Design of Dual Mode AVA with Enhanced Radiation Characteristics

2021 ◽  
Author(s):  
Sathishkumar N ◽  
Nandalal V ◽  
Rajesh Natarajan
Keyword(s):  
Dual Mode ◽  
Radiation Characteristics ◽  
Pin Diodes ◽  
Full Wave ◽  
Working Principle ◽  
Vivaldi Antenna ◽  
Peak Gain

Abstract Dual mode antipodal Vivaldi antenna (AVA) with narrowband to wideband switching is proposed in this work. The antenna has the footprint of 60 mm x 40 mm x 1.6 mm and FR-4 substrate used for fabrication. The antenna exhibits 8.3 GHz bandwidth in wideband mode with a peak gain of 6.9 dBi and 1.6 GHz bandwidth in narrowband mode with a peak gain of 7 dBi. The simulations are performed using CST full wave simulator and the results are compared with the reference antenna of the same dimensions. PIN diodes are implemented to achieve the frequency switching. The working principle of the antenna is explained through simulation and verified through measurements.

scholarly journals Miniaturized Antipodal Vivaldi Antenna with Improved Bandwidth Using Exponential Strip Arms

Electronics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 83
Author(s):  
Mohammad Mahdi Honari ◽  
Mohammad Saeid Ghaffarian ◽  
Rashid Mirzavand
Keyword(s):  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Lower Edge ◽  
Radiation Characteristics ◽  
Antenna Structure ◽  
Antenna Miniaturization ◽  
Vivaldi Antenna ◽  
Vivaldi Antennas ◽  
Peak Gain

In this paper, a miniaturized ultra-wideband antipodal tapered slot antenna with exponential strip arms is presented. Two exponential arms with designed equations are optimized to reduce the lower edge cut-off frequency of the impedance bandwidth from 1480 MHz to 720 MHz, resulting in antenna miniaturization by 51%. This approach also improves antenna bandwidth without compromising the radiation characteristics. The dimension of the proposed antenna structure including the feeding line and transition is 158 × 125 × 1 mm3. The results show that a peak gain more than 1 dBi is achieved all over the impedance bandwidth (0.72–17 GHz), which is an improvement to what have been reported for antipodal tapered slot and Vivaldi antennas with similar size.

scholarly journals Enhanced Frequency Reconfigurable Antenna for LTE Implementations

2020 ◽  
pp. 104-107
Author(s):  
Sathishkumar N ◽  
Nandalal V ◽  
Balaji V ◽  
Babuji R ◽  
Gnanaprakash V
Keyword(s):  
Reflection Coefficient ◽  
Reconfigurable Antenna ◽  
Cross Polarization ◽  
Pin Diodes ◽  
Maximum Gain ◽  
Full Wave ◽  
Operating Bandwidth ◽  
Working Principle ◽  
Directivity Characteristics ◽  
Frequency Reconfigurable Antenna

The design is focused on fabrication and testing of frequency reconfigurable antenna designed to operate in LTE and Wi-Fi implementations. The reconfigurable mechanism is governed by three PIN diodes and the operating bandwidth (1.38 GHz - 3.24 GHz) is efficiently controlled by diode’s different operating states. The antenna’s working principle is elucidated with the reflection coefficient, VSWR, gain and directivity characteristics. The antenna exhibits a maximum gain of 2.23 dBi and the VSWR of less than 1.5 throughout the bandwidth. The ON and OFF conditions of the diode go well with the desired operation and it does not induce the cross polarization. This work aims to design the simulations which are conceded using ANSYS HFSS full wave EM simulator and the measurements are in accordance with the simulated one.

Improved Radiation Characteristics of Small Antipodal Vivaldi Antenna for Microwave and Millimeter-Wave Imaging Applications

2017 ◽  
Vol 16 ◽  
pp. 1961-1964 ◽  
Author(s):  
Mahdi Moosazadeh ◽  
Sergey Kharkovsky ◽  
Joseph T. Case ◽  
Bijan Samali
Keyword(s):  
Millimeter Wave ◽  
Radiation Characteristics ◽  
Millimeter Wave Imaging ◽  
Wave Imaging ◽  
Vivaldi Antenna

Reconfigurable dual-mode band-pass filter with switchable bandwidth using PIN diodes

2014 ◽  
Vol 7 (6) ◽  
pp. 655-660 ◽  
Author(s):  
Photos Vryonides ◽  
Symeon Nikolaou ◽  
Sangkil Kim ◽  
Manos M. Tentzeris
Keyword(s):  
Insertion Loss ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Dual Mode ◽  
Pin Diodes ◽  
Pass Filter ◽  
Physical Size ◽  
Wireless Applications ◽  
Band Pass ◽  
Dc Bias

A reconfigurable band-pass filter with switchable bandwidth, for wireless applications is demonstrated using a dual-mode microstrip square-loop resonator. The proposed filter has been designed on Rogers RO4003C and achieves switchable bandwidth by changing the length of two tuning stubs with the implementation of two strategically placed p-i-n diodes as switching elements. The filter was designed with a center frequency of 2.4 GHz and the two distinct operation states have bandwidths, 113 MHz (4.8%) with an insertion loss of 1.2 dB and 35 MHz (1.5%) with an insertion loss of 1.5 dB. The physical size of the fabricated reconfigurable filter including the implementation of the DC bias lines is comparable to the size of a conventional filter.

Design of Antipodal Vivaldi Antenna Array

2013 ◽  
Vol 380-384 ◽  
pp. 3465-3468
Author(s):  
Hai Bo Tang ◽  
Xiao Zhong Shui
Keyword(s):  
Antenna Array ◽  
Standing Wave ◽  
Voltage Standing Wave Ratio ◽  
Radiation Characteristics ◽  
Vivaldi Antenna ◽  
Cross Structure ◽  
Structure Array

Firstly in this paper,an antipodal Vivaldi antenna is designed.The bandwidth is from 6GHz to 18GHz. The simulated results show good electric performance and the voltage standing wave ratio is less than 2 in the whole bandwidth.Secondly depending on this unit,this paper designs two kinds of arrays and estimates their radiation characteristics,respectively.The one array is a 1×8 array and the another array is a X-cross structure array with four elements.

scholarly journals A Wideband End-Fire Conformal Vivaldi Antenna Array Mounted on a Dielectric Cone

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Zengrui Li ◽  
Xiaole Kang ◽  
Jianxun Su ◽  
Qingxin Guo ◽  
Yaoqing (Lamar) Yang ◽  
...  
Keyword(s):  
Antenna Array ◽  
Antenna Element ◽  
Radiation Characteristics ◽  
Antenna Measurement ◽  
Radiation Beam ◽  
Conformal Antenna ◽  
Single Antenna ◽  
Measurement Results ◽  
Vivaldi Antenna ◽  
Good Agreement

The characteristics of a novel antipodal Vivaldi antenna array mounted on a dielectric cone are presented. By employing antipodal Vivaldi antenna element, the antenna array shows ultrawide bandwidth and end-fire radiation characteristics. Our simulations show that the cone curvature has an obvious influence on the performance of the conformal antenna, in terms of both the bandwidth and the radiation patterns. The thickness and permittivity of the dielectric cone have an effect on the bandwidth of the conformal antenna. Measurement results of both single antenna and conformal antenna array show a good agreement with the simulated results. The measured conformal antenna can achieve a −10 dBS11with bandwidth of 2.2–12 GHz and demonstrate a typical end-fire radiation beam. These findings provide useful guidelines and insights for the design of wideband end-fire antennas mounted on a dielectric cone.

A novel antipodal Vivaldi antenna loaded by linear array of sandglass‐type directors for wideband radiation characteristics improvement

2019 ◽  
Vol 61 (10) ◽  
pp. 2354-2359
Author(s):  
Jing‐Yao Mao ◽  
Lin Peng ◽  
Jing Ma ◽  
Bin Shi ◽  
Qi‐Xiang Zhao ◽  
...  
Keyword(s):  
Linear Array ◽  
Radiation Characteristics ◽  
Vivaldi Antenna

Radiation characteristics enhancement of dual‐polarized antipodal Vivaldi antenna using double‐slot structure

2019 ◽  
Vol 62 (3) ◽  
pp. 1245-1251
Author(s):  
Woojoong Kim ◽  
Jinsung Park ◽  
Hyeon‐Gyu Park ◽  
Young J. Yoon
Keyword(s):  
Radiation Characteristics ◽  
Vivaldi Antenna ◽  
Dual Polarized ◽  
Slot Structure
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