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Array factor, side lobes and grating lobes

Inequality Condition for Grating Lobes of Planar Phased Array

Inequality Condition for Grating Lobes of Planar Phased Array

... Phased array is an important kind of array for its flexibility, speed and multiple ...is grating lobes and blindness that mainly restrict the performance of arrays, and blindness results from ...

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Suppression of grating lobes for MMW sparse array setups

Suppression of grating lobes for MMW sparse array setups

... the grating lobes are not at the exact position in azimuth according to the used ...by grating lobes and main lobes in the two ...pictures, grating lobes are at dif- ...

5

Optimising Sidelobes and Grating Lobes in Frequency Modulated Pulse Compression

Optimising Sidelobes and Grating Lobes in Frequency Modulated Pulse Compression

... as grating lobes ...causes grating lobes due to the frequency ...of grating lobes, hence nullifying the grating ...

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Application of Frequency Diversity to Suppress Grating Lobes in Coherent MIMO Radar with Separated Subapertures

Application of Frequency Diversity to Suppress Grating Lobes in Coherent MIMO Radar with Separated Subapertures

... suppress grating lobes in coherent MIMO radar with separated subapertures is ...However, grating lobes would change to different positions if the frequencies of the radiated waveforms are ...

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A miniature HIFU excitation scheme to eliminate switching-induced grating lobes and nullify hard tissue attenuation

A miniature HIFU excitation scheme to eliminate switching-induced grating lobes and nullify hard tissue attenuation

... —Phased array transducers are increasingly prevalent in a therapeutic contex as they facilitate precise control of the beam intensity and ...Q factor and curved geometry of a therapeutic transducer lends ...

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Optimal Side Lobes Reduction of Linear Array Antenna Using Crow Search Algorithm

Optimal Side Lobes Reduction of Linear Array Antenna Using Crow Search Algorithm

... normalized array factor and it is synthesized using ...linear array factor, in the case of amplitude only control pattern synthesis is shown in Fig ...the array factor (AF) ...

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REDUCTION OF SIDE LOBES BY USING AUTO CORRELATION WITH OVER LAYING TECHNIQUES

REDUCTION OF SIDE LOBES BY USING AUTO CORRELATION WITH OVER LAYING TECHNIQUES

... Binary matrix representation of quantized linear FM (left) and Costas coding (right). 5.2 Modified Costas Pulses A modified Costas pulse combines Costas frequency coding with LFM within each Costas element (bit). Adding ...

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A genetic algorithm for the level control of nulls and side lobes in linear antenna arrays

A genetic algorithm for the level control of nulls and side lobes in linear antenna arrays

... the array factor in such a way that the objective of the optimiza- tion is ...the array, the array factor value at the particular null position must be less than the ref- erence ...the ...

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Design of Linear Antenna Arrays with Low Side Lobes Level Using Symbiotic Organisms Search

Design of Linear Antenna Arrays with Low Side Lobes Level Using Symbiotic Organisms Search

... 4.1.1. Example 1: 10 Elements LAA Using the equation of the fitness function associated with the array factor for 10 elements LAA, the SOS code is run for 20 independent times. Table 1 shows the best optimum ...

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Optimization of half wave dipole array for generation of ultra-low side lobes

Optimization of half wave dipole array for generation of ultra-low side lobes

... reflective array antennas are used. Reflective antenna array uses half wave dipole antennas as driven elements in front of flat reflective ...dipole array should provide narrow beam width and very ...

7

Design and Analysis of Parabolic Reflector with High Gain Pencil Beam and Low side lobes by Varying feed

Design and Analysis of Parabolic Reflector with High Gain Pencil Beam and Low side lobes by Varying feed

... 3. PARABOLIC ANTENNA A parabolic reflector can take two different forms. One configuration is that of parabolic right cylinder whose energy is collimated at a line that is parallel to the axis of the cylinder through ...

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Analysis on the Floquet Scattering Lobes from Microwave Calibration Targets

Analysis on the Floquet Scattering Lobes from Microwave Calibration Targets

... Scattering Lobes from Microwave Calibration Targets Qingsong Gao 1 , Yuan Tao 1 , Chunyan Jing 1 , Ming Jin 2, * , Dong Xia 3 , and Ming Bai 3 Abstract—The calibration target is a vital instrument for calibrating ...

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chapter Temporal Lobes

chapter Temporal Lobes

... This pathway is a series of parallel projections from the visual and auditory association areas into the polymodal regions of the superior temporal sulcus (see Figure 15.4B).. The projec[r] ...

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Centrifugal acceleration in the magnetotail lobes

Centrifugal acceleration in the magnetotail lobes

... 3 Swedish Institute of Space Physics, Uppsala, Sweden 4 Space Science Center, University of New Hampshire, Durham, NH, USA Received: 11 September 2009 – Revised: 2 February 2010 – Accepted: 10 February 2010 – Published: ...

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Plasma transport in the magnetotail lobes

Plasma transport in the magnetotail lobes

... Received: 21 January 2009 – Revised: 3 September 2009 – Accepted: 7 September 2009 – Published: 28 September 2009 Abstract. The Earth’s magnetosphere is populated by parti- cles originating from the solar wind and the ...

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How to Detect a Thyroid Pyramidal Lobes

How to Detect a Thyroid Pyramidal Lobes

... From January 2013 to March 2013, consecutive patients who were scheduled for thyroid surgery on the same day underwent prospective preoperative thyroid sonography performed by a single radiologist to detect thyroid ...

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Lung lobes and fissures: a morphological study

Lung lobes and fissures: a morphological study

... Methods: Fifty pairs of lungs were used for the study, obtained from 50 formalin-fixed adult Indian cadavers. The lung spec- imens were meticulously observed for the patterns of lobes and fissures, variations were ...

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Integration of dynamic behaviour variations in the stability lobes method: 3D lobes construction and application to thin-walled structure milling

Integration of dynamic behaviour variations in the stability lobes method: 3D lobes construction and application to thin-walled structure milling

... stability lobes method: 3D lobes construction and application to thin-walled structure milling Abstract Vibratory problems occurring during peripheral milling of thin-walled structures affect the quality of ...

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Stability Lobes Prediction in Thin Wall Machining

Stability Lobes Prediction in Thin Wall Machining

... must be precise. It will be highly impractical to perform impact tests at multiple stages of machining, hence the need for an offline approach to stability lobes prediction. Manuscript received March 18, 2009. ...

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Investigations into the role of the medial temporal lobes in autism

Investigations into the role of the medial temporal lobes in autism

... The complex nature of a neurodegenerative process means that the functions of the areas affected by the disease need not necessarily be totally disrupted. Similarly, the integrity of areas apparently unaffected can not ...

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