A method to improve radiation efficiency by using a slot on a ground plane

2011 ◽  
Vol 53 (12) ◽  
pp. 3001-3003
Author(s):  
Seung-Jun Lee ◽  
Jae-Min Seo ◽  
Young-Sik Kim
Keyword(s):  
Ground Plane ◽  
Radiation Efficiency

scholarly journals Bandwidth-Enhanced Low-Profile Antenna with Parasitic Patches

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Son Xuat Ta ◽  
Kam Eucharist Kedze ◽  
Dao Ngoc Chien ◽  
Ikmo Park
Keyword(s):  
Ground Plane ◽  
Axial Ratio ◽  
Radiation Efficiency ◽  
Electric Conductor ◽  
Physical Size ◽  
Bandwidth Enhancement ◽  
Antenna Performance ◽  
Low Profile ◽  
Linearly Polarized ◽  
The Cost

This paper presents low-profile broadband antennas, which are composed of four parasitic patches placed between planar radiators and a perfect electric conductor ground plane. Two types of planar radiators, a conventional dipole and a crossed dipole, are employed to produce linearly polarized (LP) and circularly polarized (CP) radiations, respectively. The radiator and parasitic patches are realized on thin substrates to lower the cost. Owing to the presence of parasitic patches, the antenna performance improves in terms of profile reduction, resonant frequency decrease, and bandwidth enhancement. These improvements are discussed and confirmed computationally and experimentally. The LP design with the overall dimensions of 120 mm × 120 mm × 16.3 mm (0.64λ0 × 0.64λ0 × 0.087λ0 at 1.6 GHz) has a |S11| < −10 dB bandwidth of 1.465–1.740 GHz (17.2%), a broadside gain of 8.5–8.8 dBi, and a radiation efficiency > 96%. The CP design, which has the same physical size as the LP case, has a |S11| < −10 dB bandwidth of 1.388–1.754 GHz (23.3%), a 3 dB AR (axial ratio) bandwidth of 1.450–1.685 GHz (15.0%), a right-hand CP broadside gain of 7.8–8.7 dBic, and a radiation efficiency > 90%.

scholarly journals Design of Half Circular Disc Printed Monopole Antenna for Ultra Wide Band and Super Wide Band Applications

2020 ◽  
Author(s):  
Abdul Wajid ◽  
Muhammad Irshad Khan ◽  
Muhammad Anab ◽  
Muhammad Irfan Khattak
Keyword(s):  
Local Area Network ◽  
Dielectric Material ◽  
Ground Plane ◽  
Wide Band ◽  
Monopole Antenna ◽  
Radiation Efficiency ◽  
Circular Disc ◽  
Area Network ◽  
Printed Monopole Antenna ◽  
Printed Monopole

In this paper, a half-circular disc PMA (Printed Monopole Antenna) for SWB (Super Wide Band) applications is presented. The dimensions of the substrate is 40x40x1.7mm. The antenna is printed on Rogers RT5880 dielectric material. The antenna VSWR (Voltage Standing Wave Ratio) has less than 2 between 2.7 and 50 GHz. The antenna S11 has less than -10 between 2.7 and 50GHz. The antenna has a maximum gain of 12.4dBi. The BW (Bandwidth) of the proposed antenna is about 47.3 GHz. The antenna covered the WiMAX ((Worldwide Interoperability for Microwave Access), WLAN (Wireless Local Area Network), X band, Ka band, Ku band, 4G band, and the band of 5G (Fifth Generation) at the same time with nice gain and radiation efficiency. The radiator of the proposed antenna designs from a half-circular disc, rectangle, and triangle. The antenna has a partial ground plane. Three slots are etched in the ground plane for better impedance matching, two are circular slots and one is the rectangular slot. The antenna design is simulated in CST microwave studio 2016. The antenna has good radiation efficiency, other parameters such as VSWR S11, gain, and radiation pattern are discussed in detail.

Radiation efficiency improvement for dual-mode mobile phone using a slot on a ground plane

2011 ◽  
Vol 47 (19) ◽  
pp. 1063 ◽  
Author(s):  
S.-J. Lee ◽  
J.-M. Seo ◽  
C.-W. Park ◽  
Y.-S. Kim
Keyword(s):  
Mobile Phone ◽  
Ground Plane ◽  
Radiation Efficiency ◽  
Efficiency Improvement ◽  
Dual Mode

scholarly journals Design of Dual Notch UWBMIMO Antenna with Defected Ground Structure.

2019 ◽  
Vol 9 (2S3) ◽  
pp. 318-322
Keyword(s):  
Dielectric Constant ◽  
Frequency Band ◽  
Ground Plane ◽  
Radiation Efficiency ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Maximum Gain ◽  
Notch Band

In this paper A dual band notched MIMO antennais designed with defected ground structure as ground plane and its characteristics are analyzed. The antenna covers UWB frequency ranging from 3.1-10.6 GHz with single notch band characteristics with maximum gain of 3.7 dB. The antenna provides radiation efficiency of 94% with front to back to ratio of 64%. The simulated studied is carried for many frequency band applications. The designed antenna shows patterns similar to that of a the dipole. The substrate used to design this antenna is FR4 withdimensions of 26mm x40mmx1.6mm and dielectric constant of 4.4.The notch bands are at WLAN and WiMax frequencies.

scholarly journals A Compact Disc Shaped Microstrip Patch Antenna Using Inset Fed at 5GHz for Satellite Communications

2021 ◽  
Author(s):  
A. Pon Bharathi ◽  
Allan J Wilson ◽  
S. Arun ◽  
V. Ramanathan
Keyword(s):  
Patch Antenna ◽  
Focal Point ◽  
Ground Plane ◽  
Satellite Communications ◽  
Microstrip Patch Antenna ◽  
Radiation Efficiency ◽  
Microstrip Patch ◽  
Rectangular Microstrip Patch Antenna ◽  
5 Ghz ◽  
Defected Ground Plane

This examination work is focused around planning and simulating another kind of inset feed Disc Shaped Microstrip Patch Antenna (DSMPA) with Inset feed and Defected ground plane (DGP). By presenting a round space at the focal point of the ground plane, improved attributes of Microstrip patch antenna can be accomplished. The proposed Disc Shaped Microstrip patch antenna is reverberating at 5 GHz. Simulation has been finished by utilizing reenactment programming HFSS version15. From recreation results, it discovers that our examined Disc Shaped Microstrip patch antenna yields better return loss of - 25.1 dB & VSWR estimation of 0.96 dB. The examined DSMPA is yielding a higher radiation efficiency of 77.20 %. The minimized size and higher radiation efficiency contrasted with rectangular Microstrip patch antenna makes it all the more generally helpful for satellite communications.

scholarly journals MTM- and SIW-Inspired Bowtie Antenna Loaded with AMC for 5G mm-Wave Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Ayman A. Althuwayb
Keyword(s):  
Millimeter Wave ◽  
Ground Plane ◽  
Cost Effective ◽  
High Gain ◽  
Small Dimension ◽  
Radiation Efficiency ◽  
Fractional Bandwidth ◽  
Bowtie Antenna ◽  
Compact Dimension ◽  
Loaded Antenna

This paper investigates a feasible configuration of slotted bowtie antenna based on MTM and SIW properties for 5G millimeter-wave applications. To realize the proposed slotted bowtie antenna in a compact dimension with high performances, the MTM and SIW concepts are implemented by applying the trapezoidal slots on the top surface of the antenna and metallic via holes through the substrate layer connecting the top surface to the ground plane. The antenna has been fed with a simple microstip-line which is connected to a waveguide-port. It is shown that the slotted bowtie antenna with a small dimension of 30   ×   16   ×   0.8 mm3 operates over a measured wideband of 32–34.6 GHz with the fractional bandwidth, average gain, and radiation efficiency of 7.8%, 3.2 dBi, and 50%, respectively. To improve the antenna's performance, the artificial magnetic conductor (AMC) properties have been employed on the ground plane by loading vertical and linear slots with various lengths. The AMC slots are aligned under the trapezoidal slots on the top surface to transfer the maximum electromagnetic signals to them for optimum radiation. The proposed method enlarges the antenna’s effective aperture area, keeping constant its physical dimensions. The proposed AMC-loaded antenna covers wider frequency range of 30–37 GHz in measurement, which corresponds to 21% fractional bandwidth. The average experimental gain and radiation efficiency have been increased to 5.5 dBi and 66.5%, respectively, which illustrate the effectiveness of the proposed AMC-loaded antenna. The results confirm that the proposed slotted bowtie antenna with advantages of compact dimension, wide bandwidth, high gain and efficiency, low profile, being cost-effective, simple design, and easy fabrication process, which makes it applicable for mass production, can be a good candidate for 5G millimeter-wave applications.

scholarly journals CPWG Fed with Octagonal Patch Antenna

2021 ◽  
Vol 9 (VI) ◽  
pp. 2086-2094
Author(s):  
Dr. K. RameshBabu
Keyword(s):  
Patch Antenna ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Dielectric Material ◽  
Ground Plane ◽  
Local Area ◽  
Radiation Efficiency ◽  
Design Parameters ◽  
Area Network ◽  
Patch Antennas

A Co planner Wave Guide (CPWG) fed with octagonal patch antenna is modified from their respective rectangular patch are presented for WLAN application. The dielectric material applied in the design process for both co planar and micro strip patch antenna is FR4 Epoxy Glass, which has relative permittivity of 4.4 and substrate height 1.6mm. Antenna parameters used to check the performance. A comparison is made between the octagonal co-planar antenna and octagonal micro strip antenna available. Ansys HFSS is used for antenna design and analysis. Both designed antennas are suitable for wireless local area network application and the design parameters of the antenna are optimized to resonate at 3GHz frequencies for WLAN applications. It has been found that octagonal micro strip patch antennas have lower return loss and are more directive than co planar patch antenna. High directivity of octagonal micro strip antenna is due to the presence of ground plane under the substrate of antenna. The results obtained by simulations have also shown that octagonal co planar patch antennas have high radiation efficiency (a measure of the power radiated through the antenna as an electromagnetic wave to the power fed to the antenna terminals) and which implies a wider bandwidth as compared to an octagonal micro strip patch antennas. The radiation efficiency obtained for micro strip patch antenna is 24% and that for co planar patch antenna is 67%, the directivity for micro strip patch antenna is 3.75 dB and that for a co-planar patch antenna is 3.25 dB.

scholarly journals Coplanar Waveguide-Fed Bidirectional Same-Sense Circularly Polarized Metasurface-Based Antenna

2021 ◽  
Vol 21 (3) ◽  
pp. 210-217
Author(s):  
Cho Hilary Scott Nkimbeng ◽  
Heesu Wang ◽  
Ikmo Park
Keyword(s):  
Reflection Coefficient ◽  
Coplanar Waveguide ◽  
Ground Plane ◽  
Axial Ratio ◽  
Radiation Efficiency ◽  
Impedance Bandwidth ◽  
Antenna Gain ◽  
Circularly Polarized ◽  
Feed Line

This paper presents the design of a bidirectional same-sense circularly polarized (CP) antenna that uses metasurfaces. The antenna consists of two metasurfaces, each comprising an array of 2 × 4 corner truncated patches placed back-to-back on the top and bottom of the antenna. In addition, a ground plane with an etched slot is sandwiched between the substrates at the front and back, and the feed line is a 50 Ω coplanar waveguide. The antenna radiates same-sense right-handed CP waves in both the front and back directions and has overall dimensions of 48 mm × 24 mm × 3.048 mm (0.91λo × 0.45λo × 0.05λo at 5.7 GHz). The measured reflection coefficient for |S11| < -10 dB yields an impedance bandwidth of 5.21–6.26 GHz (18.4%) and an axial ratio (AR) bandwidth of 5.36–6 GHz (11.2%) for both front and back directions. The antenna gain is 3–5.29 dBic for both directions and has a radiation efficiency of >96% within its AR bandwidth.

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