scholarly journals Novel Beam Scan Method of Fabry–Perot Cavity (FPC) Antennas

2021 ◽  
Vol 11 (22) ◽  
pp. 11005
Author(s):  
Wook Jang ◽  
Yeong-geun Jeon ◽  
Han-jun Maeng ◽  
Jongyeong Kim ◽  
Dongho Kim
Keyword(s):  
Resonance Condition ◽  
Ground Plane ◽  
High Gain ◽  
Main Beam ◽  
Beam Scanning ◽  
Scanning Angle ◽  
Scanning Method ◽  
Fabry Perot ◽  
Phase Range ◽  
New Formula

A new beam scanning method of a Fabry–Perot cavity (FPC) antenna is proposed. To obtain high gain in a target direction with a reduced sidelobe level (SLL), we devised a tapered partially reflective surface (PRS) as a superstrate. Moreover, to attain various beam scanning directions, a phase-controllable artificial magnetic conductor (AMC) ground plane with a broad reflection phase range and high reflection magnitudes was introduced. In the proposed method, a new formula to satisfy an FP resonance condition in a cavity for a scanned beam is also suggested. According to the formula, the FPC antenna can precisely scan the main beam in designed target directions with well-maintained high gain, which has been hardly achievable. In addition, our method demonstrates the potential of electrical beam-scanning antennas by employing active RF chips on the AMC cells. To validate the method, we fabricated a prototype FPC antenna for a scanned beam at θ = 30°. Furthermore, we conducted an additional simulation for a different beam scanning angle as well. Good agreement between the expected and experimental results verifies our design approach.

scholarly journals Design of a Substrate-Integrated Fabry-Pérot Cavity Antenna forK-Band Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Truong Khang Nguyen ◽  
Ikmo Park
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Cost Effective ◽  
Frequency Selective Surface ◽  
High Gain ◽  
Hole Array ◽  
Impedance Bandwidth ◽  
Low Profile ◽  
Fabry Perot ◽  
Feeding Structure

This paper presents the design of a planar, low-profile, high-gain, substrate-integrated Fabry-Pérot cavity antenna forK-band applications. The antenna consists of a frequency selective surface (FSS) and a planar feeding structure, which are both lithographically patterned on a high-permittivity substrate. The FSS is made of a circular hole array that acts as a partially reflecting mirror. The planar feeding structure is a wideband leaky-wave slit dipole fed by a coplanar waveguide whose ground plane acts as a perfect reflective mirror. The measured results show that the proposed antenna has an impedance bandwidth of more than 8% (VSWR ≤ 2), a maximum gain of 13.1 dBi, and a 3 dB gain bandwidth of approximately 1.3% at a resonance frequency of around 21.6 GHz. The proposed antenna features low-profile, easy integration into circuit boards, mechanical robustness, and excellent cost-effective mass production suitability.

scholarly journals A Novel Asymmetric Patch Reflectarray Antenna with Ground Ring Slots for 5G Communication Systems

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1450
Author(s):  
M. Hashim Dahri ◽  
M. Haizal Jamaluddin ◽  
Fauziahanim C. Seman ◽  
Muhammad Inam Abbasi ◽  
Adel Y. I. Ashyap ◽  
...  
Keyword(s):  
Communication Systems ◽  
Ground Plane ◽  
Single Layer ◽  
High Gain ◽  
Circular Ring ◽  
Vertical Side ◽  
Phase Range ◽  
Dual Resonance ◽  
Reflectarray Antenna ◽  
5G Communication

The narrow bandwidth and low gain performances of a reflectarray are generally improved at the cost of high design complexity, which is not a good sign for high-frequency operation. A dual resonance asymmetric patch reflectarray antenna with a single layer is proposed in this work for 5G communication at 26 GHz. The asymmetric patch is developed from a square patch by tilting its one vertical side by a carefully optimized inclination angle. A progressive phase range of 650° is acquired by embedding a circular ring slot in the ground plane of the proposed element for gain improvement. A 332-element, center feed reflectarray is designed and tested, where its high cross polarization is suppressed by mirroring the orientation of asymmetric patches on its surface. The asymmetric patch reflectarray offers a 3 dB gain bandwidth of 3 GHz, which is 4.6% wider than the square patch reflectarray. A maximum measured gain of 24.4 dB has been achieved with an additional feature of dual linear polarization. Simple design with wide bandwidth and high-gain of asymmetric patch reflectarray make it suitable to be used in 5G communications at high frequencies.

scholarly journals Compact and Robust Fabry-Perot Cavity Antenna with PEC Wall

2021 ◽  
Vol 21 (3) ◽  
pp. 184-188
Author(s):  
Jae-Gon Lee
Keyword(s):  
Resonance Condition ◽  
High Gain ◽  
Dielectric Surface ◽  
Electric Conductor ◽  
High Gain Antenna ◽  
Half Wavelength ◽  
Quarter Wavelength ◽  
Fabry Perot ◽  
Field Radiation ◽  
Peak Gain

In this paper, a novel Fabry-Perot cavity (FPC) antenna with a perfect electric conductor (PEC) wall is proposed to design a structurally compact and robust high-gain antenna. Generally, the FPC antenna comprising a PEC ground and a partially reflective dielectric surface (PRDS) is required to have a half-wavelength height to satisfy the resonance condition. If a perfect magnetic conductor (PMC) is substituted for the PEC ground, the height of the FPC antenna can be reduced to a quarter wavelength. The PRDS of the proposed FPC antenna is located on the PEC ground to obtain the effect of a PMC. Moreover, PEC walls are employed to block leakage by a guided mode inside the PRDS. As a result, the proposed FPC antenna can be designed as a compact high-gain antenna although it is composed of PEC ground and PRDS. To verify its feasibility, we simulated and measured the performance of the proposed antenna regarding the reflection coefficient, peak gain, and far-field radiation pattern. Finally, the height of the proposed antenna was reduced by approximately 50% compared with the conventional antenna, while the peak gain is more than equal to that of the conventional antenna.

scholarly journals Magnetic field assisted beam-scanning leaky-wave antenna utilizing one-way waveguide

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Lujun Hong ◽  
Yun You ◽  
Qian Shen ◽  
Yazhou Wang ◽  
Xing Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Beam Width ◽  
Main Beam ◽  
Leaky Wave ◽  
Beam Scanning ◽  
Scanning Angle ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
The One ◽  
Iron Garnet

AbstractWe propose a Leaky-Wave Antenna (LWA) based on one-way yttrium-iron-garnet (YIG)-air-metal waveguide. We first analyze the dispersion of the LWA, showing the one-way feature and the radiation loss. Owing to the unique one-way dispersive property, the beam radiated from the LWA can have very narrow beam width, at the same time having large scanning angle. The main beam angle obtained by full-wave simulation is consistent with our theoretical prediction with the aid of the dispersion. For a given frequency, we can realize continuous beam scanning by varying the magnetic field, where the 3 dB beam width is much narrower than previously demonstrated. Our results pave a new way to realize continuous angle scanning at a fix frequency for modern communications.

scholarly journals High Gain Slot Array with Fabry-Perot Cavity Feeding Circuit

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Halim Boutayeb ◽  
Mourad Nedil
Keyword(s):  
Resonance Condition ◽  
Impedance Matching ◽  
High Gain ◽  
New Approach ◽  
Full Wave ◽  
Half Wavelength ◽  
Fabry Perot ◽  
Slot Arrays ◽  
High Dielectric ◽  
Reflecting Surfaces

A new approach for designing slot arrays using a Fabry-Perot cavity for the feeding circuit is presented. The proposed array has simpler and smaller feeding circuit compared to conventional feeding networks that have multiple dividers or combiners. The dividers and combiners are usually sources of losses. In addition, the profile of the proposed array is not limited by the half-wavelength resonance condition that exists for Fabry-Perot resonator antennas based on partially reflecting surfaces. The operating frequency is not sensitive to the profile of the antenna. A small profile can be achieved without the utilization of an artificial magnetic conductor or a substrate with high dielectric constant. To validate the proposed approach, full-wave numerical results are presented at 5.8 GHz showing good impedance matching, a high gain of about 22 dB, and an efficiency of 76%.

scholarly journals A 300-GHz low-cost high-gain fully metallic Fabry–Perot cavity antenna for 6G terahertz wireless communications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Basem Aqlan ◽  
Mohamed Himdi ◽  
Hamsakutty Vettikalladi ◽  
Laurent Le-Coq
Keyword(s):  
Communication Systems ◽  
Low Cost ◽  
Frequency Selective Surface ◽  
High Gain ◽  
Wireless Communication Systems ◽  
Beam Radiation ◽  
Compact Size ◽  
Fabry Perot ◽  
Operating Bandwidth ◽  
Polarization Level

AbstractA low-cost, compact, and high gain Fabry–Perot cavity (FPC) antenna which operates at 300 GHz is presented. The antenna is fabricated using laser-cutting brass technology. The proposed antenna consists of seven metallic layers; a ground layer, an integrated stepped horn element (three-layers), a coupling layer, a cavity layer, and an aperture-frequency selective surface (FSS) layer. The proposed aperture-FSS function acts as a partially reflective surface, contributing to a directive beam radiation. For verification, the proposed sub-terahertz (THz) FPC antenna prototype was developed, fabricated, and measured. The proposed antenna has a measured reflection coefficient below − 10 dB from 282 to 304 GHz with a bandwidth of 22 GHz. The maximum measured gain observed is 17.7 dBi at 289 GHz, and the gain is higher than 14.4 dBi from 285 to 310 GHz. The measured radiation pattern shows a highly directive pattern with a cross-polarization level below − 25 dB over the whole band in all cut planes, which confirms with the simulation results. The proposed antenna has a compact size, low fabrication cost, high gain, and wide operating bandwidth. The total height of the antenna is 1.24 $${\lambda }_{0}$$ λ 0 ($${\lambda }_{0}$$ λ 0 at the design frequency, 300 GHz) , with a size of 2.6 mm × 2.6 mm. The proposed sub-THz waveguide-fed FPC antenna is suitable for 6G wireless communication systems.

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