Millimeter Wave Fabry-Perot Resonator Antenna Fed by CPW with High Gain and Broadband

A novel millimeter wave coplanar waveguide (CPW) fed Fabry-Perot (F-P) antenna with high gain, broad bandwidth, and low profile is reported. The partially reflective surface (PRS) and the ground form the F-P resonator cavity, which is filled with the same dielectric substrate. A dual rhombic slot loop on the ground acts as the primary feeding antenna, which is fed by the CPW and has broad bandwidth. In order to improve the antenna gain, metal vias are inserted surrounding the F-P cavity. A CPW-to-microstrip transition is designed to measure the performances of the antenna and extend the applications. The measured impedance bandwidth ofS11less than −10 dB is from 34 to 37.7 GHz (10.5%), and the gain is 15.4 dBi at the center frequency of 35 GHz with a 3 dB gain bandwidth of 7.1%. This performance of the antenna shows a tradeoff among gain, bandwidth, and profile.

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

International Journal of Antennas and Propagation ◽

10.1155/2015/373801 ◽

2015 ◽

Vol 2015 ◽

pp. 1-12 ◽

Cited By ~ 6

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.

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Double Meander Dipole Antenna Array with Enhanced Bandwidth and Gain

International Journal of Antennas and Propagation ◽

10.1155/2021/9936781 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Halgurd N. Awl ◽

Rashad H. Mahmud ◽

Bakhtiar A. Karim ◽

Yadgar I. Abdulkarim ◽

Muharrem Karaaslan ◽

...

Keyword(s):

Antenna Array ◽

High Gain ◽

Dipole Antenna ◽

Operating Frequency ◽

Center Frequency ◽

Impedance Bandwidth ◽

Frequency Range ◽

Wide Bandwidth ◽

Low Profile ◽

Operating Frequency Range

In this paper, a new design of high gain and wide bandwidth microstrip patch antenna array containing double meander dipole structure is proposed. Two in-phase resonant frequencies in the Ku-band (12–18 GHz) could be achieved in the double meander dipole array structure, which lead to enhance impedance bandwidth without costing extra design section. Besides, further enhanced gain of 2 dBi of the array over the entire operating frequency range has been achieved by introducing a double-layer substrate technique. The proposed antenna has been fabricated using the E33 model LPKF prototyping PCB machine. The measurement results have been performed, and they are in very good agreement with the simulation results. The measured –10 dB impedance bandwidth indicates that the array provides a very wide bandwidth which is around 30% at the center frequency of 15.5 GHz. A stable gain with a peak value of 10 dBi is achieved over the operating frequency range. The E- and H-plane radiation patterns are simulated, and a very low sidelobe level is predicted. The proposed antenna is simple and has relatively low-profile, and it could be a good candidate for millimeter wave communications.

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Wideband low-profile aperture-coupled circularly polarized antenna based on metasurface

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078718000351 ◽

2018 ◽

Vol 10 (7) ◽

pp. 851-859 ◽

Cited By ~ 3

Author(s):

Qi Zheng ◽

Chenjiang Guo ◽

Jun Ding

Keyword(s):

Coplanar Waveguide ◽

Axial Ratio ◽

High Gain ◽

Mode Analysis ◽

Impedance Bandwidth ◽

Equivalent Circuit Analysis ◽

Circularly Polarized ◽

Low Profile ◽

Compact Size ◽

Feeding Structure

AbstractIn this paper, a metasurface-based aperture-coupled circularly polarized (CP) antenna with wideband and high radiation gain is proposed and analyzed. The proposed antenna is comprised of coplanar waveguide coupling with 4 × 4 corner truncated square patches, which show compact size and low profile. The mechanism of the CP antenna is analyzed theoretically based on the mode analysis and equivalent circuit analysis. The parameters of feeding structure and truncated corner are studied and optimized to achieve wide impedance bandwidth (BW) and axial ratio (AR) BW. Finally, an overall size of 38.8 mm × 38.8 mm × 3.5 mm (0.71λ0 × 0.71λ0 × 0.064λ0 at 5.5 GHz) CP antenna is proposed and fabricated. The simulated results demonstrate that over 41.7% impedance BW (S11 < −10 dB) of 4.55–6.95 GHz and 3 dB AR BW of 5.05–6.15 GHz (fractional BW is about 19.6%) are achieved. In addition, the antenna yielded a broadside CP radiation with a high gain average about 7.5 dBic. Experimental results are in good agreement with the simulated ones.

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A Patch/Dipole Hybrid-Mode Antenna for Sub-6GHz Communication

Sensors ◽

10.3390/s19061358 ◽

2019 ◽

Vol 19 (6) ◽

pp. 1358 ◽

Cited By ~ 1

Author(s):

Bei Huang ◽

Weifeng Lin ◽

Jialu Huang ◽

Jun Zhang ◽

Gary Zhang ◽

...

Keyword(s):

Free Space ◽

Narrow Band ◽

High Gain ◽

Impedance Bandwidth ◽

Dipole Mode ◽

Frequency Range ◽

Hybrid Mode ◽

Average Gain ◽

Broad Bandwidth ◽

Low Profile

A low-profile antenna with a high gain and broad bandwidth is proposed for Sub-6GHz communication in this paper. A narrow-band patch mode and a narrow-band dipole mode are shared in one radiator and simultaneously excited to broaden the bandwidth. A compact prototype with a projection size of 0.90 λ0 × 0.78 λ0 and a profile of 0.13 λ0 (λ0 is the wavelength in the free space at the center of the operating frequency) is fabricated and measured. The measurement demonstrates an impedance bandwidth of 67.50%, covering the frequency range from 2.75 GHz to 5.45 GHz and an average gain of 8.4 dBi in the operating band of 3.0–5.0 GHz.

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Compact Broadband Circularly Polarized CPW-Fed Antenna with Characteristic Mode Analysis

International Journal of Antennas and Propagation ◽

10.1155/2022/9002700 ◽

2022 ◽

Vol 2022 ◽

pp. 1-11

Author(s):

Wei Xu ◽

Jingchang Nan ◽

Mingming Gao

Keyword(s):

Coplanar Waveguide ◽

Impedance Matching ◽

Axial Ratio ◽

Mode Analysis ◽

Center Frequency ◽

Impedance Bandwidth ◽

Characteristic Mode ◽

Circularly Polarized ◽

Low Profile ◽

Compact Size

A compact circularly polarized (CP) antenna is proposed for low-profile and wideband operation based on characteristic mode analysis (CMA). A ring patch with a gap and two arc-shaped metallic stubs as the radiator is analyzed and optimized by CMA to figure out the orthogonal modes and operating frequency band for potential good axial ratio (AR) performance. The studies of these CP modes provide a physical insight into the property of broadband circular polarization. Such an in-depth understanding paves the way for the proposal of novel CP antenna with separation between the design of radiator and feeding network. A 50-Ω coplanar waveguide (CPW) is introduced and placed appropriately to excite the desired modes based on the information from CMA, which employs two asymmetric ground planes to improve the performance in terms of AR and impedance matching. The antenna with a compact size of 0.71λ0 × 0.76λ0 × 0.038λ0 (λ0 is the free-space wavelength at the center frequency of the 3-dB AR bandwidth) is fabricated and measured for validation. The realized gain varies from 1.6 to 3.1 dBic over the operating bandwidth characterized by the measured 10-dB impedance bandwidth of 83.8% (3.98–9.72 GHz) and 3-dB AR bandwidth of 70.3% (4.59–9.57 GHz), respectively.

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Performance Improvement of Substrate Integrated Cavity Fed Dipole Array Antenna Using ENZ Metamaterial for 5G Applications

Sensors ◽

10.3390/s22010125 ◽

2021 ◽

Vol 22 (1) ◽

pp. 125

Author(s):

Shaza El-Nady ◽

Rania R. Elsharkawy ◽

Asmaa I. Afifi ◽

Anwer S. Abd El-Hameed

Keyword(s):

Coplanar Waveguide ◽

Impedance Matching ◽

High Gain ◽

Dipole Antenna ◽

Center Frequency ◽

Antenna Element ◽

Gain Enhancement ◽

Radiated Power ◽

Low Profile ◽

Unit Cells

This paper exhibits a high-gain, low-profile dipole antenna array (DAA) for 5G applications. The dipole element has a semi-triangular shape to realize a simple input impedance regime. To reduce the overall antenna size, a substrate integrated cavity (SIC) is adopted as a power splitter feeding network. The transition between the SIC and the antenna element is achieved by a grounded coplanar waveguide (GCPW) to increase the degree of freedom of impedance matching. Epsilon-near-zero (ENZ) metamaterial technique is exploited for gain enhancement. The ENZ metamaterial unit cells of meander shape are placed in front of each dipole perpendicularly to guide the radiated power into the broadside direction. The prospective antenna has an overall size of 2.58 λg3 and operates from 28.5 GHz up to 30.5 GHz. The gain is improved by 5 dB compared to that of the antenna without ENZ unit cells, reaching 11 dBi at the center frequency of 29.5 GHz. Measured and simulated results show a reasonable agreement.

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CPW-fed circularly-polarized antenna array with high front-to-back ratio and low-profile

Open Physics ◽

10.1515/phys-2018-0082 ◽

2018 ◽

Vol 16 (1) ◽

pp. 651-655 ◽

Cited By ~ 1

Author(s):

Yilin Liu ◽

Kama Huang

Keyword(s):

Antenna Array ◽

Coplanar Waveguide ◽

Ground Plane ◽

Axial Ratio ◽

Antenna Design ◽

Impedance Bandwidth ◽

Feeding Method ◽

Circularly Polarized ◽

Low Profile ◽

Novel Design

Abstract A novel design of a coplanar waveguide (CPW) feed antenna array with circular polarization (CP) and a high front-to-back ratio is described. The proposed CP array is achieved by using a compact CPW–slotline transition network etched in the ground plane. The measured results show that this kind of feeding method can improve the impedance bandwidth, as well as the axial ratio bandwidth of the CP antenna array and provide adequate gain. The proposed array can achieve a 6.08% impedance bandwidth and a 4.10% CP bandwidth. Details of the antenna design and experimental results are presented and discussed.

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Coplanar waveguide-fed ISM band implantable crossed-type triangular slot antenna for biomedical applications

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078713000883 ◽

2013 ◽

Vol 6 (2) ◽

pp. 167-172 ◽

Cited By ~ 10

Author(s):

Srinivasan Ashok Kumar ◽

Thangavelu Shanmuganantham

Keyword(s):

Biomedical Applications ◽

Biomedical Application ◽

Coplanar Waveguide ◽

Impedance Matching ◽

High Gain ◽

Slot Antenna ◽

Center Frequency ◽

Ism Band ◽

High Data ◽

Implantable Antenna

A novel coplanar waveguide fed Industrial, Scientific, and Medical (ISM) band implantable crossed-type triangular slot antenna is proposed for biomedical applications. The antenna operates at the center frequency of 2450 MHz, which is in ISM band, to support GHz wideband communication for high-data rate implantable biomedical application. The size of the antenna is 78 mm3 (10 mm × 12 mm × 0.65 mm). The simulated and measured bandwidths are 7.9 and 8.2% at the resonant frequency of 2.45 GHz. The specific absorption rate distribution induced by the implantable antenna inside a human body tissue model is evaluated. The communication between the implanted antenna and external device is also examined. The proposed antenna has substantial merits such as miniaturization, lower return loss, better impedance matching, and high gain over other implanted antennas.

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Compact and Low-Profile UWB Antenna Based on Graphene-Assembled Films for Wearable Applications

Sensors ◽

10.3390/s20092552 ◽

2020 ◽

Vol 20 (9) ◽

pp. 2552 ◽

Cited By ~ 3

Author(s):

Ran Fang ◽

Rongguo Song ◽

Xin Zhao ◽

Zhe Wang ◽

Wei Qian ◽

...

Keyword(s):

Human Body ◽

Coplanar Waveguide ◽

Wearable Devices ◽

Impedance Bandwidth ◽

Body Measurements ◽

Uwb Antenna ◽

Wearable Antennas ◽

Low Profile ◽

Close Proximity ◽

Feeding Structure

In this article, a graphene-assembled film (GAF)-based compact and low-profile ultra-wide bandwidth (UWB) antenna is presented and tested for wearable applications. The highly conductive GAFs (~106 S/m) together with the flexible ceramic substrate ensure the flexibility and robustness of the antenna, which are two main challenges in designing wearable antennas. Two H-shaped slots are introduced on a coplanar-waveguide (CPW) feeding structure to adjust the current distribution and thus improve the antenna bandwidth. The compact GAF antenna with dimensions of 32 × 52 × 0.28 mm3 provides an impedance bandwidth of 60% (4.3–8.0 GHz) in simulation. The UWB characteristics are further confirmed by on-body measurements and show a bending insensitive bandwidth of ~67% (4.1–8.0 GHz), with the maximum gain at 7.45 GHz being 3.9 dBi and 4.1 dBi in its flat state and bent state, respectively. Our results suggest that the proposed antenna functions properly in close proximity to a human body and can sustain repetitive bending, which make it well suited for applications in wearable devices.

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