Measurement of dielectric permittivity and loss tangent for bulk foam samples with suspended ring resonator method

2006 ◽  
Author(s):  
I. Waldron ◽  
S.N. Makarov
Keyword(s):  
Dielectric Permittivity ◽  
Loss Tangent ◽  
Ring Resonator ◽  
Resonator Method ◽  
Dielectric Permittivity And Loss

scholarly journals Paving the Way to Eco-Friendly IoT Antennas: Tencel-Based Ultra-Thin Compact Monopole and Its Applications to ZigBee

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3658
Author(s):  
María Elena de Cos Gómez ◽  
Humberto Fernández Álvarez ◽  
Alicia Flórez Berdasco ◽  
Fernando Las-Heras Andrés
Keyword(s):  
Dielectric Permittivity ◽  
Frequency Band ◽  
Loss Tangent ◽  
Relative Dielectric Permittivity ◽  
Iot Applications ◽  
Half Wave ◽  
And Performance ◽  
Dielectric Permittivity And Loss ◽  
Range Test ◽  
The Way

An ultrathin, compact ecofriendly antenna suitable for IoT applications around 2.45 GHz is achieved as a result of exploring the use of Tencel fabric for the antenna’s design. The botanical ecofriendly Tencel is electromagnetically characterized, in terms of relative dielectric permittivity and loss tangent, in the target IoT frequency band. To explore the suitability of the Tencel, a comparison is conducted with conventionally used RO3003, with similar relative dielectric permittivity, regarding the antenna dimensions and performance. In addition, the antenna robustness under bent conditions is also analyzed by measurement. To assess the relevance of this contribution, the ultrathin ecofriendly Tencel-based antenna is compared with recently published antennas for IoT in the same band and also, with commercial half-wave dipole by performing a range test on a ZigBee-based IoT testbed.

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