scholarly journals Ultra-Wideband Metamaterial-Loaded Microstrip Array Antennas using Fibonacci & Fractal Geometric Patterns, Design and Modelling

2020 ◽  
Vol 4 (5) ◽  
Author(s):  
Besharat Rezaei Shookooh ◽  
Alireza Monajati ◽  
Hamid Khodabakhshi
Keyword(s):  
Equivalent Circuit Model ◽  
Array Antenna ◽  
Ultra Wideband ◽  
Equivalent Model ◽  
Impedance Bandwidth ◽  
Coupling Mechanism ◽  
Geometric Patterns ◽  
Array Antennas ◽  
Microstrip Array ◽  
Microstrip Array Antenna

In this study; theory, design and modeling of a new topology of ultra-wideband (UWB) metamaterial (MTM) loaded microstrip array antenna using Fibonacci & fractal geometric patterns are analyzed. This antenna is made basically from many monopole elements which are loaded by complementary metamaterial transmission line (CMTL) unit cells. The distributed CMTL element, contains a Koch-shaped expanded complementary single split ring resonator (CSRR) pair. At first step, the UWB microstrip array antenna designed with two CMTL-loaded monopole element. So, using an iterative method based on the Fibonacci and fractal geometry patterns, the array antenna is expanded. As the order of iteration increases, the impedance bandwidth of the proposed array antennas improve more, and the radar cross section (RCS) decreases. the impedance bandwidth of the proposed third-order Fibonacci and fractal CMTL-loaded array antennas are 250 MHz and 539 MHz more than the two-element CMTL-loaded array antenna, respectively. Finally, this paper presents an improved method to extract the parameters of an equivalent circuit model of the proposed MTM-loaded array antenna. Verification of the equivalent model have been validated utilizing ADS software. The obtained model, in addition to numerically efficient in comparison with the full wave analysis utilizing the moment method, gives a good physical insight to the mutual coupling mechanism of the array antenna.

scholarly journals Theory, Design, and Implementation of a New Family of Ultra-Wideband Metamaterial Microstrip Array Antennas Based on Fractal and Fibonacci Geometric Patterns

2020 ◽  
Vol 20 (1) ◽  
pp. 53-63
Author(s):  
Besharat Rezaei Shookooh ◽  
Alireza Monajati ◽  
Hamid Khodabakhshi
Keyword(s):  
Array Antenna ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Geometric Patterns ◽  
The Third ◽  
New Family ◽  
Area Reduction ◽  
Array Antennas ◽  
Microstrip Array ◽  
Microstrip Array Antenna

The theory and design of a new family of ultra-wideband (UWB) metamaterial (MTM) microstrip array antennas based on fractal and Fibonacci geometric patterns are investigated. First, the UWB microstrip array antenna is presented with two radiating MTM elements. Then, using fractal and Fibonacci geometric patterns, the array antenna is expanded. Improvements in the antenna parameters is achieved by repeating the second and third iterations of the fractal and Fibonacci patterns. As the order of iteration of the fractal and Fibonacci geometric patterns increases, the impedance bandwidth of the MTM microstrip array antenna increases, and its radar cross-section (RCS) decreases. The impedance bandwidth of the array antenna with two MTM elements is 3.37–9.2 GHz, while the bandwidth of the third-iteration Fibonacci and fractal MTM array antennas are 3.5–10.1 GHz and 3.55–10.34 GHz, respectively. Furthermore, the proposed array antennas exhibit lower RCS due to metal area reduction, with respect to the array antenna with two MTM elements.

Design and Analysis of a RFID Reader Microstrip Array antenna for IoT Applications in Smart Cities

2022 ◽  
Vol 17 (5) ◽  
pp. 0-0
Keyword(s):  
Smart Cities ◽  
Array Antenna ◽  
The Internet ◽  
Substrate Thickness ◽  
Iot Applications ◽  
Rfid Reader ◽  
Array Antennas ◽  
Microstrip Array ◽  
The Internet Of Things ◽  
Microstrip Array Antenna

This paper presents the design of 2*1 and 4*1 RFID reader microstrip array antenna at 2.4GHz for the Internet of things (IoT) networks which are Zigbee, Bluetooth and WIFI. The proposed antenna is composed of identical circular shapes radiating patches printed in FR4 substrate. The dielectric constant εr and substrate thickness h are 4.4 and 1.6mm, respectively. The 2*1 and 4*1 array antennas present a gain improvement of 27.3% and 61.9%, respectively. The single,2*1 and 4*1 array antennas were performed with CADFEKO.

scholarly journals Reduction of Mutual Coupling and Return Loss in Microstrip Array Antennas Using Concave Rectangular Patches

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Shahram Mohanna ◽  
Ali Farahbakhsh ◽  
Saeed Tavakoli ◽  
Nasser Ghassemi
Keyword(s):  
Mutual Coupling ◽  
Return Loss ◽  
Array Antenna ◽  
Effective Solution ◽  
Rectangular Array ◽  
Rectangular Patch ◽  
Array Antennas ◽  
Microstrip Array ◽  
Patch Length ◽  
Microstrip Array Antenna

An effective solution to reduce both the mutual coupling and return loss of a microstrip array antenna consisting of rectangular patches is proposed. The patch is made concave in both horizontal and vertical sides. Applying the proposed structure to a microstrip array antenna having two elements, the effects of patch concavity on the mutual coupling and return loss are simulated and studied. To obtain a concave rectangular patch array antenna having low amounts of mutual coupling and return loss, the patch length and width as well as the amounts of concavities are optimized using an enhanced genetic algorithm. To verify the simulation results, then, the optimal array antenna is fabricated. The simulation and experimental results confirm that the optimal concave rectangular array antenna has low amounts of mutual coupling and return loss.

scholarly journals Design and Analysis of a RFID Reader Microstrip Array Antenna for IoT Applications in Smart Cities

2022 ◽  
Vol 17 (5) ◽  
pp. 1-11
Author(s):  
Omaima Benkhadda ◽  
Mohamed Saih ◽  
kebir Chaji ◽  
Abdelati Reha
Keyword(s):  
Smart Cities ◽  
Array Antenna ◽  
The Internet ◽  
Substrate Thickness ◽  
Iot Applications ◽  
Rfid Reader ◽  
Array Antennas ◽  
Microstrip Array ◽  
The Internet Of Things ◽  
Microstrip Array Antenna

This paper presents the design of 2*1 and 4*1 RFID reader microstrip array antenna at 2.4GHz for the Internet of things (IoT) networks which are Zigbee, Bluetooth and WIFI. The proposed antenna is composed of identical circular shapes radiating patches printed in FR4 substrate. The dielectric constant εr and substrate thickness h are 4.4 and 1.6mm, respectively. The 2*1 and 4*1 array antennas present a gain improvement of 27.3% and 61.9%, respectively. The single,2*1 and 4*1 array antennas were performed with CADFEKO.

scholarly journals Ultra-wideband Microstrip Array Antenna for 5G Millimeter-wave Applications

2020 ◽  
pp. 198-204 ◽  
Author(s):  
Efri Sandi ◽  
◽  
Rusmono Rusmono ◽  
Aodah Diamah ◽  
Karisma Vinda
Keyword(s):  
Millimeter Wave ◽  
Array Antenna ◽  
Ultra Wideband ◽  
Microstrip Array ◽  
Microstrip Array Antenna

scholarly journals Microstrip array antenna with inset-fed for WLAN application

2020 ◽  
Vol 17 (1) ◽  
pp. 340
Author(s):  
Norfishah Ab Wahab ◽  
W. Nor Syafizan W. Muhamad ◽  
Zuhani Ismail Khan ◽  
Suzi Seroja Sarnin
Keyword(s):  
Wireless Communication ◽  
Return Loss ◽  
Array Antenna ◽  
Patch Antennas ◽  
Array Antennas ◽  
Compact Size ◽  
Corporate Network ◽  
Microstrip Array ◽  
Good Agreement ◽  
Microstrip Array Antenna

<p>This paper proposed three designs of microstrip array patch antennas, to resonate at 2.4 GHz. The purpose of the study is to achieve size reduction with acceptable performance for wireless communication system applications. Based on the array concept, the array antennas are arranged using corporate network technique. It is found that the simulated 4x3 patch array antenna achieved the compact size with dimension reduced up to 26% compared to 4x1 and 4x2 array patch antennas. In terms of return loss, the antenna attenuated more than 19 dB. The 4x3 patch array antenna is fabricated and measured using RO4350 microstrip substrate to validate the concept. The responses are found in good agreement between simulation and measurement.</p>

2x2 Rectangular-Slot Microstrip Array Antenna for WLAN Applications

2014 ◽  
Vol 619 ◽  
pp. 162-165
Author(s):  
Obeng Kwakye Kingsford Sarkodie
Keyword(s):  
Middle Layer ◽  
Bottom Layer ◽  
Basic Structure ◽  
Array Antenna ◽  
Impedance Bandwidth ◽  
Rectangular Slot ◽  
Radiating Element ◽  
Microstrip Array ◽  
Quality Factor Q ◽  
Microstrip Array Antenna

This paper presents the design of a 2 x 2 microstrip array antenna suitable for wireless applications. Its basic structure is a microstrip comprising of three layers of which a 2x2 patches are etched on the top layer to act as the radiating element. The middle layer is a metal ground with rectangular slots and the bottom layer consists of a microstrip feedline. A larger bandwidth and the desired resonant frequency are achieved because of a reduction in the quality factor (Q) of the patch resonator, which is due to less energy being stored beneath the patch due to the rectangular arrangement of the slots. The characterization results of return loss, gain, and radiation pattern are presented consecutively. From the results, the simulated impedance bandwidth defined for S11<-10dB reaches 1850MHz (4.69-6.54GHz) representing 16.47%.

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