Research on input impedance of dipole antenna in GTEM cell

2014 ◽  
Vol 31 (6) ◽  
pp. 603-608 ◽  
Author(s):  
Shuguang Xing ◽  
Xiaode Lv ◽  
Chibiao Ding
Keyword(s):  
Input Impedance ◽  
Dipole Antenna ◽  
Gtem Cell

scholarly journals Analyses of a Dipole Antenna Loaded by a Cylindrical Shell of Double Negative (DNG) Metamaterial

2007 ◽  
Vol 2007 ◽  
pp. 1-10 ◽  
Author(s):  
Khan M. Z. Shams ◽  
Mohammod Ali
Keyword(s):  
Cylindrical Shell ◽  
Input Impedance ◽  
Dipole Antenna ◽  
Double Negative ◽  
Beam Splitting ◽  
Thin Cylindrical Shell ◽  
Half Wavelength ◽  
Antenna Length ◽  
Galerkin Formulation ◽  
Parameter Values

The current distribution, input impedance, and radiation pattern of a cylindrical dipole antenna enclosed by a thin cylindrical shell of double negative (DNG) metamaterial are computed using the piecewise sinusoidal Galerkin formulation. In the presence of the DNG shell, the dipole antenna exhibits three interesting characteristics. The input impedance shows potentials for wide bandwidth due to the relative insensitivity of the impedance with frequency. Within specific ranges of DNG material parameter values, the dipole shows resonance at much lower frequencies than its resonant frequency in free space. The dipole does not show change in the direction of the principal beam nor does it show signs of beam splitting and side lobes even when the antenna length approaches one and a half wavelength.

scholarly journals Microruban Dipole Antenna for RFID Applications at 2.45 GHz

2016 ◽  
Vol 6 (6) ◽  
pp. 2891 ◽  
Author(s):  
Loubna Berrich ◽  
Lahbib Zenkouar
Keyword(s):  
Radio Frequency Identification ◽  
Integrated Circuit ◽  
Input Impedance ◽  
Dipole Antenna ◽  
Antenna Design ◽  
Reflection Coefficients ◽  
Ansoft Hfss ◽  
Frequency Identification ◽  
Folded Dipole ◽  
Rfid Applications

<p><span lang="EN-US">Radio Frequency Identification (RFID) is a technology used mainly to identify tagged items or to track their locations. The most used antennas for RFID application are planar dipoles. For antenna design, it is necessary that the antenna has an impedance value equal to the conjugate of the impedance of the integrated circuit CI. To have a good adaptation allowing the maximum power transfer, there are several techniques. In this work we focus to the adaptation technical T-match which is based on the insertion of a second folded dipole in the center of the first dipole. This technique is modeled by an equivalent circuit to calculate the size of the folded dipole to have new input impedance of the antenna equal to the conjugate of the impedance of the IC. We also look to present a conceptual and technological approach of new topologies of linear dipoles. We proceeded to fold at right angles of the radiating strands in order to explore other topologiesof type  L and Z. The interest of this microstrip folded dipole is their effectiveness to achieve coverage of Blind directions. The results obtained by the platform Ansoft HFSS, allowed us to obtain a quasi-uniform radiation patterns and the reflection coefficients that exceed -37 dB.</span></p>

scholarly journals Microstrip Folded Dipole Antenna for 35 GHz MMW Communication

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Guang Hua ◽  
Chen Yang ◽  
Ping Lu ◽  
Hou-Xing Zhou ◽  
Wei Hong
Keyword(s):  
Input Impedance ◽  
Low Cost ◽  
Design Procedure ◽  
Dipole Antenna ◽  
Feed Line ◽  
Low Profile ◽  
Mode Method ◽  
Miniaturized Antenna ◽  
On Chip ◽  
Folded Dipole

A microstrip asymmetric folded dipole antenna on chip is proposed in this paper. The construction of balun feed line is adopted to provide wideband. A new design procedure based on the odd-even mode method to calculate the input impedance of an asymmetric strip folded dipole antenna is presented. The folded dipole antenna has the advantage of small size, low profile, low cost, and so forth. The measured results show that a miniaturized antenna has the bandwidth of more than 14.2% (VSWR≤2); gain of the antenna is 5.7 dB at 35 GHz.

Properties of the Input Impedance of a THz Dipole Antenna on Top of a Woodpile Structure

2013 ◽  
Vol 3 (6) ◽  
pp. 731-739
Author(s):  
Inigo Ederra ◽  
Juan-Carlos Iriarte-Galarregui ◽  
Ramon Gonzalo ◽  
Peter de Maagt
Keyword(s):  
Input Impedance ◽  
Dipole Antenna ◽  
Woodpile Structure
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