scholarly journals Far field focusing for a microwave patch antenna with composite substrate

2018 ◽  
Vol 8 ◽  
pp. 971-976 ◽  
Author(s):  
Jian Wan ◽  
Oleg Rybin ◽  
Sergey Shulga
Keyword(s):  
Patch Antenna ◽  
Far Field ◽  
Composite Substrate

DESIGN AND ANALYSIS OF META-MATERIAL BASED WLAN ANTENNA

2016 ◽  
Vol 78 (4-3) ◽  
Author(s):  
Muhammad Aamir Afridi ◽  
Sadiq Ullah
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Field Performance ◽  
Far Field ◽  
Electromagnetic Bandgap ◽  
Conventional Counterpart

In this paper, a 2.42 GHz micro-strip patch antenna is designed and analyzed using a conventional and a metamaterial (artificial) based Electromagnetic Bandgap (EBG) ground planes. The directivity, return loss and VSWR of the conventional 2.42 GHz patch antenna were found to be 5.23dB, -13.2dB, and 1.5 respectively. The proposed antenna then being mounted on a Mushroom-type EBG structures (artificial ground plane) produced better far-field performance as compared to conventional counterpart i.e. the return loss, directivity and VSWR were improved by 80.3%, 58.5% and 24.6%. The WLAN antenna was designed and tested on a miniaturized slotted EBG structure. The slotted EBG was 11.4 % compact as compared to the mushroom structure. The directivity, return loss and VSWR of the antenna using the slotted EBG are improved by be 51%, 31.8%, 15.4% respectively as compared to the patch conventional WLAN patch antenna. The antenna can be used for WLAN applications.

scholarly journals A concurrent 915/2440 MHz RF energy harvester

2016 ◽  
Vol 8 (3) ◽  
pp. 405-413 ◽  
Author(s):  
Ludvine Fadel ◽  
Laurent Oyhenart ◽  
Romain Bergès ◽  
Valérie Vigneras ◽  
Thierry Taris
Keyword(s):  
Patch Antenna ◽  
Power Efficiency ◽  
Energy Harvester ◽  
Dipole Antenna ◽  
Dual Band ◽  
Far Field ◽  
Dc Voltage ◽  
Received Power ◽  
Rf Energy ◽  
Rf Energy Harvester

This paper presents the development of two dual-band radio-frequency (RF) harvesters optimized to convert far-field RF energy to DC voltage at very low received power. The first one is based on a patch antenna and the second on a dipole antenna. They are both implemented on a standard FR4 substrate with commercially off-the-shelf devices. The two RF harvesters provide a rectified voltage of 1 V for a combined power, respectively, of −19.5 dBm at 915 MHz, −25 dBm at 2.44 GHz, of −20 dBm at 915 MHz, and −15 dBm at 2.44 GHz. The remote powering of a clock consuming 1 V/5 µA is demonstrated, and the rectenna yields a power efficiency of 12%.

Gain Improvement of Microstrip Patch Antenna Using CLS Split Ring Resonator Metamaterial

Frequenz ◽  
2015 ◽  
Vol 69 (3-4) ◽  
Author(s):  
Pankaj Rameshchandra Katiyar ◽  
Wan Nor Liza Binti Wan Mahadi
Keyword(s):  
Patch Antenna ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Microstrip Patch Antenna ◽  
Electromagnetic Energy ◽  
Anechoic Chamber ◽  
Far Field ◽  
Split Ring ◽  
Beam Focusing ◽  
Microstrip Patch

AbstractMetamaterials are artificial materials with negative permittivity and permeability. Metamaterials due to their unique negative parameter are capable of focusing the electromagnetic energy incident upon them. This focusing of electromagnetic energy is used to increase the gain of microstrip patch antenna. A capacitive loaded strip (CLS)-loaded split ring resonator is used to form a multilayer array of metamaterial and used in front of microstrip patch antenna to enhance far-field gain of antenna. An accurate simulation model is created and analyzed using CST. The simulated model is then fabricated and measured in fully anechoic chamber for validation. The far-field gain of regular patch antenna with and without metamaterial is measured in anechoic chamber. The increase in gain by 4 dB is measured at 95 mm from antenna. The beam focusing property is also evident from 3 dB beamwidth of antenna which is reduced to 42.01°.

A reconfigurable patch antenna printed on YIG-epoxy composite substrate

2016 ◽  
Author(s):  
E. Andreou ◽  
T. Zervos ◽  
E. Varouti ◽  
A.A. Alexandridis ◽  
F. Lazarakis ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Epoxy Composite ◽  
Composite Substrate

scholarly journals Design of Horse Shoe Patch antenna for wireless Applications

2018 ◽  
Vol 3 (1) ◽  
pp. 14-16
Author(s):  
N. Jayanti ◽  
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Substrate Material ◽  
Antenna Design ◽  
Substrate Thickness ◽  
Far Field ◽  
Wireless Applications ◽  
Substrate Layer ◽  
Cst Microwave Studio

This paper illustrates the design and analysis of a horseshoe patch antenna and compares the results of antenna for Duroid (ɛr = 2.2), Rogers RO4350 (ɛr = 3.66) and FR-4 (ɛr = 4.3) as substrate material and another comparison is between proposed antenna with and without an upper layer of substrate (duroid). The substrate thickness taken for this antenna is 1.57mm and for the substrate layer above the patch, thickness is 0.2mm. Comparison of these different structures has been done on the basis of return loss, VSWR, efficiency, and far-field. In these structures, a horse shoe-shaped patch is placed above the substrate. The proposed antenna has been designed and simulated using CST microwave studio 2014. The proposed antenna design can be used for WLAN, WiMAX, and IMT applications.

A novel design of Scarecrow-shaped patch antenna for broadband applications

2017 ◽  
Vol 10 (3) ◽  
pp. 351-359 ◽  
Author(s):  
Bhupendra Kumar Shukla ◽  
Nitesh Kashyap ◽  
Rajendra Kumar Baghel
Keyword(s):  
Patch Antenna ◽  
Microstrip Line ◽  
Ground Plane ◽  
Field Pattern ◽  
Impedance Bandwidth ◽  
Far Field ◽  
Tan Δ ◽  
Coaxial Feed ◽  
Far Field Pattern ◽  
Novel Design

A novel Scarecrow-shaped patch antenna has been presented for broadband applications. The proposed antenna composed of an elliptical shape radiating patch, partial ground plane, and 50 Ω microstrip line which is Boolean added with the radiating patch. To achieve wide impedance bandwidth, an elliptical notch and two rectangular-shaped parasitic slots have incorporated on the ground plane. This antenna has printed on FR-4 substrate (tan(δ) = 0.02, εr = 4.3) with the thickness of 1.6 mm. It is energized by coaxial feed which is connected with a microstrip line through via. The proposed configuration has examined numerically with the help of CST Microwave Studio and experimentally also. The broadband property of this antenna has been achieved by adjusting the dimensions of an elliptical notch. The antenna exhibits the bandwidth of 116.32% from 1.23 to 4.65 GHz for S11 <−10 dB. Current distribution and far-field pattern at resonating frequencies 1.29, 1.77, 2.28, 2.94, and 3.72 GHz have been studied. It has been found that the far-field pattern is distorted at frequency 3.72 GHz due to higher order modes. Effect of parameters on frequency response of the antenna has also been investigated to know the behavior of the antenna.

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