| Presentation | 2007/6/18 Microwave dielectric properties of Mg_4Ta_2O_9 ceramics with TiO_2 for DRO Jae-Sik Kim, Young-Hie Lee, Seon-Gi Bae, Ki-Won Ryu, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this study, the microwave dielectric properties of the Mg_4Ta_O_9 electroceramics with TiO_2 addition were investigated for dielectric resonator oscillator (DRO). All specimens were prepared by solid-state reaction method and sintered at 1450℃. From the XRD patterns, the Mg_4Ta_2O_9 phase existed in the Mg_4Ta_2O_9 ceramics doped with TiO_2 as a main phase and the MgTi_2O_5 phase was appeared by increasing of TiO_2 addition. The characteristic of the MgTi_2O_5 and TiO_2 phases had an effect on the microwave dielectric properties of the Mg_4Ta_2O_9 ceramics doped with TiO_2. There was excellent improvement in the temperature coefficient of resonant frequency (TCRF) by addition of 0.5-mole% TiO_2. However there was a little decrement of the quality factor from 116,800 GHz of non-doped Mg_4Ta_2O_9 ceramics to 102,100 GHz of 0.5-mole% TiO_2 doped one. The dielectric constant, quality factor and TCRF of the Mg_4Ta_2O_9 ceramics doped with 0.5-mole% TiO_2 sintered at 1450℃ for 10 hours were 14.83, 102,100 GHz and +3.46 ppm/℃. Advanced Design System (ADS), electro-magnetic simulation tool, was used for simulation and design for DR and DRO. The simulated DR with the Mg_4Ta_2O_9 ceramics doped with 0.5-mole% TiO_2 had the operating frequency of 11.97 GHz and S_<21> of-35.034 dB. The size of the manufactured DRO was 56×48×34 mm^3 and it was operated at 11.93 GHz. Power output and secondary harmonic of the manufactured DRO were +13.61 dBm and -23.81 dBc at 23.85 GHz, respectively. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Microwave dielectric properties / Mg_4Ta_2O_9 / TiO_2 / DRO |
| Paper # | ED2007-68,SDM2007-73 |
| Date of Issue |
| Conference Information | |
| Committee | ED |
|---|---|
| Conference Date | 2007/6/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Electron Devices (ED) |
|---|---|
| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Microwave dielectric properties of Mg_4Ta_2O_9 ceramics with TiO_2 for DRO |
| Sub Title (in English) | |
| Keyword(1) | Microwave dielectric properties |
| Keyword(2) | Mg_4Ta_2O_9 |
| Keyword(3) | TiO_2 |
| Keyword(4) | DRO |
| 1st Author's Name | Jae-Sik Kim |
| 1st Author's Affiliation | Electronic Materials Engineering, Kwangwoon University() |
| 2nd Author's Name | Young-Hie Lee |
| 2nd Author's Affiliation | Electronic Materials Engineering, Kwangwoon University |
| 3rd Author's Name | Seon-Gi Bae |
| 3rd Author's Affiliation | Electric Engineering, Incheon Univertisy |
| 4th Author's Name | Ki-Won Ryu |
| 4th Author's Affiliation | Electronic Engineering, Yeojoo College |
| Date | 2007/6/18 |
| Paper # | ED2007-68,SDM2007-73 |
| Volume (vol) | vol.107 |
| Number (no) | 110 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |