Broadband and High-Gain Circularly-Polarized Antenna With Low RCS

Zarbakhsh, Saman; Akbari, Mohammad; Samadi, Fereshteh; Sebak, Abdel-Razik

doi:10.1109/tap.2018.2876234

Cited by 87 publications

(51 citation statements)

References 33 publications

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“…When θ = 45 • or θ = 135 • , the linear polarization wave can be decomposed into two orthogonal linear polarization components with equal amplitude. If θ = 45 • is used as an example for analysis, the electric field of the incident wave can be expressed as Equation (2) [18,19]:…”

Section: Mechanism Of Circular Polarizationmentioning

confidence: 99%

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A Low-Profile Wideband Linear-to-Circular Polarization Conversion Slot Antenna Using Metasurface

Dong

Ding

2020

Materials

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A new low-profile wideband linear-to-circular polarization conversion microstrip slot antenna based on a metasurface for C-band satellite communication applications is proposed in this paper. The metasurface basically consists of four unit cells with parasitic square cross gaps arranged in a 2 × 2 layout. By loading the metasurface on the microstrip slot antenna, linearly polarized (LP) waves from the source antenna are converted into circularly polarized (CP) waves. Then, by etching three more parasitic square cross gaps in the middle of the metasurface, enhanced impedance bandwidth and axial ratio bandwidth (ARBW) are achieved. Furthermore, an equivalent circuit and a phase analysis are presented to explain how a wide ARBW is realized by the metasurface. A final model with an overall size of 36 × 36 × 3.5 mm3 (approximately 0.65λ0 × 0.65λ0 × 0.06λ0 at 5.5 GHz) was designed and fabricated. The measured S11 bandwidth and 3 dB ARBW were 39.25% from 4.28 GHz to 6.37 GHz and 17.77% from 5.18 GHz to 6.19 GHz, respectively. As a result, the proposed antenna shows great potential for satellite communication applications due to its low profile and compact structure, wide impedance bandwidth, and wide axial ratio bandwidth.

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Section: Mechanism Of Circular Polarizationmentioning

confidence: 99%

“…Furthermore, the electric field can be rewritten in terms of the metasurface of the two circularly polarized components E 1 and E 2; thus, the axial ratio (AR) can be easily determined according to Equation (4) [18]:…”

Section: Mechanism Of Circular Polarizationmentioning

confidence: 99%

A Low-Profile Wideband Linear-to-Circular Polarization Conversion Slot Antenna Using Metasurface

Dong

Ding

2020

Materials

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“…Circularly polarized (CP) antennas have attracted significant research interest over the last decade in wireless communication systems. These types of antennas are more flexible in terms of antennas orientation when they are used as a transmitter and receiver, and they are good candidates for reducing polarization mismatch, due to misalignment between transmitting and receiving antennas (Shirazi & Honarvar, 2015; Zarbakhsh et al, 2018; Zhang et al, 2019). Circularly polarized techniques and ultrawide bandwidth (UWB) technology are among the approaches proposed to optimize the performance of communication systems (Malekpour et al, 2017; Zhang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Gain Enhancement of Wideband Circularly Polarized UWB Antenna Using FSS

2020

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This paper presents a new ultra-wideband (UWB) antenna system with circular polarization (CP). The antenna is a coplanar waveguide (CPW) feed structure with a modified inverted L-shaped radiating patch. A single-layer non-uniform frequency selective surface (FSS) composed of rectangular conductive patches is designed and used with the CP antenna to improve the CP characteristics and the gain of the antenna. According to the measured results, the 10 dB return-loss bandwidth of the antenna with the FSS extends from 3.7 to 11.1 GHz. The 3-dB measured axial ratio (AR) bandwidth is 58.15%, covering 5 to 9.1 GHz, and the measured peak gain is 4-9.4 dBi, showing an increase of about 3 dBi compared to the antenna without the FSS.

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“…[18][19][20][21][22] A low RCS and high gain FSS metasurface based broadband circularly polarized antenna provides an impedance bandwidth of 24.6%, 3 dB axial ratio bandwidth of 21% and RCS reduction bandwidth of 52% in the frequency range of 26.7 to 34.2 GHz. 23 While achieving CP along with broadband RCS reduction the antennas radiation characteristics get deteriorated or the RCS reduction bandwidth gets reduced.…”

Section: Introductionmentioning

confidence: 99%

RCS reduction using a wideband dual logarithmic step patch PRRM in microstrip patch antenna

Swaminathan¹,

Jeyaraj

Ahila³

et al. 2020

Micro & Optical Tech Letters

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Radar cross-section (RCS) reduction using a wideband dual logarithmic step patch polarization rotation reflective meta-surface (PRRM) in microstrip patch antenna is proposed. The investigation proposes the use of designed PRRM to construct a low profile microstrip patch antenna with multiband operation, circular polarization, monostatic RCS reduction in a wider bandwidth, and virtually constant gain over the entire RCS reduction bandwidth. A dual logarithmic step patch PRRM unit cell element with FR 4 superstrate is presented and it provides a relative bandwidth of 70.24% and polarization conversion ratio (PCR) greater than 90% from 6.65 to 13.85 GHz. The designed PRRM unit cells are arranged in 3 × 4 array on both sides of the designed microstrip patch antenna. This arrangement makes the antenna to operate circularly polarized at 10.33, 14.33, and 19.16 GHz with axial ratio values of 2.807, 1.963, and 1.471 dB, respectively. Also, it provides monostatic RCS reduction with 77.9% bandwidth ranging from 6.39 to 14.5 GHZ and virtually constant gain ranging from 8 to 19.7 GHz. The performance of the microstrip patch antenna with the designed PRRM are simulated and experimentally verified.

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Broadband and High-Gain Circularly-Polarized Antenna With Low RCS

Cited by 87 publications

References 33 publications

A Low-Profile Wideband Linear-to-Circular Polarization Conversion Slot Antenna Using Metasurface

A Low-Profile Wideband Linear-to-Circular Polarization Conversion Slot Antenna Using Metasurface

Gain Enhancement of Wideband Circularly Polarized UWB Antenna Using FSS

RCS reduction using a wideband dual logarithmic step patch PRRM in microstrip patch antenna

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