On the Phase Shift of a Microstrip Transmission Line Loaded with Magneto-Responsive Conducting Micro-Particles

Cleveland, Jerika; Lewis, Jacob; Mitra, Dipankar; Braaten, Benjamin D.; Allen, Jeffery; Allen, Monica

doi:10.1109/ieeeconf35879.2020.9329586

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“…Then, a 1 × 4 cylindrical phased array is excited with the proposed P-CRLH phase shifters for main beam scanning at the desired scan angles. The use of magneto-static-responsive conductive micron-sized particles has been shown to have practical applications for RF switches [20,21], EBG antennas [22], reconfigurable antennas [23,24], leaky-wave antennas [25,26], metamaterials [27], the phase shift of a microstrip transmission line [28], and comparison with a PIN diode and electromagnetic propagation through a dielectric medium [29]. The main advantages of the proposed design are (a) the use of a single substrate for particle integration unlike the requirements of the two separate substrates in [22,23], (b) no requirement of discontinuous transmission line as in [24], and (c) no need for a direct connection of a biasing circuitry as required in conventional RF switches.…”

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confidence: 99%

A Composite Right/Left-Handed Phase Shifter-Based Cylindrical Phased Array with Reinforced Particles Responsive to Magneto-Static Fields

et al. 2023

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A conformal cylindrical phased array antenna excited with composite right/left-handed (CRLH) phase shifters is proposed. The phase tuning of the CRLH phase shifter is achieved by embedding novel magneto-static field-responsive micron-sized particles in its structure. It is shown that through the tiny magnet activation of these novel magneto-static particles at appropriate locations along the length of CRLH stub and inter-digital fingers, variable phase shifts are obtained. The proposed particle-based CRLH phase shifter operates in C-band (5–6) GHz with a low insertion loss and phase error. The 1 × 4 cylindrical phased array is excited with the four unit cells of the proposed particle-embedded CRLH transmission line phase shifters to scan the main beam at desired scan angles. A prototype of a 1 × 4 cylindrical phased array excited with the particle-based CRLH phase shifters was fabricated, and the results show that the simulated results are in close agreement with the measured results. The conformal cylindrical array with the proposed particle-based CRLH phase shifters has great potential for use in printed and flexible electronics design where commercially available phase shifters have a definite drawback.

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