Title :
Dielectric and Conductor Loss Quantification for Microstrip Reflectarray: Simulations and Measurements
Author :
Rajagopalan, Harish ; Rahmat-Samii, Yahya
Author_Institution :
Univ. of California, Los Angeles
fDate :
4/1/2008 12:00:00 AM
Abstract :
The conductor and dielectric loss mechanisms in microstrip reflectarray are described using simulation models and waveguide measurements. The dielectric constant and loss tangent variation with frequency is obtained for a particular substrate using existing datasheets. Variable size patch reflectarray element was studied for loss characterization. The effect of these losses is characterized and the potential cause for the loss phenomenon is provided. It is observed that the dielectric loss and copper loss occur near the patch resonance due to strong electric fields in the substrate region below the patch and the large currents on the top surface of the patch, respectively.
Keywords :
electric fields; microstrip antenna arrays; permittivity; reflector antennas; conductor loss quantification; dielectric constant; dielectric loss; electric fields; loss tangent variation; microstrip reflectarray; variable size patch reflectarray; waveguide measurements; Conductors; Copper; Dielectric constant; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Dielectric substrates; Frequency; Loss measurement; Microstrip; Conductor loss; dielectric loss; reflectarray;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2008.919225
