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Short range continuous wave radar for target detection in various mediums
Author(s) -
Tauqeer Tauseef,
Islam Maira,
Aziz A. K.
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28628
Subject(s) - microcontroller , detector , radar , antenna (radio) , acoustics , amplifier , wave radar , continuous wave radar , metre , amplitude , signal (programming language) , microwave , electronic engineering , pulse doppler radar , engineering , electrical engineering , computer science , optics , physics , radar imaging , telecommunications , cmos , astronomy , programming language
This article presents simulation and hardware implementation of a low cost radar that can be used as a speed sensor or a metal detector. The overall hardware costs only U.S. $25 and has maximum free space range of 3.65 m. Its underground range is 4.3 cm under wet soil conditions with free space distance of 50 cm above ground. The proposed model provides a basis for designing a mine detector based on the amplitude of the reflected wave. As the frequency of the wave or the water content of the ground increases, the amplitude of the reflected wave decreases making the detection difficult. A comparison between different attenuations offered to the signal under different soil conditions and different Target's materials is presented. The frequency selected for the design implementation was 10.525 GHz. A speed sensor module, HB100 miniature microwave motion sensor was used to sense the reflected wave and was interfaced with a frequency meter implemented using a microcontroller. The module transmitted a continuous wave with amplitude of 15 dBm. The wave reflected from the target was received by module's receiving antenna. It was amplified using a noninverting amplifier and was converted to pulses using a comparator. These pulses were fed to the in‐house microcontroller‐based frequency meter, and the speed of the target was observed on the LCD interfaced. Complete ground modeling for different water content and free space modeling was also done. The proposed model provides a low cost stand‐alone implementation of the overall radar. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2484–2489, 2014