Microwave dielectric properties of Mg4Ta2O9 ceramics with TiO2 for DRO (Electron devices: 第15回先端半導体デバイスの基礎と応用に関するアジア・太平洋ワークショップ(AWAD2007))

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概要

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• 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.

• 社団法人電子情報通信学会の論文
• 2007-06-18

著者

• Lee Young-Hie

  Electronic Materials Engineering, Kwangwoon University

• Ryu Ki-Won

  Electronic Engineering, Yeojoo College

• Lee Young-hie

  Electronic Materials Engineering Kwangwoon University

• KIM Jae-Sik

  Kwangwoon University

• RYU Ki-Won

  Yeojoo College

• Kim Jae-Sik

  Electronic Materials Engineering, Kwangwoon University

• Bae Seon-Gi

  Electric Engineering, Incheon Univertisy

• Bae Seon-gi

  Electric Engineering Incheon Univertisy

関連論文

• A study on MgO-Ta2O5 system ceramics for microwave component application (Electron devices: 第15回先端半導体デバイスの基礎と応用に関するアジア・太平洋ワークショップ(AWAD2007))
• A study on MgO-Ta2O5 system ceramics for microwave component application (Silicon devices and materials: 第15回先端半導体デバイスの基礎と応用に関するアジア・太平洋ワークショップ(AWAD2007))
• A Study on MgO-Ta_2O_5 System Ceramics for Microwave Component Application
• Microwave dielectric properties of Mg4Ta2O9 ceramics with TiO2 for DRO (Electron devices: 第15回先端半導体デバイスの基礎と応用に関するアジア・太平洋ワークショップ(AWAD2007))
• Microwave dielectric properties of Mg4Ta2O9 ceramics with TiO2 for DRO (Silicon devices and materials: 第15回先端半導体デバイスの基礎と応用に関するアジア・太平洋ワークショップ(AWAD2007))

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