Narrowband Configurable Polarization Rotator Using Frequency Selective Surface Based on Circular Substrate-Integrated Waveguide Cavity

Mollaei, Masoud Sharifian Mazraeh

doi:10.1109/lawp.2017.2688703

Cited by 34 publications

(29 citation statements)

References 7 publications

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“…Figure shows full structures of

45 °

60 °

, and

90 °

polarization rotators based on enhanced circular SIW cavity. In the proposed structure, circular SIW cavity is preferred over square SIW cavity because of its higher quality factor . To delineate, for the same height to diameter ratio, the circular cavity quality factor is 8.3% higher than that of the square cavity.…”

Section: Conceptmentioning

confidence: 99%

“…Finally, another slot at the back of squared SIW cavity, which makes

α °

angle with the initial slot on the upper surface of circular SIW cavity, transmits the output waves with

α °

rotated polarization. Table demonstrates the differences between resonance frequencies of higher modes of square and circular SIW cavities with same resonance frequency for dominant modes …”

Section: Conceptmentioning

confidence: 99%

“…Table 1 demonstrates the differences between resonance frequencies of higher modes of square and circular SIW cavities with same resonance frequency for dominant modes. 12 3 | DES I G N…”

Section: Enhancement Of Frequency Performancementioning

confidence: 99%

“…In the proposed structure, circular SIW cavity is preferred over square SIW cavity because of its higher quality factor. 12 To delineate, for the same height to diameter ratio, the circular cavity quality factor is 8.3% higher than that of the square cavity. The reason of implementing enhanced circular SIW cavities for the full structure will be completely discussed in the section 2.1, part D.…”

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Broadband polarization rotator for arbitrary angles with enhanced substrate integrated waveguide cavities

Mollaei

Zanganeh

Heydarian

et al. 2018

Int J RF Microw Comput Aided Eng

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A broadband polarization rotator for rotating linear polarization to every intended angle is introduced. The proposed rotator is constituted of frequency selective surface and enhanced substrate integrated waveguide (SIW) cavities. Considering the current distribution of circular or square SIW cavity dominant modes, two slots are inserted on the front and back surfaces of the enhanced SIW cavities where the arrows of distributed current are orthogonal to them. Accordingly, the angle between the input and output slots determines the amount of polarization rotation. Moreover, a method of cascading enhanced circular and square SIW cavities for the proposed structure is analyzed to produce a sharper roll‐off response in stop‐bands. Design and simulation of the proposed method are presented for 45°, 60°, and 90° polarization rotators in Ka frequency band with 35 GHz central frequency. To verify the proposed method, a prototype of 90° polarization rotator is fabricated and measured. The measurement demonstrates 18.8% bandwidth which proves broadband performance of the proposed structure.

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“…Figure shows full structures of

45 °

60 °

, and

90 °

Section: Conceptmentioning

confidence: 99%

“…Finally, another slot at the back of squared SIW cavity, which makes

α °

angle with the initial slot on the upper surface of circular SIW cavity, transmits the output waves with

α °

rotated polarization. Table demonstrates the differences between resonance frequencies of higher modes of square and circular SIW cavities with same resonance frequency for dominant modes …”

Section: Conceptmentioning

confidence: 99%

“…Table 1 demonstrates the differences between resonance frequencies of higher modes of square and circular SIW cavities with same resonance frequency for dominant modes. 12 3 | DES I G N…”

Section: Enhancement Of Frequency Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Broadband polarization rotator for arbitrary angles with enhanced substrate integrated waveguide cavities

Mollaei

Zanganeh

Heydarian

et al. 2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…In contrast to reflective structures, transmissive surfaces are also practicable in which the incident wave passes through the structure, thus could be mounted straight in front of a sensor. Structures based on circular or rectangular SIW cavities excited with different slot shapes are shown in [10]- [12] for K a-band. An approach implementing a frequency selective surface with V-shaped slots on a PCB without cavities has been proposed in [13] for 10 GHz.…”

mentioning

confidence: 99%

Design of a Polarization Rotating SIW-Based Reflector for Polarimetric Radar Application

Freialdenhoven

Bertuch

Stanko

et al. 2020

IEEE Trans. Antennas Propagat.

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Polarimetric radar systems are beneficial to identifying and classifying targets but require multiple transmit or receive channels with different polarizations. This leads to a high hardware effort and thus higher costs. To use a single, linear polarized radar sensor as a polarimetric system, a frequencydependent, polarization rotating reflector which can be placed in front of the radar antenna is presented. The reflector is based on a frequency selective surface (FSS) consisting of slot-excited substrate integrated waveguide (SIW) resonators. Resonator modes are analyzed and an equivalent circuit diagram to describe the filter functionality is developed. For using the described FSS as reflective structure, the design focuses on 45 • oblique incidence. Different field vectors for normal and oblique incident angles are considered and different cavity modes for these cases are analyzed. An undesired mode is suppressed by an additional plated through via hole and slot impedances are matched. Reflector designs for normal and oblique incident angles are presented for 15 GHz (K u-band) and afterward adapted to 35 GHz (K a-band). The frequency band of operation with 12% fractional bandwidth is divided into two 4.5% subbands which allows a frequency-dependent polarization rotation of a linear polarized electromagnetic wave. Investigations on the fabrication accuracies are presented and reflectors for both bands are manufactured. Measurements are performed with a vector network analyzer and results fit well to the simulated curves. In the band of polarization rotation reflection, the matching is better than −13 dB and dielectric losses of less than 1 dB are achieved.

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Designing a polarization‐insensitive and ultra‐wideband transmissive polarization convertor using a tightly coupled dipole array

Kim

Nam

2022

Micro & Optical Tech Letters

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In this study, a polarization‐insensitive and ultra‐wideband transmissive polarization convertor (PC) is proposed. The proposed PC operates at 2.29–6.27 GHz (93.32%) for the same polarization reflection at ≤−10 dB, orthogonally rotated polarization transmission at ≥−1 dB, and a 0.22 λlow thickness at the lowest operating frequency. A dual‐polarized tightly coupled dipole array (TCDA) antenna is introduced for application in the wideband PC, where the operating bandwidth is related to the antenna bandwidth. Additionally, the polarization insensitivity is related to the feeding structure, which allows coupling of the receiving signal to the transmitting antenna. Furthermore, the operating principle is described in detail by showing the surface current on the TCDA and the feeding structure. Finally, unit cell simulations and measurements are presented to demonstrate the performance of the proposed PC.

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Narrowband Configurable Polarization Rotator Using Frequency Selective Surface Based on Circular Substrate-Integrated Waveguide Cavity

Cited by 34 publications

References 7 publications

Broadband polarization rotator for arbitrary angles with enhanced substrate integrated waveguide cavities

Broadband polarization rotator for arbitrary angles with enhanced substrate integrated waveguide cavities

Design of a Polarization Rotating SIW-Based Reflector for Polarimetric Radar Application

Designing a polarization‐insensitive and ultra‐wideband transmissive polarization convertor using a tightly coupled dipole array

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