<i>Ka</i>-Band Passive Phased-Array Antenna With Substrate Integrated Waveguide Tunable Phase Shifter

Omam, Zahra Rahimian; Abdel‐Wahab, Wael M.; Raeesi, Amir; Palizban, Ardeshir; Pourziad, Ali; Nikmehr, Saeid; Gigoyan, Suren; Safavi‐Naeini, Safieddin

doi:10.1109/tap.2020.2983838

Cited by 19 publications

(9 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Terahertz (THz) waves with relatively low frequencies of several hundred gigahertz (GHz) are explored as the frequency band for next-generation wireless communication. Furthermore, a phased array antenna (PAA) [1][2][3][4][5] is a wellknown multi-antenna system that can effectively provide better gain and control the output direction of the radiation pattern without physically moving the antenna. Phase shifters used in the internal structure of PAAs must satisfy the following requirements: electrical control, variable phase change up to 360°, low loss, and fast switching time.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the electrospun-aligned microfiber composite with liquid crystal for terahertz wave variable phase shifters

Lang

INOUE

MORITAKE

2022

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

In this study, electrospun microfibers (MFs) were produced and used as key materials to optimize the composite with liquid crystal (LC) for terahertz (THz) wave phase shifters. These MFs, with an average diameter of 1.4 μm, were produced using the polymer solution concentration of 14 wt% and spinning voltage of 13 kV. When MFs were combined with LC, the measured results of the electrical characteristics showed that 14 wt% MFs provided an outstanding solution to the problem of a significant reduction in the natural birefringence of pure LC. The birefringence in the THz frequency range of the composite using 14 wt% MFs approached 90% compared with that using pure LC. Additionally, the decay time drastically shortened from hundreds of seconds for pure LC to hundreds of milliseconds for MF/LC composite and was independent of device thickness.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimization of the electrospun-aligned microfiber composite with liquid crystal for terahertz wave variable phase shifters

Lang

INOUE

MORITAKE

2022

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…The design choice of transmission line technology (for example microstrip line, strip line, coplanar, SIW technology) suitable for feeding network design is very important. Different methods to implement phase shift in SIW technology have been explored in [1][2][3][5][6].…”

Section: Introductionmentioning

confidence: 99%

Phase shifter based on the substrate integrated waveguide technology

Hnilicka

Oyedokun

Zálabský

et al. 2022

Journal of Electrical Engineering

View full text Add to dashboard Cite

Substrate integrated waveguide (SIW) technology is widely known transmission line technology adapted for use in various types of microwave circuits. This article deals with the analysis and design of a phase shifter based on the SIW technology. With simulation and measurement results obtained from the phase shifter with using air holes inside the structure, a test circuit was designed and manufactured. Results show that a phase balance of less than 10° is achieved with the experimental setup. The return loss value is better than 15 dB for working frequency band 8.85 GHz − 9GHz. The main benefit of this work is the easy of implementation air holes inside the structure and also the easy of manufacture of the circuits for antenna arrays, where a certain number of identical circuits is usually needed.

show abstract

“…Phase shifters are essential components in the design of beam steerable phased arrays. Their loss, complexity, and cost directly affect the phased arrays that they are incorporated in [1]- [4]. Due to the growing applications of phased arrays in radars, imaging, and high-speed communications, many research works have been developed to provide efficient, less complex, and less expensive phase shifters.…”

Section: Introductionmentioning

confidence: 99%

“…One of the most important challenges in the design of tunable phase shifters is to provide a large phase shift range with a low insertion loss. These two factors are combined as the figure of merit (FoM) of the phase shifter defined in (1), where φ is the total phase shift range provided by the phase shifter and IL max is the largest insertion loss throughout the tuning range [14].…”

Section: Introductionmentioning

confidence: 99%

“…However, we exclude considering them in this paper as the focus of this research work is in essentially passive phase shifters with negligible power consumption. In this way, our goal is to maximize the FoM as defined in (1). Due to the gain stages and the active power consumption in IC phase shifters, an FoM cannot be defined in the same manner for active IC phase shifters.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Continuously Tunable Phase Shifter Using Surface Waves

Ohadi

Eleftheriades

2021

IEEE J. Microw.

View full text Add to dashboard Cite

In this paper we present the theory, design, and implementation of a continuously tunable phase shifter using a surface-wave structure. The surface-wave travels on a reconfigurable impedance surface which is implemented by arranging dipoles on a single-layer PCB where a varactor is placed in the gap in the middle of each dipole. The proposed phase shifter operates at X-band from 8.5 to 10 GHz and it can provide 464 o phase shift with a figure of merit of 110 o /dB at 9.16 GHz. In the designed phase shifter, the varactor loss is less than all other loss mechanisms which makes it possible to achieve a high figure of merit at a high frequency range. The proposed phase shifter can be used in the design of phased arrays that require a high radiation efficiency at a relatively high frequency compared to the self-resonance frequency of the tunable electronic components.

show abstract

Ka-Band Passive Phased-Array Antenna With Substrate Integrated Waveguide Tunable Phase Shifter

Cited by 19 publications

References 31 publications

Optimization of the electrospun-aligned microfiber composite with liquid crystal for terahertz wave variable phase shifters

Optimization of the electrospun-aligned microfiber composite with liquid crystal for terahertz wave variable phase shifters

Phase shifter based on the substrate integrated waveguide technology

A Continuously Tunable Phase Shifter Using Surface Waves

Contact Info

Product

Resources

About