Abstract
Radar is a type of wireless, noncontact sensor that does not need to be placed on or near a test object for detection. A key component of any radar sensor is the antenna. Among different types of antennas, the linear tapered slot antenna (LTSA) is a wideband antenna that has the advantages of small size, design simplicity, and easy adaptation to an array. This study examined and analyzed the 10 primary parameters that define the LTSA design when operated in the ultra-wideband (UWB) frequency range. The study method involved varying each of the 10 parameters to discern how the variations impact the three critical characteristics of an antenna, namely, (1) return loss, (2) the far field radiation pattern on the E-plane, and (3) the far field radiation pattern on the H-plane. By analyzing the changes in these critical characteristics, a set of design recommendations for the 10 parameters was developed for the LTSA.
Highlights
A radar sensor is a noncontact sensor that can see through walls, which makes it perfect for various applications, such as fall detection for the elderly [1], 3D tracking [2], etc
This study examined and analyzed all 10 primary parameters regarding their individual impact on linear tapered slot antenna (LTSA) design
The result is a set of recommendations for LTSA design to operate within the UWB
Summary
A radar sensor is a noncontact sensor that can see through walls, which makes it perfect for various applications, such as fall detection for the elderly [1], 3D tracking [2], etc. Among the frequencies on which a radar sensor can be operated, ultra-wideband (UWB) is a good choice due to its wide spectrum and well-defined specification [3] for implementation. A key component of any radar sensor is its antenna. For UWB directional radar, previous studies have commonly deployed four types of antenna: microstrip disc [4,5,6,7], tapered slot [8], sinuous [9], and Yagi–Uda [10]. The microstrip disc antenna generates two main lobes [5], not just one, which makes it a bidirectional antenna instead of unidirectional, like the tapered slot, sinuous, or Yagi–Uda antennas. Several designs have been devised to turn the bidirectional nature of the microstrip disc antenna into being unidirectional [4,6,7]
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