Enhanced bandwidth small E-Shaped monopole antenna for UWB applications with variable frequency band-notch function

2011 ◽  
Vol 54 (1) ◽  
pp. 267-271 ◽  
Author(s):  
H. Karimi ◽  
Ch. Ghobadi ◽  
J. Nourinia ◽  
M. Ojaroudi
2018 ◽  
Vol 10 (12) ◽  
pp. 122 ◽  
Author(s):  
Zubin Chen ◽  
Baijun Lu ◽  
Yanzhou Zhu ◽  
Hao Lv

In this paper, a printed monopole antenna design for WiMAX/WLAN applications in cable-free self-positioning seismograph nodes is proposed. Great improvements were achieved in miniaturizing the antenna and in widening the narrow bandwidth of the high-frequency band. The antenna was fed by a microstrip gradient line and consisted of a triangle, an inverted-F shape, and an M-shaped structure, which was rotated 90° counterclockwise to form a surface-radiating patch. This structure effectively widened the operating bandwidth of the antenna. Excitation led to the generation of two impedance bands of 2.39–2.49 and 4.26–7.99 GHz for a voltage standing wave ratio of less than 2. The two impedance bandwidths were 100 MHz, i.e., 4.08% relative to the center frequency of 2.45 GHz, and 3730 MHz, i.e., 64.31% relative to the center frequency of 5.80 GHz, covering the WiMAX high-frequency band (5.25–5.85 GHz) and the WLAN band (2.4/5.2/5.8). This article describes the design details of the antenna and presents the results of both simulations and experiments that show good agreement. The proposed antenna meets the field-work requirements of cable-less seismograph nodes.


2008 ◽  
Vol 50 (9) ◽  
pp. 2309-2311 ◽  
Author(s):  
Yue Song ◽  
Yong‐Chang Jiao ◽  
Fu‐Shun Zhang ◽  
Li Zhang ◽  
Hui Zhao ◽  
...  

2011 ◽  
Vol 57 (1) ◽  
pp. 109-113 ◽  
Author(s):  
Mohsen Hosseini-Varkiani ◽  
Farokh Hojat-Kashani ◽  
Manochehr Hesari

Design of an Ultrawideband CPW-Fed Monopole Antenna with a Band-Notch FunctionIn this paper, a CPW-fed monopole antenna for ultra wideband (UWB) applications using band-notch characteristics with size of (24×24×1.6 mm3) is presented. The antenna is designed for operation across the entire UWB from 3.1 to 10.6 GHz with band-notch in 5-6 GHz, by inserting an H-shaped slot on the CPW staircase feed line. The proposed antenna has a reflection coefficient below -10 dB through the frequency band. Also, reasonable gain values and good radiation pattern over the same frequency band have been observed. Details of the proposed antenna and experimental results are discussed and parametric study is presented.


2010 ◽  
Vol 15 ◽  
pp. 133-144 ◽  
Author(s):  
Shahabodin Yazdanifard ◽  
Ramezan Ali Sadeghzadeh ◽  
Mohammad Ojaroudi

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