EP3010083A1 - Phasenschieber - Google Patents

Phasenschieber Download PDF

Info

Publication number
EP3010083A1
EP3010083A1 EP14189204.2A EP14189204A EP3010083A1 EP 3010083 A1 EP3010083 A1 EP 3010083A1 EP 14189204 A EP14189204 A EP 14189204A EP 3010083 A1 EP3010083 A1 EP 3010083A1
Authority
EP
European Patent Office
Prior art keywords
phase shifter
signal line
signal
tuneable
portions
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Withdrawn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
EP14189204.2A
Other languages
English (en)
French (fr)
Inventor
Mario Schühler
Martin Leyh
Frank Mayer
Michael Schlicht
Rainer Wansch
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority to EP14189204.2A priority Critical patent/EP3010083A1/de
Publication of EP3010083A1 publication Critical patent/EP3010083A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters
    • H01P1/184—Strip line phase-shifters

Definitions

  • the present invention relates to a phase shifter and, in particular, to a phase shifter configured to provide an adjustable phase shift to a signal transmitted via a signal line.
  • the invention relates to a wireless communication device comprising such a phase shifter.
  • phased array antennas that allow for an optimal steering of the radiation characteristics.
  • the phased array is able to adapt its radiation characteristics according to the instantaneous situation. That is, the main beam of radiation can be electronically aligned towards the remote station, independent of the relative orientation between both. This leads to a high signal quality and reliable transmission without any mechanical re-orientation of the antenna.
  • the beam forming in a phased array relies on the phase progression along the radiating aperture. This phase progression is generated by an excitation network, which allows electronical variation of the phase of the signal to be transmitted or the signal received.
  • a key component of phased arrays is therefore a phase shifter.
  • the phase shifter is a two-port device that introduces a tuneable phase lag to the passing signal between the input port and the output port.
  • the phase lag can be tuned via an electrical signal.
  • the tuning can be done continuously or in discrete steps.
  • an analogue signal is applied to the phase shifter.
  • a continuously tuneable phase shifter provides an arbitrary phase shift, it is more sensitive to temperature variations, manufacturing tolerances and alike.
  • Application of continuously tuneable phase shifters therefore needs means for calibration to compensate for phase errors.
  • the phase shift can only be varied within a limited set of steps, restricting the beam forming capabilities in a phased array.
  • discrete tuneable phase shifters are usually less sensitive to environmental variations or manufacturing tolerances and might therefore be easier to implement with lower calibration effort.
  • Fig. 4a to 4c show single sections of so-called switched-line phase shifters using series switches and shunt switches, respectively.
  • Fig. 4a shows series switches
  • Fig. 4b shows shunt switches
  • Fig. 4c shows an example implementation using switching shunt diodes D1 to D4. Examples of such phase shifters are described in R. V. Garver, "BroadBand Diode Phase Shifters," IEEE Transactions on Microwave Theory and Techniques, vol. 20, no. 5, pp. 314-323, May 1972 ; and S. K. Koul and B.
  • a switched-line phase shifter of N sections with a total phase shift of 360 degrees has a resolution of 360°/2 N .
  • N 3 the resolution amounts 45°.
  • a phase shift can also be achieved by tuning of material characteristics, i.e., the electrical length of the line is altered rather than the mechanical length thereof.
  • a variation of ⁇ r or ⁇ r causes a variation of k and, therefore, a varying phase.
  • Non-linear dielectrics include so-called ferroelectrics, a solid mixture (e.g. mixtures of Barium, Strontium, and Titanate), and so-called liquid crystals (LC). Applying an electric field of proper strength to a non-linear dielectric causes a variation of the permittivity and, therefore, of the phase.
  • FIG. 5 An example of a LC-type microstrip-line phase shifter is shown in Fig. 5 .
  • the phase shifter comprises a first substrate 10 and a second substrate 12, which are shown separate from each other in Fig. 5 .
  • the substrates are attached to each other in the phase shifter.
  • a microstrip line 16 is provided on the surface of the first substrate 10, which is attached to the second substrate 12.
  • a liquid crystal mixture 18 is filled in a recess in the second substrate 12, which extends up to the surface of the second substrate12, which is attached to the first substrate 10, and the first substrate 10 supporting the microstrip line 16 serves as a cover for the liquid crystal mixture 18.
  • the liquid crystal mixture 18 is arranged adjacent to the microstrip line 16 and the phase shift provided to a signal transmitted via the microstrip line 16 can be varied by varying the permittivity of the liquid crystal mixture 18.
  • phase shifters featuring LC mixtures rely on a continuous variation of the permittivity, such as those described in C. Weil, G. Luessem, R. Jacoby, "Tunable Inverted Tunable Inverted-Microstrip Phase Shifter Device Using Nematic Liquid Crystals, "Microwave Symposium Digest, 2002 IEEE MTT-S International (Vol. 1), 2-7 June 2002, Seattle, WA, USA, pp. 367-371 ; and S. Müller et al., “Tunable Passive Phase Shifter for Microwave Application using Highly Anisotropic Liquid Crystals," Microwave Symposium Digest, 2004 IEEE MTT-S International (Vol. 2), 6-11 June 2004 .
  • Variations caused by temperature variations, for example have therefore to be monitored and considered for the biasing of the LC mixture. This holds also for ferroelectric and ferrite-based solutions. Phased arrays comprising tens or hundreds of phase shifters need much effort for calibration.
  • UHF phase shifter is described in US 5 936 484 A , which comprises a microstrip line deposited on a substrate plate made of insulating material having high permittivity, such as alumina. A second substrate is attached to the substrate by spacers and liquid crystal material is arranged in a sealed space between the substrates, which is adjacent to the microstrip line. A DC voltage is applied to the microstrip line in order to vary the permittivity of the liquid crystal material.
  • Phase shifters including a plurality of microstrip lines in parallel, which constitute independently controllable phase shifters are also disclosed.
  • Phase shifters comprising an adjustable phase shift are also disclosed in US 2004/0041664 A1 and US 2001/0017577 A1 .
  • Liquid crystal materials usable in phase shifters are disclosed in US 2005/0067605 A1 and US 2014/0022029 A1 .
  • phase shifter having improved characteristics, in particular a phase shifter which may have at least one of stable characteristics, a wide tuning range and a high resolution.
  • Embodiments provide a phase shifter comprising a signal input, a signal output, a signal path between the signal input and the signal output, and a plurality of sections, each section of the plurality of sections comprising a signal line portion and an associated material portion having a characteristic that is tuneable to apply an adjustable phase shift to a signal transmitted over the signal line portion, wherein the characteristic of the material of each section is tuneable individually, wherein the signal line portions are connected in series in the signal path or wherein the phase shifter is configured to switch the signal line portions in series in the signal path
  • Embodiments are based on the recognition that a phase shifter having stable characteristics can be implemented by subdividing the phase shifter into a plurality of serial sections which can be tuned individually.
  • the characteristic of the sections may be tuned continuously, in discrete steps or, as in preferred embodiments, in a binary manner between two values of the characteristic only.
  • the total phase shift provided between a signal input and a signal output can be adjust in a flexible manner by controlling each section individually. For example, it is possible to adjust the total phase shift provided by the phase shifter over a wide range.
  • the tunable characteristic of the material portions is the refractive index of the material portions.
  • the refractive index of the material portions is tunable by varying the permittivity or the permeability of the material portions.
  • the phase shifter comprises, for each section, means for controlling the tunable characteristic of the material portion, wherein the means for controlling are provided in addition to the signal line portion.
  • the means for controlling may comprise one or two electrodes configured to apply a variable electric field to the corresponding material portion in order to change the permittivity thereof or may comprise an element or a magnet configured to apply a variable magnetic field to the corresponding material portion in order to change the permeability thereof.
  • the material portions comprise a non-linear dielectric selected from the group including at least ferroelectrics, solid mixtures of barium, strontium and titanate, and liquid crystal mixtures.
  • the material portions comprise ferrite materials
  • the signal line portions of at least some of the sections have different lengths.
  • the lengths of the signal line portions are dimensioned based on a scheme b n- 1 ⁇ x with b and n being natural numbers and and ⁇ x being the length of the section having the shortest signal line portion.
  • the means for controlling are configured to switch the characteristic of the material portion between a respective first value and a respective second value only.
  • embodiments permit partitioning a line of a tuneable electrical signal length into a number of sections, wherein the characteristic (such as the refractive index) of each section is tuned between its minimum and its maximum only.
  • the signal line portions are arranged on a surface of a first substrate, wherein the material portions are arranged in a second substrate, and wherein the first substrate and the second substrate are attached to each other so that the signal line portions are arranged adjacent to the material portions.
  • the phase shifter can be implemented in an easy and compact manner.
  • the signal line portions of the plurality of sections form a common signal line coupled between the signal input and the signal output of the phase shifter and wherein the material portions of the sections are arranged side by side along the length of the common signal line.
  • the phase shifter comprises at least one non-tuneable signal line portion associated with one of the sections, and switches configured to switch into the signal path either the signal line portion of the one of the sections or the associated non-tuneable signal line portion.
  • the phase shifter may comprise a respective non-tuneable signal line portion associated with each section and switches configured to switch into the signal path either the signal line portion of the respective section or the associated non-tuneable signal line portion.
  • Embodiments provide a phase shifter system comprising a phase shifter having a plurality of sections, a non-tuneable signal line portion, and switches configured to switch into the signal path either the phase shifter or the non-tuneable signal line portion.
  • Embodiments comprise a plurality of phase shifters having a plurality of sections, a respective non-tuneable signal line portion associated with each of the phase shifters, and switches configured to switch into the signal path either the respective phase shifter or the associated non-tuneable signal line portion.
  • embodiments provide a combination of a switched-line phase shifter and a phase shifter based on the tuning of material characteristics. Such embodiments permit for a number of advantages such as a compact implementation and low losses, as well as the possibility of a continuous shifting of the signal phase or a digitally controlled phase shift with high resolution.
  • Embodiments provide a wireless communication device comprising a phase shifter as described herein and a phased antenna array, wherein the phase shifter is configured to control the phase shift of a signal sent or received via the phased antenna array.
  • the phase shifter 100 comprises a signal input 102, a signal output 104, a first substrate s1, a second substrate s2, a material 106 having a tuneable characteristic, and a signal line 108 in the form of a strip line.
  • material 106 is e.g. a liquid crystal material.
  • the substrates s1 and s2 are shown separate from each other for sake of explanation. In reality, the substrates are attached to each other so that the signal line 108 is adjacent to the material 106 and so that the total phase shift of a signal transmitted over the signal line 108 can be adjusted by tuning the characteristic of the material 106.
  • Material 106 and signal line 108 are partitioned into a plurality of sections. Each section comprises a signal line portion sl1 to sl11 and an associated material portion mp1 to mp11.
  • the signal line portions sl1 to sl11 form the common signal line 108 between the signal input 102 and the signal output 104. Accordingly, the signal line portions sl1 to sl11 are connected in series between the signal input 102 and the signal output 104.
  • the partitioning is achieved by respective electrodes e1 to e11, each forming means for controlling the tuneable characteristic of the associated material portion mp1 to mp11.
  • the electrodes may be formed on the lower surface of the second substrate s2 or within the second substrate so as to face the material portions mp1 to mp11.
  • the electrodes e1 to e11 may be formed along the extent of the material portions mp1 to mp11. Alternatively, the electrodes e1 to e11 may be provided in an area facing the respective signal line portion sl1 to sl11 only.
  • An electric field applied to each of the material portions mp1 to mp11 is individually controllable by means of the electrodes e1 to e11, such as by applying a corresponding DC voltage between each of the electrodes e1 to e11 and the common signal line 108 or by applying a corresponding DC voltage between each of the electrodes e1 and e11 and a further electrode (not shown) arranged so that the material portions mp1 to mp11 are arranged between the electrodes e1 to e11 and the further electrode.
  • the further electrode may be formed on the top surface of the first substrate s1 or within the first substrate s1.
  • electrodes configured for the application of voltages in order to change an electric field applied to the material portions are provided.
  • electrodes or conductors configured for the application of currents in order to change a magnetic field applied to the material portions may be provided.
  • material portions mp1 to mp11 may be formed by magnetically tunable elements and electrodes e1 to e11 may represent conductors allowing a variable current flow in order to apply a variable magnetic field to the respective material portion.
  • Such conductors may be regarded as representing an element or a magnet configured to apply a variable magnetic field to the corresponding material portion in order to change the permeability thereof.
  • the characteristic of the material of each material portion mp1 to mp11 is tuneable individually to apply an adjustable phase shift to a signal transmitted over the associated signal line portion sl1 to sl11.
  • the total phase shift applied by phase shifter 100 to a signal transmitted from the signal input 102 to the signal output 104 can be adjusted by controlling each section individually.
  • the material portions mp1 to mp11 are portions of a continuous volume of material 106 formed in the second substrate s2 so as to extend up to the upper surface thereof.
  • the material portions mp1 to mp11 may be formed by separate volumes of material.
  • Fig. 1 shows a phase shifter resembling a strip-line phase shifter based on tuning of material characteristics. Yet, instead of having a continuous substrate and applying a single tuning signal along the line, it is a composite of a number of strip-line sections sl1 to sl11, each can be tuned individually. Each section covers a fractional portion of the total line length, i.e., it measures a fractional part of the guide wavelength. This allows switching only between the maximum and the minimum of the refractive index of the tuneable material in each section.
  • the line is therefore composed of little portions showing either a refractive index n min or n max . In total, the line can be considered having an effective refractive index n eff that is given by an average value, with n min ⁇ n eff ⁇ n max .
  • the signal line can be of an arbitrary type, including microstrip lines, tri-plate lines, waveguides, partially filled waveguides, substrate-integrated waveguides among others.
  • the characteristic, i.e. the refractive index, of the material can be varied by varying the permittivity of the material by changing an electric field applied.
  • the tuneable material may comprise a non-linear dielectric, such a non-linear dielectric selected from the group consisting of so-called ferroelectrics, solid mixtures (such as mixtures of Barium, Strontium and Titanate), and so-called liquid crystals.
  • the characteristic, i.e. the refractive index, of the material can be varied by varying the permeability of the material by changing a magnetic field applied.
  • the tuneable material may comprise a ferrite material.
  • the tuneable material can be of any type, provided that the characteristic which changes the phase shift applied to the signal, such as the refractive index, can be varied by any means.
  • phase shifters may comprise at least one controller configured to apply the necessary signals in order to effect the variation of the material characteristics in order to achieve the phase shifts as desired.
  • the phase shifter shown in Fig. 1 may comprise a controller adapted to apply a separate voltage to each of the electrodes e1 to e11.
  • the signal input 102 and the signal output 104 may be connected between a signal generator and a phased array antenna in a wireless communication device so that the radiation characteristic of the phased array antenna can be steered by controlling the phase shift provided by the phase shifter.
  • Fig. 2 shows a phase shifter 200 comprising a plurality of sections. Each section represents a tunable portion and comprises a tunable signal line portion 202, 204, 206. Each signal line portion 202, 204, 206 has associated therewith a material portion having a tuneable characteristic so that the phase shift applied to a signal transmitted over the associated signal line portion 202, 204, 206 can be adjusted. Thus, the electrical length of line portions 202, 204 and 206, which have fixed mechanical lengths, can be adjusted by tuning the characteristic of the material portion. Moreover, each signal line portion 202, 204, 206 has associated therewith a non-tunable signal line portion 212, 214, 216. Switches 220 to 230 are provided.
  • Switches 220 to 230 can be controlled by control signals c1 to c6.
  • the switches 220 to 230 are configured to switch into a signal path between a signal input 232 and a signal output 234 of the phase shifter 200 either the tunable signal line portion 202, 204, 206 or the associated non-tunable signal line portion 212, 212, 214. That is, depending on the control signals applied, switches 220 to 230 are configured to switch the tunable signal line portions 202, 204, 206 in series between the signal input 232 and the signal output 234.
  • the characteristic of the tunable signal line portions may be controlled continuously, in discrete steps or, in preferred embodiments, in a binary manner between two values only.
  • the phase shift provided by each of the non-tuneable signal line portions may be different from the phase shifts which the associated tuneable signal line portions may be tuned to.
  • Fig. 2 shows a phase shifter comprising a combination of a switched-line phase shifter with each section being individually tuneable by variation of material characteristics. This approach allows implementation of a phase shifter composed of a few switched-line sections with a high phase resolution.
  • the total achievable phase shift is composed of two terms: the phase shift corresponding with the difference of the mechanical lengths, i.e., the switched-line portion ⁇ s ,max , and the phase shift corresponding with the difference of the electrical lengths, i.e., the tuneable portion ⁇ t ,max .
  • the number of switched-line sections required follows from the condition ⁇ t, max ⁇ ⁇ /2 N -1 , assuming a maximum total phase shift of 2 ⁇ (or 360 degrees).
  • the tuneable portions of the phase shifter shown in Fig. 2 can be implemented using a continuously tuneable phase shifter.
  • the tunable portions of the phase shifter shown in Fig. 2 can be implemented using a phase shifter as shown in Fig. 1 or Fig. 3 .
  • Such embodiments may be regarded as a phase shifter system comprising at least one phase shifter having a plurality of individually tuneable sections as described herein and a non-tunable signal line portion, wherein the switches 220 to 230 are configured to switch into the signal path between the signal input 232 and the signal output 234 either the phase shifter or the non-tunable signal line portion.
  • the signal line of the tunable line portion can be of an arbitrary type, including microstrip lines, tri-plate lines, waveguides, partially filled waveguides, substrate-integrated waveguides among others.
  • the tuneable material can be of any type, provided that the refractive index can be varied by any means. Again, this includes ferrites, ferroelectrics, ferromagnetics, dielectrics, and LC mixtures.
  • the switches can be of any type, including semiconductor switches (e.g. diodes, transistors), micromechanical switches (MEMS), among others.
  • the line lengths of the tunable line portions may be different from each other.
  • the tunable line portions may have equal lengths.
  • each tunable line portion 202, 204, 206 has associated therewith a non-tunable line portion 212, 214, 216. In other embodiments, only some or only one of the tunable line portions may have associated therewith a non-tunable line portion.
  • Fig. 3 shows an embodiment of a phase shifter 300 similar to the embodiment shown in Fig. 1 , wherein the plurality of sections has different line lengths.
  • signal line 108 is partitioned into a plurality of signal line portions sl12 to sl16 of different length and material 106 is partitioned into a plurality of material portions mp12 to mp16 of different length.
  • the partitioning is achieved by electrodes e12 to e16.
  • aspects of the embodiment shown in Fig. 3 may be identical to aspects of the embodiment shown in Fig. 1 and, therefore, repeated description of such aspects is omitted.
  • Phase shifter 300 shown in Fig. 3 combines aspects of the embodiments shown in Figs. 1 and 2 . It adopts the composite shown Fig. 1 with differently sized portions.
  • partitioning may be done based on a binary scheme, i.e., the first and shortest section sl12 measures a given length, say ⁇ x , the second section sl13 measures a length of 2 ⁇ x , the third sl14 of 4 ⁇ x and so on.
  • Other schemes, including schemes of other bases are also possible.
  • any permutation of the order of the different length sections may be considered.
  • the composite of differently sized portions allows reducing the number of steering signals.
  • Phase shifters according to the invention provide numeral advantages when compared to prior solutions.
  • Embodiments of phase shifters of the invention may be applied in wireless communication devices and systems, for example in satellite communications, especially beam forming and tracking for moving receivers or transmitters, or other communication systems or devices including mobile phones, wireless local area networks, etc., that benefit from improved antenna gain and/or directivity. It is however, clear for those skilled in the art that the invention may find application in any field were adjustable phase shifters are needed.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP14189204.2A 2014-10-16 2014-10-16 Phasenschieber Withdrawn EP3010083A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14189204.2A EP3010083A1 (de) 2014-10-16 2014-10-16 Phasenschieber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14189204.2A EP3010083A1 (de) 2014-10-16 2014-10-16 Phasenschieber

Publications (1)

Publication Number Publication Date
EP3010083A1 true EP3010083A1 (de) 2016-04-20

Family

ID=51703091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14189204.2A Withdrawn EP3010083A1 (de) 2014-10-16 2014-10-16 Phasenschieber

Country Status (1)

Country Link
EP (1) EP3010083A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020248703A1 (zh) * 2019-06-14 2020-12-17 京东方科技集团股份有限公司 移相器、移相度补偿装置、移相度补偿方法

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5237629A (en) * 1992-03-19 1993-08-17 The United States Of America As Represented By The United States Department Of Energy Digitally controlled distributed phase shifter
US5409889A (en) 1993-05-03 1995-04-25 Das; Satyendranath Ferroelectric high Tc superconductor RF phase shifter
US5451567A (en) 1994-03-30 1995-09-19 Das; Satyendranath High power ferroelectric RF phase shifter
DE3635740C1 (de) * 1985-10-23 1998-01-08 Dassault Electronique UHF-Phasenschieber
US5936484A (en) 1995-02-24 1999-08-10 Thomson-Csf UHF phase shifter and application to an array antenna
US20010017577A1 (en) 2000-02-21 2001-08-30 Yasuo Toko Variable phase shifter
US20040041664A1 (en) 2002-01-31 2004-03-04 Hideki Takasu Microwave phase shifter and power amplifier
US20050067605A1 (en) 2003-07-11 2005-03-31 Georg Lussem Components for high-frequency technology
WO2005099086A1 (en) * 2004-03-31 2005-10-20 Xcom Wireless, Inc. Electronically controlled hybrid digital and analog phase shifter
US20050242993A1 (en) * 2004-04-29 2005-11-03 Hein Paul W Non-multiple delay element values for phase shifting
US20090073332A1 (en) * 2004-12-20 2009-03-19 Kyocera Corporation Liquid Crystal Component Module and Method of Controlling Dielectric Constant
US20140022029A1 (en) 2011-11-14 2014-01-23 Anatoliy Volodymyrovych GLUSHCHENKO Nanoparticle-enhanced liquid crystal radio frequency phase shifter

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3635740C1 (de) * 1985-10-23 1998-01-08 Dassault Electronique UHF-Phasenschieber
US5237629A (en) * 1992-03-19 1993-08-17 The United States Of America As Represented By The United States Department Of Energy Digitally controlled distributed phase shifter
US5409889A (en) 1993-05-03 1995-04-25 Das; Satyendranath Ferroelectric high Tc superconductor RF phase shifter
US5451567A (en) 1994-03-30 1995-09-19 Das; Satyendranath High power ferroelectric RF phase shifter
US5936484A (en) 1995-02-24 1999-08-10 Thomson-Csf UHF phase shifter and application to an array antenna
US20010017577A1 (en) 2000-02-21 2001-08-30 Yasuo Toko Variable phase shifter
US20040041664A1 (en) 2002-01-31 2004-03-04 Hideki Takasu Microwave phase shifter and power amplifier
US20050067605A1 (en) 2003-07-11 2005-03-31 Georg Lussem Components for high-frequency technology
WO2005099086A1 (en) * 2004-03-31 2005-10-20 Xcom Wireless, Inc. Electronically controlled hybrid digital and analog phase shifter
US20050242993A1 (en) * 2004-04-29 2005-11-03 Hein Paul W Non-multiple delay element values for phase shifting
US20090073332A1 (en) * 2004-12-20 2009-03-19 Kyocera Corporation Liquid Crystal Component Module and Method of Controlling Dielectric Constant
US20140022029A1 (en) 2011-11-14 2014-01-23 Anatoliy Volodymyrovych GLUSHCHENKO Nanoparticle-enhanced liquid crystal radio frequency phase shifter

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
C. WEIL; G. LUESSEM; R. JACOBY: "Tunable Inverted Tunable Inverted-Microstrip Phase Shifter Device Using Nematic Liquid Crystals", MICROWAVE SYMPOSIUM DIGEST, 2002 IEEE MTT-S INTERNATIONAL, vol. 1, 2 June 2002 (2002-06-02), pages 367 - 371
PARK J ET AL: "Distributed phase shifter with pyrochlore bismuth zinc niobate thin films", IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 16, no. 5, 1 May 2006 (2006-05-01), pages 264 - 266, XP001548908, ISSN: 1531-1309, DOI: 10.1109/LMWC.2006.873528 *
R. V. GARVER: "BroadBand Diode Phase Shifters", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 20, no. 5, May 1972 (1972-05-01), pages 314 - 323
S. K. KOUL; B. BHAT: "Microwave and Millimeter Wave Phase Shifters", 1991, ARTECH HOUSE
S. MULLER ET AL.: "Tunable Passive Phase Shifter for Microwave Application using Highly Anisotropic Liquid Crystals", MICROWAVE SYMPOSIUM DIGEST, 2004 IEEE MTT-S INTERNATIONAL, vol. 2, 6 June 2004 (2004-06-06), XP010728343, DOI: doi:10.1109/MWSYM.2004.1339190

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020248703A1 (zh) * 2019-06-14 2020-12-17 京东方科技集团股份有限公司 移相器、移相度补偿装置、移相度补偿方法
US11387530B2 (en) 2019-06-14 2022-07-12 Boe Technology Group Co., Ltd. Phase shift compensation device for detecting and adjusting an actual dielectric constant in a liquid crystal phase shifter

Similar Documents

Publication Publication Date Title
US10163889B2 (en) Phase shifter
US5032805A (en) RF phase shifter
EP1281210B1 (de) Mikrostreifenleiter-phasenschieber
KR102405672B1 (ko) Dgs를 포함하는 위상 천이기 및 이를 포함하는 전파 통신 모듈
US8988169B2 (en) Radio frequency devices with enhanced ground structure
EP1121725B1 (de) Spannungsgesteuerte varaktoren und abstimmbare geräte mit derartigen varaktoren
CN104852112A (zh) 一种频率和相位可重构的混合耦合器及其设计方法
US10411349B2 (en) Systems and methods for reducing intermodulation for electronically controlled adaptive antenna arrays
Chicherin et al. Analog-type millimeter-wave phase shifters based on MEMS tunable high-impedance surface and dielectric rod waveguide
US7030463B1 (en) Tuneable electromagnetic bandgap structures based on high resistivity silicon substrates
US20080315977A1 (en) Low loss RF transmission lines
Strunck et al. Continuously tunable phase shifters for phased arrays based on liquid crystal technology
Jakoby et al. Nonlinear dielectrics for tunable microwave components
CN110235301B (zh) 基于液晶的高频装置和高频开关
Strunck et al. Reliability study of a tunable Ka-band SIW-phase shifter based on liquid crystal in LTCC-technology
US20020070900A1 (en) Phase shifter and associated method for impedance matching
EP3010083A1 (de) Phasenschieber
US10535923B2 (en) Systems and methods for reducing intermodulation for electronically controlled adaptive antenna arrays
EP2697861B1 (de) Breitbandiger mikrowellen-hybridkoppler mit beliebiger phasenverschiebung und geteilter leistung
KR102594501B1 (ko) 가변유전층을 포함하는 위상배열 안테나
EP3577712B1 (de) Hochfrequenzvorrichtung auf flüssigkristallbasis und hochfrequenzschalter
Mabrouki et al. A 4 bits Reflection type phase shifter based on Ga As FET
US20050012564A1 (en) Co-planar constant-attenuation phase modifier
Nyzovets et al. A mm-wave beam-steerable leaky-wave antenna with ferroelectric substructure
US4270104A (en) Phase equalizer in microwave transmission line

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20161021