Rectangular Horn Antennas With Limiting Plates for Symmetrical Pattern and Beam Efficiency Improvement

Fartookzadeh, Mahdi; Ghaffarian, Mohammad Saeid; Zamani, Ali; Fatemi, and Reza

doi:10.2528/pierc16090602

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…The schematic of the horn antenna and the dimensions are indicated in Figure A. Using such profiles for the conical horn antennas reduces the electric field near the antenna wall on the aperture, leading to low sidelobe‐levels (SLLs) as can be observed in the radiation pattern plot in Figure B. This can also be observed in the electric field distribution at the antenna aperture in Figure A.…”

Section: Near‐field Application Of the Proposed Tmcpsmentioning

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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Section: Near‐field Application Of the Proposed Tmcpsmentioning

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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“…The reason for this is that a linearly polarized wave with, say, vertical polarization returns with vertical polarization from the target and cannot be separated from Linearly polarized feed antennas can be used for both transmitting and receiving waves, in addition to polarization converters and filters for producing CP and separating transmitted and received waves. The most common types of feed antennas are rectangular or circular horn antennas with reduced sidelobe levels to improve efficiency [38,39]. Schematics of reflectors or space fed arrays for RHCP receivers and LHCP transmitters with polarization converters and filters are indicated in Figure 3a,b, which can be used in radar or imaging systems [40][41][42].…”

Section: Antenna Systems and Fa Diagramsmentioning

confidence: 99%

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

Fartookzadeh

2018

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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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E-plane sectionalized rectangular horn antenna

Fartookzadeh

Rashidi

Kazerooni

2021

AEU - International Journal of Electronics and Communications

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Rectangular Horn Antennas With Limiting Plates for Symmetrical Pattern and Beam Efficiency Improvement

Cited by 5 publications

References 11 publications

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

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

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

E-plane sectionalized rectangular horn antenna

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