scholarly journals A Systematic Analysis and Design of a High Gain Microstrip Antenna based on a Single EBG Layer

2018 ◽  
pp. 22-30
Author(s):  
Yahiea Al Naiemy ◽  
Taha Elwi ◽  
Lajos Nagy ◽  
Thomas Zwick
Keyword(s):  
Microstrip Antenna ◽  
Single Layer ◽  
High Gain ◽  
Systematic Analysis ◽  
Analysis And Design ◽  
Gain Enhancement ◽  
Antenna Performance ◽  
Individual Unit ◽  
Planar Array ◽  
The Individual

In this paper, an Electromagnetic Band Gap (EBG) lens of a single layer is invented to improve the gain of a truncated slotted square patch antenna for the Wi-Fi applications. The proposed EBG lens is structured from 55 planar array. The individual unit cell is basically shaped as a couple of a split concave conductive patch. The proposed EBG struc- ture performance is tested numerically using Finite Integration Technique (FIT) formulations of CSTMWS and analytically using circuit theory. Then, the antenna performance in terms of |S11|, the boresight gain, and radiation patterns are reported and compared to the performance before introducing the EBG lens to identify the significant enhancements. The proposed EBG antenna is simulated numerically inside FIT formulations of CSTMWS time domain (TD) solver. A significant gain enhancement of 11.1 dBi at 2.45 GHz and a front to back ratio (F/B) about 22 dB are achieved after introducing the EBG lens. The antenna performance is validated using a frequency domain (FD) solver based CSTMWS formulations to obtain excellent agreements between the two invoked methods.

Circularly polarized microstrip antenna arrays with reduced mutual coupling using metamaterial

2015 ◽  
Vol 8 (8) ◽  
pp. 1253-1263 ◽  
Author(s):  
R. Hafezifard ◽  
Jalil Rashed-Mohassel ◽  
Mohammad Naser-Moghadasi ◽  
R. A. Sadeghzadeh
Keyword(s):  
Antenna Arrays ◽  
Microstrip Antenna ◽  
Mutual Coupling ◽  
Ground Plane ◽  
High Gain ◽  
Ring Resonators ◽  
Magnetic Characteristics ◽  
Circularly Polarized ◽  
Antenna Performance ◽  
Left Handed

A circularly polarized (CP) and high gain Microstrip antenna is designed in this paper using metamaterial concepts. The antenna, built on a metamaterial substrate, showed significant size reduction and less mutual coupling in an array compared with similar arrays on conventional substrates. Demonstrated to have left-handed magnetic characteristics, the methodology uses complementary split-ring resonators (SRRs) placed horizontally between the patch and the ground plane. In order to reduce mutual coupling in the array structure, hexagonal-SRRs are embedded between antenna elements. The procedure is shown to have great impact on the antenna performance specifically its bandwidth which is broadened from 400 MHz to 1.2 GHz for X-band and as well as its efficiency. The structure has also low loss and improved standing wave ratio and less mutual coupling. The results show that a reduction of 26.6 dB in mutual coupling is obtained between elements at the operation frequency of the array. Experimental data show a reasonably good agreement between simulation and measured results.

scholarly journals 2D Gain Enhancement Based on Single-Layer SIW Corrugated Technique with Slot Array Feeder

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Mingtuan Lin ◽  
Chenglong Lin
Keyword(s):  
Reflection Coefficient ◽  
Printed Circuit Board ◽  
Single Layer ◽  
High Gain ◽  
Circuit Board ◽  
Design Complexity ◽  
Printed Circuit ◽  
Gain Enhancement ◽  
High Gain Antenna ◽  
The Common

Novel slot-array-based SIW corrugated technique is demonstrated to achieve 2D gain enhancement, namely, sharpening the beamwidths in both E-plane and H-plane. Compared to other metallic corrugated methods to realize 2D gain enhancement, the proposed design, with SIW grooves to reduce the beamwidth in E-plane and slot array to increase the directivity in H-plane, has a lower profile, weight, and design complexity, which can be easily fabricated with the common printed circuit board (PCB) technique. A prototype is designed and fabricated, with measurement presenting a low reflection coefficient less than −10 dB from 26.4 GHz to 28.2 GHz and an enhanced gain up to 18 dB. Overall, our proposed technique will be beneficial for the design of high-gain antenna in 5G wireless terminals.

A Novel-Shaped Reduced Size FSS-Based Broadband High Gain Microstrip Patch Antenna for WiMAX/WLAN/ISM/X-Band Applications

2021 ◽  
pp. 2150290
Author(s):  
Kalyan Mondal
Keyword(s):  
Patch Antenna ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
High Gain ◽  
Microstrip Patch Antenna ◽  
Impedance Bandwidth ◽  
Antenna Structure ◽  
Microstrip Patch ◽  
Antenna Performance ◽  
Peak Gain

In this work, a broadband high gain frequency selective surface (FSS)-based microstrip patch antenna is proposed. The dimensions of the microstrip antenna and proposed FSS are [Formula: see text] and [Formula: see text]. A broadband high gain reference antenna has been selected to improve antenna performance. The reference antenna offers 1.2[Formula: see text]GHz bandwidth with 6.03[Formula: see text]dBi peak gain. Some modifications have been done on the patch and ground plane to enhance the bandwidth and gain. The impedance bandwidth of 7.70[Formula: see text]GHz (3.42–11.12[Formula: see text]GHz) with 4.9 dBi peak gain is achieved by the microstrip antenna without FSS. The antenna performance is improved by using FSS beneath the antenna structure. The maximum impedance bandwidth of 7.70[Formula: see text]GHz (3.32–11.02[Formula: see text]GHz) and peak gain of 8.6[Formula: see text]dBi are achieved by the proposed antenna with FSS. Maximum co- and cross-polarization differences are 21[Formula: see text]dB. The simulation and measurement have been done using Ansoft Designer software and vector network analyzer. The measured results are in good parity with the simulated one.

Gain enhancement of wideband circularly polarized antenna using FSS

2016 ◽  
Vol 9 (3) ◽  
pp. 697-703 ◽  
Author(s):  
Nagendra Kushwaha ◽  
Raj Kumar
Keyword(s):  
Coplanar Waveguide ◽  
Axial Ratio ◽  
Frequency Selective Surface ◽  
High Gain ◽  
Unit Element ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
Gain Enhancement ◽  
Antenna Performance ◽  
Measured Impedance

This paper presents a high gain, wideband circularly polarized (CP) antenna. High gain of the antenna is achieved by employing a frequency selective surface (FSS) as a reflector. The antenna is a coplanar waveguide-fed structure with a modified L-shaped radiating patch. The unit element of the FSS is formed by connecting two modified dipoles at an angle of 90°. The antenna with reflector has a measured impedance bandwidth of 74.3% (2.2–4.8 GHz) and a 3-dB axial ratio bandwidth (ARBW) of 62% (2.2–4.18 GHz). The maximum boresight gain of the proposed antenna with reflector is 7.1 dB at 3.4 GHz. The radiation patterns of the antenna with the FSS are also measured and compared with simulated patterns. The various aspects of effect of FSS on CP antenna performance are also discussed.

scholarly journals Some Recent Developments of Microstrip Antenna

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Yong Liu ◽  
Li-Ming Si ◽  
Meng Wei ◽  
Pixian Yan ◽  
Pengfei Yang ◽  
...  
Keyword(s):  
Microstrip Antenna ◽  
High Gain ◽  
Planar Antennas ◽  
Wave Regime ◽  
High Frequencies ◽  
The Past ◽  
Recent Developments ◽  
Advanced Machining ◽  
Points Of View ◽  
The Individual

Although the microstrip antenna has been extensively studied in the past few decades as one of the standard planar antennas, it still has a huge potential for further developments. The paper suggests three areas for further research based on our previous works on microstrip antenna elements and arrays. One is exploring the variety of microstrip antenna topologies to meet the desired requirement such as ultrawide band (UWB), high gain, miniaturization, circular polarization, multipolarized, and so on. Another is to apply microstrip antenna to form composite antenna which is more potent than the individual antenna. The last is growing towards highly integration of antenna/array and feeding network or operating at relatively high frequencies, like sub-millimeter wave or terahertz (THz) wave regime, by using the advanced machining techniques. To support our points of view, some examples of antennas developed in our group are presented and discussed.

A high gain wideband circularly polarized microstrip antenna

2020 ◽  
Vol 12 (7) ◽  
pp. 678-687
Author(s):  
Arun Kumar ◽  
Santanu Dwari ◽  
Ganga Prasad Pandey ◽  
Binod Kumar Kanaujia ◽  
Dinesh Kumar Singh
Keyword(s):  
Microstrip Antenna ◽  
Axial Ratio ◽  
High Gain ◽  
Split Ring Resonator ◽  
Impedance Bandwidth ◽  
Reflected Waves ◽  
Circularly Polarized ◽  
Gain Enhancement ◽  
Reflector Surface ◽  
Printed Monopole Antenna

AbstractIn this paper, a high gain wideband circularly polarized (CP) microstrip antenna is presented for broadband operation. The proposed structure comprised of a partially grounded printed monopole antenna loaded with a split ring resonator and a metallic reflector. By using the metallic reflector surface underneath the patch radiator results in the reflected waves in the same phase with main lobe radiation, thereby improving the gain and it also acts like a secondary radiator to generate wideband CP behavior in the proposed design. A gain enhancement of 4.3 dBi is achieved in the operating frequency band as compared with the design without a metallic reflector. The maximum gain achieved in the presented method is 8.6 dBic over the entire operating range. The proposed design shows a wideband behavior ranging from 4.30 to 9.10 GHz with the 10-dB impedance bandwidth of 71.64%. In addition, the proposed design yielded a broadside right hand CP radiation with a 3-dB axial ratio bandwidth of 33.88% from 4.98 to 7.01 GHz. The proposed antenna is fabricated and experimental results on reflection coefficient, gain, axial ratio, and radiation patterns concede well with simulation results.

Bulk Contributions Modulate the Sum-Frequency Generation Spectra of Interfacial Water on Model Sea-Spray Aerosols

2018 ◽  
Author(s):  
Sandeep K. Reddy ◽  
Raphael Thiraux ◽  
Bethany A. Wellen Rudd ◽  
Lu Lin ◽  
Tehseen Adel ◽  
...  
Keyword(s):  
Single Layer ◽  
Sum Frequency Generation ◽  
Second Order ◽  
Interfacial Structure ◽  
Sea Spray ◽  
Third Order ◽  
Systematic Analysis ◽  
Sum Frequency ◽  
Structure Of Water ◽  
Frequency Generation

Vibrational sum-frequency generation (vSFG) spectroscopy is used to determine the molecular structure of water at the interface of palmitic acid monolayers. Both measured and calculated spectra display speci c features due to third-order contributions to the vSFG response which are associated with nite interfacial electric potentials. We demonstrate that theoretical modeling enables to separate the third-order contributions, thus allowing for a systematic analysis of the strictly surface-sensitive, second-order component of the vSFG response. This study provides fundamental, molecular-level insights into the interfacial structure of water in a neutral surfactant system with relevance to single layer bio-membranes and environmentally relevant sea-spray aerosols. These results emphasize the key role that computer simulations can play in interpreting vSFG spectra and revealing microscopic details of water at complex interfaces, which can be difficult to extract from experiments due to the mixing of second-order, surface-sensitive and third-order, bulk-dependent contributions to the vSFG response.

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