scholarly journals Design and Characterization of a Miniaturized Antenna Based on Palisade-Shaped Metasurface

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Ximing Li ◽  
Jingjing Yang ◽  
Zhigang Chen ◽  
Pengshan Ren ◽  
Ming Huang
Keyword(s):  
Dispersion Curve ◽  
Free Space ◽  
Maximum Size ◽  
Impedance Bandwidth ◽  
Compact Structure ◽  
Average Gain ◽  
Low Profile ◽  
Resonant Modes ◽  
Miniaturized Antenna

A palisade-shaped metasurface (PSMS) is presented to miniaturize the micropatch antenna. With the aid of the metasurface, a footprint miniaturization is obtained, and the dual resonant modes are produced simultaneously. Furthermore, through analyzing the dispersion curve of the metasurface to optimize the structure, the proposed antenna achieves a compact structure with a maximum size of 0.38λ02; a low profile of 0.08λ0 (where λ0 is the free-space wavelength at 5.0 GHz) exhibits a 19.6% impedance bandwidth (S11<−10dB) and an average gain of 6.76 dBi across the bandwidth.

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

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1358 ◽  
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.

Slot loaded EBG-based metasurface for performance improvement of circularly polarized antenna for WiMAX applications

2019 ◽  
Vol 12 (3) ◽  
pp. 212-220 ◽  
Author(s):  
Alka Verma ◽  
Anil Kumar Singh ◽  
Neelam Srivastava ◽  
Shilpee Patil ◽  
Binod Kumar Kanaujia
Keyword(s):  
Performance Improvement ◽  
Coplanar Waveguide ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Compact Structure ◽  
Circularly Polarized ◽  
Feed Line ◽  
Rectangular Patch ◽  
Low Profile ◽  
Good Agreement

AbstractIn this paper, an electromagnetic band gap (EBG) metasurface (MS) superstrate-based circularly polarized antenna for the WiMAX (3.5 GHz) band is proposed. The proposed structure comprises a 2 × 2 slot-loaded rectangular patch MS array that can be perceived as a polarization-dependent EBG MS superstrate. Furthermore, to achieve circular polarization, the proposed antenna has an inclined coupling slot onto the ground with a conventional coplanar waveguide feed line. The proposed antenna has a compact structure with a low profile of 0.037λ0 (λ0 stands for the free-space wavelength at 3.48 GHz) and a ground size of 30 × 30 mm2. The measured results show that the −10 dB impedance bandwidth for the proposed antenna is 34.6% and the 3-dB axial ratio (AR) bandwidth is 6.8% with a peak gain of 3.91 dBi in the desired operating band. Good agreement between the simulated and the measured results verifies the performance of the proposed antenna.

scholarly journals A Compact Slotted Patch Hybrid-Mode Antenna for Sub-6 GHz Communication

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Bei Huang ◽  
Mochao Li ◽  
Weifeng Lin ◽  
Jun Zhang ◽  
Gary Zhang ◽  
...  
Keyword(s):  
Frequency Band ◽  
Free Space ◽  
Operating Frequency ◽  
Impedance Bandwidth ◽  
Hybrid Mode ◽  
Average Gain ◽  
Operating Frequency Band ◽  
Rectangular Patch ◽  
Compact Size

A compact hybrid-mode antenna is proposed for sub-6 GHz communication. The proposed antenna is composed of a slotted rectangular patch, a feeding dipole, and a balun. Three modes are sequentially excited in a shared patch to achieve a compact size. A prototype antenna with a major size of 0.48 λ0 × 0.31 λ0 × 0.16 λ0 (λ0 is the wavelength in the free space at the center of the operating frequency band) is fabricated and measured. The measured results demonstrate an impedance bandwidth of 56.87% from 2.97 GHz to 5.33 GHz and an average gain of approximately 8.00 dBi with 1 dB variation in the operating frequency band of 3.0–5.0 GHz. The proposed antenna can be an element for microbase stations in sub-6 GHz communication.

scholarly journals DGS based monopole circular-shaped patch antenna for UWB applications

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Dattatreya Gopi ◽  
Appala Raju Vadaboyina ◽  
J. R. K. Kumar Dabbakuti
Keyword(s):  
Patch Antenna ◽  
Substrate Material ◽  
Impedance Bandwidth ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Compact Structure ◽  
Resonant Frequencies ◽  
Low Profile ◽  
Uwb Applications ◽  
Good Agreement

AbstractA simple low profile defected ground structure based monopole circular-shaped patch antenna is proposing for ultrawide-band applications. The design allows for a simple and compact structure on the FR-4 substrate material. The proposed design initially has a meager antenna gain and bandwidth. To increase the antenna bandwidth and gain, the defective ground structure is implemented with four dumble-shaped slots. Parametric analysis is considered to find the radius of circular patch for tuning of UWB frequency applications. The proposed MCP antenna resonates at 2.9 GHz, 9.1 GHz frequencies with a S11 of − 34.84 dB, − 33.74 dB, respectively, and achieves 8.1 GHz (2.5–10.6 GHz) impedance bandwidth concerning the − 10 dB reference line of the reflection coefficient. The gains are 8.4 dBi, 8.2 dBi for the two resonant frequencies, and the radiation patterns are semi-omnidirectional, omnidirectional. The proposed antenna has-been validated by observing good agreement between the simulation and the measured results.

scholarly journals Fabrication of CPW-Fed Fractal Antenna for UWB Applications with Omni-Directional Patterns

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Tohid Sedghi ◽  
Mahdi Jalali ◽  
Tohid Aribi
Keyword(s):  
Wireless Communication ◽  
Ground Plane ◽  
Impedance Bandwidth ◽  
Fractal Antenna ◽  
Frequency Range ◽  
Total Size ◽  
Low Profile ◽  
Low Profile Antennas ◽  
Miniaturized Antenna ◽  
Uwb Applications

Novel and compact CPW-fed antennas are proposed comprised of a fractal patch and modified ground-plane. The ground-plane is truncated at the center and includes dielectric notches at its side to enhance the antenna’s impedance bandwidth. The dimensions of the notches effectively control the upper and lower band edges of the antenna. The optimized antenna operates across 2.95–12.81 GHz forS11≤-10 dB. Omnidirectional radiation pattern is achieved over the full UWB frequency range. The miniaturized antenna has a total size of14×18×1 mm3. The characteristics of the proposed antenna are suitable for UWB wireless communication requiring low profile antennas.

scholarly journals A Central Symmetrical and Low-Profile Omnidirectional Circularly Polarized Antenna

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Zhe Wu ◽  
Lin Yang ◽  
Jiaji Wu ◽  
Zhensen Wu ◽  
Xi Li ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Free Space ◽  
Single Layer ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
Symmetric Configuration ◽  
Low Profile ◽  
Circular Structure ◽  
Strip Lines ◽  
Coaxial Probe

In this paper, a compact circularly polarized (CP) antenna with omnidirectional radiation is presented, which has a central symmetric configuration (CSC) and planar structure. It consists of three identical end-fire CP antenna units. Based on the combination of two parallel complementary current sources, each unit cell can be realized by a scalloped cavity and a couple of curved strip lines. Due to a single-layer circular structure with low profile, this configuration can be excited by a coaxial probe in the centre of the whole frame simultaneously. In addition, this prototype was miniaturized with a diameter of 32 mm (0.266λr, the wavelength of the centre frequency in free space is represented by λr) and a height of 1.5 mm (0.012λr). Centre resonance frequency 2.492 GHz is selected, resulting in an omnidirectional radiation and impedance bandwidth (VSWR ≤ 2) of 25 MHz (2481–2506 MHz).

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

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1164 ◽  
Author(s):  
Jian Dong ◽  
Chang Ding ◽  
Jinjun Mo
Keyword(s):  
Circular Polarization ◽  
Satellite Communication ◽  
Axial Ratio ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Polarization Conversion ◽  
Compact Structure ◽  
Low Profile ◽  
Unit Cells ◽  
Linearly Polarized

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.

scholarly journals A Wideband Differential-Fed Microstrip Patch Antenna Based on Radiation of Three Resonant Modes

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Taohua Chen ◽  
Yueyun Chen ◽  
Rongling Jian
Keyword(s):  
Patch Antenna ◽  
Free Space ◽  
Impedance Matching ◽  
Microstrip Patch Antenna ◽  
Impedance Bandwidth ◽  
Current Position ◽  
Microstrip Patch ◽  
Zero Current ◽  
Resonant Modes ◽  
Rectangular Strips

A wideband differential-fed microstrip patch antenna based on radiation of three resonant modes of TM12, TM30, and slot is proposed in this paper. Firstly, two symmetrical rectangular slots are cut on the radiating patch where the zero-current position of the TM30 mode excites another resonant slot mode. In addition, the slot’s length is enlarged to decrease the frequency of the slot mode with little effect on that of the TM30 mode. To further expand the impedance bandwidth, the width of patch is reduced to increase the frequency of the TM12 mode, while having little influence on that of the TM30 and slot modes. Moreover, a pair of small rectangular strips is adopted on the top of the feeding probes to achieve a good impedance matching. Finally, based on the arrangements above, a broadband microstrip patch antenna with three in-band minima is realized. The results show that the impedance bandwidth (Sdd11<−10 dB) of the proposed antenna is extended to 35.8% at the profile of 0.067 free-space wavelength. Meanwhile, the proposed antenna maintains a stable radiation pattern in the operating band.

scholarly journals A Dual-Band Base Station Antenna with a Split Ring for Sub-6 GHz Communication

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Bei Huang ◽  
Jie Cao ◽  
Weifeng Lin ◽  
Jun Zhang ◽  
Gary Zhang ◽  
...  
Keyword(s):  
Frequency Band ◽  
Free Space ◽  
Base Station ◽  
Dual Band ◽  
Operating Frequency ◽  
Impedance Bandwidth ◽  
Dual Polarization ◽  
Split Ring ◽  
Average Gain ◽  
Frequency Bands

A dual-band base station antenna is introduced in this paper. The proposed antenna is composed of baluns, bowtie patches, and a split ring. The two pairs of bowtie patches excited by the two orthogonal balun structures can achieve dual polarization. The split ring is used to yield two additional resonances to broaden the impedance bandwidth. In this way, a compact dual-band base station antenna is obtained with the size of 0.41 λc × 0.41 λc × 0.13 λc (λc is the wavelength in the free space at the lowest operating frequency band) and the average gain of 8.2 dBi. Moreover, the operating frequency bands of the proposed antenna cover 2515–2675 MHz, 3400–3600 MHz, and 4800–5000 MHz, which can function as an element for macro- or microcells in sub-6 GHz communications.

Compact dual-band millimeter-wave antenna for 5G WLAN

2021 ◽  
pp. 1-8
Author(s):  
Melvin Chamakalayil Jose ◽  
Sankararajan Radha ◽  
Balakrishnapillai Suseela Sreeja ◽  
Mohammed Gulam Nabi Alsath ◽  
Pratap Kumar
Keyword(s):  
Impedance Matching ◽  
Dielectric Substrate ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Defected Ground Structure ◽  
Compact Structure ◽  
Low Profile ◽  
Millimeter Wave Antenna ◽  
Measured Impedance

Abstract This paper presents a novel compact dual-band printed antenna with an omnidirectional radiation pattern for 5G WLAN. The antenna element comprises a star-shaped patch with six disc-shaped elements at the top and a defected ground structure at the bottom, having a radius of 3.77 mm for both. The proper feeding point and alignment with its element parameters help to achieve good impedance matching. The proposed antenna has a single center feed, a low profile, and a straightforward compact structure without any feeding complexity. A high reception fidelity antenna with comparable bandwidth and moderate gain is presented. The prototype radiator was printed on a 4 mm radius and a 1.6 mm thick dielectric substrate (Rogers RT/Duroid 5880), with a dielectric constant of 2.2. The designed antenna is fabricated and measured to validate the simulation result. The measured impedance bandwidth of 1.3 GHz (27.5–28.8 GHz) and 2.2 GHz (32.45–34.65 GHz) with a respective measured gain of 1.1 and 3.2 dBi are achieved at 28 and 34 GHz. The simulated radiation efficiency of above 95% is achieved for both bands. A good agreement between simulated and measured results of the proposed work shows that the proposed antenna is suitable for 5G short-range WLAN communications.

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