高整合度毫米波波導被動元件於低溫共燒陶瓷系統封裝技術之應用

Highly Integrated Millimeter-Wave Waveguide Passive Components Design for LTCC-based SiP Applications

陳建佳(Chien-Chia Chen)

指導教授 ： 吳瑞北

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2012年)

https://doi.org/10.6342/NTU.2012.10478

摘要

本篇論文主要提出具高整合度的毫米波被動元件之設計，並以低溫共燒陶瓷技術之基板合成波導來實現。第一部分是設計兩種不同濾波響應之帶通濾波器。第二部分則藉由共振器之多模態來設計雙頻帶濾波器與雙工器。第三部分則是設計兩種不同濾波響應之濾波天線。第四部分則將濾波天線與耦合器整合以達到系統整合之應用。
首先，本論文將柴比雪夫與三階交錯耦合響應之帶通濾波器以基板合成波導來實現在毫米波頻段，透過低溫共燒陶瓷的多層特性使得共振器間的耦合方式更加有彈性，也因為堆疊縮小了電路面積。
接下來本論文利用共振器之多模態來分別設計雙頻帶濾波器與雙工器，由不同模態間場型的正交性來獨立控制耦合係數。且透過適當饋入能夠同時激發共振腔之多個模態，以實現具頻段可調性之雙頻帶濾波器。另外在雙工器之輸入與輸出設計中，兩個模態的訊號能藉由兩個槽線分別獨立萃取出來以達到不錯的阻隔性。兩種設計皆透過多模態之正交性來將共振器數目減至最少。
再者，本論文以帶通濾波器之耦合架構與天線整合而成濾波天線，將濾波器最後一級共振器以基板合成波導槽線天線來取代，透過適當設計便能使天線的增益與反射損耗具有濾波器響應，提高通帶邊緣選擇性與更平坦的通帶輻射響應。
最後，本論文提出兩種將濾波天線整合耦合器之元件。其中將濾波天線整合180度耦合器，利用對稱和反對稱之模態來激發槽線天線陣列以分別達到加總與相差的天線場型。而另一種則將濾波天線整合90度耦合器，藉由耦合共振器網路來取代傳統枝幹耦合器的四分之一波長傳輸線，使得槽線天線陣列之相位激發為90度差以達到圓形極化。此兩種設計將濾波器、天線與耦合器整合成單一電路元件達到電路微小化。

關鍵字

基板合成波導 ； 多模態正交 ； 低溫共燒陶瓷 ； 濾波器 ； 槽線天線 ； 雙工器

並列摘要

This thesis aims at the design of highly integrated millimeter-wave passive
components. Based on the SIW (Substrate Integrate Waveguide) implemented on LTCC
(Low Temperature Co-fired Ceramics), the first part is focused on the bandpass filters
designs of two different response; the second part on a dual-band filter and a diplexer by multi-mode method/ the third part on filtering antennas of two different responses; and in the last part, the integration of filtering antenna and coupler to achieve system application.
First of all, the Chebyshev and trisection response filters are implemented by SIW in millimeter-wave spectrum. Based on the multi-layer feature of LTCC, the coupling between resonators becomes more flexible, and the filter size can be miniaturized.
Next, the feature of multiple cavity modes is applied to realize a dual-band filter and a diplexer. By modal orthogonality, the desired coupling coefficients and external quality factors can be controlled at both bands independently. Multiple modes can be excited simultaneously with the proper feeding position for a dual-band filter with improved band allocation. Furthermore, two orthogonal slots opened in the common input and output resonators are designed to extract two modes independently and yet with good isolation of a diplexer.
For the design of filtering antennas, the antenna acts an equivalent load to the filter by the synthesis process of bandpass filters. The antenna gain and return loss show a well defined filtering response. It also provides flatter passband gain response and higher band-edge selectivity.
Finally, two filtering antenna integrated couplers are exhibited. One is integrated with 180 degree coupler. By utilizing the two orthogonal fields of TE201 and TE102 modes, the in-phase and out-of-phase responses can be achieved to provide sum and difference patterns from the two slot antenna array. The other one is integrated with 90 degree coupler. The quarter-wavelength transmission lines can be made equivalent to the coupling between resonators. The polarization of two slot antennas fed with a 90 degree phase difference would be circular along zenith direction.

並列關鍵字

Substrate integrated waveguide ； Multi-mode resonators ； Low Temperature Co-fired Ceramics ； Filter ； Slot antenna ； Diplexer

參考文獻

[28] 林威志，具多重選擇性頻帶配置之四頻段濾波器設計，國立台灣大學碩士論文，2011年6月

[29] 蔡宛伶，以多模態及頻率轉換實現之多頻段濾波器及雙工器，國立台灣大學碩士論文，2010年6月

[31] 陳錡楓，具有多功能應用之小型化帶通濾波器及多工器設計，國立台灣大學博士論文，2006年6月

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