WO2014035274A1 - Filtre rf radial d'harmoniques impairs - Google Patents

Filtre rf radial d'harmoniques impairs Download PDF

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Publication number
WO2014035274A1
WO2014035274A1 PCT/RU2012/000702 RU2012000702W WO2014035274A1 WO 2014035274 A1 WO2014035274 A1 WO 2014035274A1 RU 2012000702 W RU2012000702 W RU 2012000702W WO 2014035274 A1 WO2014035274 A1 WO 2014035274A1
Authority
WO
WIPO (PCT)
Prior art keywords
radial
filter
power
segment
segments
Prior art date
Application number
PCT/RU2012/000702
Other languages
English (en)
Inventor
Oliver Heid
Timothy Hughes
Stepan Alexanrovich POLIKHOV
Alexander Yourievich SMIRNOV
Original Assignee
Siemens, Research Center Limited Liability Company
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 Siemens, Research Center Limited Liability Company filed Critical Siemens, Research Center Limited Liability Company
Priority to PCT/RU2012/000702 priority Critical patent/WO2014035274A1/fr
Priority to US14/423,206 priority patent/US9735457B2/en
Priority to RU2015110996A priority patent/RU2615049C2/ru
Priority to CN201380049887.7A priority patent/CN104662733B/zh
Priority to EP13730074.5A priority patent/EP2878036A1/fr
Priority to JP2015529746A priority patent/JP6030765B2/ja
Priority to PCT/RU2013/000128 priority patent/WO2014035286A1/fr
Publication of WO2014035274A1 publication Critical patent/WO2014035274A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/423—Amplifier output adaptation especially for transmission line coupling purposes, e.g. impedance adaptation

Definitions

  • the present invention relates to higher-order harmonic filter design, particularly, to an odd harmonic radial RF filter.
  • the higher-order harmonic filters are needed for creation of class-F RF power amplifiers. These filters are required both to increase the efficiency of the amplifiers by reflecting the power carried by odd harmonics and to combine the power from several amplifiers (RF modules) and deliver it the load.
  • the demand for such device is especially high for designing compact high-efficient RF generators/amplifiers.
  • US 4,238,747 discloses a mode filter apparatus for preventing unwanted modes in a multi-moded structure utilizing a radial plurality of resonant slots on the bottom of the filter cavity.
  • the top of the filter cavity includes a variable height center section to provide mode selectivity in cooperation with the resonant slots.
  • the cylindrical resonant cavity has a radial pattern of resonant slots in the bottom plate and a variable height center portion in the top plate of the apparatus.
  • the mode selectivity of the mode filter apparatus may be controlled by varying the height of the center portion of the top plate, as well as by changing the length, width and depth of the radial slots.
  • the mode selectivity may also be varied by filling the radial slots with absorbing material to various depths.
  • radial power combiner/divider radial slots are provided for suppression of undesired modes, certain undesired modes which are not adequately suppressed by the radial slots are allowed to be propagated in a central coaxial transmission line and suppressed therein by means of longitudinal slots in the outer conductor.
  • the central transmission line of the combiner/divider is in the form of a circular waveguide, and the suppression means comprises thin, spaced coaxial cylinders of dissipative material.
  • a cavity resonator coupling-type power distributor/power combiner which can distribute or combine microwave electric power over a wide bandwidth with a small insertion loss.
  • a cavity resonator coupling-type power distributor/power combiner includes a first cavity resonator operatively resonating with a cylindrical ⁇ , ⁇ , ⁇ mode, and a plurality of second cavity resonators arranged on the periphery of the first cavity resonator and extending radially and symmetrically with respect to the first cavity resonator.
  • the second cavity resonators each have the same shape and size so that magnetic-field coupling is established between the first cavity resonator and each of the second cavity resonators, for distributing or combining microwave power in a microwave amplifier.
  • the higher harmonics are suppressed with radial slits in conductors of the radial line and longitudinal slits in the outer conductor of the output coaxial line; all slits are filled with absorbing dissipative material.
  • US 6,242,984 relates to solid state power amplifier (SSPA) modules that splits a signal into multiple parts, uses distributed amplifiers to amplify the parts, and recombines the amplified parts into a single output.
  • SSPA solid state power amplifier
  • An SSPA module in accordance with the present invention comprises a signal input, and a radial splitter connected to the signal input comprising a plurality of radially extending splitter waveguides.
  • the SSPA module also includes a signal output, and a radial combiner connected to the signal output comprising a plurality of radially extending combiner waveguides. Connections between the splitter and combiner are provided by a plurality of vertically extending waveguides.
  • the SSPA module also includes a plurality of processing circuits for example MM1C amplifiers, connected to the combiner waveguides.
  • a waveguide to microstrip transition may also be used to connect signals propagating in the waveguides to and from microstrip lines connected to the processing circuitry.
  • the transition includes a waveguide section with a top conducting layer that defines a first slit and a second slit bounding a transition area abutting a microstrip section to form a waveguide to microstrip transition.
  • filters are required both to increase the efficiency of the amplifiers, by reflecting the power carried by odd harmonics and to combine the power from several amplifiers (RF modules) and deliver it the load.
  • the object of the present invention is to provide an odd harmonic radial RF filter that serve the problem of increasing the efficiency of the amplifiers by reflecting the power carried by odd harmonics and to combine the power from several amplifiers (RF modules) and deliver it the load.
  • an odd harmonic radial RF filter comprises a plurality filter radial segments connected in series
  • three segments are based on radial transmission lines with constant line impedances, wherein the line impedance value of each segment is defined by the value of opening angle seen at its longitudinal section;
  • one segment is based on a plurality of horn antennae with constant line impedances, which are defined by antenna profile.
  • the radial filter further comprises outer shield, representing shunt inductance, high enough for avoidance of useful power leakage.
  • Fig. l depicts a redial filter (longitudinal section), according to the invention
  • Fig.2 depicts a perspective view of the radial filter (outer shield and load are not shown), according to the invention.
  • the device according to the invention disclosure unites the features of power combiner and 3 rd harmonic filter. It compensates the reactance of the output impedance of plurality of RF modules at fundamental frequency (allowing power delivery from the RF modules to the load) and transforms the load impedance into high real value at the 3rd harmonic (three times the fundamental frequency), which leads to reflection of the 3rd harmonic power back to each RF module output with a zero phase shift.
  • Such reflection serves both for reducing unwanted harmonics from output signal and recharging parasitic capacitance of transistors in RF modules. This allows reaching class-F operation with high theoretical efficiency (>85%).
  • the radial filter consists of four segments connected in series with different line impedances:
  • a plurality filter radial segments are based on radial transmission lines with constant line impedances, wherein the line impedance value of each filter radial segment is defined by the value of opening angle seen at its longitudinal section;
  • one filter radial segment is based on a plurality of horn antennae with constant line impedances, which are defined by antenna profile.
  • Three radial filter segments 2 serves to a number of RF modules connected in parallel to horn antennae 1 , combining their power simultaneously and delivering it to the load, i.e. coaxial cable 3 in this case.
  • One filter radial segment 6 is based on a plurality of filter radial segments (horn antennae) with constant line impedances, which are defined by antenna profile.
  • the outer shield 4 represent shunt inductance, which is high enough for avoidance of useful power leakage.
  • Output slit 5 is shown in fig. 2.

Abstract

La présente invention porte sur un filtre radial, qui comprend une pluralité de segments radiaux de filtre connectés en série, dans lequel trois segments sont basés sur des lignes de transmission radiales présentant des impédances de ligne constantes, la valeur d'impédance de ligne de chaque segment étant définie par la valeur d'angle d'ouverture vu au niveau de sa section longitudinale; un segment étant basé sur une pluralité de segments radiaux de filtre (antenne à cornet) présentant des impédances de ligne constantes, qui sont définies par un profil d'antenne.
PCT/RU2012/000702 2012-08-27 2012-08-27 Filtre rf radial d'harmoniques impairs WO2014035274A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
PCT/RU2012/000702 WO2014035274A1 (fr) 2012-08-27 2012-08-27 Filtre rf radial d'harmoniques impairs
US14/423,206 US9735457B2 (en) 2012-08-27 2013-02-18 RF power combiner functioning as higher-order harmonics filter
RU2015110996A RU2615049C2 (ru) 2012-08-27 2013-02-18 Радиочастотный сумматор мощности, функционирующий как фильтр высших гармоник
CN201380049887.7A CN104662733B (zh) 2012-08-27 2013-02-18 充当高阶谐波滤波器的rf功率合成器
EP13730074.5A EP2878036A1 (fr) 2012-08-27 2013-02-18 Mélangeur de puissance rf fonctionnant en tant que filtre d'harmoniques d'ordre supérieur
JP2015529746A JP6030765B2 (ja) 2012-08-27 2013-02-18 高次高調波フィルタとして機能するｒｆ電力結合器
PCT/RU2013/000128 WO2014035286A1 (fr) 2012-08-27 2013-02-18 Mélangeur de puissance rf fonctionnant en tant que filtre d'harmoniques d'ordre supérieur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU2012/000702 WO2014035274A1 (fr) 2012-08-27 2012-08-27 Filtre rf radial d'harmoniques impairs

Publications (1)

Publication Number Publication Date
WO2014035274A1 true WO2014035274A1 (fr) 2014-03-06

Family

ID=47997752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2012/000702 WO2014035274A1 (fr) 2012-08-27 2012-08-27 Filtre rf radial d'harmoniques impairs

Country Status (1)

Country Link
WO (1) WO2014035274A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104795618A (zh) * 2015-04-27 2015-07-22 通号（郑州）轨道交通科技有限公司 一种具有电磁兼容性的漏感耦合器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238747A (en) 1979-08-10 1980-12-09 The United States Of America As Represented By The Secretary Of The Air Force Mode filter apparatus
US4562409A (en) 1983-03-29 1985-12-31 Fujitsu Limited Cavity resonator coupling-type power distributor/power combiner
US4926145A (en) 1988-12-16 1990-05-15 Flam & Russell, Inc. Radial power combiner/divider with mode suppression
US6242984B1 (en) 1998-05-18 2001-06-05 Trw Inc. Monolithic 3D radial power combiner and splitter
US7385462B1 (en) * 2005-03-18 2008-06-10 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Wideband radial power combiner/divider fed by a mode transducer
US20090303147A1 (en) * 2008-06-09 2009-12-10 Intel Corporation Sectorized, millimeter-wave antenna arrays with optimizable beam coverage for wireless network applications
US20120200458A1 (en) * 2011-02-09 2012-08-09 Qualcomm Incorporated Ground station antenna array for air to ground communication system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238747A (en) 1979-08-10 1980-12-09 The United States Of America As Represented By The Secretary Of The Air Force Mode filter apparatus
US4562409A (en) 1983-03-29 1985-12-31 Fujitsu Limited Cavity resonator coupling-type power distributor/power combiner
US4926145A (en) 1988-12-16 1990-05-15 Flam & Russell, Inc. Radial power combiner/divider with mode suppression
US6242984B1 (en) 1998-05-18 2001-06-05 Trw Inc. Monolithic 3D radial power combiner and splitter
US7385462B1 (en) * 2005-03-18 2008-06-10 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Wideband radial power combiner/divider fed by a mode transducer
US20090303147A1 (en) * 2008-06-09 2009-12-10 Intel Corporation Sectorized, millimeter-wave antenna arrays with optimizable beam coverage for wireless network applications
US20120200458A1 (en) * 2011-02-09 2012-08-09 Qualcomm Incorporated Ground station antenna array for air to ground communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104795618A (zh) * 2015-04-27 2015-07-22 通号（郑州）轨道交通科技有限公司 一种具有电磁兼容性的漏感耦合器
CN104795618B (zh) * 2015-04-27 2017-09-22 通号（郑州）轨道交通科技有限公司 一种具有电磁兼容性的漏感耦合器

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