在此篇論文中主要介紹兩大部分，第一部份將介紹低損耗的介電材料，且試圖調整溫度飄移係數使其為零；第二部份將介紹其在被動電路之應用,且實做於不同基板上探討元件尺寸的改善。
第一部份首先要介紹Ca0.8Sr0.2TiO3陶瓷系統之微波介電特性。由實驗中可得知Ca0.8Sr0.2TiO3在1350℃燒結4小時可得到最佳之介電特性 ~181，Q×~8300(at 9GHz)， ~ +991 ppm/oC。由於此系統之 為正值，故選擇以 為負值且高介電係數及高品質因素的材料Mg0.95Ni0.05TiO3、Mg0.95Co0.05TiO3、Mg0.95Zn0.05TiO3添加，探討溫度飄移係數趨近零之最佳比例。
第二部份首先介紹具開路殘段之平行耦合濾波器，產生兩零點在通帶兩側並有抑制二倍頻的效果，我們利用電磁模擬軟體IE3D，在濾波器中心頻率 =2.4GHz、頻寬~7%的情況下模擬. 此外，我們將濾波器實做於FR4、Al2O3及0.95MZT-0.05CST(自製)三種基板上。以更高之介電常數及品質因素使濾波器的電路尺寸及頻率響應上有較佳之改善。
最後介紹具兩開路殘段矩形貼片天線，我們利用電磁模擬軟體HFSS,使用FR4版，在操作頻率 =1.57GHz(GPS)，探討開路殘段對矩形天線的影響。接著以0.95MZT-0.05CST的bulk作一具槽孔的雙頻介質共振天線(DRA) ，滿足IEEE 802.11n/p(2.4 GHz or 5 GHz bands and 5.86-5.925 GHz)通訊協定，探討微帶天線及加上DR對其影響。

There are two main subjects in this paper. First, we will discuss the low loss dielectric material, and try to make temperature coefficient of resonant frequency near zero. Second, there will be a discussion of passive components and improvement of circuit size in different substrates.
First, the microwave dielectric properties of Ca0.8Sr0.2TiO3 have been investigated. The experiment results show that Ca0.8Sr0.2TiO3 has the best properties at sintering temperature 1350℃ for four hours, which could reach the best dielectric properties ~ 181, Q×f ~ 8300(at 9GHz) and ~ +991 ppm/oC. Concerning about the positive value of , we choose adding the Mg0.95Ni0.05TiO3( ~ -45 ppm/oC)、Mg0.95Co0.05TiO3( ~ -55 ppm/oC) and Mg0.95Zn0.05TiO3( ~ -40 ppm/oC) to adjust the value, then we could make temperature coefficient of resonant frequency near zero.
Besides, with open stubs parraell-coupled lines bandpass filter were studied in second section which achieved two transmission zeros at passband edges and spurious responses supression by properly choosing the stubs locations and impedances. We simulated it by electromagnetic simulation software (IE3D) at the setting of center frequency 2.4GHz and bandwidth 7%. Also, we try to realize that the improvement of Insertion Loss and circuit size at the substitution of FR4, Al2O3 and 0.95MZT-0.05CST for the microstrip bandpass filter.
Finally,with two open stubs as radiators microstrip patch antenna were proposed. We simulated it by electromagnetic simulation software (HFSS) at the setting of center frequency 1.57GHz for GPS.Then a dual-band dielectric resonator antenna using aperture-coupled were proposed.We used 0.95MZT-0.05CST bulk as a resonator for 5 GHz bands, and dual-band antenna well covered IEEE 802.11n/p communication protocol.

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