Design and Analysis of Integrated Wilkinson Power Divider-Fed Conformal High-Gain UWB Array Antenna with Band Rejection Characteristics for WLAN Applications

Abstract

Flexible ultra-wideband (UWB) antenna arrays with band notching characteristics are proposed in this work. A new wideband and high-isolation Wilkinson power divider (WPD) is designed to construct the feed systems of the UWB antenna arrays. The proposed WPD is achieved by introducing a significant modification to the conventional WPD and the new one is composed of four isolation stages. Multiple stages helped to achieve wideband from 2[Formula: see text]GHz to more than 12[Formula: see text]GHz with high isolation characteristics of more than 20[Formula: see text]dB and insertion losses around 3.3[Formula: see text]dB. The designed WPD is then applied to feed two UWB monopole antenna arrays which offer a notched band centered at 5.5[Formula: see text]GHz to reject interference from wireless local area network (WLAN) system and can be integrated with curved surfaces. To verify the performance of the proposed structure, two array configurations are practically fabricated and measured. The results show that both the arrays have UWB operational bandwidth (3.5–11.8[Formula: see text]GHz for [Formula: see text] array and 3.6–12[Formula: see text]GHz for [Formula: see text] array) that includes the UWB spectrum. Attractive agreement between simulation and measurement results is obtained. Furthermore, the bending test is carried out on the [Formula: see text] array showing the good performance of the proposed system when installed on curved surfaces for different bent angles.

M-Shaped Conformal Antenna with FSS Backing for Gain Enhancement

“…The radiating structure is looking like an Mshape and the micro-design model was designed to stimulate the antenna. Complementary split rings are placed beside the feedline to attain metamaterial characteristics in the design [18]. The proposed structure has been presented in Figure 1a,b as well as the dimensional view of metamaterial is also shown in Figure 1c.…”

Design of wide rejection harmonic band Wilkinson power divider based on single suppressor topology for UHF applications

“…𝐶 𝑔 = 𝐶 𝑥 + 𝐶 𝑦 (9) 𝐶 𝑦 < 0 , 𝑎𝑛𝑑 𝐶 𝑥 < 𝐶 𝑔 (10) The values of the formulas are simplified by Mathematica software:…”

“…This disadvantage can be seen in power tri-frequency power divider of [7]. To enhance of harmonic suppression disadvantage, power dividers with H-shaped resonators [8], four isolation stages for ultra-wide operational band [9] and embedding three-line coupled structures [10], are presented. In other designs of power dividers, disadvantages such as large size [11][12][13] and high losses can be seen [14,15].…”

Analytical Study on Conformal M-Shaped Monopole Antenna with Metamaterial Loading

“…Kavya [9] designed MIMO antenna for millimetric applications and Prudhvi [109] designed internet of vehicular application-based conformal fractal antenna. Lakrit [11] designed an UWB array antenna with conformal nature and Sandeep [12] designed circularly polarized wearable antenna on the jute substrate material. Vineetha [13] designed microwave absorber for the WLAN, WiMAX and ISM band applications on flexible substrate material.…”