X-band Phase Shifters for Phased Array PDF Download

Author: Jian Xu
Publisher:
ISBN:
Category :
Languages : en
Pages : 79

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Book Description
In this thesis, X-band phase shifters have been investigated and developed to meet the needs of future multi-antenna communication systems. Different types of digital phase shifters have been described with design equations. An X-band analog phase shifter using vector sum method is designed and simulated in ADS environment. A new biphase modulator using Lange coupler structure is developed and employed in the analog phase shifter. The simulation results show around 12dB insertion loss and around 10dB reflection coefficient. The phase error for each state is better than some of the commercially available products. As an application of the phase shifter, a phased array receiver is proposed on a print circuit board. The receiver is to instantaneously configure the phased array to the direction to which the signal comes from. The integration of antenna array, RF circuit, analog-to-digital converter, and microprocessor gives the receiver practical application in wireless communication area.

Author: Prasanna V. Seshadri
Publisher:
ISBN:
Category :
Languages : en
Pages : 87

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Book Description
With MIMO (Multi-Input Multi-Output) based communication technologies advancing since thebeginning of this decade like WiMax and LTE, phased arrays using multi antennas, have becomea hot topic of research. Such phased arrays are composed of phase shifters which enable thebeam to be steered in the direction of maximum energy. This thesis focuses on the design of sucha phase shifter to work in the X band frequencies of the electromagnetic spectrum. The main useof X band has been in the field of Radar, terrestrial communications as well as forcommunications in space. An Analog phase shifter, based upon I/Q Vector Modulation is first designed using idealcomponents in Agilent ADS. The ideal components which provide a perfect response for thephase shifter are replaced using practical components which affect the output of the phaseshifter. The final design gives an insertion loss in the order of 8 dB and also an error in phasethat is around +/-5 degrees. A possible application for the phase shifter that is designed namely in a receiver with phasedarray antennas is also discussed. This super-heterodyne receiver as a complete system can beintegrated together with the phased array and using a suitable algorithm can focus the main lobeof the phased array antenna in the direction that is desired. Once the system is integrated, it canbe put to practical usage.

Author: Donald C. Benson
Publisher:
ISBN:
Category : Microwave filters
Languages : en
Pages : 139

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Book Description
A novel technique for effecting phase shift of X-band signals has been developed and analyzed for use with quadrature amplitude modulation (QAM) of signals in a phased array application, and the impact of this phase shifter on error vector magnitude (EVM) has been quantified. A commercially available filter consisting of yttrium iron garnet (YIG) spheres was characterized by means of a network analyzer. The gain and phase response was measured across a 25 MHz frequency band centered at 10 GHz, while the filter was tuned in frequency steps such that a 360° range of phase shifts was achieved. The S-parameters from these measurements were integrated with Matlab representations of QAM-16 modulation, demodulation, and phased array antennas to model a complete radio system. The EVM caused by non-ideal gain and phase response of the YIG filter was determined for various beam angles and data patterns. It was found that a YIG filter does provide stable phase shift suitable for phased array applications, with acceptable attenuation so long as the frequency being transmitted remains within the filter's pass band. The particular filter analyzed did not contain sufficient stages to maintain 3 dB flatness across the required 360° tuning range, but performed satisfactorily for a limited range of beam orientation. The capability to provide continuously variable phase shift offered by the YIG filter was found to not offer significant advantage over the discrete steps produced by switched delay lines.

Author: Charles Buntschuh
Publisher:
ISBN:
Category :
Languages : en
Pages : 67

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Book Description
The significance of this research and development effort to the Air Force is the evaluation of diode phase shifters with associated radiating element, driver and memory electronics as they are designed for steering an airborne phased array antenna. The complete network was designed and tested as it might be deployed with a slide-in honeycomb antenna assembly. Results are described for two basic circuit approaches using alumina and teflon glass stripline circuit media. Superior performance and manufacturing ability was experienced with the teflon-glass circuit. Further advantage could be gained by (1) designing a reduced weight device (below 1 ounce) to better approach the goal of a useful antenna element and, (2) develop suitable diode passivation means so that complete hermetic sealing of the circuit is unnecessary, and (3) reduct the average insertion loss (to below 1.5 dB) to minimize the reduction of antenna range resulting with the diode phaser steering technique. (Author).

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

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Book Description
A key element in a GaAs MMIC Transmit/Receive module for active Phased-array application is the phase-shifter needed for the electronic beam steering; because of the circuit complexity and usually large chip size the technological and electrical yield must be maximized. In the present work the design, realisation and performance of an X-band, four-bit phase shifter, using a high-yield technology and a tolerant electric circuit are described.

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: Binboga Siddik Yarman
Publisher: CRC Press
ISBN: 1000794253
Category : Medical
Languages : en
Pages : 653

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Book Description
This book aims to cover a new emerging need in designing digital phase shifter for modern communication systems. With the advancement of new generation mobile communication systems, directed beams of antenna arrays save a substantial amount of power as well as improve the communication quality. In this regard, beam-forming circuits, such as digital phase shifters (DPS) constitute essential parts of the antenna array systems. Therefore, this book is devoted to the design of digital phase shifters for various communications systems. Nowadays, phase array systems demand compact phase shifters suitable for chip implementation with wide phase-range and broad frequency band. Each chapter of this book is organized as stand-alone in such a way that the reader requires no specific background acquired from the other chapters. For each phase shifter topology introduced in this book, the reader is furnished with explicit design equations to construct the circuit under consideration. Furthermore, design equations are programmed using MATLAB to assess the electrical performance of the phase shifters with ideal and lossy components. MATLAB design programs are given at the and of each chapter as appendices and provided as soft copy on the web page of the book. In chapters 12 and 14, MMIC layouts for the lattice and T-section based DPS are provided for the readers. It is hoped that an interested reader can immediately identifies the “optimum phase shifter topology” for the need under consideration with its estimated electric performance.

Author: Héctor J. de los Santos
Publisher: Artech House
ISBN: 9781580535571
Category : Computers
Languages : en
Pages : 298

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Book Description
This is the first comprehensive book to address the design of RF MEMS-based circuits for use in high performance wireless systems. A groundbreaking research and reference tool, the book enables you to understand the realm of applications of RF MEMS technology; become knowledgeable of the wide variety and performance levels of RF MEMS devices; and partition the architecture of wireless systems to achieve greater levels of performance. This innovative resource also guides you through the design process of RF MEMS-based circuits, and establishes a practical knowledge base for the design of high-yield RF MEMS-based circuits. The book features exercises and detailed case studies on working RF MEMS circuits that help you decide what approaches best fit your design constraints. This unified treatment of RF MEMS-based circuit technology opens up a new world of solutions for meeting the unique challenges of low power/portable wireless products.

Author: Gabriel M. Rebeiz
Publisher: John Wiley & Sons
ISBN: 0471462888
Category : Technology & Engineering
Languages : en
Pages : 512

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Book Description
Ultrasmall Radio Frequency and Micro-wave Microelectromechanical systems (RF MEMs), such as switches, varactors, and phase shifters, exhibit nearly zero power consumption or loss. For this reason, they are being developed intensively by corporations worldwide for use in telecommunications equipment. This book acquaints readers with the basics of RF MEMs and describes how to design practical circuits and devices with them. The author, an acknowledged expert in the field, presents a range of real-world applications and shares many valuable tricks of the trade.

Author: M. Simpson
Publisher:
ISBN:
Category :
Languages : en
Pages : 39

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Book Description
Efforts were continued on a program to develop waveguide reciprocal latching ferrite phase shifters for the X-band and C-band frequency ranges. The phase shifters are to operate in a digital manner and will contain four bits, namely 180, 90, 45 and 22.5 degrees. Another objective of this program is the design of a highly efficient and stable electronic driver circuit. This circuit is to provide switching of all four bits with an overall efficiency of at least 70%. The phase shifters are to be capable of use in phased array antenna systems. Experimental data of reciprocal phase shift, transmission loss, and impedance match produced by a single bit dielectric loaded double window ferrite toroid situated in the H-plane of ridge and rectangular waveguides at X-band frequencies are presented. Reciprocal phase shift of approximately 90 degrees per inch with transmission loss of about 1.0 db and a variation of phase shift of + or - 15 degrees over the frequency range of 9.0 to 9.7 Gc, has been obtained from the ridge waveguide phase shifter configuration. Experimental data of somewhat lower quality has been produced by the rectangular waveguide phase shifter configuration. (Author).