منابع مشابه
Optimization of a Wideband Tapped-Delay Line Array Antenna
In this paper, an optimal approach to design wideband tapped-delay line (TDL) array antenna is proposed. This approach lets us control the array angular and frequency response over a wide frequency band. To this end, some design restrictions are defined and a multi-objective optimization problem is constructed by putting the individual restrictions together. The optimal weights of the TDL proce...
متن کاملOptimization of a Wideband Tapped-Delay Line Array Antenna
In this paper, an optimal approach to design wideband Tapped-Delay Line(TDL) array antenna is proposed. This approach lets us control the array angular and frequency response over a wide frequency band. To this end, some design restrictions are defined and a multi-objective optimization problem is constructed by putting the individual restrictions together. The optimal weights of the TDL proces...
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This paper introduces a programmable delay line circuit suitable for Impulse Radio Ultra Wideband (IR-UWB) architectures. When dealing with Impulse Radio Technologies, fine synchronisation used to be related to relative high cost devices. The low cost, low power architecture reported, has been tested into a COTS (Commercial Off The Shelf) breadboard, but is being easily implemented into Silicon...
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A fully integrated CMOS wideband distributed variable delay line for time array beam-formers is presented. The delay line works over a full differential mode, and the delay cell function is based on differential amplifiers with active inductive peaking loads. A delay resolution of 15 ps is obtained with a maximum delay capability of 150 ps. The designed active delay line provides 3 scanning ang...
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algorithms, the geometrical properties such as size, shape, and orientation, of objects can also be investigated by ultrasonic imaging methods. An inherent problem with ultrasonic detection is the conflict between signal-to-noise ratio and resolution. If good resolution is to be obtained, the transmitted pulse cannot be long in duration. If short ultrasonic pulses are used, their energy is smal...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1961
ISSN: 0001-4966
DOI: 10.1121/1.1936625