenna
WO2003102655A1 (en) * 2002-05-30 2003-12-11 The University Court Of The University Of Glasgow Photonic switch working in momentum-divison-multiple-access (mdma) mode for microwave and optical wavelengths based upon the measurement of the spin, the orbital angular momentum and the total angular momentum of the involved photo

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008060674A3 (en) * 2006-06-19 2008-07-24 Gen Electric Radio detection and ranging intrusion detection system
WO2008060674A2 (en) * 2006-06-19 2008-05-22 General Electric Company Radio detection and ranging intrusion detection system
WO2012084039A1 (en) * 2010-12-22 2012-06-28 Telefonaktiebolaget Lm Ericsson (Publ) An antenna arrangement
WO2012175629A1 (en) * 2011-06-24 2012-12-27 Università Degli Studi Di Padova A telecommunication method and apparatus exploiting the transmission and reception of electromagnetic waves
ITAR20120016A1 (en) * 2012-05-21 2013-11-22 Navis S R L ANTENNA SYSTEM FOR ELECTRONIC GENERATION AND RECEPTION OF ELECTROMAGNETIC RADIATION WITH ORBITAL ANGULAR MOMENT - SYSTEM ANTENNA FOR THE ELECTRONIC GENERATION AND RECEPTION OF ELECTROMAGNETIC RADIATION WITH ORBITAL ANGULAR MOMENTUM
WO2014016655A1 (en) 2012-07-24 2014-01-30 Eutelsat S.A. Modulation technique for transmitting and receiving radio vortices
US9379926B2 (en) 2012-07-24 2016-06-28 Eutelsat S A Modulation technique for transmitting and receiving radio vortices
WO2014104911A1 (en) 2012-12-26 2014-07-03 Huawei Technologies Co., Ltd Method and apparatus for generating electromagnetic beams
CN103474776B (en) * 2013-09-22 2015-08-19 浙江大学 A kind of method producing radio frequency orbital angular momentum wave beam based on annular traveling wave antenna
CN103474776A (en) * 2013-09-22 2013-12-25 浙江大学 Method for generating radio frequency orbital angular momentum beams based on annular traveling wave antenna
CN103474777A (en) * 2013-09-22 2013-12-25 浙江大学 Loop traveling wave antenna generating radio frequency OAM on basis of metal ring cavity
CN103474777B (en) * 2013-09-22 2015-07-22 浙江大学 Loop traveling wave antenna generating radio frequency OAM on basis of metal ring cavity
US9794048B2 (en) 2013-11-05 2017-10-17 Eutelsat S A System for transmitting and receiving radio frequency signals carrying complex harmonic modes
WO2015068036A1 (en) 2013-11-05 2015-05-14 Eutelsat S A Radio communications system and method based on time twisted waves
WO2015067987A1 (en) 2013-11-05 2015-05-14 Eutelsat S A System for transmitting and receiving radio frequency signals carrying complex harmonic modes
US9929891B2 (en) 2013-11-05 2018-03-27 Eutelsat S A Radio communications system and method with increased transmission capacity
US9853799B2 (en) 2013-11-05 2017-12-26 Eutelsat S A Radio communications system and method based on time twisted waves
US10218056B2 (en) * 2014-04-17 2019-02-26 Sony Corporation Wireless communication device and wireless communication system
US20170062910A1 (en) * 2014-04-17 2017-03-02 Sony Corporation Wireless communication device and wireless communication system
WO2015189704A2 (en) 2014-06-10 2015-12-17 Eutelsat S A Radio communications system and method with increased transmission capacity based on frequency twisted waves
WO2015189703A2 (en) 2014-06-10 2015-12-17 Eutelsat S A Exploitation of frequency twisted waves in wireless communication systems to increase transmission capacity thereof
US10075321B2 (en) 2014-06-10 2018-09-11 Eutelsat S A Exploitation of frequency twisted waves in wireless communication systems to increase transmission capacity thereof
US9712367B2 (en) 2014-06-10 2017-07-18 Eutelsat S A Radio communications system and method with increased transmission capacity based on frequency twisted waves
WO2015189653A1 (en) 2014-06-10 2015-12-17 Eutelsat S A Ofdm based orbital angular momentum system and method
RU2667312C1 (en) * 2014-10-22 2018-09-18 Нек Корпорейшн Antenna wireless transmission signal, the antenna of the receiving wireless signal, wireless signal transmission system, wireless signal transmission method and wireless signal receiving method
EP3211715A4 (en) * 2014-10-22 2017-10-18 Nec Corporation Wireless signal transmission antenna, wireless signal reception antenna, wireless signal transmission system, wireless signal transmission method, and wireless signal reception method
US10177829B2 (en) 2014-10-22 2019-01-08 Nec Corporation Wireless signal transmitting antenna, wireless signal receiving antenna, wireless signal transmitting system, wireless signal transmitting method, and wireless signal receiving method
US10673511B2 (en) 2014-10-22 2020-06-02 Nec Corporation Wireless signal transmitting antenna, wireless signal receiving antenna, wireless signal transmitting system, wireless signal transmitting method, and wireless signal receiving method
US11115102B2 (en) 2014-10-22 2021-09-07 Nec Corporation Wireless signal transmitting antenna, wireless signal receiving antenna, wireless signal transmitting system, wireless signal transmitting method, and wireless signal receiving method
EP3163766A1 (en) * 2015-10-27 2017-05-03 Intel Corporation Orbital angular momentum in millimeter-wave wireless communication
US10511092B2 (en) 2015-10-27 2019-12-17 Intel Corporation Orbital angular momentum in millimeter-wave wireless communication
CN105932428A (en) * 2016-03-30 2016-09-07 西安电子科技大学 Uniform circle array nesting-based electromagnetic vortex wave MIMO system receiving and transmitting antenna layout, vortex signal separation method and device
US10498045B2 (en) 2016-05-24 2019-12-03 Xidian University High order vortex wave antenna and device and method for generating and receiving high order vortex wave
WO2017202393A1 (en) * 2016-05-24 2017-11-30 西安电子科技大学 High order vortex electromagnetic wave antenna, and high order vortex electromagnetic wave generating and receiving devices and methods
CN106058490A (en) * 2016-06-01 2016-10-26 电子科技大学 Method for generating vortex electromagnetic wave
CN106230133B (en) * 2016-07-28 2018-08-31 西安空间无线电技术研究所 A kind of energy based on vortex electromagnetic wave and information synergism Transmission system
CN106230133A (en) * 2016-07-28 2016-12-14 西安空间无线电技术研究所 A kind of energy based on vortex electromagnetic wave transmits system with information synergism
WO2018109518A1 (en) 2016-12-14 2018-06-21 Eutelsat S A Improved radio communications system and method based on time twisted waves
US10764019B2 (en) 2016-12-14 2020-09-01 Eutelsat S A Radio communications system and method based on time twisted waves
CN107039782A (en) * 2017-05-02 2017-08-11 西安电子科技大学 Array antenna for producing vortex electromagnetic wave
CN107331957A (en) * 2017-07-07 2017-11-07 西安电子科技大学 Mechanical reconfigurable array antenna produces the device and method of multi-modal orbital angular momentum
CN107994355A (en) * 2017-11-06 2018-05-04 中国运载火箭技术研究院 A kind of array antenna and its application method for suppressing the vortex electromagnetic wave energy angle of divergence
CN110050385A (en) * 2018-06-12 2019-07-23 东莞理工学院 A kind of bifilar helical antenna for realizing that OAM mode is restructural
CN110050385B (en) * 2018-06-12 2021-01-15 东莞理工学院 Double-arm helical antenna capable of realizing reconfigurable OAM (operation administration and maintenance) mode
CN109450504A (en) * 2018-10-10 2019-03-08 西安电子科技大学 Demodulation method based on concentric circles uniform circular array antenna vortex electromagnetic wave
CN110299609A (en) * 2019-05-24 2019-10-01 合肥工业大学 A kind of nested both arms flat helical antenna realizing more OAM modes and generating
EP4167536A4 (en) * 2020-06-15 2024-03-20 Beijing Xiaomi Mobile Software Co Ltd Vortex wave phase offset determining method and apparatus, and storage medium
WO2022151525A1 (en) * 2021-01-18 2022-07-21 中国科学院成都生物研究所 Method and device for generating synthetic vortex acoustic field having super-mode number
US11523211B2 (en) 2021-01-18 2022-12-06 Chengdu Institute Of Biology, Chinese Academy Of Sciences Method and device for generating synthetic vortex sound field with more mode number

Also Published As

Publication number Publication date
GB0401097D0 (en) 2004-02-18

Similar Documents

Publication Publication Date Title
GB2410130A (en) Planar phased array radio antenna for orbital angular momentum (OAM) vortex modes
Yang et al. A study of phase quantization effects for reconfigurable reflectarray antennas
US20030076274A1 (en) Antenna arrays formed of spiral sub-array lattices
Dessouky et al. Optimum normalized-Gaussian tapering window for side lobe reduction in uniform concentric circular arrays
Shamonina et al. Maximum directivity of arbitrary dipole arrays
US8279118B2 (en) Aperiodic antenna array
Bianchi et al. Randomly overlapped subarrays for reduced sidelobes in angle-limited scan arrays
US3553706A (en) Array antennas utilizing grouped radiating elements
Mangoud et al. Design of time modulated concentric circular and concentric hexagonal antenna array using hybrid enhanced particle swarm optimisation and differential evolution algorithm
US6525697B1 (en) Archimedes spiral array antenna
US6115005A (en) Gain-optimized lightweight helical antenna arrangement
JP3923431B2 (en) Antenna device
Zhao et al. Synthesis of sparse concentric ring arrays based on Bessel function
Braun et al. Aperture arrays for the SKA: Dense or sparse?
Albagory et al. An approach for low sidelobe beamforming in uniform concentric circular arrays
US11502418B2 (en) Network for forming multiple beams from a planar array
Aljahdali et al. A modified array processing technique based on Kaiser window for concentric circular arrays
Rao et al. Generation of dual beams from spherical phased array antenna
Kumar et al. Phase only pattern synthesis for antenna array using genetic algorithm for radar application
Bucci et al. On the optimal synthesis of shaped beam sparse arrays having uniform amplitude excitations
Lu et al. Compact planar sparse array antenna with optimum element dimensions for SATCOM ground terminals
Yang et al. Investigation of sparse near‐field focusing array antenna with different topologies
JP2005136542A (en) Array antenna apparatus and designing method thereof
Guo et al. A Design of Single-Feed Quad-Beam Antenna Using Phase Shifting Surfaces
Mailloux Subarray technology for time delayed scanning arrays

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)