Novel High Precision Phase Shifters for Active Electronically Scanned Arrays PDF Download

Author: Giuseppe Coviello
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author:
Publisher:
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Category :
Languages : en
Pages :

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The paper describes the design and measurement results of a monolithic single chip phase shifter. This broadband, 6-bit phase shifter exhibits very low overall insertion loss with remarkably low variation, good VSWR and exceptional phase performance with only 2.4 degrees RMS phase error over all 64 phase states across the entire 5-6 GHz band. Moreover the digital design leads to good stability with regard to temperature and voltage variation. These excellent performance data lead to minimum driver levels and high efficiency in Tx-mode, a distinct reduction of the noise figure in Rx-mode for the complete T/R-module and allow minimum calibration effort of the active phased array.

Author: Randy L. Haupt
Publisher: John Wiley & Sons
ISBN: 1118860144
Category : Technology & Engineering
Languages : en
Pages : 228

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Book Description
Introduces timed arrays and design approaches to meet the new high performance standards The author concentrates on any aspect of an antenna array that must be viewed from a time perspective. The first chapters briefly introduce antenna arrays and explain the difference between phased and timed arrays. Since timed arrays are designed for realistic time-varying signals and scenarios, the book also reviews wideband signals, baseband and passband RF signals, polarization and signal bandwidth. Other topics covered include time domain, mutual coupling, wideband elements, and dispersion. The author also presents a number of analog and digital beamforming networks for creating and manipulating beams. The book concludes with an overview of the methods to integrate time delay into the array design and of several other adaptive arrays that prove useful in many different systems. Examines RF signal concepts such as polarization and signal bandwidth and their applications to timed antenna arrays Covers arrays of point source, elements in timed antenna arrays, active electronically scanned array technology, and time delay in corporate fed arrays Includes complete design examples for placing time delay in arrays Timed Arrays: Wideband and Time Varying Antenna Arrays is written for practicing engineers and scientists in wireless communication, radar, and remote sensing as well as graduate students and professors interested in advanced antenna topics.

Author: Sunghwan Kim
Publisher:
ISBN: 9781109717693
Category :
Languages : en
Pages : 218

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Book Description
One of the challenges in implementing phased array systems is to implement high performance phase shifters. This dissertation presents highly linear phase shifters for 2GHz wireless mobile applications and millimeter-wave phased array transmitters with active phase shifters. Different architectures of phased array systems pursue different aspects of phase shifters. In the first part of the dissertation, a low-loss, low-distortion passive variable phase shifter on Silicon-on-Glass (SOG) process will be presented. Schottky diodes in the SOG process enables very high quality factor of varactor diodes and on-chip passive inductors. A novel passive variable phase shifter with varactors and inductors presented in the dissertation has very low third-order intermodulation distortion (IMD3) and low insertion loss, which make it suitable for transmitter front-end applications in mobile devices working at CDMA bands. In the second part, two generations of integrated phased array upconverters at millimeter-wave frequencies with LO-path phase shifting will be presented. The phase-shifting is achieved by the vector summation of the I/Q LO signals in the LO path. The first version adopts a frequency doubler followed by a polyphase filter to generate the I/Q basis LO signals. The principal of the active phase shifter operation and frequency doubler are explained. The phase error due to amplitude and phase mismatch of the polyphase filter is discussed. The eight-element phased-array transmitter is implemented in a 0.18[mu] SiGe BiCMOS process in the later version. To reduce dc power consumption, a localized frequency doubling injection-locked quadrature oscillator is used to ease LO signal distribution. Measured conversion gain over frequency and IF signal is presented. Array beam scanning pattern is also presented based on the measured phase and power for each channel.

Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781719372336
Category :
Languages : en
Pages : 30

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While there are a myriad of applications for microwave phase shifters in instrumentation and metrology, power combining, amplifier linearization, and so on, the most prevalent use is in scanning phased-array antennas. And while this market continues to be dominated by military radar and tracking platforms, many commercial applications have emerged in the past decade or so. These new and potential applications span low-Earth-orbit (LEO) communications satellite constellations and collision warning radar, an aspect of the Intelligent Vehicle Highway System or Automated Highway System. In any case, the phase shifters represent a considerable portion of the overall antenna cost, with some estimates approaching 40 percent for receive arrays. Ferrite phase shifters continue to be the workhorse in military-phased arrays, and while there have been advances in thin film ferrite devices, the review of this device technology in the previous edition of this book is still highly relevant. This chapter will focus on three types of phase shifters that have matured in the past decade: GaAs MESFET monolithic microwave integrated circuit (MMIC), micro-electromechanical systems (MEMS), and thin film ferroelectric-based devices. A brief review of some novel devices including thin film ferrite phase shifters and superconducting switches for phase shifter applications will be provided. Finally, the effects of modulo 2 phase shift limitations, phase errors, and transient response on bit error rate degradation will be considered. Romanofsky, Robert R. Glenn Research Center ANTENNA ARRAYS; PHASE SHIFT CIRCUITS; MICROWAVE CIRCUITS; PHASE SHIFT; INTEGRATED CIRCUITS; MICROELECTROMECHANICAL SYSTEMS; FIELD EFFECT TRANSISTORS; SUPERCONDUCTIVITY; COMMUNICATION SATELLITES; LINEARIZATION; METROLOGY; TRANSIENT RESPONSE

Author: Guan Leng Tan
Publisher:
ISBN:
Category :
Languages : en
Pages : 402

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Author: Robert R. Romanofsky
Publisher: BiblioGov
ISBN: 9781289224486
Category :
Languages : en
Pages : 36

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Book Description
While there are a myriad of applications for microwave phase shifters in instrumentation and metrology, power combining, amplifier linearization, and so on, the most prevalent use is in scanning phased-array antennas. And while this market continues to be dominated by military radar and tracking platforms, many commercial applications have emerged in the past decade or so. These new and potential applications span low-Earth-orbit (LEO) communications satellite constellations and collision warning radar, an aspect of the Intelligent Vehicle Highway System or Automated Highway System. In any case, the phase shifters represent a considerable portion of the overall antenna cost, with some estimates approaching 40 percent for receive arrays. Ferrite phase shifters continue to be the workhorse in military-phased arrays, and while there have been advances in thin film ferrite devices, the review of this device technology in the previous edition of this book is still highly relevant. This chapter will focus on three types of phase shifters that have matured in the past decade: GaAs MESFET monolithic microwave integrated circuit (MMIC), micro-electromechanical systems (MEMS), and thin film ferroelectric-based devices. A brief review of some novel devices including thin film ferrite phase shifters and superconducting switches for phase shifter applications will be provided. Finally, the effects of modulo 2 phase shift limitations, phase errors, and transient response on bit error rate degradation will be considered.

Author: J. R. Forrest
Publisher:
ISBN:
Category :
Languages : en
Pages : 42

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Book Description
The report describes techniques for the continuous monitoring and control of phase and output power in active phased array modules. The output phase and power of the signal from the module are sensed by a simple six-port network using Schottky barrier detectors; the output voltage from these detectors is used in a control loop to provide correction signals to a phase shifter and attenuator. Two control schemes have been compared. One is a digital loop using a microprocessor and this achieves an overall control accuracy of 0.1dB and 1 deg, but has the disadvantage of complexity and of a response time in the order of hundreds of milliseconds. The second is completely analogue loop which has a response time of less than 100ns and can provide real-time phase correction during the output pulse from a module. Although the control accuracy is marginally worse with the analogue loop in these initial tests, it is expected that refinements in the continuation of this work will enable the same accuracy to be achieved in both digital and analogue loop techniques. The application of these techniques may be particularly important in future monolithic integrated circuit radar module design. (Author).

Author: Randy L. Haupt
Publisher: John Wiley & Sons
ISBN: 1119072093
Category : Technology & Engineering
Languages : en
Pages : 224

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Book Description
Introduces timed arrays and design approaches to meet the newhigh performance standards The author concentrates on any aspect of an antenna array thatmust be viewed from a time perspective. The first chapters brieflyintroduce antenna arrays and explain the difference between phasedand timed arrays. Since timed arrays are designed for realistictime-varying signals and scenarios, the book also reviews widebandsignals, baseband and passband RF signals, polarization and signalbandwidth. Other topics covered include time domain, mutualcoupling, wideband elements, and dispersion. The author alsopresents a number of analog and digital beamforming networks forcreating and manipulating beams. The book concludes with anoverview of the methods to integrate time delay into the arraydesign and of several other adaptive arrays that prove useful inmany different systems. Examines RF signal concepts such as polarization and signalbandwidth and their applications to timed antenna arrays Covers arrays of point source, elements in timed antennaarrays, active electronically scanned array technology, and timedelay in corporate fed arrays Includes complete design examples for placing time delay inarrays Timed Arrays: Wideband and Time Varying Antenna Arrays iswritten for practicing engineers and scientists in wirelesscommunication, radar, and remote sensing as well as graduatestudents and professors interested in advanced antenna topics.

Author: Robert J. Mailloux
Publisher: Artech House Publishers
ISBN: 9781580536899
Category : Technology & Engineering
Languages : en
Pages : 496

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Book Description
"This thoroughly revised edition of the Artech House classic, Phased Array Antenna Handbook, offers the most up-to-date and broadest view of array antennas and systems. Supported with over 350 equations and more than 270 illustrations, the book offers complete design details that allow practitioners to size an array system with speed and confidence."--BOOK JACKET.Title Summary field provided by Blackwell North America, Inc. All Rights Reserved