使用低溫共燒陶瓷製程設計無線區域網路差動帶通濾波器與應用於GPRS之天線開關模組

Differential bandpass filters for WLAN and antenna switch module for GPRS applications using LTCC process

黃健瑋(Chien-Wei Huang)

指導教授 ： 盧信嘉

國立臺灣大學/電機資訊學院/電子工程學研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.02593

摘要

本篇論文可以分成兩大部分，第一部分是應用於無線區域網路具有兩個傳輸零點的差動帶通濾波器。差動架構的射頻前端模組可以減少離散元件的使用（例如：balun），並且降低共模雜訊的干擾，此外兩個傳輸零點可以改善濾波器中止帶的頻率響應。第二部分是應用於三頻GSM手機的天線開關模組。此模組在接收模式時不消耗直流功率，所以特別適合使用在手持裝置。兩個電路都是採用低溫共燒陶瓷製程來實現。選擇此製程的原因是其有較低的正切損失以及多層結構可以使電路有較好的插入損失並且有利於差動電路的設計。

關鍵字

低溫共燒陶瓷 ； 無線區域網路 ； 差動 ； 帶通濾波器 ； 天線開關模組

並列摘要

There are two parts in this thesis. The first part is the design of differential bandpass filters with two transmission zeros for WLAN. The differential structure can reduce the discrete components, such as baluns, of the front end module. It can also improve the poor ground and suppress the common-mode interference. Besides, two zeros can increase the rejection of the stopband. The second part is the design of an antenna switch module for tri-band GSM handset. This module consumes no DC power in receiving mode, so it is especially suitable for handset application. Two circuits are implemented by LTCC process which is chosen for low loss and multi-layer structure. It will give better insertion loss and more freedom in differential device design.

並列關鍵字

LTCC ； differential ； WLAN ； filter ； switch

參考文獻

Fujiki Y., Mandai H., Morikawa T., “Chip type spiral broadside coupled directional couplers and baluns using low temperature co-fired ceramic,” in Electronic Components and Technology Conference, 1999 Proceedings. 49th, pp. 105-110, 1-4 June 1999.

Al-Taei S., Lane P., Passiopoulos G., “Design of high directivity directional couplers in multilayer ceramic technologies,” in IEEE MTT-S Int. Microwave Symp. Dig., 2001, Vol. 1, pp. 51-54, 20-25 May 2001.

Ching-Wen Tang, Yin-Ching Lin, Chi-Yang Chang, “Realization of transmission zeros in combline filters using an auxiliary inductively coupled ground plane,” IEEE Trans. Microwave Theory Tech., Vol. 51, pp. 2112-2118, Oct. 2003.

K.-L. Wu, Y.-J. Zhao, J. Wang, M.K.K. Cheng, “An Effective Dynamic Coarse Model for Optimization Design of LTCC RF Circuits With Aggressive Space Mapping,” IEEE Trans. Microwave Theory Tech., Vol. 52, pp. 393-402, Jan. 2004.

Jyh-Wen Sheen, “LTCC-MLC duplexer for DCS-1800,” IEEE Trans. Microwave Theory Tech., Vol. 47, pp. 1883-1890, Sept. 1999.