Enhancement of Dual-Band Reflection-Mode Circular Polarizers Using Dual-Layer Rectangular Frequency Selective Surfaces

Fartookzadeh, Mahdi; Armaki, S. H. Mohseni

doi:10.1109/tap.2016.2593931

Cited by 16 publications

(9 citation statements)

References 26 publications

(47 reference statements)

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“…In addition, the components of these systems often have multiple choices initially. As an example, an improvement for RMCPs can be found in [49]. The next alternative in this system is the type of parabolic reflector and hyperbolic sub-reflector.…”

Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

“…In addition, the components of these systems often have multiple choices initially. As an example, an improvement for RMCPs can be found in [49].…”

Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

“…This type of FSS reflects half of the linearly polarized wave and transmits the other half with CP [51]. Other examples of this are dual-band RMCPs, which can be used to combine two separated systems with two different operating frequencies [44,49]. Challenges 2018, 9, x 8 of 14 Figure 7.…”

Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

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Value Engineering and Function Analysis: Frameworks for Innovation in Antenna Systems

Fartookzadeh

2018

Challenges

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Value engineering (VE) and function analysis (FA) are technological tools for the functional enhancement and cost reduction of engineering projects. They also help to overcome mental inertia by acknowledging the voice of the customer in complicated systems. Antenna engineering, providing electromagnetic remote links, is an important area in engineering science, with a large number of innovative concepts. However, managing innovative ideas to improve performance, reliability, quality, safety, and reduce life cycle costs, is still a work in progress. This research was designed to apply VE and FA as frameworks for innovative ideas in antenna systems, especially with regard to imaging and radar systems. FA diagrams free a designers' mind from tools to instead focus on purpose, which can help them to obtain better ideas for solutions to problems. It was identified that there were several options available for functionality enhancement and cost reduction. The required functionalities of the components of antenna systems, and their advantages and limitations were indicated. In addition, it was identified that some of the advantages and limitations appeared for combinations of the components. Alternative methods for applications, such as polarization conversion and the separation of outgoing and incoming electromagnetic waves, were studied. Circular polarization (CP) is important for two-way communication, since left-handed circularly polarized waves usually return with right-handed CP from targets. Therefore, various methods for producing CP were discussed, such as metamaterial-based linear to circular polarization converters and waveguide polarizers. Also, potential extra applications for these systems were explained. Two examples were: (1) merging multiple systems with different operating frequencies using multiband components; and (2) applying a feeding system for multiple reflectors using surfaces that reflect half of the wave and transmit the other half. Consequently, it was identified that the clearance of existing functions, prioritization of customers, identification of system bottlenecks requiring innovative methods, and better communication between users and designers, were the key benefits of VE and FA.

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Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

“…In addition, the components of these systems often have multiple choices initially. As an example, an improvement for RMCPs can be found in [49].…”

Section: Innovative Ideas For Antenna Systemsmentioning

confidence: 99%

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Value Engineering and Function Analysis: Frameworks for Innovation in Antenna Systems

Fartookzadeh

2018

Challenges

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“…Other structures also can be used for RMCPs with similar methods of operation. For example, L‐shaped patches and multilayer metamaterials have been used for wideband applications …”

Section: Introductionmentioning

confidence: 99%

Design of metasurface polarization converter for near‐field application; stacked conical horn antenna for circular polarization

Fartookzadeh

Armaki

2019

Int J RF Microw Comput Aided Eng

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In this article, a three-layer transmission mode linear to circular polarization converter (TMCP) is proposed with low-level reflection coefficient and axial ratio (AR) at 9 GHz. Each layer of the proposed TMCP consists of microstrip patches and lines, providing inductive TM impedance and capacitive TE impedance on each layer to produce 90 out of phase between TE and TM electromagnetic waves. By removing the middle layer of the proposed metamaterial, a two-layer TMCP with low-level axial ratio at 8 GHz is obtained. However, the proposed two-layer TMCP suffers from disagreements between the reflection coefficients of the TE and TM modes, which produce fluctuations on the AR results in the nearfield application. Low-level reflection coefficient and AR at 9 GHz achieved from the three-layer TMCP, indeed, make it efficient for the near-field of a horn antenna. Unit cells of the two-layer and three-layer TMCPs consisting patches and lines are simulated using periodic boundary conditions. In addition, the patches and lines are printed on a FR4 substrate and cut out in circle shapes. The three substrates are arranged at the determined separations and then installed in front of a profiled conical horn antenna. The measured AR of the antenna stacked by the three-layer TMCP is below 2 dB from 8.45 up to 9.6 GHz.

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“…By introducing some kind of asymmetric degeneracy separation unit in the structure, the two resonant modes can be excited with two orthogonal linear polarizations with nearly equal amplitude and 90°phase difference to achieve CP characteristics [1]. Numerous studies for antennas of single-feed circular polarization can be found in the literature [2][3][4][5][6][7]. Another method is to excite two resonant modes to achieve circular polarization by dual feed.…”

Section: Introductionmentioning

confidence: 99%

A Novel Concentric Annular-Ring Slot Dual-Band Circularly Polarized Microstrip Antenna

Cheng

Liu

2018

International Journal of Antennas and Propagation

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A simple structure concentric annular-ring slot dual-band circularly polarized (CP) microstrip antenna operating at ISM band (2.45 GHz) and 5G band (3.5 GHz) is proposed in this paper. The antenna achieves dual-band operation by digging two concentric annular-ring slots on the ground. And on the angular positions with 45 degrees inclined of each annular slot, two bent structures are loaded to generate circularly polarized radiation. The radiation of this antenna is bidirectional, and the directions of rotation are opposite. The measured results of the annular-ring slot microstrip antenna show good performance of dual-band circularly polarized characteristics.

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Enhancement of Dual-Band Reflection-Mode Circular Polarizers Using Dual-Layer Rectangular Frequency Selective Surfaces

Cited by 16 publications

References 26 publications

Value Engineering and Function Analysis: Frameworks for Innovation in Antenna Systems

Value Engineering and Function Analysis: Frameworks for Innovation in Antenna Systems

Design of metasurface polarization converter for near‐field application; stacked conical horn antenna for circular polarization

A Novel Concentric Annular-Ring Slot Dual-Band Circularly Polarized Microstrip Antenna

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