Fixed-Length Arbitrary-Phase Tunable NRI-TL Metamaterial Phase Shifter for Antenna Beam-Steering Applications

Bilal, Asif; Quddious, Abdul; Kanno, Atsushi; Kawanishi, Tetsuya; Antoniades, Marco A.; Iezekiel, Stavros

doi:10.23919/eucap57121.2023.10133078

Cited by 4 publications

(1 citation statement)

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“…The capacitance of the diodes was altered by varying the biasing voltage, resulting in a continuous phase control of the transmitted signal. The design was implemented based on the concept of NRI‐TL metamaterials [21], where a transmission line is periodically loaded with lumped elements to form a repeating number of unit cells [1]. A basic circuit diagram of a single NRI‐TL unit cell in a π‐configuration is shown in Figure 2, consisting of a series capacitor, C 0 , between two transmission lines and two shunt inductors, 2 L 0 .…”

Section: Design Of the Reconfigurable Inductorless Nri‐tl Metamateria...mentioning

confidence: 99%

Reconfigurable inductorless negative‐refractive‐index transmission‐line metamaterial phase shifter for 5G antenna beam‐steering applications

Bilal,

Quddious,

Kanno

et al. 2023

IET Microwaves Antenna & Prop

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A reconfigurable inductorless negative‐refractive‐index transmission‐line (NRI‐TL) metamaterial phase shifter for sub‐6 GHz 5G antenna applications is proposed. The design consists of a microstrip transmission line loaded both in series and in parallel with varactor diodes to provide continuous tuning of the phase of the transmitted signal by varying the bias voltage applied to the varactors, without the need for variable inductor components. The total measured differential phase shift is 190° at 3.2 GHz, with a measured insertion loss of 1.5–2.7 dB in the frequency range of 3.2–3.6 GHz, when the biasing voltage of the varactors is varied between 0 and 7 V. The total size of the microstrip NRI‐TL phase shifter is 19.4 mm × 24 mm. The proposed reconfigurable phase shifter has been incorporated into the feeding network of a two‐element antenna array to demonstrate its use in beam‐steering applications. The measured results for the reconfigurable array show good impedance matching between 3 and 3.35 GHz for all biasing values, allowing continuous beam steering over a scanning range of 60°.

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Section: Design Of the Reconfigurable Inductorless Nri‐tl Metamateria...mentioning

confidence: 99%