Design of broadband vector sum phase shifters and a phased array demonstrator

... types of phased arrays: passive and active phased arrays In passive phased arrays, antenna elements have a central transmitter/receiver (T/R) and a power distribution network There is generally ... diagram of phased array demonstrator and the 360º VSPS .48 Figure 5-3: Photo of the phased array demonstrator .49 Figure 5-4: Photo of the DAC AD5390 control of analog voltages for beam ... analysis of broadband phase shifters like the vector- sum phase shifter which allows high phase resolution with low RMS phase errors Such broadband vector- sum phase shifters are then designed and improved...

Vector sum phase shifter using a quadrature magic t for application in polarization control

... substrate in the coupled line area of the quadrature Magic- T A thinner substrate will result in a width of the coupled line in the magic- T being too thin to be fabricated; a thicker substrate ... between the two outputs The key component in part A is the novel Quadrature Magic- T The unique feature of this Quadrature Magic- T is its capability to perform vector 18 summation at the two output ... lists the main polarizations and their mathematical and graphic vector representation Table 1-1: Main polarizations Polarization Normalized Jone vector Horizontal ( ) Vertical ( ) Slant 45° -Slant...

QUASILINEAR CONTROL: Performance Analysis and Design of Feedback Systems with Nonlinear Sensors and Actuators pot

... the subtitle Performance Analysis and Design of Feedback Systems with Nonlinear Actuators and Sensors In view of the above, one may ask a question: If all feedback systems include nonlinear instrumentation, ... Quasilinear Control Performance Analysis and Design of Feedback Systems with Nonlinear Sensors and Actuators ShiNung Ching Massachusetts Institute of Technology Yongsoon ... linearization of the closed loop system of Figure 2.4 First, we address the case of nonlinear actuators and sensors separately and then the case of nonlinearities in both actuators and sensors simultaneously...

Báo cáo hóa học: " Optimal Design of Noisy Transmultiplexer Systems Huan Zhou1 and Lihua Xie2" docx

... International Journal of Control, Automation and Systems, and Journal of Control Theory and Applications He is also a Member of the Editorial Board of IEE Proceedings on Control Theory and Applications ... and noise ﬁltering design in transmultiplexer systems, ” Signal Processing, vol 43, no 1, pp 65–78, 1995 [16] Y.-M Cheng, B.-S Chen, and L.-M Chen, “Minimax deconvolution design of multirate systems ... is the z-transform of si (k) and Sc,i (z) is due to the inputs of other bands and is termed as crosstalk in the ith band In general, the crosstalk in the ith band is composed of (M − 1) leakages...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 2 potx

... point O2 on line B[B2 extended Bisect line segment B [B2 , and draw a circle of that radius about 02 Label the two intersections of the circle and B[B2 extended, A[ and A2 Measure the length of the ... seen that the designer will have little direct control over the location of the fixed pivots since they are one of the results of the synthesis process It is common for the designer to have some ... defined as the angle between the output link and the coupler * It is usually taken as the absolute value of the acute angle of the pair of angles at the intersection of the two links and varies...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 3 pot

... are then solved to find links and 3, and the appropriate vector components are added together to get the locations of fixed pivots Oz and 04 The link lengths are returned to the main part of program ... by the angles of the position vectors Zl and Zz The angle corresponds to the Equations 5 .31 can be solved using the approach of equations 5.27 and 5.18, by changing W to U and Z to S and ... with the values from equation 5.25 inserted to get the coordinates of vectors W and Z, and a second time with values from equation 5 .31 in the matrix to get the coordinates of vectors U and S...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 4 pptx

... example link is the driver, and 8z and OOz are given for the "freeze frame" position shown We wish to solve for 0 04, the angular velocity of link 4, and also for the velocity of slip at the joint labeled ... 6-18 the axis of slip is shown to be tangent to the slider motion and is the line along which all sliding occurs between links and The axis of transmission is defined to be perpendicular to the ... P referenced to the origin of the global coordinate system The right side defines it as the sum of the absolute acceleration of some other reference point A in the same system and the acceleration...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 5 pps

... the direction of motion (velocity) of the follower and the direction of the axis oftransmission.* When = 0, all the transmitted force goes into motion of the follower and none into slip velocity ... defined as the smallest circle which can be drawn tangent to the locus of the centerline of the follower as shown in Figure 8-39 The locus of the centerline of the follower is called the pitch ... matched exactly to the conveyor, in order to carry the tools alongside for a long enough time to their job These cam driven "chaser" mechanisms must then return the tool quickly to its start position...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 6 potx

... stage of the design to accurately determine the best sizes and shapes of the parts We must estimate the masses of the links and other parts of the design in order to make a first pass at the calculation ... golf club In the case of our mallet example, a center of percussion at the head corresponds to a center of rotation near the end of the handle, and the handle is usually contoured to encourage ... spot on the bat The "right place on the bat" to hit the ball is the center of percussion associated with the point that your hands grip the bat (the center of rotation) Hitting the ball at other...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 7 potx

... by the driver (motor) and stored temporarily in the moving links, and the negative pulses of torque as energy attempting to return from the links to the driver Unfortunately most motors are designed ... than the peak torque We would like to provide some means to smooth out these oscillations in torque during the cycle This will allow us to size the motor to deliver the average torque rather ... out of the system needs to be absorbed by the flywheel and then returned to the system during each cycle to smooth the variations in shaft speed the torque curve (see Table 11-1, p 552) and the...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 8 ppsx

... allow us to size the motor to deliver the average torque rather than the peak torque One convenient and relatively inexpensive means to this end is the addition of a flywheel to the system TORQUE ... by the driver (motor) and stored temporarily in the moving links, and the negative pulses of torque as energy attempting to return from the links to the driver Unfortunately most motors are designed ... out of the system needs to be absorbed by the flywheel and then returned to the system during each cycle to smooth the variations in shaft speed the torque curve (see Table 11-1, p 552) and the...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 9 docx

... program These are noted in the text The student is encouraged to investigate these examples with program ENGINE in order to develop an understanding of and insight to the subtleties of this topic ... one to the other, in order to stagger the motions of the pistons in time It should be apparent from the discussion of shaking forces and balancing in the previous chapter that we would like to ... our intention to make an "engine designer" of the student so much as to apply dynamic principles to a realistic design problem of general interest and also to convey the complexity and fascination...

DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 10 docx

... diligently attempts to interpret the program's results and relate them to the relevant theory, a more thorough understanding of the kinematics and dynamics can result On the other hand, there is a great ... well as the magnitude and angle of the vector are displayed The programs also allow alternate presentations of polar plots, showing just the vectors, just the envelope of the path of the vector tips, ... change any of the linkage parameters on the Animate screen and then recalculate the results there with the Recalc button The Done button on either the Input or Animate screen returns you to the Home...

Design of computationally efficient digital FIR filters and filter banks

... implementation of sharp filters and filter banks Section 1.1 and 1.2 give a brief review of these work CHAPTER Introduction 1.1 Literature Review I - Approaches of Designing Sharp FIR Filters Let a lowpass FIR ... viii List of Figures x List of Tables xv Introduction 1.1 1.1.1 Interpolated Finite Impulse Response (IFIR) Filters 1.1.2 1.2 Literature Review I - Approaches of Designing Sharp FIR Filters ... allocation of frequency bands The use of two halfband FIR filters as prototype filters and the combination of frequency-response masking (FRM) technique lead to significant savings in terms of number of...

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