scholarly journals Extremely Low-Profile Monopolar Microstrip Antenna with Wide Bandwidth

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5295
Author(s):  
Youngseok Ha ◽  
Jae-il Jung ◽  
Sunghee Lee ◽  
Seongmin Pyo
Keyword(s):  
Microstrip Antenna ◽  
High Speed ◽  
Impedance Bandwidth ◽  
Substrate Thickness ◽  
Frequency Bandwidth ◽  
Broad Bandwidth ◽  
Directional Radiation ◽  
Low Profile ◽  
Thick Substrate ◽  
Symmetrical Center

In this paper, we propose a new monopolar microstrip antenna for a high-speed moving swarm sensor network. The proposed antenna shows an extremely thin substrate thickness supported with an omni-directional radiation pattern and wide operation frequency bandwidth. First, to achieve the low-profile monopolar microstrip antenna, the symmetrical center feeding network and the gap-coupled six arrayed patches which form a hexagonal microstrip radiator were utilized. The partially loaded ground-slots under the top patches were employed to improve the radiation performance and adjust the impedance bandwidth. Second, to obtain the broad bandwidth of the low-profile monopolar microstrip antenna, the degenerated non-fundamental TM02 modes, that is, even and odd TM02 modes, were carefully analyzed. To verify the feasibility of the degenerated TM02 mode operation, the parametric study of the proposed antenna was theoretically investigated and implemented with the optimized parameter dimensions. Finally, the fabricated antenna showed a 0.254 mm-thick substrate and demonstrates 1.5-wavelength resonant monopolar radiation with broad impedance bandwidth of 855 MHz and its factional bandwidth of 15.24% at the resonant frequency of 5.57 GHz.

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

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Xue-Xia Yang ◽  
Guan-Nan Tan ◽  
Bing Han ◽  
Hai-Gao Xue
Keyword(s):  
Millimeter Wave ◽  
Coplanar Waveguide ◽  
Dielectric Substrate ◽  
High Gain ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Gain Bandwidth ◽  
Broad Bandwidth ◽  
Low Profile ◽  
Fabry Perot

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.

scholarly journals Mesh-Grounded Monopolar Hexagonal Microstrip Antenna for Artillery-Launched Observation Round

Electronics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1279
Author(s):  
Lee ◽  
Kim ◽  
Pyo
Keyword(s):  
Microstrip Antenna ◽  
Ground Plane ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Ground Structure ◽  
Periodic Arrays ◽  
Mesh Width ◽  
Low Profile ◽  
Slot Arrays ◽  
Metal Wires

This paper presents a novel low-profile microstrip antenna with an omnidirectional radiation pattern for an artillery-launched observation round. The proposed antenna consists of one centered hexagonal patch for a feeding network and six periodic arrays of a trapezoid patch for a radiator. The trapezoid patch is equal to a half-sized hexagonal patch based on geometrical symmetry. A gap-coupled one-hexagonal patch and six trapezoid patches are supported on a nonfundamental TM02 mode for vertically polarized omnidirectional radiation patterns. In addition, a meshed ground structure for the proposed antenna is employed to improve the impedance bandwidth. The thin metal wires that are formed by the meshed ground structure yield six trapezoid slot arrays for the feeding network and three triangular slot arrays for the radiator on the ground plane. To verify the feasibility of the meshed ground structure, the mesh width, denoted by w, was investigated theoretically and optimized carefully to enlarge the impedance bandwidth of the proposed antenna. Finally, the proposed antenna, with a mesh width of 0.2 mm, successfully demonstrated excellent monopolar radiation at a resonant frequency of 5.84 GHz, a realized gain of 5.27 dBi, and an impedance bandwidth of 452 MHz from 5.583 GHz to 6.035 GHz with respect to 7.78% at a center frequency of 5.809 GHz.

scholarly journals New Compact Wideband Microstrip Antenna for Wireless Applications

2018 ◽  
Vol 7 (4) ◽  
pp. 85-92 ◽  
Author(s):  
S. Shandal ◽  
Y. S. Mezaal ◽  
M. Kadim ◽  
M. Mosleh
Keyword(s):  
Microstrip Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Computer Applications ◽  
Impedance Bandwidth ◽  
Substrate Thickness ◽  
Resonant Frequencies ◽  
Wireless Applications ◽  
Rectangular Patch ◽  
Rectangular Microstrip Antenna

In this paper, a miniature rectangular microstrip antenna over partial ground plane is presented by utilizing a space-filling property of fractal geometry in this design. It is simulated by High Frequency Software Simulator (HFSS) software, fabricated and tested by Vector Network Analyzer (VNA).Two types of slots are introduced in order to enhance antenna parameters such as bandwidth and return loss S1.1. This antenna is fabricated on FR4 substrate with a small size of (18 x 16 x 1.5) mm3, 1.5mm substrate thickness, 4.3 permittivity and 0.02 loss tangent. To feed this antenna,  microstrip line feed is used. This antenna is implemented for wide bandwidth (4.8-11.6) GHz, and has three resonant frequencies at 5.5GHz, 8.3GHz and 10.7GHz with impedance bandwidth of 6.8GHz. The gap value g between partial ground plane and rectangular patch at top layer is optimized in order to achieve optimal simulated return loss S1.1 is (-46,-32,-14) dB at three resonant frequencies (5.5, 8.3, 10.7) GHz and optimal radiation efficiency of 93.42% with gain of 3.63dB. The simulated results have tolerable agreement with measured results. This antenna is suitable for wireless computer applications within  C and X band  communications.

scholarly journals Design Of Array and Circular Polarization Microstrip Antenna For LTE Communication

2018 ◽  
Vol 218 ◽  
pp. 03006 ◽  
Author(s):  
Syah Alam ◽  
Eddy Wijanto ◽  
Budi Harsono ◽  
Fidelia Samandatu ◽  
Markus Upa ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Single Element ◽  
Substrate Thickness ◽  
Rectangular Patch ◽  
Working Frequency ◽  
Tan Δ

This paper proposes a high gain microstrip antenna with circular polarization for LTE applications at a working frequency of 2300 MHz. Gain of antenna is optimized by using an array method with 4 elements arranged in plannar using feed line of 50 Ohm, 100 Ohm and 70.7 Ohm. The proposed antenna designed using FR-4 substrate with (ɛr) = 4.3, substrate thickness (h) of 1.6 mm and loss tangent (tan δ) of 0.0265. Gain of antenna can be optimized by increasing the number of elements in the array of the antenna. Circular polarization can be obtained by cutting the edge of a rectangular patch antenna with an angle of 45° . From the simulation results obtained reflection coefficient value of -20.02 dB and VSWR of 1.22 at the working frequency of 2300 MHz. The gain of proposed microstrip antenna is 10.56 dB with an impedance bandwidth value of 714 MHz (1925 - 2639 MHz). The proposed antenna obtained a circular polarization with axial ratio of 1.745 dB at working frequency of 2300 MHz. Array method with four elements increased the gain of antena until 45.07% compared to the single element antenna.

scholarly journals Multi-Resonating UWB Printed Monopole Antenna

2019 ◽  
Vol 8 (2S11) ◽  
pp. 964-967
Keyword(s):  
Impedance Bandwidth ◽  
Uwb Antenna ◽  
Annular Ring ◽  
Compact Antenna ◽  
Large Bandwidth ◽  
Directional Radiation ◽  
Low Profile ◽  
Printed Monopole Antenna ◽  
Printed Monopole ◽  
Better Than

The multi-resonating, Annular Ring with Diamond Patch UWB Antenna has been presented, that produces large bandwidth. This configuration shows the bandwidth for VSWR = 2, or for corresponding S11 of 1.4GHz - 11 GHz, which includes UWB. This proposed configuration shows, approximately, Omni-directional radiation pattern on azimuthal plane for the entire range of frequency band. The measured and simulated results are shown; they promise for agreeable similarity. The impedance bandwidth ratio for presented antenna is achieved better than 7.85: 1 for S11< -9.6 dB. This antenna combines two resonators, i.e. annular ring and diamond shaped patch, within FR4 substrate of dimension 80mm x 80mm. This low profile compact antenna can be very useful for many embedded systems.

Annular ring microstrip patch antenna with finite ground plane for ultra-wideband applications

2014 ◽  
Vol 7 (2) ◽  
pp. 179-184 ◽  
Author(s):  
Sanyog Rawat ◽  
Kamalesh Kumar Sharma
Keyword(s):  
Microstrip Antenna ◽  
Simple Structure ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Ground Structure ◽  
Resonant Frequencies ◽  
Annular Ring ◽  
Low Profile ◽  
Key Factor

A design of annular ring microstrip antenna with finite ground structure is proposed in this paper. The proposed geometry offers impedance bandwidth of 2.362 GHz and has stable radiation patterns for all resonant frequencies in the operational band. It is also found that shape and dimension of the finite ground plane is a key factor in improving the bandwidth of the proposed geometry. The geometry is low profile and has simple structure, therefore can be used for lower band of ultra-wideband applications.

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.

High gain low profile wideband dual-layered substrate microstrip antenna based on multiple parasitic elements

2017 ◽  
Vol 10 (4) ◽  
pp. 453-459
Author(s):  
Haixiong Li ◽  
Bozhang Lan ◽  
Jun Ding ◽  
Chenjiang Guo
Keyword(s):  
Reflection Coefficient ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Low Profile ◽  
Layered Substrate ◽  
Measured Impedance ◽  
Peak Gain

In this paper, a high gain broadband low profile microstrip antenna with the dual-layered substrate and four parasitic metal elements is presented. The proposed microstrip antenna is mainly composed of four parts: four circular parasitic metal patches with dual arced breaches, a rectangular metal patch sandwiched between substrates, a square ground plane, and two-square substrates. The circular parasitic elements are the main radiation structure and determine the characteristics of the proposed antenna are closely related to the parasitic elements. The proposed antenna has been fabricated for experimental measurement. The reflection coefficient, radiation pattern, radiation efficiency, and gain have been studied in detail. The simulated and measured impedance bandwidth is 27.0% (3.30–4.33 GHz), the maximum realized peak gain reaches up to 6.52 dBi at the frequency of 3.65 GHz. The radiation pattern has a single peak which is perpendicular to the surface of the substrate. The proposed antenna is suitable to be applied in the 5G mobile or WiMAX wireless communication. Dual antenna with a pair of parasitic elements has been investigated numerically to explain the principle of the proposed antenna.

scholarly journals A Low Profile Dual-Band High Gain Directional Antenna for Anti-Interference WLAN Station Applications

2021 ◽  
Vol 11 (5) ◽  
pp. 2007
Author(s):  
Yuqing Dou ◽  
Guiting Dong ◽  
Jiafu Lin ◽  
Qibo Cai ◽  
Gui Liu
Keyword(s):  
Frequency Band ◽  
Local Area Network ◽  
Ground Plane ◽  
Directional Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Directional Radiation ◽  
Dual Band Antenna ◽  
Low Profile

This paper presents a low-profile dual-band antenna with directional radiation characteristics for wireless local area network (WLAN) applications. The proposed directional antenna is composed of a coupling microstrip line, two F-shaped strips, two rectangular strips, and a defected ground plane. The measured impedance bandwidth of the proposed antenna is 180 MHz (2.33–2.51 GHz) and 830 MHz (5.09–5.92 GHz), which can cover Institute of Electrical and Electronic Engineers (IEEE) 802.11 a/b/g frequency bands. The dual-band antenna exhibits a desirable directional radiation patterns in the vertical and horizontal planes with the peak gain of 6.55 dBi in the lower frequency band and 8.1 dBi in the higher frequency band. The measured antenna efficiency is 70% at 2.4 GHz and 84.5% at 5.5 GHz. The proposed dual-band WLAN station antenna is designed on a FR4 substrate with overall dimensions of 69 mm × 50 mm × 1.6 mm.

Wideband and compact slot loaded annular ring microstrip antenna using L-probe proximity-feed for wireless communications

2015 ◽  
Vol 8 (7) ◽  
pp. 1085-1093 ◽  
Author(s):  
Anil Kumar Singh ◽  
Ravi Kumar Gangwar ◽  
Binod K. Kanaujia
Keyword(s):  
Microstrip Antenna ◽  
Impedance Bandwidth ◽  
Theory Approach ◽  
Cavity Model ◽  
Modal Expansion ◽  
Annular Ring ◽  
Ansoft Hfss ◽  
Thick Substrate ◽  
Theoretical Results ◽  
Good Agreement

A wideband orthogonally slot cut annular ring microstrip antenna fed by L-shaped probe is investigated using modal expansion cavity model and circuit theory approach. Simulation of the proposed antenna is performed using Ansoft HFSS and simulated results are compared with the measured and theoretical results. The impedance bandwidth of about 37.46% is observed at resonant frequency 3.15 GHz. The proposed antenna realizes an improvement in bandwidth of 13.46% and miniaturization in physical dimension about 10% from earlier reported structures. An improvement in bandwidth and miniaturization is due to thick substrate, L-probe feed, and orthogonally loaded slots. The measured results of fabricated antennas are in good agreement with simulated and theoretical results.

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