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Electrical and Computer Engineering, Canadian Journal of

Issue 3 • Date July 1992

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Displaying Results 1 - 14 of 14
  • Canadian Journal of Electrical and Computer Engineering - Front cover

    Publication Year: 1992 , Page(s): c1
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  • Inside front cover

    Publication Year: 1992 , Page(s): c2
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  • Table of contents

    Publication Year: 1992 , Page(s): 1
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  • On the membership survey

    Publication Year: 1992 , Page(s): 96
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  • Preface

    Publication Year: 1992 , Page(s): 97
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  • Element reduction in phased arrays using dual-mode self-scanning elements

    Publication Year: 1992 , Page(s): 98 - 106
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    A method for reducing the number of elements in phased arrays that uses dual-mode array elements such as horns or microstrip patches is introduced. It is shown that the excitation of the second mode can be used to locate preferentially a null on the element radiation pattern. In particular, when the null is moved to the array grating lobe location, it causes its cancellation and permits selection ... View full abstract»

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  • Phase centre analysis of planar array antennas: Application to a microwave landing system

    Publication Year: 1992 , Page(s): 107 - 112
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    A mathematical model is developed to determine the antenna phase centre and its uniqueness. The model is then used to investigate the phase centre location for the azimuth antenna of a microwave landing system (MLS) and to determine its movement due to beam scanning and various design or operational errors. It is shown that, for an ideal antenna, i.e. the error-free case, the phase centre coincide... View full abstract»

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  • L-band integrated feed array design for mobile communication satellites

    Publication Year: 1992 , Page(s): 113 - 119
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    The space segment of a mobile communication satellite system such as the North American Mobile Communication Satellite System (MSAT) must provide high radiated power densities on the ground to allow mobiles with small, low-gain antennas to communicate via satellite. With the emerging high-power mobile communication satellite systems, the risk of interference caused by passive intermodulation (PIM)... View full abstract»

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  • Reconfigurable L-band active array antennas for satellite communications

    Publication Year: 1992 , Page(s): 120 - 129
    Request Permissions | Click to expandAbstract | PDF file iconPDF (8465 KB)  

    Advances in solid-state technology have enhanced the feasibility of employing active antennas for multiple or shaped beams on board satellites. Design and experimental results for two different L-band active arrays using helical and microstrip radiating elements are presented. Receive feed arrays consisting of seven active modules have been breadboarded, where each module comprises a circularly po... View full abstract»

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  • Polarimetric radar for accurate navigation

    Publication Year: 1992 , Page(s): 130 - 135
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    A novel and commercially viable solution to the problem of blind navigation of a ship along a confined waterway is described. The solution is based on the use of radar polarimetry. At the heart of the system is a patented passive (nonpowered) retrodirective reflector that is capable of rotating the incident polarization through 90°. The reflector is efficient and robust, and has a wide azim... View full abstract»

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  • A comparison of recursive weighted least squares estimation and Kalman filtering for source dynamic motion evaluation

    Publication Year: 1992 , Page(s): 136 - 145
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    The problem of compensating for underwater motion effects (heave component) arises in a number of areas of current interest. Two models of the heave process are discussed. In the first, frequency-response-based higher-order models, including lead-lag factors, are obtained as a prelude to the application of the standard Kalman filter to estimate the heave component. The second model involves the di... View full abstract»

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  • Book review

    Publication Year: 1992 , Page(s): 146
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  • [Back inside cover]

    Publication Year: 1992 , Page(s): c3
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  • [Back cover - [advertisement]]

    Publication Year: 1992 , Page(s): c4
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Aims & Scope

The role of the Canadian Journal of Electrical and Computer Engineering is to provide scientific and professional activity for its members in Canada, the CJECE complements international journals and will be of particular interest to anyone involved in research and development activities in the field of electrical and computer engineering.

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Meet Our Editors

Editor-in-Chief
Dr. Shahram Yousefi
Dept. of Electrical and Computer
     Engineering
Queen's University