%0 Journal Article %1 WOS:000373107400049 %A Oliveira, R G M %A Freitas, D B %A Romeu, M C %A Silva, M A S %A Sales, A J M %A Ferreira, A C %A Filho, J M S %A Sombra, A S B %C 111 RIVER ST, HOBOKEN 07030-5774, NJ USA %D 2016 %I WILEY %J MICROWAVE AND OPTICAL TECHNOLOGY LETTERS %K antenna} dielectric frequency; measurements; numerical resonant resonator simulation; {microwave %N 5 %P 1211-1217 %R 10.1002/mop.29765 %T DESIGN AND SIMULATION OF Na2Nb4O11 DIELECTRIC RESONATOR ANTENNA ADDED WITH Bi2O3 FOR MICROWAVE APPLICATIONS %V 58 %X In this paper is reported an experimental and numerical investigation of the microwave dielectric properties of Na2Nb4O11 (NN), ceramic matrix added with (0, 2, 5, and 10 wt%) of Bi2O3, obtained through a new procedure based on the solid-state method. The experimental and theoretical characteristics of the resonator like return loss, bandwidth, input impedance are in good agreement. The simulations of radiation patterns are presented. For NN reference sample, frequency response bandwidth is of 43MHz (simulated) and 35MHz (experimental) for frequency operation around 2.28 GHz. The NN reference sample showed a dielectric permittivity around 58.4, with loss around 7.3 x 10 2 3. The adding of bismuth oxide (2 and 5 wt%) reduced the value of the dielectric permittivity, otherwise the adding of 10 wt% increases its value. The temperature coefficient of resonant frequency (sf) was also measured for all dielectric samples. The values obtained were in the range of 23378 to 2250ppm/degrees C. The results obtained confirm the necessity of producing composites of this material with others positive sf materials for obtaining dielectric resonator antennas with tau f=0. (C) 2016 Wiley Periodicals, Inc.

@article{WOS:000373107400049, abstract = {In this paper is reported an experimental and numerical investigation of the microwave dielectric properties of Na2Nb4O11 (NN), ceramic matrix added with (0, 2, 5, and 10 wt%) of Bi2O3, obtained through a new procedure based on the solid-state method. The experimental and theoretical characteristics of the resonator like return loss, bandwidth, input impedance are in good agreement. The simulations of radiation patterns are presented. For NN reference sample, frequency response bandwidth is of 43MHz (simulated) and 35MHz (experimental) for frequency operation around 2.28 GHz. The NN reference sample showed a dielectric permittivity around 58.4, with loss around 7.3 x 10 2 3. The adding of bismuth oxide (2 and 5 wt%) reduced the value of the dielectric permittivity, otherwise the adding of 10 wt% increases its value. The temperature coefficient of resonant frequency (sf) was also measured for all dielectric samples. The values obtained were in the range of 23378 to 2250ppm/degrees C. The results obtained confirm the necessity of producing composites of this material with others positive sf materials for obtaining dielectric resonator antennas with tau f=0. (C) 2016 Wiley Periodicals, Inc.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, author = {Oliveira, R G M and Freitas, D B and Romeu, M C and Silva, M A S and Sales, A J M and Ferreira, A C and Filho, J M S and Sombra, A S B}, biburl = {https://www.bibsonomy.org/bibtex/27ad65037cd5a7f392cd41261f1acd2e6/ppgfis_ufc_br}, doi = {10.1002/mop.29765}, interhash = {61bd11baac03c04bbbd0d728d25825c7}, intrahash = {7ad65037cd5a7f392cd41261f1acd2e6}, issn = {0895-2477}, journal = {MICROWAVE AND OPTICAL TECHNOLOGY LETTERS}, keywords = {antenna} dielectric frequency; measurements; numerical resonant resonator simulation; {microwave}, number = 5, pages = {1211-1217}, publisher = {WILEY}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {DESIGN AND SIMULATION OF Na2Nb4O11 DIELECTRIC RESONATOR ANTENNA ADDED WITH Bi2O3 FOR MICROWAVE APPLICATIONS}, tppubtype = {article}, volume = 58, year = 2016 }