Antennas for mm-wave MIMO RADAR

Dash, Jogesh Chandra; Sarkar, Debdeep

doi:10.1007/978-981-19-1550-5_82-1

Cited by 1 publication

(1 citation statement)

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“…Millimeter-wave (mmWave) spectrum potential is currently being exploited in the fields of Internet of things (IoT) [ 1 ], vehicular communication [ 2 ], radio astronomy [ 3 ], mobile communications [ 4 ], energy harvesting [ 5 ], satellite communication [ 6 ], millimeter-wave imaging [ 7 ], etc. It endeavors to deliver higher bandwidth with low latency and a significant data rate.…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Circularly Polarized Millimeter-Wave Broadband Antenna Analyzed with a Link Budget for IoT Applications in an Indoor Scenario

Bhadravathi Ghouse,

Mane,

Ali

et al. 2024

Sensors

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Broadband antennas with a low-profile generating circular polarization are always in demand for handheld/ portable devices as CP antennas counter multipath and misalignment issues. Therefore, a compact millimeter-wave antenna is proposed in this article. The proposed antenna structure comprises two circular rings and a circular patch at the center. This structure is further embedded with four equilateral triangles at a 90° orientation. The current entering the radiator is divided into left and right circular directions. The equilateral triangles provide the return path for current at the differential phase of ±90°, generating circular polarization. Structural development and analysis were initially performed through the characteristic mode theory. It showed that Modes 1 to 4 generated good impedance matching from 20 to 30 GHz and Modes 1 to 5, from 30 to 40 GHz. It also demonstrated the summation of orthogonal modes leading to circular polarization. The antenna-measured reflection coefficient |S11| > 10 dB was 19 GHz (23–42 GHz), and the axial ratio at −3 dB was 4.2 GHz (36–40.2 GHz). The antenna gain ranged from 4 to 6.2 dBi. The proposed antenna was tested for link margin estimation for IoT indoor conditions with line-of-sight (LOS) and non-line-of-sight (NLOS) conditions. The communication reliability with co- and cross-polarization was also studied under these conditions, and the results proved to be satisfactory.

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